ShuriZma
/
bsnes
mirror of https://github.com/bsnes-emu/bsnes.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fixed CB [hl] opcodes timings

This commit is contained in:
Lior Halphon 2018-03-23 12:35:37 +03:00
parent 18e32d1755
commit 3e5e17d1a3
1 changed files with 24 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
Core/z80_cpu.c
View File

@ -486,7 +486,7 @@ static void ld_dhl_d8(GB_gameboy_t *gb, uint8_t opcode)
GB_advance_cycles(gb, 5);
}
uint8_t get_src_value(GB_gameboy_t *gb, uint8_t opcode)
uint8_t get_src_value(GB_gameboy_t *gb, uint8_t opcode, uint8_t cycles_after_read)
{
uint8_t src_register_id;
uint8_t src_low;
@ -497,7 +497,7 @@ uint8_t get_src_value(GB_gameboy_t *gb, uint8_t opcode)
return gb->registers[GB_REGISTER_AF] >> 8;
}
uint8_t ret = GB_read_memory(gb, gb->registers[GB_REGISTER_HL]);
GB_advance_cycles(gb, 4);
GB_advance_cycles(gb, cycles_after_read);
return ret;
}
if (src_low) {
@ -519,9 +519,9 @@ static void set_src_value(GB_gameboy_t *gb, uint8_t opcode, uint8_t value)
gb->registers[GB_REGISTER_AF] |= value << 8;
}
else {
GB_advance_cycles(gb, 3);
GB_write_memory(gb, gb->registers[GB_REGISTER_HL], value);
GB_advance_cycles(gb, 1);
GB_write_memory(gb, gb->registers[GB_REGISTER_HL], value);
GB_advance_cycles(gb, 4);
}
}
else {
@ -578,7 +578,7 @@ static void add_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] = (a + value) << 8;
if ((uint8_t)(a + value) == 0) {
@ -596,7 +596,7 @@ static void adc_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a, carry;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
carry = (gb->registers[GB_REGISTER_AF] & GB_CARRY_FLAG) != 0;
gb->registers[GB_REGISTER_AF] = (a + value + carry) << 8;
@ -616,7 +616,7 @@ static void sub_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] = ((a - value) << 8) | GB_SUBSTRACT_FLAG;
if (a == value) {
@ -634,7 +634,7 @@ static void sbc_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a, carry;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
carry = (gb->registers[GB_REGISTER_AF] & GB_CARRY_FLAG) != 0;
gb->registers[GB_REGISTER_AF] = ((a - value - carry) << 8) | GB_SUBSTRACT_FLAG;
@ -654,7 +654,7 @@ static void and_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] = ((a & value) << 8) | GB_HALF_CARRY_FLAG;
if ((a & value) == 0) {
@ -666,7 +666,7 @@ static void xor_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] = (a ^ value) << 8;
if ((a ^ value) == 0) {
@ -678,7 +678,7 @@ static void or_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] = (a | value) << 8;
if ((a | value) == 0) {
@ -690,7 +690,7 @@ static void cp_a_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value, a;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 4);
a = gb->registers[GB_REGISTER_AF] >> 8;
gb->registers[GB_REGISTER_AF] &= 0xFF00;
gb->registers[GB_REGISTER_AF] |= GB_SUBSTRACT_FLAG;
@ -1126,7 +1126,7 @@ static void rlc_r(GB_gameboy_t *gb, uint8_t opcode)
bool carry;
uint8_t value;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
carry = (value & 0x80) != 0;
gb->registers[GB_REGISTER_AF] &= 0xFF00;
set_src_value(gb, opcode, (value << 1) | carry);
@ -1143,7 +1143,7 @@ static void rrc_r(GB_gameboy_t *gb, uint8_t opcode)
bool carry;
uint8_t value;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
carry = (value & 0x01) != 0;
gb->registers[GB_REGISTER_AF] &= 0xFF00;
value = (value >> 1) | (carry << 7);
@ -1162,7 +1162,7 @@ static void rl_r(GB_gameboy_t *gb, uint8_t opcode)
uint8_t value;
bool bit7;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
carry = (gb->registers[GB_REGISTER_AF] & GB_CARRY_FLAG) != 0;
bit7 = (value & 0x80) != 0;
@ -1184,7 +1184,7 @@ static void rr_r(GB_gameboy_t *gb, uint8_t opcode)
bool bit1;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
carry = (gb->registers[GB_REGISTER_AF] & GB_CARRY_FLAG) != 0;
bit1 = (value & 0x1) != 0;
@ -1204,7 +1204,7 @@ static void sla_r(GB_gameboy_t *gb, uint8_t opcode)
uint8_t value;
bool carry;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
carry = (value & 0x80) != 0;
gb->registers[GB_REGISTER_AF] &= 0xFF00;
set_src_value(gb, opcode, (value << 1));
@ -1220,8 +1220,8 @@ static void sra_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t bit7;
uint8_t value;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
GB_advance_cycles(gb, 3);
value = get_src_value(gb, opcode, 4);
bit7 = value & 0x80;
gb->registers[GB_REGISTER_AF] &= 0xFF00;
if (value & 1) {
@ -1237,8 +1237,8 @@ static void sra_r(GB_gameboy_t *gb, uint8_t opcode)
static void srl_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
GB_advance_cycles(gb, 3);
value = get_src_value(gb, opcode, 4);
gb->registers[GB_REGISTER_AF] &= 0xFF00;
set_src_value(gb, opcode, (value >> 1));
if (value & 1) {
@ -1252,8 +1252,8 @@ static void srl_r(GB_gameboy_t *gb, uint8_t opcode)
static void swap_r(GB_gameboy_t *gb, uint8_t opcode)
{
uint8_t value;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
GB_advance_cycles(gb, 3);
value = get_src_value(gb, opcode, 4);
gb->registers[GB_REGISTER_AF] &= 0xFF00;
set_src_value(gb, opcode, (value >> 4) | (value << 4));
if (!value) {
@ -1266,7 +1266,7 @@ static void bit_r(GB_gameboy_t *gb, uint8_t opcode)
uint8_t value;
uint8_t bit;
GB_advance_cycles(gb, 4);
value = get_src_value(gb, opcode);
value = get_src_value(gb, opcode, 3);
bit = 1 << ((opcode >> 3) & 7);
if ((opcode & 0xC0) == 0x40) { /* Bit */
gb->registers[GB_REGISTER_AF] &= 0xFF00 | GB_CARRY_FLAG;