osprey/cygnus/opcodes/m10300-dis.c

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/*
 * Copyright 2003, 2004, 2005, 2006 PathScale, Inc.  All Rights Reserved.
 */

/* Disassemble MN10300 instructions.
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003
   Free Software Foundation, Inc.

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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */


#include <stdio.h>

#include "sysdep.h"
#include "opcode/mn10300.h"
#include "dis-asm.h"
#include "opintl.h"

static void disassemble PARAMS ((bfd_vma, struct disassemble_info *,
         unsigned long insn, unsigned int));

#define HAVE_AM33_2 (info->mach == AM33_2)
#define HAVE_AM33 (info->mach == AM33 || HAVE_AM33_2)
#define HAVE_AM30 (info->mach == AM30)

int
print_insn_mn10300 (memaddr, info)
     bfd_vma memaddr;
     struct disassemble_info *info;
{
  int status;
  bfd_byte buffer[4];
  unsigned long insn;
  unsigned int consume;

  /* First figure out how big the opcode is.  */
  status = (*info->read_memory_func) (memaddr, buffer, 1, info);
  if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return -1;
    }
  insn = *(unsigned char *) buffer;

  /* These are one byte insns.  */
  if ((insn & 0xf3) == 0x00
      || (insn & 0xf0) == 0x10
      || (insn & 0xfc) == 0x3c
      || (insn & 0xf3) == 0x41
      || (insn & 0xf3) == 0x40
      || (insn & 0xfc) == 0x50
      || (insn & 0xfc) == 0x54
      || (insn & 0xf0) == 0x60
      || (insn & 0xf0) == 0x70
      || ((insn & 0xf0) == 0x80
    && (insn & 0x0c) >> 2 != (insn & 0x03))
      || ((insn & 0xf0) == 0x90
    && (insn & 0x0c) >> 2 != (insn & 0x03))
      || ((insn & 0xf0) == 0xa0
    && (insn & 0x0c) >> 2 != (insn & 0x03))
      || ((insn & 0xf0) == 0xb0
    && (insn & 0x0c) >> 2 != (insn & 0x03))
      || (insn & 0xff) == 0xcb
      || (insn & 0xfc) == 0xd0
      || (insn & 0xfc) == 0xd4
      || (insn & 0xfc) == 0xd8
      || (insn & 0xf0) == 0xe0
      || (insn & 0xff) == 0xff)
    {
      consume = 1;
    }

  /* These are two byte insns.  */
  else if ((insn & 0xf0) == 0x80
     || (insn & 0xf0) == 0x90
     || (insn & 0xf0) == 0xa0
     || (insn & 0xf0) == 0xb0
     || (insn & 0xfc) == 0x20
     || (insn & 0xfc) == 0x28
     || (insn & 0xf3) == 0x43
     || (insn & 0xf3) == 0x42
     || (insn & 0xfc) == 0x58
     || (insn & 0xfc) == 0x5c
     || ((insn & 0xf0) == 0xc0
         && (insn & 0xff) != 0xcb
         && (insn & 0xff) != 0xcc
         && (insn & 0xff) != 0xcd)
     || (insn & 0xff) == 0xf0
     || (insn & 0xff) == 0xf1
     || (insn & 0xff) == 0xf2
     || (insn & 0xff) == 0xf3
     || (insn & 0xff) == 0xf4
     || (insn & 0xff) == 0xf5
     || (insn & 0xff) == 0xf6)
    {
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
      if (status != 0)
  {
    (*info->memory_error_func) (status, memaddr, info);
    return -1;
  }
      insn = bfd_getb16 (buffer);
      consume = 2;
    }

  /* These are three byte insns.  */
  else if ((insn & 0xff) == 0xf8
     || (insn & 0xff) == 0xcc
     || (insn & 0xff) == 0xf9
     || (insn & 0xf3) == 0x01
     || (insn & 0xf3) == 0x02
     || (insn & 0xf3) == 0x03
     || (insn & 0xfc) == 0x24
     || (insn & 0xfc) == 0x2c
     || (insn & 0xfc) == 0x30
     || (insn & 0xfc) == 0x34
     || (insn & 0xfc) == 0x38
     || (insn & 0xff) == 0xde
     || (insn & 0xff) == 0xdf
     || (insn & 0xff) == 0xf9
     || (insn & 0xff) == 0xcc)
    {
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
      if (status != 0)
  {
    (*info->memory_error_func) (status, memaddr, info);
    return -1;
  }
      insn = bfd_getb16 (buffer);
      insn <<= 8;
      status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info);
      if (status != 0)
  {
    (*info->memory_error_func) (status, memaddr, info);
    return -1;
  }
      insn |= *(unsigned char *) buffer;
      consume = 3;
    }

  /* These are four byte insns.  */
  else if ((insn & 0xff) == 0xfa
     || (insn & 0xff) == 0xf7
     || (insn & 0xff) == 0xfb)
    {
      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);
      consume = 4;
    }

  /* These are five byte insns.  */
  else if ((insn & 0xff) == 0xcd
     || (insn & 0xff) == 0xdc)
    {
      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);
      consume = 5;
    }

  /* These are six byte insns.  */
  else if ((insn & 0xff) == 0xfd
     || (insn & 0xff) == 0xfc)
    {
      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);
      consume = 6;
    }

  /* Else its a seven byte insns (in theory).  */
  else
    {
      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);
      consume = 7;
      /* Handle the 5-byte extended instruction codes.  */
      if ((insn & 0xfff80000) == 0xfe800000)
  consume = 5;
    }

  disassemble (memaddr, info, insn, consume);

  return consume;
}

static void
disassemble (memaddr, info, insn, size)
     bfd_vma memaddr;
     struct disassemble_info *info;
     unsigned long insn;
     unsigned int size;
{
  struct mn10300_opcode *op = (struct mn10300_opcode *)mn10300_opcodes;
  const struct mn10300_operand *operand;
  bfd_byte buffer[4];
  unsigned long extension = 0;
  int status, match = 0;

  /* Find the opcode.  */
  while (op->name)
    {
      int mysize, extra_shift;

      if (op->format == FMT_S0)
  mysize = 1;
      else if (op->format == FMT_S1
         || op->format == FMT_D0)
  mysize = 2;
      else if (op->format == FMT_S2
         || op->format == FMT_D1)
  mysize = 3;
      else if (op->format == FMT_S4)
  mysize = 5;
      else if (op->format == FMT_D2)
  mysize = 4;
      else if (op->format == FMT_D3)
  mysize = 5;
      else if (op->format == FMT_D4)
  mysize = 6;
      else if (op->format == FMT_D6)
  mysize = 3;
      else if (op->format == FMT_D7 || op->format == FMT_D10)
  mysize = 4;
      else if (op->format == FMT_D8)
  mysize = 6;
      else if (op->format == FMT_D9)
  mysize = 7;
      else
  mysize = 7;

      if ((op->mask & insn) == op->opcode
    && size == (unsigned int) mysize
    && (op->machine == 0
        || (op->machine == AM33_2 && HAVE_AM33_2)
        || (op->machine == AM33 && HAVE_AM33)
        || (op->machine == AM30 && HAVE_AM30)))
  {
    const unsigned char *opindex_ptr;
    unsigned int nocomma;
    int paren = 0;

    if (op->format == FMT_D1 || op->format == FMT_S1)
      extra_shift = 8;
    else if (op->format == FMT_D2 || op->format == FMT_D4
       || op->format == FMT_S2 || op->format == FMT_S4
       || op->format == FMT_S6 || op->format == FMT_D5)
      extra_shift = 16;
    else if (op->format == FMT_D7
       || op->format == FMT_D8
       || op->format == FMT_D9)
      extra_shift = 8;
    else
      extra_shift = 0;

    if (size == 1 || size == 2)
      {
        extension = 0;
      }
    else if (size == 3
       && (op->format == FMT_D1
           || op->opcode == 0xdf0000
           || op->opcode == 0xde0000))
      {
        extension = 0;
      }
    else if (size == 3
       && op->format == FMT_D6)
      {
        extension = 0;
      }
    else if (size == 3)
      {
        insn &= 0xff0000;
        status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }

        insn |= bfd_getl16 (buffer);
        extension = 0;
      }
    else if (size == 4
       && (op->opcode == 0xfaf80000
           || op->opcode == 0xfaf00000
           || op->opcode == 0xfaf40000))
      {
        extension = 0;
      }
    else if (size == 4
       && (op->format == FMT_D7
           || op->format == FMT_D10))
      {
        extension = 0;
      }
    else if (size == 4)
      {
        insn &= 0xffff0000;
        status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }

        insn |= bfd_getl16 (buffer);
        extension = 0;
      }
    else if (size == 5 && op->opcode == 0xdc000000)
      {
        unsigned long temp = 0;
        status = (*info->read_memory_func) (memaddr + 1, buffer, 4, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        temp |= bfd_getl32 (buffer);

        insn &= 0xff000000;
        insn |= (temp & 0xffffff00) >> 8;
        extension = temp & 0xff;
      }
    else if (size == 5 && op->format == FMT_D3)
      {
        status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        insn &= 0xffff0000;
        insn |= bfd_getl16 (buffer);

        status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension = *(unsigned char *) buffer;
      }
    else if (size == 5)
      {
        unsigned long temp = 0;
        status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        temp |= bfd_getl16 (buffer);

        insn &= 0xff0000ff;
        insn |= temp << 8;

        status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension = *(unsigned char *) buffer;
      }
    else if (size == 6 && op->format == FMT_D8)
      {
        insn &= 0xffffff00;
        status = (*info->read_memory_func) (memaddr + 5, buffer, 1, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        insn |= *(unsigned char *) buffer;

        status = (*info->read_memory_func) (memaddr + 3, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension = bfd_getl16 (buffer);
      }
    else if (size == 6)
      {
        unsigned long temp = 0;
        status = (*info->read_memory_func) (memaddr + 2, buffer, 4, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        temp |= bfd_getl32 (buffer);

        insn &= 0xffff0000;
        insn |= (temp >> 16) & 0xffff;
        extension = temp & 0xffff;
      }
    else if (size == 7 && op->format == FMT_D9)
      {
        insn &= 0xffffff00;
        status = (*info->read_memory_func) (memaddr + 3, buffer, 4, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension = bfd_getl32 (buffer);
        insn |= (extension & 0xff000000) >> 24;
        extension &= 0xffffff;
      }
    else if (size == 7 && op->opcode == 0xdd000000)
      {
        unsigned long temp = 0;
        status = (*info->read_memory_func) (memaddr + 1, buffer, 4, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        temp |= bfd_getl32 (buffer);

        insn &= 0xff000000;
        insn |= (temp >> 8) & 0xffffff;
        extension = (temp & 0xff) << 16;

        status = (*info->read_memory_func) (memaddr + 5, buffer, 2, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension |= bfd_getb16 (buffer);
      }
    else if (size == 7)
      {
        unsigned long temp = 0;
        status = (*info->read_memory_func) (memaddr + 2, buffer, 4, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        temp |= bfd_getl32 (buffer);

        insn &= 0xffff0000;
        insn |= (temp >> 16) & 0xffff;
        extension = (temp & 0xffff) << 8;

        status = (*info->read_memory_func) (memaddr + 6, buffer, 1, info);
        if (status != 0)
    {
      (*info->memory_error_func) (status, memaddr, info);
      return;
    }
        extension |= *(unsigned char *) buffer;
      }

    match = 1;
    (*info->fprintf_func) (info->stream, "%s\t", op->name);

    /* Now print the operands.  */
    for (opindex_ptr = op->operands, nocomma = 1;
         *opindex_ptr != 0;
         opindex_ptr++)
      {
        unsigned long value;

        operand = &mn10300_operands[*opindex_ptr];

        /* If this operand is a PLUS (autoincrement), then do not emit
     a comma before emitting the plus.  */
        if ((operand->flags & MN10300_OPERAND_PLUS) != 0)
    nocomma = 1;

        if ((operand->flags & MN10300_OPERAND_SPLIT) != 0)
    {
      unsigned long temp;
      value = insn & ((1 << operand->bits) - 1);
      value <<= (32 - operand->bits);
      temp = extension >> operand->shift;
      temp &= ((1 << (32 - operand->bits)) - 1);
      value |= temp;
      value = ((value ^ (((unsigned long) 1) << 31))
         - (((unsigned long) 1) << 31));
    }
        else if ((operand->flags & MN10300_OPERAND_24BIT) != 0)
    {
      unsigned long temp;
      value = insn & ((1 << operand->bits) - 1);
      value <<= (24 - operand->bits);
      temp = extension >> operand->shift;
      temp &= ((1 << (24 - operand->bits)) - 1);
      value |= temp;
      if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
        value = ((value & 0xffffff) ^ 0x800000) - 0x800000;
    }
        else if ((operand->flags & (MN10300_OPERAND_FSREG
            | MN10300_OPERAND_FDREG)))
    {
      /* See m10300-opc.c just before #define FSM0 for an
         explanation of these variables.  Note that
         FMT-implied shifts are not taken into account for
         FP registers.  */
      unsigned long mask_low, mask_high;
      int shl_low, shr_high, shl_high;

      switch (operand->bits)
        {
        case 5:
          /* Handle regular FP registers.  */
          if (operand->shift >= 0)
      {
        /* This is an `m' register.  */
        shl_low = operand->shift;
        shl_high = 8 + (8 & shl_low) + (shl_low & 4) / 4;
      }
          else
      {
        /* This is an `n' register.  */
        shl_low = -operand->shift;
        shl_high = shl_low / 4;
      }
          mask_low = 0x0f;
          mask_high = 0x10;
          shr_high = 4;
          break;

        case 3:
          /* Handle accumulators.  */
          shl_low = -operand->shift;
          shl_high = 0;
          mask_low = 0x03;
          mask_high = 0x04;
          shr_high = 2;
          break;

        default:
          abort ();
        }
      value = ((((insn >> shl_high) << shr_high) & mask_high)
         | ((insn >> shl_low) & mask_low));
    }
        else if ((operand->flags & MN10300_OPERAND_EXTENDED) != 0)
    {
      value = ((extension >> (operand->shift))
         & ((1 << operand->bits) - 1));
    }
        else
    {
      value = ((insn >> (operand->shift))
         & ((1 << operand->bits) - 1));
    }

        if ((operand->flags & MN10300_OPERAND_SIGNED) != 0
      /* These are properly extended by the code above.  */
      && ((operand->flags & MN10300_OPERAND_24BIT) == 0))
    value = ((value ^ (((unsigned long) 1) << (operand->bits - 1)))
       - (((unsigned long) 1) << (operand->bits - 1)));

        if (!nocomma
      && (!paren
          || ((operand->flags & MN10300_OPERAND_PAREN) == 0)))
    (*info->fprintf_func) (info->stream, ",");

        nocomma = 0;

        if ((operand->flags & MN10300_OPERAND_DREG) != 0)
    {
      value = ((insn >> (operand->shift + extra_shift))
         & ((1 << operand->bits) - 1));
      (*info->fprintf_func) (info->stream, "d%d", (int) value);
    }

        else if ((operand->flags & MN10300_OPERAND_AREG) != 0)
    {
      value = ((insn >> (operand->shift + extra_shift))
         & ((1 << operand->bits) - 1));
      (*info->fprintf_func) (info->stream, "a%d", (int) value);
    }

        else if ((operand->flags & MN10300_OPERAND_SP) != 0)
    (*info->fprintf_func) (info->stream, "sp");

        else if ((operand->flags & MN10300_OPERAND_PSW) != 0)
    (*info->fprintf_func) (info->stream, "psw");

        else if ((operand->flags & MN10300_OPERAND_MDR) != 0)
    (*info->fprintf_func) (info->stream, "mdr");

        else if ((operand->flags & MN10300_OPERAND_RREG) != 0)
    {
      value = ((insn >> (operand->shift + extra_shift))
         & ((1 << operand->bits) - 1));
      if (value < 8)
        (*info->fprintf_func) (info->stream, "r%d", (int) value);
      else if (value < 12)
        (*info->fprintf_func) (info->stream, "a%d", (int) value - 8);
      else
        (*info->fprintf_func) (info->stream, "d%d", (int) value - 12);
    }

        else if ((operand->flags & MN10300_OPERAND_XRREG) != 0)
    {
      value = ((insn >> (operand->shift + extra_shift))
         & ((1 << operand->bits) - 1));
      if (value == 0)
        (*info->fprintf_func) (info->stream, "sp", value);
      else
        (*info->fprintf_func) (info->stream, "xr%d", (int) value);
    }

        else if ((operand->flags & MN10300_OPERAND_FSREG) != 0)
    (*info->fprintf_func) (info->stream, "fs%d", (int) value);

        else if ((operand->flags & MN10300_OPERAND_FDREG) != 0)
    (*info->fprintf_func) (info->stream, "fd%d", (int) value);

        else if ((operand->flags & MN10300_OPERAND_FPCR) != 0)
    (*info->fprintf_func) (info->stream, "fpcr");

        else if ((operand->flags & MN10300_OPERAND_USP) != 0)
    (*info->fprintf_func) (info->stream, "usp");

        else if ((operand->flags & MN10300_OPERAND_SSP) != 0)
    (*info->fprintf_func) (info->stream, "ssp");

        else if ((operand->flags & MN10300_OPERAND_MSP) != 0)
    (*info->fprintf_func) (info->stream, "msp");

        else if ((operand->flags & MN10300_OPERAND_PC) != 0)
    (*info->fprintf_func) (info->stream, "pc");

        else if ((operand->flags & MN10300_OPERAND_EPSW) != 0)
    (*info->fprintf_func) (info->stream, "epsw");

        else if ((operand->flags & MN10300_OPERAND_PLUS) != 0)
    (*info->fprintf_func) (info->stream, "+");

        else if ((operand->flags & MN10300_OPERAND_PAREN) != 0)
    {
      if (paren)
        (*info->fprintf_func) (info->stream, ")");
      else
        {
          (*info->fprintf_func) (info->stream, "(");
          nocomma = 1;
        }
      paren = !paren;
    }

        else if ((operand->flags & MN10300_OPERAND_PCREL) != 0)
    (*info->print_address_func) ((long) value + memaddr, info);

        else if ((operand->flags & MN10300_OPERAND_MEMADDR) != 0)
    (*info->print_address_func) (value, info);

        else if ((operand->flags & MN10300_OPERAND_REG_LIST) != 0)
    {
      int comma = 0;

      (*info->fprintf_func) (info->stream, "[");
      if (value & 0x80)
        {
          (*info->fprintf_func) (info->stream, "d2");
          comma = 1;
        }

      if (value & 0x40)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "d3");
          comma = 1;
        }

      if (value & 0x20)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "a2");
          comma = 1;
        }

      if (value & 0x10)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "a3");
          comma = 1;
        }

      if (value & 0x08)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "other");
          comma = 1;
        }

      if (value & 0x04)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "exreg0");
          comma = 1;
        }
      if (value & 0x02)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "exreg1");
          comma = 1;
        }
      if (value & 0x01)
        {
          if (comma)
      (*info->fprintf_func) (info->stream, ",");
          (*info->fprintf_func) (info->stream, "exother");
          comma = 1;
        }
      (*info->fprintf_func) (info->stream, "]");
    }

        else
    (*info->fprintf_func) (info->stream, "%ld", (long) value);
      }
    /* All done. */
    break;
  }
      op++;
    }

  if (!match)
    {
      /* xgettext:c-format */
      (*info->fprintf_func) (info->stream, _("unknown\t0x%04x"), insn);
    }
}

---