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backend/rv64: Implement Identity

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This commit is contained in:
Yang Liu 2024-02-17 14:38:31 +08:00 committed by Merry
parent 1de237bf24
commit b485553ed8
3 changed files with 22 additions and 1 deletions
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8
src/dynarmic/backend/riscv64/emit_riscv64.cpp
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@ -23,12 +23,18 @@ namespace Dynarmic::Backend::RV64 {
template<IR::Opcode op>
void EmitIR(biscuit::Assembler&, EmitContext&, IR::Inst*) {
ASSERT_FALSE("Unimplemented opcode {}", op);
ASSERT_FALSE("Unimplemented opcode {} ", op);
}
template<>
void EmitIR<IR::Opcode::Void>(biscuit::Assembler&, EmitContext&, IR::Inst*) {}
template<>
void EmitIR<IR::Opcode::Identity>(biscuit::Assembler&, EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
ctx.reg_alloc.DefineAsExisting(inst, args[0]);
}
template<>
void EmitIR<IR::Opcode::A32GetRegister>(biscuit::Assembler& as, EmitContext& ctx, IR::Inst* inst);
template<>

13
src/dynarmic/backend/riscv64/reg_alloc.cpp
View file

@ -125,6 +125,19 @@ void RegAlloc::UpdateAllUses() {
}
}
void RegAlloc::DefineAsExisting(IR::Inst* inst, Argument& arg) {
ASSERT(!ValueLocation(inst));
if (arg.value.IsImmediate()) {
inst->ReplaceUsesWith(arg.value);
return;
}
auto& info = ValueInfo(arg.value.GetInst());
info.values.emplace_back(inst);
info.expected_uses += inst->UseCount();
}
void RegAlloc::AssertNoMoreUses() const {
const auto is_empty = [](const auto& i) { return i.IsCompletelyEmpty(); };
ASSERT(std::all_of(gprs.begin(), gprs.end(), is_empty));

2
src/dynarmic/backend/riscv64/reg_alloc.h
View file

@ -118,6 +118,8 @@ public:
auto WriteX(IR::Inst* inst) { return RAReg<biscuit::GPR>{*this, true, IR::Value{inst}}; }
auto WriteD(IR::Inst* inst) { return RAReg<biscuit::FPR>{*this, true, IR::Value{inst}}; }
void DefineAsExisting(IR::Inst* inst, Argument& arg);
void SpillAll();
template<typename... Ts>