1 /* Generic opcode table support for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 This file is used to generate @arch@-opc.c.
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
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
27 #include "libiberty.h"
30 #include "@arch@-opc.h"
32 /* Look up instruction INSN_VALUE and extract its fields.
33 If non-null INSN is the insn table entry.
34 Otherwise INSN_VALUE is examined to compute it.
35 LENGTH is the bit length of INSN_VALUE if known, otherwise 0.
36 ALIAS_P is non-zero if alias insns are to be included in the search.
37 The result a pointer to the insn table entry, or NULL if the instruction
41 @arch@_cgen_lookup_insn (insn, insn_value, length, fields, alias_p)
42 const CGEN_INSN *insn;
43 cgen_insn_t insn_value;
51 const CGEN_INSN_LIST *insn_list;
60 if (cgen_current_endian == CGEN_ENDIAN_BIG)
61 bfd_putb16 (insn_value, buf);
63 bfd_putl16 (insn_value, buf);
66 if (cgen_current_endian == CGEN_ENDIAN_BIG)
67 bfd_putb32 (insn_value, buf);
69 bfd_putl32 (insn_value, buf);
75 abort (); /* FIXME: unfinished */
78 /* The instructions are stored in hash lists.
79 Pick the first one and keep trying until we find the right one. */
81 insn_list = CGEN_DIS_LOOKUP_INSN (buf, insn_value);
82 while (insn_list != NULL)
84 insn = insn_list->insn;
87 || ! CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
89 /* Basic bit mask must be correct. */
90 /* ??? May wish to allow target to defer this check until the
92 if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
94 length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, fields);
100 insn_list = CGEN_DIS_NEXT_INSN (insn_list);
105 /* Sanity check: can't pass an alias insn if ! alias_p. */
107 && CGEN_INSN_ATTR (insn, CGEN_INSN_ALIAS))
110 length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, fields);
118 /* Fill in the operand instances used by insn INSN_VALUE.
119 If non-null INS is the insn table entry.
120 Otherwise INSN_VALUE is examined to compute it.
121 LENGTH is the number of bits in INSN_VALUE if known, otherwise 0.
122 INDICES is a pointer to a buffer of MAX_OPERAND_INSTANCES ints to be filled
124 The result a pointer to the insn table entry, or NULL if the instruction
125 wasn't recognized. */
128 @arch@_cgen_get_insn_operands (insn, insn_value, length, indices)
129 const CGEN_INSN *insn;
130 cgen_insn_t insn_value;
135 const CGEN_OPERAND_INSTANCE *opinst;
138 /* FIXME: ALIAS insns are in transition from being record in the insn table
139 to being recorded separately as macros. They don't have semantic code
140 so they can't be used here. Thus we currently always ignore the INSN
142 insn = @arch@_cgen_lookup_insn (NULL, insn_value, length, &fields, 0);
146 for (i = 0, opinst = CGEN_INSN_OPERANDS (insn);
148 && CGEN_OPERAND_INSTANCE_TYPE (opinst) != CGEN_OPERAND_INSTANCE_END;
151 const CGEN_OPERAND *op = CGEN_OPERAND_INSTANCE_OPERAND (opinst);
153 indices[i] = CGEN_OPERAND_INSTANCE_INDEX (opinst);
155 indices[i] = @arch@_cgen_get_operand (CGEN_OPERAND_INDEX (op), &fields);