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android_mt6572_jiabo/art/compiler/optimizing/intrinsics_arm64.cc
FuQuan 3ff2876a30 first commit
2025-09-05 16:56:03 +08:00

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/*
* Copyright (C) 2015 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 "intrinsics_arm64.h"
#include "arch/arm64/instruction_set_features_arm64.h"
#include "art_method.h"
#include "code_generator_arm64.h"
#include "common_arm64.h"
#include "entrypoints/quick/quick_entrypoints.h"
#include "intrinsics.h"
#include "mirror/array-inl.h"
#include "mirror/string.h"
#include "thread.h"
#include "utils/arm64/assembler_arm64.h"
#include "utils/arm64/constants_arm64.h"
#include "vixl/a64/disasm-a64.h"
#include "vixl/a64/macro-assembler-a64.h"
using namespace vixl; // NOLINT(build/namespaces)
namespace art {
namespace arm64 {
using helpers::DRegisterFrom;
using helpers::FPRegisterFrom;
using helpers::HeapOperand;
using helpers::LocationFrom;
using helpers::OperandFrom;
using helpers::RegisterFrom;
using helpers::SRegisterFrom;
using helpers::WRegisterFrom;
using helpers::XRegisterFrom;
using helpers::InputRegisterAt;
namespace {
ALWAYS_INLINE inline MemOperand AbsoluteHeapOperandFrom(Location location, size_t offset = 0) {
return MemOperand(XRegisterFrom(location), offset);
}
} // namespace
vixl::MacroAssembler* IntrinsicCodeGeneratorARM64::GetVIXLAssembler() {
return codegen_->GetAssembler()->vixl_masm_;
}
ArenaAllocator* IntrinsicCodeGeneratorARM64::GetAllocator() {
return codegen_->GetGraph()->GetArena();
}
#define __ codegen->GetAssembler()->vixl_masm_->
static void MoveFromReturnRegister(Location trg,
Primitive::Type type,
CodeGeneratorARM64* codegen) {
if (!trg.IsValid()) {
DCHECK(type == Primitive::kPrimVoid);
return;
}
DCHECK_NE(type, Primitive::kPrimVoid);
if (Primitive::IsIntegralType(type) || type == Primitive::kPrimNot) {
Register trg_reg = RegisterFrom(trg, type);
Register res_reg = RegisterFrom(ARM64ReturnLocation(type), type);
__ Mov(trg_reg, res_reg, kDiscardForSameWReg);
} else {
FPRegister trg_reg = FPRegisterFrom(trg, type);
FPRegister res_reg = FPRegisterFrom(ARM64ReturnLocation(type), type);
__ Fmov(trg_reg, res_reg);
}
}
static void MoveArguments(HInvoke* invoke, CodeGeneratorARM64* codegen) {
InvokeDexCallingConventionVisitorARM64 calling_convention_visitor;
IntrinsicVisitor::MoveArguments(invoke, codegen, &calling_convention_visitor);
}
// Slow-path for fallback (calling the managed code to handle the intrinsic) in an intrinsified
// call. This will copy the arguments into the positions for a regular call.
//
// Note: The actual parameters are required to be in the locations given by the invoke's location
// summary. If an intrinsic modifies those locations before a slowpath call, they must be
// restored!
class IntrinsicSlowPathARM64 : public SlowPathCodeARM64 {
public:
explicit IntrinsicSlowPathARM64(HInvoke* invoke)
: SlowPathCodeARM64(invoke), invoke_(invoke) { }
void EmitNativeCode(CodeGenerator* codegen_in) OVERRIDE {
CodeGeneratorARM64* codegen = down_cast<CodeGeneratorARM64*>(codegen_in);
__ Bind(GetEntryLabel());
SaveLiveRegisters(codegen, invoke_->GetLocations());
MoveArguments(invoke_, codegen);
if (invoke_->IsInvokeStaticOrDirect()) {
codegen->GenerateStaticOrDirectCall(invoke_->AsInvokeStaticOrDirect(),
LocationFrom(kArtMethodRegister));
} else {
codegen->GenerateVirtualCall(invoke_->AsInvokeVirtual(), LocationFrom(kArtMethodRegister));
}
codegen->RecordPcInfo(invoke_, invoke_->GetDexPc(), this);
// Copy the result back to the expected output.
Location out = invoke_->GetLocations()->Out();
if (out.IsValid()) {
DCHECK(out.IsRegister()); // TODO: Replace this when we support output in memory.
DCHECK(!invoke_->GetLocations()->GetLiveRegisters()->ContainsCoreRegister(out.reg()));
MoveFromReturnRegister(out, invoke_->GetType(), codegen);
}
RestoreLiveRegisters(codegen, invoke_->GetLocations());
__ B(GetExitLabel());
}
const char* GetDescription() const OVERRIDE { return "IntrinsicSlowPathARM64"; }
private:
// The instruction where this slow path is happening.
HInvoke* const invoke_;
DISALLOW_COPY_AND_ASSIGN(IntrinsicSlowPathARM64);
};
#undef __
bool IntrinsicLocationsBuilderARM64::TryDispatch(HInvoke* invoke) {
Dispatch(invoke);
LocationSummary* res = invoke->GetLocations();
if (res == nullptr) {
return false;
}
if (kEmitCompilerReadBarrier && res->CanCall()) {
// Generating an intrinsic for this HInvoke may produce an
// IntrinsicSlowPathARM64 slow path. Currently this approach
// does not work when using read barriers, as the emitted
// calling sequence will make use of another slow path
// (ReadBarrierForRootSlowPathARM64 for HInvokeStaticOrDirect,
// ReadBarrierSlowPathARM64 for HInvokeVirtual). So we bail
// out in this case.
//
// TODO: Find a way to have intrinsics work with read barriers.
invoke->SetLocations(nullptr);
return false;
}
return res->Intrinsified();
}
#define __ masm->
static void CreateFPToIntLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresFpuRegister());
locations->SetOut(Location::RequiresRegister());
}
static void CreateIntToFPLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresFpuRegister());
}
static void MoveFPToInt(LocationSummary* locations, bool is64bit, vixl::MacroAssembler* masm) {
Location input = locations->InAt(0);
Location output = locations->Out();
__ Fmov(is64bit ? XRegisterFrom(output) : WRegisterFrom(output),
is64bit ? DRegisterFrom(input) : SRegisterFrom(input));
}
static void MoveIntToFP(LocationSummary* locations, bool is64bit, vixl::MacroAssembler* masm) {
Location input = locations->InAt(0);
Location output = locations->Out();
__ Fmov(is64bit ? DRegisterFrom(output) : SRegisterFrom(output),
is64bit ? XRegisterFrom(input) : WRegisterFrom(input));
}
void IntrinsicLocationsBuilderARM64::VisitDoubleDoubleToRawLongBits(HInvoke* invoke) {
CreateFPToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitDoubleLongBitsToDouble(HInvoke* invoke) {
CreateIntToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitDoubleDoubleToRawLongBits(HInvoke* invoke) {
MoveFPToInt(invoke->GetLocations(), /* is64bit */ true, GetVIXLAssembler());
}
void IntrinsicCodeGeneratorARM64::VisitDoubleLongBitsToDouble(HInvoke* invoke) {
MoveIntToFP(invoke->GetLocations(), /* is64bit */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitFloatFloatToRawIntBits(HInvoke* invoke) {
CreateFPToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitFloatIntBitsToFloat(HInvoke* invoke) {
CreateIntToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitFloatFloatToRawIntBits(HInvoke* invoke) {
MoveFPToInt(invoke->GetLocations(), /* is64bit */ false, GetVIXLAssembler());
}
void IntrinsicCodeGeneratorARM64::VisitFloatIntBitsToFloat(HInvoke* invoke) {
MoveIntToFP(invoke->GetLocations(), /* is64bit */ false, GetVIXLAssembler());
}
static void CreateIntToIntLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
}
static void GenReverseBytes(LocationSummary* locations,
Primitive::Type type,
vixl::MacroAssembler* masm) {
Location in = locations->InAt(0);
Location out = locations->Out();
switch (type) {
case Primitive::kPrimShort:
__ Rev16(WRegisterFrom(out), WRegisterFrom(in));
__ Sxth(WRegisterFrom(out), WRegisterFrom(out));
break;
case Primitive::kPrimInt:
case Primitive::kPrimLong:
__ Rev(RegisterFrom(out, type), RegisterFrom(in, type));
break;
default:
LOG(FATAL) << "Unexpected size for reverse-bytes: " << type;
UNREACHABLE();
}
}
void IntrinsicLocationsBuilderARM64::VisitIntegerReverseBytes(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitIntegerReverseBytes(HInvoke* invoke) {
GenReverseBytes(invoke->GetLocations(), Primitive::kPrimInt, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitLongReverseBytes(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitLongReverseBytes(HInvoke* invoke) {
GenReverseBytes(invoke->GetLocations(), Primitive::kPrimLong, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitShortReverseBytes(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitShortReverseBytes(HInvoke* invoke) {
GenReverseBytes(invoke->GetLocations(), Primitive::kPrimShort, GetVIXLAssembler());
}
static void CreateIntIntToIntLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
}
static void GenNumberOfLeadingZeros(LocationSummary* locations,
Primitive::Type type,
vixl::MacroAssembler* masm) {
DCHECK(type == Primitive::kPrimInt || type == Primitive::kPrimLong);
Location in = locations->InAt(0);
Location out = locations->Out();
__ Clz(RegisterFrom(out, type), RegisterFrom(in, type));
}
void IntrinsicLocationsBuilderARM64::VisitIntegerNumberOfLeadingZeros(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitIntegerNumberOfLeadingZeros(HInvoke* invoke) {
GenNumberOfLeadingZeros(invoke->GetLocations(), Primitive::kPrimInt, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitLongNumberOfLeadingZeros(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitLongNumberOfLeadingZeros(HInvoke* invoke) {
GenNumberOfLeadingZeros(invoke->GetLocations(), Primitive::kPrimLong, GetVIXLAssembler());
}
static void GenNumberOfTrailingZeros(LocationSummary* locations,
Primitive::Type type,
vixl::MacroAssembler* masm) {
DCHECK(type == Primitive::kPrimInt || type == Primitive::kPrimLong);
Location in = locations->InAt(0);
Location out = locations->Out();
__ Rbit(RegisterFrom(out, type), RegisterFrom(in, type));
__ Clz(RegisterFrom(out, type), RegisterFrom(out, type));
}
void IntrinsicLocationsBuilderARM64::VisitIntegerNumberOfTrailingZeros(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitIntegerNumberOfTrailingZeros(HInvoke* invoke) {
GenNumberOfTrailingZeros(invoke->GetLocations(), Primitive::kPrimInt, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitLongNumberOfTrailingZeros(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitLongNumberOfTrailingZeros(HInvoke* invoke) {
GenNumberOfTrailingZeros(invoke->GetLocations(), Primitive::kPrimLong, GetVIXLAssembler());
}
static void GenReverse(LocationSummary* locations,
Primitive::Type type,
vixl::MacroAssembler* masm) {
DCHECK(type == Primitive::kPrimInt || type == Primitive::kPrimLong);
Location in = locations->InAt(0);
Location out = locations->Out();
__ Rbit(RegisterFrom(out, type), RegisterFrom(in, type));
}
void IntrinsicLocationsBuilderARM64::VisitIntegerReverse(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitIntegerReverse(HInvoke* invoke) {
GenReverse(invoke->GetLocations(), Primitive::kPrimInt, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitLongReverse(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitLongReverse(HInvoke* invoke) {
GenReverse(invoke->GetLocations(), Primitive::kPrimLong, GetVIXLAssembler());
}
static void GenBitCount(HInvoke* instr, Primitive::Type type, vixl::MacroAssembler* masm) {
DCHECK(Primitive::IsIntOrLongType(type)) << type;
DCHECK_EQ(instr->GetType(), Primitive::kPrimInt);
DCHECK_EQ(Primitive::PrimitiveKind(instr->InputAt(0)->GetType()), type);
UseScratchRegisterScope temps(masm);
Register src = InputRegisterAt(instr, 0);
Register dst = RegisterFrom(instr->GetLocations()->Out(), type);
FPRegister fpr = (type == Primitive::kPrimLong) ? temps.AcquireD() : temps.AcquireS();
__ Fmov(fpr, src);
__ Cnt(fpr.V8B(), fpr.V8B());
__ Addv(fpr.B(), fpr.V8B());
__ Fmov(dst, fpr);
}
void IntrinsicLocationsBuilderARM64::VisitLongBitCount(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitLongBitCount(HInvoke* invoke) {
GenBitCount(invoke, Primitive::kPrimLong, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitIntegerBitCount(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitIntegerBitCount(HInvoke* invoke) {
GenBitCount(invoke, Primitive::kPrimInt, GetVIXLAssembler());
}
static void CreateFPToFPLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresFpuRegister());
locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
}
static void MathAbsFP(LocationSummary* locations, bool is64bit, vixl::MacroAssembler* masm) {
Location in = locations->InAt(0);
Location out = locations->Out();
FPRegister in_reg = is64bit ? DRegisterFrom(in) : SRegisterFrom(in);
FPRegister out_reg = is64bit ? DRegisterFrom(out) : SRegisterFrom(out);
__ Fabs(out_reg, in_reg);
}
void IntrinsicLocationsBuilderARM64::VisitMathAbsDouble(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAbsDouble(HInvoke* invoke) {
MathAbsFP(invoke->GetLocations(), /* is64bit */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathAbsFloat(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAbsFloat(HInvoke* invoke) {
MathAbsFP(invoke->GetLocations(), /* is64bit */ false, GetVIXLAssembler());
}
static void CreateIntToInt(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
}
static void GenAbsInteger(LocationSummary* locations,
bool is64bit,
vixl::MacroAssembler* masm) {
Location in = locations->InAt(0);
Location output = locations->Out();
Register in_reg = is64bit ? XRegisterFrom(in) : WRegisterFrom(in);
Register out_reg = is64bit ? XRegisterFrom(output) : WRegisterFrom(output);
__ Cmp(in_reg, Operand(0));
__ Cneg(out_reg, in_reg, lt);
}
void IntrinsicLocationsBuilderARM64::VisitMathAbsInt(HInvoke* invoke) {
CreateIntToInt(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAbsInt(HInvoke* invoke) {
GenAbsInteger(invoke->GetLocations(), /* is64bit */ false, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathAbsLong(HInvoke* invoke) {
CreateIntToInt(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAbsLong(HInvoke* invoke) {
GenAbsInteger(invoke->GetLocations(), /* is64bit */ true, GetVIXLAssembler());
}
static void GenMinMaxFP(LocationSummary* locations,
bool is_min,
bool is_double,
vixl::MacroAssembler* masm) {
Location op1 = locations->InAt(0);
Location op2 = locations->InAt(1);
Location out = locations->Out();
FPRegister op1_reg = is_double ? DRegisterFrom(op1) : SRegisterFrom(op1);
FPRegister op2_reg = is_double ? DRegisterFrom(op2) : SRegisterFrom(op2);
FPRegister out_reg = is_double ? DRegisterFrom(out) : SRegisterFrom(out);
if (is_min) {
__ Fmin(out_reg, op1_reg, op2_reg);
} else {
__ Fmax(out_reg, op1_reg, op2_reg);
}
}
static void CreateFPFPToFPLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresFpuRegister());
locations->SetInAt(1, Location::RequiresFpuRegister());
locations->SetOut(Location::RequiresFpuRegister(), Location::kNoOutputOverlap);
}
void IntrinsicLocationsBuilderARM64::VisitMathMinDoubleDouble(HInvoke* invoke) {
CreateFPFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMinDoubleDouble(HInvoke* invoke) {
GenMinMaxFP(invoke->GetLocations(), /* is_min */ true, /* is_double */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMinFloatFloat(HInvoke* invoke) {
CreateFPFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMinFloatFloat(HInvoke* invoke) {
GenMinMaxFP(invoke->GetLocations(), /* is_min */ true, /* is_double */ false, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMaxDoubleDouble(HInvoke* invoke) {
CreateFPFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMaxDoubleDouble(HInvoke* invoke) {
GenMinMaxFP(invoke->GetLocations(), /* is_min */ false, /* is_double */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMaxFloatFloat(HInvoke* invoke) {
CreateFPFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMaxFloatFloat(HInvoke* invoke) {
GenMinMaxFP(
invoke->GetLocations(), /* is_min */ false, /* is_double */ false, GetVIXLAssembler());
}
static void GenMinMax(LocationSummary* locations,
bool is_min,
bool is_long,
vixl::MacroAssembler* masm) {
Location op1 = locations->InAt(0);
Location op2 = locations->InAt(1);
Location out = locations->Out();
Register op1_reg = is_long ? XRegisterFrom(op1) : WRegisterFrom(op1);
Register op2_reg = is_long ? XRegisterFrom(op2) : WRegisterFrom(op2);
Register out_reg = is_long ? XRegisterFrom(out) : WRegisterFrom(out);
__ Cmp(op1_reg, op2_reg);
__ Csel(out_reg, op1_reg, op2_reg, is_min ? lt : gt);
}
void IntrinsicLocationsBuilderARM64::VisitMathMinIntInt(HInvoke* invoke) {
CreateIntIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMinIntInt(HInvoke* invoke) {
GenMinMax(invoke->GetLocations(), /* is_min */ true, /* is_long */ false, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMinLongLong(HInvoke* invoke) {
CreateIntIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMinLongLong(HInvoke* invoke) {
GenMinMax(invoke->GetLocations(), /* is_min */ true, /* is_long */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMaxIntInt(HInvoke* invoke) {
CreateIntIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMaxIntInt(HInvoke* invoke) {
GenMinMax(invoke->GetLocations(), /* is_min */ false, /* is_long */ false, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathMaxLongLong(HInvoke* invoke) {
CreateIntIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathMaxLongLong(HInvoke* invoke) {
GenMinMax(invoke->GetLocations(), /* is_min */ false, /* is_long */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathSqrt(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathSqrt(HInvoke* invoke) {
LocationSummary* locations = invoke->GetLocations();
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Fsqrt(DRegisterFrom(locations->Out()), DRegisterFrom(locations->InAt(0)));
}
void IntrinsicLocationsBuilderARM64::VisitMathCeil(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathCeil(HInvoke* invoke) {
LocationSummary* locations = invoke->GetLocations();
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Frintp(DRegisterFrom(locations->Out()), DRegisterFrom(locations->InAt(0)));
}
void IntrinsicLocationsBuilderARM64::VisitMathFloor(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathFloor(HInvoke* invoke) {
LocationSummary* locations = invoke->GetLocations();
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Frintm(DRegisterFrom(locations->Out()), DRegisterFrom(locations->InAt(0)));
}
void IntrinsicLocationsBuilderARM64::VisitMathRint(HInvoke* invoke) {
CreateFPToFPLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathRint(HInvoke* invoke) {
LocationSummary* locations = invoke->GetLocations();
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Frintn(DRegisterFrom(locations->Out()), DRegisterFrom(locations->InAt(0)));
}
static void CreateFPToIntPlusTempLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresFpuRegister());
locations->SetOut(Location::RequiresRegister());
}
static void GenMathRound(LocationSummary* locations,
bool is_double,
vixl::MacroAssembler* masm) {
FPRegister in_reg = is_double ?
DRegisterFrom(locations->InAt(0)) : SRegisterFrom(locations->InAt(0));
Register out_reg = is_double ?
XRegisterFrom(locations->Out()) : WRegisterFrom(locations->Out());
UseScratchRegisterScope temps(masm);
FPRegister temp1_reg = temps.AcquireSameSizeAs(in_reg);
// 0.5 can be encoded as an immediate, so use fmov.
if (is_double) {
__ Fmov(temp1_reg, static_cast<double>(0.5));
} else {
__ Fmov(temp1_reg, static_cast<float>(0.5));
}
__ Fadd(temp1_reg, in_reg, temp1_reg);
__ Fcvtms(out_reg, temp1_reg);
}
void IntrinsicLocationsBuilderARM64::VisitMathRoundDouble(HInvoke* invoke) {
// See intrinsics.h.
if (kRoundIsPlusPointFive) {
CreateFPToIntPlusTempLocations(arena_, invoke);
}
}
void IntrinsicCodeGeneratorARM64::VisitMathRoundDouble(HInvoke* invoke) {
GenMathRound(invoke->GetLocations(), /* is_double */ true, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMathRoundFloat(HInvoke* invoke) {
// See intrinsics.h.
if (kRoundIsPlusPointFive) {
CreateFPToIntPlusTempLocations(arena_, invoke);
}
}
void IntrinsicCodeGeneratorARM64::VisitMathRoundFloat(HInvoke* invoke) {
GenMathRound(invoke->GetLocations(), /* is_double */ false, GetVIXLAssembler());
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPeekByte(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPeekByte(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Ldrsb(WRegisterFrom(invoke->GetLocations()->Out()),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPeekIntNative(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPeekIntNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Ldr(WRegisterFrom(invoke->GetLocations()->Out()),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPeekLongNative(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPeekLongNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Ldr(XRegisterFrom(invoke->GetLocations()->Out()),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPeekShortNative(HInvoke* invoke) {
CreateIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPeekShortNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Ldrsh(WRegisterFrom(invoke->GetLocations()->Out()),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
static void CreateIntIntToVoidLocations(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPokeByte(HInvoke* invoke) {
CreateIntIntToVoidLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPokeByte(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Strb(WRegisterFrom(invoke->GetLocations()->InAt(1)),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPokeIntNative(HInvoke* invoke) {
CreateIntIntToVoidLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPokeIntNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Str(WRegisterFrom(invoke->GetLocations()->InAt(1)),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPokeLongNative(HInvoke* invoke) {
CreateIntIntToVoidLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPokeLongNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Str(XRegisterFrom(invoke->GetLocations()->InAt(1)),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitMemoryPokeShortNative(HInvoke* invoke) {
CreateIntIntToVoidLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMemoryPokeShortNative(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
__ Strh(WRegisterFrom(invoke->GetLocations()->InAt(1)),
AbsoluteHeapOperandFrom(invoke->GetLocations()->InAt(0), 0));
}
void IntrinsicLocationsBuilderARM64::VisitThreadCurrentThread(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetOut(Location::RequiresRegister());
}
void IntrinsicCodeGeneratorARM64::VisitThreadCurrentThread(HInvoke* invoke) {
codegen_->Load(Primitive::kPrimNot, WRegisterFrom(invoke->GetLocations()->Out()),
MemOperand(tr, Thread::PeerOffset<8>().Int32Value()));
}
static void GenUnsafeGet(HInvoke* invoke,
Primitive::Type type,
bool is_volatile,
CodeGeneratorARM64* codegen) {
LocationSummary* locations = invoke->GetLocations();
DCHECK((type == Primitive::kPrimInt) ||
(type == Primitive::kPrimLong) ||
(type == Primitive::kPrimNot));
vixl::MacroAssembler* masm = codegen->GetAssembler()->vixl_masm_;
Location base_loc = locations->InAt(1);
Register base = WRegisterFrom(base_loc); // Object pointer.
Location offset_loc = locations->InAt(2);
Register offset = XRegisterFrom(offset_loc); // Long offset.
Location trg_loc = locations->Out();
Register trg = RegisterFrom(trg_loc, type);
if (type == Primitive::kPrimNot && kEmitCompilerReadBarrier && kUseBakerReadBarrier) {
// UnsafeGetObject/UnsafeGetObjectVolatile with Baker's read barrier case.
UseScratchRegisterScope temps(masm);
Register temp = temps.AcquireW();
codegen->GenerateArrayLoadWithBakerReadBarrier(
invoke, trg_loc, base, 0U, offset_loc, temp, /* needs_null_check */ false);
} else {
// Other cases.
MemOperand mem_op(base.X(), offset);
if (is_volatile) {
codegen->LoadAcquire(invoke, trg, mem_op, /* needs_null_check */ true);
} else {
codegen->Load(type, trg, mem_op);
}
if (type == Primitive::kPrimNot) {
DCHECK(trg.IsW());
codegen->MaybeGenerateReadBarrierSlow(invoke, trg_loc, trg_loc, base_loc, 0U, offset_loc);
}
}
}
static void CreateIntIntIntToIntLocations(ArenaAllocator* arena, HInvoke* invoke) {
bool can_call = kEmitCompilerReadBarrier &&
(invoke->GetIntrinsic() == Intrinsics::kUnsafeGetObject ||
invoke->GetIntrinsic() == Intrinsics::kUnsafeGetObjectVolatile);
LocationSummary* locations = new (arena) LocationSummary(invoke,
can_call ?
LocationSummary::kCallOnSlowPath :
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::NoLocation()); // Unused receiver.
locations->SetInAt(1, Location::RequiresRegister());
locations->SetInAt(2, Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGet(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGetVolatile(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGetLong(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGetLongVolatile(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGetObject(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeGetObjectVolatile(HInvoke* invoke) {
CreateIntIntIntToIntLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGet(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimInt, /* is_volatile */ false, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGetVolatile(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimInt, /* is_volatile */ true, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGetLong(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimLong, /* is_volatile */ false, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGetLongVolatile(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimLong, /* is_volatile */ true, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGetObject(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimNot, /* is_volatile */ false, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeGetObjectVolatile(HInvoke* invoke) {
GenUnsafeGet(invoke, Primitive::kPrimNot, /* is_volatile */ true, codegen_);
}
static void CreateIntIntIntIntToVoid(ArenaAllocator* arena, HInvoke* invoke) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::NoLocation()); // Unused receiver.
locations->SetInAt(1, Location::RequiresRegister());
locations->SetInAt(2, Location::RequiresRegister());
locations->SetInAt(3, Location::RequiresRegister());
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePut(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutOrdered(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutVolatile(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutObject(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutObjectOrdered(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutObjectVolatile(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutLong(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutLongOrdered(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafePutLongVolatile(HInvoke* invoke) {
CreateIntIntIntIntToVoid(arena_, invoke);
}
static void GenUnsafePut(LocationSummary* locations,
Primitive::Type type,
bool is_volatile,
bool is_ordered,
CodeGeneratorARM64* codegen) {
vixl::MacroAssembler* masm = codegen->GetAssembler()->vixl_masm_;
Register base = WRegisterFrom(locations->InAt(1)); // Object pointer.
Register offset = XRegisterFrom(locations->InAt(2)); // Long offset.
Register value = RegisterFrom(locations->InAt(3), type);
Register source = value;
MemOperand mem_op(base.X(), offset);
{
// We use a block to end the scratch scope before the write barrier, thus
// freeing the temporary registers so they can be used in `MarkGCCard`.
UseScratchRegisterScope temps(masm);
if (kPoisonHeapReferences && type == Primitive::kPrimNot) {
DCHECK(value.IsW());
Register temp = temps.AcquireW();
__ Mov(temp.W(), value.W());
codegen->GetAssembler()->PoisonHeapReference(temp.W());
source = temp;
}
if (is_volatile || is_ordered) {
codegen->StoreRelease(type, source, mem_op);
} else {
codegen->Store(type, source, mem_op);
}
}
if (type == Primitive::kPrimNot) {
bool value_can_be_null = true; // TODO: Worth finding out this information?
codegen->MarkGCCard(base, value, value_can_be_null);
}
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePut(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimInt,
/* is_volatile */ false,
/* is_ordered */ false,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutOrdered(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimInt,
/* is_volatile */ false,
/* is_ordered */ true,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutVolatile(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimInt,
/* is_volatile */ true,
/* is_ordered */ false,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutObject(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimNot,
/* is_volatile */ false,
/* is_ordered */ false,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutObjectOrdered(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimNot,
/* is_volatile */ false,
/* is_ordered */ true,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutObjectVolatile(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimNot,
/* is_volatile */ true,
/* is_ordered */ false,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutLong(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimLong,
/* is_volatile */ false,
/* is_ordered */ false,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutLongOrdered(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimLong,
/* is_volatile */ false,
/* is_ordered */ true,
codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafePutLongVolatile(HInvoke* invoke) {
GenUnsafePut(invoke->GetLocations(),
Primitive::kPrimLong,
/* is_volatile */ true,
/* is_ordered */ false,
codegen_);
}
static void CreateIntIntIntIntIntToInt(ArenaAllocator* arena,
HInvoke* invoke,
Primitive::Type type) {
LocationSummary* locations = new (arena) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::NoLocation()); // Unused receiver.
locations->SetInAt(1, Location::RequiresRegister());
locations->SetInAt(2, Location::RequiresRegister());
locations->SetInAt(3, Location::RequiresRegister());
locations->SetInAt(4, Location::RequiresRegister());
// If heap poisoning is enabled, we don't want the unpoisoning
// operations to potentially clobber the output.
Location::OutputOverlap overlaps = (kPoisonHeapReferences && type == Primitive::kPrimNot)
? Location::kOutputOverlap
: Location::kNoOutputOverlap;
locations->SetOut(Location::RequiresRegister(), overlaps);
}
static void GenCas(LocationSummary* locations, Primitive::Type type, CodeGeneratorARM64* codegen) {
vixl::MacroAssembler* masm = codegen->GetAssembler()->vixl_masm_;
Register out = WRegisterFrom(locations->Out()); // Boolean result.
Register base = WRegisterFrom(locations->InAt(1)); // Object pointer.
Register offset = XRegisterFrom(locations->InAt(2)); // Long offset.
Register expected = RegisterFrom(locations->InAt(3), type); // Expected.
Register value = RegisterFrom(locations->InAt(4), type); // Value.
// This needs to be before the temp registers, as MarkGCCard also uses VIXL temps.
if (type == Primitive::kPrimNot) {
// Mark card for object assuming new value is stored.
bool value_can_be_null = true; // TODO: Worth finding out this information?
codegen->MarkGCCard(base, value, value_can_be_null);
}
UseScratchRegisterScope temps(masm);
Register tmp_ptr = temps.AcquireX(); // Pointer to actual memory.
Register tmp_value = temps.AcquireSameSizeAs(value); // Value in memory.
Register tmp_32 = tmp_value.W();
__ Add(tmp_ptr, base.X(), Operand(offset));
if (kPoisonHeapReferences && type == Primitive::kPrimNot) {
codegen->GetAssembler()->PoisonHeapReference(expected);
if (value.Is(expected)) {
// Do not poison `value`, as it is the same register as
// `expected`, which has just been poisoned.
} else {
codegen->GetAssembler()->PoisonHeapReference(value);
}
}
// do {
// tmp_value = [tmp_ptr] - expected;
// } while (tmp_value == 0 && failure([tmp_ptr] <- r_new_value));
// result = tmp_value != 0;
vixl::Label loop_head, exit_loop;
__ Bind(&loop_head);
// TODO: When `type == Primitive::kPrimNot`, add a read barrier for
// the reference stored in the object before attempting the CAS,
// similar to the one in the art::Unsafe_compareAndSwapObject JNI
// implementation.
//
// Note that this code is not (yet) used when read barriers are
// enabled (see IntrinsicLocationsBuilderARM64::VisitUnsafeCASObject).
DCHECK(!(type == Primitive::kPrimNot && kEmitCompilerReadBarrier));
__ Ldaxr(tmp_value, MemOperand(tmp_ptr));
__ Cmp(tmp_value, expected);
__ B(&exit_loop, ne);
__ Stlxr(tmp_32, value, MemOperand(tmp_ptr));
__ Cbnz(tmp_32, &loop_head);
__ Bind(&exit_loop);
__ Cset(out, eq);
if (kPoisonHeapReferences && type == Primitive::kPrimNot) {
codegen->GetAssembler()->UnpoisonHeapReference(expected);
if (value.Is(expected)) {
// Do not unpoison `value`, as it is the same register as
// `expected`, which has just been unpoisoned.
} else {
codegen->GetAssembler()->UnpoisonHeapReference(value);
}
}
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeCASInt(HInvoke* invoke) {
CreateIntIntIntIntIntToInt(arena_, invoke, Primitive::kPrimInt);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeCASLong(HInvoke* invoke) {
CreateIntIntIntIntIntToInt(arena_, invoke, Primitive::kPrimLong);
}
void IntrinsicLocationsBuilderARM64::VisitUnsafeCASObject(HInvoke* invoke) {
// The UnsafeCASObject intrinsic is missing a read barrier, and
// therefore sometimes does not work as expected (b/25883050).
// Turn it off temporarily as a quick fix, until the read barrier is
// implemented (see TODO in GenCAS below).
//
// TODO(rpl): Fix this issue and re-enable this intrinsic with read barriers.
if (kEmitCompilerReadBarrier) {
return;
}
CreateIntIntIntIntIntToInt(arena_, invoke, Primitive::kPrimNot);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeCASInt(HInvoke* invoke) {
GenCas(invoke->GetLocations(), Primitive::kPrimInt, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeCASLong(HInvoke* invoke) {
GenCas(invoke->GetLocations(), Primitive::kPrimLong, codegen_);
}
void IntrinsicCodeGeneratorARM64::VisitUnsafeCASObject(HInvoke* invoke) {
GenCas(invoke->GetLocations(), Primitive::kPrimNot, codegen_);
}
void IntrinsicLocationsBuilderARM64::VisitStringCharAt(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCallOnSlowPath,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
// In case we need to go in the slow path, we can't have the output be the same
// as the input: the current liveness analysis considers the input to be live
// at the point of the call.
locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
}
void IntrinsicCodeGeneratorARM64::VisitStringCharAt(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
// Location of reference to data array
const MemberOffset value_offset = mirror::String::ValueOffset();
// Location of count
const MemberOffset count_offset = mirror::String::CountOffset();
Register obj = WRegisterFrom(locations->InAt(0)); // String object pointer.
Register idx = WRegisterFrom(locations->InAt(1)); // Index of character.
Register out = WRegisterFrom(locations->Out()); // Result character.
UseScratchRegisterScope temps(masm);
Register temp = temps.AcquireW();
Register array_temp = temps.AcquireW(); // We can trade this for worse scheduling.
// TODO: Maybe we can support range check elimination. Overall, though, I think it's not worth
// the cost.
// TODO: For simplicity, the index parameter is requested in a register, so different from Quick
// we will not optimize the code for constants (which would save a register).
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
__ Ldr(temp, HeapOperand(obj, count_offset)); // temp = str.length.
codegen_->MaybeRecordImplicitNullCheck(invoke);
__ Cmp(idx, temp);
__ B(hs, slow_path->GetEntryLabel());
__ Add(array_temp, obj, Operand(value_offset.Int32Value())); // array_temp := str.value.
// Load the value.
__ Ldrh(out, MemOperand(array_temp.X(), idx, UXTW, 1)); // out := array_temp[idx].
__ Bind(slow_path->GetExitLabel());
}
void IntrinsicLocationsBuilderARM64::VisitStringCompareTo(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimInt));
}
void IntrinsicCodeGeneratorARM64::VisitStringCompareTo(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
// Note that the null check must have been done earlier.
DCHECK(!invoke->CanDoImplicitNullCheckOn(invoke->InputAt(0)));
Register argument = WRegisterFrom(locations->InAt(1));
__ Cmp(argument, 0);
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
__ B(eq, slow_path->GetEntryLabel());
__ Ldr(
lr, MemOperand(tr, QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, pStringCompareTo).Int32Value()));
__ Blr(lr);
__ Bind(slow_path->GetExitLabel());
}
void IntrinsicLocationsBuilderARM64::VisitStringEquals(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
// Temporary registers to store lengths of strings and for calculations.
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
}
void IntrinsicCodeGeneratorARM64::VisitStringEquals(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
Register str = WRegisterFrom(locations->InAt(0));
Register arg = WRegisterFrom(locations->InAt(1));
Register out = XRegisterFrom(locations->Out());
UseScratchRegisterScope scratch_scope(masm);
Register temp = scratch_scope.AcquireW();
Register temp1 = WRegisterFrom(locations->GetTemp(0));
Register temp2 = WRegisterFrom(locations->GetTemp(1));
vixl::Label loop;
vixl::Label end;
vixl::Label return_true;
vixl::Label return_false;
// Get offsets of count, value, and class fields within a string object.
const int32_t count_offset = mirror::String::CountOffset().Int32Value();
const int32_t value_offset = mirror::String::ValueOffset().Int32Value();
const int32_t class_offset = mirror::Object::ClassOffset().Int32Value();
// Note that the null check must have been done earlier.
DCHECK(!invoke->CanDoImplicitNullCheckOn(invoke->InputAt(0)));
// Check if input is null, return false if it is.
__ Cbz(arg, &return_false);
// Reference equality check, return true if same reference.
__ Cmp(str, arg);
__ B(&return_true, eq);
// Instanceof check for the argument by comparing class fields.
// All string objects must have the same type since String cannot be subclassed.
// Receiver must be a string object, so its class field is equal to all strings' class fields.
// If the argument is a string object, its class field must be equal to receiver's class field.
__ Ldr(temp, MemOperand(str.X(), class_offset));
__ Ldr(temp1, MemOperand(arg.X(), class_offset));
__ Cmp(temp, temp1);
__ B(&return_false, ne);
// Load lengths of this and argument strings.
__ Ldr(temp, MemOperand(str.X(), count_offset));
__ Ldr(temp1, MemOperand(arg.X(), count_offset));
// Check if lengths are equal, return false if they're not.
__ Cmp(temp, temp1);
__ B(&return_false, ne);
// Store offset of string value in preparation for comparison loop
__ Mov(temp1, value_offset);
// Return true if both strings are empty.
__ Cbz(temp, &return_true);
// Assertions that must hold in order to compare strings 4 characters at a time.
DCHECK_ALIGNED(value_offset, 8);
static_assert(IsAligned<8>(kObjectAlignment), "String of odd length is not zero padded");
temp1 = temp1.X();
temp2 = temp2.X();
// Loop to compare strings 4 characters at a time starting at the beginning of the string.
// Ok to do this because strings are zero-padded to be 8-byte aligned.
__ Bind(&loop);
__ Ldr(out, MemOperand(str.X(), temp1));
__ Ldr(temp2, MemOperand(arg.X(), temp1));
__ Add(temp1, temp1, Operand(sizeof(uint64_t)));
__ Cmp(out, temp2);
__ B(&return_false, ne);
__ Sub(temp, temp, Operand(4), SetFlags);
__ B(&loop, gt);
// Return true and exit the function.
// If loop does not result in returning false, we return true.
__ Bind(&return_true);
__ Mov(out, 1);
__ B(&end);
// Return false and exit the function.
__ Bind(&return_false);
__ Mov(out, 0);
__ Bind(&end);
}
static void GenerateVisitStringIndexOf(HInvoke* invoke,
vixl::MacroAssembler* masm,
CodeGeneratorARM64* codegen,
ArenaAllocator* allocator,
bool start_at_zero) {
LocationSummary* locations = invoke->GetLocations();
Register tmp_reg = WRegisterFrom(locations->GetTemp(0));
// Note that the null check must have been done earlier.
DCHECK(!invoke->CanDoImplicitNullCheckOn(invoke->InputAt(0)));
// Check for code points > 0xFFFF. Either a slow-path check when we don't know statically,
// or directly dispatch if we have a constant.
SlowPathCodeARM64* slow_path = nullptr;
if (invoke->InputAt(1)->IsIntConstant()) {
if (static_cast<uint32_t>(invoke->InputAt(1)->AsIntConstant()->GetValue()) > 0xFFFFU) {
// Always needs the slow-path. We could directly dispatch to it, but this case should be
// rare, so for simplicity just put the full slow-path down and branch unconditionally.
slow_path = new (allocator) IntrinsicSlowPathARM64(invoke);
codegen->AddSlowPath(slow_path);
__ B(slow_path->GetEntryLabel());
__ Bind(slow_path->GetExitLabel());
return;
}
} else {
Register char_reg = WRegisterFrom(locations->InAt(1));
__ Mov(tmp_reg, 0xFFFF);
__ Cmp(char_reg, Operand(tmp_reg));
slow_path = new (allocator) IntrinsicSlowPathARM64(invoke);
codegen->AddSlowPath(slow_path);
__ B(hi, slow_path->GetEntryLabel());
}
if (start_at_zero) {
// Start-index = 0.
__ Mov(tmp_reg, 0);
}
__ Ldr(lr, MemOperand(tr, QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, pIndexOf).Int32Value()));
CheckEntrypointTypes<kQuickIndexOf, int32_t, void*, uint32_t, uint32_t>();
__ Blr(lr);
if (slow_path != nullptr) {
__ Bind(slow_path->GetExitLabel());
}
}
void IntrinsicLocationsBuilderARM64::VisitStringIndexOf(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
// We have a hand-crafted assembly stub that follows the runtime calling convention. So it's
// best to align the inputs accordingly.
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimInt));
// Need a temp for slow-path codepoint compare, and need to send start_index=0.
locations->AddTemp(LocationFrom(calling_convention.GetRegisterAt(2)));
}
void IntrinsicCodeGeneratorARM64::VisitStringIndexOf(HInvoke* invoke) {
GenerateVisitStringIndexOf(
invoke, GetVIXLAssembler(), codegen_, GetAllocator(), /* start_at_zero */ true);
}
void IntrinsicLocationsBuilderARM64::VisitStringIndexOfAfter(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
// We have a hand-crafted assembly stub that follows the runtime calling convention. So it's
// best to align the inputs accordingly.
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
locations->SetInAt(2, LocationFrom(calling_convention.GetRegisterAt(2)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimInt));
// Need a temp for slow-path codepoint compare.
locations->AddTemp(Location::RequiresRegister());
}
void IntrinsicCodeGeneratorARM64::VisitStringIndexOfAfter(HInvoke* invoke) {
GenerateVisitStringIndexOf(
invoke, GetVIXLAssembler(), codegen_, GetAllocator(), /* start_at_zero */ false);
}
void IntrinsicLocationsBuilderARM64::VisitStringNewStringFromBytes(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
locations->SetInAt(2, LocationFrom(calling_convention.GetRegisterAt(2)));
locations->SetInAt(3, LocationFrom(calling_convention.GetRegisterAt(3)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimNot));
}
void IntrinsicCodeGeneratorARM64::VisitStringNewStringFromBytes(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
Register byte_array = WRegisterFrom(locations->InAt(0));
__ Cmp(byte_array, 0);
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
__ B(eq, slow_path->GetEntryLabel());
__ Ldr(lr,
MemOperand(tr, QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, pAllocStringFromBytes).Int32Value()));
CheckEntrypointTypes<kQuickAllocStringFromBytes, void*, void*, int32_t, int32_t, int32_t>();
__ Blr(lr);
codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
__ Bind(slow_path->GetExitLabel());
}
void IntrinsicLocationsBuilderARM64::VisitStringNewStringFromChars(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetRegisterAt(1)));
locations->SetInAt(2, LocationFrom(calling_convention.GetRegisterAt(2)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimNot));
}
void IntrinsicCodeGeneratorARM64::VisitStringNewStringFromChars(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
// No need to emit code checking whether `locations->InAt(2)` is a null
// pointer, as callers of the native method
//
// java.lang.StringFactory.newStringFromChars(int offset, int charCount, char[] data)
//
// all include a null check on `data` before calling that method.
__ Ldr(lr,
MemOperand(tr, QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, pAllocStringFromChars).Int32Value()));
CheckEntrypointTypes<kQuickAllocStringFromChars, void*, int32_t, int32_t, void*>();
__ Blr(lr);
codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
}
void IntrinsicLocationsBuilderARM64::VisitStringNewStringFromString(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetRegisterAt(0)));
locations->SetOut(calling_convention.GetReturnLocation(Primitive::kPrimNot));
}
void IntrinsicCodeGeneratorARM64::VisitStringNewStringFromString(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
Register string_to_copy = WRegisterFrom(locations->InAt(0));
__ Cmp(string_to_copy, 0);
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
__ B(eq, slow_path->GetEntryLabel());
__ Ldr(lr,
MemOperand(tr, QUICK_ENTRYPOINT_OFFSET(kArm64WordSize, pAllocStringFromString).Int32Value()));
CheckEntrypointTypes<kQuickAllocStringFromString, void*, void*>();
__ Blr(lr);
codegen_->RecordPcInfo(invoke, invoke->GetDexPc());
__ Bind(slow_path->GetExitLabel());
}
static void CreateFPToFPCallLocations(ArenaAllocator* arena, HInvoke* invoke) {
DCHECK_EQ(invoke->GetNumberOfArguments(), 1U);
DCHECK(Primitive::IsFloatingPointType(invoke->InputAt(0)->GetType()));
DCHECK(Primitive::IsFloatingPointType(invoke->GetType()));
LocationSummary* const locations = new (arena) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetFpuRegisterAt(0)));
locations->SetOut(calling_convention.GetReturnLocation(invoke->GetType()));
}
static void CreateFPFPToFPCallLocations(ArenaAllocator* arena, HInvoke* invoke) {
DCHECK_EQ(invoke->GetNumberOfArguments(), 2U);
DCHECK(Primitive::IsFloatingPointType(invoke->InputAt(0)->GetType()));
DCHECK(Primitive::IsFloatingPointType(invoke->InputAt(1)->GetType()));
DCHECK(Primitive::IsFloatingPointType(invoke->GetType()));
LocationSummary* const locations = new (arena) LocationSummary(invoke,
LocationSummary::kCall,
kIntrinsified);
InvokeRuntimeCallingConvention calling_convention;
locations->SetInAt(0, LocationFrom(calling_convention.GetFpuRegisterAt(0)));
locations->SetInAt(1, LocationFrom(calling_convention.GetFpuRegisterAt(1)));
locations->SetOut(calling_convention.GetReturnLocation(invoke->GetType()));
}
static void GenFPToFPCall(HInvoke* invoke,
vixl::MacroAssembler* masm,
CodeGeneratorARM64* codegen,
QuickEntrypointEnum entry) {
__ Ldr(lr, MemOperand(tr, GetThreadOffset<kArm64WordSize>(entry).Int32Value()));
__ Blr(lr);
codegen->RecordPcInfo(invoke, invoke->GetDexPc());
}
void IntrinsicLocationsBuilderARM64::VisitMathCos(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathCos(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickCos);
}
void IntrinsicLocationsBuilderARM64::VisitMathSin(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathSin(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickSin);
}
void IntrinsicLocationsBuilderARM64::VisitMathAcos(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAcos(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickAcos);
}
void IntrinsicLocationsBuilderARM64::VisitMathAsin(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAsin(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickAsin);
}
void IntrinsicLocationsBuilderARM64::VisitMathAtan(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAtan(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickAtan);
}
void IntrinsicLocationsBuilderARM64::VisitMathCbrt(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathCbrt(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickCbrt);
}
void IntrinsicLocationsBuilderARM64::VisitMathCosh(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathCosh(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickCosh);
}
void IntrinsicLocationsBuilderARM64::VisitMathExp(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathExp(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickExp);
}
void IntrinsicLocationsBuilderARM64::VisitMathExpm1(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathExpm1(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickExpm1);
}
void IntrinsicLocationsBuilderARM64::VisitMathLog(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathLog(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickLog);
}
void IntrinsicLocationsBuilderARM64::VisitMathLog10(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathLog10(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickLog10);
}
void IntrinsicLocationsBuilderARM64::VisitMathSinh(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathSinh(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickSinh);
}
void IntrinsicLocationsBuilderARM64::VisitMathTan(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathTan(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickTan);
}
void IntrinsicLocationsBuilderARM64::VisitMathTanh(HInvoke* invoke) {
CreateFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathTanh(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickTanh);
}
void IntrinsicLocationsBuilderARM64::VisitMathAtan2(HInvoke* invoke) {
CreateFPFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathAtan2(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickAtan2);
}
void IntrinsicLocationsBuilderARM64::VisitMathHypot(HInvoke* invoke) {
CreateFPFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathHypot(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickHypot);
}
void IntrinsicLocationsBuilderARM64::VisitMathNextAfter(HInvoke* invoke) {
CreateFPFPToFPCallLocations(arena_, invoke);
}
void IntrinsicCodeGeneratorARM64::VisitMathNextAfter(HInvoke* invoke) {
GenFPToFPCall(invoke, GetVIXLAssembler(), codegen_, kQuickNextAfter);
}
void IntrinsicLocationsBuilderARM64::VisitStringGetCharsNoCheck(HInvoke* invoke) {
LocationSummary* locations = new (arena_) LocationSummary(invoke,
LocationSummary::kNoCall,
kIntrinsified);
locations->SetInAt(0, Location::RequiresRegister());
locations->SetInAt(1, Location::RequiresRegister());
locations->SetInAt(2, Location::RequiresRegister());
locations->SetInAt(3, Location::RequiresRegister());
locations->SetInAt(4, Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
}
void IntrinsicCodeGeneratorARM64::VisitStringGetCharsNoCheck(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
// Check assumption that sizeof(Char) is 2 (used in scaling below).
const size_t char_size = Primitive::ComponentSize(Primitive::kPrimChar);
DCHECK_EQ(char_size, 2u);
// Location of data in char array buffer.
const uint32_t data_offset = mirror::Array::DataOffset(char_size).Uint32Value();
// Location of char array data in string.
const uint32_t value_offset = mirror::String::ValueOffset().Uint32Value();
// void getCharsNoCheck(int srcBegin, int srcEnd, char[] dst, int dstBegin);
// Since getChars() calls getCharsNoCheck() - we use registers rather than constants.
Register srcObj = XRegisterFrom(locations->InAt(0));
Register srcBegin = XRegisterFrom(locations->InAt(1));
Register srcEnd = XRegisterFrom(locations->InAt(2));
Register dstObj = XRegisterFrom(locations->InAt(3));
Register dstBegin = XRegisterFrom(locations->InAt(4));
Register src_ptr = XRegisterFrom(locations->GetTemp(0));
Register src_ptr_end = XRegisterFrom(locations->GetTemp(1));
UseScratchRegisterScope temps(masm);
Register dst_ptr = temps.AcquireX();
Register tmp = temps.AcquireW();
// src range to copy.
__ Add(src_ptr, srcObj, Operand(value_offset));
__ Add(src_ptr_end, src_ptr, Operand(srcEnd, LSL, 1));
__ Add(src_ptr, src_ptr, Operand(srcBegin, LSL, 1));
// dst to be copied.
__ Add(dst_ptr, dstObj, Operand(data_offset));
__ Add(dst_ptr, dst_ptr, Operand(dstBegin, LSL, 1));
// Do the copy.
vixl::Label loop, done;
__ Bind(&loop);
__ Cmp(src_ptr, src_ptr_end);
__ B(&done, eq);
__ Ldrh(tmp, MemOperand(src_ptr, char_size, vixl::PostIndex));
__ Strh(tmp, MemOperand(dst_ptr, char_size, vixl::PostIndex));
__ B(&loop);
__ Bind(&done);
}
// Mirrors ARRAYCOPY_SHORT_CHAR_ARRAY_THRESHOLD in libcore, so we can choose to use the native
// implementation there for longer copy lengths.
static constexpr int32_t kSystemArrayCopyCharThreshold = 32;
static void SetSystemArrayCopyLocationRequires(LocationSummary* locations,
uint32_t at,
HInstruction* input) {
HIntConstant* const_input = input->AsIntConstant();
if (const_input != nullptr && !vixl::Assembler::IsImmAddSub(const_input->GetValue())) {
locations->SetInAt(at, Location::RequiresRegister());
} else {
locations->SetInAt(at, Location::RegisterOrConstant(input));
}
}
void IntrinsicLocationsBuilderARM64::VisitSystemArrayCopyChar(HInvoke* invoke) {
// Check to see if we have known failures that will cause us to have to bail out
// to the runtime, and just generate the runtime call directly.
HIntConstant* src_pos = invoke->InputAt(1)->AsIntConstant();
HIntConstant* dst_pos = invoke->InputAt(3)->AsIntConstant();
// The positions must be non-negative.
if ((src_pos != nullptr && src_pos->GetValue() < 0) ||
(dst_pos != nullptr && dst_pos->GetValue() < 0)) {
// We will have to fail anyways.
return;
}
// The length must be >= 0 and not so long that we would (currently) prefer libcore's
// native implementation.
HIntConstant* length = invoke->InputAt(4)->AsIntConstant();
if (length != nullptr) {
int32_t len = length->GetValue();
if (len < 0 || len > kSystemArrayCopyCharThreshold) {
// Just call as normal.
return;
}
}
ArenaAllocator* allocator = invoke->GetBlock()->GetGraph()->GetArena();
LocationSummary* locations = new (allocator) LocationSummary(invoke,
LocationSummary::kCallOnSlowPath,
kIntrinsified);
// arraycopy(char[] src, int src_pos, char[] dst, int dst_pos, int length).
locations->SetInAt(0, Location::RequiresRegister());
SetSystemArrayCopyLocationRequires(locations, 1, invoke->InputAt(1));
locations->SetInAt(2, Location::RequiresRegister());
SetSystemArrayCopyLocationRequires(locations, 3, invoke->InputAt(3));
SetSystemArrayCopyLocationRequires(locations, 4, invoke->InputAt(4));
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
}
static void CheckSystemArrayCopyPosition(vixl::MacroAssembler* masm,
const Location& pos,
const Register& input,
const Location& length,
SlowPathCodeARM64* slow_path,
const Register& input_len,
const Register& temp,
bool length_is_input_length = false) {
const int32_t length_offset = mirror::Array::LengthOffset().Int32Value();
if (pos.IsConstant()) {
int32_t pos_const = pos.GetConstant()->AsIntConstant()->GetValue();
if (pos_const == 0) {
if (!length_is_input_length) {
// Check that length(input) >= length.
__ Ldr(temp, MemOperand(input, length_offset));
__ Cmp(temp, OperandFrom(length, Primitive::kPrimInt));
__ B(slow_path->GetEntryLabel(), lt);
}
} else {
// Check that length(input) >= pos.
__ Ldr(input_len, MemOperand(input, length_offset));
__ Subs(temp, input_len, pos_const);
__ B(slow_path->GetEntryLabel(), lt);
// Check that (length(input) - pos) >= length.
__ Cmp(temp, OperandFrom(length, Primitive::kPrimInt));
__ B(slow_path->GetEntryLabel(), lt);
}
} else if (length_is_input_length) {
// The only way the copy can succeed is if pos is zero.
__ Cbnz(WRegisterFrom(pos), slow_path->GetEntryLabel());
} else {
// Check that pos >= 0.
Register pos_reg = WRegisterFrom(pos);
__ Tbnz(pos_reg, pos_reg.size() - 1, slow_path->GetEntryLabel());
// Check that pos <= length(input) && (length(input) - pos) >= length.
__ Ldr(temp, MemOperand(input, length_offset));
__ Subs(temp, temp, pos_reg);
// Ccmp if length(input) >= pos, else definitely bail to slow path (N!=V == lt).
__ Ccmp(temp, OperandFrom(length, Primitive::kPrimInt), NFlag, ge);
__ B(slow_path->GetEntryLabel(), lt);
}
}
// Compute base source address, base destination address, and end source address
// for System.arraycopy* intrinsics.
static void GenSystemArrayCopyAddresses(vixl::MacroAssembler* masm,
Primitive::Type type,
const Register& src,
const Location& src_pos,
const Register& dst,
const Location& dst_pos,
const Location& copy_length,
const Register& src_base,
const Register& dst_base,
const Register& src_end) {
DCHECK(type == Primitive::kPrimNot || type == Primitive::kPrimChar)
<< "Unexpected element type: " << type;
const int32_t element_size = Primitive::ComponentSize(type);
const int32_t element_size_shift = Primitive::ComponentSizeShift(type);
uint32_t data_offset = mirror::Array::DataOffset(element_size).Uint32Value();
if (src_pos.IsConstant()) {
int32_t constant = src_pos.GetConstant()->AsIntConstant()->GetValue();
__ Add(src_base, src, element_size * constant + data_offset);
} else {
__ Add(src_base, src, data_offset);
__ Add(src_base, src_base, Operand(XRegisterFrom(src_pos), LSL, element_size_shift));
}
if (dst_pos.IsConstant()) {
int32_t constant = dst_pos.GetConstant()->AsIntConstant()->GetValue();
__ Add(dst_base, dst, element_size * constant + data_offset);
} else {
__ Add(dst_base, dst, data_offset);
__ Add(dst_base, dst_base, Operand(XRegisterFrom(dst_pos), LSL, element_size_shift));
}
if (copy_length.IsConstant()) {
int32_t constant = copy_length.GetConstant()->AsIntConstant()->GetValue();
__ Add(src_end, src_base, element_size * constant);
} else {
__ Add(src_end, src_base, Operand(XRegisterFrom(copy_length), LSL, element_size_shift));
}
}
void IntrinsicCodeGeneratorARM64::VisitSystemArrayCopyChar(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
Register src = XRegisterFrom(locations->InAt(0));
Location src_pos = locations->InAt(1);
Register dst = XRegisterFrom(locations->InAt(2));
Location dst_pos = locations->InAt(3);
Location length = locations->InAt(4);
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
// If source and destination are the same, take the slow path. Overlapping copy regions must be
// copied in reverse and we can't know in all cases if it's needed.
__ Cmp(src, dst);
__ B(slow_path->GetEntryLabel(), eq);
// Bail out if the source is null.
__ Cbz(src, slow_path->GetEntryLabel());
// Bail out if the destination is null.
__ Cbz(dst, slow_path->GetEntryLabel());
if (!length.IsConstant()) {
// If the length is negative, bail out.
__ Tbnz(WRegisterFrom(length), kWRegSize - 1, slow_path->GetEntryLabel());
// If the length > 32 then (currently) prefer libcore's native implementation.
__ Cmp(WRegisterFrom(length), kSystemArrayCopyCharThreshold);
__ B(slow_path->GetEntryLabel(), gt);
} else {
// We have already checked in the LocationsBuilder for the constant case.
DCHECK_GE(length.GetConstant()->AsIntConstant()->GetValue(), 0);
DCHECK_LE(length.GetConstant()->AsIntConstant()->GetValue(), 32);
}
Register src_curr_addr = WRegisterFrom(locations->GetTemp(0));
Register dst_curr_addr = WRegisterFrom(locations->GetTemp(1));
Register src_stop_addr = WRegisterFrom(locations->GetTemp(2));
CheckSystemArrayCopyPosition(masm,
src_pos,
src,
length,
slow_path,
src_curr_addr,
dst_curr_addr,
false);
CheckSystemArrayCopyPosition(masm,
dst_pos,
dst,
length,
slow_path,
src_curr_addr,
dst_curr_addr,
false);
src_curr_addr = src_curr_addr.X();
dst_curr_addr = dst_curr_addr.X();
src_stop_addr = src_stop_addr.X();
GenSystemArrayCopyAddresses(masm,
Primitive::kPrimChar,
src,
src_pos,
dst,
dst_pos,
length,
src_curr_addr,
dst_curr_addr,
src_stop_addr);
// Iterate over the arrays and do a raw copy of the chars.
const int32_t char_size = Primitive::ComponentSize(Primitive::kPrimChar);
UseScratchRegisterScope temps(masm);
Register tmp = temps.AcquireW();
vixl::Label loop, done;
__ Bind(&loop);
__ Cmp(src_curr_addr, src_stop_addr);
__ B(&done, eq);
__ Ldrh(tmp, MemOperand(src_curr_addr, char_size, vixl::PostIndex));
__ Strh(tmp, MemOperand(dst_curr_addr, char_size, vixl::PostIndex));
__ B(&loop);
__ Bind(&done);
__ Bind(slow_path->GetExitLabel());
}
// We can choose to use the native implementation there for longer copy lengths.
static constexpr int32_t kSystemArrayCopyThreshold = 128;
// CodeGenerator::CreateSystemArrayCopyLocationSummary use three temporary registers.
// We want to use two temporary registers in order to reduce the register pressure in arm64.
// So we don't use the CodeGenerator::CreateSystemArrayCopyLocationSummary.
void IntrinsicLocationsBuilderARM64::VisitSystemArrayCopy(HInvoke* invoke) {
// Check to see if we have known failures that will cause us to have to bail out
// to the runtime, and just generate the runtime call directly.
HIntConstant* src_pos = invoke->InputAt(1)->AsIntConstant();
HIntConstant* dest_pos = invoke->InputAt(3)->AsIntConstant();
// The positions must be non-negative.
if ((src_pos != nullptr && src_pos->GetValue() < 0) ||
(dest_pos != nullptr && dest_pos->GetValue() < 0)) {
// We will have to fail anyways.
return;
}
// The length must be >= 0.
HIntConstant* length = invoke->InputAt(4)->AsIntConstant();
if (length != nullptr) {
int32_t len = length->GetValue();
if (len < 0 || len >= kSystemArrayCopyThreshold) {
// Just call as normal.
return;
}
}
SystemArrayCopyOptimizations optimizations(invoke);
if (optimizations.GetDestinationIsSource()) {
if (src_pos != nullptr && dest_pos != nullptr && src_pos->GetValue() < dest_pos->GetValue()) {
// We only support backward copying if source and destination are the same.
return;
}
}
if (optimizations.GetDestinationIsPrimitiveArray() || optimizations.GetSourceIsPrimitiveArray()) {
// We currently don't intrinsify primitive copying.
return;
}
ArenaAllocator* allocator = invoke->GetBlock()->GetGraph()->GetArena();
LocationSummary* locations = new (allocator) LocationSummary(invoke,
LocationSummary::kCallOnSlowPath,
kIntrinsified);
// arraycopy(Object src, int src_pos, Object dest, int dest_pos, int length).
locations->SetInAt(0, Location::RequiresRegister());
SetSystemArrayCopyLocationRequires(locations, 1, invoke->InputAt(1));
locations->SetInAt(2, Location::RequiresRegister());
SetSystemArrayCopyLocationRequires(locations, 3, invoke->InputAt(3));
SetSystemArrayCopyLocationRequires(locations, 4, invoke->InputAt(4));
locations->AddTemp(Location::RequiresRegister());
locations->AddTemp(Location::RequiresRegister());
}
void IntrinsicCodeGeneratorARM64::VisitSystemArrayCopy(HInvoke* invoke) {
vixl::MacroAssembler* masm = GetVIXLAssembler();
LocationSummary* locations = invoke->GetLocations();
uint32_t class_offset = mirror::Object::ClassOffset().Int32Value();
uint32_t super_offset = mirror::Class::SuperClassOffset().Int32Value();
uint32_t component_offset = mirror::Class::ComponentTypeOffset().Int32Value();
uint32_t primitive_offset = mirror::Class::PrimitiveTypeOffset().Int32Value();
Register src = XRegisterFrom(locations->InAt(0));
Location src_pos = locations->InAt(1);
Register dest = XRegisterFrom(locations->InAt(2));
Location dest_pos = locations->InAt(3);
Location length = locations->InAt(4);
Register temp1 = WRegisterFrom(locations->GetTemp(0));
Register temp2 = WRegisterFrom(locations->GetTemp(1));
SlowPathCodeARM64* slow_path = new (GetAllocator()) IntrinsicSlowPathARM64(invoke);
codegen_->AddSlowPath(slow_path);
vixl::Label conditions_on_positions_validated;
SystemArrayCopyOptimizations optimizations(invoke);
// If source and destination are the same, we go to slow path if we need to do
// forward copying.
if (src_pos.IsConstant()) {
int32_t src_pos_constant = src_pos.GetConstant()->AsIntConstant()->GetValue();
if (dest_pos.IsConstant()) {
int32_t dest_pos_constant = dest_pos.GetConstant()->AsIntConstant()->GetValue();
if (optimizations.GetDestinationIsSource()) {
// Checked when building locations.
DCHECK_GE(src_pos_constant, dest_pos_constant);
} else if (src_pos_constant < dest_pos_constant) {
__ Cmp(src, dest);
__ B(slow_path->GetEntryLabel(), eq);
}
// Checked when building locations.
DCHECK(!optimizations.GetDestinationIsSource()
|| (src_pos_constant >= dest_pos.GetConstant()->AsIntConstant()->GetValue()));
} else {
if (!optimizations.GetDestinationIsSource()) {
__ Cmp(src, dest);
__ B(&conditions_on_positions_validated, ne);
}
__ Cmp(WRegisterFrom(dest_pos), src_pos_constant);
__ B(slow_path->GetEntryLabel(), gt);
}
} else {
if (!optimizations.GetDestinationIsSource()) {
__ Cmp(src, dest);
__ B(&conditions_on_positions_validated, ne);
}
__ Cmp(RegisterFrom(src_pos, invoke->InputAt(1)->GetType()),
OperandFrom(dest_pos, invoke->InputAt(3)->GetType()));
__ B(slow_path->GetEntryLabel(), lt);
}
__ Bind(&conditions_on_positions_validated);
if (!optimizations.GetSourceIsNotNull()) {
// Bail out if the source is null.
__ Cbz(src, slow_path->GetEntryLabel());
}
if (!optimizations.GetDestinationIsNotNull() && !optimizations.GetDestinationIsSource()) {
// Bail out if the destination is null.
__ Cbz(dest, slow_path->GetEntryLabel());
}
// We have already checked in the LocationsBuilder for the constant case.
if (!length.IsConstant() &&
!optimizations.GetCountIsSourceLength() &&
!optimizations.GetCountIsDestinationLength()) {
// If the length is negative, bail out.
__ Tbnz(WRegisterFrom(length), kWRegSize - 1, slow_path->GetEntryLabel());
// If the length >= 128 then (currently) prefer native implementation.
__ Cmp(WRegisterFrom(length), kSystemArrayCopyThreshold);
__ B(slow_path->GetEntryLabel(), ge);
}
// Validity checks: source.
CheckSystemArrayCopyPosition(masm,
src_pos,
src,
length,
slow_path,
temp1,
temp2,
optimizations.GetCountIsSourceLength());
// Validity checks: dest.
CheckSystemArrayCopyPosition(masm,
dest_pos,
dest,
length,
slow_path,
temp1,
temp2,
optimizations.GetCountIsDestinationLength());
{
// We use a block to end the scratch scope before the write barrier, thus
// freeing the temporary registers so they can be used in `MarkGCCard`.
UseScratchRegisterScope temps(masm);
Register temp3 = temps.AcquireW();
if (!optimizations.GetDoesNotNeedTypeCheck()) {
// Check whether all elements of the source array are assignable to the component
// type of the destination array. We do two checks: the classes are the same,
// or the destination is Object[]. If none of these checks succeed, we go to the
// slow path.
__ Ldr(temp1, MemOperand(dest, class_offset));
__ Ldr(temp2, MemOperand(src, class_offset));
bool did_unpoison = false;
if (!optimizations.GetDestinationIsNonPrimitiveArray() ||
!optimizations.GetSourceIsNonPrimitiveArray()) {
// One or two of the references need to be unpoisoned. Unpoison them
// both to make the identity check valid.
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp1);
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp2);
did_unpoison = true;
}
if (!optimizations.GetDestinationIsNonPrimitiveArray()) {
// Bail out if the destination is not a non primitive array.
// /* HeapReference<Class> */ temp3 = temp1->component_type_
__ Ldr(temp3, HeapOperand(temp1, component_offset));
__ Cbz(temp3, slow_path->GetEntryLabel());
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp3);
__ Ldrh(temp3, HeapOperand(temp3, primitive_offset));
static_assert(Primitive::kPrimNot == 0, "Expected 0 for kPrimNot");
__ Cbnz(temp3, slow_path->GetEntryLabel());
}
if (!optimizations.GetSourceIsNonPrimitiveArray()) {
// Bail out if the source is not a non primitive array.
// /* HeapReference<Class> */ temp3 = temp2->component_type_
__ Ldr(temp3, HeapOperand(temp2, component_offset));
__ Cbz(temp3, slow_path->GetEntryLabel());
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp3);
__ Ldrh(temp3, HeapOperand(temp3, primitive_offset));
static_assert(Primitive::kPrimNot == 0, "Expected 0 for kPrimNot");
__ Cbnz(temp3, slow_path->GetEntryLabel());
}
__ Cmp(temp1, temp2);
if (optimizations.GetDestinationIsTypedObjectArray()) {
vixl::Label do_copy;
__ B(&do_copy, eq);
if (!did_unpoison) {
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp1);
}
// /* HeapReference<Class> */ temp1 = temp1->component_type_
__ Ldr(temp1, HeapOperand(temp1, component_offset));
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp1);
// /* HeapReference<Class> */ temp1 = temp1->super_class_
__ Ldr(temp1, HeapOperand(temp1, super_offset));
// No need to unpoison the result, we're comparing against null.
__ Cbnz(temp1, slow_path->GetEntryLabel());
__ Bind(&do_copy);
} else {
__ B(slow_path->GetEntryLabel(), ne);
}
} else if (!optimizations.GetSourceIsNonPrimitiveArray()) {
DCHECK(optimizations.GetDestinationIsNonPrimitiveArray());
// Bail out if the source is not a non primitive array.
// /* HeapReference<Class> */ temp1 = src->klass_
__ Ldr(temp1, HeapOperand(src.W(), class_offset));
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp1);
// /* HeapReference<Class> */ temp3 = temp1->component_type_
__ Ldr(temp3, HeapOperand(temp1, component_offset));
__ Cbz(temp3, slow_path->GetEntryLabel());
codegen_->GetAssembler()->MaybeUnpoisonHeapReference(temp3);
__ Ldrh(temp3, HeapOperand(temp3, primitive_offset));
static_assert(Primitive::kPrimNot == 0, "Expected 0 for kPrimNot");
__ Cbnz(temp3, slow_path->GetEntryLabel());
}
Register src_curr_addr = temp1.X();
Register dst_curr_addr = temp2.X();
Register src_stop_addr = temp3.X();
GenSystemArrayCopyAddresses(masm,
Primitive::kPrimNot,
src,
src_pos,
dest,
dest_pos,
length,
src_curr_addr,
dst_curr_addr,
src_stop_addr);
// Iterate over the arrays and do a raw copy of the objects. We don't need to
// poison/unpoison, nor do any read barrier as the next uses of the destination
// array will do it.
vixl::Label loop, done;
const int32_t element_size = Primitive::ComponentSize(Primitive::kPrimNot);
__ Bind(&loop);
__ Cmp(src_curr_addr, src_stop_addr);
__ B(&done, eq);
{
Register tmp = temps.AcquireW();
__ Ldr(tmp, MemOperand(src_curr_addr, element_size, vixl::PostIndex));
__ Str(tmp, MemOperand(dst_curr_addr, element_size, vixl::PostIndex));
}
__ B(&loop);
__ Bind(&done);
}
// We only need one card marking on the destination array.
codegen_->MarkGCCard(dest.W(), Register(), /* value_can_be_null */ false);
__ Bind(slow_path->GetExitLabel());
}
UNIMPLEMENTED_INTRINSIC(ARM64, ReferenceGetReferent)
UNIMPLEMENTED_INTRINSIC(ARM64, FloatIsInfinite)
UNIMPLEMENTED_INTRINSIC(ARM64, DoubleIsInfinite)
UNIMPLEMENTED_INTRINSIC(ARM64, IntegerHighestOneBit)
UNIMPLEMENTED_INTRINSIC(ARM64, LongHighestOneBit)
UNIMPLEMENTED_INTRINSIC(ARM64, IntegerLowestOneBit)
UNIMPLEMENTED_INTRINSIC(ARM64, LongLowestOneBit)
// 1.8.
UNIMPLEMENTED_INTRINSIC(ARM64, UnsafeGetAndAddInt)
UNIMPLEMENTED_INTRINSIC(ARM64, UnsafeGetAndAddLong)
UNIMPLEMENTED_INTRINSIC(ARM64, UnsafeGetAndSetInt)
UNIMPLEMENTED_INTRINSIC(ARM64, UnsafeGetAndSetLong)
UNIMPLEMENTED_INTRINSIC(ARM64, UnsafeGetAndSetObject)
UNREACHABLE_INTRINSICS(ARM64)
#undef __
} // namespace arm64
} // namespace art
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