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/* Disassemble MN10300 instructions.
Copyright (C) 1996 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 "ansidecl.h"
#include "opcode/mn10300.h"
#include "dis-asm.h"
static void disassemble PARAMS ((bfd_vma, struct disassemble_info *,
unsigned long insn, unsigned long,
unsigned int));
static const char *const mn10300_reg_names[] =
{ "d0", "d1", "d2", "d3", "a0", "a1", "a2", "a3", };
int
print_insn_mn10300 (memaddr, info)
bfd_vma memaddr;
struct disassemble_info *info;
{
int status;
bfd_byte buffer[4];
unsigned long insn;
unsigned long extension;
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 XXX imm8 versions of mov, cmp. */
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)
{
extension = 0;
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);
extension = 0;
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) == 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;
insn |= *(unsigned char *)buffer + 2;
extension = 0;
consume = 3;
}
/* These are four byte insns. */
else if ((insn & 0xff) == 0xfa
|| (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);
extension = 0;
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);
status = (*info->read_memory_func) (memaddr, buffer, 1, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
extension = *(unsigned char *) buffer + 4;
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);
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
extension = bfd_getb16 (buffer + 4);
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);
status = (*info->read_memory_func) (memaddr, buffer, 2, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
extension = bfd_getb16 (buffer);
extension <<= 8;
extension |= *(unsigned char *)buffer + 2;
consume = 7;
}
disassemble (memaddr, info, insn, extension, consume);
return consume;
}
static void
disassemble (memaddr, info, insn, extension, size)
bfd_vma memaddr;
struct disassemble_info *info;
unsigned long insn;
unsigned long extension;
unsigned int size;
{
struct mn10300_opcode *op = (struct mn10300_opcode *)mn10300_opcodes;
const struct mn10300_operand *operand;
int match = 0;
/* Find the opcode. */
while (op->name)
{
int mysize;
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_D4)
mysize = 6;
else
mysize = 7;
if ((op->mask & insn) == op->opcode
&& size == mysize)
{
const unsigned char *opindex_ptr;
unsigned int opnum, memop;
match = 1;
(*info->fprintf_func) (info->stream, "%s\t", op->name);
/* Now print the operands. */
for (opindex_ptr = op->operands, opnum = 1;
*opindex_ptr != 0;
opindex_ptr++, opnum++)
{
unsigned long value;
operand = &mn10300_operands[*opindex_ptr];
value = (insn >> operand->shift) & ((1 << operand->bits) - 1);
if ((operand->flags & MN10300_OPERAND_SIGNED) != 0)
value = ((long)(value << (32 - operand->bits))
>> (32 - operand->bits));
/* All done. */
break;
}
op++;
}
if (!match)
{
(*info->fprintf_func) (info->stream, "unknown\t0x%04x", insn);
}
}
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