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OpcodeDispatcher: factor out CalculateAFForDecimal

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
This commit is contained in:
Alyssa Rosenzweig 2024-03-25 14:07:53 -04:00
parent 3ca2c4377f
commit 583d4f8f94
2 changed files with 11 additions and 12 deletions
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22
FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
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@ -3117,16 +3117,19 @@ void OpDispatchBuilder::PopcountOp(OpcodeArgs) {
GenerateFlags_POPCOUNT(Op, Src);
}
OrderedNode *OpDispatchBuilder::CalculateAFForDecimal(OrderedNode *A) {
auto Nibble = _And(OpSize::i64Bit, A, _Constant(0xF));
auto Greater = _Select(FEXCore::IR::COND_UGT, Nibble, _Constant(9),
_Constant(1), _Constant(0));
return _Or(OpSize::i64Bit, LoadAF(), Greater);
}
void OpDispatchBuilder::DAAOp(OpcodeArgs) {
CalculateDeferredFlags();
auto AL = LoadGPRRegister(X86State::REG_RAX, 1);
auto CF = GetRFLAG(FEXCore::X86State::RFLAG_CF_RAW_LOC);
auto AF = LoadAF();
// AF |= ((AL & 0x0F) > 9);
AF = _Or(OpSize::i64Bit, AF,
_Select(FEXCore::IR::COND_UGT, _And(OpSize::i64Bit, AL, _Constant(0xF)), _Constant(9),
_Constant(1), _Constant(0)));
auto AF = CalculateAFForDecimal(AL);
// CF |= (AL > 0x99);
CF = _Or(OpSize::i64Bit, CF, _Select(FEXCore::IR::COND_UGT, AL, _Constant(0x99), _Constant(1), _Constant(0)));
@ -3223,13 +3226,8 @@ void OpDispatchBuilder::DASOp(OpcodeArgs) {
void OpDispatchBuilder::AAAOp(OpcodeArgs) {
InvalidateDeferredFlags();
auto AF = LoadAF();
auto A = LoadGPRRegister(X86State::REG_RAX);
// AF |= ((AL & 0x0F) > 9);
AF = _Or(OpSize::i32Bit, AF,
_Select(FEXCore::IR::COND_UGT, _And(OpSize::i32Bit, A, _Constant(0xF)), _Constant(9),
_Constant(1), _Constant(0)));
auto AF = CalculateAFForDecimal(A);
// CF = AF, OF/SF/ZF/PF undefined
ZeroNZCV();

1
FEXCore/Source/Interface/Core/OpcodeDispatcher.h
View File

@ -1765,6 +1765,7 @@ private:
OrderedNode *LoadAF();
void FixupAF();
void SetAFAndFixup(OrderedNode *AF);
OrderedNode *CalculateAFForDecimal(OrderedNode *A);
void CalculatePF(OrderedNode *Res);
void CalculateAF(OrderedNode *Src1, OrderedNode *Src2);