-/* tc-alpha.c - Processor-specific code for the DEC Alpha CPU.
- Copyright (C) 1989, 1993, 1994 Free Software Foundation, Inc.
+/* tc-alpha.c - Processor-specific code for the DEC Alpha AXP CPU.
+ Copyright (C) 1989, 93, 94, 95, 1996 Free Software Foundation, Inc.
Contributed by Carnegie Mellon University, 1993.
Written by Alessandro Forin, based on earlier gas-1.38 target CPU files.
Modified by Ken Raeburn for gas-2.x and ECOFF support.
+ Modified by Richard Henderson for ELF support.
This file is part of GAS, the GNU Assembler.
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GAS; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
/*
* Mach Operating System
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
-/*
- * HISTORY
- * 5-Oct-93 Alessandro Forin (af) at Carnegie-Mellon University
- * First Checkin
- *
- * Author: Alessandro Forin, Carnegie Mellon University
- * Date: Jan 1993
- */
-
-#include <ctype.h>
#include "as.h"
-#include "alpha-opcode.h"
#include "subsegs.h"
-/* The OSF/1 V2.0 Alpha compiler can't compile this file with inline
- functions. */
-#ifndef __GNUC__
-#undef inline
-#define inline
+#include "opcode/alpha.h"
+
+#ifdef OBJ_ELF
+#include "elf/alpha.h"
#endif
-/* @@ Will a simple 0x8000 work here? If not, why not? */
-#define GP_ADJUSTMENT (0x8000 - 0x10)
+#include <ctype.h>
-/* These are exported to relaxing code, even though we don't do any
- relaxing on this processor currently. */
-int md_short_jump_size = 4;
-int md_long_jump_size = 4;
+\f
+/* Local types */
-/* handle of the OPCODE hash table */
-static struct hash_control *op_hash;
+#define MAX_INSN_FIXUPS 2
+#define MAX_INSN_ARGS 5
-/* Sections and symbols we'll want to keep track of. */
-static segT lita_sec, rdata, sdata, lit8_sec, lit4_sec;
-static symbolS *lit8_sym, *lit4_sym;
+struct alpha_fixup
+{
+ expressionS exp;
+ bfd_reloc_code_real_type reloc;
+};
-/* Setting for ".set [no]{at,macro}". */
-static int at_ok = 1, macro_ok = 1;
+struct alpha_insn
+{
+ unsigned insn;
+ int nfixups;
+ struct alpha_fixup fixups[MAX_INSN_FIXUPS];
+};
-/* Keep track of global pointer. */
-valueT alpha_gp_value;
-static symbolS *gp;
+enum alpha_macro_arg
+{
+ MACRO_EOA = 1, MACRO_IR, MACRO_PIR, MACRO_CPIR, MACRO_FPR, MACRO_EXP
+};
-/* We'll probably be using this relocation frequently, and we
- will want to compare for it. */
-static reloc_howto_type *gpdisp_hi16_howto;
+struct alpha_macro
+{
+ const char *name;
+ void (*emit) PARAMS((const expressionS *, int, void *));
+ void *arg;
+ enum alpha_macro_arg argsets[16];
+};
-/* These are exported to ECOFF code. */
-unsigned long alpha_gprmask, alpha_fprmask;
+/* Two extra symbols we want to see in our input. This is a blatent
+ misuse of the expressionS.X_op field. */
-/* Used for LITUSE relocations. */
-static expressionS lituse_basereg, lituse_byteoff, lituse_jsr;
+#define O_pregister (O_max+1) /* O_register, but in parentheses */
+#define O_cpregister (O_pregister+1) /* + a leading comma */
-/* Address size: In OSF/1 1.3, an undocumented "-32addr" option will
- cause all addresses to be treated as 32-bit values in memory. (The
- in-register versions are all sign-extended to 64 bits, of course.)
- Some other systems may want this option too. */
-static int addr32;
+/* Macros for extracting the type and number of encoded register tokens */
-/* Symbol labelling the current insn. When the Alpha gas sees
- foo:
- .quad 0
- and the section happens to not be on an eight byte boundary, it
- will align both the symbol and the .quad to an eight byte boundary. */
-static symbolS *insn_label;
+#define is_ir_num(x) (((x) & 32) == 0)
+#define is_fpr_num(x) (((x) & 32) != 0)
+#define regno(x) ((x) & 31)
-/* Whether we should automatically align data generation pseudo-ops.
- .align 0 will turn this off. */
-static int auto_align = 1;
-
-/* Imported functions -- they should be defined in header files somewhere. */
-extern segT subseg_get ();
-extern PTR bfd_alloc_by_size_t ();
-extern void s_globl (), s_long (), s_short (), s_space (), cons (), s_text (),
- s_data (), float_cons ();
-
-/* Static functions, needing forward declarations. */
-static void s_base (), s_proc (), s_alpha_set ();
-static void s_gprel32 (), s_rdata (), s_sdata (), s_alpha_comm ();
-static void s_alpha_text PARAMS ((int));
-static void s_alpha_data PARAMS ((int));
-static void s_alpha_align PARAMS ((int));
-static void s_alpha_cons PARAMS ((int));
-static void s_alpha_float_cons PARAMS ((int));
-static int alpha_ip ();
-
-static void emit_unaligned_io PARAMS ((char *, int, valueT, int));
-static void emit_load_unal PARAMS ((int, valueT, int));
-static void emit_store_unal PARAMS ((int, valueT, int));
-static void emit_byte_manip_r PARAMS ((char *, int, int, int, int, int));
-static void emit_extract_r PARAMS ((int, int, int, int, int));
-static void emit_insert_r PARAMS ((int, int, int, int, int));
-static void emit_mask_r PARAMS ((int, int, int, int, int));
-static void emit_sign_extend PARAMS ((int, int));
-static void emit_bis_r PARAMS ((int, int, int));
-static int build_mem PARAMS ((int, int, int, bfd_signed_vma));
-static int build_operate_n PARAMS ((int, int, int, int, int));
-static void emit_sll_n PARAMS ((int, int, int));
-static void emit_ldah_num PARAMS ((int, bfd_vma, int));
-static void emit_addq_r PARAMS ((int, int, int));
-static void emit_lda_n PARAMS ((int, bfd_vma, int));
-static void emit_add64 PARAMS ((int, int, bfd_vma));
-static int in_range_signed PARAMS ((bfd_vma, int));
-static void alpha_align PARAMS ((int, int, symbolS *));
+/* Something odd inherited from the old assembler */
-const pseudo_typeS md_pseudo_table[] =
-{
- {"common", s_comm, 0}, /* is this used? */
- {"comm", s_alpha_comm, 0}, /* osf1 compiler does this */
- {"text", s_alpha_text, 0},
- {"data", s_alpha_data, 0},
- {"rdata", s_rdata, 0},
- {"sdata", s_sdata, 0},
- {"gprel32", s_gprel32, 0},
- {"t_floating", s_alpha_float_cons, 'd'},
- {"s_floating", s_alpha_float_cons, 'f'},
- {"f_floating", s_alpha_float_cons, 'F'},
- {"g_floating", s_alpha_float_cons, 'G'},
- {"d_floating", s_alpha_float_cons, 'D'},
+#define note_gpreg(R) (alpha_gprmask |= (1 << (R)))
+#define note_fpreg(R) (alpha_fprmask |= (1 << (R)))
- {"proc", s_proc, 0},
- {"aproc", s_proc, 1},
- {"set", s_alpha_set, 0},
- {"reguse", s_ignore, 0},
- {"livereg", s_ignore, 0},
- {"base", s_base, 0}, /*??*/
- {"option", s_ignore, 0},
- {"prologue", s_ignore, 0},
- {"aent", s_ignore, 0},
- {"ugen", s_ignore, 0},
+/* Predicates for 16- and 32-bit ranges */
- {"align", s_alpha_align, 0},
- {"byte", s_alpha_cons, 0},
- {"hword", s_alpha_cons, 1},
- {"int", s_alpha_cons, 2},
- {"long", s_alpha_cons, 2},
- {"octa", s_alpha_cons, 4},
- {"quad", s_alpha_cons, 3},
- {"short", s_alpha_cons, 1},
- {"word", s_alpha_cons, 1},
- {"double", s_alpha_float_cons, 'd'},
- {"float", s_alpha_float_cons, 'f'},
- {"single", s_alpha_float_cons, 'f'},
+#define range_signed_16(x) ((offsetT)(x) >= -(offsetT)0x8000 && \
+ (offsetT)(x) <= (offsetT)0x7FFF)
+#define range_signed_32(x) ((offsetT)(x) >= -(offsetT)0x80000000 && \
+ (offsetT)(x) <= (offsetT)0x7FFFFFFF)
-/* We don't do any optimizing, so we can safely ignore these. */
- {"noalias", s_ignore, 0},
- {"alias", s_ignore, 0},
+/* Macros for sign extending from 16- and 32-bits. */
+/* XXX: The cast macros will work on all the systems that I care about,
+ but really a predicate should be found to use the non-cast forms. */
- {NULL, 0, 0},
-};
+#if 1
+#define sign_extend_16(x) ((short)(x))
+#define sign_extend_32(x) ((int)(x))
+#else
+#define sign_extend_16(x) ((offsetT)(((x) & 0xFFFF) ^ 0x8000) - 0x8000)
+#define sign_extend_32(x) ((offsetT)(((x) & 0xFFFFFFFF) \
+ ^ 0x80000000) - 0x80000000)
+#endif
-#define SA 21 /* shift for register Ra */
-#define SB 16 /* shift for register Rb */
-#define SC 0 /* shift for register Rc */
-#define SN 13 /* shift for 8 bit immediate # */
-
-#define T9 23
-#define T10 24
-#define T11 25
-#define T12 26
-#define RA 26 /* note: same as T12 */
-#define PV 27
-#define AT 28
-#define GP 29
-#define SP 30
-#define ZERO 31
-
-#define OPCODE(X) (((X) >> 26) & 0x3f)
-#define OP_FCN(X) (((X) >> 5) & 0x7f)
-
-#ifndef FIRST_32BIT_QUADRANT
-#define FIRST_32BIT_QUADRANT 0
+/* Macros to build tokens */
+
+#define set_tok_reg(t, r) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_register, \
+ (t).X_add_number = (r))
+#define set_tok_preg(t, r) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_pregister, \
+ (t).X_add_number = (r))
+#define set_tok_cpreg(t, r) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_cpregister, \
+ (t).X_add_number = (r))
+#define set_tok_freg(t, r) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_register, \
+ (t).X_add_number = (r)+32)
+#define set_tok_sym(t, s, a) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_symbol, \
+ (t).X_add_symbol = (s), \
+ (t).X_add_number = (a))
+#define set_tok_const(t, n) (memset(&(t), 0, sizeof(t)), \
+ (t).X_op = O_constant, \
+ (t).X_add_number = (n))
+
+\f
+/* Prototypes for all local functions */
+
+static int tokenize_arguments PARAMS((char *, expressionS*, int));
+static const struct alpha_opcode *find_opcode_match
+ PARAMS((const struct alpha_opcode*, const expressionS*, int*, int*));
+static const struct alpha_macro *find_macro_match
+ PARAMS((const struct alpha_macro*, const expressionS*, int*));
+static unsigned insert_operand PARAMS((unsigned, const struct alpha_operand*,
+ offsetT, char *, unsigned));
+static void assemble_insn PARAMS((const struct alpha_opcode*,
+ const expressionS*, int,
+ struct alpha_insn*));
+static void emit_insn PARAMS((struct alpha_insn *));
+static void assemble_tokens_to_insn PARAMS((const char *, const expressionS*,
+ int, struct alpha_insn *));
+static void assemble_tokens PARAMS((const char *, const expressionS*,
+ int, int));
+
+static int load_expression PARAMS((int, const expressionS*, int *,
+ expressionS*));
+
+static void emit_ldgp PARAMS((const expressionS*, int, void*));
+static void emit_division PARAMS((const expressionS*, int, void*));
+static void emit_lda PARAMS((const expressionS*, int, void*));
+static void emit_ir_load PARAMS((const expressionS*, int, void*));
+static void emit_loadstore PARAMS((const expressionS*, int, void*));
+static void emit_jsrjmp PARAMS((const expressionS*, int, void*));
+
+static void s_alpha_text PARAMS((int));
+static void s_alpha_data PARAMS((int));
+#ifndef OBJ_ELF
+static void s_alpha_comm PARAMS((int));
#endif
+static void s_alpha_rdata PARAMS((int));
+static void s_alpha_sdata PARAMS((int));
+static void s_alpha_gprel32 PARAMS((int));
+static void s_alpha_float_cons PARAMS((int));
+static void s_alpha_proc PARAMS((int));
+static void s_alpha_set PARAMS((int));
+static void s_alpha_base PARAMS((int));
+static void s_alpha_align PARAMS((int));
+static void s_alpha_cons PARAMS((int));
+
+static void create_literal_section PARAMS((const char *, segT*, symbolS**));
+#ifndef OBJ_ELF
+static void select_gp_value PARAMS((void));
+#endif
+static void alpha_align PARAMS((int, char *, symbolS *));
-int first_32bit_quadrant = FIRST_32BIT_QUADRANT;
-int base_register = FIRST_32BIT_QUADRANT ? ZERO : GP;
+\f
+/* Generic assembler global variables which must be defined by all
+ targets. */
-int no_mixed_code = 0;
-int nofloats = 0;
+/* These are exported to relaxing code, even though we don't do any
+ relaxing on this processor currently. */
+int md_short_jump_size = 4;
+int md_long_jump_size = 4;
-/* This array holds the chars that always start a comment. If the
- pre-processor is disabled, these aren't very useful */
+/* Characters which always start a comment. */
const char comment_chars[] = "#";
-/* This array holds the chars that only start a comment at the beginning of
- a line. If the line seems to have the form '# 123 filename'
- .line and .file directives will appear in the pre-processed output */
-/* Note that input_file.c hand checks for '#' at the beginning of the
- first line of the input file. This is because the compiler outputs
- #NO_APP at the beginning of its output. */
-/* Also note that C style comments are always recognized. */
-const char line_comment_chars[] = "#!";
+/* Characters which start a comment at the beginning of a line. */
+const char line_comment_chars[] = "#";
-/* Chars that can be used to separate mant from exp in floating point nums */
-const char EXP_CHARS[] = "eE";
+/* Characters which may be used to separate multiple commands on a
+ single line. */
+const char line_separator_chars[] = ";";
-const char line_separator_chars[1];
+/* Characters which are used to indicate an exponent in a floating
+ point number. */
+const char EXP_CHARS[] = "eE";
-/* Chars that mean this number is a floating point constant, as in
- "0f12.456" or "0d1.2345e12". */
-/* @@ Do all of these really get used on the alpha?? */
+/* Characters which mean that a number is a floating point constant,
+ as in 0d1.0. */
+#if 0
+const char FLT_CHARS[] = "dD";
+#else
+/* XXX: Do all of these really get used on the alpha?? */
char FLT_CHARS[] = "rRsSfFdDxXpP";
+#endif
-/* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be
- changed in read.c. Ideally it shouldn't have to know about it at all,
- but nothing is ideal around here. */
+const char *md_shortopts = "Fm:g";
-struct reloc_data {
- expressionS exp;
- int pcrel;
- bfd_reloc_code_real_type code;
+struct option md_longopts[] = {
+#define OPTION_32ADDR (OPTION_MD_BASE)
+ { "32addr", no_argument, NULL, OPTION_32ADDR },
+ { NULL, no_argument, NULL, 0 }
};
-/* Occasionally, two relocations will be desired for one address.
- Mainly only in cases like "jsr $r,foo" where we want both a LITUSE
- and a HINT reloc. */
-#define MAX_RELOCS 2
+size_t md_longopts_size = sizeof(md_longopts);
-struct alpha_it {
- unsigned long opcode; /* need at least 32 bits */
- struct reloc_data reloc[MAX_RELOCS];
-};
+\f
+/* The cpu for which we are generating code */
+static unsigned alpha_target = AXP_OPCODE_ALL;
+static const char *alpha_target_name = "<all>";
-static void getExpression (char *str, struct alpha_it *insn);
-static char *expr_end;
+/* Forward declaration of the table of macros */
+static const struct alpha_macro alpha_macros[];
+static const int alpha_num_macros;
-#define note_gpreg(R) (alpha_gprmask |= (1 << (R)))
-#define note_fpreg(R) (alpha_fprmask |= (1 << (R)))
+/* The hash table of instruction opcodes */
+static struct hash_control *alpha_opcode_hash;
-int
-tc_get_register (frame)
- int frame;
-{
- int framereg = SP;
+/* The hash table of macro opcodes */
+static struct hash_control *alpha_macro_hash;
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '$')
- {
- input_line_pointer++;
- if (input_line_pointer[0] == 's'
- && input_line_pointer[1] == 'p')
- {
- input_line_pointer += 2;
- framereg = SP;
- }
- else
- framereg = get_absolute_expression ();
- framereg &= 31; /* ? */
- }
- else
- as_warn ("frame reg expected, using $%d.", framereg);
+#ifdef OBJ_ECOFF
+/* The $gp relocation symbol */
+static symbolS *alpha_gp_symbol;
- note_gpreg (framereg);
- return framereg;
-}
+/* XXX: what is this, and why is it exported? */
+valueT alpha_gp_value;
+#endif
-/* Handle the .text pseudo-op. This is like the usual one, but it
- clears insn_label and restores auto alignment. */
+/* The current $gp register */
+static int alpha_gp_register = AXP_REG_GP;
-static void
-s_alpha_text (i)
- int i;
-{
- s_text (i);
- insn_label = NULL;
- auto_align = 1;
-}
+/* A table of the register symbols */
+static symbolS *alpha_register_table[64];
-/* Handle the .data pseudo-op. This is like the usual one, but it
- clears insn_label and restores auto alignment. */
+/* Constant sections, or sections of constants */
+#ifdef OBJ_ECOFF
+static segT alpha_lita_section;
+static segT alpha_lit4_section;
+#endif
+static segT alpha_lit8_section;
-static void
-s_alpha_data (i)
- int i;
-{
- s_data (i);
- insn_label = NULL;
- auto_align = 1;
-}
+/* Symbols referring to said sections. */
+#ifdef OBJ_ECOFF
+static symbolS *alpha_lita_symbol;
+static symbolS *alpha_lit4_symbol;
+#endif
+static symbolS *alpha_lit8_symbol;
-static void
-s_rdata (ignore)
- int ignore;
-{
- int temp;
+/* Is the assembler not allowed to use $at? */
+static int alpha_noat_on = 0;
- temp = get_absolute_expression ();
-#if 0
- if (!rdata)
- rdata = subseg_get (".rdata", 0);
- subseg_set (rdata, (subsegT) temp);
-#else
- rdata = subseg_new (".rdata", 0);
-#endif
- demand_empty_rest_of_line ();
- insn_label = NULL;
- auto_align = 1;
-}
+/* Are macros enabled? */
+static int alpha_macros_on = 1;
-static void
-s_sdata (ignore)
- int ignore;
-{
- int temp;
+/* Are floats disabled? */
+static int alpha_nofloats_on = 0;
- temp = get_absolute_expression ();
-#if 0
- if (!sdata)
- sdata = subseg_get (".sdata", 0);
- subseg_set (sdata, (subsegT) temp);
-#else
- sdata = subseg_new (".sdata", 0);
-#endif
- demand_empty_rest_of_line ();
- insn_label = NULL;
- auto_align = 1;
-}
+/* Are addresses 32 bit? */
+static int alpha_addr32_on = 0;
-static void
-s_alpha_comm (ignore)
- int ignore;
+/* Symbol labelling the current insn. When the Alpha gas sees
+ foo:
+ .quad 0
+ and the section happens to not be on an eight byte boundary, it
+ will align both the symbol and the .quad to an eight byte boundary. */
+static symbolS *alpha_insn_label;
+
+/* Whether we should automatically align data generation pseudo-ops.
+ .align 0 will turn this off. */
+static int alpha_auto_align_on = 1;
+
+/* These are exported to ECOFF code. */
+unsigned long alpha_gprmask, alpha_fprmask;
+
+\f
+/* Public interface functions */
+
+/*
+ * This function is called once, at assembler startup time. It sets up
+ * all the tables, etc. that the MD part of the assembler will need,
+ * that can be determined before arguments are parsed.
+ */
+
+void
+md_begin ()
{
- register char *name;
- register char c;
- register char *p;
- offsetT temp;
- register symbolS *symbolP;
+ unsigned int i = 0;
- name = input_line_pointer;
- c = get_symbol_end ();
- /* just after name is now '\0' */
- p = input_line_pointer;
- *p = c;
- SKIP_WHITESPACE ();
- /* Alpha OSF/1 compiler doesn't provide the comma, gcc does. */
- if (*input_line_pointer == ',')
+ /* Create the opcode hash table */
+
+ alpha_opcode_hash = hash_new ();
+ for (i = 0; i < alpha_num_opcodes; )
{
- input_line_pointer++;
- SKIP_WHITESPACE ();
+ const char *name, *retval;
+
+ name = alpha_opcodes[i].name;
+ retval = hash_insert (alpha_opcode_hash, name, (PTR)&alpha_opcodes[i]);
+ if (retval)
+ as_fatal ("internal error: can't hash opcode `%s': %s", name, retval);
+
+ while (++i < alpha_num_opcodes
+ && (alpha_opcodes[i].name == name
+ || !strcmp (alpha_opcodes[i].name, name)))
+ continue;
}
- if ((temp = get_absolute_expression ()) < 0)
+
+ /* Some opcodes include modifiers of various sorts with a "/mod" syntax,
+ like the architecture manual suggests. However, for use with gcc at
+ least, we also need access to those same opcodes without the "/". */
+ for (i = 0; i < alpha_num_opcodes; )
{
- as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
- ignore_rest_of_line ();
- return;
+ const char *name, *slash;
+ name = alpha_opcodes[i].name;
+ if ((slash = strchr(name, '/')) != NULL)
+ {
+ char *p = xmalloc (strlen (name));
+ memcpy(p, name, slash-name);
+ strcpy(p+(slash-name), slash+1);
+
+ (void)hash_insert(alpha_opcode_hash, p, (PTR)&alpha_opcodes[i]);
+ /* Ignore failures -- the opcode table does duplicate some
+ variants in different forms, like "hw_stq" and "hw_st/q". */
+ }
+
+ while (++i < alpha_num_opcodes
+ && (alpha_opcodes[i].name == name
+ || !strcmp (alpha_opcodes[i].name, name)))
+ continue;
}
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
- if (S_IS_DEFINED (symbolP))
+
+ /* Create the macro hash table */
+
+ alpha_macro_hash = hash_new ();
+ for (i = 0; i < alpha_num_macros; )
{
- as_bad ("Ignoring attempt to re-define symbol");
- ignore_rest_of_line ();
- return;
+ const char *name, *retval;
+
+ name = alpha_macros[i].name;
+ retval = hash_insert (alpha_macro_hash, name, (PTR)&alpha_macros[i]);
+ if (retval)
+ as_fatal ("internal error: can't hash macro `%s': %s", name, retval);
+
+ while (++i < alpha_num_macros
+ && (alpha_macros[i].name == name
+ || !strcmp (alpha_macros[i].name, name)))
+ continue;
}
- if (S_GET_VALUE (symbolP))
+
+ /* Construct symbols for each of the registers */
+
+ for (i = 0; i < 32; ++i)
{
- if (S_GET_VALUE (symbolP) != (valueT) temp)
- as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
- S_GET_NAME (symbolP),
- (long) S_GET_VALUE (symbolP),
- (long) temp);
+ char name[4];
+ sprintf(name, "$%d", i);
+ alpha_register_table[i] = symbol_create(name, reg_section, i,
+ &zero_address_frag);
}
- else
+ for (; i < 64; ++i)
{
- S_SET_VALUE (symbolP, (valueT) temp);
- S_SET_EXTERNAL (symbolP);
+ char name[5];
+ sprintf(name, "$f%d", i-32);
+ alpha_register_table[i] = symbol_create(name, reg_section, i,
+ &zero_address_frag);
}
- know (symbolP->sy_frag == &zero_address_frag);
- demand_empty_rest_of_line ();
-}
+ /* Create the special symbols and sections we'll be using */
-arelent *
-tc_gen_reloc (sec, fixp)
- asection *sec;
- fixS *fixp;
-{
- arelent *reloc;
+ /* So .sbss will get used for tiny objects. */
+ bfd_set_gp_size (stdoutput, 8);
- reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
- reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
- reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
+#ifdef OBJ_ECOFF
+ create_literal_section (".lita", &alpha_lita_section, &alpha_lita_symbol);
- if (fixp->fx_r_type > BFD_RELOC_UNUSED)
- abort ();
+ /* For handling the GP, create a symbol that won't be output in the
+ symbol table. We'll edit it out of relocs later. */
+ alpha_gp_symbol = symbol_create ("<GP value>", alpha_lita_section, 0x8000,
+ &zero_address_frag);
+#endif
- if (fixp->fx_r_type == BFD_RELOC_ALPHA_GPDISP_HI16)
- {
- if (!gpdisp_hi16_howto)
- gpdisp_hi16_howto = bfd_reloc_type_lookup (stdoutput,
- fixp->fx_r_type);
- reloc->howto = gpdisp_hi16_howto;
- }
- else
- reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
- if (reloc->howto == NULL)
+#ifdef OBJ_ELF
+ if (ECOFF_DEBUGGING)
{
- as_bad_where (fixp->fx_file, fixp->fx_line,
- "cannot represent `%s' relocation in object file",
- bfd_get_reloc_code_name (fixp->fx_r_type));
- return NULL;
+ segT sec;
+
+ sec = subseg_new(".mdebug", (subsegT)0);
+ bfd_set_section_flags(stdoutput, sec, SEC_HAS_CONTENTS|SEC_READONLY);
+ bfd_set_section_alignment(stdoutput, sec, 3);
+
+#ifdef ERIC_neverdef
+ sec = subseg_new(".reginfo", (subsegT)0);
+ /* The ABI says this section should be loaded so that the running
+ program can access it. */
+ bfd_set_section_flags(stdoutput, sec,
+ SEC_ALLOC|SEC_LOAD|SEC_READONLY|SEC_DATA);
+ bfd_set_section_alignement(stdoutput, sec, 3);
+#endif
}
- if (!fixp->fx_pcrel != !reloc->howto->pc_relative)
- {
- as_fatal ("internal error? cannot generate `%s' relocation",
- bfd_get_reloc_code_name (fixp->fx_r_type));
- }
- assert (!fixp->fx_pcrel == !reloc->howto->pc_relative);
+#endif /* OBJ_ELF */
- if (fixp->fx_r_type == BFD_RELOC_ALPHA_LITERAL)
- {
- /* fake out bfd_perform_relocation. sigh */
- reloc->addend = -alpha_gp_value;
- }
- else if (reloc->howto->pc_relative && reloc->howto->pcrel_offset)
- {
- reloc->addend = fixp->fx_offset - reloc->address;
- }
- else
- reloc->addend = fixp->fx_offset;
- return reloc;
+ subseg_set(text_section, 0);
}
-static void
-s_base ()
+/*
+ * The public interface to the instruction assembler.
+ */
+
+void
+md_assemble (str)
+ char *str;
{
- if (first_32bit_quadrant)
+ char opname[32]; /* current maximum is 13 */
+ expressionS tok[MAX_INSN_ARGS];
+ int ntok, opnamelen, trunclen;
+
+ /* split off the opcode */
+ opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_/48");
+ trunclen = (opnamelen < sizeof (opname) - 1
+ ? opnamelen
+ : sizeof (opname) - 1);
+ memcpy (opname, str, trunclen);
+ opname[trunclen] = '\0';
+
+ /* tokenize the rest of the line */
+ if ((ntok = tokenize_arguments (str + opnamelen, tok, MAX_INSN_ARGS)) < 0)
{
- /* not fatal, but it might not work in the end */
- as_warn ("File overrides no-base-register option.");
- first_32bit_quadrant = 0;
- }
-
- SKIP_WHITESPACE ();
- if (*input_line_pointer == '$')
- { /* $rNN form */
- input_line_pointer++;
- if (*input_line_pointer == 'r')
- input_line_pointer++;
+ as_bad ("syntax error");
+ return;
}
- base_register = get_absolute_expression ();
- if (base_register < 0 || base_register > 31)
- {
- base_register = GP;
- as_warn ("Bad base register, using $%d.", base_register);
- }
- demand_empty_rest_of_line ();
+ /* finish it off */
+ assemble_tokens (opname, tok, ntok, alpha_macros_on);
}
-static int in_range_signed (val, nbits)
- bfd_vma val;
- int nbits;
+valueT
+md_section_align (seg, size)
+ segT seg;
+ valueT size;
{
- /* Look at top bit of value that would be stored, figure out how it
- would be extended by the hardware, and see if that matches the
- original supplied value. */
- bfd_vma mask;
- bfd_vma one = 1;
- bfd_vma top_bit, stored_value, missing_bits;
-
- mask = (one << nbits) - 1;
- stored_value = val & mask;
- top_bit = stored_value & (one << (nbits - 1));
- missing_bits = val & ~mask;
- /* will sign-extend */
- if (top_bit)
- {
- /* all remaining bits beyond mask should be one */
- missing_bits |= mask;
- return missing_bits + 1 == 0;
- }
- else
- {
- /* all other bits should be zero */
- return missing_bits == 0;
- }
-}
+ int align = bfd_get_section_alignment(stdoutput, seg);
+ valueT mask = ((valueT)1 << align) - 1;
-#if 0
-static int in_range_unsigned (val, nbits)
- bfd_vma val;
- int nbits;
-{
- /* Look at top bit of value that would be stored, figure out how it
- would be extended by the hardware, and see if that matches the
- original supplied value. */
- bfd_vma mask;
- bfd_vma one = 1;
- bfd_vma top_bit, stored_value, missing_bits;
-
- mask = (one << nbits) - 1;
- stored_value = val & mask;
- top_bit = stored_value & (one << nbits - 1);
- missing_bits = val & ~mask;
- return missing_bits == 0;
+ return (size + mask) & ~mask;
}
-#endif
-static void
-s_gprel32 ()
+/*
+ * Turn a string in input_line_pointer into a floating point constant
+ * of type type, and store the appropriate bytes in *litP. The number
+ * of LITTLENUMS emitted is stored in *sizeP. An error message is
+ * returned, or NULL on OK.
+ */
+
+/* Equal to MAX_PRECISION in atof-ieee.c */
+#define MAX_LITTLENUMS 6
+
+char *
+md_atof (type, litP, sizeP)
+ char type;
+ char *litP;
+ int *sizeP;
{
- expressionS e;
- char *p;
+ int prec;
+ LITTLENUM_TYPE words[MAX_LITTLENUMS];
+ LITTLENUM_TYPE *wordP;
+ char *t;
+ char *atof_ieee (), *vax_md_atof ();
- SKIP_WHITESPACE ();
- expression (&e);
- switch (e.X_op)
+ switch (type)
{
- case O_constant:
- e.X_add_symbol = section_symbol (absolute_section);
- /* fall through */
- case O_symbol:
- e.X_op = O_subtract;
- e.X_op_symbol = gp;
+ /* VAX floats */
+ case 'G':
+ /* VAX md_atof doesn't like "G" for some reason. */
+ type = 'g';
+ case 'F':
+ case 'D':
+ return vax_md_atof (type, litP, sizeP);
+
+ /* IEEE floats */
+ case 'f':
+ prec = 2;
break;
- default:
- abort ();
- }
- if (auto_align)
- alpha_align (2, 0, insn_label);
- p = frag_more (4);
- memset (p, 0, 4);
- fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &e, 0,
- BFD_RELOC_GPREL32);
- insn_label = NULL;
-}
-static void
-create_literal_section (secp, name)
- segT *secp;
- const char *name;
-{
- segT current_section = now_seg;
- int current_subsec = now_subseg;
- segT new_sec;
+ case 'd':
+ prec = 4;
+ break;
- *secp = new_sec = subseg_new (name, 0);
- subseg_set (current_section, current_subsec);
- bfd_set_section_alignment (stdoutput, new_sec, 3);
- bfd_set_section_flags (stdoutput, new_sec,
- SEC_RELOC | SEC_ALLOC | SEC_LOAD | SEC_READONLY
- | SEC_DATA);
-}
+ case 'x':
+ case 'X':
+ prec = 6;
+ break;
-static valueT
-get_lit8_offset (val)
- bfd_vma val;
-{
- valueT retval;
- if (lit8_sec == 0)
- {
- create_literal_section (&lit8_sec, ".lit8");
- lit8_sym = section_symbol (lit8_sec);
+ case 'p':
+ case 'P':
+ prec = 6;
+ break;
+
+ default:
+ *sizeP = 0;
+ return "Bad call to MD_ATOF()";
}
- retval = add_to_literal_pool ((symbolS *) 0, val, lit8_sec, 8);
- if (retval >= 0xfff0)
- as_fatal ("overflow in fp literal (.lit8) table");
- return retval;
-}
+ t = atof_ieee (input_line_pointer, type, words);
+ if (t)
+ input_line_pointer = t;
+ *sizeP = prec * sizeof (LITTLENUM_TYPE);
-static valueT
-get_lit4_offset (val)
- bfd_vma val;
-{
- valueT retval;
- if (lit4_sec == 0)
+ for (wordP = words + prec - 1; prec--;)
{
- create_literal_section (&lit4_sec, ".lit4");
- lit4_sym = section_symbol (lit4_sec);
+ md_number_to_chars (litP, (long) (*wordP--), sizeof (LITTLENUM_TYPE));
+ litP += sizeof (LITTLENUM_TYPE);
}
- retval = add_to_literal_pool ((symbolS *) 0, val, lit4_sec, 4);
- if (retval >= 0xfff0)
- as_fatal ("overflow in fp literal (.lit4) table");
- return retval;
-}
-static struct alpha_it clear_insn;
+ return 0;
+}
-/* This function is called once, at assembler startup time. It should
- set up all the tables, etc. that the MD part of the assembler will
- need, that can be determined before arguments are parsed. */
void
-md_begin ()
+md_bignum_to_chars (buf, bignum, nchars)
+ char *buf;
+ LITTLENUM_TYPE *bignum;
+ int nchars;
{
- const char *retval, *name;
- unsigned int i = 0;
-
- op_hash = hash_new ();
-
- for (i = 0; i < NUMOPCODES; )
+ while (nchars)
{
- const char *name = alpha_opcodes[i].name;
- retval = hash_insert (op_hash, name, (PTR) &alpha_opcodes[i]);
- if (retval)
- as_fatal ("internal error: can't hash opcode `%s': %s",
- name, retval);
+ LITTLENUM_TYPE work = *bignum++;
+ int nb = CHARS_PER_LITTLENUM;
do
- i++;
- while (i < NUMOPCODES
- && (alpha_opcodes[i].name == name
- || !strcmp (alpha_opcodes[i].name, name)));
- }
- /* Some opcodes include modifiers of various sorts with a "/mod"
- syntax, like the architecture documentation suggests. However,
- for use with gcc at least, we also need to access those same
- opcodes without the "/". */
- for (i = 0; i < NUMOPCODES; )
- {
- name = alpha_opcodes[i].name;
-
- if (strchr (name, '/'))
{
- char *p = xmalloc (strlen (name));
- const char *q = name;
- char *q2 = p;
-
- for (; *q; q++)
- if (*q != '/')
- *q2++ = *q;
-
- *q2++ = 0;
- retval = hash_insert (op_hash, p, (PTR) &alpha_opcodes[i]);
- /* Ignore failures -- the opcode table does duplicate some
- variants in different forms, like "hw_stq" and "hw_st/q".
- Maybe the variants can be eliminated, and this error
- checking restored. */
+ *buf++ = work & ((1 << BITS_PER_CHAR) - 1);
+ if (--nchars == 0)
+ return;
+ work >>= BITS_PER_CHAR;
}
-
- do
- i++;
- while (i < NUMOPCODES
- && (alpha_opcodes[i].name == name
- || !strcmp (alpha_opcodes[i].name, name)));
+ while (--nb);
}
-
- lituse_basereg.X_op = O_constant;
- lituse_basereg.X_add_number = 1;
- lituse_byteoff.X_op = O_constant;
- lituse_byteoff.X_add_number = 2;
- lituse_jsr.X_op = O_constant;
- lituse_jsr.X_add_number = 3;
-
- /* So .sbss will get used for tiny objects. */
- bfd_set_gp_size (stdoutput, 8);
- create_literal_section (&lita_sec, ".lita");
- /* For handling the GP, create a symbol that won't be output in the
- symbol table. We'll edit it out of relocs later. */
- gp = symbol_create ("<GP value>", lita_sec, 0x8000, &zero_address_frag);
-
- memset (&clear_insn, 0, sizeof (clear_insn));
- for (i = 0; i < MAX_RELOCS; i++)
- clear_insn.reloc[i].code = BFD_RELOC_NONE;
}
-int optnum = 1;
-
-static void
-emit_insn (insn)
- struct alpha_it *insn;
+int
+md_parse_option (c, arg)
+ int c;
+ char *arg;
{
- char *toP;
- int j;
-
- toP = frag_more (4);
+ switch (c)
+ {
+ case 'F':
+ alpha_nofloats_on = 1;
+ break;
- /* put out the opcode */
- md_number_to_chars (toP, insn->opcode, 4);
+ case OPTION_32ADDR:
+ alpha_addr32_on = 1;
+ break;
- /* put out the symbol-dependent stuff */
- for (j = 0; j < MAX_RELOCS; j++)
- {
- struct reloc_data *r = &insn->reloc[j];
- fixS *f;
+ case 'g':
+ /* Ignore `-g' so gcc can provide this option to the Digital
+ UNIX assembler, which otherwise would throw away info that
+ mips-tfile needs. */
+ break;
- if (r->code != BFD_RELOC_NONE)
+ case 'm':
+ {
+ static const struct machine
{
- if (r->exp.X_op == O_constant)
- {
- r->exp.X_add_symbol = section_symbol (absolute_section);
- r->exp.X_op = O_symbol;
- }
- f = fix_new_exp (frag_now, (toP - frag_now->fr_literal), 4,
- &r->exp, r->pcrel, r->code);
- if (r->code == BFD_RELOC_ALPHA_GPDISP_LO16)
+ const char *name;
+ unsigned flags;
+ } *p, m[] =
+ {
+ { "21064", AXP_OPCODE_EV4|AXP_OPCODE_ALL },
+ { "21066", AXP_OPCODE_EV4|AXP_OPCODE_ALL },
+ { "21164", AXP_OPCODE_EV5|AXP_OPCODE_ALL },
+ { "21164a", AXP_OPCODE_EV56|AXP_OPCODE_ALL },
+ { "ev4", AXP_OPCODE_EV4|AXP_OPCODE_ALL },
+ { "ev45", AXP_OPCODE_EV4|AXP_OPCODE_ALL },
+ { "ev5", AXP_OPCODE_EV5|AXP_OPCODE_ALL },
+ { "ev56", AXP_OPCODE_EV56|AXP_OPCODE_ALL },
+ { "all", AXP_OPCODE_ALL },
+ { 0 }
+ };
+
+ for (p = m; p->name; ++p)
+ if (strcmp(arg, p->name) == 0)
{
- static bit_fixS cookie;
- /* @@ This'll make the range checking in write.c shut up. */
- f->fx_bit_fixP = &cookie;
+ alpha_target_name = p->name, alpha_target = p->flags;
+ goto found;
}
- }
+ as_warn("Unknown CPU identifier `%s'", arg);
+ found:;
+ }
+ break;
+
+ default:
+ return 0;
}
- insn_label = NULL;
+ return 1;
}
void
-md_assemble (str)
- char *str;
+md_show_usage (stream)
+ FILE *stream;
{
- int i, count;
-#define MAX_INSNS 5
- struct alpha_it insns[MAX_INSNS];
-
- count = alpha_ip (str, insns);
- if (count <= 0)
- return;
-
- for (i = 0; i < count; i++)
- emit_insn (&insns[i]);
+ fputs("\
+Alpha options:\n\
+-32addr treat addresses as 32-bit values\n\
+-F lack floating point instructions support\n\
+-m21064 | -m21066 | -m21164 | -m21164a | -m21264\n\
+ specify variant of Alpha architecture\n",
+ stream);
}
-static inline void
-maybe_set_gp (sec)
- asection *sec;
+/* FIXME (inherited): @@ Is this right?? */
+
+long
+md_pcrel_from (fixP)
+ fixS *fixP;
{
- bfd_vma vma;
- if (!sec)
- return;
- vma = bfd_get_section_vma (foo, sec);
- if (vma && vma < alpha_gp_value)
- alpha_gp_value = vma;
+ valueT addr = fixP->fx_where + fixP->fx_frag->fr_address;
+ switch (fixP->fx_r_type)
+ {
+ case BFD_RELOC_ALPHA_GPDISP:
+ case BFD_RELOC_ALPHA_GPDISP_HI16:
+ case BFD_RELOC_ALPHA_GPDISP_LO16:
+ return addr;
+ default:
+ return fixP->fx_size + addr;
+ }
}
-static void
-select_gp_value ()
+int
+md_apply_fix (fixP, valueP)
+ fixS *fixP;
+ valueT *valueP;
{
- if (alpha_gp_value != 0)
- abort ();
+ char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
+ valueT value = *valueP;
+ unsigned image, size;
- /* Get minus-one in whatever width... */
- alpha_gp_value = 0; alpha_gp_value--;
+ switch (fixP->fx_r_type)
+ {
+ /* The GPDISP relocations are processed internally with a symbol
+ referring to the current function; we need to drop in a value
+ which, when added to the address of the start of the function,
+ gives the desired GP. */
+ case BFD_RELOC_ALPHA_GPDISP_HI16:
+ {
+ fixS *next = fixP->fx_next;
+ assert (next->fx_r_type == BFD_RELOC_ALPHA_GPDISP_LO16);
- /* Select the smallest VMA of these existing sections. */
- maybe_set_gp (lita_sec);
-/* maybe_set_gp (sdata); Was disabled before -- should we use it? */
-#if 0
- maybe_set_gp (lit8_sec);
- maybe_set_gp (lit4_sec);
-#endif
+ fixP->fx_offset = (next->fx_frag->fr_address + next->fx_where
+ - fixP->fx_frag->fr_address - fixP->fx_where);
- alpha_gp_value += GP_ADJUSTMENT;
+ value = (value - sign_extend_16 (value)) >> 16;
+ }
+#ifdef OBJ_ELF
+ fixP->fx_r_type = BFD_RELOC_ALPHA_GPDISP;
+#endif
+ goto do_reloc_gp;
- S_SET_VALUE (gp, alpha_gp_value);
+ case BFD_RELOC_ALPHA_GPDISP_LO16:
+ value = sign_extend_16 (value);
+ fixP->fx_offset = 0;
+#ifdef OBJ_ELF
+ fixP->fx_done = 1;
+#endif
-#ifdef DEBUG1
- printf ("Chose GP value of %lx\n", alpha_gp_value);
+ do_reloc_gp:
+ fixP->fx_addsy = section_symbol (absolute_section);
+ md_number_to_chars (fixpos, value, 2);
+ break;
+
+ case BFD_RELOC_16:
+ size = 2;
+ goto do_reloc_xx;
+ case BFD_RELOC_32:
+ size = 4;
+ goto do_reloc_xx;
+ case BFD_RELOC_64:
+ size = 8;
+ do_reloc_xx:
+ if (fixP->fx_pcrel == 0 && fixP->fx_addsy == 0)
+ {
+ md_number_to_chars (fixpos, value, size);
+ goto done;
+ }
+ return 1;
+
+#ifdef OBJ_ECOFF
+ case BFD_RELOC_GPREL32:
+ assert (fixP->fx_subsy == alpha_gp_symbol);
+ fixP->fx_subsy = 0;
+ /* FIXME: inherited this obliviousness of `value' -- why? */
+ md_number_to_chars (fixpos, -alpha_gp_value, 4);
+ break;
+#endif
+#ifdef OBJ_ELF
+ case BFD_RELOC_GPREL32:
+ return 1;
+#endif
+
+ case BFD_RELOC_23_PCREL_S2:
+ if (fixP->fx_pcrel == 0 && fixP->fx_addsy == 0)
+ {
+ image = bfd_getl32(fixpos);
+ image = (image & ~0x1FFFFF) | ((value >> 2) & 0x1FFFFF);
+ goto write_done;
+ }
+ return 1;
+
+ case BFD_RELOC_ALPHA_HINT:
+ if (fixP->fx_pcrel == 0 && fixP->fx_addsy == 0)
+ {
+ image = bfd_getl32(fixpos);
+ image = (image & ~0x3FFF) | ((value >> 2) & 0x3FFF);
+ goto write_done;
+ }
+ return 1;
+
+#ifdef OBJ_ECOFF
+ case BFD_RELOC_ALPHA_LITERAL:
+ md_number_to_chars (fixpos, value, 2);
+ return 1;
+
+ case BFD_RELOC_ALPHA_LITUSE:
+ return 1;
+#endif
+#ifdef OBJ_ELF
+ case BFD_RELOC_ALPHA_LITERAL:
+ case BFD_RELOC_ALPHA_LITUSE:
+ return 1;
+#endif
+
+ default:
+ {
+ const struct alpha_operand *operand;
+
+ if (fixP->fx_r_type <= BFD_RELOC_UNUSED)
+ as_fatal ("unhandled relocation type %s",
+ bfd_get_reloc_code_name (fixP->fx_r_type));
+
+ assert (fixP->fx_r_type < BFD_RELOC_UNUSED + alpha_num_operands);
+ operand = &alpha_operands[fixP->fx_r_type - BFD_RELOC_UNUSED];
+
+ /* The rest of these fixups only exist internally during symbol
+ resolution and have no representation in the object file.
+ Therefore they must be completely resolved as constants. */
+
+ if (fixP->fx_addsy != 0
+ && fixP->fx_addsy->bsym->section != absolute_section)
+ as_bad_where (fixP->fx_file, fixP->fx_line,
+ "non-absolute expression in constant field");
+
+ image = bfd_getl32(fixpos);
+ image = insert_operand(image, operand, (offsetT)value,
+ fixP->fx_file, fixP->fx_line);
+ }
+ goto write_done;
+ }
+
+ if (fixP->fx_addsy != 0 || fixP->fx_pcrel != 0)
+ return 1;
+ else
+ {
+ as_warn_where(fixP->fx_file, fixP->fx_line,
+ "type %d reloc done?\n", fixP->fx_r_type);
+ goto done;
+ }
+
+write_done:
+ md_number_to_chars(fixpos, image, 4);
+
+done:
+ fixP->fx_done = 1;
+ return 0;
+}
+
+/*
+ * Look for a register name in the given symbol.
+ */
+
+symbolS *
+md_undefined_symbol(name)
+ char *name;
+{
+ if (*name == '$')
+ {
+ int is_float = 0, num;
+
+ switch (*++name)
+ {
+ case 'f':
+ if (name[1] == 'p' && name[2] == '\0')
+ return alpha_register_table[AXP_REG_FP];
+ is_float = 32;
+ /* FALLTHRU */
+
+ case 'r':
+ if (!isdigit(*++name))
+ break;
+ /* FALLTHRU */
+
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ if (name[1] == '\0')
+ num = name[0] - '0';
+ else if (name[0] != '0' && isdigit(name[1]) && name[2] == '\0')
+ {
+ num = (name[0] - '0')*10 + name[1] - '0';
+ if (num >= 32)
+ break;
+ }
+ else
+ break;
+
+ if (!alpha_noat_on && num == AXP_REG_AT)
+ as_warn("Used $at without \".set noat\"");
+ return alpha_register_table[num + is_float];
+
+ case 'a':
+ if (name[1] == 't' && name[2] == '\0')
+ {
+ if (!alpha_noat_on)
+ as_warn("Used $at without \".set noat\"");
+ return alpha_register_table[AXP_REG_AT];
+ }
+ break;
+
+ case 'g':
+ if (name[1] == 'p' && name[2] == '\0')
+ return alpha_register_table[alpha_gp_register];
+ break;
+
+ case 's':
+ if (name[1] == 'p' && name[2] == '\0')
+ return alpha_register_table[AXP_REG_SP];
+ break;
+ }
+ }
+ return NULL;
+}
+
+#ifdef OBJ_ECOFF
+void
+alpha_frob_ecoff_data ()
+{
+ select_gp_value ();
+ /* $zero and $f31 are read-only */
+ alpha_gprmask &= ~1;
+ alpha_fprmask &= ~1;
+}
#endif
+
+void
+alpha_flush_pending_output ()
+{
+ alpha_insn_label = NULL;
+}
+
+void
+alpha_define_label (sym)
+ symbolS *sym;
+{
+ alpha_insn_label = sym;
}
int
{
case BFD_RELOC_ALPHA_GPDISP_HI16:
case BFD_RELOC_ALPHA_GPDISP_LO16:
+ case BFD_RELOC_ALPHA_GPDISP:
case BFD_RELOC_ALPHA_LITERAL:
case BFD_RELOC_ALPHA_LITUSE:
case BFD_RELOC_GPREL32:
return 1;
- case BFD_RELOC_ALPHA_HINT:
- case BFD_RELOC_64:
- case BFD_RELOC_32:
- case BFD_RELOC_16:
- case BFD_RELOC_8:
+
case BFD_RELOC_23_PCREL_S2:
- case BFD_RELOC_14:
- case BFD_RELOC_26:
- case BFD_RELOC_12_PCREL:
+ case BFD_RELOC_32:
+ case BFD_RELOC_64:
+ case BFD_RELOC_ALPHA_HINT:
return 0;
+
default:
- abort ();
+ assert(f->fx_r_type > BFD_RELOC_UNUSED &&
+ f->fx_r_type < BFD_RELOC_UNUSED + alpha_num_operands);
return 0;
}
}
alpha_fix_adjustable (f)
fixS *f;
{
+#ifdef OBJ_ELF
+ /* Prevent all adjustments to global symbols */
+ if (S_IS_EXTERN (f->fx_addsy))
+ return 0;
+#endif
+
/* Are there any relocation types for which we must generate a reloc
but we can adjust the values contained within it? */
switch (f->fx_r_type)
{
- case BFD_RELOC_ALPHA_GPDISP_HI16:
- case BFD_RELOC_ALPHA_GPDISP_LO16:
- return 0;
case BFD_RELOC_GPREL32:
return 1;
default:
/*NOTREACHED*/
}
-valueT
-md_section_align (seg, size)
- segT seg;
- valueT size;
+arelent *
+tc_gen_reloc (sec, fixp)
+ asection *sec;
+ fixS *fixp;
{
+ arelent *reloc;
+
+ reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent));
+ reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym;
+ reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
+
+ assert (fixp->fx_r_type < BFD_RELOC_UNUSED);
+ reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type);
+ if (reloc->howto == NULL)
+ {
+ as_bad_where (fixp->fx_file, fixp->fx_line,
+ "cannot represent `%s' relocation in object file",
+ bfd_get_reloc_code_name (fixp->fx_r_type));
+ return NULL;
+ }
+
+ if (!fixp->fx_pcrel != !reloc->howto->pc_relative)
+ {
+ as_fatal ("internal error? cannot generate `%s' relocation",
+ bfd_get_reloc_code_name (fixp->fx_r_type));
+ }
+ assert (!fixp->fx_pcrel == !reloc->howto->pc_relative);
+
#ifdef OBJ_ECOFF
- /* This should probably be handled within BFD, or by pulling the
- number from BFD at least. */
-#define MIN 15
- size += MIN;
- size &= ~MIN;
+ if (fixp->fx_r_type == BFD_RELOC_ALPHA_LITERAL)
+ {
+ /* fake out bfd_perform_relocation. sigh */
+ reloc->addend = -alpha_gp_value;
+ }
+ else
#endif
- return size;
-}
+ {
+ reloc->addend = fixp->fx_offset;
+#ifdef OBJ_ELF
+ /*
+ * Ohhh, this is ugly. The problem is that if this is a local global
+ * symbol, the relocation will entirely be performed at link time, not
+ * at assembly time. bfd_perform_reloc doesn't know about this sort
+ * of thing, and as a result we need to fake it out here.
+ */
+ if (S_IS_EXTERN (fixp->fx_addsy) && !S_IS_COMMON(fixp->fx_addsy))
+ reloc->addend -= fixp->fx_addsy->bsym->value;
+#endif
+ }
-static int
-build_mem (opc, ra, rb, disp)
- int opc, ra, rb;
- bfd_signed_vma disp;
-{
- if ((disp >> 15) != 0
- && (disp >> 15) + 1 != 0)
- abort ();
- return ((opc << 26) | (ra << SA) | (rb << SB) | (disp & 0xffff));
+ return reloc;
}
-static int
-build_operate_n (opc, fn, ra, lit, rc)
- int opc, fn, ra, rc;
- int lit;
+int
+tc_get_register (frame)
+ int frame;
{
- if (lit & ~0xff)
- abort ();
- return ((opc << 26) | (fn << 5) | (ra << SA) | (lit << SN) | (1 << 12) | (rc << SC));
+ int framereg = AXP_REG_SP;
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '$')
+ {
+ char *s = input_line_pointer;
+ char c = get_symbol_end();
+ symbolS *sym = md_undefined_symbol(s);
+
+ *strchr(s, '\0') = c;
+ if (sym && (framereg = S_GET_VALUE(sym)) <= 31)
+ goto found;
+ }
+ as_warn ("frame reg expected, using $%d.", framereg);
+
+found:
+ note_gpreg (framereg);
+ return framereg;
}
+\f
+/*
+ * Parse the arguments to an opcode
+ */
+
static int
-build_operate (opc, fn, ra, rb, rc)
- int opc, fn, ra, rb, rc;
+tokenize_arguments (str, tok, ntok)
+ char *str;
+ expressionS tok[];
+ int ntok;
{
- return ((opc << 26) | (fn << 5) | (ra << SA) | (rb << SB) | (rc << SC));
-}
+ expressionS *end_tok = tok + ntok;
+ char *old_input_line_pointer;
+ int saw_comma = 0, saw_arg = 0;
-/* Add this thing to the .lita section and produce a LITERAL reloc referring
- to it. */
+ memset (tok, 0, sizeof(*tok)*ntok);
-/* Are we currently eligible to emit a LITUSE reloc for the literal
- references just generated? */
-static int lituse_pending;
+ /* Save and restore input_line_pointer around this function */
+ old_input_line_pointer = input_line_pointer;
+ input_line_pointer = str;
+
+ while (tok < end_tok && *input_line_pointer)
+ {
+ SKIP_WHITESPACE ();
+ switch (*input_line_pointer)
+ {
+ case '\0':
+ goto fini;
+
+ case ',':
+ ++input_line_pointer;
+ if (saw_comma || !saw_arg)
+ goto err;
+ saw_comma = 1;
+ break;
-static void
-load_symbol_address (reg, insn)
- int reg;
- struct alpha_it *insn;
-{
- static symbolS *lita_sym;
+ case '(':
+ {
+ char *hold = input_line_pointer++;
+
+ /* First try for parenthesized register ... */
+ expression (tok);
+ if (*input_line_pointer == ')' && tok->X_op == O_register)
+ {
+ tok->X_op = (saw_comma ? O_cpregister : O_pregister);
+ saw_comma = 0;
+ saw_arg = 1;
+ ++input_line_pointer;
+ ++tok;
+ break;
+ }
- int x;
- valueT retval;
+ /* ... then fall through to plain expression */
+ input_line_pointer = hold;
+ }
- if (!lita_sym)
- {
- lita_sym = section_symbol (lita_sec);
- S_CLEAR_EXTERNAL (lita_sym);
+ default:
+ if (saw_arg && !saw_comma)
+ goto err;
+ expression (tok);
+ if (tok->X_op == O_illegal || tok->X_op == O_absent)
+ goto err;
+
+ saw_comma = 0;
+ saw_arg = 1;
+ ++tok;
+ break;
+ }
}
- retval = add_to_literal_pool (insn->reloc[0].exp.X_add_symbol,
- insn->reloc[0].exp.X_add_number,
- lita_sec, 8);
+fini:
+ if (saw_comma)
+ goto err;
+ input_line_pointer = old_input_line_pointer;
+ return ntok - (end_tok - tok);
- /* Now emit a LITERAL relocation for the original section. */
- insn->reloc[0].exp.X_op = O_symbol;
- insn->reloc[0].exp.X_add_symbol = lita_sym;
- insn->reloc[0].exp.X_add_number = retval;
- insn->reloc[0].code = BFD_RELOC_ALPHA_LITERAL;
- lituse_pending = 1;
-
- if (retval == 0x8000)
- /* Overflow? */
- as_fatal ("overflow in literal (.lita) table");
- x = retval;
- insn->opcode = build_mem (addr32 ? 0x28 : 0x29, /* ldl or ldq */
- reg, base_register, x & 0xffff);
- note_gpreg (base_register);
+err:
+ input_line_pointer = old_input_line_pointer;
+ return -1;
}
-/* To load an address with a single instruction,
- emit a LITERAL reloc in this section, and a REFQUAD
- for the .lita section, so that we'll be able to access
- it via $gp:
- lda REG, xx -> ldq REG, -32752(gp)
- lda REG, xx+4 -> ldq REG, -32752(gp)
- lda REG, 4(REG)
-
- The offsets need to start near -0x8000, and the generated LITERAL
- relocations should negate the offset. I don't completely grok the
- scheme yet. */
+/*
+ * Search forward through all variants of an opcode
+ * looking for a syntax match.
+ */
-static int
-load_expression (reg, insn)
- int reg;
- struct alpha_it *insn;
+static const struct alpha_opcode *
+find_opcode_match(first_opcode, tok, pntok, pcpumatch)
+ const struct alpha_opcode *first_opcode;
+ const expressionS *tok;
+ int *pntok;
+ int *pcpumatch;
{
- valueT addend, addendhi, addendlo;
- int num_insns = 1;
+ const struct alpha_opcode *opcode = first_opcode;
+ int ntok = *pntok;
+ int got_cpu_match = 0;
- if (insn->reloc[0].exp.X_add_symbol->bsym->flags & BSF_SECTION_SYM)
- {
- addend = 0;
- }
- else
- {
- addend = insn->reloc[0].exp.X_add_number;
- insn->reloc[0].exp.X_add_number = 0;
- }
- load_symbol_address (reg, insn);
- if (addend)
+ do
{
- if ((addend & ~0x7fffffff) != 0
- && (addend & ~0x7fffffff) + 0x80000000 != 0)
- {
- as_bad ("assembler not prepared to handle constants >32 bits yet");
- addend = 0;
- }
- addendlo = addend & 0xffff;
- addend -= addendlo;
- addendhi = addend >> 16;
- if (addendlo & 0x8000)
- addendhi++;
- /* It appears that the BASEREG LITUSE reloc should not be used on
- an LDAH instruction. */
- if (addendlo)
- {
- insn[1].opcode = build_mem (0x08, reg, reg, addendlo & 0xffff);
- insn[1].reloc[0].code = BFD_RELOC_ALPHA_LITUSE;
- insn[1].reloc[0].exp = lituse_basereg;
- num_insns++;
- }
- if (addendhi)
- {
- insn[num_insns].opcode = build_mem (0x09, reg, reg,
- addendhi & 0xffff);
- num_insns++;
- }
- if (num_insns == 1)
- abort ();
- lituse_pending = 0;
- }
- return num_insns;
-}
+ const unsigned char *opidx;
+ int tokidx = 0;
-static inline void
-getExpression (str, this_insn)
- char *str;
- struct alpha_it *this_insn;
-{
- char *save_in;
- segT seg;
-
-#if 0 /* Not converted to bfd yet, and I don't think we need them
- for ECOFF. Re-adding a.out support will probably require
- them though. */
- static const struct am {
- char *name;
- bfd_reloc_code_real_type reloc;
- } macro[] = {
- { "hi", RELOC_48_63 },
- { "lo", RELOC_0_15 },
- { "ml", RELOC_16_31 },
- { "mh", RELOC_32_47 },
- { "uhi", RELOC_U_48_63 },
- { "uml", RELOC_U_16_31 },
- { "umh", RELOC_U_32_47 },
- { 0, }
- };
-
- /* Handle macros: "%macroname(expr)" */
- if (*str == '%')
- {
- struct am *m;
- char *p, *q;
-
- str++;
- m = ¯o[0];
- while (q = m->name)
+ /* Don't match opcodes that don't exist on this architecture */
+ if (!(opcode->flags & alpha_target))
+ goto match_failed;
+
+ got_cpu_match = 1;
+
+ for (opidx = opcode->operands; *opidx; ++opidx)
{
- p = str;
- while (*q && *p == *q)
- p++, q++;
- if (*q == 0)
- break;
- m++;
+ const struct alpha_operand *operand = &alpha_operands[*opidx];
+
+ /* only take input from real operands */
+ if (operand->flags & AXP_OPERAND_FAKE)
+ continue;
+
+ /* when we expect input, make sure we have it */
+ if (tokidx >= ntok)
+ {
+ if ((operand->flags & AXP_OPERAND_OPTIONAL_MASK) == 0)
+ goto match_failed;
+ continue;
+ }
+
+ /* match operand type with expression type */
+ switch (operand->flags & AXP_OPERAND_TYPECHECK_MASK)
+ {
+ case AXP_OPERAND_IR:
+ if (tok[tokidx].X_op != O_register
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ break;
+ case AXP_OPERAND_FPR:
+ if (tok[tokidx].X_op != O_register
+ || !is_fpr_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ break;
+ case AXP_OPERAND_IR|AXP_OPERAND_PARENS:
+ if (tok[tokidx].X_op != O_pregister
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ break;
+ case AXP_OPERAND_IR|AXP_OPERAND_PARENS|AXP_OPERAND_COMMA:
+ if (tok[tokidx].X_op != O_cpregister
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ break;
+
+ case AXP_OPERAND_RELATIVE:
+ case AXP_OPERAND_SIGNED:
+ case AXP_OPERAND_UNSIGNED:
+ switch (tok[tokidx].X_op)
+ {
+ case O_illegal:
+ case O_absent:
+ case O_register:
+ case O_pregister:
+ case O_cpregister:
+ goto match_failed;
+ }
+ break;
+
+ default:
+ /* everything else should have been fake */
+ abort();
+ }
+ ++tokidx;
}
- if (q)
+
+ /* possible match -- did we use all of our input? */
+ if (tokidx == ntok)
{
- str = p; /* keep the '(' */
- this_insn->reloc = m->reloc;
+ *pntok = ntok;
+ return opcode;
}
+
+ match_failed:;
}
-#endif
+ while (++opcode-alpha_opcodes < alpha_num_opcodes
+ && !strcmp(opcode->name, first_opcode->name));
- save_in = input_line_pointer;
- input_line_pointer = str;
+ if (*pcpumatch)
+ *pcpumatch = got_cpu_match;
- seg = expression (&this_insn->reloc[0].exp);
- /* XXX validate seg and exp, make sure they're reasonable */
- expr_end = input_line_pointer;
- input_line_pointer = save_in;
+ return NULL;
}
-static void
-emit_unaligned_io (dir, addr_reg, addr_offset, reg)
- char *dir;
- int addr_reg, reg;
- valueT addr_offset;
+/*
+ * Search forward through all variants of a macro
+ * looking for a syntax match.
+ */
+
+static const struct alpha_macro *
+find_macro_match(first_macro, tok, pntok)
+ const struct alpha_macro *first_macro;
+ const expressionS *tok;
+ int *pntok;
{
- char buf[90];
- sprintf (buf, "%sq_u $%d,%ld($%d)", dir, reg, (long) addr_offset, addr_reg);
- md_assemble (buf);
-}
+ const struct alpha_macro *macro = first_macro;
+ int ntok = *pntok;
-static void
-emit_load_unal (addr_reg, addr_offset, reg)
- int addr_reg, reg;
- valueT addr_offset;
-{
- emit_unaligned_io ("ld", addr_reg, addr_offset, reg);
-}
+ do
+ {
+ const enum alpha_macro_arg *arg = macro->argsets;
+ int tokidx = 0;
-static void
-emit_store_unal (addr_reg, addr_offset, reg)
- int addr_reg, reg;
- valueT addr_offset;
-{
- emit_unaligned_io ("st", addr_reg, addr_offset, reg);
-}
+ while (*arg)
+ {
+ switch (*arg)
+ {
+ case MACRO_EOA:
+ if (tokidx == ntok)
+ return macro;
+ else
+ tokidx = 0;
+ break;
-static void
-emit_byte_manip_r (op, in, mask, out, mode, which)
- char *op;
- int in, mask, out, mode, which;
-{
- char buf[90];
- sprintf (buf, "%s%c%c $%d,$%d,$%d", op, mode, which, in, mask, out);
- md_assemble (buf);
-}
+ case MACRO_IR:
+ if (tokidx >= ntok || tok[tokidx].X_op != O_register
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ ++tokidx;
+ break;
+ case MACRO_PIR:
+ if (tokidx >= ntok || tok[tokidx].X_op != O_pregister
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ ++tokidx;
+ break;
+ case MACRO_CPIR:
+ if (tokidx >= ntok || tok[tokidx].X_op != O_cpregister
+ || !is_ir_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ ++tokidx;
+ break;
+ case MACRO_FPR:
+ if (tokidx >= ntok || tok[tokidx].X_op != O_register
+ || !is_fpr_num(tok[tokidx].X_add_number))
+ goto match_failed;
+ ++tokidx;
+ break;
-static void
-emit_extract_r (in, mask, out, mode, which)
- int in, mask, out, mode, which;
-{
- emit_byte_manip_r ("ext", in, mask, out, mode, which);
-}
+ case MACRO_EXP:
+ if (tokidx >= ntok)
+ goto match_failed;
+ switch (tok[tokidx].X_op)
+ {
+ case O_illegal:
+ case O_absent:
+ case O_register:
+ case O_pregister:
+ case O_cpregister:
+ goto match_failed;
+ }
+ ++tokidx;
+ break;
+
+ match_failed:
+ while (*arg != MACRO_EOA)
+ ++arg;
+ tokidx = 0;
+ break;
+ }
+ ++arg;
+ }
+ }
+ while (++macro-alpha_macros < alpha_num_macros
+ && !strcmp(macro->name, first_macro->name));
-static void
-emit_insert_r (in, mask, out, mode, which)
- int in, mask, out, mode, which;
-{
- emit_byte_manip_r ("ins", in, mask, out, mode, which);
+ return NULL;
}
-static void
-emit_mask_r (in, mask, out, mode, which)
- int in, mask, out, mode, which;
-{
- emit_byte_manip_r ("msk", in, mask, out, mode, which);
-}
+/*
+ * Insert an operand value into an instruction.
+ */
-static void
-emit_sign_extend (reg, size)
- int reg, size;
+static unsigned
+insert_operand(insn, operand, val, file, line)
+ unsigned insn;
+ const struct alpha_operand *operand;
+ offsetT val;
+ char *file;
+ unsigned line;
{
- char buf[90];
- sprintf (buf, "sll $%d,0x%x,$%d", reg, 64 - size, reg);
- md_assemble (buf);
- sprintf (buf, "sra $%d,0x%x,$%d", reg, 64 - size, reg);
- md_assemble (buf);
-}
+ if (operand->bits != 32 && !(operand->flags & AXP_OPERAND_NOOVERFLOW))
+ {
+ offsetT min, max;
-static void
-emit_bis_r (in1, in2, out)
- int in1, in2, out;
-{
- char buf[90];
- sprintf (buf, "bis $%d,$%d,$%d", in1, in2, out);
- md_assemble (buf);
-}
+ if (operand->flags & AXP_OPERAND_SIGNED)
+ {
+ max = (1 << (operand->bits - 1)) - 1;
+ min = -(1 << (operand->bits - 1));
+ }
+ else
+ {
+ max = (1 << operand->bits) - 1;
+ min = 0;
+ }
-static void
-emit_sll_n (dest, disp, src)
- int dest, disp, src;
-{
- struct alpha_it insn = clear_insn;
- insn.opcode = build_operate_n (0x12, 0x39, src, disp, dest);
- emit_insn (&insn);
+ if (val < min || val > max)
+ {
+ const char *err =
+ "operand out of range (%s not between %d and %d)";
+ char buf[sizeof(val)*3+2];
+
+ sprint_value(buf, val);
+ if (file)
+ as_warn_where(file, line, err, buf, min, max);
+ else
+ as_warn(err, buf, min, max);
+ }
+ }
+
+ if (operand->insert)
+ {
+ const char *errmsg = NULL;
+
+ insn = (*operand->insert)(insn, val, &errmsg);
+ if (errmsg)
+ as_warn(errmsg);
+ }
+ else
+ insn |= ((val & ((1 << operand->bits) - 1)) << operand->shift);
+
+ return insn;
}
+/*
+ * Turn an opcode description and a set of arguments into
+ * an instruction and a fixup.
+ */
+
static void
-emit_ldah_num (dest, addend, src)
- int dest, src;
- bfd_vma addend;
+assemble_insn(opcode, tok, ntok, insn)
+ const struct alpha_opcode *opcode;
+ const expressionS *tok;
+ int ntok;
+ struct alpha_insn *insn;
{
- struct alpha_it insn = clear_insn;
- insn.opcode = build_mem (0x09, dest, src, addend);
- emit_insn (&insn);
+ const unsigned char *argidx;
+ unsigned image;
+ int tokidx = 0;
+
+ memset(insn, 0, sizeof(*insn));
+ image = opcode->opcode;
+
+ for (argidx = opcode->operands; *argidx; ++argidx)
+ {
+ const struct alpha_operand *operand = &alpha_operands[*argidx];
+ const expressionS *t;
+
+ if (operand->flags & AXP_OPERAND_FAKE)
+ {
+ /* fake operands take no value and generate no fixup */
+ image = insert_operand(image, operand, 0, NULL, 0);
+ continue;
+ }
+
+ if (tokidx >= ntok)
+ {
+ switch (operand->flags & AXP_OPERAND_OPTIONAL_MASK)
+ {
+ case AXP_OPERAND_DEFAULT_FIRST:
+ t = &tok[0];
+ break;
+ case AXP_OPERAND_DEFAULT_SECOND:
+ t = &tok[1];
+ break;
+ case AXP_OPERAND_DEFAULT_ZERO:
+ {
+ static const expressionS zero_exp = { 0, 0, 0, O_constant, 1 };
+ t = &zero_exp;
+ }
+ break;
+ default:
+ abort();
+ }
+ }
+ else
+ t = &tok[tokidx++];
+
+ switch (t->X_op)
+ {
+ case O_register:
+ case O_pregister:
+ case O_cpregister:
+ image = insert_operand(image, operand, regno(t->X_add_number),
+ NULL, 0);
+ break;
+
+ case O_constant:
+ image = insert_operand(image, operand, t->X_add_number, NULL, 0);
+ break;
+
+ default:
+ {
+ struct alpha_fixup *fixup;
+
+ if (insn->nfixups >= MAX_INSN_FIXUPS)
+ as_fatal("too many fixups");
+
+ fixup = &insn->fixups[insn->nfixups++];
+
+ fixup->exp = *t;
+ fixup->reloc = operand->default_reloc;
+ }
+ break;
+ }
+ }
+
+ insn->insn = image;
}
+/*
+ * Actually output an instruction with its fixup.
+ */
+
static void
-emit_addq_r (in1, in2, out)
- int in1, in2, out;
+emit_insn(insn)
+ struct alpha_insn *insn;
{
- struct alpha_it insn = clear_insn;
- insn.opcode = build_operate (0x10, 0x20, in1, in2, out);
- emit_insn (&insn);
+ char *f;
+ int i;
+
+ /* Take care of alignment duties */
+ if (alpha_auto_align_on)
+ alpha_align (2, (char *) NULL, alpha_insn_label);
+ alpha_insn_label = NULL;
+
+ /* Write out the instruction. */
+ f = frag_more (4);
+ md_number_to_chars (f, insn->insn, 4);
+
+ /* Apply the fixups in order */
+ for (i = 0; i < insn->nfixups; ++i)
+ {
+ struct alpha_fixup *fixup = &insn->fixups[i];
+ int size, pcrel;
+ fixS *fixP;
+
+ /* Some fixups are only used internally and so have no howto */
+ if (fixup->reloc > BFD_RELOC_UNUSED)
+ size = 4, pcrel = 0;
+#ifdef OBJ_ELF
+ /* These relocation types are only used internally. */
+ else if (fixup->reloc == BFD_RELOC_ALPHA_GPDISP_HI16
+ || fixup->reloc == BFD_RELOC_ALPHA_GPDISP_LO16)
+ {
+ size = 2, pcrel = 0;
+ }
+#endif
+ else
+ {
+ reloc_howto_type *reloc_howto
+ = bfd_reloc_type_lookup (stdoutput, fixup->reloc);
+ assert (reloc_howto);
+
+ size = bfd_get_reloc_size (reloc_howto);
+ pcrel = reloc_howto->pc_relative;
+ }
+ assert (size >= 1 && size <= 4);
+
+ fixP = fix_new_exp (frag_now, f - frag_now->fr_literal, size,
+ &fixup->exp, pcrel, fixup->reloc);
+
+ /* Turn off complaints that the addend is too large for some fixups */
+ switch (fixup->reloc)
+ {
+ case BFD_RELOC_ALPHA_GPDISP_LO16:
+ case BFD_RELOC_ALPHA_LITERAL:
+ case BFD_RELOC_GPREL32:
+ fixP->fx_no_overflow = 1;
+ break;
+ default:
+ break;
+ }
+ }
}
+/*
+ * Given an opcode name and a pre-tokenized set of arguments,
+ * assemble the insn, but do not emit it.
+ */
+
static void
-emit_lda_n (dest, addend, src)
- int dest, src;
- bfd_vma addend;
+assemble_tokens_to_insn(opname, tok, ntok, insn)
+ const char *opname;
+ const expressionS *tok;
+ int ntok;
+ struct alpha_insn *insn;
{
- struct alpha_it insn = clear_insn;
- insn.opcode = build_mem (0x08, dest, src, addend);
- emit_insn (&insn);
+ const struct alpha_opcode *opcode;
+
+ /* search opcodes */
+ opcode = (const struct alpha_opcode *) hash_find (alpha_opcode_hash, opname);
+ if (opcode)
+ {
+ int cpumatch;
+ opcode = find_opcode_match (opcode, tok, &ntok, &cpumatch);
+ if (opcode)
+ {
+ assemble_insn (opcode, tok, ntok, insn);
+ return;
+ }
+ else if (cpumatch)
+ as_bad ("inappropriate arguments for opcode `%s'", opname);
+ else
+ as_bad ("opcode `%s' not supported for target %s", opname,
+ alpha_target_name);
+ }
+ else
+ as_bad ("unknown opcode `%s'", opname);
}
+/*
+ * Given an opcode name and a pre-tokenized set of arguments,
+ * take the opcode all the way through emission.
+ */
+
static void
-emit_add64 (in, out, num)
- int in, out;
- bfd_vma num;
+assemble_tokens (opname, tok, ntok, local_macros_on)
+ const char *opname;
+ const expressionS *tok;
+ int ntok;
+ int local_macros_on;
{
- bfd_signed_vma snum = num;
+ int found_something = 0;
+ const struct alpha_opcode *opcode;
+ const struct alpha_macro *macro;
+ int cpumatch = 1;
- if (in_range_signed (num, 16))
- {
- emit_lda_n (out, num, in);
- return;
- }
- if ((num & 0xffff) == 0
- && in == ZERO
- && in_range_signed (snum >> 16, 16))
+ /* search macros */
+ if (local_macros_on)
{
- emit_ldah_num (out, snum >> 16, in);
- return;
- }
- /* I'm not sure this one is getting invoked when it could. */
- if ((num & 1) == 0 && in == ZERO)
- {
- if (in_range_signed (snum >> 1, 16))
+ macro = ((const struct alpha_macro *)
+ hash_find (alpha_macro_hash, opname));
+ if (macro)
{
- emit_lda_n (out, snum >> 1, in);
- emit_addq_r (out, out, out);
- return;
+ found_something = 1;
+ macro = find_macro_match (macro, tok, &ntok);
+ if (macro)
+ {
+ (*macro->emit) (tok, ntok, macro->arg);
+ return;
+ }
}
- else if (num & 0x1fffe == 0
- && in_range_signed (snum >> 17, 16))
+ }
+
+ /* search opcodes */
+ opcode = (const struct alpha_opcode *) hash_find (alpha_opcode_hash, opname);
+ if (opcode)
+ {
+ found_something = 1;
+ opcode = find_opcode_match (opcode, tok, &ntok, &cpumatch);
+ if (opcode)
{
- emit_ldah_num (out, snum >> 17, in);
- emit_addq_r (out, out, out);
+ struct alpha_insn insn;
+ assemble_insn (opcode, tok, ntok, &insn);
+ emit_insn (&insn);
return;
}
}
- if (in_range_signed (num, 32))
- {
- bfd_vma lo = num & 0xffff;
- if (lo & 0x8000)
- lo -= 0x10000;
- num -= lo;
- emit_ldah_num (out, snum >> 16, in);
- if (lo)
- emit_lda_n (out, lo, out);
- return;
- }
+
+ if (found_something)
+ if (cpumatch)
+ as_bad ("inappropriate arguments for opcode `%s'", opname);
+ else
+ as_bad ("opcode `%s' not supported for target %s", opname,
+ alpha_target_name);
+ else
+ as_bad ("unknown opcode `%s'", opname);
+}
- if (in != ZERO && in != AT && out != AT && at_ok)
- {
- emit_add64 (ZERO, AT, num);
- emit_addq_r (AT, in, out);
- return;
- }
+\f
+/* Some instruction sets indexed by lg(size) */
+static const char * const sextX_op[] = { "sextb", "sextw", "sextl", NULL };
+static const char * const insXl_op[] = { "insbl", "inswl", "insll", "insql" };
+static const char * const insXh_op[] = { NULL, "inswh", "inslh", "insqh" };
+static const char * const extXl_op[] = { "extbl", "extwl", "extll", "extql" };
+static const char * const extXh_op[] = { NULL, "extwh", "extlh", "extqh" };
+static const char * const mskXl_op[] = { "mskbl", "mskwl", "mskll", "mskql" };
+static const char * const mskXh_op[] = { NULL, "mskwh", "msklh", "mskqh" };
+
+static void
+emit_ldgp (tok, ntok, unused)
+ const expressionS *tok;
+ int ntok;
+ void *unused;
+{
+#ifdef OBJ_AOUT
+FIXME
+#endif
+#if defined(OBJ_ECOFF) || defined(OBJ_ELF)
+ /* from "ldgp r1,n(r2)", generate "ldah r1,X(R2); lda r1,Y(r1)"
+ with appropriate constants and relocations. */
+ struct alpha_insn insn;
+ expressionS newtok[3];
+ expressionS addend;
+
+ /* We're going to need this symbol in md_apply_fix(). */
+ (void) section_symbol (absolute_section);
+
+#ifdef OBJ_ECOFF
+ if (regno (tok[2].X_add_number) == AXP_REG_PV)
+ ecoff_set_gp_prolog_size (0);
+#endif
- if (in != ZERO)
- as_bad ("load expression too complex to expand");
+ newtok[0] = tok[0];
+ set_tok_const (newtok[1], 0);
+ newtok[2] = tok[2];
- /* Could check also for loading 16- or 32-bit value and shifting by
- arbitrary displacement. */
+ assemble_tokens_to_insn ("ldah", newtok, 3, &insn);
- {
- bfd_vma lo = snum & 0xffffffff;
- if (lo & 0x80000000)
- lo -= ((bfd_vma)0x10000000 << 4);
- snum -= lo;
- emit_add64 (ZERO, out, snum >> 32);
- emit_sll_n (out, 32, out);
- if (lo != 0)
- emit_add64 (out, out, lo);
- }
+ addend = tok[1];
+
+#ifdef OBJ_ECOFF
+ assert (addend.X_op == O_constant);
+ addend.X_op = O_symbol;
+ addend.X_add_symbol = alpha_gp_symbol;
+#endif
+
+ insn.nfixups = 1;
+ insn.fixups[0].exp = addend;
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_GPDISP_HI16;
+
+ emit_insn (&insn);
+
+ set_tok_preg (newtok[2], tok[0].X_add_number);
+
+ assemble_tokens_to_insn ("lda", newtok, 3, &insn);
+
+#ifdef OBJ_ECOFF
+ addend.X_add_number += 4;
+#endif
+
+ insn.nfixups = 1;
+ insn.fixups[0].exp = addend;
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_GPDISP_LO16;
+
+ emit_insn (&insn);
+#endif /* OBJ_ECOFF || OBJ_ELF */
}
static int
-alpha_ip (str, insns)
- char *str;
- struct alpha_it insns[];
+load_expression (targreg, exp, pbasereg, poffset)
+ int targreg;
+ const expressionS *exp;
+ int *pbasereg;
+ expressionS *poffset;
{
- char *s;
- const char *args;
- char c;
- unsigned long i;
- struct alpha_opcode *pattern;
- char *argsStart;
- unsigned int opcode;
- unsigned int mask = 0;
- int match = 0, num_gen = 1;
- int comma = 0;
- int do_add64, add64_in = 0, add64_out = 0;
- bfd_vma add64_addend = 0;
-
- for (s = str;
- islower (*s) || *s == '_' || *s == '/' || *s == '4' || *s == '8';
- ++s)
- ;
- switch (*s)
- {
-
- case '\0':
+ int emit_lituse = 0;
+ offsetT addend = exp->X_add_number;
+ int basereg = *pbasereg;
+ struct alpha_insn insn;
+ expressionS newtok[3];
+
+ switch (exp->X_op)
+ {
+ case O_symbol:
+ {
+#ifdef OBJ_ECOFF
+ offsetT lit;
+
+ /* attempt to reduce .lit load by splitting the offset from
+ its symbol when possible, but don't create a situation in
+ which we'd fail. */
+ if (!range_signed_32 (addend) &&
+ (alpha_noat_on || targreg == AXP_REG_AT))
+ {
+ lit = add_to_literal_pool (exp->X_add_symbol, addend,
+ alpha_lita_section, 8);
+ addend = 0;
+ }
+ else
+ {
+ lit = add_to_literal_pool (exp->X_add_symbol, 0,
+ alpha_lita_section, 8);
+ }
+
+ if (lit >= 0x8000)
+ as_fatal ("overflow in literal (.lita) table");
+
+ /* emit "ldq r, lit(gp)" */
+
+ if (basereg != alpha_gp_register && targreg == basereg)
+ {
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+ if (targreg == AXP_REG_AT)
+ as_bad ("macro requires $at while $at in use");
+
+ set_tok_reg (newtok[0], AXP_REG_AT);
+ }
+ else
+ set_tok_reg (newtok[0], targreg);
+ set_tok_sym (newtok[1], alpha_lita_symbol, lit);
+ set_tok_preg (newtok[2], alpha_gp_register);
+
+ assemble_tokens_to_insn ("ldq", newtok, 3, &insn);
+
+ assert (insn.nfixups == 1);
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_LITERAL;
+#endif /* OBJ_ECOFF */
+#ifdef OBJ_ELF
+ /* emit "ldq r, gotoff(gp)" */
+
+ if (basereg != alpha_gp_register && targreg == basereg)
+ {
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+ if (targreg == AXP_REG_AT)
+ as_bad ("macro requires $at while $at in use");
+
+ set_tok_reg (newtok[0], AXP_REG_AT);
+ }
+ else
+ set_tok_reg (newtok[0], targreg);
+
+ if (!range_signed_32 (addend)
+ && (alpha_noat_on || targreg == AXP_REG_AT))
+ {
+ newtok[1] = *exp;
+ addend = 0;
+ }
+ else
+ {
+ set_tok_sym (newtok[1], exp->X_add_symbol, 0);
+ }
+
+ set_tok_preg (newtok[2], alpha_gp_register);
+
+ assemble_tokens_to_insn ("ldq", newtok, 3, &insn);
+
+ assert (insn.nfixups == 1);
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_LITERAL;
+#endif /* OBJ_ELF */
+
+ emit_insn(&insn);
+ emit_lituse = 1;
+
+ if (basereg != alpha_gp_register && basereg != AXP_REG_ZERO)
+ {
+ /* emit "addq r, base, r" */
+
+ set_tok_reg (newtok[1], basereg);
+ set_tok_reg (newtok[2], targreg);
+ assemble_tokens ("addq", newtok, 3, 0);
+ }
+
+ basereg = targreg;
+ }
break;
- case ',':
- comma = 1;
+ case O_constant:
+ break;
- /*FALLTHROUGH*/
+ case O_subtract:
+ /* Assume that this difference expression will be resolved to an
+ absolute value and that that value will fit in 16 bits. */
- case ' ':
- *s++ = '\0';
- break;
+ set_tok_reg (newtok[0], targreg);
+ newtok[1] = *exp;
+ set_tok_preg (newtok[2], basereg);
+ assemble_tokens ("lda", newtok, 3, 0);
+
+ if (poffset)
+ set_tok_const (*poffset, 0);
+ return 0;
default:
- as_fatal ("Unknown opcode: `%s'", str);
- }
- if ((pattern = (struct alpha_opcode *) hash_find (op_hash, str)) == NULL)
- {
- as_bad ("Unknown opcode: `%s'", str);
- return -1;
+ abort();
}
- if (comma)
- *--s = ',';
- argsStart = s;
- for (;;)
+ if (!range_signed_32 (addend))
{
- do_add64 = 0;
- opcode = pattern->match;
- num_gen = 1;
- for (i = 0; i < MAX_INSNS; i++)
- insns[i] = clear_insn;
+ offsetT lit;
- /* Build the opcode, checking as we go to make sure that the
- operands match. */
- for (args = pattern->args;; ++args)
+ /* for 64-bit addends, just put it in the literal pool */
+
+ if (alpha_lit8_section == NULL)
{
- switch (*args)
- {
+ create_literal_section (".lit8",
+ &alpha_lit8_section,
+ &alpha_lit8_symbol);
+ }
- case '\0': /* end of args */
- if (*s == '\0')
- {
- match = 1;
- }
- break;
+ lit = add_to_literal_pool (NULL, addend, alpha_lit8_section, 8) - 0x8000;
+ if (lit >= 0x8000)
+ as_fatal ("overflow in literal (.lit8) table");
- case '+':
- if (*s == '+')
- {
- ++s;
- continue;
- }
- if (*s == '-')
- {
- continue;
- }
- break;
+ /* emit "ldq litreg, .lit8+lit" */
- case '(': /* these must match exactly */
- case ')':
- case ',':
- case ' ':
- case '0':
- if (*s++ == *args)
- continue;
- break;
+ if (targreg == basereg)
+ {
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+ if (targreg == AXP_REG_AT)
+ as_bad ("macro requires $at while $at in use");
- case '1': /* next operand must be a register */
- case '2':
- case '3':
- case 'r':
- case 'R':
- if (*s++ == '$')
- {
- switch (c = *s++)
- {
-
- case 'a': /* $at: as temporary */
- if (*s++ != 't')
- goto error;
- mask = AT;
- break;
-
- case 'g': /* $gp: base register */
- if (*s++ != 'p')
- goto error;
- mask = base_register;
- break;
-
- case 's': /* $sp: stack pointer */
- if (*s++ != 'p')
- goto error;
- mask = SP;
- break;
-
-
- case 'r': /* any register */
- if (!isdigit (c = *s++))
- {
- goto error;
- }
- /* FALLTHROUGH */
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7':
- case '8':
- case '9':
- if (isdigit (*s))
- {
- if ((c = 10 * (c - '0') + (*s++ - '0')) >= 32)
- {
- goto error;
- }
- }
- else
- {
- c -= '0';
- }
- if ((c == GP) && first_32bit_quadrant)
- c = ZERO;
-
- mask = c;
- break;
-
- default:
- goto error;
- }
- note_gpreg (mask);
- /* Got the register, now figure out where it goes in
- the opcode. */
- doregister:
- switch (*args)
- {
-
- case '1':
- case 'e':
- opcode |= mask << SA;
- continue;
-
- case '2':
- case 'f':
- opcode |= mask << SB;
- continue;
-
- case '3':
- case 'g':
- opcode |= mask;
- continue;
-
- case 'r':
- opcode |= (mask << SA) | mask;
- continue;
-
- case 'R': /* ra and rb are the same */
- opcode |= (mask << SA) | (mask << SB);
- continue;
-
- case 'E':
- opcode |= (mask << SA) | (mask << SB) | (mask);
- continue;
- }
- }
- break;
+ set_tok_reg (newtok[0], AXP_REG_AT);
+ }
+ else
+ set_tok_reg (newtok[0], targreg);
+ set_tok_sym (newtok[1], alpha_lit8_symbol, lit);
- case 'e': /* next operand is a floating point register */
- case 'f':
- case 'g':
- case 'E':
- if (*s++ == '$' && *s++ == 'f' && isdigit (*s))
- {
- mask = *s++;
- if (isdigit (*s))
- {
- mask = 10 * (mask - '0') + (*s++ - '0');
- if (mask >= 32)
- {
- break;
- }
- }
- else
- {
- mask -= '0';
- }
- note_fpreg (mask);
- /* same encoding as gp registers */
- goto doregister;
- }
- break;
+ assemble_tokens ("ldq", newtok, 2, 1); /* note this does recurse */
-#if 0
- case 'h': /* bits 16..31 */
- insns[0].reloc = RELOC_16_31;
- goto immediate;
-#endif
+ /* emit "addq litreg, base, target" */
- case 'l': /* bits 0..15 */
- insns[0].reloc[0].code = BFD_RELOC_16;
- goto immediate;
-
- case 'L': /* 21 bit PC relative immediate */
- insns[0].reloc[0].code = BFD_RELOC_23_PCREL_S2;
- insns[0].reloc[0].pcrel = 1;
- goto immediate;
-
- case 'i': /* 14 bit immediate */
- if (OPCODE (opcode) != 0x1a)
- /* Not a jmp variant?? */
- abort ();
- else if (opcode & 0x8000)
- /* ret or jsr_coroutine */
- {
- insns[0].reloc[0].code = BFD_RELOC_14;
- insns[0].reloc[0].pcrel = 0;
- }
- else
- /* jmp or jsr */
- {
- insns[0].reloc[0].code = BFD_RELOC_ALPHA_HINT;
- insns[0].reloc[0].pcrel = 1;
- }
- goto immediate;
-
- case 'b': /* 8 bit immediate */
- insns[0].reloc[0].code = BFD_RELOC_8;
- goto immediate;
-
- case 'I': /* 26 bit immediate, for PALcode */
- insns[0].reloc[0].code = BFD_RELOC_26;
- goto immediate;
-
- case 't': /* 12 bit displacement, for PALcode */
- insns[0].reloc[0].code = BFD_RELOC_12_PCREL;
- goto immediate;
-
- case '8': /* 8 bit 0...7 */
- insns[0].reloc[0].code = BFD_RELOC_8;
- goto immediate;
-
- immediate:
- if (*s == ' ')
- s++;
- getExpression (s, &insns[0]);
- s = expr_end;
- /* Handle overflow in certain instructions by converting
- to other instructions. */
- if (insns[0].reloc[0].code == BFD_RELOC_8
- && insns[0].reloc[0].exp.X_op == O_constant
- && (insns[0].reloc[0].exp.X_add_number < 0
- || insns[0].reloc[0].exp.X_add_number > 0xff))
- {
- if (OPCODE (opcode) == 0x10
- && (OP_FCN (opcode) == 0x00 /* addl */
- || OP_FCN (opcode) == 0x40 /* addl/v */
- || OP_FCN (opcode) == 0x20 /* addq */
- || OP_FCN (opcode) == 0x60 /* addq/v */
- || OP_FCN (opcode) == 0x09 /* subl */
- || OP_FCN (opcode) == 0x49 /* subl/v */
- || OP_FCN (opcode) == 0x29 /* subq */
- || OP_FCN (opcode) == 0x69 /* subq/v */
- || OP_FCN (opcode) == 0x02 /* s4addl */
- || OP_FCN (opcode) == 0x22 /* s4addq */
- || OP_FCN (opcode) == 0x0b /* s4subl */
- || OP_FCN (opcode) == 0x2b /* s4subq */
- || OP_FCN (opcode) == 0x12 /* s8addl */
- || OP_FCN (opcode) == 0x32 /* s8addq */
- || OP_FCN (opcode) == 0x1b /* s8subl */
- || OP_FCN (opcode) == 0x3b /* s8subq */
- )
- /* Can we make it fit by negating? */
- && -insns[0].reloc[0].exp.X_add_number < 0xff
- && -insns[0].reloc[0].exp.X_add_number > 0)
- {
- opcode ^= 0x120; /* convert add<=>sub */
- insns[0].reloc[0].exp.X_add_number *= -1;
- }
- else if (at_ok && macro_ok)
- {
- /* Constant value supplied, but it's too large. */
- do_add64 = 1;
- add64_in = ZERO;
- add64_out = AT;
- add64_addend = insns[0].reloc[0].exp.X_add_number;
- opcode &= ~ 0x1000;
- opcode |= (AT << SB);
- insns[0].reloc[0].code = BFD_RELOC_NONE;
- }
- else
- as_bad ("overflow in 8-bit literal field in `operate' format insn");
- }
- else if (insns[0].reloc[0].code == BFD_RELOC_16
- && insns[0].reloc[0].exp.X_op == O_constant
- && !in_range_signed (insns[0].reloc[0].exp.X_add_number,
- 16))
- {
- bfd_vma val = insns[0].reloc[0].exp.X_add_number;
- if (OPCODE (opcode) == 0x08)
- {
- do_add64 = 1;
- add64_in = ZERO;
- add64_out = AT;
- add64_addend = val;
- opcode &= ~0x1000;
- opcode |= (AT << SB);
- insns[0].reloc[0].code = BFD_RELOC_NONE;
- }
- else if (OPCODE (opcode) == 0x09
- && in_range_signed (val >> 16, 16))
- {
- /* ldah with high operand - convert to low */
- insns[0].reloc[0].exp.X_add_number >>= 16;
- }
- else
- as_bad ("I don't know how to handle 32+ bit constants here yet, sorry.");
- }
- else if (insns[0].reloc[0].code == BFD_RELOC_32
- && insns[0].reloc[0].exp.X_op == O_constant)
- {
- bfd_vma val = insns[0].reloc[0].exp.X_add_number;
- bfd_signed_vma sval = val;
- if (val >> 32 != 0
- && sval >> 32 != 0
- && sval >> 32 != -1)
- as_bad ("I don't know how to handle 64 bit constants here yet, sorry.");
- }
- continue;
+ if (basereg != AXP_REG_ZERO)
+ {
+ set_tok_reg (newtok[1], basereg);
+ set_tok_reg (newtok[2], targreg);
+ assemble_tokens ("addq", newtok, 3, 0);
+ }
- case 'F':
- {
- int format, length, mode, i;
- char temp[20 /*MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT*/];
- char *err;
- static const char formats[4] = "FGfd";
- bfd_vma bits, offset;
- char *old_input_line_pointer = input_line_pointer;
-
- input_line_pointer = s;
- SKIP_WHITESPACE ();
- memset (temp, 0, sizeof (temp));
- mode = (opcode >> 26) & 3;
- format = formats[mode];
- err = md_atof (format, temp, &length);
- if (err)
- {
- as_bad ("Bad floating literal: %s", err);
- bits = 0;
- }
- else
- {
- /* Generate little-endian number from byte sequence. */
- bits = 0;
- for (i = length - 1; i >= 0; i--)
- bits += ((bfd_vma)(temp[i] & 0xff)) << (i * 8);
- }
- switch (length)
- {
- case 8:
- offset = get_lit8_offset (bits) - 0x8000;
- insns[0].reloc[0].exp.X_add_symbol = lit8_sym;
- insns[0].reloc[0].exp.X_add_number = 0x8000;
- break;
- case 4:
- offset = get_lit4_offset (bits) - 0x8000;
- insns[0].reloc[0].exp.X_add_symbol = lit4_sym;
- insns[0].reloc[0].exp.X_add_number = 0x8000;
- break;
- default:
- abort ();
- }
- insns[0].reloc[0].exp.X_op = O_symbol;
- offset &= 0xffff;
- num_gen = load_expression (AT, &insns[0]);
- if (lituse_pending)
- {
- insns[num_gen].reloc[0].code = BFD_RELOC_ALPHA_LITUSE;
- insns[num_gen].reloc[0].exp = lituse_basereg;
- lituse_pending = 0;
- }
- insns[num_gen++].opcode = opcode | (AT << SB) | offset;
- opcode = insns[0].opcode;
- s = input_line_pointer;
- input_line_pointer = old_input_line_pointer;
- }
- continue;
+ if (poffset)
+ set_tok_const (*poffset, 0);
+ *pbasereg = targreg;
+ }
+ else
+ {
+ offsetT low, high, extra, tmp;
- /* The following two.. take advantage of the fact that
- opcode already contains most of what we need to know.
- We just prepend to the instr an "ldah
- $r,%ml(expr)($base)" and turn this one (done later
- after we return) into something like "stq
- $r,%lo(expr)(at)" or "ldq $r,%lo(expr)($r)".
-
- NOTE: This can fail later on at link time if the
- offset from $base actually turns out to be more than
- 2**31 or 2**47 if use_large_offsets is set. */
- case 'P': /* Addressing macros: PUT */
- mask = AT; /* register 'at' */
- /* fall through */
-
- case 'G': /* Addressing macros: GET */
- /* All it is missing is the expression, which is what we
- will get now */
-
- if (*s == ' ')
- s++;
- getExpression (s, &insns[0]);
- s = expr_end;
-
- /* Must check for "lda ..,number" too */
- if (insns[0].reloc[0].exp.X_op == O_big)
- {
- as_warn ("Sorry, not yet. Put bignums in .data section yourself.");
- return -1;
- }
- if (insns[0].reloc[0].exp.X_op == O_constant)
- {
- bfd_vma val = insns[0].reloc[0].exp.X_add_number;
- bfd_vma top, low;
-
- insns[0].reloc[0].code = BFD_RELOC_NONE;
- insns[1].reloc[0].code = BFD_RELOC_NONE;
-
- low = val & 0xffff;
- if (low & 0x8000)
- low -= 0x10000;
- top = val - low;
- if (top)
- {
- do_add64 = 1;
- add64_in = ZERO;
- add64_out = AT;
- add64_addend = top;
- opcode |= AT << SB;
- }
- else
- opcode |= ZERO << SB;
- opcode &= ~0x1000;
- opcode |= low & 0xffff;
- }
- else if (insns[0].reloc[0].exp.X_op == O_symbol)
- {
- unsigned long old_opcode = opcode;
- int tmp_reg = -1;
-
- if (!macro_ok)
- as_bad ("insn requires expansion but `nomacro' specified");
- else if (*args == 'G')
- tmp_reg = mask;
- else if (!at_ok)
- as_bad ("insn expansion requires AT use, but `noat' specified");
- else
- tmp_reg = AT;
- num_gen = load_expression (tmp_reg, insns);
- opcode = insns[0].opcode;
- /* lda is opcode 8, 0x20000000, and the macros that use
- this code have an opcode field of 0. The latter
- require further processing, and we don't have the
- true opcode here. */
- if (OPCODE (old_opcode) != 0
- && OPCODE (old_opcode) != 0x08)
- {
- struct alpha_it *i;
- i = &insns[num_gen++];
- i->opcode = old_opcode | (tmp_reg << SB);
-
- if (lituse_pending)
- {
- i->reloc[0].code = BFD_RELOC_ALPHA_LITUSE;
- i->reloc[0].exp = lituse_basereg;
- lituse_pending = 0;
- }
- }
- }
- else
- {
- /* Not a number */
- num_gen = 2;
- insns[1].reloc[0].exp = insns[0].reloc[0].exp;
+ /* for 32-bit operands, break up the addend */
- /* Generate: ldah REG,x1(GP); OP ?,x0(REG) */
+ low = sign_extend_16 (addend);
+ tmp = addend - low;
+ high = sign_extend_16 (tmp >> 16);
- abort (); /* relocs need fixing */
-#if 0
- insns[1].reloc = RELOC_0_15;
- insns[1].opcode = opcode | mask << SB;
+ if (tmp - (high << 16))
+ {
+ extra = 0x4000;
+ tmp -= 0x40000000;
+ high = sign_extend_16 (tmp >> 16);
+ }
+ else
+ extra = 0;
- insns[0].reloc = RELOC_16_31;
- opcode = 0x24000000 /*ldah*/ | mask << SA | (base_register << SB);
-#endif
- }
+ set_tok_reg (newtok[0], targreg);
+ set_tok_preg (newtok[2], basereg);
- continue;
+ if (extra)
+ {
+ /* emit "ldah r, extra(r) */
+ set_tok_const (newtok[1], extra);
+ assemble_tokens ("ldah", newtok, 3, 0);
+ set_tok_preg (newtok[2], basereg = targreg);
+ }
- /* Same failure modes as above, actually most of the
- same code shared. */
- case 'B': /* Builtins */
- args++;
- switch (*args)
- {
+ if (high)
+ {
+ /* emit "ldah r, high(r) */
+ set_tok_const (newtok[1], high);
+ assemble_tokens ("ldah", newtok, 3, 0);
+ basereg = targreg;
+ set_tok_preg (newtok[2], basereg);
+ }
- case 'a': /* ldgp */
-
- if (first_32bit_quadrant || no_mixed_code)
- return -1;
- switch (OUTPUT_FLAVOR)
- {
- case bfd_target_aout_flavour:
- /* this is cmu's a.out version */
- insns[0].reloc[0].code = BFD_RELOC_NONE;
- /* generate "zap %r,0xf,%r" to take high 32 bits */
- opcode |= 0x48001600 /* zap ?,#,?*/ | (0xf << SN);
- break;
- case bfd_target_ecoff_flavour:
- /* Given "ldgp R1,N(R2)", turn it into something
- like "ldah R1,###(R2) ; lda R1,###(R1)" with
- appropriate constants and relocations. */
- {
- unsigned long r1, r2;
- unsigned long addend = 0;
-
- num_gen = 2;
- r2 = mask;
- r1 = opcode & 0x3f;
- insns[0].reloc[0].code = BFD_RELOC_ALPHA_GPDISP_HI16;
- insns[0].reloc[0].pcrel = 1;
- insns[0].reloc[0].exp.X_op = O_symbol;
- insns[0].reloc[0].exp.X_add_symbol = gp;
- insns[0].reloc[0].exp.X_add_number = 0;
- insns[0].opcode = (0x24000000 /* ldah */
- | (r1 << SA)
- | (r2 << SB));
- insns[1].reloc[0].code = BFD_RELOC_ALPHA_GPDISP_LO16;
- insns[1].reloc[0].exp.X_op = O_symbol;
- insns[1].reloc[0].exp.X_add_symbol = gp;
- insns[1].reloc[0].exp.X_add_number = 4;
- insns[1].reloc[0].pcrel = 1;
- insns[1].opcode = 0x20000000 | (r1 << SA) | (r1 << SB);
- opcode = insns[0].opcode;
- /* merge in addend */
- insns[1].opcode |= addend & 0xffff;
- insns[0].opcode |= ((addend >> 16)
- + (addend & 0x8000 ? 1 : 0));
- if (r2 == PV)
- ecoff_set_gp_prolog_size (0);
- }
- break;
- default:
- abort ();
- }
- continue;
-
-
- case 'b': /* setgp */
- switch (OUTPUT_FLAVOR)
- {
- case bfd_target_aout_flavour:
- /* generate "zap %r,0xf,$gp" to take high 32 bits */
- opcode |= 0x48001600 /* zap ?,#,?*/
- | (0xf << SN) | (base_register);
- break;
- default:
- abort ();
- }
- continue;
-
- case 'c': /* jsr $r,foo becomes
- lda $27,foo
- jsr $r,($27),foo
- Register 27, t12, is used by convention
- here. */
- {
- struct alpha_it *jsr;
- expressionS etmp;
- struct reloc_data *r;
-
- /* We still have to parse the function name */
- if (*s == ' ')
- s++;
- getExpression (s, &insns[0]);
- etmp = insns[0].reloc[0].exp;
- s = expr_end;
- num_gen = load_expression (PV, &insns[0]);
- note_gpreg (PV);
-
- jsr = &insns[num_gen++];
- jsr->opcode = (pattern->match
- | (mask << SA)
- | (PV << SB)
- | 0);
- if (lituse_pending)
- {
- /* LITUSE wasn't emitted yet */
- jsr->reloc[0].code = BFD_RELOC_ALPHA_LITUSE;
- jsr->reloc[0].exp = lituse_jsr;
- r = &jsr->reloc[1];
- lituse_pending = 0;
- }
- else
- r = &jsr->reloc[0];
- r->exp = etmp;
- r->code = BFD_RELOC_ALPHA_HINT;
- r->pcrel = 1;
- opcode = insns[0].opcode;
- }
- continue;
-
- case 'd':
- /* Sub-word loads and stores. We load the address into
- $at, which might involve using the `P' parameter
- processing too, then emit a sequence to get the job
- done, using unaligned memory accesses and byte
- manipulation, with t9 and t10 as temporaries. */
- {
- /* Characteristics of access. */
- int is_load = 99, is_unsigned = 0, is_unaligned = 0;
- int mode_size, mode;
- /* Register operand. */
- int reg = -1;
- /* Addend for loads and stores. */
- valueT addend;
- /* Which register do we use for the address? */
- int addr;
-
- {
- /* Pick apart name and set flags. */
- const char *s = pattern->name;
-
- if (*s == 'u')
- {
- is_unaligned = 1;
- s++;
- }
-
- if (s[0] == 'l' && s[1] == 'd')
- is_load = 1;
- else if (s[0] == 's' && s[1] == 't')
- is_load = 0;
- else
- as_fatal ("unrecognized sub-word access insn `%s'",
- str);
- s += 2;
-
- mode = *s++;
- if (mode == 'b') mode_size = 1;
- else if (mode == 'w') mode_size = 2;
- else if (mode == 'l') mode_size = 4;
- else if (mode == 'q') mode_size = 8;
- else abort ();
-
- if (*s == 'u')
- {
- is_unsigned = 1;
- s++;
- }
-
- assert (*s == 0);
-
- /* Longwords are always kept sign-extended. */
- if (mode == 'l' && is_unsigned)
- abort ();
- /* There's no special unaligned byte handling. */
- if (mode == 'b' && is_unaligned)
- abort ();
- /* Stores don't care about signedness. */
- if (!is_load && is_unsigned)
- abort ();
- }
-
- if (args[-2] == 'P')
- {
- addr = AT;
- addend = 0;
- }
- else
- {
- /* foo r1,num(r2)
- r2 -> mask
- r1 -> (opcode >> SA) & 31
- num -> insns->reloc[0].*
-
- We want to emit "lda at,num(r2)", since these
- operations require the use of a single register
- with the starting address of the memory operand
- we want to access.
-
- We could probably get away without doing this
- (and use r2 below, with the addend for the
- actual reads and writes) in cases where the
- addend is known to be a multiple of 8. */
- int r2 = mask;
- int r1 = (opcode >> SA) & 31;
-
- if (insns[0].reloc[0].code == BFD_RELOC_NONE)
- addend = 0;
- else if (insns[0].reloc[0].code == BFD_RELOC_16)
- {
- if (insns[0].reloc[0].exp.X_op != O_constant)
- abort ();
- addend = insns[0].reloc[0].exp.X_add_number;
- }
- else
- abort ();
-
- if (addend + mode_size - 1 < 0x7fff
- && (addend % 8) == 0
- && (r2 < T9 || r2 > T12))
- {
- addr = r2;
- num_gen = 0;
- }
- else
- {
- /* Let later relocation processing deal
- with the addend field. */
- insns[num_gen-1].opcode = (0x20000000 /* lda */
- | (AT << SA)
- | (r2 << SB));
- addr = AT;
- addend = 0;
- }
- reg = r1;
- }
-
- /* Because the emit_* routines append directly to
- the current frag, we now need to flush any
- pending insns. */
- {
- int i;
- for (i = 0; i < num_gen; i++)
- emit_insn (&insns[i]);
- num_gen = 0;
- }
-
- if (is_load)
- {
- int reg2, reg3 = -1;
-
- if (is_unaligned)
- reg2 = T9, reg3 = T10;
- else
- reg2 = reg;
-
- emit_load_unal (addr, addend, T9);
- if (is_unaligned)
- emit_load_unal (addr, addend + mode_size - 1, T10);
- emit_extract_r (T9, addr, reg2, mode, 'l');
- if (is_unaligned)
- {
- emit_extract_r (T10, addr, reg3, mode, 'h');
- emit_bis_r (T9, T10, reg);
- }
- if (!is_unsigned)
- emit_sign_extend (reg, mode_size * 8);
- }
- else
- {
- /* The second word gets processed first
- because if the address does turn out to be
- aligned, the processing for the second word
- will be pushing around all-zeros, and the
- entire value will be handled as the `first'
- word. So we want to store the `first' word
- last. */
- /* Pair these up so that the memory loads get
- separated from each other, as well as being
- well in advance of the uses of the values
- loaded. */
- if (is_unaligned)
- {
- emit_load_unal (addr, addend + mode_size - 1, T11);
- emit_insert_r (reg, addr, T12, mode, 'h');
- }
- emit_load_unal (addr, addend, T9);
- emit_insert_r (reg, addr, T10, mode, 'l');
- if (is_unaligned)
- emit_mask_r (T12, addr, T12, mode, 'h');
- emit_mask_r (T10, addr, T10, mode, 'l');
- if (is_unaligned)
- emit_bis_r (T11, T12, T11);
- emit_bis_r (T9, T10, T9);
- if (is_unaligned)
- emit_store_unal (addr, addend + mode_size - 1, T11);
- emit_store_unal (addr, addend, T9);
- }
- }
- return 0;
-
- /* DIVISION and MODULUS. Yech.
- Convert OP x,y,result
- to mov x,t10
- mov y,t11
- jsr t9, __OP
- mov t12,result
-
- with appropriate optimizations if t10,t11,t12
- are the registers specified by the compiler.
- We are missing an obvious optimization
- opportunity here; if the ldq generated by the
- jsr assembly requires a cycle or two to make
- the value available, initiating it before one
- or two of the mov instructions would result in
- faster execution. */
- case '0': /* reml */
- case '1': /* divl */
- case '2': /* remq */
- case '3': /* divq */
- case '4': /* remlu */
- case '5': /* divlu */
- case '6': /* remqu */
- case '7': /* divqu */
- {
- static char func[8][6] = {
- "reml", "divl", "remq", "divq",
- "remlu", "divlu", "remqu", "divqu"
- };
- char expansion[64];
- int reg;
-
- /* All regs parsed, in opcode */
-
- /* Do the expansions, one instr at a time */
-
- reg = (opcode >> SA) & 31;
- if (reg != T10)
- {
- /* x->t10 */
- sprintf (expansion, "mov $%d,$%d", reg, T10);
- md_assemble (expansion);
- }
- reg = (opcode >> SB) & 31;
- if (reg == T10)
- /* we already overwrote it! */
- abort ();
- else if (reg != T11)
- {
- /* y->t11 */
- sprintf (expansion, "mov $%d,$%d", reg, T11);
- md_assemble (expansion);
- }
- sprintf (expansion, "lda $%d,__%s", PV, func[*args - '0']);
- md_assemble (expansion);
- sprintf (expansion, "jsr $%d,($%d),__%s", T9, PV,
- func[*args - '0']);
- md_assemble (expansion);
-#if 0 /* huh? */
- if (!first_32bit_quadrant)
- {
- sprintf (expansion,
- "zap $%d,0xf,$%d",
- T9, base_register);
- md_assemble (expansion);
- }
-#endif
- sprintf (expansion, "ldgp $%d,0($%d)",
- base_register, T9);
- md_assemble (expansion);
-
- /* Use insns[0] to get at the result */
- if ((reg = (opcode & 31)) != PV)
- opcode = (0x47e00400 /* or zero,zero,zero */
- | (PV << SB)
- | reg /* Rc */ ); /* pv->z */
- else
- num_gen = 0;
- }
- continue;
- }
- /* fall through */
+ if ((low && !poffset) || (!poffset && basereg != targreg))
+ {
+ /* emit "lda r, low(base)" */
+ set_tok_const (newtok[1], low);
+ assemble_tokens ("lda", newtok, 3, 0);
+ basereg = targreg;
+ low = 0;
+ }
- default:
- abort ();
- }
- break;
- }
- error:
- if (match == 0)
- {
- /* Args don't match. */
- if (&pattern[1] - alpha_opcodes < NUMOPCODES
- && !strcmp (pattern->name, pattern[1].name))
- {
- ++pattern;
- s = argsStart;
- continue;
- }
- else
- {
- as_warn ("Illegal operands");
- return -1;
- }
- }
- else
+ if (poffset)
+ set_tok_const (*poffset, low);
+ *pbasereg = basereg;
+ }
+
+ return emit_lituse;
+}
+
+static void
+emit_lda (tok, ntok, unused)
+ const expressionS *tok;
+ int ntok;
+ void *unused;
+{
+ int basereg;
+
+ if (ntok == 2)
+ basereg = (tok[1].X_op == O_constant ? AXP_REG_ZERO : alpha_gp_register);
+ else
+ basereg = tok[2].X_add_number;
+
+ (void) load_expression (tok[0].X_add_number, &tok[1], &basereg, NULL);
+}
+
+static void
+emit_ldah (tok, ntok, unused)
+ const expressionS *tok;
+ int ntok;
+ void *unused;
+{
+ expressionS newtok[3];
+
+ newtok[0] = tok[0];
+ newtok[1] = tok[1];
+ set_tok_preg (newtok[2], AXP_REG_ZERO);
+
+ assemble_tokens ("ldah", newtok, 3, 0);
+}
+
+static void
+emit_ir_load (tok, ntok, opname)
+ const expressionS *tok;
+ int ntok;
+ void *opname;
+{
+ int basereg, lituse;
+ expressionS newtok[3];
+ struct alpha_insn insn;
+
+ if (ntok == 2)
+ basereg = (tok[1].X_op == O_constant ? AXP_REG_ZERO : alpha_gp_register);
+ else
+ basereg = tok[2].X_add_number;
+
+ lituse = load_expression (tok[0].X_add_number, &tok[1], &basereg,
+ &newtok[1]);
+
+ newtok[0] = tok[0];
+ set_tok_preg (newtok[2], basereg);
+
+ assemble_tokens_to_insn ((const char *)opname, newtok, 3, &insn);
+
+ if (lituse)
+ {
+ assert (insn.nfixups < MAX_INSN_FIXUPS);
+ if (insn.nfixups > 0)
{
- /* Args match, see if a float instructions and -nofloats */
- if (nofloats && pattern->isa_float)
- return -1;
+ memmove (&insn.fixups[1], &insn.fixups[0],
+ sizeof(struct alpha_fixup) * insn.nfixups);
}
- break;
+ insn.nfixups++;
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_LITUSE;
+ insn.fixups[0].exp.X_op = O_constant;
+ insn.fixups[0].exp.X_add_number = 1;
}
- if (do_add64)
+ emit_insn (&insn);
+}
+
+static void
+emit_loadstore (tok, ntok, opname)
+ const expressionS *tok;
+ int ntok;
+ void *opname;
+{
+ int basereg, lituse;
+ expressionS newtok[3];
+ struct alpha_insn insn;
+
+ if (ntok == 2)
+ basereg = (tok[1].X_op == O_constant ? AXP_REG_ZERO : alpha_gp_register);
+ else
+ basereg = tok[2].X_add_number;
+
+ if (tok[1].X_op != O_constant || !range_signed_16(tok[1].X_add_number))
+ {
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+
+ lituse = load_expression (AXP_REG_AT, &tok[1], &basereg, &newtok[1]);
+ }
+ else
+ {
+ newtok[1] = tok[1];
+ lituse = 0;
+ }
+
+ newtok[0] = tok[0];
+ set_tok_preg (newtok[2], basereg);
+
+ assemble_tokens_to_insn ((const char *)opname, newtok, 3, &insn);
+
+ if (lituse)
{
- /* If opcode represents an addq instruction, and the addend we
- are using fits in a 16 bit range, we can change the addq
- directly into an lda rather than emitting an lda followed by
- an addq. */
- if (OPCODE (opcode) == 0x10
- && OP_FCN (opcode) == 0x20 /* addq */
- && add64_in == ZERO
- && add64_out == AT
- && in_range_signed (add64_addend, 16))
+ assert (insn.nfixups < MAX_INSN_FIXUPS);
+ if (insn.nfixups > 0)
{
- opcode = (0x20000000 /* lda */
- | (((opcode >> SC) & 0x1f) << SA)
- | (((opcode >> SA) & 0x1f) << SB)
- | (add64_addend & 0xffff));
+ memmove (&insn.fixups[1], &insn.fixups[0],
+ sizeof(struct alpha_fixup) * insn.nfixups);
}
- else
- emit_add64 (add64_in, add64_out, add64_addend);
+ insn.nfixups++;
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_LITUSE;
+ insn.fixups[0].exp.X_op = O_constant;
+ insn.fixups[0].exp.X_add_number = 1;
}
- insns[0].opcode = opcode;
- return num_gen;
+ emit_insn (&insn);
}
-/* Turn a string in input_line_pointer into a floating point constant
- of type type, and store the appropriate bytes in *litP. The number
- of LITTLENUMS emitted is stored in *sizeP. An error message is
- returned, or NULL on OK. */
+static void
+emit_ldXu (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
+{
+ expressionS newtok[3];
-/* Equal to MAX_PRECISION in atof-ieee.c */
-#define MAX_LITTLENUMS 6
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+
+ /* emit "lda $at, exp" */
-char *
-md_atof (type, litP, sizeP)
- char type;
- char *litP;
- int *sizeP;
+ memcpy (newtok, tok, sizeof(expressionS)*ntok);
+ newtok[0].X_add_number = AXP_REG_AT;
+ assemble_tokens ("lda", newtok, ntok, 1);
+
+ /* emit "ldq_u targ, 0($at)" */
+
+ newtok[0] = tok[0];
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "extXl targ, $at, targ" */
+
+ set_tok_reg (newtok[1], AXP_REG_AT);
+ newtok[2] = newtok[0];
+ assemble_tokens (extXl_op[(long)vlgsize], newtok, 3, 1);
+}
+
+static void
+emit_ldX (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
{
- int prec;
- LITTLENUM_TYPE words[MAX_LITTLENUMS];
- LITTLENUM_TYPE *wordP;
- char *t;
- char *atof_ieee (), *vax_md_atof ();
+ emit_ldXu (tok, ntok, vlgsize);
+ assemble_tokens (sextX_op[(long)vlgsize], tok, 1, 1);
+}
- switch (type)
+static void
+emit_uldXu (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
+{
+ long lgsize = (long)vlgsize;
+ expressionS newtok[3];
+
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
+
+ /* emit "lda $at, exp" */
+
+ memcpy (newtok, tok, sizeof(expressionS)*ntok);
+ newtok[0].X_add_number = AXP_REG_AT;
+ assemble_tokens ("lda", newtok, ntok, 1);
+
+ /* emit "ldq_u $t9, 0($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "ldq_u $t10, size-1($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_const (newtok[1], (1<<lgsize)-1);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "extXl $t9, $at, $t9" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_reg (newtok[1], AXP_REG_AT);
+ set_tok_reg (newtok[2], AXP_REG_T9);
+ assemble_tokens (extXl_op[lgsize], newtok, 3, 1);
+
+ /* emit "extXh $t10, $at, $t10" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_reg (newtok[2], AXP_REG_T10);
+ assemble_tokens (extXh_op[lgsize], newtok, 3, 1);
+
+ /* emit "or $t9, $t10, targ" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_reg (newtok[1], AXP_REG_T10);
+ newtok[2] = tok[0];
+ assemble_tokens ("or", newtok, 3, 1);
+}
+
+static void
+emit_uldX (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
+{
+ emit_uldXu (tok, ntok, vlgsize);
+ assemble_tokens (sextX_op[(long)vlgsize], tok, 1, 1);
+}
+
+static void
+emit_ldil (tok, ntok, unused)
+ const expressionS *tok;
+ int ntok;
+ void *unused;
+{
+ expressionS newtok[2];
+
+ memcpy (newtok, tok, sizeof(newtok));
+ newtok[1].X_add_number = sign_extend_32 (tok[1].X_add_number);
+
+ assemble_tokens ("lda", newtok, ntok, 1);
+}
+
+static void
+emit_stX (tok, ntok, vlgsize)
+ const expressionS *tok;
+ void *vlgsize;
+{
+ int lgsize = (int)(long)vlgsize;
+ expressionS newtok[3];
+
+ if (alpha_noat_on)
+ as_bad("macro requires $at register while noat in effect");
+
+ /* emit "lda $at, exp" */
+
+ memcpy (newtok, tok, sizeof(expressionS)*ntok);
+ newtok[0].X_add_number = AXP_REG_AT;
+ assemble_tokens ("lda", newtok, ntok, 1);
+
+ /* emit "ldq_u $t9, 0($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "insXl src, $at, $t10" */
+
+ newtok[0] = tok[0];
+ set_tok_reg (newtok[1], AXP_REG_AT);
+ set_tok_reg (newtok[2], AXP_REG_T10);
+ assemble_tokens (insXl_op[lgsize], newtok, 3, 1);
+
+ /* emit "mskXl $t9, $at, $t9" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ newtok[2] = newtok[0];
+ assemble_tokens (mskXl_op[lgsize], newtok, 3, 1);
+
+ /* emit "or $t9, $t10, $t9" */
+
+ set_tok_reg (newtok[1], AXP_REG_T10);
+ assemble_tokens ("or", newtok, 3, 1);
+
+ /* emit "stq_u $t9, 0($at) */
+
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("stq_u", newtok, 3, 1);
+}
+
+static void
+emit_ustX (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
+{
+ int lgsize = (int)(long)vlgsize;
+ expressionS newtok[3];
+
+ /* emit "lda $at, exp" */
+
+ memcpy (newtok, tok, sizeof(expressionS)*ntok);
+ newtok[0].X_add_number = AXP_REG_AT;
+ assemble_tokens ("lda", newtok, ntok, 1);
+
+ /* emit "ldq_u $9, 0($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "ldq_u $10, size-1($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_const (newtok[1], (1 << lgsize)-1);
+ assemble_tokens ("ldq_u", newtok, 3, 1);
+
+ /* emit "insXl src, $at, $t11" */
+
+ newtok[0] = tok[0];
+ set_tok_reg (newtok[1], AXP_REG_AT);
+ set_tok_reg (newtok[2], AXP_REG_T11);
+ assemble_tokens (insXl_op[lgsize], newtok, 3, 1);
+
+ /* emit "insXh src, $at, $t12" */
+
+ set_tok_reg (newtok[2], AXP_REG_T12);
+ assemble_tokens (insXh_op[lgsize], newtok, 3, 1);
+
+ /* emit "mskXl $t9, $at, $t9" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ newtok[2] = newtok[0];
+ assemble_tokens (mskXl_op[lgsize], newtok, 3, 1);
+
+ /* emit "mskXh $t10, $at, $t10" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ newtok[2] = newtok[0];
+ assemble_tokens (mskXh_op[lgsize], newtok, 3, 1);
+
+ /* emit "or $t9, $t11, $t9" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_reg (newtok[1], AXP_REG_T11);
+ newtok[2] = newtok[0];
+ assemble_tokens ("or", newtok, 3, 1);
+
+ /* emit "or $t10, $t12, $t10" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_reg (newtok[1], AXP_REG_T12);
+ newtok[2] = newtok[0];
+ assemble_tokens ("or", newtok, 3, 1);
+
+ /* emit "stq_u $t9, 0($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_AT);
+ assemble_tokens ("stq_u", newtok, 3, 1);
+
+ /* emit "stq_u $t10, size-1($at)" */
+
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_const (newtok[1], (1 << lgsize)-1);
+ assemble_tokens ("stq_u", newtok, 3, 1);
+}
+
+static void
+emit_sextX (tok, ntok, vlgsize)
+ const expressionS *tok;
+ int ntok;
+ void *vlgsize;
+{
+ int bitshift = 64 - 8*(1 << (long)vlgsize);
+ expressionS newtok[3];
+
+ /* emit "sll src,bits,dst" */
+
+ newtok[0] = tok[0];
+ set_tok_const (newtok[1], bitshift);
+ newtok[2] = tok[ntok - 1];
+ assemble_tokens ("sll", newtok, 3, 1);
+
+ /* emit "sra dst,bits,dst" */
+
+ newtok[0] = newtok[2];
+ assemble_tokens ("sra", newtok, 3, 1);
+}
+
+static void
+emit_division (tok, ntok, symname)
+ const expressionS *tok;
+ int ntok;
+ void *symname;
+{
+ /* DIVISION and MODULUS. Yech.
+ * Convert
+ * OP x,y,result
+ * to
+ * lda pv,__OP
+ * mov x,t10
+ * mov y,t11
+ * jsr t9,(pv),__OP
+ * mov t12,result
+ *
+ * with appropriate optimizations if t10,t11,t12 are the registers
+ * specified by the compiler.
+ */
+
+ int xr, yr, rr;
+ symbolS *sym;
+ expressionS newtok[3];
+
+ xr = regno (tok[0].X_add_number);
+ yr = regno (tok[1].X_add_number);
+
+ if (ntok < 3)
+ rr = xr;
+ else
+ rr = regno (tok[2].X_add_number);
+
+ sym = symbol_find_or_make ((const char *)symname);
+
+ /* Move the operands into the right place */
+ if (yr == AXP_REG_T10 && xr == AXP_REG_T11)
{
- /* VAX floats */
- case 'G':
- /* VAX md_atof doesn't like "G" for some reason. */
- type = 'g';
- case 'F':
- case 'D':
- return vax_md_atof (type, litP, sizeP);
+ /* They are in exactly the wrong order -- swap through AT */
- /* IEEE floats */
- case 'f':
- prec = 2;
- break;
+ if (alpha_noat_on)
+ as_bad ("macro requires $at register while noat in effect");
- case 'd':
- prec = 4;
- break;
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_reg (newtok[1], AXP_REG_AT);
+ assemble_tokens ("mov", newtok, 2, 1);
- case 'x':
- case 'X':
- prec = 6;
- break;
+ set_tok_reg (newtok[0], AXP_REG_T11);
+ set_tok_reg (newtok[1], AXP_REG_T10);
+ assemble_tokens ("mov", newtok, 2, 1);
- case 'p':
- case 'P':
- prec = 6;
- break;
+ set_tok_reg (newtok[0], AXP_REG_AT);
+ set_tok_reg (newtok[1], AXP_REG_T11);
+ assemble_tokens ("mov", newtok, 2, 1);
+ }
+ else
+ {
+ if (yr == AXP_REG_T10)
+ {
+ set_tok_reg (newtok[0], AXP_REG_T10);
+ set_tok_reg (newtok[1], AXP_REG_T11);
+ assemble_tokens ("mov", newtok, 2, 1);
+ }
- default:
- *sizeP = 0;
- return "Bad call to MD_ATOF()";
+ if (xr != AXP_REG_T10)
+ {
+ set_tok_reg (newtok[0], xr);
+ set_tok_reg (newtok[1], AXP_REG_T10);
+ assemble_tokens ("mov", newtok, 2, 1);
+ }
+
+ if (yr != AXP_REG_T10 && yr != AXP_REG_T11)
+ {
+ set_tok_reg (newtok[0], yr);
+ set_tok_reg (newtok[1], AXP_REG_T11);
+ assemble_tokens ("mov", newtok, 2, 1);
+ }
}
- t = atof_ieee (input_line_pointer, type, words);
- if (t)
- input_line_pointer = t;
- *sizeP = prec * sizeof (LITTLENUM_TYPE);
- for (wordP = words + prec - 1; prec--;)
+ /* Call the division routine */
+ set_tok_reg (newtok[0], AXP_REG_T9);
+ set_tok_sym (newtok[1], sym, 0);
+ assemble_tokens ("jsr", newtok, 2, 1);
+
+ /* Reload the GP register */
+#ifdef OBJ_AOUT
+FIXME
+#endif
+#if defined(OBJ_ECOFF) || defined(OBJ_ELF)
+ set_tok_reg (newtok[0], alpha_gp_register);
+ set_tok_const (newtok[1], 0);
+ set_tok_preg (newtok[2], AXP_REG_T9);
+ assemble_tokens ("ldgp", newtok, 3, 1);
+#endif
+
+ /* Move the result to the right place */
+ if (rr != AXP_REG_T12)
{
- md_number_to_chars (litP, (long) (*wordP--), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
+ set_tok_reg (newtok[0], AXP_REG_T12);
+ set_tok_reg (newtok[1], rr);
+ assemble_tokens ("mov", newtok, 2, 1);
}
-
- return 0;
}
-void
-md_bignum_to_chars (buf, bignum, nchars)
- char *buf;
- LITTLENUM_TYPE *bignum;
- int nchars;
+static void
+emit_jsrjmp (tok, ntok, vopname)
+ const expressionS *tok;
+ int ntok;
+ void *vopname;
{
- while (nchars)
+ const char *opname = (const char *) vopname;
+ struct alpha_insn insn;
+ expressionS newtok[3];
+ int r, tokidx = 0, lituse = 0;
+
+ if (tokidx < ntok && tok[tokidx].X_op == O_register)
+ r = regno (tok[tokidx++].X_add_number);
+ else
+ r = strcmp (opname, "jmp") == 0 ? AXP_REG_ZERO : AXP_REG_RA;
+
+ set_tok_reg (newtok[0], r);
+
+ if (tokidx < ntok &&
+ (tok[tokidx].X_op == O_pregister || tok[tokidx].X_op == O_cpregister))
+ r = regno (tok[tokidx++].X_add_number);
+ else
{
- LITTLENUM_TYPE work = *bignum++;
- int nb = CHARS_PER_LITTLENUM;
+ int basereg = alpha_gp_register;
+ lituse = load_expression (r = AXP_REG_PV, &tok[tokidx], &basereg, NULL);
+ }
- do
+ set_tok_cpreg (newtok[1], r);
+
+ if (tokidx < ntok)
+ newtok[2] = tok[tokidx];
+ else
+ set_tok_const (newtok[2], 0);
+
+ assemble_tokens_to_insn (opname, newtok, 3, &insn);
+
+ /* add the LITUSE fixup */
+ if (lituse)
+ {
+ assert (insn.nfixups < MAX_INSN_FIXUPS);
+ if (insn.nfixups > 0)
{
- *buf++ = work & ((1 << BITS_PER_CHAR) - 1);
- if (--nchars == 0)
- return;
- work >>= BITS_PER_CHAR;
+ memmove (&insn.fixups[1], &insn.fixups[0],
+ sizeof(struct alpha_fixup) * insn.nfixups);
}
- while (--nb);
+ insn.nfixups++;
+ insn.fixups[0].reloc = BFD_RELOC_ALPHA_LITUSE;
+ insn.fixups[0].exp.X_op = O_constant;
+ insn.fixups[0].exp.X_add_number = 3;
}
+
+ emit_insn (&insn);
+}
+
+static void
+emit_retjcr (tok, ntok, vopname)
+ const expressionS *tok;
+ int ntok;
+ void *vopname;
+{
+ const char *opname = (const char *)vopname;
+ expressionS newtok[3];
+ int r, tokidx = 0;
+
+ if (tokidx < ntok && tok[tokidx].X_op == O_register)
+ r = regno (tok[tokidx++].X_add_number);
+ else
+ r = AXP_REG_ZERO;
+
+ set_tok_reg (newtok[0], r);
+
+ if (tokidx < ntok &&
+ (tok[tokidx].X_op == O_pregister || tok[tokidx].X_op == O_cpregister))
+ r = regno (tok[tokidx++].X_add_number);
+ else
+ r = AXP_REG_RA;
+
+ set_tok_cpreg (newtok[1], r);
+
+ if (tokidx < ntok)
+ newtok[2] = tok[tokidx];
+ else
+ set_tok_const (newtok[2], strcmp(opname, "ret") == 0);
+
+ assemble_tokens (opname, newtok, 3, 0);
}
\f
-CONST char *md_shortopts = "Fm:g";
-struct option md_longopts[] = {
-#define OPTION_32ADDR (OPTION_MD_BASE)
- {"32addr", no_argument, NULL, OPTION_32ADDR},
- {NULL, no_argument, NULL, 0}
-};
-size_t md_longopts_size = sizeof(md_longopts);
+/* Assembler directives */
+
+/*
+ * Handle the .text pseudo-op. This is like the usual one, but it
+ * clears alpha_insn_label and restores auto alignment.
+ */
+
+static void
+s_alpha_text (i)
+ int i;
-int
-md_parse_option (c, arg)
- int c;
- char *arg;
{
- switch (c)
+ s_text (i);
+ alpha_insn_label = NULL;
+ alpha_auto_align_on = 1;
+}
+
+/*
+ * Handle the .data pseudo-op. This is like the usual one, but it
+ * clears alpha_insn_label and restores auto alignment.
+ */
+
+static void
+s_alpha_data (i)
+ int i;
+{
+ s_data (i);
+ alpha_insn_label = NULL;
+ alpha_auto_align_on = 1;
+}
+
+#ifndef OBJ_ELF
+
+static void
+s_alpha_comm (ignore)
+ int ignore;
+{
+ register char *name;
+ register char c;
+ register char *p;
+ offsetT temp;
+ register symbolS *symbolP;
+
+ name = input_line_pointer;
+ c = get_symbol_end ();
+
+ /* just after name is now '\0' */
+ p = input_line_pointer;
+ *p = c;
+
+ SKIP_WHITESPACE ();
+
+ /* Alpha OSF/1 compiler doesn't provide the comma, gcc does. */
+ if (*input_line_pointer == ',')
{
- case 'F':
- nofloats = 1;
- break;
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
+ }
+ if ((temp = get_absolute_expression ()) < 0)
+ {
+ as_warn (".COMMon length (%ld.) <0! Ignored.", (long) temp);
+ ignore_rest_of_line ();
+ return;
+ }
- case OPTION_32ADDR:
- addr32 = 1;
- break;
+ *p = 0;
+ symbolP = symbol_find_or_make (name);
+ *p = c;
- case 'g':
- /* Ignore `-g' so gcc can provide this option to the Digital
- UNIX assembler, which otherwise would throw away info that
- mips-tfile needs. */
- break;
+ if (S_IS_DEFINED (symbolP))
+ {
+ as_bad ("Ignoring attempt to re-define symbol");
+ ignore_rest_of_line ();
+ return;
+ }
+ if (S_GET_VALUE (symbolP))
+ {
+ if (S_GET_VALUE (symbolP) != (valueT) temp)
+ as_bad ("Length of .comm \"%s\" is already %ld. Not changed to %ld.",
+ S_GET_NAME (symbolP),
+ (long) S_GET_VALUE (symbolP),
+ (long) temp);
+ }
+ else
+ {
+ S_SET_VALUE (symbolP, (valueT) temp);
+ S_SET_EXTERNAL (symbolP);
+ }
+
+ know (symbolP->sy_frag == &zero_address_frag);
+ demand_empty_rest_of_line ();
+}
+
+#endif
+
+static void
+s_alpha_rdata (ignore)
+ int ignore;
+{
+ int temp;
+
+ temp = get_absolute_expression ();
+ subseg_new (".rdata", 0);
+ demand_empty_rest_of_line ();
+ alpha_insn_label = NULL;
+ alpha_auto_align_on = 1;
+}
+
+static void
+s_alpha_sdata (ignore)
+ int ignore;
+{
+ int temp;
+ temp = get_absolute_expression ();
+ subseg_new (".sdata", 0);
+ demand_empty_rest_of_line ();
+ alpha_insn_label = NULL;
+ alpha_auto_align_on = 1;
+}
+
+static void
+s_alpha_gprel32 (ignore)
+ int ignore;
+{
+ expressionS e;
+ char *p;
+
+ SKIP_WHITESPACE ();
+ expression (&e);
+
+#ifdef OBJ_ELF
+ switch (e.X_op)
+ {
+ case O_constant:
+ e.X_add_symbol = section_symbol(absolute_section);
+ e.X_op = O_symbol;
+ /* FALLTHRU */
+ case O_symbol:
+ break;
default:
- return 0;
+ abort();
}
+#else
+ switch (e.X_op)
+ {
+ case O_constant:
+ e.X_add_symbol = section_symbol (absolute_section);
+ /* fall through */
+ case O_symbol:
+ e.X_op = O_subtract;
+ e.X_op_symbol = alpha_gp_symbol;
+ break;
+ default:
+ abort ();
+ }
+#endif
- return 1;
+ if (alpha_auto_align_on)
+ alpha_align (2, (char *) NULL, alpha_insn_label);
+ alpha_insn_label = NULL;
+
+ p = frag_more (4);
+ memset (p, 0, 4);
+ fix_new_exp (frag_now, p-frag_now->fr_literal, 4,
+ &e, 0, BFD_RELOC_GPREL32);
}
-void
-md_show_usage (stream)
- FILE *stream;
+/*
+ * Handle floating point allocation pseudo-ops. This is like the
+ * generic vresion, but it makes sure the current label, if any, is
+ * correctly aligned.
+ */
+
+static void
+s_alpha_float_cons (type)
+ int type;
{
- fprintf(stream, "\
-Alpha options:\n\
--32addr treat addresses as 32-bit values\n\
--F lack floating point instructions support\n\
--m21064 | -m21066 | -m21164\n\
- specify variant of Alpha architecture\n");
+ if (alpha_auto_align_on)
+ {
+ int log_size;
+
+ switch (type)
+ {
+ default:
+ case 'f':
+ case 'F':
+ log_size = 2;
+ break;
+
+ case 'd':
+ case 'D':
+ case 'G':
+ log_size = 3;
+ break;
+
+ case 'x':
+ case 'X':
+ case 'p':
+ case 'P':
+ log_size = 4;
+ break;
+ }
+
+ alpha_align (log_size, (char *) NULL, alpha_insn_label);
+ }
+
+ alpha_insn_label = NULL;
+ float_cons (type);
}
-\f
+
static void
-s_proc (is_static)
+s_alpha_proc (is_static)
int is_static;
{
/* XXXX Align to cache linesize XXXXX */
if (!strcmp ("reorder", s))
/* ignore */ ;
else if (!strcmp ("at", s))
- at_ok = yesno;
+ alpha_noat_on = !yesno;
else if (!strcmp ("macro", s))
- macro_ok = yesno;
+ alpha_macros_on = yesno;
else if (!strcmp ("move", s))
/* ignore */ ;
else if (!strcmp ("volatile", s))
/* ignore */ ;
else
as_warn ("Tried to .set unrecognized mode `%s'", name);
+
*input_line_pointer = ch;
demand_empty_rest_of_line ();
}
-/* @@ Is this right?? */
-long
-md_pcrel_from (fixP)
- fixS *fixP;
+static void
+s_alpha_base (ignore)
+ int ignore;
{
- valueT addr = fixP->fx_where + fixP->fx_frag->fr_address;
- switch (fixP->fx_r_type)
+#if 0
+ if (first_32bit_quadrant)
{
- case BFD_RELOC_ALPHA_GPDISP_HI16:
- case BFD_RELOC_ALPHA_GPDISP_LO16:
- return addr;
- default:
- return fixP->fx_size + addr;
+ /* not fatal, but it might not work in the end */
+ as_warn ("File overrides no-base-register option.");
+ first_32bit_quadrant = 0;
+ }
+#endif
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == '$')
+ { /* $rNN form */
+ input_line_pointer++;
+ if (*input_line_pointer == 'r')
+ input_line_pointer++;
}
+
+ alpha_gp_register = get_absolute_expression ();
+ if (alpha_gp_register < 0 || alpha_gp_register > 31)
+ {
+ alpha_gp_register = AXP_REG_GP;
+ as_warn ("Bad base register, using $%d.", alpha_gp_register);
+ }
+
+ demand_empty_rest_of_line ();
}
-/* Handle the .align pseudo-op. This aligns to a power of two. It
- also adjusts any current instruction label. We treat this the same
- way the MIPS port does: .align 0 turns off auto alignment. */
+/*
+ * Handle the .align pseudo-op. This aligns to a power of two. It
+ * also adjusts any current instruction label. We treat this the same
+ * way the MIPS port does: .align 0 turns off auto alignment.
+ */
static void
s_alpha_align (ignore)
int ignore;
{
- register int temp;
- register long temp_fill;
+ int align;
+ char fill, *pfill;
long max_alignment = 15;
- temp = get_absolute_expression ();
- if (temp > max_alignment)
- as_bad ("Alignment too large: %d. assumed.", temp = max_alignment);
- else if (temp < 0)
+ align = get_absolute_expression ();
+ if (align > max_alignment)
{
- as_warn ("Alignment negative: 0 assumed.");
- temp = 0;
+ align = max_alignment;
+ as_bad ("Alignment too large: %d. assumed", align);
+ }
+ else if (align < 0)
+ {
+ as_warn ("Alignment negative: 0 assumed");
+ align = 0;
}
+
if (*input_line_pointer == ',')
{
input_line_pointer++;
- temp_fill = get_absolute_expression ();
+ fill = get_absolute_expression ();
+ pfill = &fill;
}
else
- temp_fill = 0;
- if (temp)
+ pfill = NULL;
+
+ if (align != 0)
{
- auto_align = 1;
- alpha_align (temp, (int) temp_fill, insn_label);
+ alpha_auto_align_on = 1;
+ alpha_align (align, pfill, alpha_insn_label);
}
else
{
- auto_align = 0;
+ alpha_auto_align_on = 0;
}
demand_empty_rest_of_line ();
}
-static void
-alpha_align (n, fill, label)
- int n;
- int fill;
- symbolS *label;
-{
- if (fill == 0
- && (now_seg == text_section
- || !strcmp (now_seg->name, ".init")
- || !strcmp (now_seg->name, ".fini"))
- && n > 2)
- {
- static const unsigned char nop_pattern[] = { 0x1f, 0x04, 0xff, 0x47 };
- /* First, make sure we're on a four-byte boundary, in case
- someone has been putting .byte values into the text section.
- The DEC assembler silently fills with unaligned no-op
- instructions. This will zero-fill, then nop-fill with proper
- alignment. */
- frag_align (2, fill);
- frag_align_pattern (n, nop_pattern, sizeof (nop_pattern));
- }
- else
- frag_align (n, fill);
-
- if (label != NULL)
- {
- assert (S_GET_SEGMENT (label) == now_seg);
- label->sy_frag = frag_now;
- S_SET_VALUE (label, (valueT) frag_now_fix ());
- }
-}
-
-/* This function is called just before the generic pseudo-ops output
- something. It just clears insn_label. */
-
-void
-alpha_flush_pending_output ()
-{
- insn_label = NULL;
-}
-
-/* Handle data allocation pseudo-ops. This is like the generic
- version, but it makes sure the current label, if any, is correctly
- aligned. */
+/*
+ * Handle data allocation pseudo-ops. This is like the generic
+ * version, but it makes sure the current label, if any, is correctly
+ * aligned.
+ */
static void
s_alpha_cons (log_size)
int log_size;
{
- if (log_size > 0 && auto_align)
- alpha_align (log_size, 0, insn_label);
- insn_label = NULL;
+ if (alpha_auto_align_on && log_size > 0)
+ alpha_align (log_size, (char *) NULL, alpha_insn_label);
+ alpha_insn_label = NULL;
cons (1 << log_size);
}
-/* Handle floating point allocation pseudo-ops. This is like the
- generic vresion, but it makes sure the current label, if any, is
- correctly aligned. */
+\f
+/* The macro table */
+
+const struct alpha_macro alpha_macros[] = {
+/* Load/Store macros */
+ { "lda", emit_lda, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldah", emit_ldah, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_EOA } },
+
+ { "ldl", emit_ir_load, "ldl",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldl_l", emit_ir_load, "ldl_l",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldq", emit_ir_load, "ldq",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldq_l", emit_ir_load, "ldq_l",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldq_u", emit_ir_load, "ldq_u",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldf", emit_loadstore, "ldf",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldg", emit_loadstore, "ldg",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "lds", emit_loadstore, "lds",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldt", emit_loadstore, "ldt",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+
+ { "ldb", emit_ldX, (void *)0,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldbu", emit_ldXu, (void *)0,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldw", emit_ldX, (void *)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldwu", emit_ldXu, (void *)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+
+ { "uldw", emit_uldX, (void*)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "uldwu", emit_uldXu, (void*)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "uldl", emit_uldX, (void*)2,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "uldlu", emit_uldXu, (void*)2,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "uldq", emit_uldXu, (void*)3,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+
+ { "ldgp", emit_ldgp, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA } },
+
+ { "ldi", emit_lda, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldil", emit_ldil, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ldiq", emit_lda, NULL,
+ { MACRO_IR, MACRO_EXP, MACRO_EOA } },
+#if 0
+ { "ldif" emit_ldiq, NULL,
+ { MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldid" emit_ldiq, NULL,
+ { MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldig" emit_ldiq, NULL,
+ { MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldis" emit_ldiq, NULL,
+ { MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "ldit" emit_ldiq, NULL,
+ { MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+#endif
-static void
-s_alpha_float_cons (type)
- int type;
+ { "stl", emit_loadstore, "stl",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stl_c", emit_loadstore, "stl_c",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stq", emit_loadstore, "stq",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stq_c", emit_loadstore, "stq_c",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stq_u", emit_loadstore, "stq_u",
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stf", emit_loadstore, "stf",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "stg", emit_loadstore, "stg",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "sts", emit_loadstore, "sts",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+ { "stt", emit_loadstore, "stt",
+ { MACRO_FPR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_FPR, MACRO_EXP, MACRO_EOA } },
+
+ { "stb", emit_stX, (void*)0,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "stw", emit_stX, (void*)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ustw", emit_ustX, (void*)1,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ustl", emit_ustX, (void*)2,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+ { "ustq", emit_ustX, (void*)3,
+ { MACRO_IR, MACRO_EXP, MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA } },
+
+/* Arithmetic macros */
+#if 0
+ { "absl" emit_absl, 1, { IR } },
+ { "absl" emit_absl, 2, { IR, IR } },
+ { "absl" emit_absl, 2, { EXP, IR } },
+ { "absq" emit_absq, 1, { IR } },
+ { "absq" emit_absq, 2, { IR, IR } },
+ { "absq" emit_absq, 2, { EXP, IR } },
+#endif
+
+ { "sextb", emit_sextX, (void *)0,
+ { MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EOA,
+ /* MACRO_EXP, MACRO_IR, MACRO_EOA */ } },
+ { "sextw", emit_sextX, (void *)1,
+ { MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EOA,
+ /* MACRO_EXP, MACRO_IR, MACRO_EOA */ } },
+
+ { "divl", emit_division, "__divl",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "divlu", emit_division, "__divlu",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "divq", emit_division, "__divq",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "divqu", emit_division, "__divqu",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "reml", emit_division, "__reml",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "remlu", emit_division, "__remlu",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "remq", emit_division, "__remq",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+ { "remqu", emit_division, "__remqu",
+ { MACRO_IR, MACRO_IR, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_IR, MACRO_EOA,
+ /* MACRO_IR, MACRO_EXP, MACRO_IR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA */ } },
+
+ { "jsr", emit_jsrjmp, "jsr",
+ { MACRO_PIR, MACRO_EXP, MACRO_EOA,
+ MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA,
+ MACRO_EXP, MACRO_EOA } },
+ { "jmp", emit_jsrjmp, "jmp",
+ { MACRO_PIR, MACRO_EXP, MACRO_EOA,
+ MACRO_PIR, MACRO_EOA,
+ MACRO_IR, MACRO_EXP, MACRO_EOA,
+ MACRO_EXP, MACRO_EOA } },
+ { "ret", emit_retjcr, "ret",
+ { MACRO_IR, MACRO_EXP, MACRO_EOA,
+ MACRO_IR, MACRO_EOA,
+ MACRO_PIR, MACRO_EXP, MACRO_EOA,
+ MACRO_PIR, MACRO_EOA,
+ MACRO_EXP, MACRO_EOA,
+ MACRO_EOA } },
+ { "jcr", emit_retjcr, "jcr",
+ { MACRO_IR, MACRO_EXP, MACRO_EOA,
+ MACRO_IR, MACRO_EOA,
+ MACRO_PIR, MACRO_EXP, MACRO_EOA,
+ MACRO_PIR, MACRO_EOA,
+ MACRO_EXP, MACRO_EOA,
+ MACRO_EOA } },
+ { "jsr_coroutine", emit_retjcr, "jcr",
+ { MACRO_IR, MACRO_EXP, MACRO_EOA,
+ MACRO_IR, MACRO_EOA,
+ MACRO_PIR, MACRO_EXP, MACRO_EOA,
+ MACRO_PIR, MACRO_EOA,
+ MACRO_EXP, MACRO_EOA,
+ MACRO_EOA } },
+};
+
+static const int alpha_num_macros
+ = sizeof(alpha_macros) / sizeof(*alpha_macros);
+
+/* The target specific pseudo-ops which we support. */
+
+const pseudo_typeS md_pseudo_table[] =
{
- if (auto_align)
- {
- int log_size;
+ {"common", s_comm, 0}, /* is this used? */
+#ifndef OBJ_ELF
+ {"comm", s_alpha_comm, 0}, /* osf1 compiler does this */
+#endif
+ {"text", s_alpha_text, 0},
+ {"data", s_alpha_data, 0},
+ {"rdata", s_alpha_rdata, 0},
+ {"sdata", s_alpha_sdata, 0},
+ {"gprel32", s_alpha_gprel32, 0},
+ {"t_floating", s_alpha_float_cons, 'd'},
+ {"s_floating", s_alpha_float_cons, 'f'},
+ {"f_floating", s_alpha_float_cons, 'F'},
+ {"g_floating", s_alpha_float_cons, 'G'},
+ {"d_floating", s_alpha_float_cons, 'D'},
- switch (type)
- {
- default:
- case 'f':
- case 'F':
- log_size = 2;
- break;
+ {"proc", s_alpha_proc, 0},
+ {"aproc", s_alpha_proc, 1},
+ {"set", s_alpha_set, 0},
+ {"reguse", s_ignore, 0},
+ {"livereg", s_ignore, 0},
+ {"base", s_alpha_base, 0}, /*??*/
+ {"option", s_ignore, 0},
+ {"prologue", s_ignore, 0},
+ {"aent", s_ignore, 0},
+ {"ugen", s_ignore, 0},
+ {"eflag", s_ignore, 0},
- case 'd':
- case 'D':
- case 'G':
- log_size = 3;
- break;
+ {"align", s_alpha_align, 0},
+ {"byte", s_alpha_cons, 0},
+ {"hword", s_alpha_cons, 1},
+ {"int", s_alpha_cons, 2},
+ {"long", s_alpha_cons, 2},
+ {"octa", s_alpha_cons, 4},
+ {"quad", s_alpha_cons, 3},
+ {"short", s_alpha_cons, 1},
+ {"word", s_alpha_cons, 1},
+ {"double", s_alpha_float_cons, 'd'},
+ {"float", s_alpha_float_cons, 'f'},
+ {"single", s_alpha_float_cons, 'f'},
- case 'x':
- case 'X':
- case 'p':
- case 'P':
- log_size = 4;
- break;
- }
+/* We don't do any optimizing, so we can safely ignore these. */
+ {"noalias", s_ignore, 0},
+ {"alias", s_ignore, 0},
- alpha_align (log_size, 0, insn_label);
- }
+ {NULL, 0, 0},
+};
- insn_label = NULL;
- float_cons (type);
+\f
+
+static void
+create_literal_section (name, secp, symp)
+ const char *name;
+ segT *secp;
+ symbolS **symp;
+{
+ segT current_section = now_seg;
+ int current_subsec = now_subseg;
+ segT new_sec;
+
+ *secp = new_sec = subseg_new (name, 0);
+ subseg_set (current_section, current_subsec);
+ bfd_set_section_alignment (stdoutput, new_sec, 4);
+ bfd_set_section_flags (stdoutput, new_sec,
+ SEC_RELOC | SEC_ALLOC | SEC_LOAD | SEC_READONLY
+ | SEC_DATA);
+
+ S_CLEAR_EXTERNAL (*symp = section_symbol (new_sec));
}
-/* This function is called whenever a label is defined. It is used to
- adjust the label when an automatic alignment occurs. */
+#ifndef OBJ_ELF
-void
-alpha_define_label (sym)
- symbolS *sym;
+static inline void
+maybe_set_gp (sec)
+ asection *sec;
{
- insn_label = sym;
+ bfd_vma vma;
+ if (!sec)
+ return;
+ vma = bfd_get_section_vma (foo, sec);
+ if (vma && vma < alpha_gp_value)
+ alpha_gp_value = vma;
}
-int
-md_apply_fix (fixP, valueP)
- fixS *fixP;
- valueT *valueP;
+static void
+select_gp_value ()
{
- valueT value;
- int size;
- valueT addend;
- char *p = fixP->fx_frag->fr_literal + fixP->fx_where;
+ assert (alpha_gp_value == 0);
- value = *valueP;
+ /* Get minus-one in whatever width... */
+ alpha_gp_value = 0; alpha_gp_value--;
- switch (fixP->fx_r_type)
- {
- /* The GPDISP relocations are processed internally with a symbol
- referring to the current function; we need to drop in a value
- which, when added to the address of the start of the function,
- gives the desired GP. */
- case BFD_RELOC_ALPHA_GPDISP_HI16:
- case BFD_RELOC_ALPHA_GPDISP_LO16:
- addend = value;
- if (fixP->fx_r_type == BFD_RELOC_ALPHA_GPDISP_HI16)
- {
- assert (fixP->fx_next->fx_r_type == BFD_RELOC_ALPHA_GPDISP_LO16);
-#ifdef DEBUG1
- printf ("hi16: ");
- fprintf_vma (stdout, addend);
- printf ("\n");
-#endif
- if (addend & 0x8000)
- addend += 0x10000;
- addend >>= 16;
- fixP->fx_offset = 4; /* @@ Compute this using fx_next. */
- }
- else
- {
-#ifdef DEBUG1
- printf ("lo16: ");
- fprintf_vma (stdout, addend);
- printf ("\n");
+ /* Select the smallest VMA of these existing sections. */
+ maybe_set_gp (alpha_lita_section);
+/* maybe_set_gp (sdata); Was disabled before -- should we use it? */
+#if 0
+ maybe_set_gp (lit8_sec);
+ maybe_set_gp (lit4_sec);
#endif
- addend &= 0xffff;
- fixP->fx_offset = 0;
- }
- md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where,
- addend, 2);
- fixP->fx_addsy = section_symbol (absolute_section);
- fixP->fx_offset += fixP->fx_frag->fr_address + fixP->fx_where;
- break;
-
- case BFD_RELOC_8:
- /* Write 8 bits, shifted left 13 bit positions. */
- value &= 0xff;
- p++;
- *p &= 0x1f;
- *p |= (value << 5) & 0xe0;
- value >>= 3;
- p++;
- *p &= 0xe0;
- *p |= value;
- value >>= 5;
- fixP->fx_done = 1;
- if (value != 0)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "overflow in type-%d reloc", (int) fixP->fx_r_type);
- return 3;
-
- case BFD_RELOC_32:
- size = 4;
- goto do_it;
- case BFD_RELOC_64:
- size = 8;
- goto do_it;
- case BFD_RELOC_16:
- /* Don't want overflow checking. */
- size = 2;
- do_it:
- if (fixP->fx_pcrel == 0
- && fixP->fx_addsy == 0)
- {
- md_number_to_chars (p, value, size);
- /* @@ Overflow checks?? */
- goto done;
- }
- break;
-
- case BFD_RELOC_26:
- if (fixP->fx_addsy != 0
- && fixP->fx_addsy->bsym->section != absolute_section)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "PALcode instructions require immediate constant function code");
- else if (value >> 26 != 0)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "overflow in 26-bit PALcode function field");
- *p++ = value & 0xff;
- value >>= 8;
- *p++ = value & 0xff;
- value >>= 8;
- *p++ = value & 0xff;
- value >>= 8;
- {
- char x = *p;
- x &= ~3;
- x |= (value & 3);
- *p++ = x;
- }
- goto done;
-
- case BFD_RELOC_14:
- if (fixP->fx_addsy != 0
- && fixP->fx_addsy->bsym->section != absolute_section)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "ret/jsr_coroutine requires constant in displacement field");
- else if (value >> 14 != 0)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- "overflow in 14-bit operand field of ret or jsr_coroutine");
- *p++ = value & 0xff;
- value >>= 8;
- *p = (*p & 0xc0) | (value & 0x3f);
- goto done;
- case BFD_RELOC_23_PCREL_S2:
- /* Write 21 bits only. */
- value >>= 2;
- *p++ = value & 0xff;
- value >>= 8;
- *p++ = value & 0xff;
- value >>= 8;
- *p &= 0xe0;
- *p |= (value & 0x1f);
- goto done;
+/* @@ Will a simple 0x8000 work here? If not, why not? */
+#define GP_ADJUSTMENT (0x8000 - 0x10)
- case BFD_RELOC_12_PCREL:
- *p++ = value & 0xff;
- value >>= 8;
- *p &= 0xf0;
- *p |= (value & 0x0f);
- goto done;
+ alpha_gp_value += GP_ADJUSTMENT;
- case BFD_RELOC_ALPHA_LITERAL:
- case BFD_RELOC_ALPHA_LITUSE:
- return 2;
+ S_SET_VALUE (alpha_gp_symbol, alpha_gp_value);
- case BFD_RELOC_GPREL32:
- assert (fixP->fx_subsy == gp);
- value = - alpha_gp_value; /* huh? this works... */
- fixP->fx_subsy = 0;
- md_number_to_chars (p, value, 4);
- break;
+#ifdef DEBUG1
+ printf ("Chose GP value of %lx\n", alpha_gp_value);
+#endif
+}
+#endif /* !OBJ_ELF */
- case BFD_RELOC_ALPHA_HINT:
- if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
+static void
+alpha_align (n, pfill, label)
+ int n;
+ char *pfill;
+ symbolS *label;
+{
+ if (pfill == NULL)
+ {
+ if (n > 2
+ && (bfd_get_section_flags (stdoutput, now_seg) & SEC_CODE) != 0)
{
- size = 2;
- goto do_it;
+ static char const nop[4] = { 0x1f, 0x04, 0xff, 0x47 };
+
+ /* First, make sure we're on a four-byte boundary, in case
+ someone has been putting .byte values into the text
+ section. The DEC assembler silently fills with unaligned
+ no-op instructions. This will zero-fill, then nop-fill
+ with proper alignment. */
+ frag_align (2, 0);
+ frag_align_pattern (n, nop, sizeof nop);
}
- return 2;
-
- default:
- as_fatal ("unhandled relocation type %s",
- bfd_get_reloc_code_name (fixP->fx_r_type));
- return 9;
+ else
+ frag_align (n, 0);
}
+ else
+ frag_align (n, *pfill);
- if (fixP->fx_addsy == 0 && fixP->fx_pcrel == 0)
+ if (label != NULL)
{
- printf ("type %d reloc done?\n", fixP->fx_r_type);
- done:
- fixP->fx_done = 1;
- return 42;
+ assert (S_GET_SEGMENT (label) == now_seg);
+ label->sy_frag = frag_now;
+ S_SET_VALUE (label, (valueT) frag_now_fix ());
}
- return 0x12345678;
-}
-
-void
-alpha_frob_ecoff_data ()
-{
- select_gp_value ();
- /* $zero and $f31 are read-only */
- alpha_gprmask &= ~1;
- alpha_fprmask &= ~1;
+ record_alignment(now_seg, n);
}
/* The Alpha has support for some VAX floating point types, as well as for
projects / thirdparty / binutils-gdb.git / commitdiff
