/* Disassembler code for CR16.
- Copyright 2007, 2008, 2009, 2012 Free Software Foundation, Inc.
+ Copyright (C) 2007-2021 Free Software Foundation, Inc.
Contributed by M R Swami Reddy (MR.Swami.Reddy@nsc.com).
This file is part of GAS, GDB and the GNU binutils.
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
-#include "dis-asm.h"
#include "sysdep.h"
+#include "disassemble.h"
#include "opcode/cr16.h"
#include "libiberty.h"
#define ESCAPE_16_BIT 0xB
/* Extract 'n_bits' from 'a' starting from offset 'offs'. */
-#define EXTRACT(a, offs, n_bits) \
- (n_bits == 32 ? (((a) >> (offs)) & 0xffffffffL) \
- : (((a) >> (offs)) & ((1 << (n_bits)) -1)))
+#define EXTRACT(a, offs, n_bits) \
+ (((a) >> (offs)) & ((1ul << ((n_bits) - 1) << 1) - 1))
-/* Set Bit Mask - a mask to set all bits starting from offset 'offs'. */
-#define SBM(offs) ((((1 << (32 - offs)) -1) << (offs)))
-
-typedef unsigned long dwordU;
-typedef unsigned short wordU;
-
-typedef struct
-{
- dwordU val;
- int nbits;
-} parameter;
+/* Set Bit Mask - a mask to set all bits in a 32-bit word starting
+ from offset 'offs'. */
+#define SBM(offs) ((1ul << 31 << 1) - (1ul << (offs)))
/* Structure to map valid 'cinv' instruction options. */
cinv_entry;
/* CR16 'cinv' options mapping. */
-const cinv_entry cr16_cinvs[] =
+static const cinv_entry cr16_cinvs[] =
{
{"cinv[i]", "cinv [i]"},
{"cinv[i,u]", "cinv [i,u]"},
REG_ARG_TYPE;
/* Current opcode table entry we're disassembling. */
-const inst *instruction;
+static const inst *instruction;
/* Current instruction we're disassembling. */
-ins currInsn;
+static ins cr16_currInsn;
/* The current instruction is read into 3 consecutive words. */
-wordU words[3];
+static wordU cr16_words[3];
/* Contains all words in appropriate order. */
-ULONGLONG allWords;
+static ULONGLONG cr16_allWords;
/* Holds the current processed argument number. */
-int processing_argument_number;
+static int processing_argument_number;
/* Nonzero means a IMM4 instruction. */
-int imm4flag;
+static int imm4flag;
/* Nonzero means the instruction's original size is
incremented (escape sequence is used). */
-int size_changed;
+static int size_changed;
/* Print the constant expression length. */
return "ILLEGAL REGISTER";
}
-/* START and END are relating 'allWords' struct, which is 48 bits size.
+/* START and END are relating 'cr16_allWords' struct, which is 48 bits size.
START|--------|END
+---------+---------+---------+---------+
0 16 32 48
words [0] [1] [2] */
-static parameter
+static inline dwordU
makelongparameter (ULONGLONG val, int start, int end)
{
- parameter p;
-
- p.val = (dwordU) EXTRACT (val, 48 - end, end - start);
- p.nbits = end - start;
- return p;
+ return EXTRACT (val, 48 - end, end - start);
}
/* Build a mask of the instruction's 'constant' opcode,
/* Search for a matching opcode. Return 1 for success, 0 for failure. */
-static int
-match_opcode (void)
+int
+cr16_match_opcode (void)
{
unsigned long mask;
- /* The instruction 'constant' opcode doewsn't exceed 32 bits. */
- unsigned long doubleWord = (words[1] + (words[0] << 16)) & 0xffffffff;
+ /* The instruction 'constant' opcode doesn't exceed 32 bits. */
+ unsigned long doubleWord = cr16_words[1] + ((unsigned) cr16_words[0] << 16);
/* Start searching from end of instruction table. */
instruction = &cr16_instruction[NUMOPCODES - 2];
while (instruction >= cr16_instruction)
{
mask = build_mask ();
- /* Adjust mask for bcond with 32-bit size instruction */
- if ((IS_INSN_MNEMONIC("b") && instruction->size == 2))
- mask = 0xff0f0000;
if ((doubleWord & mask) == BIN (instruction->match,
- instruction->match_bits))
- return 1;
+ instruction->match_bits))
+ return 1;
else
- instruction--;
+ instruction--;
}
return 0;
}
make_argument (argument * a, int start_bits)
{
int inst_bit_size;
- parameter p;
+ dwordU p;
if ((instruction->size == 3) && a->size >= 16)
inst_bit_size = 48;
switch (a->type)
{
case arg_r:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
- a->r = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->r = p;
break;
case arg_rp:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
- a->rp = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->rp = p;
break;
case arg_pr:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
- a->pr = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->pr = p;
break;
case arg_prp:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
- a->prp = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->prp = p;
break;
case arg_ic:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->constant = p;
break;
case arg_cc:
- p = makelongparameter (allWords, inst_bit_size - (start_bits + a->size),
- inst_bit_size - start_bits);
-
- a->cc = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->cc = p;
break;
case arg_idxr:
- if ((IS_INSN_MNEMONIC ("cbitb"))
- || (IS_INSN_MNEMONIC ("sbitb"))
- || (IS_INSN_MNEMONIC ("tbitb")))
- p = makelongparameter (allWords, 8, 9);
+ if (IS_INSN_TYPE (CSTBIT_INS) && instruction->mnemonic[4] == 'b')
+ p = makelongparameter (cr16_allWords, 8, 9);
else
- p = makelongparameter (allWords, 9, 10);
- a->i_r = p.val;
- p = makelongparameter (allWords, inst_bit_size - a->size, inst_bit_size);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords, 9, 10);
+ a->i_r = p;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - a->size, inst_bit_size);
+ a->constant = p;
break;
case arg_idxrp:
- p = makelongparameter (allWords, start_bits + 12, start_bits + 13);
- a->i_r = p.val;
- p = makelongparameter (allWords, start_bits + 13, start_bits + 16);
- a->rp = p.val;
+ p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 13);
+ a->i_r = p;
+ p = makelongparameter (cr16_allWords, start_bits + 13, start_bits + 16);
+ a->rp = p;
if (inst_bit_size > 32)
{
- p = makelongparameter (allWords, inst_bit_size - start_bits - 12,
+ p = makelongparameter (cr16_allWords, inst_bit_size - start_bits - 12,
inst_bit_size);
- a->constant = ((p.val & 0xffff) | (p.val >> 8 & 0xf0000));
+ a->constant = (p & 0xffff) | (p >> 8 & 0xf0000);
}
else if (instruction->size == 2)
{
- p = makelongparameter (allWords, inst_bit_size - 22, inst_bit_size);
- a->constant = (p.val & 0xf) | (((p.val >>20) & 0x3) << 4)
- | ((p.val >>14 & 0x3) << 6) | (((p.val >>7) & 0x1f) <<7);
+ p = makelongparameter (cr16_allWords, inst_bit_size - 22,
+ inst_bit_size);
+ a->constant = ((p & 0xf) | (((p >> 20) & 0x3) << 4)
+ | ((p >> 14 & 0x3) << 6) | (((p >>7) & 0x1f) << 7));
}
else if (instruction->size == 1 && a->size == 0)
a->constant = 0;
break;
case arg_rbase:
- p = makelongparameter (allWords, inst_bit_size, inst_bit_size);
- a->constant = p.val;
- p = makelongparameter (allWords, inst_bit_size - (start_bits + 4),
- inst_bit_size - start_bits);
- a->r = p.val;
+ p = makelongparameter (cr16_allWords, inst_bit_size, inst_bit_size);
+ a->constant = p;
+ p = makelongparameter (cr16_allWords, inst_bit_size - (start_bits + 4),
+ inst_bit_size - start_bits);
+ a->r = p;
break;
case arg_cr:
- p = makelongparameter (allWords, start_bits + 12, start_bits + 16);
- a->r = p.val;
- p = makelongparameter (allWords, inst_bit_size - 16, inst_bit_size);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 16);
+ a->r = p;
+ p = makelongparameter (cr16_allWords, inst_bit_size - 28, inst_bit_size);
+ a->constant = ((p >> 8) & 0xf0000) | (p & 0xffff);
break;
case arg_crp:
if (instruction->size == 1)
- p = makelongparameter (allWords, 12, 16);
+ p = makelongparameter (cr16_allWords, 12, 16);
else
- p = makelongparameter (allWords, start_bits + 12, start_bits + 16);
- a->rp = p.val;
+ p = makelongparameter (cr16_allWords, start_bits + 12, start_bits + 16);
+ a->rp = p;
if (inst_bit_size > 32)
{
- p = makelongparameter (allWords, inst_bit_size - start_bits - 12,
+ p = makelongparameter (cr16_allWords, inst_bit_size - start_bits - 12,
inst_bit_size);
- a->constant = ((p.val & 0xffff) | (p.val >> 8 & 0xf0000));
+ a->constant = ((p & 0xffff) | (p >> 8 & 0xf0000));
}
else if (instruction->size == 2)
{
- p = makelongparameter (allWords, inst_bit_size - 16, inst_bit_size);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords, inst_bit_size - 16,
+ inst_bit_size);
+ a->constant = p;
}
else if (instruction->size == 1 && a->size != 0)
{
- p = makelongparameter (allWords, 4, 8);
+ p = makelongparameter (cr16_allWords, 4, 8);
if (IS_INSN_MNEMONIC ("loadw")
|| IS_INSN_MNEMONIC ("loadd")
|| IS_INSN_MNEMONIC ("storw")
|| IS_INSN_MNEMONIC ("stord"))
- a->constant = (p.val * 2);
+ a->constant = p * 2;
else
- a->constant = p.val;
+ a->constant = p;
}
else /* below case for 0x0(reg pair) */
a->constant = 0;
switch (a->size)
{
case 8 :
- p = makelongparameter (allWords, 0, start_bits);
- a->constant = ((((p.val&0xf00)>>4)) | (p.val&0xf));
+ p = makelongparameter (cr16_allWords, 0, start_bits);
+ a->constant = ((p & 0xf00) >> 4) | (p & 0xf);
break;
case 24:
if (instruction->size == 3)
{
- p = makelongparameter (allWords, 16, inst_bit_size);
- a->constant = ((((p.val>>16)&0xf) << 20)
- | (((p.val>>24)&0xf) << 16)
- | (p.val & 0xffff));
+ p = makelongparameter (cr16_allWords, 16, inst_bit_size);
+ a->constant = ((((p >> 16) & 0xf) << 20)
+ | (((p >> 24) & 0xf) << 16)
+ | (p & 0xffff));
}
else if (instruction->size == 2)
{
- p = makelongparameter (allWords, 8, inst_bit_size);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords, 8, inst_bit_size);
+ a->constant = p;
}
break;
default:
- p = makelongparameter (allWords, inst_bit_size - (start_bits +
- a->size), inst_bit_size - start_bits);
- a->constant = p.val;
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
+ inst_bit_size - start_bits);
+ a->constant = p;
break;
}
}
else
{
- p = makelongparameter (allWords, inst_bit_size -
- (start_bits + a->size),
+ p = makelongparameter (cr16_allWords,
+ inst_bit_size - (start_bits + a->size),
inst_bit_size - start_bits);
- a->constant = p.val;
+ a->constant = p;
}
break;
/* For "bal (ra), disp17" instruction only. */
if ((IS_INSN_MNEMONIC ("bal")) && (i == 0) && instruction->size == 2)
- {
- info->fprintf_func (info->stream, "(ra),");
- continue;
- }
+ {
+ info->fprintf_func (info->stream, "(ra),");
+ continue;
+ }
if ((INST_HAS_REG_LIST) && (i == 2))
- info->fprintf_func (info->stream, "RA");
+ info->fprintf_func (info->stream, "RA");
else
- print_arg (¤tInsn->arg[i], memaddr, info);
+ print_arg (¤tInsn->arg[i], memaddr, info);
if ((i != currentInsn->nargs - 1) && (!IS_INSN_MNEMONIC ("b")))
- info->fprintf_func (info->stream, ",");
+ info->fprintf_func (info->stream, ",");
}
}
/* Build the instruction's arguments. */
-static void
-make_instruction (void)
+void
+cr16_make_instruction (void)
{
int i;
unsigned int shift;
- for (i = 0; i < currInsn.nargs; i++)
+ for (i = 0; i < cr16_currInsn.nargs; i++)
{
argument a;
shift = instruction->operands[i].shift;
make_argument (&a, shift);
- currInsn.arg[i] = a;
+ cr16_currInsn.arg[i] = a;
}
/* Calculate instruction size (in bytes). */
- currInsn.size = instruction->size + (size_changed ? 1 : 0);
+ cr16_currInsn.size = instruction->size + (size_changed ? 1 : 0);
/* Now in bits. */
- currInsn.size *= 2;
+ cr16_currInsn.size *= 2;
}
/* Retrieve a single word from a given memory address. */
bfd_vma mem;
for (i = 0, mem = memaddr; i < 3; i++, mem += 2)
- words[i] = get_word_at_PC (mem, info);
+ cr16_words[i] = get_word_at_PC (mem, info);
- allWords =
- ((ULONGLONG) words[0] << 32) + ((unsigned long) words[1] << 16) + words[2];
+ cr16_allWords = ((ULONGLONG) cr16_words[0] << 32)
+ + ((unsigned long) cr16_words[1] << 16) + cr16_words[2];
}
/* Prints the instruction by calling print_arguments after proper matching. */
/* Retrieve the encoding from current memory location. */
get_words_at_PC (memaddr, info);
/* Find a matching opcode in table. */
- is_decoded = match_opcode ();
+ is_decoded = cr16_match_opcode ();
/* If found, print the instruction's mnemonic and arguments. */
- if (is_decoded > 0 && (words[0] << 16 || words[1]) != 0)
+ if (is_decoded > 0 && (cr16_words[0] != 0 || cr16_words[1] != 0))
{
if (strneq (instruction->mnemonic, "cinv", 4))
- info->fprintf_func (info->stream,"%s", getcinvstring (instruction->mnemonic));
+ info->fprintf_func (info->stream,"%s",
+ getcinvstring (instruction->mnemonic));
else
- info->fprintf_func (info->stream, "%s", instruction->mnemonic);
+ info->fprintf_func (info->stream, "%s", instruction->mnemonic);
- if (((currInsn.nargs = get_number_of_operands ()) != 0)
+ if (((cr16_currInsn.nargs = get_number_of_operands ()) != 0)
&& ! (IS_INSN_MNEMONIC ("b")))
- info->fprintf_func (info->stream, "\t");
- make_instruction ();
+ info->fprintf_func (info->stream, "\t");
+ cr16_make_instruction ();
/* For push/pop/pushrtn with RA instructions. */
- if ((INST_HAS_REG_LIST) && ((words[0] >> 7) & 0x1))
- currInsn.nargs +=1;
- print_arguments (&currInsn, memaddr, info);
- return currInsn.size;
+ if ((INST_HAS_REG_LIST) && ((cr16_words[0] >> 7) & 0x1))
+ cr16_currInsn.nargs +=1;
+ print_arguments (&cr16_currInsn, memaddr, info);
+ return cr16_currInsn.size;
}
/* No match found. */
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