/* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly

/* m68hc11-dis.c -- Motorola 68HC11 & 68HC12 disassembly
Copyright (C) 1999-2024 Free Software Foundation, Inc.
Written by Stephane Carrez ([email protected])
XGATE and S12X added by James Murray ([email protected])

This file is part of the GNU opcodes library.

This library 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 3, or (at your option)
any later version.

It 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 "sysdep.h"
#include <stdio.h>

#include "opcode/m68hc11.h"
#include "disassemble.h"

#define PC_REGNUM 3

static const char *const reg_name[] =
{
"X", "Y", "SP", "PC"
};

static const char *const reg_src_table[] =
{
"A", "B", "CCR", "TMP3", "D", "X", "Y", "SP"
};

static const char *const reg_dst_table[] =
{
"A", "B", "CCR", "TMP2", "D", "X", "Y", "SP"
};

#define OP_PAGE_MASK (M6811_OP_PAGE2|M6811_OP_PAGE3|M6811_OP_PAGE4)

static int
read_memory (bfd_vma memaddr, bfd_byte* buffer, int size,
struct disassemble_info* info)
{
int status;

/* Get first byte. Only one at a time because we don't know the
size of the insn. */
status = (*info->read_memory_func) (memaddr, buffer, size, info);
if (status != 0)
{
(*info->memory_error_func) (status, memaddr, info);
return -1;
}
return 0;
}

/* Read the 68HC12 indexed operand byte and print the corresponding mode.
Returns the number of bytes read or -1 if failure. */
static int
print_indexed_operand (bfd_vma memaddr, struct disassemble_info* info,
int* indirect, int mov_insn, int pc_offset,
bfd_vma endaddr, int arch)
{
bfd_byte buffer[4];
int reg;
int status;
bfd_vma val;
int pos = 1;

if (indirect)
*indirect = 0;

status = read_memory (memaddr, &buffer[0], 1, info);
if (status != 0)
{
return status;
}

/* n,r with 5-bits signed constant. */
if ((buffer[0] & 0x20) == 0)
{
reg = (buffer[0] >> 6) & 3;
val = ((buffer[0] & 0x1f) ^ 0x10) - 0x10;
/* 68HC12 requires an adjustment for movb/movw pc relative modes. */
if (reg == PC_REGNUM && info->mach == bfd_mach_m6812 && mov_insn)
val += pc_offset;
(*info->fprintf_func) (info->stream, "0x%x,%s",
(unsigned) val & 0xffff, reg_name[reg]);

if (reg == PC_REGNUM)
{
(* info->fprintf_func) (info->stream, " {");
/* Avoid duplicate 0x from core binutils. */
if (info->symtab_size > 0)
(*info->fprintf_func) (info->stream, "0x");
(* info->print_address_func) (endaddr + val, info);
(* info->fprintf_func) (info->stream, "}");
}
}

/* Auto pre/post increment/decrement. */
else if ((buffer[0] & 0xc0) != 0xc0)
{
const char *mode;

reg = (buffer[0] >> 6) & 3;
val = buffer[0] & 7;
if (buffer[0] & 8)
{
val = 8 - val;
mode = "-";
}
else
{
val = val + 1;
mode = "+";
}
(*info->fprintf_func) (info->stream, "%d,%s%s%s",
(unsigned) val,
buffer[0] & 0x10 ? "" : mode,
reg_name[reg], buffer[0] & 0x10 ? mode : "");
}

/* [n,r] 16-bits offset indexed indirect. */
else if ((buffer[0] & 0x07) == 3)
{
if ((mov_insn) && (!(arch & cpu9s12x)))
{
(*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
buffer[0] & 0x0ff);
return 0;
}
reg = (buffer[0] >> 3) & 0x03;
status = read_memory (memaddr + pos, &buffer[0], 2, info);
if (status != 0)
return status;

pos += 2;
val = (buffer[0] << 8) | buffer[1];
(*info->fprintf_func) (info->stream, "[0x%x,%s]",
(unsigned) val & 0xffff, reg_name[reg]);
if (indirect)
*indirect = 1;
}

/* n,r with 9 and 16 bit signed constant. */
else if ((buffer[0] & 0x4) == 0)
{
if ((mov_insn) && (!(arch & cpu9s12x)))
{
(*info->fprintf_func) (info->stream, "<invalid op: 0x%x>",
buffer[0] & 0x0ff);
return 0;
}

reg = (buffer[0] >> 3) & 0x03;
status = read_memory (memaddr + pos,
&buffer[1], (buffer[0] & 0x2 ? 2 : 1), info);
if (status != 0)
return status;

if (buffer[0] & 2)
{
val = (((buffer[1] << 8) | buffer[2]) ^ 0x8000) - 0x8000;
pos += 2;
endaddr += 2;
}
else
{
val = buffer[1] - ((buffer[0] & 1) << 8);
pos++;
endaddr++;
}
(*info->fprintf_func) (info->stream, "0x%x,%s",
(unsigned) val & 0xffff, reg_name[reg]);
if (reg == PC_REGNUM)
{
(* info->fprintf_func) (info->stream, " {0x");
(* info->print_address_func) (endaddr + val, info);
(* info->fprintf_func) (info->stream, "}");
}
}
else
{
reg = (buffer[0] >> 3) & 0x03;
switch (buffer[0] & 3)
{
case 0:
(*info->fprintf_func) (info->stream, "A,%s", reg_name[reg]);
break;
case 1:
(*info->fprintf_func) (info->stream, "B,%s", reg_name[reg]);
break;
case 2:
(*info->fprintf_func) (info->stream, "D,%s", reg_name[reg]);
break;
case 3:
default:
(*info->fprintf_func) (info->stream, "[D,%s]", reg_name[reg]);
if (indirect)
*indirect = 1;
break;
}
}

return pos;
}

/* Disassemble one instruction at address 'memaddr'. Returns the number
of bytes used by that instruction. */
static int
print_insn (bfd_vma memaddr, struct disassemble_info* info, int arch)
{
int status;
bfd_byte buffer[4];
unsigned int code;
long format, pos, i;
bfd_vma val;
const struct m68hc11_opcode *opcode;

if (arch & cpuxgate)
{
/* Get two bytes as all XGATE instructions are 16bit. */
status = read_memory (memaddr, buffer, 2, info);
if (status != 0)
return status;

format = 0;
code = (buffer[0] << 8) + buffer[1];

/* Scan the opcode table until we find the opcode
with the corresponding page. */
opcode = m68hc11_opcodes;
for (i = 0; i < m68hc11_num_opcodes; i++, opcode++)
{
if ((opcode->opcode != (code & opcode->xg_mask)) || (opcode->arch != cpuxgate))
continue;
/* We have found the opcode. Extract the operand and print it. */
(*info->fprintf_func) (info->stream, "%s", opcode->name);
format = opcode->format;
if (format & (M68XG_OP_NONE))
{
/* Nothing to print. */
}
else if (format & M68XG_OP_IMM3)
(*info->fprintf_func) (info->stream, " #0x%x", (code >> 8) & 0x7);
else if (format & M68XG_OP_R_R)
(*info->fprintf_func) (info->stream, " R%x, R%x",
(code >> 8) & 0x7, (code >> 5) & 0x7);
else if (format & M68XG_OP_R_R_R)
(*info->fprintf_func) (info->stream, " R%x, R%x, R%x",
(code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7);
else if (format & M68XG_OP_RD_RB_RI)
(*info->fprintf_func) (info->stream, " R%x, (R%x, R%x)",
(code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7);
else if (format & M68XG_OP_RD_RB_RIp)
(*info->fprintf_func) (info->stream, " R%x, (R%x, R%x+)",
(code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7);
else if (format & M68XG_OP_RD_RB_mRI)
(*info->fprintf_func) (info->stream, " R%x, (R%x, -R%x)",
(code >> 8) & 0x7, (code >> 5) & 0x7, (code >> 2) & 0x7);
else if (format & M68XG_OP_R_R_OFFS5)
(*info->fprintf_func) (info->stream, " R%x, (R%x, #0x%x)",
(code >> 8) & 0x7, (code >> 5) & 0x7, code & 0x1f);
else if (format & M68XG_OP_R_IMM8)
(*info->fprintf_func) (info->stream, " R%x, #0x%02x",
(code >> 8) & 0x7, code & 0xff);
else if (format & M68XG_OP_R_IMM4)
(*info->fprintf_func) (info->stream, " R%x, #0x%x",
(code >> 8) & 0x7, (code & 0xf0) >> 4);
else if (format & M68XG_OP_REL9)
{
(*info->fprintf_func) (info->stream, " 0x");
val = buffer[1] - ((buffer[0] & 1) << 8);
(*info->print_address_func) (memaddr + (val << 1) + 2, info);
}
else if (format & M68XG_OP_REL10)
{
(*info->fprintf_func) (info->stream, " 0x");
val = (buffer[0] << 8) | buffer[1];
val = ((val & 0x3ff) ^ 0x200) - 0x200;
(*info->print_address_func) (memaddr + (val << 1) + 2, info);
}
else if ((code & 0x00ff) == 0x00f8)
(*info->fprintf_func) (info->stream, " R%x, CCR", (code >> 8) & 0x7);
else if ((code & 0x00ff) == 0x00f9)
(*info->fprintf_func) (info->stream, " CCR, R%x", (code >> 8) & 0x7);
else if ((code & 0x00ff) == 0x0)
(*info->fprintf_func) (info->stream, " R%x, PC", (code >> 8) & 0x7);
else if (format & M68XG_OP_R)
{
/* Special cases for TFR. */
if ((code & 0xf8ff) == 0x00f8)
(*info->fprintf_func) (info->stream, " R%x, CCR", (code >> 8) & 0x7);
else if ((code & 0xf8ff) == 0x00f9)
(*info->fprintf_func) (info->stream, " CCR, R%x", (code >> 8) & 0x7);
else if ((code & 0xf8ff) == 0x00fa)
(*info->fprintf_func) (info->stream, " R%x, PC", (code >> 8) & 0x7);
else
(*info->fprintf_func) (info->stream, " R%x", (code >> 8) & 0x7);
}
else
/* Opcode not recognized. */
(*info->fprintf_func) (info->stream, "Not yet handled TEST .byte\t0x%04x", code);
return 2;
}

/* Opcode not recognized. */
(*info->fprintf_func) (info->stream, ".byte\t0x%04x", code);
return 2; /* Everything is two bytes. */
}

/* HC11 and HC12. */

/* Get first byte. Only one at a time because we don't know the
size of the insn. */
status = read_memory (memaddr, buffer, 1, info);
if (status != 0)
return status;

format = 0;
code = buffer[0];
pos = 0;

/* Look for page2,3,4 opcodes. */
if (code == M6811_OPCODE_PAGE2)
{
pos++;
format = M6811_OP_PAGE2;
}
else if (code == M6811_OPCODE_PAGE3 && arch == cpu6811)
{
pos++;
format = M6811_OP_PAGE3;
}
else if (code == M6811_OPCODE_PAGE4 && arch == cpu6811)
{
pos++;
format = M6811_OP_PAGE4;
}

/* We are in page2,3,4; get the real opcode. */
if (pos == 1)
{
status = read_memory (memaddr + pos, &buffer[1], 1, info);
if (status != 0)
return status;

code = buffer[1];
}

/* Look first for a 68HC12 alias. All of them are 2-bytes long and
in page 1. There is no operand to print. We read the second byte
only when we have a possible match. */
if ((arch & cpu6812) && format == 0)
{
int must_read = 1;

/* Walk the alias table to find a code1+code2 match. */
for (i = 0; i < m68hc12_num_alias; i++)
{
if (m68hc12_alias[i].code1 == code)
{
if (must_read)
{
status = read_memory (memaddr + pos + 1,
&buffer[1], 1, info);
if (status != 0)
break;

must_read = 1;
}
if (m68hc12_alias[i].code2 == (unsigned char) buffer[1])
{
(*info->fprintf_func) (info->stream, "%s",
m68hc12_alias[i].name);
return 2;
}
}
}
}

pos++;

/* Scan the opcode table until we find the opcode
with the corresponding page. */
opcode = m68hc11_opcodes;
for (i = 0; i < m68hc11_num_opcodes; i++, opcode++)
{
int offset;
int pc_src_offset;
int pc_dst_offset = 0;

if ((opcode->arch & arch) == 0)
continue;
if (opcode->opcode != code)
continue;
if ((opcode->format & OP_PAGE_MASK) != format)
continue;

if (opcode->format & M6812_OP_REG)
{
int j;
int is_jump;

if (opcode->format & M6811_OP_JUMP_REL)
is_jump = 1;
else
is_jump = 0;

status = read_memory (memaddr + pos, &buffer[0], 1, info);
if (status != 0)
{
return status;
}
for (j = 0; i + j < m68hc11_num_opcodes; j++)
{
if ((opcode[j].arch & arch) == 0)
continue;
if (opcode[j].opcode != code)
continue;
if (is_jump)
{
if (!(opcode[j].format & M6811_OP_JUMP_REL))
continue;

if ((opcode[j].format & M6812_OP_IBCC_MARKER)
&& (buffer[0] & 0xc0) != 0x80)
continue;
if ((opcode[j].format & M6812_OP_TBCC_MARKER)
&& (buffer[0] & 0xc0) != 0x40)
continue;
if ((opcode[j].format & M6812_OP_DBCC_MARKER)
&& (buffer[0] & 0xc0) != 0)
continue;
if ((opcode[j].format & M6812_OP_EQ_MARKER)
&& (buffer[0] & 0x20) == 0)
break;
if (!(opcode[j].format & M6812_OP_EQ_MARKER)
&& (buffer[0] & 0x20) != 0)
break;
continue;
}
if (opcode[j].format & M6812_OP_EXG_MARKER && buffer[0] & 0x80)
break;
if ((opcode[j].format & M6812_OP_SEX_MARKER)
&& (((buffer[0] & 0x07) >= 3 && (buffer[0] & 7) <= 7))
&& ((buffer[0] & 0x0f0) <= 0x20))
break;
if ((opcode[j].format & M6812_OP_SEX_MARKER)
&& (arch & cpu9s12x)
&& ((buffer[0] == 0x4d) || (buffer[0] == 0x4e)))
break;
if (opcode[j].format & M6812_OP_TFR_MARKER
&& !(buffer[0] & 0x80))
break;
}
if (i + j < m68hc11_num_opcodes)
opcode = &opcode[j];
}

/* We have found the opcode. Extract the operand and print it. */
(*info->fprintf_func) (info->stream, "%s", opcode->name);

format = opcode->format;
if (format & (M6811_OP_MASK | M6811_OP_BITMASK
| M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16))
{
(*info->fprintf_func) (info->stream, "\t");
}

/* The movb and movw must be handled in a special way...
The source constant 'ii' is not always at the same place.
This is the same for the destination for the post-indexed byte.
The 'offset' is used to do the appropriate correction.

offset offset
for constant for destination
movb 18 OB ii hh ll 0 0
18 08 xb ii 1 -1
18 08 xb ff ii 2 1 9 bit
18 08 xb ee ff ii 3 1 16 bit
18 0C hh ll hh ll 0 0
18 09 xb hh ll 1 -1
18 0D xb hh ll 0 0
18 0A xb xb 0 0

movw 18 03 jj kk hh ll 0 0
18 00 xb jj kk 1 -1
18 04 hh ll hh ll 0 0
18 01 xb hh ll 1 -1
18 05 xb hh ll 0 0
18 02 xb xb 0 0

After the source operand is read, the position 'pos' is incremented
this explains the negative offset for destination.

movb/movw above are the only instructions with this matching
format. */
offset = ((format & M6812_OP_IDX_P2)
&& (format & (M6811_OP_IMM8 | M6811_OP_IMM16 |
M6811_OP_IND16)));

if (offset)
{
/* Check xb to see position of data. */
status = read_memory (memaddr + pos, &buffer[0], 1, info);
if (status != 0)
{
return status;
}

if (((buffer[0] & 0xe0) == 0xe0) && ((buffer[0] & 0x04) == 0))
{
/* 9 or 16 bit. */
if ((buffer[0] & 0x02) == 0)
{
/* 9 bit. */
offset = 2;
}
else
{
/* 16 bit. */
offset = 3;
}
}
}

/* Operand with one more byte: - immediate, offset,
direct-low address. */
if (format &
(M6811_OP_IMM8 | M6811_OP_IX | M6811_OP_IY | M6811_OP_DIRECT))
{
status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
if (status != 0)
return status;

/* This movb/movw is special (see above). */
if (offset < 2)
{
offset = -offset;
pc_dst_offset = 2;
}
else
{
offset = -1;
pc_dst_offset = 5;
}
pos++;

if (format & M6811_OP_IMM8)
{
(*info->fprintf_func) (info->stream, "#0x%x", (int) buffer[0]);
format &= ~M6811_OP_IMM8;
/* Set PC destination offset. */
pc_dst_offset = 1;
}
else if (format & M6811_OP_IX)
{
/* Offsets are in range 0..255, print them unsigned. */
(*info->fprintf_func) (info->stream, "0x%x,x", buffer[0] & 0x0FF);
format &= ~M6811_OP_IX;
}
else if (format & M6811_OP_IY)
{
(*info->fprintf_func) (info->stream, "0x%x,y", buffer[0] & 0x0FF);
format &= ~M6811_OP_IY;
}
else if (format & M6811_OP_DIRECT)
{
(*info->fprintf_func) (info->stream, "*");
if (info->symtab_size > 0) /* Avoid duplicate 0x. */
(*info->fprintf_func) (info->stream, "0x");
(*info->print_address_func) (buffer[0] & 0x0FF, info);
format &= ~M6811_OP_DIRECT;
}
}

#define M6812_DST_MOVE (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)
#define M6812_INDEXED_FLAGS (M6812_OP_IDX|M6812_OP_IDX_1|M6812_OP_IDX_2)
/* Analyze the 68HC12 indexed byte. */
if (format & M6812_INDEXED_FLAGS)
{
int indirect;
bfd_vma endaddr;

endaddr = memaddr + pos + 1;
if (format & M6811_OP_IND16)
endaddr += 2;
pc_src_offset = -1;
pc_dst_offset = 1;
status = print_indexed_operand (memaddr + pos, info, &indirect,
(format & M6812_DST_MOVE),
pc_src_offset, endaddr, arch);
if (status < 0)
return status;

pos += status;

/* The indirect addressing mode of the call instruction does
not need the page code. */
if ((format & M6812_OP_PAGE) && indirect)
format &= ~M6812_OP_PAGE;
}

/* 68HC12 dbcc/ibcc/tbcc operands. */
if ((format & M6812_OP_REG) && (format & M6811_OP_JUMP_REL))
{
status = read_memory (memaddr + pos, &buffer[0], 2, info);
if (status != 0)
return status;

(*info->fprintf_func) (info->stream, "%s,",
reg_src_table[buffer[0] & 0x07]);
val = buffer[1] - ((buffer[0] & 0x10) << 4);

pos += 2;
(*info->fprintf_func) (info->stream, "0x");
(*info->print_address_func) (memaddr + pos + val, info);
format &= ~(M6812_OP_REG | M6811_OP_JUMP_REL);
}
else if (format & (M6812_OP_REG | M6812_OP_REG_2))
{
status = read_memory (memaddr + pos, &buffer[0], 1, info);
if (status != 0)
return status;

pos++;
(*info->fprintf_func) (info->stream, "%s,%s",
reg_src_table[(buffer[0] >> 4) & 7],
reg_dst_table[(buffer[0] & 7)]);
}

if (format & (M6811_OP_IMM16 | M6811_OP_IND16))
{
bfd_vma addr;
unsigned page = 0;

status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
if (status != 0)
return status;

if (format & M6812_OP_IDX_P2)
offset = -2;
else
offset = 0;
pos += 2;

addr = val = (buffer[0] << 8) | buffer[1];
pc_dst_offset = 2;
if (format & M6812_OP_PAGE)
{
status = read_memory (memaddr + pos + offset, buffer, 1, info);
if (status != 0)
return status;

page = buffer[0];
if (addr >= M68HC12_BANK_BASE && addr < 0x0c000)
addr = (val - M68HC12_BANK_BASE + (page << M68HC12_BANK_SHIFT)
+ M68HC12_BANK_VIRT);
}
else if ((arch & cpu6812)
&& addr >= M68HC12_BANK_BASE && addr < 0x0c000)
{
unsigned cur_page;
bfd_vma vaddr;

if (memaddr >= M68HC12_BANK_VIRT)
cur_page = ((memaddr - M68HC12_BANK_VIRT)
>> M68HC12_BANK_SHIFT);
else
cur_page = 0;

vaddr = (addr - M68HC12_BANK_BASE
+ (cur_page << M68HC12_BANK_SHIFT)) + M68HC12_BANK_VIRT;
if (!info->symbol_at_address_func (addr, info)
&& info->symbol_at_address_func (vaddr, info))
addr = vaddr;
}
if (format & M6811_OP_IMM16)
{
format &= ~M6811_OP_IMM16;
(*info->fprintf_func) (info->stream, "#");
}
else
{
format &= ~M6811_OP_IND16;
}

/* Avoid duplicate 0x from core binutils. */
if (info->symtab_size > 0)
(*info->fprintf_func) (info->stream, "0x");

(*info->print_address_func) (addr, info);
if (format & M6812_OP_PAGE)
{
(* info->fprintf_func) (info->stream, " {");
/* Avoid duplicate 0x from core binutils. */
if (info->symtab_size > 0)
(*info->fprintf_func) (info->stream, "0x");
(* info->print_address_func) (val, info);
(* info->fprintf_func) (info->stream, ", 0x%x}", page);
format &= ~M6812_OP_PAGE;
pos += 1;
}
}

if (format & M6812_OP_IDX_P2)
{
(*info->fprintf_func) (info->stream, ", ");
status = print_indexed_operand (memaddr + pos + offset, info,
0, 1, pc_dst_offset,
memaddr + pos + offset + 1, arch);
if (status < 0)
return status;
pos += status;
}

if (format & M6812_OP_IND16_P2)
{
(*info->fprintf_func) (info->stream, ", ");

status = read_memory (memaddr + pos + offset, &buffer[0], 2, info);
if (status != 0)
return status;

pos += 2;

val = (buffer[0] << 8) | buffer[1];
/* Avoid duplicate 0x from core binutils. */
if (info->symtab_size > 0)
(*info->fprintf_func) (info->stream, "0x");
(*info->print_address_func) (val, info);
}

/* M6811_OP_BITMASK and M6811_OP_JUMP_REL must be treated separately
and in that order. The brset/brclr insn have a bitmask and then
a relative branch offset. */
if (format & M6811_OP_BITMASK)
{
status = read_memory (memaddr + pos, &buffer[0], 1, info);
if (status != 0)
return status;

pos++;
(*info->fprintf_func) (info->stream, ", #0x%02x%s",
buffer[0] & 0x0FF,
(format & M6811_OP_JUMP_REL ? ", " : ""));
format &= ~M6811_OP_BITMASK;
}
if (format & M6811_OP_JUMP_REL)
{
status = read_memory (memaddr + pos, &buffer[0], 1, info);
if (status != 0)
return status;

(*info->fprintf_func) (info->stream, "0x");
pos++;
val = (buffer[0] ^ 0x80) - 0x80;
(*info->print_address_func) (memaddr + pos + val, info);
format &= ~M6811_OP_JUMP_REL;
}
else if (format & M6812_OP_JUMP_REL16)
{
status = read_memory (memaddr + pos, &buffer[0], 2, info);
if (status != 0)
return status;

pos += 2;
val = (((buffer[0] << 8) | buffer[1]) ^ 0x8000) - 0x8000;

(*info->fprintf_func) (info->stream, "0x");
(*info->print_address_func) (memaddr + pos + val, info);
format &= ~M6812_OP_JUMP_REL16;
}

if (format & M6812_OP_PAGE)
{
status = read_memory (memaddr + pos + offset, &buffer[0], 1, info);
if (status != 0)
return status;

pos += 1;

val = buffer[0];
(*info->fprintf_func) (info->stream, ", 0x%x", (unsigned) val);
}

#ifdef DEBUG
/* Consistency check. 'format' must be 0, so that we have handled
all formats; and the computed size of the insn must match the
opcode table content. */
if (format & ~(M6811_OP_PAGE4 | M6811_OP_PAGE3 | M6811_OP_PAGE2))
(*info->fprintf_func) (info->stream, "; Error, format: %lx", format);

if (pos != opcode->size)
(*info->fprintf_func) (info->stream, "; Error, size: %ld expect %d",
pos, opcode->size);
#endif
return pos;
}

/* Opcode not recognized. */
if (format == M6811_OP_PAGE2 && arch & cpu6812
&& ((code >= 0x30 && code <= 0x39) || (code >= 0x40)))
(*info->fprintf_func) (info->stream, "trap\t#0x%02x", code & 0x0ff);

else if (format == M6811_OP_PAGE2)
(*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
M6811_OPCODE_PAGE2, code);
else if (format == M6811_OP_PAGE3)
(*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
M6811_OPCODE_PAGE3, code);
else if (format == M6811_OP_PAGE4)
(*info->fprintf_func) (info->stream, ".byte\t0x%02x, 0x%02x",
M6811_OPCODE_PAGE4, code);
else
(*info->fprintf_func) (info->stream, ".byte\t0x%02x", code);

return pos;
}

/* Disassemble one instruction at address 'memaddr'. Returns the number
of bytes used by that instruction. */
int
print_insn_m68hc11 (bfd_vma memaddr, struct disassemble_info* info)
{
return print_insn (memaddr, info, cpu6811);
}

int
print_insn_m68hc12 (bfd_vma memaddr, struct disassemble_info* info)
{
return print_insn (memaddr, info, cpu6812);
}

int
print_insn_m9s12x (bfd_vma memaddr, struct disassemble_info* info)
{
return print_insn (memaddr, info, cpu6812|cpu9s12x);
}

int
print_insn_m9s12xg (bfd_vma memaddr, struct disassemble_info* info)
{
return print_insn (memaddr, info, cpuxgate);
}