| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "code_generator_x86.h" |
| #include "utils/assembler.h" |
| #include "utils/x86/assembler_x86.h" |
| |
| #include "mirror/array.h" |
| #include "mirror/art_method.h" |
| |
| #define __ reinterpret_cast<X86Assembler*>(GetAssembler())-> |
| |
| namespace art { |
| namespace x86 { |
| |
| void CodeGeneratorX86::GenerateFrameEntry() { |
| // Create a fake register to mimic Quick. |
| static const int kFakeReturnRegister = 8; |
| core_spill_mask_ |= (1 << kFakeReturnRegister); |
| // We're currently always using EBP, which is callee-saved in Quick. |
| core_spill_mask_ |= (1 << EBP); |
| |
| __ pushl(EBP); |
| __ movl(EBP, ESP); |
| // Add the current ART method to the frame size, the return pc, and EBP. |
| SetFrameSize(RoundUp(GetFrameSize() + 3 * kWordSize, kStackAlignment)); |
| // The PC and EBP have already been pushed on the stack. |
| __ subl(ESP, Immediate(GetFrameSize() - 2 * kWordSize)); |
| __ movl(Address(ESP, 0), EAX); |
| } |
| |
| void CodeGeneratorX86::GenerateFrameExit() { |
| __ movl(ESP, EBP); |
| __ popl(EBP); |
| } |
| |
| void CodeGeneratorX86::Bind(Label* label) { |
| __ Bind(label); |
| } |
| |
| void CodeGeneratorX86::Push(HInstruction* instruction, Location location) { |
| __ pushl(location.reg<Register>()); |
| } |
| |
| void InstructionCodeGeneratorX86::LoadCurrentMethod(Register reg) { |
| __ movl(reg, Address(ESP, 0)); |
| } |
| |
| void CodeGeneratorX86::Move(HInstruction* instruction, Location location) { |
| HIntConstant* constant = instruction->AsIntConstant(); |
| if (constant != nullptr) { |
| __ movl(location.reg<Register>(), Immediate(constant->GetValue())); |
| } else { |
| __ popl(location.reg<Register>()); |
| } |
| } |
| |
| void LocationsBuilderX86::VisitGoto(HGoto* got) { |
| got->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitGoto(HGoto* got) { |
| HBasicBlock* successor = got->GetSuccessor(); |
| if (GetGraph()->GetExitBlock() == successor) { |
| codegen_->GenerateFrameExit(); |
| } else if (!codegen_->GoesToNextBlock(got->GetBlock(), successor)) { |
| __ jmp(codegen_->GetLabelOf(successor)); |
| } |
| } |
| |
| void LocationsBuilderX86::VisitExit(HExit* exit) { |
| exit->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitExit(HExit* exit) { |
| if (kIsDebugBuild) { |
| __ Comment("Unreachable"); |
| __ int3(); |
| } |
| } |
| |
| void LocationsBuilderX86::VisitIf(HIf* if_instr) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(if_instr); |
| locations->SetInAt(0, Location(EAX)); |
| if_instr->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitIf(HIf* if_instr) { |
| // TODO: Generate the input as a condition, instead of materializing in a register. |
| __ cmpl(if_instr->GetLocations()->InAt(0).reg<Register>(), Immediate(0)); |
| __ j(kEqual, codegen_->GetLabelOf(if_instr->IfFalseSuccessor())); |
| if (!codegen_->GoesToNextBlock(if_instr->GetBlock(), if_instr->IfTrueSuccessor())) { |
| __ jmp(codegen_->GetLabelOf(if_instr->IfTrueSuccessor())); |
| } |
| } |
| |
| void LocationsBuilderX86::VisitLocal(HLocal* local) { |
| local->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitLocal(HLocal* local) { |
| DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock()); |
| codegen_->SetFrameSize(codegen_->GetFrameSize() + kWordSize); |
| } |
| |
| void LocationsBuilderX86::VisitLoadLocal(HLoadLocal* local) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(local); |
| locations->SetOut(Location(EAX)); |
| local->SetLocations(locations); |
| } |
| |
| static int32_t GetStackSlot(HLocal* local) { |
| // We are currently using EBP to access locals, so the offset must be negative. |
| // +1 for going backwards, +1 for the method pointer. |
| return (local->GetRegNumber() + 2) * -kWordSize; |
| } |
| |
| void InstructionCodeGeneratorX86::VisitLoadLocal(HLoadLocal* load) { |
| __ movl(load->GetLocations()->Out().reg<Register>(), |
| Address(EBP, GetStackSlot(load->GetLocal()))); |
| } |
| |
| void LocationsBuilderX86::VisitStoreLocal(HStoreLocal* local) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(local); |
| locations->SetInAt(1, Location(EAX)); |
| local->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitStoreLocal(HStoreLocal* store) { |
| __ movl(Address(EBP, GetStackSlot(store->GetLocal())), |
| store->GetLocations()->InAt(1).reg<Register>()); |
| } |
| |
| void LocationsBuilderX86::VisitEqual(HEqual* equal) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(equal); |
| locations->SetInAt(0, Location(EAX)); |
| locations->SetInAt(1, Location(ECX)); |
| locations->SetOut(Location(EAX)); |
| equal->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitEqual(HEqual* equal) { |
| __ cmpl(equal->GetLocations()->InAt(0).reg<Register>(), |
| equal->GetLocations()->InAt(1).reg<Register>()); |
| __ setb(kEqual, equal->GetLocations()->Out().reg<Register>()); |
| } |
| |
| void LocationsBuilderX86::VisitIntConstant(HIntConstant* constant) { |
| constant->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitIntConstant(HIntConstant* constant) { |
| // Will be generated at use site. |
| } |
| |
| void LocationsBuilderX86::VisitReturnVoid(HReturnVoid* ret) { |
| ret->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitReturnVoid(HReturnVoid* ret) { |
| codegen_->GenerateFrameExit(); |
| __ ret(); |
| } |
| |
| void LocationsBuilderX86::VisitReturn(HReturn* ret) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(ret); |
| locations->SetInAt(0, Location(EAX)); |
| ret->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitReturn(HReturn* ret) { |
| DCHECK_EQ(ret->GetLocations()->InAt(0).reg<Register>(), EAX); |
| codegen_->GenerateFrameExit(); |
| __ ret(); |
| } |
| |
| void LocationsBuilderX86::VisitInvokeStatic(HInvokeStatic* invoke) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(invoke); |
| CHECK_EQ(invoke->InputCount(), 0); |
| locations->AddTemp(Location(EAX)); |
| invoke->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitInvokeStatic(HInvokeStatic* invoke) { |
| Register temp = invoke->GetLocations()->GetTemp(0).reg<Register>(); |
| size_t index_in_cache = mirror::Array::DataOffset(sizeof(mirror::Object*)).Int32Value() + |
| invoke->GetIndexInDexCache() * kWordSize; |
| |
| // TODO: Implement all kinds of calls: |
| // 1) boot -> boot |
| // 2) app -> boot |
| // 3) app -> app |
| // |
| // Currently we implement the app -> app logic, which looks up in the resolve cache. |
| |
| // temp = method; |
| LoadCurrentMethod(temp); |
| // temp = temp->dex_cache_resolved_methods_; |
| __ movl(temp, Address(temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().Int32Value())); |
| // temp = temp[index_in_cache] |
| __ movl(temp, Address(temp, index_in_cache)); |
| // (temp + offset_of_quick_compiled_code)() |
| __ call(Address(temp, mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset().Int32Value())); |
| |
| codegen_->RecordPcInfo(invoke->GetDexPc()); |
| } |
| |
| void LocationsBuilderX86::VisitAdd(HAdd* add) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(add); |
| switch (add->GetResultType()) { |
| case Primitive::kPrimInt: { |
| locations->SetInAt(0, Location(EAX)); |
| locations->SetInAt(1, Location(ECX)); |
| locations->SetOut(Location(EAX)); |
| break; |
| } |
| default: |
| LOG(FATAL) << "Unimplemented"; |
| } |
| add->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorX86::VisitAdd(HAdd* add) { |
| LocationSummary* locations = add->GetLocations(); |
| switch (add->GetResultType()) { |
| case Primitive::kPrimInt: |
| DCHECK_EQ(locations->InAt(0).reg<Register>(), locations->Out().reg<Register>()); |
| __ addl(locations->InAt(0).reg<Register>(), locations->InAt(1).reg<Register>()); |
| break; |
| default: |
| LOG(FATAL) << "Unimplemented"; |
| } |
| } |
| |
| } // namespace x86 |
| } // namespace art |