1 /* Disassemble SPU instructions
3 Copyright 2006 Free Software Foundation, Inc.
5 This file is part of GDB, GAS, and the GNU binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
24 #include "opcode/spu.h"
26 /* This file provides a disassembler function which uses
27 the disassembler interface defined in dis-asm.h. */
29 extern const struct spu_opcode spu_opcodes[];
30 extern const int spu_num_opcodes;
32 static const struct spu_opcode *spu_disassemble_table[(1<<11)];
35 init_spu_disassemble (void)
39 /* If two instructions have the same opcode then we prefer the first
40 * one. In most cases it is just an alternate mnemonic. */
41 for (i = 0; i < spu_num_opcodes; i++)
43 int o = spu_opcodes[i].opcode;
46 if (spu_disassemble_table[o] == 0)
47 spu_disassemble_table[o] = &spu_opcodes[i];
51 /* Determine the instruction from the 10 least significant bits. */
52 static const struct spu_opcode *
53 get_index_for_opcode (unsigned int insn)
55 const struct spu_opcode *index;
56 unsigned int opcode = insn >> (32-11);
58 /* Init the table. This assumes that element 0/opcode 0 (currently
59 * NOP) is always used */
60 if (spu_disassemble_table[0] == 0)
61 init_spu_disassemble ();
63 if ((index = spu_disassemble_table[opcode & 0x780]) != 0
64 && index->insn_type == RRR)
67 if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
68 && (index->insn_type == RI18 || index->insn_type == LBT))
71 if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
72 && index->insn_type == RI10)
75 if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
76 && (index->insn_type == RI16))
79 if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
80 && (index->insn_type == RI8))
83 if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
89 /* Print a Spu instruction. */
92 print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
99 const struct spu_opcode *index;
102 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
105 (*info->memory_error_func) (status, memaddr, info);
109 insn = bfd_getb32 (buffer);
111 index = get_index_for_opcode (insn);
115 (*info->fprintf_func) (info->stream, ".long 0x%x", insn);
121 tag = (enum spu_insns)(index - spu_opcodes);
122 (*info->fprintf_func) (info->stream, "%s", index->mnemonic);
123 if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
124 || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
125 || tag == M_SYNC || tag == M_HBR)
127 int fb = (insn >> (32-18)) & 0x7f;
129 (*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p");
131 (*info->fprintf_func) (info->stream, "d");
133 (*info->fprintf_func) (info->stream, "e");
135 if (index->arg[0] != 0)
136 (*info->fprintf_func) (info->stream, "\t");
138 for (i = 1; i <= index->arg[0]; i++)
140 int arg = index->arg[i];
141 if (arg != A_P && !paren && i > 1)
142 (*info->fprintf_func) (info->stream, ",");
147 (*info->fprintf_func) (info->stream, "$%d",
148 DECODE_INSN_RT (insn));
151 (*info->fprintf_func) (info->stream, "$%d",
152 DECODE_INSN_RA (insn));
155 (*info->fprintf_func) (info->stream, "$%d",
156 DECODE_INSN_RB (insn));
159 (*info->fprintf_func) (info->stream, "$%d",
160 DECODE_INSN_RC (insn));
163 (*info->fprintf_func) (info->stream, "$sp%d",
164 DECODE_INSN_RA (insn));
167 (*info->fprintf_func) (info->stream, "$ch%d",
168 DECODE_INSN_RA (insn));
172 (*info->fprintf_func) (info->stream, "(");
175 (*info->fprintf_func) (info->stream, "%d",
176 173 - DECODE_INSN_U8 (insn));
179 (*info->fprintf_func) (info->stream, "%d",
180 155 - DECODE_INSN_U8 (insn));
190 hex_value = DECODE_INSN_I7 (insn);
191 (*info->fprintf_func) (info->stream, "%d", hex_value);
194 (*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4,
198 (*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4,
203 hex_value = DECODE_INSN_I10 (insn);
204 (*info->fprintf_func) (info->stream, "%d", hex_value);
207 hex_value = DECODE_INSN_I10 (insn) * 16;
208 (*info->fprintf_func) (info->stream, "%d", hex_value);
211 hex_value = DECODE_INSN_I16 (insn);
212 (*info->fprintf_func) (info->stream, "%d", hex_value);
215 hex_value = DECODE_INSN_U16 (insn);
216 (*info->fprintf_func) (info->stream, "%u", hex_value);
219 value = DECODE_INSN_I16 (insn) * 4;
221 (*info->fprintf_func) (info->stream, "%d", value);
224 hex_value = memaddr + value;
225 (*info->print_address_func) (hex_value & 0x3ffff, info);
229 value = DECODE_INSN_U16 (insn) * 4;
231 (*info->fprintf_func) (info->stream, "%d", value);
233 (*info->print_address_func) (value, info);
236 value = DECODE_INSN_U18 (insn);
237 if (value == 0 || !(*info->symbol_at_address_func)(0, info))
240 (*info->fprintf_func) (info->stream, "%u", value);
243 (*info->print_address_func) (value, info);
246 hex_value = DECODE_INSN_U14 (insn);
247 (*info->fprintf_func) (info->stream, "%u", hex_value);
250 if (arg != A_P && paren)
252 (*info->fprintf_func) (info->stream, ")");
257 (*info->fprintf_func) (info->stream, "\t# %x", hex_value);