135 lines
4 KiB
C
135 lines
4 KiB
C
/* tilegx-dis.c. Disassembly routines for the TILE-Gx architecture.
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Copyright (C) 2011-2014 Free Software Foundation, Inc.
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This file is part of the GNU opcodes library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include <stddef.h>
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#include <assert.h>
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#include "bfd.h"
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#include "elf/tilegx.h"
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#include "elf-bfd.h"
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#include "dis-asm.h"
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#include "opcode/tilegx.h"
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int
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print_insn_tilegx (bfd_vma memaddr, disassemble_info *info)
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{
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struct tilegx_decoded_instruction
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decoded[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];
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bfd_byte opbuf[TILEGX_BUNDLE_SIZE_IN_BYTES];
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int status, i, num_instructions, num_printed;
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tilegx_mnemonic padding_mnemonic;
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status = (*info->read_memory_func) (memaddr, opbuf,
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TILEGX_BUNDLE_SIZE_IN_BYTES, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, memaddr, info);
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return -1;
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}
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info->bytes_per_line = TILEGX_BUNDLE_SIZE_IN_BYTES;
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info->bytes_per_chunk = TILEGX_BUNDLE_SIZE_IN_BYTES;
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info->octets_per_byte = 1;
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info->display_endian = BFD_ENDIAN_LITTLE;
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/* Parse the instructions in the bundle. */
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num_instructions =
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parse_insn_tilegx (bfd_getl64 (opbuf), memaddr, decoded);
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/* Print the instructions in the bundle. */
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info->fprintf_func (info->stream, "{ ");
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num_printed = 0;
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/* Determine which nop opcode is used for padding and should be skipped. */
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padding_mnemonic = TILEGX_OPC_FNOP;
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for (i = 0; i < num_instructions; i++)
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{
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if (!decoded[i].opcode->can_bundle)
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{
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/* Instructions that cannot be bundled are padded out with nops,
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rather than fnops. Displaying them is always clutter. */
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padding_mnemonic = TILEGX_OPC_NOP;
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break;
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}
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}
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for (i = 0; i < num_instructions; i++)
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{
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const struct tilegx_opcode *opcode = decoded[i].opcode;
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const char *name;
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int j;
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/* Do not print out fnops, unless everything is an fnop, in
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which case we will print out just the last one. */
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if (opcode->mnemonic == padding_mnemonic
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&& (num_printed > 0 || i + 1 < num_instructions))
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continue;
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if (num_printed > 0)
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info->fprintf_func (info->stream, " ; ");
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++num_printed;
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name = opcode->name;
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if (name == NULL)
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name = "<invalid>";
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info->fprintf_func (info->stream, "%s", name);
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for (j = 0; j < opcode->num_operands; j++)
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{
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bfd_vma num;
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const struct tilegx_operand *op;
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const char *spr_name;
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if (j > 0)
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info->fprintf_func (info->stream, ",");
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info->fprintf_func (info->stream, " ");
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num = decoded[i].operand_values[j];
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op = decoded[i].operands[j];
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switch (op->type)
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{
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case TILEGX_OP_TYPE_REGISTER:
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info->fprintf_func (info->stream, "%s",
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tilegx_register_names[(int) num]);
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break;
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case TILEGX_OP_TYPE_SPR:
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spr_name = get_tilegx_spr_name (num);
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if (spr_name != NULL)
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info->fprintf_func (info->stream, "%s", spr_name);
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else
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info->fprintf_func (info->stream, "%d", (int)num);
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break;
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case TILEGX_OP_TYPE_IMMEDIATE:
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info->fprintf_func (info->stream, "%d", (int)num);
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break;
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case TILEGX_OP_TYPE_ADDRESS:
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info->print_address_func (num, info);
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break;
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default:
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abort ();
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}
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}
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}
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info->fprintf_func (info->stream, " }");
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return TILEGX_BUNDLE_SIZE_IN_BYTES;
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}
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