| /* Disassemble SPU instructions |
| |
| Copyright 2006 Free Software Foundation, Inc. |
| |
| This file is part of GDB, GAS, and the GNU binutils. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License along |
| with this program; if not, write to the Free Software Foundation, Inc., |
| 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| |
| #include <linux/string.h> |
| #include "nonstdio.h" |
| #include "ansidecl.h" |
| #include "spu.h" |
| #include "dis-asm.h" |
| |
| /* This file provides a disassembler function which uses |
| the disassembler interface defined in dis-asm.h. */ |
| |
| extern const struct spu_opcode spu_opcodes[]; |
| extern const int spu_num_opcodes; |
| |
| #define SPU_DISASM_TBL_SIZE (1 << 11) |
| static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE]; |
| |
| static void |
| init_spu_disassemble (void) |
| { |
| int i; |
| |
| /* If two instructions have the same opcode then we prefer the first |
| * one. In most cases it is just an alternate mnemonic. */ |
| for (i = 0; i < spu_num_opcodes; i++) |
| { |
| int o = spu_opcodes[i].opcode; |
| if (o >= SPU_DISASM_TBL_SIZE) |
| continue; /* abort (); */ |
| if (spu_disassemble_table[o] == 0) |
| spu_disassemble_table[o] = &spu_opcodes[i]; |
| } |
| } |
| |
| /* Determine the instruction from the 10 least significant bits. */ |
| static const struct spu_opcode * |
| get_index_for_opcode (unsigned int insn) |
| { |
| const struct spu_opcode *index; |
| unsigned int opcode = insn >> (32-11); |
| |
| /* Init the table. This assumes that element 0/opcode 0 (currently |
| * NOP) is always used */ |
| if (spu_disassemble_table[0] == 0) |
| init_spu_disassemble (); |
| |
| if ((index = spu_disassemble_table[opcode & 0x780]) != 0 |
| && index->insn_type == RRR) |
| return index; |
| |
| if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0 |
| && (index->insn_type == RI18 || index->insn_type == LBT)) |
| return index; |
| |
| if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0 |
| && index->insn_type == RI10) |
| return index; |
| |
| if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0 |
| && (index->insn_type == RI16)) |
| return index; |
| |
| if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0 |
| && (index->insn_type == RI8)) |
| return index; |
| |
| if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0) |
| return index; |
| |
| return NULL; |
| } |
| |
| /* Print a Spu instruction. */ |
| |
| int |
| print_insn_spu (unsigned long insn, unsigned long memaddr) |
| { |
| int value; |
| int hex_value; |
| const struct spu_opcode *index; |
| enum spu_insns tag; |
| |
| index = get_index_for_opcode (insn); |
| |
| if (index == 0) |
| { |
| printf(".long 0x%lx", insn); |
| } |
| else |
| { |
| int i; |
| int paren = 0; |
| tag = (enum spu_insns)(index - spu_opcodes); |
| printf("%s", index->mnemonic); |
| if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED |
| || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ |
| || tag == M_SYNC || tag == M_HBR) |
| { |
| int fb = (insn >> (32-18)) & 0x7f; |
| if (fb & 0x40) |
| printf(tag == M_SYNC ? "c" : "p"); |
| if (fb & 0x20) |
| printf("d"); |
| if (fb & 0x10) |
| printf("e"); |
| } |
| if (index->arg[0] != 0) |
| printf("\t"); |
| hex_value = 0; |
| for (i = 1; i <= index->arg[0]; i++) |
| { |
| int arg = index->arg[i]; |
| if (arg != A_P && !paren && i > 1) |
| printf(","); |
| |
| switch (arg) |
| { |
| case A_T: |
| printf("$%lu", |
| DECODE_INSN_RT (insn)); |
| break; |
| case A_A: |
| printf("$%lu", |
| DECODE_INSN_RA (insn)); |
| break; |
| case A_B: |
| printf("$%lu", |
| DECODE_INSN_RB (insn)); |
| break; |
| case A_C: |
| printf("$%lu", |
| DECODE_INSN_RC (insn)); |
| break; |
| case A_S: |
| printf("$sp%lu", |
| DECODE_INSN_RA (insn)); |
| break; |
| case A_H: |
| printf("$ch%lu", |
| DECODE_INSN_RA (insn)); |
| break; |
| case A_P: |
| paren++; |
| printf("("); |
| break; |
| case A_U7A: |
| printf("%lu", |
| 173 - DECODE_INSN_U8 (insn)); |
| break; |
| case A_U7B: |
| printf("%lu", |
| 155 - DECODE_INSN_U8 (insn)); |
| break; |
| case A_S3: |
| case A_S6: |
| case A_S7: |
| case A_S7N: |
| case A_U3: |
| case A_U5: |
| case A_U6: |
| case A_U7: |
| hex_value = DECODE_INSN_I7 (insn); |
| printf("%d", hex_value); |
| break; |
| case A_S11: |
| print_address(memaddr + DECODE_INSN_I9a (insn) * 4); |
| break; |
| case A_S11I: |
| print_address(memaddr + DECODE_INSN_I9b (insn) * 4); |
| break; |
| case A_S10: |
| case A_S10B: |
| hex_value = DECODE_INSN_I10 (insn); |
| printf("%d", hex_value); |
| break; |
| case A_S14: |
| hex_value = DECODE_INSN_I10 (insn) * 16; |
| printf("%d", hex_value); |
| break; |
| case A_S16: |
| hex_value = DECODE_INSN_I16 (insn); |
| printf("%d", hex_value); |
| break; |
| case A_X16: |
| hex_value = DECODE_INSN_U16 (insn); |
| printf("%u", hex_value); |
| break; |
| case A_R18: |
| value = DECODE_INSN_I16 (insn) * 4; |
| if (value == 0) |
| printf("%d", value); |
| else |
| { |
| hex_value = memaddr + value; |
| print_address(hex_value & 0x3ffff); |
| } |
| break; |
| case A_S18: |
| value = DECODE_INSN_U16 (insn) * 4; |
| if (value == 0) |
| printf("%d", value); |
| else |
| print_address(value); |
| break; |
| case A_U18: |
| value = DECODE_INSN_U18 (insn); |
| if (value == 0 || 1) |
| { |
| hex_value = value; |
| printf("%u", value); |
| } |
| else |
| print_address(value); |
| break; |
| case A_U14: |
| hex_value = DECODE_INSN_U14 (insn); |
| printf("%u", hex_value); |
| break; |
| } |
| if (arg != A_P && paren) |
| { |
| printf(")"); |
| paren--; |
| } |
| } |
| if (hex_value > 16) |
| printf("\t# %x", hex_value); |
| } |
| return 4; |
| } |