/*
* 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 "entrypoints/quick/quick_entrypoints.h"
#include "gc/accounting/card_table.h"
#include "mirror/array.h"
#include "mirror/art_method.h"
#include "thread.h"
#include "utils/assembler.h"
#include "utils/arm/assembler_arm.h"
#include "utils/arm/managed_register_arm.h"
#include "utils/stack_checks.h"
namespace art {
arm::ArmManagedRegister Location::AsArm() const {
return reg().AsArm();
}
namespace arm {
static constexpr bool kExplicitStackOverflowCheck = false;
static constexpr int kNumberOfPushedRegistersAtEntry = 1 + 2; // LR, R6, R7
static constexpr int kCurrentMethodStackOffset = 0;
static Location ArmCoreLocation(Register reg) {
return Location::RegisterLocation(ArmManagedRegister::FromCoreRegister(reg));
}
static constexpr Register kRuntimeParameterCoreRegisters[] = { R0, R1, R2 };
static constexpr size_t kRuntimeParameterCoreRegistersLength =
arraysize(kRuntimeParameterCoreRegisters);
class InvokeRuntimeCallingConvention : public CallingConvention<Register> {
public:
InvokeRuntimeCallingConvention()
: CallingConvention(kRuntimeParameterCoreRegisters,
kRuntimeParameterCoreRegistersLength) {}
private:
DISALLOW_COPY_AND_ASSIGN(InvokeRuntimeCallingConvention);
};
#define __ reinterpret_cast<ArmAssembler*>(codegen->GetAssembler())->
class NullCheckSlowPathARM : public SlowPathCode {
public:
explicit NullCheckSlowPathARM(uint32_t dex_pc) : dex_pc_(dex_pc) {}
virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
__ Bind(GetEntryLabel());
int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pThrowNullPointer).Int32Value();
__ ldr(LR, Address(TR, offset));
__ blx(LR);
codegen->RecordPcInfo(dex_pc_);
}
private:
const uint32_t dex_pc_;
DISALLOW_COPY_AND_ASSIGN(NullCheckSlowPathARM);
};
class StackOverflowCheckSlowPathARM : public SlowPathCode {
public:
StackOverflowCheckSlowPathARM() {}
virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
__ Bind(GetEntryLabel());
__ LoadFromOffset(kLoadWord, PC, TR,
QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pThrowStackOverflow).Int32Value());
}
private:
DISALLOW_COPY_AND_ASSIGN(StackOverflowCheckSlowPathARM);
};
class BoundsCheckSlowPathARM : public SlowPathCode {
public:
explicit BoundsCheckSlowPathARM(uint32_t dex_pc,
Location index_location,
Location length_location)
: dex_pc_(dex_pc), index_location_(index_location), length_location_(length_location) {}
virtual void EmitNativeCode(CodeGenerator* codegen) OVERRIDE {
CodeGeneratorARM* arm_codegen = reinterpret_cast<CodeGeneratorARM*>(codegen);
__ Bind(GetEntryLabel());
InvokeRuntimeCallingConvention calling_convention;
arm_codegen->Move32(ArmCoreLocation(calling_convention.GetRegisterAt(0)), index_location_);
arm_codegen->Move32(ArmCoreLocation(calling_convention.GetRegisterAt(1)), length_location_);
int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pThrowArrayBounds).Int32Value();
__ ldr(LR, Address(TR, offset));
__ blx(LR);
codegen->RecordPcInfo(dex_pc_);
}
private:
const uint32_t dex_pc_;
const Location index_location_;
const Location length_location_;
DISALLOW_COPY_AND_ASSIGN(BoundsCheckSlowPathARM);
};
#undef __
#define __ reinterpret_cast<ArmAssembler*>(GetAssembler())->
inline Condition ARMCondition(IfCondition cond) {
switch (cond) {
case kCondEQ: return EQ;
case kCondNE: return NE;
case kCondLT: return LT;
case kCondLE: return LE;
case kCondGT: return GT;
case kCondGE: return GE;
default:
LOG(FATAL) << "Unknown if condition";
}
return EQ; // Unreachable.
}
inline Condition ARMOppositeCondition(IfCondition cond) {
switch (cond) {
case kCondEQ: return NE;
case kCondNE: return EQ;
case kCondLT: return GE;
case kCondLE: return GT;
case kCondGT: return LE;
case kCondGE: return LT;
default:
LOG(FATAL) << "Unknown if condition";
}
return EQ; // Unreachable.
}
void CodeGeneratorARM::DumpCoreRegister(std::ostream& stream, int reg) const {
stream << ArmManagedRegister::FromCoreRegister(Register(reg));
}
void CodeGeneratorARM::DumpFloatingPointRegister(std::ostream& stream, int reg) const {
stream << ArmManagedRegister::FromDRegister(DRegister(reg));
}
CodeGeneratorARM::CodeGeneratorARM(HGraph* graph)
: CodeGenerator(graph, kNumberOfRegIds),
location_builder_(graph, this),
instruction_visitor_(graph, this),
move_resolver_(graph->GetArena(), this),
assembler_(true) {}
size_t CodeGeneratorARM::FrameEntrySpillSize() const {
return kNumberOfPushedRegistersAtEntry * kArmWordSize;
}
static bool* GetBlockedRegisterPairs(bool* blocked_registers) {
return blocked_registers + kNumberOfAllocIds;
}
ManagedRegister CodeGeneratorARM::AllocateFreeRegister(Primitive::Type type,
bool* blocked_registers) const {
switch (type) {
case Primitive::kPrimLong: {
bool* blocked_register_pairs = GetBlockedRegisterPairs(blocked_registers);
size_t reg = AllocateFreeRegisterInternal(blocked_register_pairs, kNumberOfRegisterPairs);
ArmManagedRegister pair =
ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(reg));
blocked_registers[pair.AsRegisterPairLow()] = true;
blocked_registers[pair.AsRegisterPairHigh()] = true;
// Block all other register pairs that share a register with `pair`.
for (int i = 0; i < kNumberOfRegisterPairs; i++) {
ArmManagedRegister current =
ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
if (current.AsRegisterPairLow() == pair.AsRegisterPairLow()
|| current.AsRegisterPairLow() == pair.AsRegisterPairHigh()
|| current.AsRegisterPairHigh() == pair.AsRegisterPairLow()
|| current.AsRegisterPairHigh() == pair.AsRegisterPairHigh()) {
blocked_register_pairs[i] = true;
}
}
return pair;
}
case Primitive::kPrimByte:
case Primitive::kPrimBoolean:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot: {
int reg = AllocateFreeRegisterInternal(blocked_registers, kNumberOfCoreRegisters);
// Block all register pairs that contain `reg`.
bool* blocked_register_pairs = GetBlockedRegisterPairs(blocked_registers);
for (int i = 0; i < kNumberOfRegisterPairs; i++) {
ArmManagedRegister current =
ArmManagedRegister::FromRegisterPair(static_cast<RegisterPair>(i));
if (current.AsRegisterPairLow() == reg || current.AsRegisterPairHigh() == reg) {
blocked_register_pairs[i] = true;
}
}
return ArmManagedRegister::FromCoreRegister(static_cast<Register>(reg));
}
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented register type " << type;
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable type " << type;
}
return ManagedRegister::NoRegister();
}
void CodeGeneratorARM::SetupBlockedRegisters(bool* blocked_registers) const {
bool* blocked_register_pairs = GetBlockedRegisterPairs(blocked_registers);
// Don't allocate the dalvik style register pair passing.
blocked_register_pairs[R1_R2] = true;
// Stack register, LR and PC are always reserved.
blocked_registers[SP] = true;
blocked_registers[LR] = true;
blocked_registers[PC] = true;
// Reserve R4 for suspend check.
blocked_registers[R4] = true;
blocked_register_pairs[R4_R5] = true;
// Reserve thread register.
blocked_registers[TR] = true;
// Reserve temp register.
blocked_registers[IP] = true;
// TODO: We currently don't use Quick's callee saved registers.
// We always save and restore R6 and R7 to make sure we can use three
// register pairs for long operations.
blocked_registers[R5] = true;
blocked_registers[R8] = true;
blocked_registers[R10] = true;
blocked_registers[R11] = true;
}
size_t CodeGeneratorARM::GetNumberOfRegisters() const {
return kNumberOfRegIds;
}
InstructionCodeGeneratorARM::InstructionCodeGeneratorARM(HGraph* graph, CodeGeneratorARM* codegen)
: HGraphVisitor(graph),
assembler_(codegen->GetAssembler()),
codegen_(codegen) {}
void CodeGeneratorARM::GenerateFrameEntry() {
bool skip_overflow_check = IsLeafMethod() && !FrameNeedsStackCheck(GetFrameSize(), InstructionSet::kArm);
if (!skip_overflow_check) {
if (kExplicitStackOverflowCheck) {
SlowPathCode* slow_path = new (GetGraph()->GetArena()) StackOverflowCheckSlowPathARM();
AddSlowPath(slow_path);
__ LoadFromOffset(kLoadWord, IP, TR, Thread::StackEndOffset<kArmWordSize>().Int32Value());
__ cmp(SP, ShifterOperand(IP));
__ b(slow_path->GetEntryLabel(), CC);
} else {
__ AddConstant(IP, SP, -static_cast<int32_t>(GetStackOverflowReservedBytes(kArm)));
__ ldr(IP, Address(IP, 0));
RecordPcInfo(0);
}
}
core_spill_mask_ |= (1 << LR | 1 << R6 | 1 << R7);
__ PushList(1 << LR | 1 << R6 | 1 << R7);
// The return PC has already been pushed on the stack.
__ AddConstant(SP, -(GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize));
__ str(R0, Address(SP, 0));
}
void CodeGeneratorARM::GenerateFrameExit() {
__ AddConstant(SP, GetFrameSize() - kNumberOfPushedRegistersAtEntry * kArmWordSize);
__ PopList(1 << PC | 1 << R6 | 1 << R7);
}
void CodeGeneratorARM::Bind(Label* label) {
__ Bind(label);
}
Location CodeGeneratorARM::GetStackLocation(HLoadLocal* load) const {
switch (load->GetType()) {
case Primitive::kPrimLong:
return Location::DoubleStackSlot(GetStackSlot(load->GetLocal()));
break;
case Primitive::kPrimInt:
case Primitive::kPrimNot:
return Location::StackSlot(GetStackSlot(load->GetLocal()));
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented type " << load->GetType();
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimVoid:
LOG(FATAL) << "Unexpected type " << load->GetType();
}
LOG(FATAL) << "Unreachable";
return Location();
}
Location InvokeDexCallingConventionVisitor::GetNextLocation(Primitive::Type type) {
switch (type) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot: {
uint32_t index = gp_index_++;
if (index < calling_convention.GetNumberOfRegisters()) {
return ArmCoreLocation(calling_convention.GetRegisterAt(index));
} else {
return Location::StackSlot(calling_convention.GetStackOffsetOf(index));
}
}
case Primitive::kPrimLong: {
uint32_t index = gp_index_;
gp_index_ += 2;
if (index + 1 < calling_convention.GetNumberOfRegisters()) {
return Location::RegisterLocation(ArmManagedRegister::FromRegisterPair(
calling_convention.GetRegisterPairAt(index)));
} else if (index + 1 == calling_convention.GetNumberOfRegisters()) {
return Location::QuickParameter(index);
} else {
return Location::DoubleStackSlot(calling_convention.GetStackOffsetOf(index));
}
}
case Primitive::kPrimDouble:
case Primitive::kPrimFloat:
LOG(FATAL) << "Unimplemented parameter type " << type;
break;
case Primitive::kPrimVoid:
LOG(FATAL) << "Unexpected parameter type " << type;
break;
}
return Location();
}
void CodeGeneratorARM::Move32(Location destination, Location source) {
if (source.Equals(destination)) {
return;
}
if (destination.IsRegister()) {
if (source.IsRegister()) {
__ Mov(destination.AsArm().AsCoreRegister(), source.AsArm().AsCoreRegister());
} else {
__ ldr(destination.AsArm().AsCoreRegister(), Address(SP, source.GetStackIndex()));
}
} else {
DCHECK(destination.IsStackSlot());
if (source.IsRegister()) {
__ str(source.AsArm().AsCoreRegister(), Address(SP, destination.GetStackIndex()));
} else {
__ ldr(IP, Address(SP, source.GetStackIndex()));
__ str(IP, Address(SP, destination.GetStackIndex()));
}
}
}
void CodeGeneratorARM::Move64(Location destination, Location source) {
if (source.Equals(destination)) {
return;
}
if (destination.IsRegister()) {
if (source.IsRegister()) {
__ Mov(destination.AsArm().AsRegisterPairLow(), source.AsArm().AsRegisterPairLow());
__ Mov(destination.AsArm().AsRegisterPairHigh(), source.AsArm().AsRegisterPairHigh());
} else if (source.IsQuickParameter()) {
uint32_t argument_index = source.GetQuickParameterIndex();
InvokeDexCallingConvention calling_convention;
__ Mov(destination.AsArm().AsRegisterPairLow(),
calling_convention.GetRegisterAt(argument_index));
__ ldr(destination.AsArm().AsRegisterPairHigh(),
Address(SP, calling_convention.GetStackOffsetOf(argument_index + 1) + GetFrameSize()));
} else {
DCHECK(source.IsDoubleStackSlot());
if (destination.AsArm().AsRegisterPair() == R1_R2) {
__ ldr(R1, Address(SP, source.GetStackIndex()));
__ ldr(R2, Address(SP, source.GetHighStackIndex(kArmWordSize)));
} else {
__ LoadFromOffset(kLoadWordPair, destination.AsArm().AsRegisterPairLow(),
SP, source.GetStackIndex());
}
}
} else if (destination.IsQuickParameter()) {
InvokeDexCallingConvention calling_convention;
uint32_t argument_index = destination.GetQuickParameterIndex();
if (source.IsRegister()) {
__ Mov(calling_convention.GetRegisterAt(argument_index), source.AsArm().AsRegisterPairLow());
__ str(source.AsArm().AsRegisterPairHigh(),
Address(SP, calling_convention.GetStackOffsetOf(argument_index + 1)));
} else {
DCHECK(source.IsDoubleStackSlot());
__ ldr(calling_convention.GetRegisterAt(argument_index), Address(SP, source.GetStackIndex()));
__ ldr(R0, Address(SP, source.GetHighStackIndex(kArmWordSize)));
__ str(R0, Address(SP, calling_convention.GetStackOffsetOf(argument_index + 1)));
}
} else {
DCHECK(destination.IsDoubleStackSlot());
if (source.IsRegister()) {
if (source.AsArm().AsRegisterPair() == R1_R2) {
__ str(R1, Address(SP, destination.GetStackIndex()));
__ str(R2, Address(SP, destination.GetHighStackIndex(kArmWordSize)));
} else {
__ StoreToOffset(kStoreWordPair, source.AsArm().AsRegisterPairLow(),
SP, destination.GetStackIndex());
}
} else if (source.IsQuickParameter()) {
InvokeDexCallingConvention calling_convention;
uint32_t argument_index = source.GetQuickParameterIndex();
__ str(calling_convention.GetRegisterAt(argument_index),
Address(SP, destination.GetStackIndex()));
__ ldr(R0,
Address(SP, calling_convention.GetStackOffsetOf(argument_index + 1) + GetFrameSize()));
__ str(R0, Address(SP, destination.GetHighStackIndex(kArmWordSize)));
} else {
DCHECK(source.IsDoubleStackSlot());
__ ldr(IP, Address(SP, source.GetStackIndex()));
__ str(IP, Address(SP, destination.GetStackIndex()));
__ ldr(IP, Address(SP, source.GetHighStackIndex(kArmWordSize)));
__ str(IP, Address(SP, destination.GetHighStackIndex(kArmWordSize)));
}
}
}
void CodeGeneratorARM::Move(HInstruction* instruction, Location location, HInstruction* move_for) {
LocationSummary* locations = instruction->GetLocations();
if (locations != nullptr && locations->Out().Equals(location)) {
return;
}
if (instruction->AsIntConstant() != nullptr) {
int32_t value = instruction->AsIntConstant()->GetValue();
if (location.IsRegister()) {
__ LoadImmediate(location.AsArm().AsCoreRegister(), value);
} else {
DCHECK(location.IsStackSlot());
__ LoadImmediate(IP, value);
__ str(IP, Address(SP, location.GetStackIndex()));
}
} else if (instruction->AsLongConstant() != nullptr) {
int64_t value = instruction->AsLongConstant()->GetValue();
if (location.IsRegister()) {
__ LoadImmediate(location.AsArm().AsRegisterPairLow(), Low32Bits(value));
__ LoadImmediate(location.AsArm().AsRegisterPairHigh(), High32Bits(value));
} else {
DCHECK(location.IsDoubleStackSlot());
__ LoadImmediate(IP, Low32Bits(value));
__ str(IP, Address(SP, location.GetStackIndex()));
__ LoadImmediate(IP, High32Bits(value));
__ str(IP, Address(SP, location.GetHighStackIndex(kArmWordSize)));
}
} else if (instruction->AsLoadLocal() != nullptr) {
uint32_t stack_slot = GetStackSlot(instruction->AsLoadLocal()->GetLocal());
switch (instruction->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot:
Move32(location, Location::StackSlot(stack_slot));
break;
case Primitive::kPrimLong:
Move64(location, Location::DoubleStackSlot(stack_slot));
break;
default:
LOG(FATAL) << "Unimplemented type " << instruction->GetType();
}
} else {
DCHECK((instruction->GetNext() == move_for) || instruction->GetNext()->IsTemporary());
switch (instruction->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimNot:
case Primitive::kPrimInt:
Move32(location, locations->Out());
break;
case Primitive::kPrimLong:
Move64(location, locations->Out());
break;
default:
LOG(FATAL) << "Unimplemented type " << instruction->GetType();
}
}
}
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);
HInstruction* cond = if_instr->InputAt(0);
DCHECK(cond->IsCondition());
HCondition* condition = cond->AsCondition();
if (condition->NeedsMaterialization()) {
locations->SetInAt(0, Location::Any());
}
if_instr->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitIf(HIf* if_instr) {
HInstruction* cond = if_instr->InputAt(0);
DCHECK(cond->IsCondition());
HCondition* condition = cond->AsCondition();
if (condition->NeedsMaterialization()) {
// Condition has been materialized, compare the output to 0
DCHECK(if_instr->GetLocations()->InAt(0).IsRegister());
__ cmp(if_instr->GetLocations()->InAt(0).AsArm().AsCoreRegister(),
ShifterOperand(0));
__ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()), EQ);
} else {
// Condition has not been materialized, use its inputs as the comparison and its
// condition as the branch condition.
LocationSummary* locations = condition->GetLocations();
if (locations->InAt(1).IsRegister()) {
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(),
ShifterOperand(locations->InAt(1).AsArm().AsCoreRegister()));
} else {
DCHECK(locations->InAt(1).IsConstant());
int32_t value = locations->InAt(1).GetConstant()->AsIntConstant()->GetValue();
ShifterOperand operand;
if (ShifterOperand::CanHoldArm(value, &operand)) {
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(value));
} else {
Register temp = IP;
__ LoadImmediate(temp, value);
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(temp));
}
}
__ b(codegen_->GetLabelOf(if_instr->IfTrueSuccessor()),
ARMCondition(condition->GetCondition()));
}
if (!codegen_->GoesToNextBlock(if_instr->GetBlock(), if_instr->IfFalseSuccessor())) {
__ b(codegen_->GetLabelOf(if_instr->IfFalseSuccessor()));
}
}
void LocationsBuilderARM::VisitCondition(HCondition* comp) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(comp);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RegisterOrConstant(comp->InputAt(1)));
if (comp->NeedsMaterialization()) {
locations->SetOut(Location::RequiresRegister());
}
comp->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitCondition(HCondition* comp) {
if (!comp->NeedsMaterialization()) return;
LocationSummary* locations = comp->GetLocations();
if (locations->InAt(1).IsRegister()) {
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(),
ShifterOperand(locations->InAt(1).AsArm().AsCoreRegister()));
} else {
DCHECK(locations->InAt(1).IsConstant());
int32_t value = locations->InAt(1).GetConstant()->AsIntConstant()->GetValue();
ShifterOperand operand;
if (ShifterOperand::CanHoldArm(value, &operand)) {
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(value));
} else {
Register temp = IP;
__ LoadImmediate(temp, value);
__ cmp(locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(temp));
}
}
__ it(ARMCondition(comp->GetCondition()), kItElse);
__ mov(locations->Out().AsArm().AsCoreRegister(), ShifterOperand(1),
ARMCondition(comp->GetCondition()));
__ mov(locations->Out().AsArm().AsCoreRegister(), ShifterOperand(0),
ARMOppositeCondition(comp->GetCondition()));
}
void LocationsBuilderARM::VisitEqual(HEqual* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitEqual(HEqual* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitNotEqual(HNotEqual* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitNotEqual(HNotEqual* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitLessThan(HLessThan* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitLessThan(HLessThan* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitLessThanOrEqual(HLessThanOrEqual* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitGreaterThan(HGreaterThan* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitGreaterThan(HGreaterThan* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
VisitCondition(comp);
}
void InstructionCodeGeneratorARM::VisitGreaterThanOrEqual(HGreaterThanOrEqual* comp) {
VisitCondition(comp);
}
void LocationsBuilderARM::VisitLocal(HLocal* local) {
local->SetLocations(nullptr);
}
void InstructionCodeGeneratorARM::VisitLocal(HLocal* local) {
DCHECK_EQ(local->GetBlock(), GetGraph()->GetEntryBlock());
}
void LocationsBuilderARM::VisitLoadLocal(HLoadLocal* load) {
load->SetLocations(nullptr);
}
void InstructionCodeGeneratorARM::VisitLoadLocal(HLoadLocal* load) {
// Nothing to do, this is driven by the code generator.
}
void LocationsBuilderARM::VisitStoreLocal(HStoreLocal* store) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(store);
switch (store->InputAt(1)->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot:
locations->SetInAt(1, Location::StackSlot(codegen_->GetStackSlot(store->GetLocal())));
break;
case Primitive::kPrimLong:
locations->SetInAt(1, Location::DoubleStackSlot(codegen_->GetStackSlot(store->GetLocal())));
break;
default:
LOG(FATAL) << "Unimplemented local type " << store->InputAt(1)->GetType();
}
store->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitStoreLocal(HStoreLocal* store) {
}
void LocationsBuilderARM::VisitIntConstant(HIntConstant* constant) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(constant);
locations->SetOut(Location::ConstantLocation(constant));
constant->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitIntConstant(HIntConstant* constant) {
}
void LocationsBuilderARM::VisitLongConstant(HLongConstant* constant) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(constant);
locations->SetOut(Location::ConstantLocation(constant));
constant->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitLongConstant(HLongConstant* 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);
switch (ret->InputAt(0)->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot:
locations->SetInAt(0, ArmCoreLocation(R0));
break;
case Primitive::kPrimLong:
locations->SetInAt(
0, Location::RegisterLocation(ArmManagedRegister::FromRegisterPair(R0_R1)));
break;
default:
LOG(FATAL) << "Unimplemented return type " << ret->InputAt(0)->GetType();
}
ret->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitReturn(HReturn* ret) {
if (kIsDebugBuild) {
switch (ret->InputAt(0)->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot:
DCHECK_EQ(ret->GetLocations()->InAt(0).AsArm().AsCoreRegister(), R0);
break;
case Primitive::kPrimLong:
DCHECK_EQ(ret->GetLocations()->InAt(0).AsArm().AsRegisterPair(), R0_R1);
break;
default:
LOG(FATAL) << "Unimplemented return type " << ret->InputAt(0)->GetType();
}
}
codegen_->GenerateFrameExit();
}
void LocationsBuilderARM::VisitInvokeStatic(HInvokeStatic* invoke) {
codegen_->MarkNotLeaf();
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(invoke);
locations->AddTemp(ArmCoreLocation(R0));
InvokeDexCallingConventionVisitor calling_convention_visitor;
for (size_t i = 0; i < invoke->InputCount(); i++) {
HInstruction* input = invoke->InputAt(i);
locations->SetInAt(i, calling_convention_visitor.GetNextLocation(input->GetType()));
}
switch (invoke->GetType()) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
case Primitive::kPrimInt:
case Primitive::kPrimNot:
locations->SetOut(ArmCoreLocation(R0));
break;
case Primitive::kPrimLong:
locations->SetOut(Location::RegisterLocation(ArmManagedRegister::FromRegisterPair(R0_R1)));
break;
case Primitive::kPrimVoid:
break;
case Primitive::kPrimDouble:
case Primitive::kPrimFloat:
LOG(FATAL) << "Unimplemented return type " << invoke->GetType();
break;
}
invoke->SetLocations(locations);
}
void InstructionCodeGeneratorARM::LoadCurrentMethod(Register reg) {
__ ldr(reg, Address(SP, kCurrentMethodStackOffset));
}
void InstructionCodeGeneratorARM::VisitInvokeStatic(HInvokeStatic* invoke) {
Register temp = invoke->GetLocations()->GetTemp(0).AsArm().AsCoreRegister();
uint32_t heap_reference_size = sizeof(mirror::HeapReference<mirror::Object>);
size_t index_in_cache = mirror::Array::DataOffset(heap_reference_size).Int32Value() +
invoke->GetIndexInDexCache() * kArmWordSize;
// 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(
kArmPointerSize).Int32Value()));
// LR()
__ blx(LR);
codegen_->RecordPcInfo(invoke->GetDexPc());
DCHECK(!codegen_->IsLeafMethod());
}
void LocationsBuilderARM::VisitAdd(HAdd* add) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(add);
switch (add->GetResultType()) {
case Primitive::kPrimInt:
case Primitive::kPrimLong: {
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RegisterOrConstant(add->InputAt(1)));
locations->SetOut(Location::RequiresRegister());
break;
}
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
LOG(FATAL) << "Unexpected add type " << add->GetResultType();
break;
default:
LOG(FATAL) << "Unimplemented add type " << add->GetResultType();
}
add->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitAdd(HAdd* add) {
LocationSummary* locations = add->GetLocations();
switch (add->GetResultType()) {
case Primitive::kPrimInt:
if (locations->InAt(1).IsRegister()) {
__ add(locations->Out().AsArm().AsCoreRegister(),
locations->InAt(0).AsArm().AsCoreRegister(),
ShifterOperand(locations->InAt(1).AsArm().AsCoreRegister()));
} else {
__ AddConstant(locations->Out().AsArm().AsCoreRegister(),
locations->InAt(0).AsArm().AsCoreRegister(),
locations->InAt(1).GetConstant()->AsIntConstant()->GetValue());
}
break;
case Primitive::kPrimLong:
__ adds(locations->Out().AsArm().AsRegisterPairLow(),
locations->InAt(0).AsArm().AsRegisterPairLow(),
ShifterOperand(locations->InAt(1).AsArm().AsRegisterPairLow()));
__ adc(locations->Out().AsArm().AsRegisterPairHigh(),
locations->InAt(0).AsArm().AsRegisterPairHigh(),
ShifterOperand(locations->InAt(1).AsArm().AsRegisterPairHigh()));
break;
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
LOG(FATAL) << "Unexpected add type " << add->GetResultType();
break;
default:
LOG(FATAL) << "Unimplemented add type " << add->GetResultType();
}
}
void LocationsBuilderARM::VisitSub(HSub* sub) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(sub);
switch (sub->GetResultType()) {
case Primitive::kPrimInt:
case Primitive::kPrimLong: {
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RegisterOrConstant(sub->InputAt(1)));
locations->SetOut(Location::RequiresRegister());
break;
}
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
break;
default:
LOG(FATAL) << "Unimplemented sub type " << sub->GetResultType();
}
sub->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitSub(HSub* sub) {
LocationSummary* locations = sub->GetLocations();
switch (sub->GetResultType()) {
case Primitive::kPrimInt: {
if (locations->InAt(1).IsRegister()) {
__ sub(locations->Out().AsArm().AsCoreRegister(),
locations->InAt(0).AsArm().AsCoreRegister(),
ShifterOperand(locations->InAt(1).AsArm().AsCoreRegister()));
} else {
__ AddConstant(locations->Out().AsArm().AsCoreRegister(),
locations->InAt(0).AsArm().AsCoreRegister(),
-locations->InAt(1).GetConstant()->AsIntConstant()->GetValue());
}
break;
}
case Primitive::kPrimLong:
__ subs(locations->Out().AsArm().AsRegisterPairLow(),
locations->InAt(0).AsArm().AsRegisterPairLow(),
ShifterOperand(locations->InAt(1).AsArm().AsRegisterPairLow()));
__ sbc(locations->Out().AsArm().AsRegisterPairHigh(),
locations->InAt(0).AsArm().AsRegisterPairHigh(),
ShifterOperand(locations->InAt(1).AsArm().AsRegisterPairHigh()));
break;
case Primitive::kPrimBoolean:
case Primitive::kPrimByte:
case Primitive::kPrimChar:
case Primitive::kPrimShort:
LOG(FATAL) << "Unexpected sub type " << sub->GetResultType();
break;
default:
LOG(FATAL) << "Unimplemented sub type " << sub->GetResultType();
}
}
void LocationsBuilderARM::VisitNewInstance(HNewInstance* instruction) {
codegen_->MarkNotLeaf();
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
InvokeRuntimeCallingConvention calling_convention;
locations->AddTemp(ArmCoreLocation(calling_convention.GetRegisterAt(0)));
locations->AddTemp(ArmCoreLocation(calling_convention.GetRegisterAt(1)));
locations->SetOut(ArmCoreLocation(R0));
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitNewInstance(HNewInstance* instruction) {
InvokeRuntimeCallingConvention calling_convention;
LoadCurrentMethod(calling_convention.GetRegisterAt(1));
__ LoadImmediate(calling_convention.GetRegisterAt(0), instruction->GetTypeIndex());
int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAllocObjectWithAccessCheck).Int32Value();
__ ldr(LR, Address(TR, offset));
__ blx(LR);
codegen_->RecordPcInfo(instruction->GetDexPc());
DCHECK(!codegen_->IsLeafMethod());
}
void LocationsBuilderARM::VisitParameterValue(HParameterValue* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
Location location = parameter_visitor_.GetNextLocation(instruction->GetType());
if (location.IsStackSlot()) {
location = Location::StackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
} else if (location.IsDoubleStackSlot()) {
location = Location::DoubleStackSlot(location.GetStackIndex() + codegen_->GetFrameSize());
}
locations->SetOut(location);
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitParameterValue(HParameterValue* instruction) {
// Nothing to do, the parameter is already at its location.
}
void LocationsBuilderARM::VisitNot(HNot* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitNot(HNot* instruction) {
LocationSummary* locations = instruction->GetLocations();
__ eor(locations->Out().AsArm().AsCoreRegister(),
locations->InAt(0).AsArm().AsCoreRegister(), ShifterOperand(1));
}
void LocationsBuilderARM::VisitCompare(HCompare* compare) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(compare);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister());
compare->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitCompare(HCompare* compare) {
Label greater, done;
LocationSummary* locations = compare->GetLocations();
switch (compare->InputAt(0)->GetType()) {
case Primitive::kPrimLong: {
Register output = locations->Out().AsArm().AsCoreRegister();
ArmManagedRegister left = locations->InAt(0).AsArm();
ArmManagedRegister right = locations->InAt(1).AsArm();
Label less, greater, done;
__ cmp(left.AsRegisterPairHigh(),
ShifterOperand(right.AsRegisterPairHigh())); // Signed compare.
__ b(&less, LT);
__ b(&greater, GT);
// Do LoadImmediate before any `cmp`, as LoadImmediate might affect
// the status flags.
__ LoadImmediate(output, 0);
__ cmp(left.AsRegisterPairLow(),
ShifterOperand(right.AsRegisterPairLow())); // Unsigned compare.
__ b(&done, EQ);
__ b(&less, CC);
__ Bind(&greater);
__ LoadImmediate(output, 1);
__ b(&done);
__ Bind(&less);
__ LoadImmediate(output, -1);
__ Bind(&done);
break;
}
default:
LOG(FATAL) << "Unimplemented compare type " << compare->InputAt(0)->GetType();
}
}
void LocationsBuilderARM::VisitPhi(HPhi* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
for (size_t i = 0, e = instruction->InputCount(); i < e; ++i) {
locations->SetInAt(i, Location::Any());
}
locations->SetOut(Location::Any());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitPhi(HPhi* instruction) {
LOG(FATAL) << "Unreachable";
}
void LocationsBuilderARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
// Temporary registers for the write barrier.
if (instruction->InputAt(1)->GetType() == Primitive::kPrimNot) {
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
}
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitInstanceFieldSet(HInstanceFieldSet* instruction) {
LocationSummary* locations = instruction->GetLocations();
Register obj = locations->InAt(0).AsArm().AsCoreRegister();
uint32_t offset = instruction->GetFieldOffset().Uint32Value();
Primitive::Type field_type = instruction->InputAt(1)->GetType();
switch (field_type) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte: {
Register value = locations->InAt(1).AsArm().AsCoreRegister();
__ StoreToOffset(kStoreByte, value, obj, offset);
break;
}
case Primitive::kPrimShort:
case Primitive::kPrimChar: {
Register value = locations->InAt(1).AsArm().AsCoreRegister();
__ StoreToOffset(kStoreHalfword, value, obj, offset);
break;
}
case Primitive::kPrimInt:
case Primitive::kPrimNot: {
Register value = locations->InAt(1).AsArm().AsCoreRegister();
__ StoreToOffset(kStoreWord, value, obj, offset);
if (field_type == Primitive::kPrimNot) {
Register temp = locations->GetTemp(0).AsArm().AsCoreRegister();
Register card = locations->GetTemp(1).AsArm().AsCoreRegister();
codegen_->MarkGCCard(temp, card, obj, value);
}
break;
}
case Primitive::kPrimLong: {
ArmManagedRegister value = locations->InAt(1).AsArm();
__ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow(), obj, offset);
break;
}
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented register type " << field_type;
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable type " << field_type;
}
}
void LocationsBuilderARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitInstanceFieldGet(HInstanceFieldGet* instruction) {
LocationSummary* locations = instruction->GetLocations();
Register obj = locations->InAt(0).AsArm().AsCoreRegister();
uint32_t offset = instruction->GetFieldOffset().Uint32Value();
switch (instruction->GetType()) {
case Primitive::kPrimBoolean: {
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
break;
}
case Primitive::kPrimByte: {
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadSignedByte, out, obj, offset);
break;
}
case Primitive::kPrimShort: {
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
break;
}
case Primitive::kPrimChar: {
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
break;
}
case Primitive::kPrimInt:
case Primitive::kPrimNot: {
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadWord, out, obj, offset);
break;
}
case Primitive::kPrimLong: {
// TODO: support volatile.
ArmManagedRegister out = locations->Out().AsArm();
__ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow(), obj, offset);
break;
}
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable type " << instruction->GetType();
}
}
void LocationsBuilderARM::VisitNullCheck(HNullCheck* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
// TODO: Have a normalization phase that makes this instruction never used.
locations->SetOut(Location::SameAsFirstInput());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitNullCheck(HNullCheck* instruction) {
SlowPathCode* slow_path =
new (GetGraph()->GetArena()) NullCheckSlowPathARM(instruction->GetDexPc());
codegen_->AddSlowPath(slow_path);
LocationSummary* locations = instruction->GetLocations();
Location obj = locations->InAt(0);
DCHECK(obj.Equals(locations->Out()));
if (obj.IsRegister()) {
__ cmp(obj.AsArm().AsCoreRegister(), ShifterOperand(0));
}
__ b(slow_path->GetEntryLabel(), EQ);
}
void LocationsBuilderARM::VisitArrayGet(HArrayGet* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
locations->SetOut(Location::RequiresRegister());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitArrayGet(HArrayGet* instruction) {
LocationSummary* locations = instruction->GetLocations();
Register obj = locations->InAt(0).AsArm().AsCoreRegister();
Location index = locations->InAt(1);
switch (instruction->GetType()) {
case Primitive::kPrimBoolean: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
Register out = locations->Out().AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
__ LoadFromOffset(kLoadUnsignedByte, out, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister()));
__ LoadFromOffset(kLoadUnsignedByte, out, IP, data_offset);
}
break;
}
case Primitive::kPrimByte: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int8_t)).Uint32Value();
Register out = locations->Out().AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
__ LoadFromOffset(kLoadSignedByte, out, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister()));
__ LoadFromOffset(kLoadSignedByte, out, IP, data_offset);
}
break;
}
case Primitive::kPrimShort: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int16_t)).Uint32Value();
Register out = locations->Out().AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
__ LoadFromOffset(kLoadSignedHalfword, out, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_2));
__ LoadFromOffset(kLoadSignedHalfword, out, IP, data_offset);
}
break;
}
case Primitive::kPrimChar: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
Register out = locations->Out().AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
__ LoadFromOffset(kLoadUnsignedHalfword, out, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_2));
__ LoadFromOffset(kLoadUnsignedHalfword, out, IP, data_offset);
}
break;
}
case Primitive::kPrimInt:
case Primitive::kPrimNot: {
DCHECK_EQ(sizeof(mirror::HeapReference<mirror::Object>), sizeof(int32_t));
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
Register out = locations->Out().AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
__ LoadFromOffset(kLoadWord, out, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_4));
__ LoadFromOffset(kLoadWord, out, IP, data_offset);
}
break;
}
case Primitive::kPrimLong: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
ArmManagedRegister out = locations->Out().AsArm();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
__ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow(), obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_8));
__ LoadFromOffset(kLoadWordPair, out.AsRegisterPairLow(), IP, data_offset);
}
break;
}
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable type " << instruction->GetType();
}
}
void LocationsBuilderARM::VisitArraySet(HArraySet* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
Primitive::Type value_type = instruction->InputAt(2)->GetType();
if (value_type == Primitive::kPrimNot) {
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, ArmCoreLocation(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, ArmCoreLocation(calling_convention.GetRegisterAt(1)));
locations->SetInAt(2, ArmCoreLocation(calling_convention.GetRegisterAt(2)));
codegen_->MarkNotLeaf();
} else {
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RegisterOrConstant(instruction->InputAt(1)));
locations->SetInAt(2, Location::RequiresRegister());
}
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitArraySet(HArraySet* instruction) {
LocationSummary* locations = instruction->GetLocations();
Register obj = locations->InAt(0).AsArm().AsCoreRegister();
Location index = locations->InAt(1);
Primitive::Type value_type = instruction->InputAt(2)->GetType();
switch (value_type) {
case Primitive::kPrimBoolean:
case Primitive::kPrimByte: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint8_t)).Uint32Value();
Register value = locations->InAt(2).AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_1) + data_offset;
__ StoreToOffset(kStoreByte, value, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister()));
__ StoreToOffset(kStoreByte, value, IP, data_offset);
}
break;
}
case Primitive::kPrimShort:
case Primitive::kPrimChar: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(uint16_t)).Uint32Value();
Register value = locations->InAt(2).AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_2) + data_offset;
__ StoreToOffset(kStoreHalfword, value, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_2));
__ StoreToOffset(kStoreHalfword, value, IP, data_offset);
}
break;
}
case Primitive::kPrimInt: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int32_t)).Uint32Value();
Register value = locations->InAt(2).AsArm().AsCoreRegister();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_4) + data_offset;
__ StoreToOffset(kStoreWord, value, obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_4));
__ StoreToOffset(kStoreWord, value, IP, data_offset);
}
break;
}
case Primitive::kPrimNot: {
int32_t offset = QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAputObject).Int32Value();
__ ldr(LR, Address(TR, offset));
__ blx(LR);
codegen_->RecordPcInfo(instruction->GetDexPc());
DCHECK(!codegen_->IsLeafMethod());
break;
}
case Primitive::kPrimLong: {
uint32_t data_offset = mirror::Array::DataOffset(sizeof(int64_t)).Uint32Value();
ArmManagedRegister value = locations->InAt(2).AsArm();
if (index.IsConstant()) {
size_t offset = (index.GetConstant()->AsIntConstant()->GetValue() << TIMES_8) + data_offset;
__ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow(), obj, offset);
} else {
__ add(IP, obj, ShifterOperand(index.AsArm().AsCoreRegister(), LSL, TIMES_8));
__ StoreToOffset(kStoreWordPair, value.AsRegisterPairLow(), IP, data_offset);
}
break;
}
case Primitive::kPrimFloat:
case Primitive::kPrimDouble:
LOG(FATAL) << "Unimplemented register type " << instruction->GetType();
case Primitive::kPrimVoid:
LOG(FATAL) << "Unreachable type " << instruction->GetType();
}
}
void LocationsBuilderARM::VisitArrayLength(HArrayLength* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitArrayLength(HArrayLength* instruction) {
LocationSummary* locations = instruction->GetLocations();
uint32_t offset = mirror::Array::LengthOffset().Uint32Value();
Register obj = locations->InAt(0).AsArm().AsCoreRegister();
Register out = locations->Out().AsArm().AsCoreRegister();
__ LoadFromOffset(kLoadWord, out, obj, offset);
}
void LocationsBuilderARM::VisitBoundsCheck(HBoundsCheck* instruction) {
LocationSummary* locations = new (GetGraph()->GetArena()) LocationSummary(instruction);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
// TODO: Have a normalization phase that makes this instruction never used.
locations->SetOut(Location::SameAsFirstInput());
instruction->SetLocations(locations);
}
void InstructionCodeGeneratorARM::VisitBoundsCheck(HBoundsCheck* instruction) {
LocationSummary* locations = instruction->GetLocations();
SlowPathCode* slow_path = new (GetGraph()->GetArena()) BoundsCheckSlowPathARM(
instruction->GetDexPc(), locations->InAt(0), locations->InAt(1));
codegen_->AddSlowPath(slow_path);
Register index = locations->InAt(0).AsArm().AsCoreRegister();
Register length = locations->InAt(1).AsArm().AsCoreRegister();
__ cmp(index, ShifterOperand(length));
__ b(slow_path->GetEntryLabel(), CS);
}
void CodeGeneratorARM::MarkGCCard(Register temp, Register card, Register object, Register value) {
Label is_null;
__ CompareAndBranchIfZero(value, &is_null);
__ LoadFromOffset(kLoadWord, card, TR, Thread::CardTableOffset<kArmWordSize>().Int32Value());
__ Lsr(temp, object, gc::accounting::CardTable::kCardShift);
__ strb(card, Address(card, temp));
__ Bind(&is_null);
}
void LocationsBuilderARM::VisitTemporary(HTemporary* temp) {
temp->SetLocations(nullptr);
}
void InstructionCodeGeneratorARM::VisitTemporary(HTemporary* temp) {
// Nothing to do, this is driven by the code generator.
}
void LocationsBuilderARM::VisitParallelMove(HParallelMove* instruction) {
LOG(FATAL) << "Unreachable";
}
void InstructionCodeGeneratorARM::VisitParallelMove(HParallelMove* instruction) {
codegen_->GetMoveResolver()->EmitNativeCode(instruction);
}
ArmAssembler* ParallelMoveResolverARM::GetAssembler() const {
return codegen_->GetAssembler();
}
void ParallelMoveResolverARM::EmitMove(size_t index) {
MoveOperands* move = moves_.Get(index);
Location source = move->GetSource();
Location destination = move->GetDestination();
if (source.IsRegister()) {
if (destination.IsRegister()) {
__ Mov(destination.AsArm().AsCoreRegister(), source.AsArm().AsCoreRegister());
} else {
DCHECK(destination.IsStackSlot());
__ StoreToOffset(kStoreWord, source.AsArm().AsCoreRegister(),
SP, destination.GetStackIndex());
}
} else if (source.IsStackSlot()) {
if (destination.IsRegister()) {
__ LoadFromOffset(kLoadWord, destination.AsArm().AsCoreRegister(),
SP, source.GetStackIndex());
} else {
DCHECK(destination.IsStackSlot());
__ LoadFromOffset(kLoadWord, IP, SP, source.GetStackIndex());
__ StoreToOffset(kStoreWord, IP, SP, destination.GetStackIndex());
}
} else {
DCHECK(source.IsConstant());
DCHECK(source.GetConstant()->AsIntConstant() != nullptr);
int32_t value = source.GetConstant()->AsIntConstant()->GetValue();
if (destination.IsRegister()) {
__ LoadImmediate(destination.AsArm().AsCoreRegister(), value);
} else {
DCHECK(destination.IsStackSlot());
__ LoadImmediate(IP, value);
__ str(IP, Address(SP, destination.GetStackIndex()));
}
}
}
void ParallelMoveResolverARM::Exchange(Register reg, int mem) {
__ Mov(IP, reg);
__ LoadFromOffset(kLoadWord, reg, SP, mem);
__ StoreToOffset(kStoreWord, IP, SP, mem);
}
void ParallelMoveResolverARM::Exchange(int mem1, int mem2) {
ScratchRegisterScope ensure_scratch(this, IP, R0, codegen_->GetNumberOfCoreRegisters());
int stack_offset = ensure_scratch.IsSpilled() ? kArmWordSize : 0;
__ LoadFromOffset(kLoadWord, static_cast<Register>(ensure_scratch.GetRegister()),
SP, mem1 + stack_offset);
__ LoadFromOffset(kLoadWord, IP, SP, mem2 + stack_offset);
__ StoreToOffset(kStoreWord, static_cast<Register>(ensure_scratch.GetRegister()),
SP, mem2 + stack_offset);
__ StoreToOffset(kStoreWord, IP, SP, mem1 + stack_offset);
}
void ParallelMoveResolverARM::EmitSwap(size_t index) {
MoveOperands* move = moves_.Get(index);
Location source = move->GetSource();
Location destination = move->GetDestination();
if (source.IsRegister() && destination.IsRegister()) {
DCHECK_NE(source.AsArm().AsCoreRegister(), IP);
DCHECK_NE(destination.AsArm().AsCoreRegister(), IP);
__ Mov(IP, source.AsArm().AsCoreRegister());
__ Mov(source.AsArm().AsCoreRegister(), destination.AsArm().AsCoreRegister());
__ Mov(destination.AsArm().AsCoreRegister(), IP);
} else if (source.IsRegister() && destination.IsStackSlot()) {
Exchange(source.AsArm().AsCoreRegister(), destination.GetStackIndex());
} else if (source.IsStackSlot() && destination.IsRegister()) {
Exchange(destination.AsArm().AsCoreRegister(), source.GetStackIndex());
} else if (source.IsStackSlot() && destination.IsStackSlot()) {
Exchange(source.GetStackIndex(), destination.GetStackIndex());
} else {
LOG(FATAL) << "Unimplemented";
}
}
void ParallelMoveResolverARM::SpillScratch(int reg) {
__ Push(static_cast<Register>(reg));
}
void ParallelMoveResolverARM::RestoreScratch(int reg) {
__ Pop(static_cast<Register>(reg));
}
} // namespace arm
} // namespace art