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binutils-gdb/opcodes/spu-dis.c

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/* Disassemble SPU instructions
Copyright (C) 2006-2021 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 "disassemble.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;
}
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