opcodes/v850-dis.c

   1 /* Disassemble V850 instructions.
   2    Copyright (C) 1996 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18
  19 #include <stdio.h>
  20
  21 #include "ansidecl.h"
  22 #include "opcode/v850.h"
  23 #include "dis-asm.h"
  24
  25 int
  26 print_insn_v850 (memaddr, info)
  27      bfd_vma memaddr;
  28      struct disassemble_info *info;
  29 {
  30   int status;
  31   bfd_byte buffer[4];
  32   unsigned long insn;
  33
  34   status = (*info->read_memory_func) (memaddr, buffer, 4, info);
  35   if (status != 0)
  36     {
  37       (*info->memory_error_func) (status, memaddr, info);
  38       return -1;
  39     }
  40   insn = bfd_getl32 (buffer);
  41
  42   disassemble (insn, info);
  43   if ((insn & 0x0600) == 0x0600)
  44     return 4;
  45   else
  46     return 2;
  47 }
  48
  49 disassemble (insn, info)
  50      unsigned long insn;
  51      struct disassemble_info *info;
  52 {
  53   struct v850_opcode *op = (struct v850_opcode *)v850_opcodes;
  54   int match = 0;
  55   /* If this is a two byte insn, then mask off the high bits. */
  56   if ((insn & 0x0600) != 0x0600)
  57     insn &= 0xffff;
  58
  59   /* Find the opcode.  */
  60   while (op->name)
  61     {
  62       if ((op->mask & insn) == op->opcode)
  63         {
  64           match = 1;
  65           (*info->fprintf_func) (info->stream, "%s\t", op->name);
  66           break;
  67         }
  68       op++;
  69     }
  70
  71   if (!match)
  72     {
  73       if ((insn & 0x0600) != 0x0600)
  74         (*info->fprintf_func) (info->stream, ".short\t0x%04x", insn);
  75       else
  76         (*info->fprintf_func) (info->stream, ".long\t0x%08x", insn);
  77     }
  78 }