mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
237 lines
5.4 KiB
237 lines
5.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* Disassemble SPU instructions |
|
|
|
Copyright 2006 Free Software Foundation, Inc. |
|
|
|
This file is part of GDB, GAS, and the GNU binutils. |
|
|
|
*/ |
|
|
|
#include <linux/string.h> |
|
#include "nonstdio.h" |
|
#include "ansidecl.h" |
|
#include "spu.h" |
|
#include "dis-asm.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; |
|
|
|
#define SPU_DISASM_TBL_SIZE (1 << 11) |
|
static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE]; |
|
|
|
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 >= SPU_DISASM_TBL_SIZE) |
|
continue; /* 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 *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 ((index = spu_disassemble_table[opcode & 0x780]) != 0 |
|
&& index->insn_type == RRR) |
|
return index; |
|
|
|
if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0 |
|
&& (index->insn_type == RI18 || index->insn_type == LBT)) |
|
return index; |
|
|
|
if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0 |
|
&& index->insn_type == RI10) |
|
return index; |
|
|
|
if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0 |
|
&& (index->insn_type == RI16)) |
|
return index; |
|
|
|
if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0 |
|
&& (index->insn_type == RI8)) |
|
return index; |
|
|
|
if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0) |
|
return index; |
|
|
|
return NULL; |
|
} |
|
|
|
/* Print a Spu instruction. */ |
|
|
|
int |
|
print_insn_spu (unsigned long insn, unsigned long memaddr) |
|
{ |
|
int value; |
|
int hex_value; |
|
const struct spu_opcode *index; |
|
enum spu_insns tag; |
|
|
|
index = get_index_for_opcode (insn); |
|
|
|
if (index == 0) |
|
{ |
|
printf(".long 0x%lx", insn); |
|
} |
|
else |
|
{ |
|
int i; |
|
int paren = 0; |
|
tag = (enum spu_insns)(index - spu_opcodes); |
|
printf("%s", 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) |
|
printf(tag == M_SYNC ? "c" : "p"); |
|
if (fb & 0x20) |
|
printf("d"); |
|
if (fb & 0x10) |
|
printf("e"); |
|
} |
|
if (index->arg[0] != 0) |
|
printf("\t"); |
|
hex_value = 0; |
|
for (i = 1; i <= index->arg[0]; i++) |
|
{ |
|
int arg = index->arg[i]; |
|
if (arg != A_P && !paren && i > 1) |
|
printf(","); |
|
|
|
switch (arg) |
|
{ |
|
case A_T: |
|
printf("$%lu", |
|
DECODE_INSN_RT (insn)); |
|
break; |
|
case A_A: |
|
printf("$%lu", |
|
DECODE_INSN_RA (insn)); |
|
break; |
|
case A_B: |
|
printf("$%lu", |
|
DECODE_INSN_RB (insn)); |
|
break; |
|
case A_C: |
|
printf("$%lu", |
|
DECODE_INSN_RC (insn)); |
|
break; |
|
case A_S: |
|
printf("$sp%lu", |
|
DECODE_INSN_RA (insn)); |
|
break; |
|
case A_H: |
|
printf("$ch%lu", |
|
DECODE_INSN_RA (insn)); |
|
break; |
|
case A_P: |
|
paren++; |
|
printf("("); |
|
break; |
|
case A_U7A: |
|
printf("%lu", |
|
173 - DECODE_INSN_U8 (insn)); |
|
break; |
|
case A_U7B: |
|
printf("%lu", |
|
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); |
|
printf("%d", hex_value); |
|
break; |
|
case A_S11: |
|
print_address(memaddr + DECODE_INSN_I9a (insn) * 4); |
|
break; |
|
case A_S11I: |
|
print_address(memaddr + DECODE_INSN_I9b (insn) * 4); |
|
break; |
|
case A_S10: |
|
case A_S10B: |
|
hex_value = DECODE_INSN_I10 (insn); |
|
printf("%d", hex_value); |
|
break; |
|
case A_S14: |
|
hex_value = DECODE_INSN_I10 (insn) * 16; |
|
printf("%d", hex_value); |
|
break; |
|
case A_S16: |
|
hex_value = DECODE_INSN_I16 (insn); |
|
printf("%d", hex_value); |
|
break; |
|
case A_X16: |
|
hex_value = DECODE_INSN_U16 (insn); |
|
printf("%u", hex_value); |
|
break; |
|
case A_R18: |
|
value = DECODE_INSN_I16 (insn) * 4; |
|
if (value == 0) |
|
printf("%d", value); |
|
else |
|
{ |
|
hex_value = memaddr + value; |
|
print_address(hex_value & 0x3ffff); |
|
} |
|
break; |
|
case A_S18: |
|
value = DECODE_INSN_U16 (insn) * 4; |
|
if (value == 0) |
|
printf("%d", value); |
|
else |
|
print_address(value); |
|
break; |
|
case A_U18: |
|
value = DECODE_INSN_U18 (insn); |
|
if (value == 0 || 1) |
|
{ |
|
hex_value = value; |
|
printf("%u", value); |
|
} |
|
else |
|
print_address(value); |
|
break; |
|
case A_U14: |
|
hex_value = DECODE_INSN_U14 (insn); |
|
printf("%u", hex_value); |
|
break; |
|
} |
|
if (arg != A_P && paren) |
|
{ |
|
printf(")"); |
|
paren--; |
|
} |
|
} |
|
if (hex_value > 16) |
|
printf("\t# %x", hex_value); |
|
} |
|
return 4; |
|
}
|
|
|