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cell-binutils  2.17cvs20070401
Functions
m10200-dis.c File Reference
#include <stdio.h>
#include "sysdep.h"
#include "opcode/mn10200.h"
#include "dis-asm.h"
#include "opintl.h"

Go to the source code of this file.

Functions

static void disassemble (bfd_vma memaddr, struct disassemble_info *info, unsigned long insn, unsigned long extension, unsigned int size)
int print_insn_mn10200 (bfd_vma memaddr, struct disassemble_info *info)

Function Documentation

static void disassemble ( bfd_vma  memaddr,
struct disassemble_info info,
unsigned long  insn,
unsigned long  extension,
unsigned int  size 
) [static]

Definition at line 27 of file m10200-dis.c.

{
  struct mn10200_opcode *op = (struct mn10200_opcode *)mn10200_opcodes;
  const struct mn10200_operand *operand;
  int match = 0;

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

      if (op->format == FMT_1)
       mysize = 1;
      else if (op->format == FMT_2
              || op->format == FMT_4)
       mysize = 2;
      else if (op->format == FMT_3
              || op->format == FMT_5)
       mysize = 3;
      else if (op->format == FMT_6)
       mysize = 4;
      else if (op->format == FMT_7)
       mysize = 5;
      else
       abort ();
       
      if (op->format == FMT_2 || op->format == FMT_5)
       extra_shift = 8;
      else if (op->format == FMT_3
              || op->format == FMT_6
              || op->format == FMT_7)
       extra_shift = 16;
      else
       extra_shift = 0;

      if ((op->mask & insn) == op->opcode
         && size == (unsigned int) mysize)
       {
         const unsigned char *opindex_ptr;
         unsigned int nocomma;
         int paren = 0;
         
         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 = &mn10200_operands[*opindex_ptr];

             if ((operand->flags & MN10200_OPERAND_EXTENDED) != 0)
              {
                value = (insn & 0xffff) << 8;
                value |= extension;
              }
             else
              {
                value = ((insn >> (operand->shift))
                        & ((1L << operand->bits) - 1L));
              }

             if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
              value = ((long)(value << (32 - operand->bits))
                       >> (32 - operand->bits));

             if (!nocomma
                && (!paren
                    || ((operand->flags & MN10200_OPERAND_PAREN) == 0)))
              (*info->fprintf_func) (info->stream, ",");

             nocomma = 0;
              
             if ((operand->flags & MN10200_OPERAND_DREG) != 0)
              {
                value = ((insn >> (operand->shift + extra_shift))
                        & ((1 << operand->bits) - 1));
                (*info->fprintf_func) (info->stream, "d%ld", value);
              }

             else if ((operand->flags & MN10200_OPERAND_AREG) != 0)
              {
                value = ((insn >> (operand->shift + extra_shift))
                        & ((1 << operand->bits) - 1));
                (*info->fprintf_func) (info->stream, "a%ld", value);
              }

             else if ((operand->flags & MN10200_OPERAND_PSW) != 0)
              (*info->fprintf_func) (info->stream, "psw");

             else if ((operand->flags & MN10200_OPERAND_MDR) != 0)
              (*info->fprintf_func) (info->stream, "mdr");

             else if ((operand->flags & MN10200_OPERAND_PAREN) != 0)
              {
                if (paren)
                  (*info->fprintf_func) (info->stream, ")");
                else
                  {
                    (*info->fprintf_func) (info->stream, "(");
                    nocomma = 1;
                  }
                paren = !paren;
              }

             else if ((operand->flags & MN10200_OPERAND_PCREL) != 0)
              (*info->print_address_func)
                ((value + memaddr + mysize) & 0xffffff, info);

             else if ((operand->flags & MN10200_OPERAND_MEMADDR) != 0)
              (*info->print_address_func) (value, info);

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

  if (!match)
    (*info->fprintf_func) (info->stream, _("unknown\t0x%04lx"), insn);
}

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Definition at line 160 of file m10200-dis.c.

{
  int status;
  bfd_byte buffer[4];
  unsigned long insn;
  unsigned long extension = 0;
  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 & 0xf0) == 0x00
      || (insn & 0xf0) == 0x10
      || (insn & 0xf0) == 0x20
      || (insn & 0xf0) == 0x30
      || ((insn & 0xf0) == 0x80
         && (insn & 0x0c) >> 2 != (insn & 0x03))
      || (insn & 0xf0) == 0x90
      || (insn & 0xf0) == 0xa0
      || (insn & 0xf0) == 0xb0
      || (insn & 0xff) == 0xeb
      || (insn & 0xff) == 0xf6
      || (insn & 0xff) == 0xfe
      || (insn & 0xff) == 0xff)
    {
      extension = 0;
      consume = 1;
    }

  /* These are two byte insns.  */
  else if ((insn & 0xf0) == 0x40
          || (insn & 0xf0) == 0x50
          || (insn & 0xf0) == 0x60
          || (insn & 0xf0) == 0x70
          || (insn & 0xf0) == 0x80
          || (insn & 0xfc) == 0xd0
          || (insn & 0xfc) == 0xd4
          || (insn & 0xfc) == 0xd8
          || (insn & 0xfc) == 0xe0
          || (insn & 0xfc) == 0xe4
          || (insn & 0xff) == 0xe8
          || (insn & 0xff) == 0xe9
          || (insn & 0xff) == 0xea
          || (insn & 0xff) == 0xf0
          || (insn & 0xff) == 0xf1
          || (insn & 0xff) == 0xf2
          || (insn & 0xff) == 0xf3)
    {
      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 with a 16bit operand in little
     endian form.  */
  else if ((insn & 0xf0) == 0xc0
          || (insn & 0xfc) == 0xdc
          || (insn & 0xfc) == 0xec
          || (insn & 0xff) == 0xf8
          || (insn & 0xff) == 0xf9
          || (insn & 0xff) == 0xfa
          || (insn & 0xff) == 0xfb
          || (insn & 0xff) == 0xfc
          || (insn & 0xff) == 0xfd)
    {
      status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      insn <<= 16;
      insn |= bfd_getl16 (buffer);
      extension = 0;
      consume = 3;
    }
  /* These are three byte insns too, but we don't have to mess with
     endianness stuff.  */
  else if ((insn & 0xff) == 0xf5)
    {
      status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      insn <<= 16;
      insn |= bfd_getb16 (buffer);
      extension = 0;
      consume = 3;
    }

  /* These are four byte insns.  */
  else if ((insn & 0xff) == 0xf7)
    {
      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 <<= 16;
      status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      insn |= bfd_getl16 (buffer);
      extension = 0;
      consume = 4;
    }

  /* These are five byte insns.  */
  else if ((insn & 0xff) == 0xf4)
    {
      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 <<= 16;

      status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      insn |= (*(unsigned char *)buffer << 8) & 0xff00;

      status = (*info->read_memory_func) (memaddr + 3, buffer, 1, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      insn |= (*(unsigned char *)buffer) & 0xff;

      status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info);
      if (status != 0)
       {
         (*info->memory_error_func) (status, memaddr, info);
         return -1;
       }
      extension = (*(unsigned char *)buffer) & 0xff;
      consume = 5;
    }
  else
    {
      (*info->fprintf_func) (info->stream, _("unknown\t0x%02lx"), insn);
      return 1;
    }

  disassemble (memaddr, info, insn, extension, consume);

  return consume;
}

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