dynarmic/src/frontend/ir/microinstruction.cpp

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/* This file is part of the dynarmic project.
* Copyright (c) 2016 MerryMage
* This software may be used and distributed according to the terms of the GNU
* General Public License version 2 or any later version.
*/
#include "common/assert.h"
#include "frontend/ir/microinstruction.h"
namespace Dynarmic {
namespace IR {
Value Inst::GetArg(size_t index) const {
DEBUG_ASSERT(index < GetNumArgsOf(op));
DEBUG_ASSERT(!args[index].IsEmpty());
return args[index];
}
void Inst::SetArg(size_t index, Value value) {
DEBUG_ASSERT(index < GetNumArgsOf(op));
DEBUG_ASSERT(value.GetType() == GetArgTypeOf(op, index) || Type::Opaque == GetArgTypeOf(op, index));
if (!args[index].IsImmediate()) {
UndoUse(args[index]);
}
if (!value.IsImmediate()) {
Use(value);
}
args[index] = value;
}
void Inst::Invalidate() {
for (auto& value : args) {
if (!value.IsImmediate()) {
UndoUse(value);
}
}
}
void Inst::ReplaceUsesWith(Value& replacement) {
Invalidate();
op = Opcode::Identity;
if (!replacement.IsImmediate()) {
Use(replacement);
}
args[0] = replacement;
}
void Inst::Use(Value& value) {
value.GetInst()->use_count++;
switch (op){
case Opcode::GetCarryFromOp:
value.GetInst()->carry_inst = this;
break;
case Opcode::GetOverflowFromOp:
value.GetInst()->overflow_inst = this;
break;
default:
break;
}
}
void Inst::UndoUse(Value& value) {
value.GetInst()->use_count--;
switch (op){
case Opcode::GetCarryFromOp:
value.GetInst()->carry_inst = nullptr;
break;
case Opcode::GetOverflowFromOp:
value.GetInst()->overflow_inst = nullptr;
break;
default:
break;
}
}
} // namespace IR
} // namespace Dynarmic