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sm83_disassembler.c
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sm83_disassembler.c
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#include <stdio.h>
#include <stdbool.h>
#include "gb.h"
#define GB_read_memory GB_safe_read_memory
typedef void opcode_t(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc);
static void ill(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, ".BYTE $%02x\n", opcode);
(*pc)++;
}
static void nop(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "NOP\n");
(*pc)++;
}
static void stop(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint8_t next = GB_read_memory(gb, (*pc)++);
if (next) {
GB_log(gb, "CORRUPTED STOP (%02x)\n", next);
}
else {
GB_log(gb, "STOP\n");
}
}
static char *register_names[] = {"af", "bc", "de", "hl", "sp"};
static void ld_rr_d16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
uint16_t value;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
value = GB_read_memory(gb, (*pc)++);
value |= GB_read_memory(gb, (*pc)++) << 8;
const char *symbol = GB_debugger_name_for_address(gb, value);
if (symbol) {
GB_log(gb, "LD %s, %s ; =$%04x\n", register_names[register_id], symbol, value);
}
else {
GB_log(gb, "LD %s, $%04x\n", register_names[register_id], value);
}
}
static void ld_drr_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "LD [%s], a\n", register_names[register_id]);
}
static void inc_rr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "INC %s\n", register_names[register_id]);
}
static void inc_hr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
(*pc)++;
register_id = ((opcode >> 4) + 1) & 0x03;
GB_log(gb, "INC %c\n", register_names[register_id][0]);
}
static void dec_hr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
(*pc)++;
register_id = ((opcode >> 4) + 1) & 0x03;
GB_log(gb, "DEC %c\n", register_names[register_id][0]);
}
static void ld_hr_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
(*pc)++;
register_id = ((opcode >> 4) + 1) & 0x03;
GB_log(gb, "LD %c, $%02x\n", register_names[register_id][0], GB_read_memory(gb, (*pc)++));
}
static void rlca(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RLCA\n");
}
static void rla(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RLA\n");
}
static void ld_da16_sp(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint16_t addr;
(*pc)++;
addr = GB_read_memory(gb, (*pc)++);
addr |= GB_read_memory(gb, (*pc)++) << 8;
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "LD [%s], sp ; =$%04x\n", symbol, addr);
}
else {
GB_log(gb, "LD [$%04x], sp\n", addr);
}
}
static void add_hl_rr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
(*pc)++;
register_id = (opcode >> 4) + 1;
GB_log(gb, "ADD hl, %s\n", register_names[register_id]);
}
static void ld_a_drr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "LD a, [%s]\n", register_names[register_id]);
}
static void dec_rr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "DEC %s\n", register_names[register_id]);
}
static void inc_lr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "INC %c\n", register_names[register_id][1]);
}
static void dec_lr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "DEC %c\n", register_names[register_id][1]);
}
static void ld_lr_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = (GB_read_memory(gb, (*pc)++) >> 4) + 1;
GB_log(gb, "LD %c, $%02x\n", register_names[register_id][1], GB_read_memory(gb, (*pc)++));
}
static void rrca(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "RRCA\n");
(*pc)++;
}
static void rra(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "RRA\n");
(*pc)++;
}
static void jr_r8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = *pc + (int8_t) GB_read_memory(gb, (*pc)) + 1;
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_attributed_log(gb, GB_LOG_UNDERLINE, "JR %s ; =$%04x\n", symbol, addr);
}
else {
GB_attributed_log(gb, GB_LOG_UNDERLINE, "JR $%04x\n", addr);
}
(*pc)++;
}
static const char *condition_code(uint8_t opcode)
{
switch ((opcode >> 3) & 0x3) {
case 0:
return "nz";
case 1:
return "z";
case 2:
return "nc";
case 3:
return "c";
}
return NULL;
}
static void jr_cc_r8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = *pc + (int8_t) GB_read_memory(gb, (*pc)) + 1;
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_attributed_log(gb, GB_LOG_DASHED_UNDERLINE, "JR %s, %s ; =$%04x\n", condition_code(opcode), symbol, addr);
}
else {
GB_attributed_log(gb, GB_LOG_DASHED_UNDERLINE, "JR %s, $%04x\n", condition_code(opcode), addr);
}
(*pc)++;
}
static void daa(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "DAA\n");
(*pc)++;
}
static void cpl(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "CPL\n");
(*pc)++;
}
static void scf(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "SCF\n");
(*pc)++;
}
static void ccf(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "CCF\n");
(*pc)++;
}
static void ld_dhli_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "LD [hli], a\n");
(*pc)++;
}
static void ld_dhld_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "LD [hld], a\n");
(*pc)++;
}
static void ld_a_dhli(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "LD a, [hli]\n");
(*pc)++;
}
static void ld_a_dhld(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "LD a, [hld]\n");
(*pc)++;
}
static void inc_dhl(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "INC [hl]\n");
(*pc)++;
}
static void dec_dhl(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
GB_log(gb, "DEC [hl]\n");
(*pc)++;
}
static void ld_dhl_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "LD [hl], $%02x\n", GB_read_memory(gb, (*pc)++));
}
static const char *get_src_name(uint8_t opcode)
{
uint8_t src_register_id;
uint8_t src_low;
src_register_id = ((opcode >> 1) + 1) & 3;
src_low = (opcode & 1);
if (src_register_id == GB_REGISTER_AF) {
return src_low? "a": "[hl]";
}
if (src_low) {
return register_names[src_register_id] + 1;
}
static const char *high_register_names[] = {"a", "b", "d", "h"};
return high_register_names[src_register_id];
}
static const char *get_dst_name(uint8_t opcode)
{
uint8_t dst_register_id;
uint8_t dst_low;
dst_register_id = ((opcode >> 4) + 1) & 3;
dst_low = opcode & 8;
if (dst_register_id == GB_REGISTER_AF) {
return dst_low? "a": "[hl]";
}
if (dst_low) {
return register_names[dst_register_id] + 1;
}
static const char *high_register_names[] = {"a", "b", "d", "h"};
return high_register_names[dst_register_id];
}
static void ld_r_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "LD %s, %s\n", get_dst_name(opcode), get_src_name(opcode));
}
static void add_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "ADD %s\n", get_src_name(opcode));
}
static void adc_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "ADC %s\n", get_src_name(opcode));
}
static void sub_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SUB %s\n", get_src_name(opcode));
}
static void sbc_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SBC %s\n", get_src_name(opcode));
}
static void and_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "AND %s\n", get_src_name(opcode));
}
static void xor_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "XOR %s\n", get_src_name(opcode));
}
static void or_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "OR %s\n", get_src_name(opcode));
}
static void cp_a_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "CP %s\n", get_src_name(opcode));
}
static void halt(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "HALT\n");
}
static void ret_cc(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_attributed_log(gb, GB_LOG_DASHED_UNDERLINE, "RET %s\n", condition_code(opcode));
}
static void pop_rr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = ((GB_read_memory(gb, (*pc)++) >> 4) + 1) & 3;
GB_log(gb, "POP %s\n", register_names[register_id]);
}
static void jp_cc_a16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_attributed_log(gb, GB_LOG_DASHED_UNDERLINE, "JP %s, %s ; =$%04x\n", condition_code(opcode), symbol, addr);
}
else {
GB_attributed_log(gb, GB_LOG_DASHED_UNDERLINE, "JP %s, $%04x\n", condition_code(opcode), addr);
}
(*pc) += 2;
}
static void jp_a16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "JP %s ; =$%04x\n", symbol, addr);
}
else {
GB_log(gb, "JP $%04x\n", addr);
}
(*pc) += 2;
}
static void call_cc_a16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "CALL %s, %s ; =$%04x\n", condition_code(opcode), symbol, addr);
}
else {
GB_log(gb, "CALL %s, $%04x\n", condition_code(opcode), addr);
}
(*pc) += 2;
}
static void push_rr(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t register_id;
register_id = ((GB_read_memory(gb, (*pc)++) >> 4) + 1) & 3;
GB_log(gb, "PUSH %s\n", register_names[register_id]);
}
static void add_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "ADD $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void adc_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "ADC $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void sub_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SUB $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void sbc_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SBC $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void and_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "AND $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void xor_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "XOR $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void or_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "OR $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void cp_a_d8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "CP $%02x\n", GB_read_memory(gb, (*pc)++));
}
static void rst(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RST $%02x\n", opcode ^ 0xC7);
}
static void ret(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_attributed_log(gb, GB_LOG_UNDERLINE, "RET\n");
}
static void reti(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_attributed_log(gb, GB_LOG_UNDERLINE, "RETI\n");
}
static void call_a16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "CALL %s ; =$%04x\n", symbol, addr);
}
else {
GB_log(gb, "CALL $%04x\n", addr);
}
(*pc) += 2;
}
static void ld_da8_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint8_t addr = GB_read_memory(gb, (*pc)++);
const char *symbol = GB_debugger_name_for_address(gb, 0xFF00 + addr);
if (symbol) {
GB_log(gb, "LDH [%s & $FF], a ; =$%02x\n", symbol, addr);
}
else {
GB_log(gb, "LDH [$%02x], a\n", addr);
}
}
static void ld_a_da8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint8_t addr = GB_read_memory(gb, (*pc)++);
const char *symbol = GB_debugger_name_for_address(gb, 0xFF00 + addr);
if (symbol) {
GB_log(gb, "LDH a, [%s & $FF] ; =$%02x\n", symbol, addr);
}
else {
GB_log(gb, "LDH a, [$%02x]\n", addr);
}
}
static void ld_dc_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "LDH [c], a\n");
}
static void ld_a_dc(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "LDH a, [c]\n");
}
static void add_sp_r8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
int8_t temp = GB_read_memory(gb, (*pc)++);
GB_log(gb, "ADD SP, %s$%02x\n", temp < 0? "-" : "", temp < 0? -temp : temp);
}
static void jp_hl(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "JP hl\n");
}
static void ld_da16_a(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "LD [%s], a ; =$%04x\n", symbol, addr);
}
else {
GB_log(gb, "LD [$%04x], a\n", addr);
}
(*pc) += 2;
}
static void ld_a_da16(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
uint16_t addr = GB_read_memory(gb, *pc) | (GB_read_memory(gb, *pc + 1) << 8);
const char *symbol = GB_debugger_name_for_address(gb, addr);
if (symbol) {
GB_log(gb, "LD a, [%s] ; =$%04x\n", symbol, addr);
}
else {
GB_log(gb, "LD a, [$%04x]\n", addr);
}
(*pc) += 2;
}
static void di(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "DI\n");
}
static void ei(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "EI\n");
}
static void ld_hl_sp_r8(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
int8_t temp = GB_read_memory(gb, (*pc)++);
GB_log(gb, "LD hl, sp, %s$%02x\n", temp < 0? "-" : "", temp < 0? -temp : temp);
}
static void ld_sp_hl(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "LD sp, hl\n");
}
static void rlc_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RLC %s\n", get_src_name(opcode));
}
static void rrc_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RRC %s\n", get_src_name(opcode));
}
static void rl_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RL %s\n", get_src_name(opcode));
}
static void rr_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "RR %s\n", get_src_name(opcode));
}
static void sla_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SLA %s\n", get_src_name(opcode));
}
static void sra_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SRA %s\n", get_src_name(opcode));
}
static void srl_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SRL %s\n", get_src_name(opcode));
}
static void swap_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
(*pc)++;
GB_log(gb, "SWAP %s\n", get_src_name(opcode));
}
static void bit_r(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
uint8_t bit;
(*pc)++;
bit = ((opcode >> 3) & 7);
if ((opcode & 0xC0) == 0x40) { /* Bit */
GB_log(gb, "BIT %s, %d\n", get_src_name(opcode), bit);
}
else if ((opcode & 0xC0) == 0x80) { /* res */
GB_log(gb, "RES %s, %d\n", get_src_name(opcode), bit);
}
else if ((opcode & 0xC0) == 0xC0) { /* set */
GB_log(gb, "SET %s, %d\n", get_src_name(opcode), bit);
}
}
static void cb_prefix(GB_gameboy_t *gb, uint8_t opcode, uint16_t *pc)
{
opcode = GB_read_memory(gb, ++*pc);
switch (opcode >> 3) {
case 0:
rlc_r(gb, opcode, pc);
break;
case 1:
rrc_r(gb, opcode, pc);
break;
case 2:
rl_r(gb, opcode, pc);
break;
case 3:
rr_r(gb, opcode, pc);
break;
case 4:
sla_r(gb, opcode, pc);
break;
case 5:
sra_r(gb, opcode, pc);
break;
case 6:
swap_r(gb, opcode, pc);
break;
case 7:
srl_r(gb, opcode, pc);
break;
default:
bit_r(gb, opcode, pc);
break;
}
}
static opcode_t *opcodes[256] = {
/* X0 X1 X2 X3 X4 X5 X6 X7 */
/* X8 X9 Xa Xb Xc Xd Xe Xf */
nop, ld_rr_d16, ld_drr_a, inc_rr, inc_hr, dec_hr, ld_hr_d8, rlca, /* 0X */
ld_da16_sp, add_hl_rr, ld_a_drr, dec_rr, inc_lr, dec_lr, ld_lr_d8, rrca,
stop, ld_rr_d16, ld_drr_a, inc_rr, inc_hr, dec_hr, ld_hr_d8, rla, /* 1X */
jr_r8, add_hl_rr, ld_a_drr, dec_rr, inc_lr, dec_lr, ld_lr_d8, rra,
jr_cc_r8, ld_rr_d16, ld_dhli_a, inc_rr, inc_hr, dec_hr, ld_hr_d8, daa, /* 2X */
jr_cc_r8, add_hl_rr, ld_a_dhli, dec_rr, inc_lr, dec_lr, ld_lr_d8, cpl,
jr_cc_r8, ld_rr_d16, ld_dhld_a, inc_rr, inc_dhl, dec_dhl, ld_dhl_d8, scf, /* 3X */
jr_cc_r8, add_hl_rr, ld_a_dhld, dec_rr, inc_hr, dec_hr, ld_hr_d8, ccf,
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, /* 4X */
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r,
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, /* 5X */
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r,
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, /* 6X */
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r,
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, halt, ld_r_r, /* 7X */
ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r, ld_r_r,
add_a_r, add_a_r, add_a_r, add_a_r, add_a_r, add_a_r, add_a_r, add_a_r, /* 8X */
adc_a_r, adc_a_r, adc_a_r, adc_a_r, adc_a_r, adc_a_r, adc_a_r, adc_a_r,
sub_a_r, sub_a_r, sub_a_r, sub_a_r, sub_a_r, sub_a_r, sub_a_r, sub_a_r, /* 9X */
sbc_a_r, sbc_a_r, sbc_a_r, sbc_a_r, sbc_a_r, sbc_a_r, sbc_a_r, sbc_a_r,
and_a_r, and_a_r, and_a_r, and_a_r, and_a_r, and_a_r, and_a_r, and_a_r, /* aX */
xor_a_r, xor_a_r, xor_a_r, xor_a_r, xor_a_r, xor_a_r, xor_a_r, xor_a_r,
or_a_r, or_a_r, or_a_r, or_a_r, or_a_r, or_a_r, or_a_r, or_a_r, /* bX */
cp_a_r, cp_a_r, cp_a_r, cp_a_r, cp_a_r, cp_a_r, cp_a_r, cp_a_r,
ret_cc, pop_rr, jp_cc_a16, jp_a16, call_cc_a16,push_rr, add_a_d8, rst, /* cX */
ret_cc, ret, jp_cc_a16, cb_prefix, call_cc_a16,call_a16, adc_a_d8, rst,
ret_cc, pop_rr, jp_cc_a16, ill, call_cc_a16,push_rr, sub_a_d8, rst, /* dX */
ret_cc, reti, jp_cc_a16, ill, call_cc_a16,ill, sbc_a_d8, rst,
ld_da8_a, pop_rr, ld_dc_a, ill, ill, push_rr, and_a_d8, rst, /* eX */
add_sp_r8, jp_hl, ld_da16_a, ill, ill, ill, xor_a_d8, rst,
ld_a_da8, pop_rr, ld_a_dc, di, ill, push_rr, or_a_d8, rst, /* fX */
ld_hl_sp_r8,ld_sp_hl, ld_a_da16, ei, ill, ill, cp_a_d8, rst,
};
void GB_cpu_disassemble(GB_gameboy_t *gb, uint16_t pc, uint16_t count)
{
const GB_bank_symbol_t *function_symbol = GB_debugger_find_symbol(gb, pc);
if (function_symbol && pc - function_symbol->addr > 0x1000) {
function_symbol = NULL;
}
if (function_symbol && pc != function_symbol->addr) {
GB_log(gb, "%s:\n", function_symbol->name);
}
uint16_t current_function = function_symbol? function_symbol->addr : 0;
while (count--) {
function_symbol = GB_debugger_find_symbol(gb, pc);
if (function_symbol && function_symbol->addr == pc) {
if (current_function != function_symbol->addr) {
GB_log(gb, "\n");
}
GB_log(gb, "%s:\n", function_symbol->name);
}
if (function_symbol) {
GB_log(gb, "%s%04x <+%03x>: ", pc == gb->pc? " ->": " ", pc, pc - function_symbol->addr);
}
else {
GB_log(gb, "%s%04x: ", pc == gb->pc? " ->": " ", pc);
}
uint8_t opcode = GB_read_memory(gb, pc);
opcodes[opcode](gb, opcode, &pc);
}
}