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Small correction to GB SP instructions passes a little more of the Blargg tests.

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Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
This commit is contained in:
Adrian.Conlon 2017-08-25 10:33:22 +01:00
parent ae4106ce5a
commit 246e6431ab
2 changed files with 12 additions and 10 deletions
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4
LR35902/fusetest_LR35902/fuse-tests/tests.expected
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@ -4949,7 +4949,7 @@ f8_1
0 MC 0000 0 MC 0000
4 MR 0000 f8 4 MR 0000 f8
4 MC 0001 4 MC 0001
0010 0000 0000 0000 fffe 0002 0030 0000 0000 0000 fffe 0002
0 5 0 5
@ -4957,7 +4957,7 @@ f8_2
0 MC 0000 0 MC 0000
4 MR 0000 f8 4 MR 0000 f8
4 MC 0001 4 MC 0001
0000 0000 0000 0fff 1000 0002 0010 0000 0000 0fff 1000 0002
0 5 0 5

18
LR35902/src/LR35902.cpp
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@ -686,13 +686,14 @@ void EightBit::LR35902::executeOther(int x, int y, int z, int p, int q) {
cycles += 3; cycles += 3;
break; break;
case 5: { // GB: ADD SP,dd case 5: { // GB: ADD SP,dd
auto before = SP(); auto before = SP().word;
auto value = fetchByte(); auto value = fetchByte();
auto result = SP().word + (int8_t)value; auto result = before + (int8_t)value;
SP().word = result; SP().word = result;
auto carried = before ^ value ^ result;
clearFlag(f, ZF | NF); clearFlag(f, ZF | NF);
setFlag(f, CF, result & Bit16); setFlag(f, CF, carried & 0x100);
adjustHalfCarryAdd(f, before.high, value, SP().high); setFlag(f, HC, carried & 0x10);
} }
cycles += 4; cycles += 4;
break; break;
@ -701,13 +702,14 @@ void EightBit::LR35902::executeOther(int x, int y, int z, int p, int q) {
cycles += 3; cycles += 3;
break; break;
case 7: { // GB: LD HL,SP + dd case 7: { // GB: LD HL,SP + dd
auto before = HL(); auto before = SP().word;
auto value = fetchByte(); auto value = fetchByte();
auto result = SP().word + (int8_t)value; auto result = before + (int8_t)value;
HL().word = result; HL().word = result;
auto carried = before ^ value ^ result;
clearFlag(f, ZF | NF); clearFlag(f, ZF | NF);
setFlag(f, CF, result & Bit16); setFlag(f, CF, carried & 0x100);
adjustHalfCarryAdd(f, before.high, value, HL().high); setFlag(f, HC, carried & 0x10);
} }
cycles += 3; cycles += 3;
break; break;