| 1 | /* Disassemble SPU instructions |
| 2 | |
| 3 | Copyright 2006, 2007 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of the GNU opcodes library. |
| 6 | |
| 7 | This library 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 3, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | It is distributed in the hope that it will be useful, but WITHOUT |
| 13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| 14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| 15 | License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this file; see the file COPYING. If not, write to the |
| 19 | Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
| 20 | MA 02110-1301, USA. */ |
| 21 | |
| 22 | #include <stdio.h> |
| 23 | #include "sysdep.h" |
| 24 | #include "dis-asm.h" |
| 25 | #include "opcode/spu.h" |
| 26 | |
| 27 | /* This file provides a disassembler function which uses |
| 28 | the disassembler interface defined in dis-asm.h. */ |
| 29 | |
| 30 | extern const struct spu_opcode spu_opcodes[]; |
| 31 | extern const int spu_num_opcodes; |
| 32 | |
| 33 | static const struct spu_opcode *spu_disassemble_table[(1<<11)]; |
| 34 | |
| 35 | static void |
| 36 | init_spu_disassemble (void) |
| 37 | { |
| 38 | int i; |
| 39 | |
| 40 | /* If two instructions have the same opcode then we prefer the first |
| 41 | * one. In most cases it is just an alternate mnemonic. */ |
| 42 | for (i = 0; i < spu_num_opcodes; i++) |
| 43 | { |
| 44 | int o = spu_opcodes[i].opcode; |
| 45 | if (o >= (1 << 11)) |
| 46 | abort (); |
| 47 | if (spu_disassemble_table[o] == 0) |
| 48 | spu_disassemble_table[o] = &spu_opcodes[i]; |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | /* Determine the instruction from the 10 least significant bits. */ |
| 53 | static const struct spu_opcode * |
| 54 | get_index_for_opcode (unsigned int insn) |
| 55 | { |
| 56 | const struct spu_opcode *index; |
| 57 | unsigned int opcode = insn >> (32-11); |
| 58 | |
| 59 | /* Init the table. This assumes that element 0/opcode 0 (currently |
| 60 | * NOP) is always used */ |
| 61 | if (spu_disassemble_table[0] == 0) |
| 62 | init_spu_disassemble (); |
| 63 | |
| 64 | if ((index = spu_disassemble_table[opcode & 0x780]) != 0 |
| 65 | && index->insn_type == RRR) |
| 66 | return index; |
| 67 | |
| 68 | if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0 |
| 69 | && (index->insn_type == RI18 || index->insn_type == LBT)) |
| 70 | return index; |
| 71 | |
| 72 | if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0 |
| 73 | && index->insn_type == RI10) |
| 74 | return index; |
| 75 | |
| 76 | if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0 |
| 77 | && (index->insn_type == RI16)) |
| 78 | return index; |
| 79 | |
| 80 | if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0 |
| 81 | && (index->insn_type == RI8)) |
| 82 | return index; |
| 83 | |
| 84 | if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0) |
| 85 | return index; |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | /* Print a Spu instruction. */ |
| 91 | |
| 92 | int |
| 93 | print_insn_spu (bfd_vma memaddr, struct disassemble_info *info) |
| 94 | { |
| 95 | bfd_byte buffer[4]; |
| 96 | int value; |
| 97 | int hex_value; |
| 98 | int status; |
| 99 | unsigned int insn; |
| 100 | const struct spu_opcode *index; |
| 101 | enum spu_insns tag; |
| 102 | |
| 103 | status = (*info->read_memory_func) (memaddr, buffer, 4, info); |
| 104 | if (status != 0) |
| 105 | { |
| 106 | (*info->memory_error_func) (status, memaddr, info); |
| 107 | return -1; |
| 108 | } |
| 109 | |
| 110 | insn = bfd_getb32 (buffer); |
| 111 | |
| 112 | index = get_index_for_opcode (insn); |
| 113 | |
| 114 | if (index == 0) |
| 115 | { |
| 116 | (*info->fprintf_func) (info->stream, ".long 0x%x", insn); |
| 117 | } |
| 118 | else |
| 119 | { |
| 120 | int i; |
| 121 | int paren = 0; |
| 122 | tag = (enum spu_insns)(index - spu_opcodes); |
| 123 | (*info->fprintf_func) (info->stream, "%s", index->mnemonic); |
| 124 | if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED |
| 125 | || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ |
| 126 | || tag == M_SYNC || tag == M_HBR) |
| 127 | { |
| 128 | int fb = (insn >> (32-18)) & 0x7f; |
| 129 | if (fb & 0x40) |
| 130 | (*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p"); |
| 131 | if (fb & 0x20) |
| 132 | (*info->fprintf_func) (info->stream, "d"); |
| 133 | if (fb & 0x10) |
| 134 | (*info->fprintf_func) (info->stream, "e"); |
| 135 | } |
| 136 | if (index->arg[0] != 0) |
| 137 | (*info->fprintf_func) (info->stream, "\t"); |
| 138 | hex_value = 0; |
| 139 | for (i = 1; i <= index->arg[0]; i++) |
| 140 | { |
| 141 | int arg = index->arg[i]; |
| 142 | if (arg != A_P && !paren && i > 1) |
| 143 | (*info->fprintf_func) (info->stream, ","); |
| 144 | |
| 145 | switch (arg) |
| 146 | { |
| 147 | case A_T: |
| 148 | (*info->fprintf_func) (info->stream, "$%d", |
| 149 | DECODE_INSN_RT (insn)); |
| 150 | break; |
| 151 | case A_A: |
| 152 | (*info->fprintf_func) (info->stream, "$%d", |
| 153 | DECODE_INSN_RA (insn)); |
| 154 | break; |
| 155 | case A_B: |
| 156 | (*info->fprintf_func) (info->stream, "$%d", |
| 157 | DECODE_INSN_RB (insn)); |
| 158 | break; |
| 159 | case A_C: |
| 160 | (*info->fprintf_func) (info->stream, "$%d", |
| 161 | DECODE_INSN_RC (insn)); |
| 162 | break; |
| 163 | case A_S: |
| 164 | (*info->fprintf_func) (info->stream, "$sp%d", |
| 165 | DECODE_INSN_RA (insn)); |
| 166 | break; |
| 167 | case A_H: |
| 168 | (*info->fprintf_func) (info->stream, "$ch%d", |
| 169 | DECODE_INSN_RA (insn)); |
| 170 | break; |
| 171 | case A_P: |
| 172 | paren++; |
| 173 | (*info->fprintf_func) (info->stream, "("); |
| 174 | break; |
| 175 | case A_U7A: |
| 176 | (*info->fprintf_func) (info->stream, "%d", |
| 177 | 173 - DECODE_INSN_U8 (insn)); |
| 178 | break; |
| 179 | case A_U7B: |
| 180 | (*info->fprintf_func) (info->stream, "%d", |
| 181 | 155 - DECODE_INSN_U8 (insn)); |
| 182 | break; |
| 183 | case A_S3: |
| 184 | case A_S6: |
| 185 | case A_S7: |
| 186 | case A_S7N: |
| 187 | case A_U3: |
| 188 | case A_U5: |
| 189 | case A_U6: |
| 190 | case A_U7: |
| 191 | hex_value = DECODE_INSN_I7 (insn); |
| 192 | (*info->fprintf_func) (info->stream, "%d", hex_value); |
| 193 | break; |
| 194 | case A_S11: |
| 195 | (*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4, |
| 196 | info); |
| 197 | break; |
| 198 | case A_S11I: |
| 199 | (*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4, |
| 200 | info); |
| 201 | break; |
| 202 | case A_S10: |
| 203 | case A_S10B: |
| 204 | hex_value = DECODE_INSN_I10 (insn); |
| 205 | (*info->fprintf_func) (info->stream, "%d", hex_value); |
| 206 | break; |
| 207 | case A_S14: |
| 208 | hex_value = DECODE_INSN_I10 (insn) * 16; |
| 209 | (*info->fprintf_func) (info->stream, "%d", hex_value); |
| 210 | break; |
| 211 | case A_S16: |
| 212 | hex_value = DECODE_INSN_I16 (insn); |
| 213 | (*info->fprintf_func) (info->stream, "%d", hex_value); |
| 214 | break; |
| 215 | case A_X16: |
| 216 | hex_value = DECODE_INSN_U16 (insn); |
| 217 | (*info->fprintf_func) (info->stream, "%u", hex_value); |
| 218 | break; |
| 219 | case A_R18: |
| 220 | value = DECODE_INSN_I16 (insn) * 4; |
| 221 | if (value == 0) |
| 222 | (*info->fprintf_func) (info->stream, "%d", value); |
| 223 | else |
| 224 | { |
| 225 | hex_value = memaddr + value; |
| 226 | (*info->print_address_func) (hex_value & 0x3ffff, info); |
| 227 | } |
| 228 | break; |
| 229 | case A_S18: |
| 230 | value = DECODE_INSN_U16 (insn) * 4; |
| 231 | if (value == 0) |
| 232 | (*info->fprintf_func) (info->stream, "%d", value); |
| 233 | else |
| 234 | (*info->print_address_func) (value, info); |
| 235 | break; |
| 236 | case A_U18: |
| 237 | value = DECODE_INSN_U18 (insn); |
| 238 | if (value == 0 || !(*info->symbol_at_address_func)(0, info)) |
| 239 | { |
| 240 | hex_value = value; |
| 241 | (*info->fprintf_func) (info->stream, "%u", value); |
| 242 | } |
| 243 | else |
| 244 | (*info->print_address_func) (value, info); |
| 245 | break; |
| 246 | case A_U14: |
| 247 | hex_value = DECODE_INSN_U14 (insn); |
| 248 | (*info->fprintf_func) (info->stream, "%u", hex_value); |
| 249 | break; |
| 250 | } |
| 251 | if (arg != A_P && paren) |
| 252 | { |
| 253 | (*info->fprintf_func) (info->stream, ")"); |
| 254 | paren--; |
| 255 | } |
| 256 | } |
| 257 | if (hex_value > 16) |
| 258 | (*info->fprintf_func) (info->stream, "\t# %x", hex_value); |
| 259 | } |
| 260 | return 4; |
| 261 | } |