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- /* 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.
-
- GAS is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GAS is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- 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. */
-
- /*
- * Mach Operating System
- * Copyright (c) 1993 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie the
- * rights to redistribute these changes.
- */
-
- #include "as.h"
- #include "subsegs.h"
-
- #include "opcode/alpha.h"
-
- #ifdef OBJ_ELF
- #include "elf/alpha.h"
- #endif
-
- #include <ctype.h>
-
-
- /* Local types */
-
- #define MAX_INSN_FIXUPS 2
- #define MAX_INSN_ARGS 5
-
- struct alpha_fixup
- {
- expressionS exp;
- bfd_reloc_code_real_type reloc;
- };
-
- struct alpha_insn
- {
- unsigned insn;
- int nfixups;
- struct alpha_fixup fixups[MAX_INSN_FIXUPS];
- };
-
- enum alpha_macro_arg
- {
- MACRO_EOA = 1, MACRO_IR, MACRO_PIR, MACRO_CPIR, MACRO_FPR, MACRO_EXP
- };
-
- struct alpha_macro
- {
- const char *name;
- void (*emit) PARAMS((const expressionS *, int, void *));
- void *arg;
- enum alpha_macro_arg argsets[16];
- };
-
- /* Two extra symbols we want to see in our input. This is a blatent
- misuse of the expressionS.X_op field. */
-
- #define O_pregister (O_max+1) /* O_register, but in parentheses */
- #define O_cpregister (O_pregister+1) /* + a leading comma */
-
- /* Macros for extracting the type and number of encoded register tokens */
-
- #define is_ir_num(x) (((x) & 32) == 0)
- #define is_fpr_num(x) (((x) & 32) != 0)
- #define regno(x) ((x) & 31)
-
- /* Something odd inherited from the old assembler */
-
- #define note_gpreg(R) (alpha_gprmask |= (1 << (R)))
- #define note_fpreg(R) (alpha_fprmask |= (1 << (R)))
-
- /* Predicates for 16- and 32-bit ranges */
-
- #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)
-
- /* 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. */
-
- #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
-
- /* 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))
-
-
- /* 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 *));
-
-
- /* Generic assembler global variables which must be defined by all
- targets. */
-
- /* 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;
-
- /* Characters which always start a comment. */
- const char comment_chars[] = "#";
-
- /* Characters which start a comment at the beginning of a line. */
- const char line_comment_chars[] = "#";
-
- /* Characters which may be used to separate multiple commands on a
- single line. */
- const char line_separator_chars[] = ";";
-
- /* Characters which are used to indicate an exponent in a floating
- point number. */
- const char EXP_CHARS[] = "eE";
-
- /* 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
-
- 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);
-
-
- /* The cpu for which we are generating code */
- static unsigned alpha_target = AXP_OPCODE_ALL;
- static const char *alpha_target_name = "<all>";
-
- /* Forward declaration of the table of macros */
- static const struct alpha_macro alpha_macros[];
- static const int alpha_num_macros;
-
- /* The hash table of instruction opcodes */
- static struct hash_control *alpha_opcode_hash;
-
- /* The hash table of macro opcodes */
- static struct hash_control *alpha_macro_hash;
-
- #ifdef OBJ_ECOFF
- /* The $gp relocation symbol */
- static symbolS *alpha_gp_symbol;
-
- /* XXX: what is this, and why is it exported? */
- valueT alpha_gp_value;
- #endif
-
- /* The current $gp register */
- static int alpha_gp_register = AXP_REG_GP;
-
- /* A table of the register symbols */
- static symbolS *alpha_register_table[64];
-
- /* 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;
-
- /* Symbols referring to said sections. */
- #ifdef OBJ_ECOFF
- static symbolS *alpha_lita_symbol;
- static symbolS *alpha_lit4_symbol;
- #endif
- static symbolS *alpha_lit8_symbol;
-
- /* Is the assembler not allowed to use $at? */
- static int alpha_noat_on = 0;
-
- /* Are macros enabled? */
- static int alpha_macros_on = 1;
-
- /* Are floats disabled? */
- static int alpha_nofloats_on = 0;
-
- /* Are addresses 32 bit? */
- static int alpha_addr32_on = 0;
-
- /* 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;
-
-
- /* 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 ()
- {
- unsigned int i = 0;
-
- /* Create the opcode hash table */
-
- alpha_opcode_hash = hash_new ();
- for (i = 0; i < alpha_num_opcodes; )
- {
- 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;
- }
-
- /* 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; )
- {
- 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;
- }
-
- /* Create the macro hash table */
-
- alpha_macro_hash = hash_new ();
- for (i = 0; i < alpha_num_macros; )
- {
- 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;
- }
-
- /* Construct symbols for each of the registers */
-
- for (i = 0; i < 32; ++i)
- {
- char name[4];
- sprintf(name, "$%d", i);
- alpha_register_table[i] = symbol_create(name, reg_section, i,
- &zero_address_frag);
- }
- for (; i < 64; ++i)
- {
- char name[5];
- sprintf(name, "$f%d", i-32);
- alpha_register_table[i] = symbol_create(name, reg_section, i,
- &zero_address_frag);
- }
-
- /* Create the special symbols and sections we'll be using */
-
- /* So .sbss will get used for tiny objects. */
- bfd_set_gp_size (stdoutput, 8);
-
- #ifdef OBJ_ECOFF
- create_literal_section (".lita", &alpha_lita_section, &alpha_lita_symbol);
-
- /* 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
-
- #ifdef OBJ_ELF
- if (ECOFF_DEBUGGING)
- {
- 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
- }
- #endif /* OBJ_ELF */
-
- subseg_set(text_section, 0);
- }
-
- /*
- * The public interface to the instruction assembler.
- */
-
- void
- md_assemble (str)
- char *str;
- {
- 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)
- {
- as_bad ("syntax error");
- return;
- }
-
- /* finish it off */
- assemble_tokens (opname, tok, ntok, alpha_macros_on);
- }
-
- valueT
- md_section_align (seg, size)
- segT seg;
- valueT size;
- {
- int align = bfd_get_section_alignment(stdoutput, seg);
- valueT mask = ((valueT)1 << align) - 1;
-
- return (size + mask) & ~mask;
- }
-
- /*
- * 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;
- {
- int prec;
- LITTLENUM_TYPE words[MAX_LITTLENUMS];
- LITTLENUM_TYPE *wordP;
- char *t;
- char *atof_ieee (), *vax_md_atof ();
-
- switch (type)
- {
- /* 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;
-
- case 'd':
- prec = 4;
- break;
-
- case 'x':
- case 'X':
- prec = 6;
- break;
-
- case 'p':
- case 'P':
- prec = 6;
- break;
-
- default:
- *sizeP = 0;
- return "Bad call to MD_ATOF()";
- }
- 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--;)
- {
- md_number_to_chars (litP, (long) (*wordP--), sizeof (LITTLENUM_TYPE));
- litP += sizeof (LITTLENUM_TYPE);
- }
-
- return 0;
- }
-
- void
- md_bignum_to_chars (buf, bignum, nchars)
- char *buf;
- LITTLENUM_TYPE *bignum;
- int nchars;
- {
- while (nchars)
- {
- LITTLENUM_TYPE work = *bignum++;
- int nb = CHARS_PER_LITTLENUM;
-
- do
- {
- *buf++ = work & ((1 << BITS_PER_CHAR) - 1);
- if (--nchars == 0)
- return;
- work >>= BITS_PER_CHAR;
- }
- while (--nb);
- }
- }
-
- int
- md_parse_option (c, arg)
- int c;
- char *arg;
- {
- switch (c)
- {
- case 'F':
- alpha_nofloats_on = 1;
- break;
-
- case OPTION_32ADDR:
- alpha_addr32_on = 1;
- break;
-
- 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;
-
- case 'm':
- {
- static const struct machine
- {
- 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)
- {
- alpha_target_name = p->name, alpha_target = p->flags;
- goto found;
- }
- as_warn("Unknown CPU identifier `%s'", arg);
- found:;
- }
- break;
-
- default:
- return 0;
- }
-
- return 1;
- }
-
- void
- md_show_usage (stream)
- FILE *stream;
- {
- 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);
- }
-
- /* FIXME (inherited): @@ Is this right?? */
-
- long
- md_pcrel_from (fixP)
- fixS *fixP;
- {
- 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;
- }
- }
-
- int
- md_apply_fix (fixP, valueP)
- fixS *fixP;
- valueT *valueP;
- {
- char * const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where;
- valueT value = *valueP;
- unsigned image, size;
-
- 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);
-
- fixP->fx_offset = (next->fx_frag->fr_address + next->fx_where
- - fixP->fx_frag->fr_address - fixP->fx_where);
-
- value = (value - sign_extend_16 (value)) >> 16;
- }
- #ifdef OBJ_ELF
- fixP->fx_r_type = BFD_RELOC_ALPHA_GPDISP;
- #endif
- goto do_reloc_gp;
-
- case BFD_RELOC_ALPHA_GPDISP_LO16:
- value = sign_extend_16 (value);
- fixP->fx_offset = 0;
- #ifdef OBJ_ELF
- fixP->fx_done = 1;
- #endif
-
- 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
- alpha_force_relocation (f)
- fixS *f;
- {
- switch (f->fx_r_type)
- {
- 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_23_PCREL_S2:
- case BFD_RELOC_32:
- case BFD_RELOC_64:
- case BFD_RELOC_ALPHA_HINT:
- return 0;
-
- default:
- assert(f->fx_r_type > BFD_RELOC_UNUSED &&
- f->fx_r_type < BFD_RELOC_UNUSED + alpha_num_operands);
- return 0;
- }
- }
-
- int
- 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_GPREL32:
- return 1;
- default:
- return !alpha_force_relocation (f);
- }
- /*NOTREACHED*/
- }
-
- 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
- if (fixp->fx_r_type == BFD_RELOC_ALPHA_LITERAL)
- {
- /* fake out bfd_perform_relocation. sigh */
- reloc->addend = -alpha_gp_value;
- }
- else
- #endif
- {
- 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
- }
-
- return reloc;
- }
-
- int
- tc_get_register (frame)
- int frame;
- {
- 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;
- }
-
-
- /*
- * Parse the arguments to an opcode
- */
-
- static int
- tokenize_arguments (str, tok, ntok)
- char *str;
- expressionS tok[];
- int ntok;
- {
- expressionS *end_tok = tok + ntok;
- char *old_input_line_pointer;
- int saw_comma = 0, saw_arg = 0;
-
- memset (tok, 0, sizeof(*tok)*ntok);
-
- /* 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;
-
- 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;
- }
-
- /* ... then fall through to plain expression */
- input_line_pointer = hold;
- }
-
- 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;
- }
- }
-
- fini:
- if (saw_comma)
- goto err;
- input_line_pointer = old_input_line_pointer;
- return ntok - (end_tok - tok);
-
- err:
- input_line_pointer = old_input_line_pointer;
- return -1;
- }
-
- /*
- * Search forward through all variants of an opcode
- * looking for a syntax match.
- */
-
- 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;
- {
- const struct alpha_opcode *opcode = first_opcode;
- int ntok = *pntok;
- int got_cpu_match = 0;
-
- do
- {
- const unsigned char *opidx;
- int tokidx = 0;
-
- /* 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)
- {
- 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;
- }
-
- /* possible match -- did we use all of our input? */
- if (tokidx == ntok)
- {
- *pntok = ntok;
- return opcode;
- }
-
- match_failed:;
- }
- while (++opcode-alpha_opcodes < alpha_num_opcodes
- && !strcmp(opcode->name, first_opcode->name));
-
- if (*pcpumatch)
- *pcpumatch = got_cpu_match;
-
- return NULL;
- }
-
- /*
- * 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;
- {
- const struct alpha_macro *macro = first_macro;
- int ntok = *pntok;
-
- do
- {
- const enum alpha_macro_arg *arg = macro->argsets;
- int tokidx = 0;
-
- while (*arg)
- {
- switch (*arg)
- {
- case MACRO_EOA:
- if (tokidx == ntok)
- return macro;
- else
- tokidx = 0;
- break;
-
- 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;
-
- 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));
-
- return NULL;
- }
-
- /*
- * Insert an operand value into an instruction.
- */
-
- static unsigned
- insert_operand(insn, operand, val, file, line)
- unsigned insn;
- const struct alpha_operand *operand;
- offsetT val;
- char *file;
- unsigned line;
- {
- if (operand->bits != 32 && !(operand->flags & AXP_OPERAND_NOOVERFLOW))
- {
- offsetT min, max;
-
- 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;
- }
-
- 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
- assemble_insn(opcode, tok, ntok, insn)
- const struct alpha_opcode *opcode;
- const expressionS *tok;
- int ntok;
- struct alpha_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_insn(insn)
- struct alpha_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
- assemble_tokens_to_insn(opname, tok, ntok, insn)
- const char *opname;
- const expressionS *tok;
- int ntok;
- struct alpha_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
- assemble_tokens (opname, tok, ntok, local_macros_on)
- const char *opname;
- const expressionS *tok;
- int ntok;
- int local_macros_on;
- {
- int found_something = 0;
- const struct alpha_opcode *opcode;
- const struct alpha_macro *macro;
- int cpumatch = 1;
-
- /* search macros */
- if (local_macros_on)
- {
- macro = ((const struct alpha_macro *)
- hash_find (alpha_macro_hash, opname));
- if (macro)
- {
- found_something = 1;
- macro = find_macro_match (macro, tok, &ntok);
- if (macro)
- {
- (*macro->emit) (tok, ntok, macro->arg);
- return;
- }
- }
- }
-
- /* 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)
- {
- struct alpha_insn insn;
- assemble_insn (opcode, tok, ntok, &insn);
- emit_insn (&insn);
- 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);
- }
-
-
- /* 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
-
- newtok[0] = tok[0];
- set_tok_const (newtok[1], 0);
- newtok[2] = tok[2];
-
- assemble_tokens_to_insn ("ldah", newtok, 3, &insn);
-
- 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
- load_expression (targreg, exp, pbasereg, poffset)
- int targreg;
- const expressionS *exp;
- int *pbasereg;
- expressionS *poffset;
- {
- 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 O_constant:
- break;
-
- case O_subtract:
- /* Assume that this difference expression will be resolved to an
- absolute value and that that value will fit in 16 bits. */
-
- 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:
- abort();
- }
-
- if (!range_signed_32 (addend))
- {
- offsetT lit;
-
- /* for 64-bit addends, just put it in the literal pool */
-
- if (alpha_lit8_section == NULL)
- {
- create_literal_section (".lit8",
- &alpha_lit8_section,
- &alpha_lit8_symbol);
- }
-
- lit = add_to_literal_pool (NULL, addend, alpha_lit8_section, 8) - 0x8000;
- if (lit >= 0x8000)
- as_fatal ("overflow in literal (.lit8) table");
-
- /* emit "ldq litreg, .lit8+lit" */
-
- 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");
-
- set_tok_reg (newtok[0], AXP_REG_AT);
- }
- else
- set_tok_reg (newtok[0], targreg);
- set_tok_sym (newtok[1], alpha_lit8_symbol, lit);
-
- assemble_tokens ("ldq", newtok, 2, 1); /* note this does recurse */
-
- /* emit "addq litreg, base, target" */
-
- if (basereg != AXP_REG_ZERO)
- {
- set_tok_reg (newtok[1], basereg);
- set_tok_reg (newtok[2], targreg);
- assemble_tokens ("addq", newtok, 3, 0);
- }
-
- if (poffset)
- set_tok_const (*poffset, 0);
- *pbasereg = targreg;
- }
- else
- {
- offsetT low, high, extra, tmp;
-
- /* for 32-bit operands, break up the addend */
-
- low = sign_extend_16 (addend);
- tmp = addend - low;
- high = sign_extend_16 (tmp >> 16);
-
- if (tmp - (high << 16))
- {
- extra = 0x4000;
- tmp -= 0x40000000;
- high = sign_extend_16 (tmp >> 16);
- }
- else
- extra = 0;
-
- set_tok_reg (newtok[0], targreg);
- set_tok_preg (newtok[2], basereg);
-
- 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);
- }
-
- 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);
- }
-
- 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;
- }
-
- 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)
- {
- memmove (&insn.fixups[1], &insn.fixups[0],
- sizeof(struct alpha_fixup) * insn.nfixups);
- }
- 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;
- }
-
- 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)
- {
- assert (insn.nfixups < MAX_INSN_FIXUPS);
- if (insn.nfixups > 0)
- {
- memmove (&insn.fixups[1], &insn.fixups[0],
- sizeof(struct alpha_fixup) * insn.nfixups);
- }
- 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;
- }
-
- emit_insn (&insn);
- }
-
- static void
- emit_ldXu (tok, ntok, vlgsize)
- const expressionS *tok;
- int ntok;
- void *vlgsize;
- {
- expressionS newtok[3];
-
- if (alpha_noat_on)
- as_bad ("macro requires $at register while noat in effect");
-
- /* emit "lda $at, exp" */
-
- memcpy (newtok, tok, sizeof(expressionS)*ntok);
- newtok[0].X_add_number = AXP_REG_AT;
- assemble_tokens ("lda", newtok, ntok, 1);
-
- /* emit "ldq_u targ, 0($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;
- {
- emit_ldXu (tok, ntok, vlgsize);
- assemble_tokens (sextX_op[(long)vlgsize], tok, 1, 1);
- }
-
- 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)
- {
- /* They are in exactly the wrong order -- swap through AT */
-
- if (alpha_noat_on)
- as_bad ("macro requires $at register while noat in effect");
-
- set_tok_reg (newtok[0], AXP_REG_T10);
- set_tok_reg (newtok[1], AXP_REG_AT);
- assemble_tokens ("mov", newtok, 2, 1);
-
- set_tok_reg (newtok[0], AXP_REG_T11);
- set_tok_reg (newtok[1], AXP_REG_T10);
- assemble_tokens ("mov", newtok, 2, 1);
-
- 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);
- }
-
- 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);
- }
- }
-
- /* 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)
- {
- set_tok_reg (newtok[0], AXP_REG_T12);
- set_tok_reg (newtok[1], rr);
- assemble_tokens ("mov", newtok, 2, 1);
- }
- }
-
- static void
- emit_jsrjmp (tok, ntok, vopname)
- const expressionS *tok;
- int ntok;
- void *vopname;
- {
- 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
- {
- int basereg = alpha_gp_register;
- lituse = load_expression (r = AXP_REG_PV, &tok[tokidx], &basereg, NULL);
- }
-
- 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)
- {
- memmove (&insn.fixups[1], &insn.fixups[0],
- sizeof(struct alpha_fixup) * insn.nfixups);
- }
- 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);
- }
-
- /* 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;
-
- {
- 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 == ',')
- {
- 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;
- }
-
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
-
- 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:
- 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
-
- 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);
- }
-
- /*
- * 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;
- {
- 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);
- }
-
- static void
- s_alpha_proc (is_static)
- int is_static;
- {
- /* XXXX Align to cache linesize XXXXX */
- char *name;
- char c;
- char *p;
- symbolS *symbolP;
- int temp;
-
- /* Takes ".proc name,nargs" */
- name = input_line_pointer;
- c = get_symbol_end ();
- p = input_line_pointer;
- symbolP = symbol_find_or_make (name);
- *p = c;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- *p = 0;
- as_warn ("Expected comma after name \"%s\"", name);
- *p = c;
- temp = 0;
- ignore_rest_of_line ();
- }
- else
- {
- input_line_pointer++;
- temp = get_absolute_expression ();
- }
- /* symbolP->sy_other = (signed char) temp; */
- as_warn ("unhandled: .proc %s,%d", name, temp);
- demand_empty_rest_of_line ();
- }
-
- static void
- s_alpha_set (x)
- int x;
- {
- char *name = input_line_pointer, ch, *s;
- int yesno = 1;
-
- while (!is_end_of_line[(unsigned char) *input_line_pointer])
- input_line_pointer++;
- ch = *input_line_pointer;
- *input_line_pointer = '\0';
-
- s = name;
- if (s[0] == 'n' && s[1] == 'o')
- {
- yesno = 0;
- s += 2;
- }
- if (!strcmp ("reorder", s))
- /* ignore */ ;
- else if (!strcmp ("at", s))
- alpha_noat_on = !yesno;
- else if (!strcmp ("macro", s))
- 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 ();
- }
-
- static void
- s_alpha_base (ignore)
- int ignore;
- {
- #if 0
- if (first_32bit_quadrant)
- {
- /* 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.
- */
-
- static void
- s_alpha_align (ignore)
- int ignore;
- {
- int align;
- char fill, *pfill;
- long max_alignment = 15;
-
- align = get_absolute_expression ();
- if (align > max_alignment)
- {
- 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++;
- fill = get_absolute_expression ();
- pfill = &fill;
- }
- else
- pfill = NULL;
-
- if (align != 0)
- {
- alpha_auto_align_on = 1;
- alpha_align (align, pfill, alpha_insn_label);
- }
- else
- {
- alpha_auto_align_on = 0;
- }
-
- demand_empty_rest_of_line ();
- }
-
- /*
- * 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 (alpha_auto_align_on && log_size > 0)
- alpha_align (log_size, (char *) NULL, alpha_insn_label);
- alpha_insn_label = NULL;
- cons (1 << log_size);
- }
-
-
- /* 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
-
- { "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[] =
- {
- {"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'},
-
- {"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},
-
- {"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'},
-
- /* We don't do any optimizing, so we can safely ignore these. */
- {"noalias", s_ignore, 0},
- {"alias", s_ignore, 0},
-
- {NULL, 0, 0},
- };
-
-
-
- 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));
- }
-
- #ifndef OBJ_ELF
-
- static inline void
- maybe_set_gp (sec)
- asection *sec;
- {
- bfd_vma vma;
- if (!sec)
- return;
- vma = bfd_get_section_vma (foo, sec);
- if (vma && vma < alpha_gp_value)
- alpha_gp_value = vma;
- }
-
- static void
- select_gp_value ()
- {
- assert (alpha_gp_value == 0);
-
- /* Get minus-one in whatever width... */
- alpha_gp_value = 0; alpha_gp_value--;
-
- /* 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
-
- /* @@ Will a simple 0x8000 work here? If not, why not? */
- #define GP_ADJUSTMENT (0x8000 - 0x10)
-
- alpha_gp_value += GP_ADJUSTMENT;
-
- S_SET_VALUE (alpha_gp_symbol, alpha_gp_value);
-
- #ifdef DEBUG1
- printf ("Chose GP value of %lx\n", alpha_gp_value);
- #endif
- }
- #endif /* !OBJ_ELF */
-
- 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)
- {
- 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);
- }
- else
- frag_align (n, 0);
- }
- else
- frag_align (n, *pfill);
-
- if (label != NULL)
- {
- assert (S_GET_SEGMENT (label) == now_seg);
- label->sy_frag = frag_now;
- S_SET_VALUE (label, (valueT) frag_now_fix ());
- }
-
- record_alignment(now_seg, n);
- }
-
- /* The Alpha has support for some VAX floating point types, as well as for
- IEEE floating point. We consider IEEE to be the primary floating point
- format, and sneak in the VAX floating point support here. */
- #define md_atof vax_md_atof
- #include "config/atof-vax.c"
-