Subversion Repositories open8_urisc

/* tilegx-dis.c.  Disassembly routines for the TILE-Gx architecture.

   Copyright 2011 Free Software Foundation, Inc.

   This file is part of the GNU opcodes library.

   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 3 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 <stddef.h>

#include <assert.h>

#include "bfd.h"

#include "elf/tilegx.h"

#include "elf-bfd.h"

#include "sysdep.h"

#include "dis-asm.h"

#include "opcode/tilegx.h"

int

print_insn_tilegx (bfd_vma memaddr, disassemble_info *info)

{

  struct tilegx_decoded_instruction

    decoded[TILEGX_MAX_INSTRUCTIONS_PER_BUNDLE];

  bfd_byte opbuf[TILEGX_BUNDLE_SIZE_IN_BYTES];

  int status, i, num_instructions, num_printed;

  tilegx_mnemonic padding_mnemonic;

  status = (*info->read_memory_func) (memaddr, opbuf,

                                      TILEGX_BUNDLE_SIZE_IN_BYTES, info);

  if (status != 0)

    {

      (*info->memory_error_func) (status, memaddr, info);

      return -1;

    }

  info->bytes_per_line = TILEGX_BUNDLE_SIZE_IN_BYTES;

  info->bytes_per_chunk = TILEGX_BUNDLE_SIZE_IN_BYTES;

  info->octets_per_byte = 1;

  info->display_endian = BFD_ENDIAN_LITTLE;

  /* Parse the instructions in the bundle.  */

  num_instructions =

    parse_insn_tilegx (bfd_getl64 (opbuf), memaddr, decoded);

  /* Print the instructions in the bundle.  */

  info->fprintf_func (info->stream, "{ ");

  num_printed = 0;

  /* Determine which nop opcode is used for padding and should be skipped.  */

  padding_mnemonic = TILEGX_OPC_FNOP;

  for (i = 0; i < num_instructions; i++)

    {

      if (!decoded[i].opcode->can_bundle)

        {

          /* Instructions that cannot be bundled are padded out with nops,

             rather than fnops. Displaying them is always clutter. */

          padding_mnemonic = TILEGX_OPC_NOP;

          break;

        }

    }

  for (i = 0; i < num_instructions; i++)

    {

      const struct tilegx_opcode *opcode = decoded[i].opcode;

      const char *name;

      int j;

      /* Do not print out fnops, unless everything is an fnop, in

         which case we will print out just the last one. */

      if (opcode->mnemonic == padding_mnemonic

          && (num_printed > 0 || i + 1 < num_instructions))

        continue;

      if (num_printed > 0)

        info->fprintf_func (info->stream, " ; ");

      ++num_printed;

      name = opcode->name;

      if (name == NULL)

        name = "<invalid>";

      info->fprintf_func (info->stream, "%s", name);

      for (j = 0; j < opcode->num_operands; j++)

        {

          bfd_vma num;

          const struct tilegx_operand *op;

          const char *spr_name;

          if (j > 0)

            info->fprintf_func (info->stream, ",");

          info->fprintf_func (info->stream, " ");

          num = decoded[i].operand_values[j];

          op = decoded[i].operands[j];

          switch (op->type)

            {

            case TILEGX_OP_TYPE_REGISTER:

              info->fprintf_func (info->stream, "%s",

                                  tilegx_register_names[(int) num]);

              break;

            case TILEGX_OP_TYPE_SPR:

              spr_name = get_tilegx_spr_name (num);

              if (spr_name != NULL)

                info->fprintf_func (info->stream, "%s", spr_name);

              else

                info->fprintf_func (info->stream, "%d", (int)num);

              break;

            case TILEGX_OP_TYPE_IMMEDIATE:

              info->fprintf_func (info->stream, "%d", (int)num);

              break;

            case TILEGX_OP_TYPE_ADDRESS:

              info->print_address_func (num, info);

              break;

            default:

              abort ();

            }

        }

    }

  info->fprintf_func (info->stream, " }");

  return TILEGX_BUNDLE_SIZE_IN_BYTES;

}