| /* |
| * 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_arm.h" |
| #include "utils/assembler.h" |
| #include "utils/arm/assembler_arm.h" |
| |
| #include "mirror/array.h" |
| #include "mirror/art_method.h" |
| |
| #define __ reinterpret_cast<ArmAssembler*>(GetAssembler())-> |
| |
| namespace art { |
| namespace arm { |
| |
| void CodeGeneratorARM::GenerateFrameEntry() { |
| core_spill_mask_ |= (1 << LR); |
| // We're currently always using FP, which is callee-saved in Quick. |
| core_spill_mask_ |= (1 << FP); |
| |
| __ PushList((1 << FP) | (1 << LR)); |
| __ mov(FP, ShifterOperand(SP)); |
| |
| // Add the current ART method to the frame size, the return pc, and FP. |
| SetFrameSize(RoundUp(GetFrameSize() + 3 * kWordSize, kStackAlignment)); |
| // PC and FP have already been pushed on the stack. |
| __ AddConstant(SP, -(GetFrameSize() - 2 * kWordSize)); |
| __ str(R0, Address(SP, 0)); |
| } |
| |
| void CodeGeneratorARM::GenerateFrameExit() { |
| __ mov(SP, ShifterOperand(FP)); |
| __ PopList((1 << FP) | (1 << PC)); |
| } |
| |
| void CodeGeneratorARM::Bind(Label* label) { |
| __ Bind(label); |
| } |
| |
| void CodeGeneratorARM::Push(HInstruction* instruction, Location location) { |
| __ Push(location.reg<Register>()); |
| } |
| |
| void CodeGeneratorARM::Move(HInstruction* instruction, Location location) { |
| HIntConstant* constant = instruction->AsIntConstant(); |
| if (constant != nullptr) { |
| __ LoadImmediate(location.reg<Register>(), constant->GetValue()); |
| } else { |
| __ Pop(location.reg<Register>()); |
| } |
| } |
| |
| void LocationsBuilderARM::VisitGoto(HGoto* got) { |
| got->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitGoto(HGoto* got) { |
| HBasicBlock* successor = got->GetSuccessor(); |
| if (GetGraph()->GetExitBlock() == successor) { |
| codegen_->GenerateFrameExit(); |
| } else if (!codegen_->GoesToNextBlock(got->GetBlock(), successor)) { |
| __ b(codegen_->GetLabelOf(successor)); |
| } |
| } |
| |
| void LocationsBuilderARM::VisitExit(HExit* exit) { |
| exit->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitExit(HExit* exit) { |
| if (kIsDebugBuild) { |
| __ Comment("Unreachable"); |
| __ bkpt(0); |
| } |
| } |
| |
| void LocationsBuilderARM::VisitIf(HIf* if_instr) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(if_instr); |
| locations->SetInAt(0, Location(R0)); |
| if_instr->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitIf(HIf* if_instr) { |
| // TODO: Generate the input as a condition, instead of materializing in a register. |
| __ cmp(if_instr->GetLocations()->InAt(0).reg<Register>(), ShifterOperand(0)); |
| __ b(codegen_->GetLabelOf(if_instr->IfFalseSuccessor()), EQ); |
| if (!codegen_->GoesToNextBlock(if_instr->GetBlock(), if_instr->IfTrueSuccessor())) { |
| __ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor())); |
| } |
| } |
| |
| void LocationsBuilderARM::VisitEqual(HEqual* equal) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(equal); |
| locations->SetInAt(0, Location(R0)); |
| locations->SetInAt(1, Location(R1)); |
| locations->SetOut(Location(R0)); |
| equal->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitEqual(HEqual* equal) { |
| LocationSummary* locations = equal->GetLocations(); |
| __ teq(locations->InAt(0).reg<Register>(), |
| ShifterOperand(locations->InAt(1).reg<Register>())); |
| __ mov(locations->Out().reg<Register>(), ShifterOperand(1), EQ); |
| __ mov(locations->Out().reg<Register>(), ShifterOperand(0), NE); |
| } |
| |
| void LocationsBuilderARM::VisitLocal(HLocal* local) { |
| local->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitLocal(HLocal* local) { |
| DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock()); |
| codegen_->SetFrameSize(codegen_->GetFrameSize() + kWordSize); |
| } |
| |
| void LocationsBuilderARM::VisitLoadLocal(HLoadLocal* load) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(load); |
| locations->SetOut(Location(R0)); |
| load->SetLocations(locations); |
| } |
| |
| static int32_t GetStackSlot(HLocal* local) { |
| // We are currently using FP to access locals, so the offset must be negative. |
| return (local->GetRegNumber() + 1) * -kWordSize; |
| } |
| |
| void InstructionCodeGeneratorARM::VisitLoadLocal(HLoadLocal* load) { |
| LocationSummary* locations = load->GetLocations(); |
| __ LoadFromOffset(kLoadWord, locations->Out().reg<Register>(), |
| FP, GetStackSlot(load->GetLocal())); |
| } |
| |
| void LocationsBuilderARM::VisitStoreLocal(HStoreLocal* store) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(store); |
| locations->SetInAt(1, Location(R0)); |
| store->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitStoreLocal(HStoreLocal* store) { |
| LocationSummary* locations = store->GetLocations(); |
| __ StoreToOffset(kStoreWord, locations->InAt(1).reg<Register>(), |
| FP, GetStackSlot(store->GetLocal())); |
| } |
| |
| void LocationsBuilderARM::VisitIntConstant(HIntConstant* constant) { |
| constant->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitIntConstant(HIntConstant* constant) { |
| // Will be generated at use site. |
| } |
| |
| void LocationsBuilderARM::VisitReturnVoid(HReturnVoid* ret) { |
| ret->SetLocations(nullptr); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitReturnVoid(HReturnVoid* ret) { |
| codegen_->GenerateFrameExit(); |
| } |
| |
| void LocationsBuilderARM::VisitReturn(HReturn* ret) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(ret); |
| locations->SetInAt(0, Location(R0)); |
| ret->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitReturn(HReturn* ret) { |
| DCHECK_EQ(ret->GetLocations()->InAt(0).reg<Register>(), R0); |
| codegen_->GenerateFrameExit(); |
| } |
| |
| void LocationsBuilderARM::VisitInvokeStatic(HInvokeStatic* invoke) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(invoke); |
| CHECK_EQ(invoke->InputCount(), 0); |
| locations->AddTemp(Location(R0)); |
| invoke->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::LoadCurrentMethod(Register reg) { |
| __ ldr(reg, Address(SP, 0)); |
| } |
| |
| void InstructionCodeGeneratorARM::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_; |
| __ ldr(temp, Address(temp, mirror::ArtMethod::DexCacheResolvedMethodsOffset().Int32Value())); |
| // temp = temp[index_in_cache] |
| __ ldr(temp, Address(temp, index_in_cache)); |
| // LR = temp[offset_of_quick_compiled_code] |
| __ ldr(LR, Address(temp, |
| mirror::ArtMethod::EntryPointFromQuickCompiledCodeOffset().Int32Value())); |
| // LR() |
| __ blx(LR); |
| |
| codegen_->RecordPcInfo(invoke->GetDexPc()); |
| } |
| |
| void LocationsBuilderARM::VisitAdd(HAdd* add) { |
| LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(add); |
| switch (add->GetResultType()) { |
| case Primitive::kPrimInt: { |
| locations->SetInAt(0, Location(R0)); |
| locations->SetInAt(1, Location(R1)); |
| locations->SetOut(Location(R0)); |
| break; |
| } |
| default: |
| LOG(FATAL) << "Unimplemented"; |
| } |
| add->SetLocations(locations); |
| } |
| |
| void InstructionCodeGeneratorARM::VisitAdd(HAdd* add) { |
| LocationSummary* locations = add->GetLocations(); |
| switch (add->GetResultType()) { |
| case Primitive::kPrimInt: |
| __ add(locations->Out().reg<Register>(), |
| locations->InAt(0).reg<Register>(), |
| ShifterOperand(locations->InAt(1).reg<Register>())); |
| break; |
| default: |
| LOG(FATAL) << "Unimplemented"; |
| } |
| } |
| |
| } // namespace arm |
| } // namespace art |