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Gambatte: Always update half carry flag

This commit is contained in:
alyosha-tas 2017-08-15 19:48:25 -04:00 committed by GitHub
parent 36a84bd0dd
commit fbbaa2bc59
1 changed files with 13 additions and 0 deletions
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13
libgambatte/src/cpu.cpp
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@ -298,6 +298,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = u8; \
ZF = CF = A + HF2; \
A = ZF & 0xFF; \
calcHF(HF1, HF2); \
} while (0)
//adc a,r (4 cycles):
@ -308,6 +309,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = (CF & 0x100) | (u8); \
ZF = CF = (CF >> 8 & 1) + (u8) + A; \
A = ZF & 0xFF; \
calcHF(HF1, HF2); \
} while (0)
//sub a,r (4 cycles):
@ -319,6 +321,7 @@ void CPU::loadState(const SaveState &state) {
ZF = CF = A - HF2; \
A = ZF & 0xFF; \
HF2 |= 0x400; \
calcHF(HF1, HF2); \
} while (0)
//sbc a,r (4 cycles):
@ -329,6 +332,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = 0x400 | (CF & 0x100) | (u8); \
ZF = CF = A - ((CF >> 8) & 1) - (u8); \
A = ZF & 0xFF; \
calcHF(HF1, HF2); \
} while (0)
//and a,r (4 cycles):
@ -367,6 +371,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = u8; \
ZF = CF = A - HF2; \
HF2 |= 0x400; \
calcHF(HF1, HF2); \
} while (0)
//inc r (4 cycles):
@ -375,6 +380,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = (r) | 0x800; \
ZF = (r) + 1; \
(r) = ZF & 0xFF; \
calcHF(HF1, HF2); \
} while (0)
//dec r (4 cycles):
@ -383,6 +389,7 @@ void CPU::loadState(const SaveState &state) {
HF2 = (r) | 0xC00; \
ZF = (r) - 1; \
(r) = ZF & 0xFF; \
calcHF(HF1, HF2); \
} while (0)
//16-BIT ARITHMETIC
@ -405,6 +412,7 @@ void CPU::loadState(const SaveState &state) {
CF = H + (CF >> 8) + (rh); \
H = CF & 0xFF; \
cycleCounter += 4; \
calcHF(HF1, HF2); \
} while (0)
//inc rr (8 cycles):
@ -436,6 +444,7 @@ void CPU::loadState(const SaveState &state) {
ZF = 1; \
cycleCounter += 4; \
(sumout) = sp_plus_n_var_sum & 0xFFFF; \
calcHF(HF1, HF2); \
} while (0)
//JUMPS:
@ -877,6 +886,7 @@ void CPU::process(const unsigned long cycles) {
ZF = HF2 + 1;
WRITE(addr, ZF & 0xFF);
HF2 |= 0x800;
calcHF(HF1, HF2);
}
break;
@ -890,6 +900,7 @@ void CPU::process(const unsigned long cycles) {
ZF = HF2 - 1;
WRITE(addr, ZF & 0xFF);
HF2 |= 0xC00;
calcHF(HF1, HF2);
}
break;
@ -932,6 +943,7 @@ void CPU::process(const unsigned long cycles) {
CF += H;
H = CF & 0xFF;
cycleCounter += 4;
calcHF(HF1, HF2);
break;
//ldd a,(hl) (8 cycles):
@ -1428,6 +1440,7 @@ void CPU::process(const unsigned long cycles) {
case 0xBF:
CF = ZF = 0;
HF2 = 0x400;
calcHF(HF1, HF2); \
break;
//ret nz (20;8 cycles):