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IR: Implement new pseudo-operation GetGEFromOp

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This commit is contained in:
MerryMage 2016-12-04 20:52:06 +00:00
parent 370f654590
commit 7cad6949e7
4 changed files with 26 additions and 1 deletions
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4
src/backend_x64/emit_x64.cpp
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@ -443,6 +443,10 @@ void EmitX64::EmitGetOverflowFromOp(IR::Block&, IR::Inst*) {
ASSERT_MSG(false, "should never happen");
}
void EmitX64::EmitGetGEFromOp(IR::Block&, IR::Inst*) {
ASSERT_MSG(false, "should never happen");
}
void EmitX64::EmitPack2x32To1x64(IR::Block&, IR::Inst* inst) {
OpArg lo;
Xbyak::Reg64 result;

15
src/frontend/ir/microinstruction.cpp
View file

@ -232,9 +232,14 @@ Inst* Inst::GetAssociatedPseudoOperation(Opcode opcode) {
// This is faster than doing a search through the block.
switch (opcode) {
case IR::Opcode::GetCarryFromOp:
DEBUG_ASSERT(!carry_inst || carry_inst->GetOpcode() == Opcode::GetCarryFromOp);
return carry_inst;
case IR::Opcode::GetOverflowFromOp:
DEBUG_ASSERT(!overflow_inst || overflow_inst->GetOpcode() == Opcode::GetOverflowFromOp);
return overflow_inst;
case IR::Opcode::GetGEFromOp:
DEBUG_ASSERT(!ge_inst || ge_inst->GetOpcode() == Opcode::GetGEFromOp);
return ge_inst;
default:
break;
}
@ -302,6 +307,10 @@ void Inst::Use(Value& value) {
ASSERT_MSG(!value.GetInst()->overflow_inst, "Only one of each type of pseudo-op allowed");
value.GetInst()->overflow_inst = this;
break;
case Opcode::GetGEFromOp:
ASSERT_MSG(!value.GetInst()->ge_inst, "Only one of each type of pseudo-op allowed");
value.GetInst()->ge_inst = this;
break;
default:
break;
}
@ -312,11 +321,17 @@ void Inst::UndoUse(Value& value) {
switch (op){
case Opcode::GetCarryFromOp:
DEBUG_ASSERT(value.GetInst()->carry_inst->GetOpcode() == Opcode::GetCarryFromOp);
value.GetInst()->carry_inst = nullptr;
break;
case Opcode::GetOverflowFromOp:
DEBUG_ASSERT(value.GetInst()->overflow_inst->GetOpcode() == Opcode::GetOverflowFromOp);
value.GetInst()->overflow_inst = nullptr;
break;
case Opcode::GetGEFromOp:
DEBUG_ASSERT(value.GetInst()->ge_inst->GetOpcode() == Opcode::GetGEFromOp);
value.GetInst()->ge_inst = nullptr;
break;
default:
break;
}

7
src/frontend/ir/microinstruction.h
View file

@ -102,7 +102,12 @@ private:
size_t use_count = 0;
std::array<Value, 3> args;
Inst* carry_inst = nullptr;
// Pointers to related pseudooperations:
// Since not all combinations are possible, we use a union to save space
union {
Inst* carry_inst = nullptr;
Inst* ge_inst;
};
Inst* overflow_inst = nullptr;
};

1
src/frontend/ir/opcodes.inc
View file

@ -36,6 +36,7 @@ OPCODE(PushRSB, T::Void, T::U64
// Pseudo-operation, handled specially at final emit
OPCODE(GetCarryFromOp, T::U1, T::U32 )
OPCODE(GetOverflowFromOp, T::U1, T::U32 )
OPCODE(GetGEFromOp, T::U32, T::U32 )
// Calculations
OPCODE(Pack2x32To1x64, T::U64, T::U32, T::U32 )