2006-08-10 Andrew Stubbs <andrew.stubbs@st.com>

[deliverable/binutils-gdb.git] / opcodes / w65-dis.c

/* Disassemble WDC 65816 instructions.
   Copyright 1995, 1998, 2000, 2001, 2002, 2005
   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., 51 Franklin Street - Fifth Floor, Boston,
   MA 02110-1301, USA.  */

#include <stdio.h>
#include "sysdep.h"
#define STATIC_TABLE
#define DEFINE_TABLE

#include "w65-opc.h"
#include "dis-asm.h"

static fprintf_ftype fpr;
static void *stream;
static struct disassemble_info *local_info;

static void
print_operand (int lookup, char *format, int *args)
{
  int val;
  int c;

  while (*format)
    {
      switch (c = *format++)
	{
	case '$':
	  val = args[(*format++) - '0'];
	  if (lookup)
	    local_info->print_address_func (val, local_info);
	  else
	    fpr (stream, "0x%x", val);

	  break;
	default:
	  fpr (stream, "%c", c);
	  break;
	}
    }
}

int
print_insn_w65 (bfd_vma memaddr, struct disassemble_info *info)
{
  int status = 0;
  unsigned char insn[4];
  const struct opinfo *op;
  int i;
  int X = 0;
  int M = 0;
  int args[2];

  stream = info->stream;
  fpr = info->fprintf_func;
  local_info = info;

  for (i = 0; i < 4 && status == 0; i++)
    status = info->read_memory_func (memaddr + i, insn + i, 1, info);

  for (op = optable; op->val != insn[0]; op++)
    ;

  fpr (stream, "%s", op->name);

  /* Prepare all the posible operand values.  */
  {
    int size = 1;
    int asR_W65_ABS8 = insn[1];
    int asR_W65_ABS16 = (insn[2] << 8) + asR_W65_ABS8;
    int asR_W65_ABS24 = (insn[3] << 16) + asR_W65_ABS16;
    int asR_W65_PCR8 = ((char) (asR_W65_ABS8)) + memaddr + 2;
    int asR_W65_PCR16 = ((short) (asR_W65_ABS16)) + memaddr + 3;

    switch (op->amode)
      {
	DISASM ();
      }

    return size;
  }
}