1 /* Generic opcode table support for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
6 Copyright (C) 1998 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"
33 /* The hash functions are recorded here to help keep assembler code out of
34 the disassembler and vice versa. */
36 static int asm_hash_insn_p PARAMS ((const CGEN_INSN *));
37 static unsigned int asm_hash_insn PARAMS ((const char *));
38 static int dis_hash_insn_p PARAMS ((const CGEN_INSN *));
39 static unsigned int dis_hash_insn PARAMS ((const char *, unsigned long));
41 /* Cover function to read and properly byteswap an insn value. */
44 cgen_get_insn_value (od, buf, length)
57 if (CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG)
58 value = bfd_getb16 (buf);
60 value = bfd_getl16 (buf);
63 if (CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG)
64 value = bfd_getb32 (buf);
66 value = bfd_getl32 (buf);
75 /* Cover function to store an insn value properly byteswapped. */
78 cgen_put_insn_value (od, buf, length, value)
90 if (CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG)
91 bfd_putb16 (value, buf);
93 bfd_putl16 (value, buf);
96 if (CGEN_OPCODE_INSN_ENDIAN (od) == CGEN_ENDIAN_BIG)
97 bfd_putb32 (value, buf);
99 bfd_putl32 (value, buf);
106 /* Look up instruction INSN_VALUE and extract its fields.
107 INSN, if non-null, is the insn table entry.
108 Otherwise INSN_VALUE is examined to compute it.
109 LENGTH is the bit length of INSN_VALUE if known, otherwise 0.
110 0 is only valid if `insn == NULL && ! CGEN_INT_INSN_P'.
111 If INSN != NULL, LENGTH must be valid.
112 ALIAS_P is non-zero if alias insns are to be included in the search.
114 The result a pointer to the insn table entry, or NULL if the instruction
115 wasn't recognized. */
118 @arch@_cgen_lookup_insn (od, insn, insn_value, length, fields, alias_p)
120 const CGEN_INSN *insn;
121 CGEN_INSN_BYTES insn_value;
126 unsigned char buf[16];
128 unsigned int base_insn;
130 CGEN_EXTRACT_INFO *info = NULL;
132 CGEN_EXTRACT_INFO ex_info;
133 CGEN_EXTRACT_INFO *info = &ex_info;
136 #if ! CGEN_INT_INSN_P
137 ex_info.dis_info = NULL;
138 ex_info.bytes = insn_value;
144 const CGEN_INSN_LIST *insn_list;
147 cgen_put_insn_value (od, buf, length, insn_value);
149 base_insn = insn_value; /*???*/
151 base_insn = cgen_get_insn_value (od, buf, length);
155 /* The instructions are stored in hash lists.
156 Pick the first one and keep trying until we find the right one. */
158 insn_list = CGEN_DIS_LOOKUP_INSN (od, bufp, base_insn);
159 while (insn_list != NULL)
161 insn = insn_list->insn;
164 || ! CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
166 /* Basic bit mask must be correct. */
167 /* ??? May wish to allow target to defer this check until the
169 if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
171 /* ??? 0 is passed for `pc' */
172 int elength = (*CGEN_EXTRACT_FN (insn)) (od, insn, info,
178 if (length != 0 && length != elength)
185 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
190 /* Sanity check: can't pass an alias insn if ! alias_p. */
192 && CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
194 /* Sanity check: length must be correct. */
195 if (length != CGEN_INSN_BITSIZE (insn))
198 /* ??? 0 is passed for `pc' */
199 length = (*CGEN_EXTRACT_FN (insn)) (od, insn, info, insn_value, fields,
201 /* Sanity check: must succeed.
202 Could relax this later if it ever proves useful. */
211 /* Fill in the operand instances used by INSN whose operands are FIELDS.
212 INDICES is a pointer to a buffer of MAX_OPERAND_INSTANCES ints to be filled
216 @arch@_cgen_get_insn_operands (od, insn, fields, indices)
218 const CGEN_INSN * insn;
219 const CGEN_FIELDS * fields;
222 const CGEN_OPERAND_INSTANCE *opinst;
225 for (i = 0, opinst = CGEN_INSN_OPERANDS (insn);
227 && CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
230 const CGEN_OPERAND *op = CGEN_OPERAND_INSTANCE_OPERAND (opinst);
232 indices[i] = CGEN_OPERAND_INSTANCE_INDEX (opinst);
234 indices[i] = @arch@_cgen_get_int_operand (CGEN_OPERAND_INDEX (op),
239 /* Cover function to @arch@_cgen_get_insn_operands when either INSN or FIELDS
241 The INSN, INSN_VALUE, and LENGTH arguments are passed to
242 @arch@_cgen_lookup_insn unchanged.
244 The result is the insn table entry or NULL if the instruction wasn't
248 @arch@_cgen_lookup_get_insn_operands (od, insn, insn_value, length, indices)
250 const CGEN_INSN *insn;
251 CGEN_INSN_BYTES insn_value;
257 /* Pass non-zero for ALIAS_P only if INSN != NULL.
258 If INSN == NULL, we want a real insn. */
259 insn = @arch@_cgen_lookup_insn (od, insn, insn_value, length, &fields,
264 @arch@_cgen_get_insn_operands (od, insn, &fields, indices);