mirror of
https://github.com/autc04/Retro68.git
synced 2024-09-09 12:54:40 +00:00
262 lines
7.3 KiB
C
262 lines
7.3 KiB
C
/* Disassemble SPU instructions
|
|
|
|
Copyright 2006, 2007, 2012 Free Software Foundation, Inc.
|
|
|
|
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 file; see the file COPYING. If not, write to the
|
|
Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include "sysdep.h"
|
|
#include <stdio.h>
|
|
#include "dis-asm.h"
|
|
#include "opcode/spu.h"
|
|
|
|
/* This file provides a disassembler function which uses
|
|
the disassembler interface defined in dis-asm.h. */
|
|
|
|
extern const struct spu_opcode spu_opcodes[];
|
|
extern const int spu_num_opcodes;
|
|
|
|
static const struct spu_opcode *spu_disassemble_table[(1<<11)];
|
|
|
|
static void
|
|
init_spu_disassemble (void)
|
|
{
|
|
int i;
|
|
|
|
/* If two instructions have the same opcode then we prefer the first
|
|
* one. In most cases it is just an alternate mnemonic. */
|
|
for (i = 0; i < spu_num_opcodes; i++)
|
|
{
|
|
int o = spu_opcodes[i].opcode;
|
|
if (o >= (1 << 11))
|
|
abort ();
|
|
if (spu_disassemble_table[o] == 0)
|
|
spu_disassemble_table[o] = &spu_opcodes[i];
|
|
}
|
|
}
|
|
|
|
/* Determine the instruction from the 10 least significant bits. */
|
|
static const struct spu_opcode *
|
|
get_index_for_opcode (unsigned int insn)
|
|
{
|
|
const struct spu_opcode *op_index;
|
|
unsigned int opcode = insn >> (32-11);
|
|
|
|
/* Init the table. This assumes that element 0/opcode 0 (currently
|
|
* NOP) is always used */
|
|
if (spu_disassemble_table[0] == 0)
|
|
init_spu_disassemble ();
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x780]) != 0
|
|
&& op_index->insn_type == RRR)
|
|
return op_index;
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x7f0]) != 0
|
|
&& (op_index->insn_type == RI18 || op_index->insn_type == LBT))
|
|
return op_index;
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x7f8]) != 0
|
|
&& op_index->insn_type == RI10)
|
|
return op_index;
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x7fc]) != 0
|
|
&& (op_index->insn_type == RI16))
|
|
return op_index;
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x7fe]) != 0
|
|
&& (op_index->insn_type == RI8))
|
|
return op_index;
|
|
|
|
if ((op_index = spu_disassemble_table[opcode & 0x7ff]) != 0)
|
|
return op_index;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Print a Spu instruction. */
|
|
|
|
int
|
|
print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
|
|
{
|
|
bfd_byte buffer[4];
|
|
int value;
|
|
int hex_value;
|
|
int status;
|
|
unsigned int insn;
|
|
const struct spu_opcode *op_index;
|
|
enum spu_insns tag;
|
|
|
|
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);
|
|
|
|
op_index = get_index_for_opcode (insn);
|
|
|
|
if (op_index == 0)
|
|
{
|
|
(*info->fprintf_func) (info->stream, ".long 0x%x", insn);
|
|
}
|
|
else
|
|
{
|
|
int i;
|
|
int paren = 0;
|
|
tag = (enum spu_insns)(op_index - spu_opcodes);
|
|
(*info->fprintf_func) (info->stream, "%s", op_index->mnemonic);
|
|
if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
|
|
|| tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
|
|
|| tag == M_SYNC || tag == M_HBR)
|
|
{
|
|
int fb = (insn >> (32-18)) & 0x7f;
|
|
if (fb & 0x40)
|
|
(*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p");
|
|
if (fb & 0x20)
|
|
(*info->fprintf_func) (info->stream, "d");
|
|
if (fb & 0x10)
|
|
(*info->fprintf_func) (info->stream, "e");
|
|
}
|
|
if (op_index->arg[0] != 0)
|
|
(*info->fprintf_func) (info->stream, "\t");
|
|
hex_value = 0;
|
|
for (i = 1; i <= op_index->arg[0]; i++)
|
|
{
|
|
int arg = op_index->arg[i];
|
|
if (arg != A_P && !paren && i > 1)
|
|
(*info->fprintf_func) (info->stream, ",");
|
|
|
|
switch (arg)
|
|
{
|
|
case A_T:
|
|
(*info->fprintf_func) (info->stream, "$%d",
|
|
DECODE_INSN_RT (insn));
|
|
break;
|
|
case A_A:
|
|
(*info->fprintf_func) (info->stream, "$%d",
|
|
DECODE_INSN_RA (insn));
|
|
break;
|
|
case A_B:
|
|
(*info->fprintf_func) (info->stream, "$%d",
|
|
DECODE_INSN_RB (insn));
|
|
break;
|
|
case A_C:
|
|
(*info->fprintf_func) (info->stream, "$%d",
|
|
DECODE_INSN_RC (insn));
|
|
break;
|
|
case A_S:
|
|
(*info->fprintf_func) (info->stream, "$sp%d",
|
|
DECODE_INSN_RA (insn));
|
|
break;
|
|
case A_H:
|
|
(*info->fprintf_func) (info->stream, "$ch%d",
|
|
DECODE_INSN_RA (insn));
|
|
break;
|
|
case A_P:
|
|
paren++;
|
|
(*info->fprintf_func) (info->stream, "(");
|
|
break;
|
|
case A_U7A:
|
|
(*info->fprintf_func) (info->stream, "%d",
|
|
173 - DECODE_INSN_U8 (insn));
|
|
break;
|
|
case A_U7B:
|
|
(*info->fprintf_func) (info->stream, "%d",
|
|
155 - DECODE_INSN_U8 (insn));
|
|
break;
|
|
case A_S3:
|
|
case A_S6:
|
|
case A_S7:
|
|
case A_S7N:
|
|
case A_U3:
|
|
case A_U5:
|
|
case A_U6:
|
|
case A_U7:
|
|
hex_value = DECODE_INSN_I7 (insn);
|
|
(*info->fprintf_func) (info->stream, "%d", hex_value);
|
|
break;
|
|
case A_S11:
|
|
(*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4,
|
|
info);
|
|
break;
|
|
case A_S11I:
|
|
(*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4,
|
|
info);
|
|
break;
|
|
case A_S10:
|
|
case A_S10B:
|
|
hex_value = DECODE_INSN_I10 (insn);
|
|
(*info->fprintf_func) (info->stream, "%d", hex_value);
|
|
break;
|
|
case A_S14:
|
|
hex_value = DECODE_INSN_I10 (insn) * 16;
|
|
(*info->fprintf_func) (info->stream, "%d", hex_value);
|
|
break;
|
|
case A_S16:
|
|
hex_value = DECODE_INSN_I16 (insn);
|
|
(*info->fprintf_func) (info->stream, "%d", hex_value);
|
|
break;
|
|
case A_X16:
|
|
hex_value = DECODE_INSN_U16 (insn);
|
|
(*info->fprintf_func) (info->stream, "%u", hex_value);
|
|
break;
|
|
case A_R18:
|
|
value = DECODE_INSN_I16 (insn) * 4;
|
|
if (value == 0)
|
|
(*info->fprintf_func) (info->stream, "%d", value);
|
|
else
|
|
{
|
|
hex_value = memaddr + value;
|
|
(*info->print_address_func) (hex_value & 0x3ffff, info);
|
|
}
|
|
break;
|
|
case A_S18:
|
|
value = DECODE_INSN_U16 (insn) * 4;
|
|
if (value == 0)
|
|
(*info->fprintf_func) (info->stream, "%d", value);
|
|
else
|
|
(*info->print_address_func) (value, info);
|
|
break;
|
|
case A_U18:
|
|
value = DECODE_INSN_U18 (insn);
|
|
if (value == 0 || !(*info->symbol_at_address_func)(0, info))
|
|
{
|
|
hex_value = value;
|
|
(*info->fprintf_func) (info->stream, "%u", value);
|
|
}
|
|
else
|
|
(*info->print_address_func) (value, info);
|
|
break;
|
|
case A_U14:
|
|
hex_value = DECODE_INSN_U14 (insn);
|
|
(*info->fprintf_func) (info->stream, "%u", hex_value);
|
|
break;
|
|
}
|
|
if (arg != A_P && paren)
|
|
{
|
|
(*info->fprintf_func) (info->stream, ")");
|
|
paren--;
|
|
}
|
|
}
|
|
if (hex_value > 16)
|
|
(*info->fprintf_func) (info->stream, "\t# %x", hex_value);
|
|
}
|
|
return 4;
|
|
}
|