/* Disassemble SPU instructions Copyright 2006, 2007 Free Software Foundation, Inc. This file is part of the GNU opcodes library. This library 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 3, or (at your option) any later version. It 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 file; see the file COPYING. If not, write to the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include <stdio.h> #include "sysdep.h" #include "dis-asm.h" #include "opcode/spu.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; static const struct spu_opcode *spu_disassemble_table[(1<<11)]; 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 >= (1 << 11)) 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 *op_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 ((op_index = spu_disassemble_table[opcode & 0x780]) != 0 && op_index->insn_type == RRR) return op_index; if ((op_index = spu_disassemble_table[opcode & 0x7f0]) != 0 && (op_index->insn_type == RI18 || op_index->insn_type == LBT)) return op_index; if ((op_index = spu_disassemble_table[opcode & 0x7f8]) != 0 && op_index->insn_type == RI10) return op_index; if ((op_index = spu_disassemble_table[opcode & 0x7fc]) != 0 && (op_index->insn_type == RI16)) return op_index; if ((op_index = spu_disassemble_table[opcode & 0x7fe]) != 0 && (op_index->insn_type == RI8)) return op_index; if ((op_index = spu_disassemble_table[opcode & 0x7ff]) != 0) return op_index; return 0; } /* Print a Spu instruction. */ int print_insn_spu (bfd_vma memaddr, struct disassemble_info *info) { bfd_byte buffer[4]; int value; int hex_value; int status; unsigned int insn; const struct spu_opcode *op_index; enum spu_insns tag; status = (*info->read_memory_func) (memaddr, buffer, 4, info); if (status != 0) { (*info->memory_error_func) (status, memaddr, info); return -1; } insn = bfd_getb32 (buffer); op_index = get_index_for_opcode (insn); if (op_index == 0) { (*info->fprintf_func) (info->stream, ".long 0x%x", insn); } else { int i; int paren = 0; tag = (enum spu_insns)(op_index - spu_opcodes); (*info->fprintf_func) (info->stream, "%s", op_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) (*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p"); if (fb & 0x20) (*info->fprintf_func) (info->stream, "d"); if (fb & 0x10) (*info->fprintf_func) (info->stream, "e"); } if (op_index->arg[0] != 0) (*info->fprintf_func) (info->stream, "\t"); hex_value = 0; for (i = 1; i <= op_index->arg[0]; i++) { int arg = op_index->arg[i]; if (arg != A_P && !paren && i > 1) (*info->fprintf_func) (info->stream, ","); switch (arg) { case A_T: (*info->fprintf_func) (info->stream, "$%d", DECODE_INSN_RT (insn)); break; case A_A: (*info->fprintf_func) (info->stream, "$%d", DECODE_INSN_RA (insn)); break; case A_B: (*info->fprintf_func) (info->stream, "$%d", DECODE_INSN_RB (insn)); break; case A_C: (*info->fprintf_func) (info->stream, "$%d", DECODE_INSN_RC (insn)); break; case A_S: (*info->fprintf_func) (info->stream, "$sp%d", DECODE_INSN_RA (insn)); break; case A_H: (*info->fprintf_func) (info->stream, "$ch%d", DECODE_INSN_RA (insn)); break; case A_P: paren++; (*info->fprintf_func) (info->stream, "("); break; case A_U7A: (*info->fprintf_func) (info->stream, "%d", 173 - DECODE_INSN_U8 (insn)); break; case A_U7B: (*info->fprintf_func) (info->stream, "%d", 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); (*info->fprintf_func) (info->stream, "%d", hex_value); break; case A_S11: (*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4, info); break; case A_S11I: (*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4, info); break; case A_S10: case A_S10B: hex_value = DECODE_INSN_I10 (insn); (*info->fprintf_func) (info->stream, "%d", hex_value); break; case A_S14: hex_value = DECODE_INSN_I10 (insn) * 16; (*info->fprintf_func) (info->stream, "%d", hex_value); break; case A_S16: hex_value = DECODE_INSN_I16 (insn); (*info->fprintf_func) (info->stream, "%d", hex_value); break; case A_X16: hex_value = DECODE_INSN_U16 (insn); (*info->fprintf_func) (info->stream, "%u", hex_value); break; case A_R18: value = DECODE_INSN_I16 (insn) * 4; if (value == 0) (*info->fprintf_func) (info->stream, "%d", value); else { hex_value = memaddr + value; (*info->print_address_func) (hex_value & 0x3ffff, info); } break; case A_S18: value = DECODE_INSN_U16 (insn) * 4; if (value == 0) (*info->fprintf_func) (info->stream, "%d", value); else (*info->print_address_func) (value, info); break; case A_U18: value = DECODE_INSN_U18 (insn); if (value == 0 || !(*info->symbol_at_address_func)(0, info)) { hex_value = value; (*info->fprintf_func) (info->stream, "%u", value); } else (*info->print_address_func) (value, info); break; case A_U14: hex_value = DECODE_INSN_U14 (insn); (*info->fprintf_func) (info->stream, "%u", hex_value); break; } if (arg != A_P && paren) { (*info->fprintf_func) (info->stream, ")"); paren--; } } if (hex_value > 16) (*info->fprintf_func) (info->stream, "\t# %x", hex_value); } return 4; }