--- /dev/null
+/****************************************************************************
+*
+* Realmode X86 Emulator Library
+*
+* Copyright (C) 1996-1999 SciTech Software, Inc.
+* Copyright (C) David Mosberger-Tang
+* Copyright (C) 1999 Egbert Eich
+*
+* ========================================================================
+*
+* Permission to use, copy, modify, distribute, and sell this software and
+* its documentation for any purpose is hereby granted without fee,
+* provided that the above copyright notice appear in all copies and that
+* both that copyright notice and this permission notice appear in
+* supporting documentation, and that the name of the authors not be used
+* in advertising or publicity pertaining to distribution of the software
+* without specific, written prior permission. The authors makes no
+* representations about the suitability of this software for any purpose.
+* It is provided "as is" without express or implied warranty.
+*
+* THE AUTHORS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+* EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
+* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+* PERFORMANCE OF THIS SOFTWARE.
+*
+* ========================================================================
+*
+* Language: ANSI C
+* Environment: Any
+* Developer: Kendall Bennett
+*
+* Description: This file includes subroutines to implement the decoding
+* and emulation of all the x86 processor instructions.
+*
+* There are approximately 250 subroutines in here, which correspond
+* to the 256 byte-"opcodes" found on the 8086. The table which
+* dispatches this is found in the files optab.[ch].
+*
+* Each opcode proc has a comment preceeding it which gives it's table
+* address. Several opcodes are missing (undefined) in the table.
+*
+* Each proc includes information for decoding (DECODE_PRINTF and
+* DECODE_PRINTF2), debugging (TRACE_REGS, SINGLE_STEP), and misc
+* functions (START_OF_INSTR, END_OF_INSTR).
+*
+* Many of the procedures are *VERY* similar in coding. This has
+* allowed for a very large amount of code to be generated in a fairly
+* short amount of time (i.e. cut, paste, and modify). The result is
+* that much of the code below could have been folded into subroutines
+* for a large reduction in size of this file. The downside would be
+* that there would be a penalty in execution speed. The file could
+* also have been *MUCH* larger by inlining certain functions which
+* were called. This could have resulted even faster execution. The
+* prime directive I used to decide whether to inline the code or to
+* modularize it, was basically: 1) no unnecessary subroutine calls,
+* 2) no routines more than about 200 lines in size, and 3) modularize
+* any code that I might not get right the first time. The fetch_*
+* subroutines fall into the latter category. The The decode_* fall
+* into the second category. The coding of the "switch(mod){ .... }"
+* in many of the subroutines below falls into the first category.
+* Especially, the coding of {add,and,or,sub,...}_{byte,word}
+* subroutines are an especially glaring case of the third guideline.
+* Since so much of the code is cloned from other modules (compare
+* opcode #00 to opcode #01), making the basic operations subroutine
+* calls is especially important; otherwise mistakes in coding an
+* "add" would represent a nightmare in maintenance.
+*
+****************************************************************************/
+
+/* $XFree86: xc/extras/x86emu/src/x86emu/ops.c,v 1.8tsi Exp $ */
+
+#include "x86emu/x86emui.h"
+
+/*----------------------------- Implementation ----------------------------*/
+
+/****************************************************************************
+PARAMETERS:
+op1 - Instruction op code
+
+REMARKS:
+Handles illegal opcodes.
+****************************************************************************/
+static void x86emuOp_illegal_op(
+ u8 op1)
+{
+ START_OF_INSTR();
+ if (M.x86.R_SP != 0) {
+ DECODE_PRINTF("ILLEGAL X86 OPCODE\n");
+ TRACE_REGS();
+ printk("%04x:%04x: %02X ILLEGAL X86 OPCODE!\n",
+ M.x86.R_CS, M.x86.R_IP-1,op1);
+ HALT_SYS();
+ }
+ else {
+ /* If we get here, it means the stack pointer is back to zero
+ * so we are just returning from an emulator service call
+ * so therte is no need to display an error message. We trap
+ * the emulator with an 0xF1 opcode to finish the service
+ * call.
+ */
+ X86EMU_halt_sys();
+ }
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x00
+****************************************************************************/
+static void x86emuOp_add_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 *destreg, *srcreg;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x01
+****************************************************************************/
+static void x86emuOp_add_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = add_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x02
+****************************************************************************/
+static void x86emuOp_add_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x03
+****************************************************************************/
+static void x86emuOp_add_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADD\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = add_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x04
+****************************************************************************/
+static void x86emuOp_add_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADD\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = add_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x05
+****************************************************************************/
+static void x86emuOp_add_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("ADD\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("ADD\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = add_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = add_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x06
+****************************************************************************/
+static void x86emuOp_push_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tES\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_ES);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x07
+****************************************************************************/
+static void x86emuOp_pop_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tES\n");
+ TRACE_AND_STEP();
+ M.x86.R_ES = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x08
+****************************************************************************/
+static void x86emuOp_or_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x09
+****************************************************************************/
+static void x86emuOp_or_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = or_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0a
+****************************************************************************/
+static void x86emuOp_or_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0b
+****************************************************************************/
+static void x86emuOp_or_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = or_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0c
+****************************************************************************/
+static void x86emuOp_or_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OR\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = or_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0d
+****************************************************************************/
+static void x86emuOp_or_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("OR\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("OR\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = or_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = or_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0e
+****************************************************************************/
+static void x86emuOp_push_CS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tCS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x0f. Escape for two-byte opcode (286 or better)
+****************************************************************************/
+static void x86emuOp_two_byte(u8 X86EMU_UNUSED(op1))
+{
+ u8 op2 = (*sys_rdb)(((u32)M.x86.R_CS << 4) + (M.x86.R_IP++));
+ INC_DECODED_INST_LEN(1);
+ (*x86emu_optab2[op2])(op2);
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x10
+****************************************************************************/
+static void x86emuOp_adc_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADC\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x11
+****************************************************************************/
+static void x86emuOp_adc_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADC\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = adc_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x12
+****************************************************************************/
+static void x86emuOp_adc_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADC\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x13
+****************************************************************************/
+static void x86emuOp_adc_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADC\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = adc_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x14
+****************************************************************************/
+static void x86emuOp_adc_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("ADC\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = adc_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x15
+****************************************************************************/
+static void x86emuOp_adc_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("ADC\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("ADC\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = adc_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = adc_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x16
+****************************************************************************/
+static void x86emuOp_push_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tSS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_SS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x17
+****************************************************************************/
+static void x86emuOp_pop_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tSS\n");
+ TRACE_AND_STEP();
+ M.x86.R_SS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x18
+****************************************************************************/
+static void x86emuOp_sbb_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SBB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x19
+****************************************************************************/
+static void x86emuOp_sbb_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SBB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sbb_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1a
+****************************************************************************/
+static void x86emuOp_sbb_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SBB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1b
+****************************************************************************/
+static void x86emuOp_sbb_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SBB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sbb_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1c
+****************************************************************************/
+static void x86emuOp_sbb_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SBB\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = sbb_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1d
+****************************************************************************/
+static void x86emuOp_sbb_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("SBB\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("SBB\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = sbb_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = sbb_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1e
+****************************************************************************/
+static void x86emuOp_push_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("PUSH\tDS\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_DS);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x1f
+****************************************************************************/
+static void x86emuOp_pop_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\tDS\n");
+ TRACE_AND_STEP();
+ M.x86.R_DS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x20
+****************************************************************************/
+static void x86emuOp_and_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AND\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x21
+****************************************************************************/
+static void x86emuOp_and_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AND\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = and_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x22
+****************************************************************************/
+static void x86emuOp_and_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AND\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x23
+****************************************************************************/
+static void x86emuOp_and_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AND\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_long(*destreg, srcval);
+ break;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_word(*destreg, srcval);
+ break;
+ }
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = and_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x24
+****************************************************************************/
+static void x86emuOp_and_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AND\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = and_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x25
+****************************************************************************/
+static void x86emuOp_and_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("AND\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("AND\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = and_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = and_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x26
+****************************************************************************/
+static void x86emuOp_segovr_ES(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ES:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_ES;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x27
+****************************************************************************/
+static void x86emuOp_daa(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DAA\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = daa_byte(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x28
+****************************************************************************/
+static void x86emuOp_sub_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SUB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x29
+****************************************************************************/
+static void x86emuOp_sub_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SUB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = sub_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2a
+****************************************************************************/
+static void x86emuOp_sub_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SUB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2b
+****************************************************************************/
+static void x86emuOp_sub_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SUB\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = sub_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2c
+****************************************************************************/
+static void x86emuOp_sub_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SUB\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = sub_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2d
+****************************************************************************/
+static void x86emuOp_sub_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("SUB\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("SUB\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = sub_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = sub_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2e
+****************************************************************************/
+static void x86emuOp_segovr_CS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("CS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_CS;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x2f
+****************************************************************************/
+static void x86emuOp_das(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DAS\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = das_byte(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x30
+****************************************************************************/
+static void x86emuOp_xor_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XOR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_byte(destval, *srcreg);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x31
+****************************************************************************/
+static void x86emuOp_xor_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XOR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_long(destval, *srcreg);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = xor_word(destval, *srcreg);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x32
+****************************************************************************/
+static void x86emuOp_xor_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XOR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x33
+****************************************************************************/
+static void x86emuOp_xor_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XOR\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = xor_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x34
+****************************************************************************/
+static void x86emuOp_xor_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XOR\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ M.x86.R_AL = xor_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x35
+****************************************************************************/
+static void x86emuOp_xor_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XOR\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("XOR\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = xor_long(M.x86.R_EAX, srcval);
+ } else {
+ M.x86.R_AX = xor_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x36
+****************************************************************************/
+static void x86emuOp_segovr_SS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("SS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_SS;
+ /* no DECODE_CLEAR_SEGOVR ! */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x37
+****************************************************************************/
+static void x86emuOp_aaa(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("AAA\n");
+ TRACE_AND_STEP();
+ M.x86.R_AX = aaa_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x38
+****************************************************************************/
+static void x86emuOp_cmp_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 *destreg, *srcreg;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(destval, *srcreg);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(destval, *srcreg);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(destval, *srcreg);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x39
+****************************************************************************/
+static void x86emuOp_cmp_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(destval, *srcreg);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(destval, *srcreg);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(destval, *srcreg);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3a
+****************************************************************************/
+static void x86emuOp_cmp_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(*destreg, srcval);
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(*destreg, srcval);
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(*destreg, srcval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3b
+****************************************************************************/
+static void x86emuOp_cmp_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(*destreg, srcval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(*destreg, srcval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ cmp_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3c
+****************************************************************************/
+static void x86emuOp_cmp_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMP\tAL,");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ cmp_byte(M.x86.R_AL, srcval);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3d
+****************************************************************************/
+static void x86emuOp_cmp_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CMP\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("CMP\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ cmp_long(M.x86.R_EAX, srcval);
+ } else {
+ cmp_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3e
+****************************************************************************/
+static void x86emuOp_segovr_DS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_DS;
+ /* NO DECODE_CLEAR_SEGOVR! */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x3f
+****************************************************************************/
+static void x86emuOp_aas(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("AAS\n");
+ TRACE_AND_STEP();
+ M.x86.R_AX = aas_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x40
+****************************************************************************/
+static void x86emuOp_inc_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tEAX\n");
+ } else {
+ DECODE_PRINTF("INC\tAX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = inc_long(M.x86.R_EAX);
+ } else {
+ M.x86.R_AX = inc_word(M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x41
+****************************************************************************/
+static void x86emuOp_inc_CX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tECX\n");
+ } else {
+ DECODE_PRINTF("INC\tCX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = inc_long(M.x86.R_ECX);
+ } else {
+ M.x86.R_CX = inc_word(M.x86.R_CX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x42
+****************************************************************************/
+static void x86emuOp_inc_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tEDX\n");
+ } else {
+ DECODE_PRINTF("INC\tDX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDX = inc_long(M.x86.R_EDX);
+ } else {
+ M.x86.R_DX = inc_word(M.x86.R_DX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x43
+****************************************************************************/
+static void x86emuOp_inc_BX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tEBX\n");
+ } else {
+ DECODE_PRINTF("INC\tBX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBX = inc_long(M.x86.R_EBX);
+ } else {
+ M.x86.R_BX = inc_word(M.x86.R_BX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x44
+****************************************************************************/
+static void x86emuOp_inc_SP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tESP\n");
+ } else {
+ DECODE_PRINTF("INC\tSP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESP = inc_long(M.x86.R_ESP);
+ } else {
+ M.x86.R_SP = inc_word(M.x86.R_SP);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x45
+****************************************************************************/
+static void x86emuOp_inc_BP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tEBP\n");
+ } else {
+ DECODE_PRINTF("INC\tBP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBP = inc_long(M.x86.R_EBP);
+ } else {
+ M.x86.R_BP = inc_word(M.x86.R_BP);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x46
+****************************************************************************/
+static void x86emuOp_inc_SI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tESI\n");
+ } else {
+ DECODE_PRINTF("INC\tSI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESI = inc_long(M.x86.R_ESI);
+ } else {
+ M.x86.R_SI = inc_word(M.x86.R_SI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x47
+****************************************************************************/
+static void x86emuOp_inc_DI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tEDI\n");
+ } else {
+ DECODE_PRINTF("INC\tDI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = inc_long(M.x86.R_EDI);
+ } else {
+ M.x86.R_DI = inc_word(M.x86.R_DI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x48
+****************************************************************************/
+static void x86emuOp_dec_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tEAX\n");
+ } else {
+ DECODE_PRINTF("DEC\tAX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = dec_long(M.x86.R_EAX);
+ } else {
+ M.x86.R_AX = dec_word(M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x49
+****************************************************************************/
+static void x86emuOp_dec_CX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tECX\n");
+ } else {
+ DECODE_PRINTF("DEC\tCX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = dec_long(M.x86.R_ECX);
+ } else {
+ M.x86.R_CX = dec_word(M.x86.R_CX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4a
+****************************************************************************/
+static void x86emuOp_dec_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tEDX\n");
+ } else {
+ DECODE_PRINTF("DEC\tDX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDX = dec_long(M.x86.R_EDX);
+ } else {
+ M.x86.R_DX = dec_word(M.x86.R_DX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4b
+****************************************************************************/
+static void x86emuOp_dec_BX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tEBX\n");
+ } else {
+ DECODE_PRINTF("DEC\tBX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBX = dec_long(M.x86.R_EBX);
+ } else {
+ M.x86.R_BX = dec_word(M.x86.R_BX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4c
+****************************************************************************/
+static void x86emuOp_dec_SP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tESP\n");
+ } else {
+ DECODE_PRINTF("DEC\tSP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESP = dec_long(M.x86.R_ESP);
+ } else {
+ M.x86.R_SP = dec_word(M.x86.R_SP);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4d
+****************************************************************************/
+static void x86emuOp_dec_BP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tEBP\n");
+ } else {
+ DECODE_PRINTF("DEC\tBP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBP = dec_long(M.x86.R_EBP);
+ } else {
+ M.x86.R_BP = dec_word(M.x86.R_BP);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4e
+****************************************************************************/
+static void x86emuOp_dec_SI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tESI\n");
+ } else {
+ DECODE_PRINTF("DEC\tSI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESI = dec_long(M.x86.R_ESI);
+ } else {
+ M.x86.R_SI = dec_word(M.x86.R_SI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x4f
+****************************************************************************/
+static void x86emuOp_dec_DI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tEDI\n");
+ } else {
+ DECODE_PRINTF("DEC\tDI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = dec_long(M.x86.R_EDI);
+ } else {
+ M.x86.R_DI = dec_word(M.x86.R_DI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x50
+****************************************************************************/
+static void x86emuOp_push_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tEAX\n");
+ } else {
+ DECODE_PRINTF("PUSH\tAX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_EAX);
+ } else {
+ push_word(M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x51
+****************************************************************************/
+static void x86emuOp_push_CX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tECX\n");
+ } else {
+ DECODE_PRINTF("PUSH\tCX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_ECX);
+ } else {
+ push_word(M.x86.R_CX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x52
+****************************************************************************/
+static void x86emuOp_push_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tEDX\n");
+ } else {
+ DECODE_PRINTF("PUSH\tDX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_EDX);
+ } else {
+ push_word(M.x86.R_DX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x53
+****************************************************************************/
+static void x86emuOp_push_BX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tEBX\n");
+ } else {
+ DECODE_PRINTF("PUSH\tBX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_EBX);
+ } else {
+ push_word(M.x86.R_BX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x54
+****************************************************************************/
+static void x86emuOp_push_SP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tESP\n");
+ } else {
+ DECODE_PRINTF("PUSH\tSP\n");
+ }
+ TRACE_AND_STEP();
+ /* Always push (E)SP, since we are emulating an i386 and above
+ * processor. This is necessary as some BIOS'es use this to check
+ * what type of processor is in the system.
+ */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_ESP);
+ } else {
+ push_word((u16)(M.x86.R_SP));
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x55
+****************************************************************************/
+static void x86emuOp_push_BP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tEBP\n");
+ } else {
+ DECODE_PRINTF("PUSH\tBP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_EBP);
+ } else {
+ push_word(M.x86.R_BP);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x56
+****************************************************************************/
+static void x86emuOp_push_SI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tESI\n");
+ } else {
+ DECODE_PRINTF("PUSH\tSI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_ESI);
+ } else {
+ push_word(M.x86.R_SI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x57
+****************************************************************************/
+static void x86emuOp_push_DI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSH\tEDI\n");
+ } else {
+ DECODE_PRINTF("PUSH\tDI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(M.x86.R_EDI);
+ } else {
+ push_word(M.x86.R_DI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x58
+****************************************************************************/
+static void x86emuOp_pop_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tEAX\n");
+ } else {
+ DECODE_PRINTF("POP\tAX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = pop_long();
+ } else {
+ M.x86.R_AX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x59
+****************************************************************************/
+static void x86emuOp_pop_CX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tECX\n");
+ } else {
+ DECODE_PRINTF("POP\tCX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = pop_long();
+ } else {
+ M.x86.R_CX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5a
+****************************************************************************/
+static void x86emuOp_pop_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tEDX\n");
+ } else {
+ DECODE_PRINTF("POP\tDX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDX = pop_long();
+ } else {
+ M.x86.R_DX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5b
+****************************************************************************/
+static void x86emuOp_pop_BX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tEBX\n");
+ } else {
+ DECODE_PRINTF("POP\tBX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBX = pop_long();
+ } else {
+ M.x86.R_BX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5c
+****************************************************************************/
+static void x86emuOp_pop_SP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tESP\n");
+ } else {
+ DECODE_PRINTF("POP\tSP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESP = pop_long();
+ } else {
+ M.x86.R_SP = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5d
+****************************************************************************/
+static void x86emuOp_pop_BP(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tEBP\n");
+ } else {
+ DECODE_PRINTF("POP\tBP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBP = pop_long();
+ } else {
+ M.x86.R_BP = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5e
+****************************************************************************/
+static void x86emuOp_pop_SI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tESI\n");
+ } else {
+ DECODE_PRINTF("POP\tSI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESI = pop_long();
+ } else {
+ M.x86.R_SI = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x5f
+****************************************************************************/
+static void x86emuOp_pop_DI(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POP\tEDI\n");
+ } else {
+ DECODE_PRINTF("POP\tDI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = pop_long();
+ } else {
+ M.x86.R_DI = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x60
+****************************************************************************/
+static void x86emuOp_push_all(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSHAD\n");
+ } else {
+ DECODE_PRINTF("PUSHA\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 old_sp = M.x86.R_ESP;
+
+ push_long(M.x86.R_EAX);
+ push_long(M.x86.R_ECX);
+ push_long(M.x86.R_EDX);
+ push_long(M.x86.R_EBX);
+ push_long(old_sp);
+ push_long(M.x86.R_EBP);
+ push_long(M.x86.R_ESI);
+ push_long(M.x86.R_EDI);
+ } else {
+ u16 old_sp = M.x86.R_SP;
+
+ push_word(M.x86.R_AX);
+ push_word(M.x86.R_CX);
+ push_word(M.x86.R_DX);
+ push_word(M.x86.R_BX);
+ push_word(old_sp);
+ push_word(M.x86.R_BP);
+ push_word(M.x86.R_SI);
+ push_word(M.x86.R_DI);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x61
+****************************************************************************/
+static void x86emuOp_pop_all(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POPAD\n");
+ } else {
+ DECODE_PRINTF("POPA\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = pop_long();
+ M.x86.R_ESI = pop_long();
+ M.x86.R_EBP = pop_long();
+ M.x86.R_ESP += 4; /* skip ESP */
+ M.x86.R_EBX = pop_long();
+ M.x86.R_EDX = pop_long();
+ M.x86.R_ECX = pop_long();
+ M.x86.R_EAX = pop_long();
+ } else {
+ M.x86.R_DI = pop_word();
+ M.x86.R_SI = pop_word();
+ M.x86.R_BP = pop_word();
+ M.x86.R_SP += 2; /* skip SP */
+ M.x86.R_BX = pop_word();
+ M.x86.R_DX = pop_word();
+ M.x86.R_CX = pop_word();
+ M.x86.R_AX = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/*opcode 0x62 ILLEGAL OP, calls x86emuOp_illegal_op() */
+/*opcode 0x63 ILLEGAL OP, calls x86emuOp_illegal_op() */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x64
+****************************************************************************/
+static void x86emuOp_segovr_FS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("FS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_FS;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x65
+****************************************************************************/
+static void x86emuOp_segovr_GS(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("GS:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_SEGOVR_GS;
+ /*
+ * note the lack of DECODE_CLEAR_SEGOVR(r) since, here is one of 4
+ * opcode subroutines we do not want to do this.
+ */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x66 - prefix for 32-bit register
+****************************************************************************/
+static void x86emuOp_prefix_data(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("DATA:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_DATA;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x67 - prefix for 32-bit address
+****************************************************************************/
+static void x86emuOp_prefix_addr(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("ADDR:\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_ADDR;
+ /* note no DECODE_CLEAR_SEGOVR here. */
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x68
+****************************************************************************/
+static void x86emuOp_push_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 imm;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ imm = fetch_long_imm();
+ } else {
+ imm = fetch_word_imm();
+ }
+ DECODE_PRINTF2("PUSH\t%x\n", imm);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(imm);
+ } else {
+ push_word((u16)imm);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x69
+****************************************************************************/
+static void x86emuOp_imul_word_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IMUL\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 res_lo,res_hi;
+ s32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg,*srcreg;
+ u32 res;
+ s16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ res = (s16)*srcreg * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6a
+****************************************************************************/
+static void x86emuOp_push_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ s16 imm;
+
+ START_OF_INSTR();
+ imm = (s8)fetch_byte_imm();
+ DECODE_PRINTF2("PUSH\t%d\n", imm);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long((s32)imm);
+ } else {
+ push_word(imm);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6b
+****************************************************************************/
+static void x86emuOp_imul_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+ s8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IMUL\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)srcval,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ res = (s16)srcval * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 res_lo,res_hi;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ TRACE_AND_STEP();
+ imul_long_direct(&res_lo,&res_hi,(s32)*srcreg,(s32)imm);
+ if (res_hi != 0) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u32)res_lo;
+ } else {
+ u16 *destreg,*srcreg;
+ u32 res;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%d\n", (s32)imm);
+ res = (s16)*srcreg * (s16)imm;
+ if (res > 0xFFFF) {
+ SET_FLAG(F_CF);
+ SET_FLAG(F_OF);
+ } else {
+ CLEAR_FLAG(F_CF);
+ CLEAR_FLAG(F_OF);
+ }
+ *destreg = (u16)res;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6c
+****************************************************************************/
+static void x86emuOp_ins_byte(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("INSB\n");
+ ins(1);
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6d
+****************************************************************************/
+static void x86emuOp_ins_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INSD\n");
+ ins(4);
+ } else {
+ DECODE_PRINTF("INSW\n");
+ ins(2);
+ }
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6e
+****************************************************************************/
+static void x86emuOp_outs_byte(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("OUTSB\n");
+ outs(1);
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x6f
+****************************************************************************/
+static void x86emuOp_outs_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("OUTSD\n");
+ outs(4);
+ } else {
+ DECODE_PRINTF("OUTSW\n");
+ outs(2);
+ }
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x70
+****************************************************************************/
+static void x86emuOp_jump_near_O(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if overflow flag is set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JO\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_OF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x71
+****************************************************************************/
+static void x86emuOp_jump_near_NO(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if overflow is not set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNO\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!ACCESS_FLAG(F_OF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x72
+****************************************************************************/
+static void x86emuOp_jump_near_B(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if carry flag is set. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JB\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_CF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x73
+****************************************************************************/
+static void x86emuOp_jump_near_NB(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if carry flag is clear. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNB\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!ACCESS_FLAG(F_CF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x74
+****************************************************************************/
+static void x86emuOp_jump_near_Z(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if zero flag is set. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JZ\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_ZF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x75
+****************************************************************************/
+static void x86emuOp_jump_near_NZ(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if zero flag is clear. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNZ\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!ACCESS_FLAG(F_ZF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x76
+****************************************************************************/
+static void x86emuOp_jump_near_BE(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if carry flag is set or if the zero
+ flag is set. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JBE\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x77
+****************************************************************************/
+static void x86emuOp_jump_near_NBE(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if carry flag is clear and if the zero
+ flag is clear */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNBE\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!(ACCESS_FLAG(F_CF) || ACCESS_FLAG(F_ZF)))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x78
+****************************************************************************/
+static void x86emuOp_jump_near_S(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if sign flag is set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JS\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_SF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x79
+****************************************************************************/
+static void x86emuOp_jump_near_NS(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if sign flag is clear */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNS\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!ACCESS_FLAG(F_SF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7a
+****************************************************************************/
+static void x86emuOp_jump_near_P(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if parity flag is set (even parity) */
+ START_OF_INSTR();
+ DECODE_PRINTF("JP\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_PF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7b
+****************************************************************************/
+static void x86emuOp_jump_near_NP(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+
+ /* jump to byte offset if parity flag is clear (odd parity) */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNP\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (!ACCESS_FLAG(F_PF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7c
+****************************************************************************/
+static void x86emuOp_jump_near_L(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+ int sf, of;
+
+ /* jump to byte offset if sign flag not equal to overflow flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JL\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ sf = ACCESS_FLAG(F_SF) != 0;
+ of = ACCESS_FLAG(F_OF) != 0;
+ if (sf ^ of)
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7d
+****************************************************************************/
+static void x86emuOp_jump_near_NL(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+ int sf, of;
+
+ /* jump to byte offset if sign flag not equal to overflow flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNL\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ sf = ACCESS_FLAG(F_SF) != 0;
+ of = ACCESS_FLAG(F_OF) != 0;
+ /* note: inverse of above, but using == instead of xor. */
+ if (sf == of)
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7e
+****************************************************************************/
+static void x86emuOp_jump_near_LE(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+ int sf, of;
+
+ /* jump to byte offset if sign flag not equal to overflow flag
+ or the zero flag is set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JLE\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ sf = ACCESS_FLAG(F_SF) != 0;
+ of = ACCESS_FLAG(F_OF) != 0;
+ if ((sf ^ of) || ACCESS_FLAG(F_ZF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x7f
+****************************************************************************/
+static void x86emuOp_jump_near_NLE(u8 X86EMU_UNUSED(op1))
+{
+ s8 offset;
+ u16 target;
+ int sf, of;
+
+ /* jump to byte offset if sign flag equal to overflow flag.
+ and the zero flag is clear */
+ START_OF_INSTR();
+ DECODE_PRINTF("JNLE\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + (s16)offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ sf = ACCESS_FLAG(F_SF) != 0;
+ of = ACCESS_FLAG(F_OF) != 0;
+ if ((sf == of) && !ACCESS_FLAG(F_ZF))
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+static u8 (*opc80_byte_operation[])(u8 d, u8 s) =
+{
+ add_byte, /* 00 */
+ or_byte, /* 01 */
+ adc_byte, /* 02 */
+ sbb_byte, /* 03 */
+ and_byte, /* 04 */
+ sub_byte, /* 05 */
+ xor_byte, /* 06 */
+ cmp_byte, /* 07 */
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x80
+****************************************************************************/
+static void x86emuOp_opc80_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+ u8 destval;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc80_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc80_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc80_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc80_byte_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+static u16 (*opc81_word_operation[])(u16 d, u16 s) =
+{
+ add_word, /*00 */
+ or_word, /*01 */
+ adc_word, /*02 */
+ sbb_word, /*03 */
+ and_word, /*04 */
+ sub_word, /*05 */
+ xor_word, /*06 */
+ cmp_word, /*07 */
+};
+
+static u32 (*opc81_long_operation[])(u32 d, u32 s) =
+{
+ add_long, /*00 */
+ or_long, /*01 */
+ adc_long, /*02 */
+ sbb_long, /*03 */
+ and_long, /*04 */
+ sub_long, /*05 */
+ xor_long, /*06 */
+ cmp_long, /*07 */
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x81
+****************************************************************************/
+static void x86emuOp_opc81_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /*
+ * Know operation, decode the mod byte to find the addressing
+ * mode.
+ */
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 destval,imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_long_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ } else {
+ u16 *destreg;
+ u16 destval,imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc81_word_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+static u8 (*opc82_byte_operation[])(u8 s, u8 d) =
+{
+ add_byte, /*00 */
+ or_byte, /*01 *//*YYY UNUSED ???? */
+ adc_byte, /*02 */
+ sbb_byte, /*03 */
+ and_byte, /*04 *//*YYY UNUSED ???? */
+ sub_byte, /*05 */
+ xor_byte, /*06 *//*YYY UNUSED ???? */
+ cmp_byte, /*07 */
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x82
+****************************************************************************/
+static void x86emuOp_opc82_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+ u8 destval;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction Similar to opcode 81, except that
+ * the immediate byte is sign extended to a word length.
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc82_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc82_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ destval = fetch_data_byte(destoffset);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc82_byte_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc82_byte_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+static u16 (*opc83_word_operation[])(u16 s, u16 d) =
+{
+ add_word, /*00 */
+ or_word, /*01 *//*YYY UNUSED ???? */
+ adc_word, /*02 */
+ sbb_word, /*03 */
+ and_word, /*04 *//*YYY UNUSED ???? */
+ sub_word, /*05 */
+ xor_word, /*06 *//*YYY UNUSED ???? */
+ cmp_word, /*07 */
+};
+
+static u32 (*opc83_long_operation[])(u32 s, u32 d) =
+{
+ add_long, /*00 */
+ or_long, /*01 *//*YYY UNUSED ???? */
+ adc_long, /*02 */
+ sbb_long, /*03 */
+ and_long, /*04 *//*YYY UNUSED ???? */
+ sub_long, /*05 */
+ xor_long, /*06 *//*YYY UNUSED ???? */
+ cmp_long, /*07 */
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x83
+****************************************************************************/
+static void x86emuOp_opc83_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Weirdo special case instruction format. Part of the opcode
+ * held below in "RH". Doubly nested case would result, except
+ * that the decoded instruction Similar to opcode 81, except that
+ * the immediate byte is sign extended to a word length.
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ADD\t");
+ break;
+ case 1:
+ DECODE_PRINTF("OR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("ADC\t");
+ break;
+ case 3:
+ DECODE_PRINTF("SBB\t");
+ break;
+ case 4:
+ DECODE_PRINTF("AND\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SUB\t");
+ break;
+ case 6:
+ DECODE_PRINTF("XOR\t");
+ break;
+ case 7:
+ DECODE_PRINTF("CMP\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ destval = fetch_data_long(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ destval = fetch_data_word(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ destval = fetch_data_long(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ destval = fetch_data_word(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ destval = fetch_data_long(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_long_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval,imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ destval = fetch_data_word(destoffset);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_word_operation[rh]) (destval, imm);
+ if (rh != 7)
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 destval,imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_long_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ } else {
+ u16 *destreg;
+ u16 destval,imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = (s8) fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ destval = (*opc83_word_operation[rh]) (*destreg, imm);
+ if (rh != 7)
+ *destreg = destval;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x84
+****************************************************************************/
+static void x86emuOp_test_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(destval, *srcreg);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(destval, *srcreg);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(destval, *srcreg);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_byte(*destreg, *srcreg);
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x85
+****************************************************************************/
+static void x86emuOp_test_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(destval, *srcreg);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(destval, *srcreg);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(destval, *srcreg);
+ } else {
+ u16 destval;
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(destval, *srcreg);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_long(*destreg, *srcreg);
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ test_word(*destreg, *srcreg);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x86
+****************************************************************************/
+static void x86emuOp_xchg_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+ u8 destval;
+ u8 tmp;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XCHG\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_byte(destoffset);
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x87
+****************************************************************************/
+static void x86emuOp_xchg_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XCHG\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ u32 destval,tmp;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_long(destoffset, destval);
+ } else {
+ u16 *srcreg;
+ u16 destval,tmp;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ u32 destval,tmp;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_long(destoffset, destval);
+ } else {
+ u16 *srcreg;
+ u16 destval,tmp;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+ u32 destval,tmp;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_long(destoffset);
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_long(destoffset, destval);
+ } else {
+ u16 *srcreg;
+ u16 destval,tmp;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ destval = fetch_data_word(destoffset);
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = destval;
+ destval = tmp;
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+ u32 tmp;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ } else {
+ u16 *destreg,*srcreg;
+ u16 tmp;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ tmp = *srcreg;
+ *srcreg = *destreg;
+ *destreg = tmp;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x88
+****************************************************************************/
+static void x86emuOp_mov_byte_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, *srcreg);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, *srcreg);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, *srcreg);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x89
+****************************************************************************/
+static void x86emuOp_mov_word_RM_R(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u32 destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_long(destoffset, *srcreg);
+ } else {
+ u16 *srcreg;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_word(destoffset, *srcreg);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_long(destoffset, *srcreg);
+ } else {
+ u16 *srcreg;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_word(destoffset, *srcreg);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_long(destoffset, *srcreg);
+ } else {
+ u16 *srcreg;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ store_data_word(destoffset, *srcreg);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg,*srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ } else {
+ u16 *destreg,*srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8a
+****************************************************************************/
+static void x86emuOp_mov_byte_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg, *srcreg;
+ uint srcoffset;
+ u8 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 1:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 2:
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_byte(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8b
+****************************************************************************/
+static void x86emuOp_mov_word_R_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_long(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg, *srcreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ } else {
+ u16 *destreg, *srcreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8c
+****************************************************************************/
+static void x86emuOp_mov_word_RM_SR(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *destreg, *srcreg;
+ uint destoffset;
+ u16 destval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = *srcreg;
+ store_data_word(destoffset, destval);
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = *srcreg;
+ store_data_word(destoffset, destval);
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = *srcreg;
+ store_data_word(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8d
+****************************************************************************/
+static void x86emuOp_lea_word_R_M(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *srcreg;
+ uint destoffset;
+
+/*
+ * TODO: Need to handle address size prefix!
+ *
+ * lea eax,[eax+ebx*2] ??
+ */
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LEA\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *srcreg = (u16)destoffset;
+ break;
+ case 1:
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *srcreg = (u16)destoffset;
+ break;
+ case 2:
+ srcreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *srcreg = (u16)destoffset;
+ break;
+ case 3: /* register to register */
+ /* undefined. Do nothing. */
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8e
+****************************************************************************/
+static void x86emuOp_mov_word_SR_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u16 *destreg, *srcreg;
+ uint srcoffset;
+ u16 srcval;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 1:
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 2:
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ srcval = fetch_data_word(srcoffset);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = srcval;
+ break;
+ case 3: /* register to register */
+ destreg = decode_rm_seg_register(rh);
+ DECODE_PRINTF(",");
+ srcreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = *srcreg;
+ break;
+ }
+ /*
+ * Clean up, and reset all the R_xSP pointers to the correct
+ * locations. This is about 3x too much overhead (doing all the
+ * segreg ptrs when only one is needed, but this instruction
+ * *cannot* be that common, and this isn't too much work anyway.
+ */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x8f
+****************************************************************************/
+static void x86emuOp_pop_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("POP\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ HALT_SYS();
+ }
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_long();
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_word();
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_long();
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_word();
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_long();
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ destval = pop_word();
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = pop_long();
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = pop_word();
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x90
+****************************************************************************/
+static void x86emuOp_nop(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("NOP\n");
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x91
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_CX(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,ECX\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,CX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_ECX;
+ M.x86.R_ECX = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_CX;
+ M.x86.R_CX = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x92
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_DX(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,EDX\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,DX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_EDX;
+ M.x86.R_EDX = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_DX;
+ M.x86.R_DX = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x93
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_BX(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,EBX\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,BX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_EBX;
+ M.x86.R_EBX = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_BX;
+ M.x86.R_BX = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x94
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_SP(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,ESP\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,SP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_ESP;
+ M.x86.R_ESP = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_SP;
+ M.x86.R_SP = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x95
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_BP(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,EBP\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,BP\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_EBP;
+ M.x86.R_EBP = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_BP;
+ M.x86.R_BP = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x96
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_SI(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,ESI\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,SI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_ESI;
+ M.x86.R_ESI = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_SI;
+ M.x86.R_SI = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x97
+****************************************************************************/
+static void x86emuOp_xchg_word_AX_DI(u8 X86EMU_UNUSED(op1))
+{
+ u32 tmp;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("XCHG\tEAX,EDI\n");
+ } else {
+ DECODE_PRINTF("XCHG\tAX,DI\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ tmp = M.x86.R_EAX;
+ M.x86.R_EAX = M.x86.R_EDI;
+ M.x86.R_EDI = tmp;
+ } else {
+ tmp = M.x86.R_AX;
+ M.x86.R_AX = M.x86.R_DI;
+ M.x86.R_DI = (u16)tmp;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x98
+****************************************************************************/
+static void x86emuOp_cbw(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CWDE\n");
+ } else {
+ DECODE_PRINTF("CBW\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ if (M.x86.R_AX & 0x8000) {
+ M.x86.R_EAX |= 0xffff0000;
+ } else {
+ M.x86.R_EAX &= 0x0000ffff;
+ }
+ } else {
+ if (M.x86.R_AL & 0x80) {
+ M.x86.R_AH = 0xff;
+ } else {
+ M.x86.R_AH = 0x0;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x99
+****************************************************************************/
+static void x86emuOp_cwd(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CDQ\n");
+ } else {
+ DECODE_PRINTF("CWD\n");
+ }
+ DECODE_PRINTF("CWD\n");
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ if (M.x86.R_EAX & 0x80000000) {
+ M.x86.R_EDX = 0xffffffff;
+ } else {
+ M.x86.R_EDX = 0x0;
+ }
+ } else {
+ if (M.x86.R_AX & 0x8000) {
+ M.x86.R_DX = 0xffff;
+ } else {
+ M.x86.R_DX = 0x0;
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9a
+****************************************************************************/
+static void x86emuOp_call_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 farseg, faroff;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CALL\t");
+ faroff = fetch_word_imm();
+ farseg = fetch_word_imm();
+ DECODE_PRINTF2("%04x:", farseg);
+ DECODE_PRINTF2("%04x\n", faroff);
+ CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, farseg, faroff, "FAR ");
+
+ /* XXX
+ *
+ * Hooked interrupt vectors calling into our "BIOS" will cause
+ * problems unless all intersegment stuff is checked for BIOS
+ * access. Check needed here. For moment, let it alone.
+ */
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = farseg;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = faroff;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9b
+****************************************************************************/
+static void x86emuOp_wait(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("WAIT");
+ TRACE_AND_STEP();
+ /* NADA. */
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9c
+****************************************************************************/
+static void x86emuOp_pushf_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 flags;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("PUSHFD\n");
+ } else {
+ DECODE_PRINTF("PUSHF\n");
+ }
+ TRACE_AND_STEP();
+
+ /* clear out *all* bits not representing flags, and turn on real bits */
+ flags = (M.x86.R_EFLG & F_MSK) | F_ALWAYS_ON;
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ push_long(flags);
+ } else {
+ push_word((u16)flags);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9d
+****************************************************************************/
+static void x86emuOp_popf_word(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("POPFD\n");
+ } else {
+ DECODE_PRINTF("POPF\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EFLG = pop_long();
+ } else {
+ M.x86.R_FLG = pop_word();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9e
+****************************************************************************/
+static void x86emuOp_sahf(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("SAHF\n");
+ TRACE_AND_STEP();
+ /* clear the lower bits of the flag register */
+ M.x86.R_FLG &= 0xffffff00;
+ /* or in the AH register into the flags register */
+ M.x86.R_FLG |= M.x86.R_AH;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0x9f
+****************************************************************************/
+static void x86emuOp_lahf(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LAHF\n");
+ TRACE_AND_STEP();
+ M.x86.R_AH = (u8)(M.x86.R_FLG & 0xff);
+ /*undocumented TC++ behavior??? Nope. It's documented, but
+ you have too look real hard to notice it. */
+ M.x86.R_AH |= 0x2;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa0
+****************************************************************************/
+static void x86emuOp_mov_AL_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tAL,");
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x]\n", offset);
+ TRACE_AND_STEP();
+ M.x86.R_AL = fetch_data_byte(offset);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa1
+****************************************************************************/
+static void x86emuOp_mov_AX_M_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ offset = fetch_word_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("MOV\tEAX,[%04x]\n", offset);
+ } else {
+ DECODE_PRINTF2("MOV\tAX,[%04x]\n", offset);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = fetch_data_long(offset);
+ } else {
+ M.x86.R_AX = fetch_data_word(offset);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa2
+****************************************************************************/
+static void x86emuOp_mov_M_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ offset = fetch_word_imm();
+ DECODE_PRINTF2("[%04x],AL\n", offset);
+ TRACE_AND_STEP();
+ store_data_byte(offset, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa3
+****************************************************************************/
+static void x86emuOp_mov_M_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 offset;
+
+ START_OF_INSTR();
+ offset = fetch_word_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("MOV\t[%04x],EAX\n", offset);
+ } else {
+ DECODE_PRINTF2("MOV\t[%04x],AX\n", offset);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ store_data_long(offset, M.x86.R_EAX);
+ } else {
+ store_data_word(offset, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa4
+****************************************************************************/
+static void x86emuOp_movs_byte(u8 X86EMU_UNUSED(op1))
+{
+ u8 val;
+ u32 count;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOVS\tBYTE\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ val = fetch_data_byte(M.x86.R_SI);
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, val);
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa5
+****************************************************************************/
+static void x86emuOp_movs_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 val;
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOVS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("MOVS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long(M.x86.R_SI);
+ store_data_long_abs(M.x86.R_ES, M.x86.R_DI, val);
+ } else {
+ val = fetch_data_word(M.x86.R_SI);
+ store_data_word_abs(M.x86.R_ES, M.x86.R_DI, (u16)val);
+ }
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa6
+****************************************************************************/
+static void x86emuOp_cmps_byte(u8 X86EMU_UNUSED(op1))
+{
+ s8 val1, val2;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CMPS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val1 = fetch_data_byte(M.x86.R_SI);
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(val1, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val1 = fetch_data_byte(M.x86.R_SI);
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(val1, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ val1 = fetch_data_byte(M.x86.R_SI);
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(val1, val2);
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa7
+****************************************************************************/
+static void x86emuOp_cmps_word(u8 X86EMU_UNUSED(op1))
+{
+ u32 val1,val2;
+ int inc;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("CMPS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("CMPS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val1 = fetch_data_long(M.x86.R_SI);
+ val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(val1, val2);
+ } else {
+ val1 = fetch_data_word(M.x86.R_SI);
+ val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word((u16)val1, (u16)val2);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val1 = fetch_data_long(M.x86.R_SI);
+ val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(val1, val2);
+ } else {
+ val1 = fetch_data_word(M.x86.R_SI);
+ val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word((u16)val1, (u16)val2);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val1 = fetch_data_long(M.x86.R_SI);
+ val2 = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(val1, val2);
+ } else {
+ val1 = fetch_data_word(M.x86.R_SI);
+ val2 = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word((u16)val1, (u16)val2);
+ }
+ M.x86.R_SI += inc;
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa8
+****************************************************************************/
+static void x86emuOp_test_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("TEST\tAL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%04x\n", imm);
+ TRACE_AND_STEP();
+ test_byte(M.x86.R_AL, (u8)imm);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xa9
+****************************************************************************/
+static void x86emuOp_test_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("TEST\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("TEST\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ test_long(M.x86.R_EAX, srcval);
+ } else {
+ test_word(M.x86.R_AX, (u16)srcval);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaa
+****************************************************************************/
+static void x86emuOp_stos_byte(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("STOS\tBYTE\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ TRACE_AND_STEP();
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ store_data_byte_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AL);
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xab
+****************************************************************************/
+static void x86emuOp_stos_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("STOS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("STOS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ store_data_long_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_EAX);
+ } else {
+ store_data_word_abs(M.x86.R_ES, M.x86.R_DI, M.x86.R_AX);
+ }
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xac
+****************************************************************************/
+static void x86emuOp_lods_byte(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LODS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+ M.x86.R_CX -= 1;
+ M.x86.R_SI += inc;
+ }
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ } else {
+ M.x86.R_AL = fetch_data_byte(M.x86.R_SI);
+ M.x86.R_SI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xad
+****************************************************************************/
+static void x86emuOp_lods_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 count;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("LODS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("LODS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ count = 1;
+ if (M.x86.mode & (SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE)) {
+ /* dont care whether REPE or REPNE */
+ /* move them until CX is ZERO. */
+ count = M.x86.R_CX;
+ M.x86.R_CX = 0;
+ M.x86.mode &= ~(SYSMODE_PREFIX_REPE | SYSMODE_PREFIX_REPNE);
+ }
+ while (count--) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = fetch_data_long(M.x86.R_SI);
+ } else {
+ M.x86.R_AX = fetch_data_word(M.x86.R_SI);
+ }
+ M.x86.R_SI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xae
+****************************************************************************/
+static void x86emuOp_scas_byte(u8 X86EMU_UNUSED(op1))
+{
+ s8 val2;
+ int inc;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("SCAS\tBYTE\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -1;
+ else
+ inc = 1;
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ val2 = fetch_data_byte_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_byte(M.x86.R_AL, val2);
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xaf
+****************************************************************************/
+static void x86emuOp_scas_word(u8 X86EMU_UNUSED(op1))
+{
+ int inc;
+ u32 val;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("SCAS\tDWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -4;
+ else
+ inc = 4;
+ } else {
+ DECODE_PRINTF("SCAS\tWORD\n");
+ if (ACCESS_FLAG(F_DF)) /* down */
+ inc = -2;
+ else
+ inc = 2;
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_REPE) {
+ /* REPE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF) == 0)
+ break;
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPE;
+ } else if (M.x86.mode & SYSMODE_PREFIX_REPNE) {
+ /* REPNE */
+ /* move them until CX is ZERO. */
+ while (M.x86.R_CX != 0) {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_CX -= 1;
+ M.x86.R_DI += inc;
+ if (ACCESS_FLAG(F_ZF))
+ break; /* zero flag set means equal */
+ }
+ M.x86.mode &= ~SYSMODE_PREFIX_REPNE;
+ } else {
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ val = fetch_data_long_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_long(M.x86.R_EAX, val);
+ } else {
+ val = fetch_data_word_abs(M.x86.R_ES, M.x86.R_DI);
+ cmp_word(M.x86.R_AX, (u16)val);
+ }
+ M.x86.R_DI += inc;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb0
+****************************************************************************/
+static void x86emuOp_mov_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tAL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_AL = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb1
+****************************************************************************/
+static void x86emuOp_mov_byte_CL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tCL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_CL = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb2
+****************************************************************************/
+static void x86emuOp_mov_byte_DL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tDL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_DL = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb3
+****************************************************************************/
+static void x86emuOp_mov_byte_BL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tBL,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_BL = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb4
+****************************************************************************/
+static void x86emuOp_mov_byte_AH_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tAH,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_AH = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb5
+****************************************************************************/
+static void x86emuOp_mov_byte_CH_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tCH,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_CH = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb6
+****************************************************************************/
+static void x86emuOp_mov_byte_DH_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tDH,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_DH = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb7
+****************************************************************************/
+static void x86emuOp_mov_byte_BH_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\tBH,");
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ TRACE_AND_STEP();
+ M.x86.R_BH = imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb8
+****************************************************************************/
+static void x86emuOp_mov_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tEAX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tAX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = srcval;
+ } else {
+ M.x86.R_AX = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xb9
+****************************************************************************/
+static void x86emuOp_mov_word_CX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tECX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tCX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ECX = srcval;
+ } else {
+ M.x86.R_CX = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xba
+****************************************************************************/
+static void x86emuOp_mov_word_DX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tEDX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tDX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDX = srcval;
+ } else {
+ M.x86.R_DX = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xbb
+****************************************************************************/
+static void x86emuOp_mov_word_BX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tEBX,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tBX,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBX = srcval;
+ } else {
+ M.x86.R_BX = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xbc
+****************************************************************************/
+static void x86emuOp_mov_word_SP_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tESP,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tSP,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESP = srcval;
+ } else {
+ M.x86.R_SP = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xbd
+****************************************************************************/
+static void x86emuOp_mov_word_BP_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tEBP,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tBP,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EBP = srcval;
+ } else {
+ M.x86.R_BP = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xbe
+****************************************************************************/
+static void x86emuOp_mov_word_SI_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tESI,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tSI,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_ESI = srcval;
+ } else {
+ M.x86.R_SI = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xbf
+****************************************************************************/
+static void x86emuOp_mov_word_DI_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u32 srcval;
+
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("MOV\tEDI,");
+ srcval = fetch_long_imm();
+ } else {
+ DECODE_PRINTF("MOV\tDI,");
+ srcval = fetch_word_imm();
+ }
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EDI = srcval;
+ } else {
+ M.x86.R_DI = (u16)srcval;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* used by opcodes c0, d0, and d2. */
+static u8(*opcD0_byte_operation[])(u8 d, u8 s) =
+{
+ rol_byte,
+ ror_byte,
+ rcl_byte,
+ rcr_byte,
+ shl_byte,
+ shr_byte,
+ shl_byte, /* sal_byte === shl_byte by definition */
+ sar_byte,
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc0
+****************************************************************************/
+static void x86emuOp_opcC0_byte_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+ *destreg = destval;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* used by opcodes c1, d1, and d3. */
+static u16(*opcD1_word_operation[])(u16 s, u8 d) =
+{
+ rol_word,
+ ror_word,
+ rcl_word,
+ rcr_word,
+ shl_word,
+ shr_word,
+ shl_word, /* sal_byte === shl_byte by definition */
+ sar_word,
+};
+
+/* used by opcodes c1, d1, and d3. */
+static u32 (*opcD1_long_operation[])(u32 s, u8 d) =
+{
+ rol_long,
+ ror_long,
+ rcl_long,
+ rcr_long,
+ shl_long,
+ shr_long,
+ shl_long, /* sal_byte === shl_byte by definition */
+ sar_long,
+};
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc1
+****************************************************************************/
+static void x86emuOp_opcC1_word_RM_MEM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ amt = fetch_byte_imm();
+ DECODE_PRINTF2(",%x\n", amt);
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc2
+****************************************************************************/
+static void x86emuOp_ret_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("RET\t");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_SP += imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc3
+****************************************************************************/
+static void x86emuOp_ret_near(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("RET\n");
+ RETURN_TRACE("RET",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc4
+****************************************************************************/
+static void x86emuOp_les_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LES\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_ES = fetch_data_word(srcoffset + 2);
+ break;
+ case 1:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_ES = fetch_data_word(srcoffset + 2);
+ break;
+ case 2:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_ES = fetch_data_word(srcoffset + 2);
+ break;
+ case 3: /* register to register */
+ /* UNDEFINED! */
+ TRACE_AND_STEP();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc5
+****************************************************************************/
+static void x86emuOp_lds_R_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u16 *dstreg;
+ uint srcoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LDS\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_DS = fetch_data_word(srcoffset + 2);
+ break;
+ case 1:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_DS = fetch_data_word(srcoffset + 2);
+ break;
+ case 2:
+ dstreg = DECODE_RM_WORD_REGISTER(rh);
+ DECODE_PRINTF(",");
+ srcoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *dstreg = fetch_data_word(srcoffset);
+ M.x86.R_DS = fetch_data_word(srcoffset + 2);
+ break;
+ case 3: /* register to register */
+ /* UNDEFINED! */
+ TRACE_AND_STEP();
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc6
+****************************************************************************/
+static void x86emuOp_mov_byte_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE c6\n");
+ HALT_SYS();
+ }
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, imm);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, imm);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ store_data_byte(destoffset, imm);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ imm = fetch_byte_imm();
+ DECODE_PRINTF2(",%2x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc7
+****************************************************************************/
+static void x86emuOp_mov_word_RM_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("MOV\t");
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ if (rh != 0) {
+ DECODE_PRINTF("ILLEGAL DECODE OF OPCODE 8F\n");
+ HALT_SYS();
+ }
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_long(destoffset, imm);
+ } else {
+ u16 imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_word(destoffset, imm);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_long(destoffset, imm);
+ } else {
+ u16 imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_word(destoffset, imm);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 imm;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_long(destoffset, imm);
+ } else {
+ u16 imm;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ store_data_word(destoffset, imm);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 imm;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ imm = fetch_long_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ } else {
+ u16 *destreg;
+ u16 imm;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ imm = fetch_word_imm();
+ DECODE_PRINTF2(",%x\n", imm);
+ TRACE_AND_STEP();
+ *destreg = imm;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc8
+****************************************************************************/
+static void x86emuOp_enter(u8 X86EMU_UNUSED(op1))
+{
+ u16 local,frame_pointer;
+ u8 nesting;
+ int i;
+
+ START_OF_INSTR();
+ local = fetch_word_imm();
+ nesting = fetch_byte_imm();
+ DECODE_PRINTF2("ENTER %x\n", local);
+ DECODE_PRINTF2(",%x\n", nesting);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_BP);
+ frame_pointer = M.x86.R_SP;
+ if (nesting > 0) {
+ for (i = 1; i < nesting; i++) {
+ M.x86.R_BP -= 2;
+ push_word(fetch_data_word_abs(M.x86.R_SS, M.x86.R_BP));
+ }
+ push_word(frame_pointer);
+ }
+ M.x86.R_BP = frame_pointer;
+ M.x86.R_SP = (u16)(M.x86.R_SP - local);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xc9
+****************************************************************************/
+static void x86emuOp_leave(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LEAVE\n");
+ TRACE_AND_STEP();
+ M.x86.R_SP = M.x86.R_BP;
+ M.x86.R_BP = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xca
+****************************************************************************/
+static void x86emuOp_ret_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 imm;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("RETF\t");
+ imm = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", imm);
+ RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ M.x86.R_SP += imm;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcb
+****************************************************************************/
+static void x86emuOp_ret_far(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("RETF\n");
+ RETURN_TRACE("RETF",M.x86.saved_cs,M.x86.saved_ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcc
+****************************************************************************/
+static void x86emuOp_int3(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("INT 3\n");
+ TRACE_AND_STEP();
+ if (_X86EMU_intrTab[3]) {
+ (*_X86EMU_intrTab[3])(3);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(3 * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(3 * 4);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcd
+****************************************************************************/
+static void x86emuOp_int_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 intnum;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("INT\t");
+ intnum = fetch_byte_imm();
+ DECODE_PRINTF2("%x\n", intnum);
+ TRACE_AND_STEP();
+ if (_X86EMU_intrTab[intnum]) {
+ (*_X86EMU_intrTab[intnum])(intnum);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(intnum * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(intnum * 4);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xce
+****************************************************************************/
+static void x86emuOp_into(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("INTO\n");
+ TRACE_AND_STEP();
+ if (ACCESS_FLAG(F_OF)) {
+ if (_X86EMU_intrTab[4]) {
+ (*_X86EMU_intrTab[4])(4);
+ } else {
+ push_word((u16)M.x86.R_FLG);
+ CLEAR_FLAG(F_IF);
+ CLEAR_FLAG(F_TF);
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = mem_access_word(4 * 4 + 2);
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = mem_access_word(4 * 4);
+ }
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xcf
+****************************************************************************/
+static void x86emuOp_iret(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("IRET\n");
+
+ TRACE_AND_STEP();
+
+ M.x86.R_IP = pop_word();
+ M.x86.R_CS = pop_word();
+ M.x86.R_FLG = pop_word();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd0
+****************************************************************************/
+static void x86emuOp_opcD0_byte_RM_1(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, 1);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, 1);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, 1);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd1
+****************************************************************************/
+static void x86emuOp_opcD1_word_RM_1(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, 1);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, 1);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, 1);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, 1);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, 1);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",1\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, 1);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ } else {
+ u16 destval;
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",1\n");
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (*destreg, 1);
+ *destreg = destval;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd2
+****************************************************************************/
+static void x86emuOp_opcD2_byte_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ amt = M.x86.R_CL;
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (destval, amt);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3: /* register to register */
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ destval = (*opcD0_byte_operation[rh]) (*destreg, amt);
+ *destreg = destval;
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd3
+****************************************************************************/
+static void x86emuOp_opcD3_word_RM_CL(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+ u8 amt;
+
+ /*
+ * Yet another weirdo special case instruction format. Part of
+ * the opcode held below in "RH". Doubly nested case would
+ * result, except that the decoded instruction
+ */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("ROL\t");
+ break;
+ case 1:
+ DECODE_PRINTF("ROR\t");
+ break;
+ case 2:
+ DECODE_PRINTF("RCL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("RCR\t");
+ break;
+ case 4:
+ DECODE_PRINTF("SHL\t");
+ break;
+ case 5:
+ DECODE_PRINTF("SHR\t");
+ break;
+ case 6:
+ DECODE_PRINTF("SAL\t");
+ break;
+ case 7:
+ DECODE_PRINTF("SAR\t");
+ break;
+ }
+ }
+#endif
+ /* know operation, decode the mod byte to find the addressing
+ mode. */
+ amt = M.x86.R_CL;
+ switch (mod) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_long_operation[rh]) (destval, amt);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("WORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",CL\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = (*opcD1_word_operation[rh]) (destval, amt);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3: /* register to register */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_long_operation[rh]) (*destreg, amt);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",CL\n");
+ TRACE_AND_STEP();
+ *destreg = (*opcD1_word_operation[rh]) (*destreg, amt);
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd4
+****************************************************************************/
+static void x86emuOp_aam(u8 X86EMU_UNUSED(op1))
+{
+ u8 a;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AAM\n");
+ a = fetch_byte_imm(); /* this is a stupid encoding. */
+ if (a != 10) {
+ /* fix: add base decoding
+ aam_word(u8 val, int base a) */
+ DECODE_PRINTF("ERROR DECODING AAM\n");
+ TRACE_REGS();
+ HALT_SYS();
+ }
+ TRACE_AND_STEP();
+ /* note the type change here --- returning AL and AH in AX. */
+ M.x86.R_AX = aam_word(M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd5
+****************************************************************************/
+static void x86emuOp_aad(u8 X86EMU_UNUSED(op1))
+{
+ u8 a;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("AAD\n");
+ a = fetch_byte_imm();
+ if (a != 10) {
+ /* fix: add base decoding
+ aad_word(u16 val, int base a) */
+ DECODE_PRINTF("ERROR DECODING AAM\n");
+ TRACE_REGS();
+ HALT_SYS();
+ }
+ TRACE_AND_STEP();
+ M.x86.R_AX = aad_word(M.x86.R_AX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* opcode 0xd6 ILLEGAL OPCODE */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xd7
+****************************************************************************/
+static void x86emuOp_xlat(u8 X86EMU_UNUSED(op1))
+{
+ u16 addr;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("XLAT\n");
+ TRACE_AND_STEP();
+ addr = (u16)(M.x86.R_BX + (u8)M.x86.R_AL);
+ M.x86.R_AL = fetch_data_byte(addr);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/* instuctions D8 .. DF are in i87_ops.c */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe0
+****************************************************************************/
+static void x86emuOp_loopne(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOPNE\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0 && !ACCESS_FLAG(F_ZF)) /* CX != 0 and !ZF */
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe1
+****************************************************************************/
+static void x86emuOp_loope(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOPE\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0 && ACCESS_FLAG(F_ZF)) /* CX != 0 and ZF */
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe2
+****************************************************************************/
+static void x86emuOp_loop(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("LOOP\t");
+ ip = (s8) fetch_byte_imm();
+ ip += (s16) M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_CX -= 1;
+ if (M.x86.R_CX != 0)
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe3
+****************************************************************************/
+static void x86emuOp_jcxz(u8 X86EMU_UNUSED(op1))
+{
+ u16 target;
+ s8 offset;
+
+ /* jump to byte offset if overflow flag is set */
+ START_OF_INSTR();
+ DECODE_PRINTF("JCXZ\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ if (M.x86.R_CX == 0)
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe4
+****************************************************************************/
+static void x86emuOp_in_byte_AL_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\t");
+ port = (u8) fetch_byte_imm();
+ DECODE_PRINTF2("%x,AL\n", port);
+ TRACE_AND_STEP();
+ M.x86.R_AL = (*sys_inb)(port);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe5
+****************************************************************************/
+static void x86emuOp_in_word_AX_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\t");
+ port = (u8) fetch_byte_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("EAX,%x\n", port);
+ } else {
+ DECODE_PRINTF2("AX,%x\n", port);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = (*sys_inl)(port);
+ } else {
+ M.x86.R_AX = (*sys_inw)(port);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe6
+****************************************************************************/
+static void x86emuOp_out_byte_IMM_AL(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\t");
+ port = (u8) fetch_byte_imm();
+ DECODE_PRINTF2("%x,AL\n", port);
+ TRACE_AND_STEP();
+ (*sys_outb)(port, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe7
+****************************************************************************/
+static void x86emuOp_out_word_IMM_AX(u8 X86EMU_UNUSED(op1))
+{
+ u8 port;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\t");
+ port = (u8) fetch_byte_imm();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF2("%x,EAX\n", port);
+ } else {
+ DECODE_PRINTF2("%x,AX\n", port);
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ (*sys_outl)(port, M.x86.R_EAX);
+ } else {
+ (*sys_outw)(port, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe8
+****************************************************************************/
+static void x86emuOp_call_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ s16 ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("CALL\t");
+ ip = (s16) fetch_word_imm();
+ ip += (s16) M.x86.R_IP; /* CHECK SIGN */
+ DECODE_PRINTF2("%04x\n", (u16)ip);
+ CALL_TRACE(M.x86.saved_cs, M.x86.saved_ip, M.x86.R_CS, ip, "");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xe9
+****************************************************************************/
+static void x86emuOp_jump_near_IMM(u8 X86EMU_UNUSED(op1))
+{
+ int ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\t");
+ ip = (s16)fetch_word_imm();
+ ip += (s16)M.x86.R_IP;
+ DECODE_PRINTF2("%04x\n", (u16)ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = (u16)ip;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xea
+****************************************************************************/
+static void x86emuOp_jump_far_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 cs, ip;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\tFAR ");
+ ip = fetch_word_imm();
+ cs = fetch_word_imm();
+ DECODE_PRINTF2("%04x:", cs);
+ DECODE_PRINTF2("%04x\n", ip);
+ TRACE_AND_STEP();
+ M.x86.R_IP = ip;
+ M.x86.R_CS = cs;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xeb
+****************************************************************************/
+static void x86emuOp_jump_byte_IMM(u8 X86EMU_UNUSED(op1))
+{
+ u16 target;
+ s8 offset;
+
+ START_OF_INSTR();
+ DECODE_PRINTF("JMP\t");
+ offset = (s8)fetch_byte_imm();
+ target = (u16)(M.x86.R_IP + offset);
+ DECODE_PRINTF2("%x\n", target);
+ TRACE_AND_STEP();
+ M.x86.R_IP = target;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xec
+****************************************************************************/
+static void x86emuOp_in_byte_AL_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("IN\tAL,DX\n");
+ TRACE_AND_STEP();
+ M.x86.R_AL = (*sys_inb)(M.x86.R_DX);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xed
+****************************************************************************/
+static void x86emuOp_in_word_AX_DX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("IN\tEAX,DX\n");
+ } else {
+ DECODE_PRINTF("IN\tAX,DX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ M.x86.R_EAX = (*sys_inl)(M.x86.R_DX);
+ } else {
+ M.x86.R_AX = (*sys_inw)(M.x86.R_DX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xee
+****************************************************************************/
+static void x86emuOp_out_byte_DX_AL(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("OUT\tDX,AL\n");
+ TRACE_AND_STEP();
+ (*sys_outb)(M.x86.R_DX, M.x86.R_AL);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xef
+****************************************************************************/
+static void x86emuOp_out_word_DX_AX(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("OUT\tDX,EAX\n");
+ } else {
+ DECODE_PRINTF("OUT\tDX,AX\n");
+ }
+ TRACE_AND_STEP();
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ (*sys_outl)(M.x86.R_DX, M.x86.R_EAX);
+ } else {
+ (*sys_outw)(M.x86.R_DX, M.x86.R_AX);
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf0
+****************************************************************************/
+static void x86emuOp_lock(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("LOCK:\n");
+ TRACE_AND_STEP();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/*opcode 0xf1 ILLEGAL OPERATION */
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf2
+****************************************************************************/
+static void x86emuOp_repne(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("REPNE\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_REPNE;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf3
+****************************************************************************/
+static void x86emuOp_repe(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("REPE\n");
+ TRACE_AND_STEP();
+ M.x86.mode |= SYSMODE_PREFIX_REPE;
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf4
+****************************************************************************/
+static void x86emuOp_halt(u8 X86EMU_UNUSED(op1))
+{
+ START_OF_INSTR();
+ DECODE_PRINTF("HALT\n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf5
+****************************************************************************/
+static void x86emuOp_cmc(u8 X86EMU_UNUSED(op1))
+{
+ /* complement the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CMC\n");
+ TRACE_AND_STEP();
+ TOGGLE_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf6
+****************************************************************************/
+static void x86emuOp_opcF6_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ u8 *destreg;
+ uint destoffset;
+ u8 destval, srcval;
+
+ /* long, drawn out code follows. Double switch for a total
+ of 32 cases. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0: /* mod=00 */
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF("TEST\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ test_byte(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("NOT\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = not_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("NEG\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("MUL\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ mul_byte(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("IMUL\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ imul_byte(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("DIV\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ div_byte(destval);
+ break;
+ case 7:
+ DECODE_PRINTF("IDIV\tBYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ idiv_byte(destval);
+ break;
+ }
+ break; /* end mod==00 */
+ case 1: /* mod=01 */
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF("TEST\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ test_byte(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=01 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("NOT\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = not_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("NEG\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("MUL\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ mul_byte(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("IMUL\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ imul_byte(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("DIV\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ div_byte(destval);
+ break;
+ case 7:
+ DECODE_PRINTF("IDIV\tBYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ idiv_byte(destval);
+ break;
+ }
+ break; /* end mod==01 */
+ case 2: /* mod=10 */
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF("TEST\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ test_byte(destval, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=10 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("NOT\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = not_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 3:
+ DECODE_PRINTF("NEG\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 4:
+ DECODE_PRINTF("MUL\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ mul_byte(destval);
+ break;
+ case 5:
+ DECODE_PRINTF("IMUL\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ imul_byte(destval);
+ break;
+ case 6:
+ DECODE_PRINTF("DIV\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ div_byte(destval);
+ break;
+ case 7:
+ DECODE_PRINTF("IDIV\tBYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ idiv_byte(destval);
+ break;
+ }
+ break; /* end mod==10 */
+ case 3: /* mod=11 */
+ switch (rh) {
+ case 0: /* test byte imm */
+ DECODE_PRINTF("TEST\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_byte_imm();
+ DECODE_PRINTF2("%02x\n", srcval);
+ TRACE_AND_STEP();
+ test_byte(*destreg, srcval);
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ DECODE_PRINTF("NOT\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_byte(*destreg);
+ break;
+ case 3:
+ DECODE_PRINTF("NEG\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_byte(*destreg);
+ break;
+ case 4:
+ DECODE_PRINTF("MUL\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_byte(*destreg); /*!!! */
+ break;
+ case 5:
+ DECODE_PRINTF("IMUL\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_byte(*destreg);
+ break;
+ case 6:
+ DECODE_PRINTF("DIV\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_byte(*destreg);
+ break;
+ case 7:
+ DECODE_PRINTF("IDIV\t");
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_byte(*destreg);
+ break;
+ }
+ break; /* end mod==11 */
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf7
+****************************************************************************/
+static void x86emuOp_opcF7_word_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rl, rh;
+ uint destoffset;
+
+ /* long, drawn out code follows. Double switch for a total
+ of 32 cases. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+ switch (mod) {
+ case 0: /* mod=00 */
+ switch (rh) {
+ case 0: /* test word imm */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,srcval;
+
+ DECODE_PRINTF("TEST\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ test_long(destval, srcval);
+ } else {
+ u16 destval,srcval;
+
+ DECODE_PRINTF("TEST\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ test_word(destval, srcval);
+ }
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F7\n");
+ HALT_SYS();
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NOT\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = not_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NOT\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = not_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NEG\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NEG\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 4:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("MUL\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ mul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("MUL\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ mul_word(destval);
+ }
+ break;
+ case 5:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IMUL\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ imul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IMUL\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ imul_word(destval);
+ }
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DIV\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ div_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("DIV\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ div_word(destval);
+ }
+ break;
+ case 7:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IDIV\tDWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ idiv_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IDIV\tWORD PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ idiv_word(destval);
+ }
+ break;
+ }
+ break; /* end mod==00 */
+ case 1: /* mod=01 */
+ switch (rh) {
+ case 0: /* test word imm */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,srcval;
+
+ DECODE_PRINTF("TEST\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ test_long(destval, srcval);
+ } else {
+ u16 destval,srcval;
+
+ DECODE_PRINTF("TEST\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ test_word(destval, srcval);
+ }
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=01 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NOT\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = not_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NOT\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = not_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NEG\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NEG\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 4:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("MUL\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ mul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("MUL\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ mul_word(destval);
+ }
+ break;
+ case 5:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IMUL\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ imul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IMUL\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ imul_word(destval);
+ }
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DIV\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ div_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("DIV\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ div_word(destval);
+ }
+ break;
+ case 7:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IDIV\tDWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ idiv_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IDIV\tWORD PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ idiv_word(destval);
+ }
+ break;
+ }
+ break; /* end mod==01 */
+ case 2: /* mod=10 */
+ switch (rh) {
+ case 0: /* test word imm */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval,srcval;
+
+ DECODE_PRINTF("TEST\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ test_long(destval, srcval);
+ } else {
+ u16 destval,srcval;
+
+ DECODE_PRINTF("TEST\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ test_word(destval, srcval);
+ }
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=10 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NOT\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = not_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NOT\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = not_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 3:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("NEG\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("NEG\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = neg_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 4:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("MUL\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ mul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("MUL\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ mul_word(destval);
+ }
+ break;
+ case 5:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IMUL\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ imul_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IMUL\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ imul_word(destval);
+ }
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("DIV\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ div_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("DIV\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ div_word(destval);
+ }
+ break;
+ case 7:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ DECODE_PRINTF("IDIV\tDWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ idiv_long(destval);
+ } else {
+ u16 destval;
+
+ DECODE_PRINTF("IDIV\tWORD PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ idiv_word(destval);
+ }
+ break;
+ }
+ break; /* end mod==10 */
+ case 3: /* mod=11 */
+ switch (rh) {
+ case 0: /* test word imm */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+ u32 srcval;
+
+ DECODE_PRINTF("TEST\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_long_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_long(*destreg, srcval);
+ } else {
+ u16 *destreg;
+ u16 srcval;
+
+ DECODE_PRINTF("TEST\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF(",");
+ srcval = fetch_word_imm();
+ DECODE_PRINTF2("%x\n", srcval);
+ TRACE_AND_STEP();
+ test_word(*destreg, srcval);
+ }
+ break;
+ case 1:
+ DECODE_PRINTF("ILLEGAL OP MOD=00 RH=01 OP=F6\n");
+ HALT_SYS();
+ break;
+ case 2:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("NOT\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("NOT\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = not_word(*destreg);
+ }
+ break;
+ case 3:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("NEG\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("NEG\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = neg_word(*destreg);
+ }
+ break;
+ case 4:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("MUL\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_long(*destreg); /*!!! */
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("MUL\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ mul_word(*destreg); /*!!! */
+ }
+ break;
+ case 5:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("IMUL\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("IMUL\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ imul_word(*destreg);
+ }
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("DIV\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("DIV\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ div_word(*destreg);
+ }
+ break;
+ case 7:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ DECODE_PRINTF("IDIV\t");
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ DECODE_PRINTF("IDIV\t");
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ idiv_word(*destreg);
+ }
+ break;
+ }
+ break; /* end mod==11 */
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf8
+****************************************************************************/
+static void x86emuOp_clc(u8 X86EMU_UNUSED(op1))
+{
+ /* clear the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLC\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xf9
+****************************************************************************/
+static void x86emuOp_stc(u8 X86EMU_UNUSED(op1))
+{
+ /* set the carry flag. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STC\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_CF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfa
+****************************************************************************/
+static void x86emuOp_cli(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLI\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_IF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfb
+****************************************************************************/
+static void x86emuOp_sti(u8 X86EMU_UNUSED(op1))
+{
+ /* enable interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STI\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_IF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfc
+****************************************************************************/
+static void x86emuOp_cld(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("CLD\n");
+ TRACE_AND_STEP();
+ CLEAR_FLAG(F_DF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfd
+****************************************************************************/
+static void x86emuOp_std(u8 X86EMU_UNUSED(op1))
+{
+ /* clear interrupts. */
+ START_OF_INSTR();
+ DECODE_PRINTF("STD\n");
+ TRACE_AND_STEP();
+ SET_FLAG(F_DF);
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xfe
+****************************************************************************/
+static void x86emuOp_opcFE_byte_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ u8 destval;
+ uint destoffset;
+ u8 *destreg;
+
+ /* Yet another special case instruction. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ DECODE_PRINTF("INC\t");
+ break;
+ case 1:
+ DECODE_PRINTF("DEC\t");
+ break;
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ case 6:
+ case 7:
+ DECODE_PRINTF2("ILLEGAL OP MAJOR OP 0xFE MINOR OP %x \n", mod);
+ HALT_SYS();
+ break;
+ }
+ }
+#endif
+ switch (mod) {
+ case 0:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0: /* inc word ptr ... */
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1: /* dec word ptr ... */
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ }
+ break;
+ case 1:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0:
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ }
+ break;
+ case 2:
+ DECODE_PRINTF("BYTE PTR ");
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0:
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ case 1:
+ destval = fetch_data_byte(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_byte(destval);
+ store_data_byte(destoffset, destval);
+ break;
+ }
+ break;
+ case 3:
+ destreg = DECODE_RM_BYTE_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0:
+ TRACE_AND_STEP();
+ *destreg = inc_byte(*destreg);
+ break;
+ case 1:
+ TRACE_AND_STEP();
+ *destreg = dec_byte(*destreg);
+ break;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/****************************************************************************
+REMARKS:
+Handles opcode 0xff
+****************************************************************************/
+static void x86emuOp_opcFF_word_RM(u8 X86EMU_UNUSED(op1))
+{
+ int mod, rh, rl;
+ uint destoffset = 0;
+ u16 *destreg;
+ u16 destval,destval2;
+
+ /* Yet another special case instruction. */
+ START_OF_INSTR();
+ FETCH_DECODE_MODRM(mod, rh, rl);
+#ifdef DEBUG
+ if (DEBUG_DECODE()) {
+ /* XXX DECODE_PRINTF may be changed to something more
+ general, so that it is important to leave the strings
+ in the same format, even though the result is that the
+ above test is done twice. */
+
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("INC\tDWORD PTR ");
+ } else {
+ DECODE_PRINTF("INC\tWORD PTR ");
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ DECODE_PRINTF("DEC\tDWORD PTR ");
+ } else {
+ DECODE_PRINTF("DEC\tWORD PTR ");
+ }
+ break;
+ case 2:
+ DECODE_PRINTF("CALL\t");
+ break;
+ case 3:
+ DECODE_PRINTF("CALL\tFAR ");
+ break;
+ case 4:
+ DECODE_PRINTF("JMP\t");
+ break;
+ case 5:
+ DECODE_PRINTF("JMP\tFAR ");
+ break;
+ case 6:
+ DECODE_PRINTF("PUSH\t");
+ break;
+ case 7:
+ DECODE_PRINTF("ILLEGAL DECODING OF OPCODE FF\t");
+ HALT_SYS();
+ break;
+ }
+ }
+#endif
+ switch (mod) {
+ case 0:
+ destoffset = decode_rm00_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0: /* inc word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1: /* dec word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 3: /* call far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = destval2;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 4: /* jmp word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ break;
+ case 5: /* jmp far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ M.x86.R_CS = destval2;
+ break;
+ case 6: /* push word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ push_long(destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(destval);
+ }
+ break;
+ }
+ break;
+ case 1:
+ destoffset = decode_rm01_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 3: /* call far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = destval2;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 4: /* jmp word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ break;
+ case 5: /* jmp far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ M.x86.R_CS = destval2;
+ break;
+ case 6: /* push word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ push_long(destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(destval);
+ }
+ break;
+ }
+ break;
+ case 2:
+ destoffset = decode_rm10_address(rl);
+ DECODE_PRINTF("\n");
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = inc_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_long(destval);
+ store_data_long(destoffset, destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ destval = dec_word(destval);
+ store_data_word(destoffset, destval);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 3: /* call far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ push_word(M.x86.R_CS);
+ M.x86.R_CS = destval2;
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = destval;
+ break;
+ case 4: /* jmp word ptr ... */
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ break;
+ case 5: /* jmp far ptr ... */
+ destval = fetch_data_word(destoffset);
+ destval2 = fetch_data_word(destoffset + 2);
+ TRACE_AND_STEP();
+ M.x86.R_IP = destval;
+ M.x86.R_CS = destval2;
+ break;
+ case 6: /* push word ptr ... */
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 destval;
+
+ destval = fetch_data_long(destoffset);
+ TRACE_AND_STEP();
+ push_long(destval);
+ } else {
+ u16 destval;
+
+ destval = fetch_data_word(destoffset);
+ TRACE_AND_STEP();
+ push_word(destval);
+ }
+ break;
+ }
+ break;
+ case 3:
+ switch (rh) {
+ case 0:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = inc_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = inc_word(*destreg);
+ }
+ break;
+ case 1:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = dec_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ *destreg = dec_word(*destreg);
+ }
+ break;
+ case 2: /* call word ptr ... */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_word(M.x86.R_IP);
+ M.x86.R_IP = *destreg;
+ break;
+ case 3: /* jmp far ptr ... */
+ DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ break;
+
+ case 4: /* jmp ... */
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ M.x86.R_IP = (u16) (*destreg);
+ break;
+ case 5: /* jmp far ptr ... */
+ DECODE_PRINTF("OPERATION UNDEFINED 0XFF \n");
+ TRACE_AND_STEP();
+ HALT_SYS();
+ break;
+ case 6:
+ if (M.x86.mode & SYSMODE_PREFIX_DATA) {
+ u32 *destreg;
+
+ destreg = DECODE_RM_LONG_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_long(*destreg);
+ } else {
+ u16 *destreg;
+
+ destreg = DECODE_RM_WORD_REGISTER(rl);
+ DECODE_PRINTF("\n");
+ TRACE_AND_STEP();
+ push_word(*destreg);
+ }
+ break;
+ }
+ break;
+ }
+ DECODE_CLEAR_SEGOVR();
+ END_OF_INSTR();
+}
+
+/***************************************************************************
+ * Single byte operation code table:
+ **************************************************************************/
+void (*x86emu_optab[256])(u8) =
+{
+/* 0x00 */ x86emuOp_add_byte_RM_R,
+/* 0x01 */ x86emuOp_add_word_RM_R,
+/* 0x02 */ x86emuOp_add_byte_R_RM,
+/* 0x03 */ x86emuOp_add_word_R_RM,
+/* 0x04 */ x86emuOp_add_byte_AL_IMM,
+/* 0x05 */ x86emuOp_add_word_AX_IMM,
+/* 0x06 */ x86emuOp_push_ES,
+/* 0x07 */ x86emuOp_pop_ES,
+
+/* 0x08 */ x86emuOp_or_byte_RM_R,
+/* 0x09 */ x86emuOp_or_word_RM_R,
+/* 0x0a */ x86emuOp_or_byte_R_RM,
+/* 0x0b */ x86emuOp_or_word_R_RM,
+/* 0x0c */ x86emuOp_or_byte_AL_IMM,
+/* 0x0d */ x86emuOp_or_word_AX_IMM,
+/* 0x0e */ x86emuOp_push_CS,
+/* 0x0f */ x86emuOp_two_byte,
+
+/* 0x10 */ x86emuOp_adc_byte_RM_R,
+/* 0x11 */ x86emuOp_adc_word_RM_R,
+/* 0x12 */ x86emuOp_adc_byte_R_RM,
+/* 0x13 */ x86emuOp_adc_word_R_RM,
+/* 0x14 */ x86emuOp_adc_byte_AL_IMM,
+/* 0x15 */ x86emuOp_adc_word_AX_IMM,
+/* 0x16 */ x86emuOp_push_SS,
+/* 0x17 */ x86emuOp_pop_SS,
+
+/* 0x18 */ x86emuOp_sbb_byte_RM_R,
+/* 0x19 */ x86emuOp_sbb_word_RM_R,
+/* 0x1a */ x86emuOp_sbb_byte_R_RM,
+/* 0x1b */ x86emuOp_sbb_word_R_RM,
+/* 0x1c */ x86emuOp_sbb_byte_AL_IMM,
+/* 0x1d */ x86emuOp_sbb_word_AX_IMM,
+/* 0x1e */ x86emuOp_push_DS,
+/* 0x1f */ x86emuOp_pop_DS,
+
+/* 0x20 */ x86emuOp_and_byte_RM_R,
+/* 0x21 */ x86emuOp_and_word_RM_R,
+/* 0x22 */ x86emuOp_and_byte_R_RM,
+/* 0x23 */ x86emuOp_and_word_R_RM,
+/* 0x24 */ x86emuOp_and_byte_AL_IMM,
+/* 0x25 */ x86emuOp_and_word_AX_IMM,
+/* 0x26 */ x86emuOp_segovr_ES,
+/* 0x27 */ x86emuOp_daa,
+
+/* 0x28 */ x86emuOp_sub_byte_RM_R,
+/* 0x29 */ x86emuOp_sub_word_RM_R,
+/* 0x2a */ x86emuOp_sub_byte_R_RM,
+/* 0x2b */ x86emuOp_sub_word_R_RM,
+/* 0x2c */ x86emuOp_sub_byte_AL_IMM,
+/* 0x2d */ x86emuOp_sub_word_AX_IMM,
+/* 0x2e */ x86emuOp_segovr_CS,
+/* 0x2f */ x86emuOp_das,
+
+/* 0x30 */ x86emuOp_xor_byte_RM_R,
+/* 0x31 */ x86emuOp_xor_word_RM_R,
+/* 0x32 */ x86emuOp_xor_byte_R_RM,
+/* 0x33 */ x86emuOp_xor_word_R_RM,
+/* 0x34 */ x86emuOp_xor_byte_AL_IMM,
+/* 0x35 */ x86emuOp_xor_word_AX_IMM,
+/* 0x36 */ x86emuOp_segovr_SS,
+/* 0x37 */ x86emuOp_aaa,
+
+/* 0x38 */ x86emuOp_cmp_byte_RM_R,
+/* 0x39 */ x86emuOp_cmp_word_RM_R,
+/* 0x3a */ x86emuOp_cmp_byte_R_RM,
+/* 0x3b */ x86emuOp_cmp_word_R_RM,
+/* 0x3c */ x86emuOp_cmp_byte_AL_IMM,
+/* 0x3d */ x86emuOp_cmp_word_AX_IMM,
+/* 0x3e */ x86emuOp_segovr_DS,
+/* 0x3f */ x86emuOp_aas,
+
+/* 0x40 */ x86emuOp_inc_AX,
+/* 0x41 */ x86emuOp_inc_CX,
+/* 0x42 */ x86emuOp_inc_DX,
+/* 0x43 */ x86emuOp_inc_BX,
+/* 0x44 */ x86emuOp_inc_SP,
+/* 0x45 */ x86emuOp_inc_BP,
+/* 0x46 */ x86emuOp_inc_SI,
+/* 0x47 */ x86emuOp_inc_DI,
+
+/* 0x48 */ x86emuOp_dec_AX,
+/* 0x49 */ x86emuOp_dec_CX,
+/* 0x4a */ x86emuOp_dec_DX,
+/* 0x4b */ x86emuOp_dec_BX,
+/* 0x4c */ x86emuOp_dec_SP,
+/* 0x4d */ x86emuOp_dec_BP,
+/* 0x4e */ x86emuOp_dec_SI,
+/* 0x4f */ x86emuOp_dec_DI,
+
+/* 0x50 */ x86emuOp_push_AX,
+/* 0x51 */ x86emuOp_push_CX,
+/* 0x52 */ x86emuOp_push_DX,
+/* 0x53 */ x86emuOp_push_BX,
+/* 0x54 */ x86emuOp_push_SP,
+/* 0x55 */ x86emuOp_push_BP,
+/* 0x56 */ x86emuOp_push_SI,
+/* 0x57 */ x86emuOp_push_DI,
+
+/* 0x58 */ x86emuOp_pop_AX,
+/* 0x59 */ x86emuOp_pop_CX,
+/* 0x5a */ x86emuOp_pop_DX,
+/* 0x5b */ x86emuOp_pop_BX,
+/* 0x5c */ x86emuOp_pop_SP,
+/* 0x5d */ x86emuOp_pop_BP,
+/* 0x5e */ x86emuOp_pop_SI,
+/* 0x5f */ x86emuOp_pop_DI,
+
+/* 0x60 */ x86emuOp_push_all,
+/* 0x61 */ x86emuOp_pop_all,
+/* 0x62 */ x86emuOp_illegal_op, /* bound */
+/* 0x63 */ x86emuOp_illegal_op, /* arpl */
+/* 0x64 */ x86emuOp_segovr_FS,
+/* 0x65 */ x86emuOp_segovr_GS,
+/* 0x66 */ x86emuOp_prefix_data,
+/* 0x67 */ x86emuOp_prefix_addr,
+
+/* 0x68 */ x86emuOp_push_word_IMM,
+/* 0x69 */ x86emuOp_imul_word_IMM,
+/* 0x6a */ x86emuOp_push_byte_IMM,
+/* 0x6b */ x86emuOp_imul_byte_IMM,
+/* 0x6c */ x86emuOp_ins_byte,
+/* 0x6d */ x86emuOp_ins_word,
+/* 0x6e */ x86emuOp_outs_byte,
+/* 0x6f */ x86emuOp_outs_word,
+
+/* 0x70 */ x86emuOp_jump_near_O,
+/* 0x71 */ x86emuOp_jump_near_NO,
+/* 0x72 */ x86emuOp_jump_near_B,
+/* 0x73 */ x86emuOp_jump_near_NB,
+/* 0x74 */ x86emuOp_jump_near_Z,
+/* 0x75 */ x86emuOp_jump_near_NZ,
+/* 0x76 */ x86emuOp_jump_near_BE,
+/* 0x77 */ x86emuOp_jump_near_NBE,
+
+/* 0x78 */ x86emuOp_jump_near_S,
+/* 0x79 */ x86emuOp_jump_near_NS,
+/* 0x7a */ x86emuOp_jump_near_P,
+/* 0x7b */ x86emuOp_jump_near_NP,
+/* 0x7c */ x86emuOp_jump_near_L,
+/* 0x7d */ x86emuOp_jump_near_NL,
+/* 0x7e */ x86emuOp_jump_near_LE,
+/* 0x7f */ x86emuOp_jump_near_NLE,
+
+/* 0x80 */ x86emuOp_opc80_byte_RM_IMM,
+/* 0x81 */ x86emuOp_opc81_word_RM_IMM,
+/* 0x82 */ x86emuOp_opc82_byte_RM_IMM,
+/* 0x83 */ x86emuOp_opc83_word_RM_IMM,
+/* 0x84 */ x86emuOp_test_byte_RM_R,
+/* 0x85 */ x86emuOp_test_word_RM_R,
+/* 0x86 */ x86emuOp_xchg_byte_RM_R,
+/* 0x87 */ x86emuOp_xchg_word_RM_R,
+
+/* 0x88 */ x86emuOp_mov_byte_RM_R,
+/* 0x89 */ x86emuOp_mov_word_RM_R,
+/* 0x8a */ x86emuOp_mov_byte_R_RM,
+/* 0x8b */ x86emuOp_mov_word_R_RM,
+/* 0x8c */ x86emuOp_mov_word_RM_SR,
+/* 0x8d */ x86emuOp_lea_word_R_M,
+/* 0x8e */ x86emuOp_mov_word_SR_RM,
+/* 0x8f */ x86emuOp_pop_RM,
+
+/* 0x90 */ x86emuOp_nop,
+/* 0x91 */ x86emuOp_xchg_word_AX_CX,
+/* 0x92 */ x86emuOp_xchg_word_AX_DX,
+/* 0x93 */ x86emuOp_xchg_word_AX_BX,
+/* 0x94 */ x86emuOp_xchg_word_AX_SP,
+/* 0x95 */ x86emuOp_xchg_word_AX_BP,
+/* 0x96 */ x86emuOp_xchg_word_AX_SI,
+/* 0x97 */ x86emuOp_xchg_word_AX_DI,
+
+/* 0x98 */ x86emuOp_cbw,
+/* 0x99 */ x86emuOp_cwd,
+/* 0x9a */ x86emuOp_call_far_IMM,
+/* 0x9b */ x86emuOp_wait,
+/* 0x9c */ x86emuOp_pushf_word,
+/* 0x9d */ x86emuOp_popf_word,
+/* 0x9e */ x86emuOp_sahf,
+/* 0x9f */ x86emuOp_lahf,
+
+/* 0xa0 */ x86emuOp_mov_AL_M_IMM,
+/* 0xa1 */ x86emuOp_mov_AX_M_IMM,
+/* 0xa2 */ x86emuOp_mov_M_AL_IMM,
+/* 0xa3 */ x86emuOp_mov_M_AX_IMM,
+/* 0xa4 */ x86emuOp_movs_byte,
+/* 0xa5 */ x86emuOp_movs_word,
+/* 0xa6 */ x86emuOp_cmps_byte,
+/* 0xa7 */ x86emuOp_cmps_word,
+/* 0xa8 */ x86emuOp_test_AL_IMM,
+/* 0xa9 */ x86emuOp_test_AX_IMM,
+/* 0xaa */ x86emuOp_stos_byte,
+/* 0xab */ x86emuOp_stos_word,
+/* 0xac */ x86emuOp_lods_byte,
+/* 0xad */ x86emuOp_lods_word,
+/* 0xac */ x86emuOp_scas_byte,
+/* 0xad */ x86emuOp_scas_word,
+
+
+/* 0xb0 */ x86emuOp_mov_byte_AL_IMM,
+/* 0xb1 */ x86emuOp_mov_byte_CL_IMM,
+/* 0xb2 */ x86emuOp_mov_byte_DL_IMM,
+/* 0xb3 */ x86emuOp_mov_byte_BL_IMM,
+/* 0xb4 */ x86emuOp_mov_byte_AH_IMM,
+/* 0xb5 */ x86emuOp_mov_byte_CH_IMM,
+/* 0xb6 */ x86emuOp_mov_byte_DH_IMM,
+/* 0xb7 */ x86emuOp_mov_byte_BH_IMM,
+
+/* 0xb8 */ x86emuOp_mov_word_AX_IMM,
+/* 0xb9 */ x86emuOp_mov_word_CX_IMM,
+/* 0xba */ x86emuOp_mov_word_DX_IMM,
+/* 0xbb */ x86emuOp_mov_word_BX_IMM,
+/* 0xbc */ x86emuOp_mov_word_SP_IMM,
+/* 0xbd */ x86emuOp_mov_word_BP_IMM,
+/* 0xbe */ x86emuOp_mov_word_SI_IMM,
+/* 0xbf */ x86emuOp_mov_word_DI_IMM,
+
+/* 0xc0 */ x86emuOp_opcC0_byte_RM_MEM,
+/* 0xc1 */ x86emuOp_opcC1_word_RM_MEM,
+/* 0xc2 */ x86emuOp_ret_near_IMM,
+/* 0xc3 */ x86emuOp_ret_near,
+/* 0xc4 */ x86emuOp_les_R_IMM,
+/* 0xc5 */ x86emuOp_lds_R_IMM,
+/* 0xc6 */ x86emuOp_mov_byte_RM_IMM,
+/* 0xc7 */ x86emuOp_mov_word_RM_IMM,
+/* 0xc8 */ x86emuOp_enter,
+/* 0xc9 */ x86emuOp_leave,
+/* 0xca */ x86emuOp_ret_far_IMM,
+/* 0xcb */ x86emuOp_ret_far,
+/* 0xcc */ x86emuOp_int3,
+/* 0xcd */ x86emuOp_int_IMM,
+/* 0xce */ x86emuOp_into,
+/* 0xcf */ x86emuOp_iret,
+
+/* 0xd0 */ x86emuOp_opcD0_byte_RM_1,
+/* 0xd1 */ x86emuOp_opcD1_word_RM_1,
+/* 0xd2 */ x86emuOp_opcD2_byte_RM_CL,
+/* 0xd3 */ x86emuOp_opcD3_word_RM_CL,
+/* 0xd4 */ x86emuOp_aam,
+/* 0xd5 */ x86emuOp_aad,
+/* 0xd6 */ x86emuOp_illegal_op, /* Undocumented SETALC instruction */
+/* 0xd7 */ x86emuOp_xlat,
+/* 0xd8 */ x86emuOp_esc_coprocess_d8,
+/* 0xd9 */ x86emuOp_esc_coprocess_d9,
+/* 0xda */ x86emuOp_esc_coprocess_da,
+/* 0xdb */ x86emuOp_esc_coprocess_db,
+/* 0xdc */ x86emuOp_esc_coprocess_dc,
+/* 0xdd */ x86emuOp_esc_coprocess_dd,
+/* 0xde */ x86emuOp_esc_coprocess_de,
+/* 0xdf */ x86emuOp_esc_coprocess_df,
+
+/* 0xe0 */ x86emuOp_loopne,
+/* 0xe1 */ x86emuOp_loope,
+/* 0xe2 */ x86emuOp_loop,
+/* 0xe3 */ x86emuOp_jcxz,
+/* 0xe4 */ x86emuOp_in_byte_AL_IMM,
+/* 0xe5 */ x86emuOp_in_word_AX_IMM,
+/* 0xe6 */ x86emuOp_out_byte_IMM_AL,
+/* 0xe7 */ x86emuOp_out_word_IMM_AX,
+
+/* 0xe8 */ x86emuOp_call_near_IMM,
+/* 0xe9 */ x86emuOp_jump_near_IMM,
+/* 0xea */ x86emuOp_jump_far_IMM,
+/* 0xeb */ x86emuOp_jump_byte_IMM,
+/* 0xec */ x86emuOp_in_byte_AL_DX,
+/* 0xed */ x86emuOp_in_word_AX_DX,
+/* 0xee */ x86emuOp_out_byte_DX_AL,
+/* 0xef */ x86emuOp_out_word_DX_AX,
+
+/* 0xf0 */ x86emuOp_lock,
+/* 0xf1 */ x86emuOp_illegal_op,
+/* 0xf2 */ x86emuOp_repne,
+/* 0xf3 */ x86emuOp_repe,
+/* 0xf4 */ x86emuOp_halt,
+/* 0xf5 */ x86emuOp_cmc,
+/* 0xf6 */ x86emuOp_opcF6_byte_RM,
+/* 0xf7 */ x86emuOp_opcF7_word_RM,
+
+/* 0xf8 */ x86emuOp_clc,
+/* 0xf9 */ x86emuOp_stc,
+/* 0xfa */ x86emuOp_cli,
+/* 0xfb */ x86emuOp_sti,
+/* 0xfc */ x86emuOp_cld,
+/* 0xfd */ x86emuOp_std,
+/* 0xfe */ x86emuOp_opcFE_byte_RM,
+/* 0xff */ x86emuOp_opcFF_word_RM,
+};
projects / people / teissler / ipfire-2.x.git / blobdiff