1 /* Generic opcode table support for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 THIS FILE IS USED TO GENERATE @prefix@-opc.c.
6 Copyright (C) 1998, 1999 Free Software Foundation, Inc.
8 This file is part of the GNU Binutils and GDB, the GNU debugger.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software Foundation, Inc.,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "libiberty.h"
30 #include "@prefix@-opc.h"
33 /* Used by the ifield rtx function. */
34 #define FLD(f) (fields->f)
36 /* The hash functions are recorded here to help keep assembler code out of
37 the disassembler and vice versa. */
39 static int asm_hash_insn_p PARAMS ((const CGEN_INSN *));
40 static unsigned int asm_hash_insn PARAMS ((const char *));
41 static int dis_hash_insn_p PARAMS ((const CGEN_INSN *));
42 static unsigned int dis_hash_insn PARAMS ((const char *, CGEN_INSN_INT));
44 /* Look up instruction INSN_VALUE and extract its fields.
45 INSN, if non-null, is the insn table entry.
46 Otherwise INSN_VALUE is examined to compute it.
47 LENGTH is the bit length of INSN_VALUE if known, otherwise 0.
48 0 is only valid if `insn == NULL && ! CGEN_INT_INSN_P'.
49 If INSN != NULL, LENGTH must be valid.
50 ALIAS_P is non-zero if alias insns are to be included in the search.
52 The result is a pointer to the insn table entry, or NULL if the instruction
56 @arch@_cgen_lookup_insn (od, insn, insn_value, length, fields, alias_p)
58 const CGEN_INSN *insn;
59 CGEN_INSN_BYTES insn_value;
64 unsigned char buf[CGEN_MAX_INSN_SIZE];
66 CGEN_INSN_INT base_insn;
68 CGEN_EXTRACT_INFO *info = NULL;
70 CGEN_EXTRACT_INFO ex_info;
71 CGEN_EXTRACT_INFO *info = &ex_info;
75 cgen_put_insn_value (od, buf, length, insn_value);
77 base_insn = insn_value; /*???*/
79 ex_info.dis_info = NULL;
80 ex_info.insn_bytes = insn_value;
82 base_insn = cgen_get_insn_value (od, buf, length);
88 const CGEN_INSN_LIST *insn_list;
90 /* The instructions are stored in hash lists.
91 Pick the first one and keep trying until we find the right one. */
93 insn_list = CGEN_DIS_LOOKUP_INSN (od, bufp, base_insn);
94 while (insn_list != NULL)
96 insn = insn_list->insn;
99 || ! CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
101 /* Basic bit mask must be correct. */
102 /* ??? May wish to allow target to defer this check until the
104 if ((base_insn & CGEN_INSN_BASE_MASK (insn))
105 == CGEN_INSN_BASE_VALUE (insn))
107 /* ??? 0 is passed for `pc' */
108 int elength = (*CGEN_EXTRACT_FN (insn)) (od, insn, info,
114 if (length != 0 && length != elength)
121 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
126 /* Sanity check: can't pass an alias insn if ! alias_p. */
128 && CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
130 /* Sanity check: length must be correct. */
131 if (length != CGEN_INSN_BITSIZE (insn))
134 /* ??? 0 is passed for `pc' */
135 length = (*CGEN_EXTRACT_FN (insn)) (od, insn, info, base_insn, fields,
137 /* Sanity check: must succeed.
138 Could relax this later if it ever proves useful. */
147 /* Fill in the operand instances used by INSN whose operands are FIELDS.
148 INDICES is a pointer to a buffer of MAX_OPERAND_INSTANCES ints to be filled
152 @arch@_cgen_get_insn_operands (od, insn, fields, indices)
154 const CGEN_INSN * insn;
155 const CGEN_FIELDS * fields;
158 const CGEN_OPERAND_INSTANCE *opinst;
161 for (i = 0, opinst = CGEN_INSN_OPERANDS (insn);
163 && CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
166 const CGEN_OPERAND *op = CGEN_OPERAND_INSTANCE_OPERAND (opinst);
168 indices[i] = CGEN_OPERAND_INSTANCE_INDEX (opinst);
170 indices[i] = @arch@_cgen_get_int_operand (CGEN_OPERAND_INDEX (op),
175 /* Cover function to @arch@_cgen_get_insn_operands when either INSN or FIELDS
177 The INSN, INSN_VALUE, and LENGTH arguments are passed to
178 @arch@_cgen_lookup_insn unchanged.
180 The result is the insn table entry or NULL if the instruction wasn't
184 @arch@_cgen_lookup_get_insn_operands (od, insn, insn_value, length, indices)
186 const CGEN_INSN *insn;
187 CGEN_INSN_BYTES insn_value;
193 /* Pass non-zero for ALIAS_P only if INSN != NULL.
194 If INSN == NULL, we want a real insn. */
195 insn = @arch@_cgen_lookup_insn (od, insn, insn_value, length, &fields,
200 @arch@_cgen_get_insn_operands (od, insn, &fields, indices);