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OpcodeDispatcher: Optimize calls with push

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Ryan Houdek committed 2023-08-30 16:25:01 -07:00
1 parent d738538a34
commit b20c518bf0
1 file changed
+4 -9
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FEXCore/Source/Interface/Core/OpcodeDispatcher.cpp
+4 -9
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@@ -789,17 +789,14 @@ void OpDispatchBuilder::CALLOp(OpcodeArgs) {
OrderedNode *JMPPCOffset = LoadSource(GPRClass, Op, Op->Src[0], Op->Flags, -1);
OrderedNode *NewRIP = _Add(IR::SizeToOpSize(GPRSize), ConstantPC, JMPPCOffset);
auto ConstantPCReturn = GetRelocatedPC(Op);
auto ConstantSize = _Constant(GPRSize);
// Push the return address.
auto OldSP = LoadGPRRegister(X86State::REG_RSP);
auto NewSP = _Sub(OpSize::i64Bit, OldSP, ConstantSize);
auto NewSP = _Push(GPRSize, GPRSize, ConstantPC, OldSP);
// Store the new stack pointer
StoreGPRRegister(X86State::REG_RSP, NewSP);
_StoreMem(GPRClass, GPRSize, NewSP, ConstantPCReturn, GPRSize);
const uint64_t NextRIP = Op->PC + Op->InstSize;
LOGMAN_THROW_A_FMT(Op->Src[0].IsLiteral(), "Had wrong operand type");
const uint64_t TargetRIP = Op->PC + Op->InstSize + Op->Src[0].Data.Literal.Value;
@@ -825,15 +822,13 @@ void OpDispatchBuilder::CALLAbsoluteOp(OpcodeArgs) {
auto ConstantPCReturn = GetRelocatedPC(Op);
auto ConstantSize = _Constant(Size);
// Push the return address.
auto OldSP = LoadGPRRegister(X86State::REG_RSP);
auto NewSP = _Sub(OpSize::i64Bit, OldSP, ConstantSize);
auto NewSP = _Push(Size, Size, ConstantPCReturn, OldSP);
// Store the new stack pointer
StoreGPRRegister(X86State::REG_RSP, NewSP);
_StoreMem(GPRClass, Size, NewSP, ConstantPCReturn, Size);
// Store the RIP
CalculateDeferredFlags();
_ExitFunction(JMPPCOffset); // If we get here then leave the function now