| /* |
| * 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_arm.h" |
| |
| #include "arch/arm/instruction_set_features_arm.h" |
| #include "art_method.h" |
| #include "code_generator_arm.h" |
| #include "entrypoints/quick/quick_entrypoints.h" |
| #include "intrinsics.h" |
| #include "intrinsics_utils.h" |
| #include "mirror/array-inl.h" |
| #include "mirror/string.h" |
| #include "thread.h" |
| #include "utils/arm/assembler_arm.h" |
| |
| namespace art { |
| |
| namespace arm { |
| |
| ArmAssembler* IntrinsicCodeGeneratorARM::GetAssembler() { |
| return codegen_->GetAssembler(); |
| } |
| |
| ArenaAllocator* IntrinsicCodeGeneratorARM::GetAllocator() { |
| return codegen_->GetGraph()->GetArena(); |
| } |
| |
| using IntrinsicSlowPathARM = IntrinsicSlowPath<InvokeDexCallingConventionVisitorARM>; |
| |
| bool IntrinsicLocationsBuilderARM::TryDispatch(HInvoke* invoke) { |
| Dispatch(invoke); |
| LocationSummary* res = invoke->GetLocations(); |
| return res != nullptr && res->Intrinsified(); |
| } |
| |
| #define __ assembler-> |
| |
| 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, ArmAssembler* assembler) { |
| Location input = locations->InAt(0); |
| Location output = locations->Out(); |
| if (is64bit) { |
| __ vmovrrd(output.AsRegisterPairLow<Register>(), |
| output.AsRegisterPairHigh<Register>(), |
| FromLowSToD(input.AsFpuRegisterPairLow<SRegister>())); |
| } else { |
| __ vmovrs(output.AsRegister<Register>(), input.AsFpuRegister<SRegister>()); |
| } |
| } |
| |
| static void MoveIntToFP(LocationSummary* locations, bool is64bit, ArmAssembler* assembler) { |
| Location input = locations->InAt(0); |
| Location output = locations->Out(); |
| if (is64bit) { |
| __ vmovdrr(FromLowSToD(output.AsFpuRegisterPairLow<SRegister>()), |
| input.AsRegisterPairLow<Register>(), |
| input.AsRegisterPairHigh<Register>()); |
| } else { |
| __ vmovsr(output.AsFpuRegister<SRegister>(), input.AsRegister<Register>()); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitDoubleDoubleToRawLongBits(HInvoke* invoke) { |
| CreateFPToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitDoubleLongBitsToDouble(HInvoke* invoke) { |
| CreateIntToFPLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitDoubleDoubleToRawLongBits(HInvoke* invoke) { |
| MoveFPToInt(invoke->GetLocations(), true, GetAssembler()); |
| } |
| void IntrinsicCodeGeneratorARM::VisitDoubleLongBitsToDouble(HInvoke* invoke) { |
| MoveIntToFP(invoke->GetLocations(), true, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitFloatFloatToRawIntBits(HInvoke* invoke) { |
| CreateFPToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitFloatIntBitsToFloat(HInvoke* invoke) { |
| CreateIntToFPLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitFloatFloatToRawIntBits(HInvoke* invoke) { |
| MoveFPToInt(invoke->GetLocations(), false, GetAssembler()); |
| } |
| void IntrinsicCodeGeneratorARM::VisitFloatIntBitsToFloat(HInvoke* invoke) { |
| MoveIntToFP(invoke->GetLocations(), false, GetAssembler()); |
| } |
| |
| 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 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 GenNumberOfLeadingZeros(LocationSummary* locations, |
| Primitive::Type type, |
| ArmAssembler* assembler) { |
| Location in = locations->InAt(0); |
| Register out = locations->Out().AsRegister<Register>(); |
| |
| DCHECK((type == Primitive::kPrimInt) || (type == Primitive::kPrimLong)); |
| |
| if (type == Primitive::kPrimLong) { |
| Register in_reg_lo = in.AsRegisterPairLow<Register>(); |
| Register in_reg_hi = in.AsRegisterPairHigh<Register>(); |
| Label end; |
| __ clz(out, in_reg_hi); |
| __ CompareAndBranchIfNonZero(in_reg_hi, &end); |
| __ clz(out, in_reg_lo); |
| __ AddConstant(out, 32); |
| __ Bind(&end); |
| } else { |
| __ clz(out, in.AsRegister<Register>()); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitIntegerNumberOfLeadingZeros(HInvoke* invoke) { |
| CreateIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitIntegerNumberOfLeadingZeros(HInvoke* invoke) { |
| GenNumberOfLeadingZeros(invoke->GetLocations(), Primitive::kPrimInt, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitLongNumberOfLeadingZeros(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitLongNumberOfLeadingZeros(HInvoke* invoke) { |
| GenNumberOfLeadingZeros(invoke->GetLocations(), Primitive::kPrimLong, GetAssembler()); |
| } |
| |
| static void GenNumberOfTrailingZeros(LocationSummary* locations, |
| Primitive::Type type, |
| ArmAssembler* assembler) { |
| DCHECK((type == Primitive::kPrimInt) || (type == Primitive::kPrimLong)); |
| |
| Register out = locations->Out().AsRegister<Register>(); |
| |
| if (type == Primitive::kPrimLong) { |
| Register in_reg_lo = locations->InAt(0).AsRegisterPairLow<Register>(); |
| Register in_reg_hi = locations->InAt(0).AsRegisterPairHigh<Register>(); |
| Label end; |
| __ rbit(out, in_reg_lo); |
| __ clz(out, out); |
| __ CompareAndBranchIfNonZero(in_reg_lo, &end); |
| __ rbit(out, in_reg_hi); |
| __ clz(out, out); |
| __ AddConstant(out, 32); |
| __ Bind(&end); |
| } else { |
| Register in = locations->InAt(0).AsRegister<Register>(); |
| __ rbit(out, in); |
| __ clz(out, out); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitIntegerNumberOfTrailingZeros(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitIntegerNumberOfTrailingZeros(HInvoke* invoke) { |
| GenNumberOfTrailingZeros(invoke->GetLocations(), Primitive::kPrimInt, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitLongNumberOfTrailingZeros(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitLongNumberOfTrailingZeros(HInvoke* invoke) { |
| GenNumberOfTrailingZeros(invoke->GetLocations(), Primitive::kPrimLong, GetAssembler()); |
| } |
| |
| static void GenIntegerRotate(LocationSummary* locations, |
| ArmAssembler* assembler, |
| bool is_left) { |
| Register in = locations->InAt(0).AsRegister<Register>(); |
| Location rhs = locations->InAt(1); |
| Register out = locations->Out().AsRegister<Register>(); |
| |
| if (rhs.IsConstant()) { |
| // Arm32 and Thumb2 assemblers require a rotation on the interval [1,31], |
| // so map all rotations to a +ve. equivalent in that range. |
| // (e.g. left *or* right by -2 bits == 30 bits in the same direction.) |
| uint32_t rot = rhs.GetConstant()->AsIntConstant()->GetValue() & 0x1F; |
| if (rot) { |
| // Rotate, mapping left rotations to right equivalents if necessary. |
| // (e.g. left by 2 bits == right by 30.) |
| __ Ror(out, in, is_left ? (0x20 - rot) : rot); |
| } else if (out != in) { |
| __ Mov(out, in); |
| } |
| } else { |
| if (is_left) { |
| __ rsb(out, rhs.AsRegister<Register>(), ShifterOperand(0)); |
| __ Ror(out, in, out); |
| } else { |
| __ Ror(out, in, rhs.AsRegister<Register>()); |
| } |
| } |
| } |
| |
| // Gain some speed by mapping all Long rotates onto equivalent pairs of Integer |
| // rotates by swapping input regs (effectively rotating by the first 32-bits of |
| // a larger rotation) or flipping direction (thus treating larger right/left |
| // rotations as sub-word sized rotations in the other direction) as appropriate. |
| static void GenLongRotate(LocationSummary* locations, |
| ArmAssembler* assembler, |
| bool is_left) { |
| Register in_reg_lo = locations->InAt(0).AsRegisterPairLow<Register>(); |
| Register in_reg_hi = locations->InAt(0).AsRegisterPairHigh<Register>(); |
| Location rhs = locations->InAt(1); |
| Register out_reg_lo = locations->Out().AsRegisterPairLow<Register>(); |
| Register out_reg_hi = locations->Out().AsRegisterPairHigh<Register>(); |
| |
| if (rhs.IsConstant()) { |
| uint32_t rot = rhs.GetConstant()->AsIntConstant()->GetValue(); |
| // Map all left rotations to right equivalents. |
| if (is_left) { |
| rot = 0x40 - rot; |
| } |
| // Map all rotations to +ve. equivalents on the interval [0,63]. |
| rot &= 0x3F; |
| // For rotates over a word in size, 'pre-rotate' by 32-bits to keep rotate |
| // logic below to a simple pair of binary orr. |
| // (e.g. 34 bits == in_reg swap + 2 bits right.) |
| if (rot >= 0x20) { |
| rot -= 0x20; |
| std::swap(in_reg_hi, in_reg_lo); |
| } |
| // Rotate, or mov to out for zero or word size rotations. |
| if (rot) { |
| __ Lsr(out_reg_hi, in_reg_hi, rot); |
| __ orr(out_reg_hi, out_reg_hi, ShifterOperand(in_reg_lo, arm::LSL, 0x20 - rot)); |
| __ Lsr(out_reg_lo, in_reg_lo, rot); |
| __ orr(out_reg_lo, out_reg_lo, ShifterOperand(in_reg_hi, arm::LSL, 0x20 - rot)); |
| } else { |
| __ Mov(out_reg_lo, in_reg_lo); |
| __ Mov(out_reg_hi, in_reg_hi); |
| } |
| } else { |
| Register shift_left = locations->GetTemp(0).AsRegister<Register>(); |
| Register shift_right = locations->GetTemp(1).AsRegister<Register>(); |
| Label end; |
| Label right; |
| |
| __ and_(shift_left, rhs.AsRegister<Register>(), ShifterOperand(0x1F)); |
| __ Lsrs(shift_right, rhs.AsRegister<Register>(), 6); |
| __ rsb(shift_right, shift_left, ShifterOperand(0x20), AL, kCcKeep); |
| |
| if (is_left) { |
| __ b(&right, CS); |
| } else { |
| __ b(&right, CC); |
| std::swap(shift_left, shift_right); |
| } |
| |
| // out_reg_hi = (reg_hi << shift_left) | (reg_lo >> shift_right). |
| // out_reg_lo = (reg_lo << shift_left) | (reg_hi >> shift_right). |
| __ Lsl(out_reg_hi, in_reg_hi, shift_left); |
| __ Lsr(out_reg_lo, in_reg_lo, shift_right); |
| __ add(out_reg_hi, out_reg_hi, ShifterOperand(out_reg_lo)); |
| __ Lsl(out_reg_lo, in_reg_lo, shift_left); |
| __ Lsr(shift_left, in_reg_hi, shift_right); |
| __ add(out_reg_lo, out_reg_lo, ShifterOperand(shift_left)); |
| __ b(&end); |
| |
| // out_reg_hi = (reg_hi >> shift_right) | (reg_lo << shift_left). |
| // out_reg_lo = (reg_lo >> shift_right) | (reg_hi << shift_left). |
| __ Bind(&right); |
| __ Lsr(out_reg_hi, in_reg_hi, shift_right); |
| __ Lsl(out_reg_lo, in_reg_lo, shift_left); |
| __ add(out_reg_hi, out_reg_hi, ShifterOperand(out_reg_lo)); |
| __ Lsr(out_reg_lo, in_reg_lo, shift_right); |
| __ Lsl(shift_right, in_reg_hi, shift_left); |
| __ add(out_reg_lo, out_reg_lo, ShifterOperand(shift_right)); |
| |
| __ Bind(&end); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitIntegerRotateRight(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetInAt(1, Location::RegisterOrConstant(invoke->InputAt(1))); |
| locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitIntegerRotateRight(HInvoke* invoke) { |
| GenIntegerRotate(invoke->GetLocations(), GetAssembler(), false /* is_left */); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitLongRotateRight(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| if (invoke->InputAt(1)->IsConstant()) { |
| locations->SetInAt(1, Location::ConstantLocation(invoke->InputAt(1)->AsConstant())); |
| } else { |
| locations->SetInAt(1, Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| } |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitLongRotateRight(HInvoke* invoke) { |
| GenLongRotate(invoke->GetLocations(), GetAssembler(), false /* is_left */); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitIntegerRotateLeft(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetInAt(1, Location::RegisterOrConstant(invoke->InputAt(1))); |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitIntegerRotateLeft(HInvoke* invoke) { |
| GenIntegerRotate(invoke->GetLocations(), GetAssembler(), true /* is_left */); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitLongRotateLeft(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| if (invoke->InputAt(1)->IsConstant()) { |
| locations->SetInAt(1, Location::ConstantLocation(invoke->InputAt(1)->AsConstant())); |
| } else { |
| locations->SetInAt(1, Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| } |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitLongRotateLeft(HInvoke* invoke) { |
| GenLongRotate(invoke->GetLocations(), GetAssembler(), true /* is_left */); |
| } |
| |
| static void MathAbsFP(LocationSummary* locations, bool is64bit, ArmAssembler* assembler) { |
| Location in = locations->InAt(0); |
| Location out = locations->Out(); |
| |
| if (is64bit) { |
| __ vabsd(FromLowSToD(out.AsFpuRegisterPairLow<SRegister>()), |
| FromLowSToD(in.AsFpuRegisterPairLow<SRegister>())); |
| } else { |
| __ vabss(out.AsFpuRegister<SRegister>(), in.AsFpuRegister<SRegister>()); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathAbsDouble(HInvoke* invoke) { |
| CreateFPToFPLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathAbsDouble(HInvoke* invoke) { |
| MathAbsFP(invoke->GetLocations(), true, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathAbsFloat(HInvoke* invoke) { |
| CreateFPToFPLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathAbsFloat(HInvoke* invoke) { |
| MathAbsFP(invoke->GetLocations(), false, GetAssembler()); |
| } |
| |
| static void CreateIntToIntPlusTemp(ArenaAllocator* arena, HInvoke* invoke) { |
| LocationSummary* locations = new (arena) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap); |
| |
| locations->AddTemp(Location::RequiresRegister()); |
| } |
| |
| static void GenAbsInteger(LocationSummary* locations, |
| bool is64bit, |
| ArmAssembler* assembler) { |
| Location in = locations->InAt(0); |
| Location output = locations->Out(); |
| |
| Register mask = locations->GetTemp(0).AsRegister<Register>(); |
| |
| if (is64bit) { |
| Register in_reg_lo = in.AsRegisterPairLow<Register>(); |
| Register in_reg_hi = in.AsRegisterPairHigh<Register>(); |
| Register out_reg_lo = output.AsRegisterPairLow<Register>(); |
| Register out_reg_hi = output.AsRegisterPairHigh<Register>(); |
| |
| DCHECK_NE(out_reg_lo, in_reg_hi) << "Diagonal overlap unexpected."; |
| |
| __ Asr(mask, in_reg_hi, 31); |
| __ adds(out_reg_lo, in_reg_lo, ShifterOperand(mask)); |
| __ adc(out_reg_hi, in_reg_hi, ShifterOperand(mask)); |
| __ eor(out_reg_lo, mask, ShifterOperand(out_reg_lo)); |
| __ eor(out_reg_hi, mask, ShifterOperand(out_reg_hi)); |
| } else { |
| Register in_reg = in.AsRegister<Register>(); |
| Register out_reg = output.AsRegister<Register>(); |
| |
| __ Asr(mask, in_reg, 31); |
| __ add(out_reg, in_reg, ShifterOperand(mask)); |
| __ eor(out_reg, mask, ShifterOperand(out_reg)); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathAbsInt(HInvoke* invoke) { |
| CreateIntToIntPlusTemp(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathAbsInt(HInvoke* invoke) { |
| GenAbsInteger(invoke->GetLocations(), false, GetAssembler()); |
| } |
| |
| |
| void IntrinsicLocationsBuilderARM::VisitMathAbsLong(HInvoke* invoke) { |
| CreateIntToIntPlusTemp(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathAbsLong(HInvoke* invoke) { |
| GenAbsInteger(invoke->GetLocations(), true, GetAssembler()); |
| } |
| |
| static void GenMinMax(LocationSummary* locations, |
| bool is_min, |
| ArmAssembler* assembler) { |
| Register op1 = locations->InAt(0).AsRegister<Register>(); |
| Register op2 = locations->InAt(1).AsRegister<Register>(); |
| Register out = locations->Out().AsRegister<Register>(); |
| |
| __ cmp(op1, ShifterOperand(op2)); |
| |
| __ it((is_min) ? Condition::LT : Condition::GT, kItElse); |
| __ mov(out, ShifterOperand(op1), is_min ? Condition::LT : Condition::GT); |
| __ mov(out, ShifterOperand(op2), is_min ? Condition::GE : Condition::LE); |
| } |
| |
| 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); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathMinIntInt(HInvoke* invoke) { |
| CreateIntIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathMinIntInt(HInvoke* invoke) { |
| GenMinMax(invoke->GetLocations(), true, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathMaxIntInt(HInvoke* invoke) { |
| CreateIntIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathMaxIntInt(HInvoke* invoke) { |
| GenMinMax(invoke->GetLocations(), false, GetAssembler()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMathSqrt(HInvoke* invoke) { |
| CreateFPToFPLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMathSqrt(HInvoke* invoke) { |
| LocationSummary* locations = invoke->GetLocations(); |
| ArmAssembler* assembler = GetAssembler(); |
| __ vsqrtd(FromLowSToD(locations->Out().AsFpuRegisterPairLow<SRegister>()), |
| FromLowSToD(locations->InAt(0).AsFpuRegisterPairLow<SRegister>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPeekByte(HInvoke* invoke) { |
| CreateIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPeekByte(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| // Ignore upper 4B of long address. |
| __ ldrsb(invoke->GetLocations()->Out().AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPeekIntNative(HInvoke* invoke) { |
| CreateIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPeekIntNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| // Ignore upper 4B of long address. |
| __ ldr(invoke->GetLocations()->Out().AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPeekLongNative(HInvoke* invoke) { |
| CreateIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPeekLongNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| // Ignore upper 4B of long address. |
| Register addr = invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>(); |
| // Worst case: Control register bit SCTLR.A = 0. Then unaligned accesses throw a processor |
| // exception. So we can't use ldrd as addr may be unaligned. |
| Register lo = invoke->GetLocations()->Out().AsRegisterPairLow<Register>(); |
| Register hi = invoke->GetLocations()->Out().AsRegisterPairHigh<Register>(); |
| if (addr == lo) { |
| __ ldr(hi, Address(addr, 4)); |
| __ ldr(lo, Address(addr, 0)); |
| } else { |
| __ ldr(lo, Address(addr, 0)); |
| __ ldr(hi, Address(addr, 4)); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPeekShortNative(HInvoke* invoke) { |
| CreateIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPeekShortNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| // Ignore upper 4B of long address. |
| __ ldrsh(invoke->GetLocations()->Out().AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| 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 IntrinsicLocationsBuilderARM::VisitMemoryPokeByte(HInvoke* invoke) { |
| CreateIntIntToVoidLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPokeByte(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| __ strb(invoke->GetLocations()->InAt(1).AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPokeIntNative(HInvoke* invoke) { |
| CreateIntIntToVoidLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPokeIntNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| __ str(invoke->GetLocations()->InAt(1).AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPokeLongNative(HInvoke* invoke) { |
| CreateIntIntToVoidLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPokeLongNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| // Ignore upper 4B of long address. |
| Register addr = invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>(); |
| // Worst case: Control register bit SCTLR.A = 0. Then unaligned accesses throw a processor |
| // exception. So we can't use ldrd as addr may be unaligned. |
| __ str(invoke->GetLocations()->InAt(1).AsRegisterPairLow<Register>(), Address(addr, 0)); |
| __ str(invoke->GetLocations()->InAt(1).AsRegisterPairHigh<Register>(), Address(addr, 4)); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitMemoryPokeShortNative(HInvoke* invoke) { |
| CreateIntIntToVoidLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitMemoryPokeShortNative(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| __ strh(invoke->GetLocations()->InAt(1).AsRegister<Register>(), |
| Address(invoke->GetLocations()->InAt(0).AsRegisterPairLow<Register>())); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitThreadCurrentThread(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| locations->SetOut(Location::RequiresRegister()); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitThreadCurrentThread(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| __ LoadFromOffset(kLoadWord, |
| invoke->GetLocations()->Out().AsRegister<Register>(), |
| TR, |
| Thread::PeerOffset<kArmPointerSize>().Int32Value()); |
| } |
| |
| static void GenUnsafeGet(HInvoke* invoke, |
| Primitive::Type type, |
| bool is_volatile, |
| CodeGeneratorARM* codegen) { |
| LocationSummary* locations = invoke->GetLocations(); |
| DCHECK((type == Primitive::kPrimInt) || |
| (type == Primitive::kPrimLong) || |
| (type == Primitive::kPrimNot)); |
| ArmAssembler* assembler = codegen->GetAssembler(); |
| Register base = locations->InAt(1).AsRegister<Register>(); // Object pointer. |
| Register offset = locations->InAt(2).AsRegisterPairLow<Register>(); // Long offset, lo part only. |
| |
| if (type == Primitive::kPrimLong) { |
| Register trg_lo = locations->Out().AsRegisterPairLow<Register>(); |
| __ add(IP, base, ShifterOperand(offset)); |
| if (is_volatile && !codegen->GetInstructionSetFeatures().HasAtomicLdrdAndStrd()) { |
| Register trg_hi = locations->Out().AsRegisterPairHigh<Register>(); |
| __ ldrexd(trg_lo, trg_hi, IP); |
| } else { |
| __ ldrd(trg_lo, Address(IP)); |
| } |
| } else { |
| Register trg = locations->Out().AsRegister<Register>(); |
| __ ldr(trg, Address(base, offset)); |
| } |
| |
| if (is_volatile) { |
| __ dmb(ISH); |
| } |
| |
| if (type == Primitive::kPrimNot) { |
| Register trg = locations->Out().AsRegister<Register>(); |
| __ MaybeUnpoisonHeapReference(trg); |
| } |
| } |
| |
| static void CreateIntIntIntToIntLocations(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->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGet(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGetVolatile(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGetLong(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGetLongVolatile(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGetObject(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeGetObjectVolatile(HInvoke* invoke) { |
| CreateIntIntIntToIntLocations(arena_, invoke); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGet(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimInt, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGetVolatile(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimInt, true, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGetLong(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimLong, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGetLongVolatile(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimLong, true, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGetObject(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimNot, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeGetObjectVolatile(HInvoke* invoke) { |
| GenUnsafeGet(invoke, Primitive::kPrimNot, true, codegen_); |
| } |
| |
| static void CreateIntIntIntIntToVoid(ArenaAllocator* arena, |
| const ArmInstructionSetFeatures& features, |
| Primitive::Type type, |
| bool is_volatile, |
| 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()); |
| |
| if (type == Primitive::kPrimLong) { |
| // Potentially need temps for ldrexd-strexd loop. |
| if (is_volatile && !features.HasAtomicLdrdAndStrd()) { |
| locations->AddTemp(Location::RequiresRegister()); // Temp_lo. |
| locations->AddTemp(Location::RequiresRegister()); // Temp_hi. |
| } |
| } else if (type == Primitive::kPrimNot) { |
| // Temps for card-marking. |
| locations->AddTemp(Location::RequiresRegister()); // Temp. |
| locations->AddTemp(Location::RequiresRegister()); // Card. |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitUnsafePut(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimInt, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutOrdered(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimInt, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutVolatile(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimInt, true, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutObject(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimNot, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutObjectOrdered(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimNot, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutObjectVolatile(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimNot, true, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutLong(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimLong, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutLongOrdered(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimLong, false, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafePutLongVolatile(HInvoke* invoke) { |
| CreateIntIntIntIntToVoid(arena_, features_, Primitive::kPrimLong, true, invoke); |
| } |
| |
| static void GenUnsafePut(LocationSummary* locations, |
| Primitive::Type type, |
| bool is_volatile, |
| bool is_ordered, |
| CodeGeneratorARM* codegen) { |
| ArmAssembler* assembler = codegen->GetAssembler(); |
| |
| Register base = locations->InAt(1).AsRegister<Register>(); // Object pointer. |
| Register offset = locations->InAt(2).AsRegisterPairLow<Register>(); // Long offset, lo part only. |
| Register value; |
| |
| if (is_volatile || is_ordered) { |
| __ dmb(ISH); |
| } |
| |
| if (type == Primitive::kPrimLong) { |
| Register value_lo = locations->InAt(3).AsRegisterPairLow<Register>(); |
| value = value_lo; |
| if (is_volatile && !codegen->GetInstructionSetFeatures().HasAtomicLdrdAndStrd()) { |
| Register temp_lo = locations->GetTemp(0).AsRegister<Register>(); |
| Register temp_hi = locations->GetTemp(1).AsRegister<Register>(); |
| Register value_hi = locations->InAt(3).AsRegisterPairHigh<Register>(); |
| |
| __ add(IP, base, ShifterOperand(offset)); |
| Label loop_head; |
| __ Bind(&loop_head); |
| __ ldrexd(temp_lo, temp_hi, IP); |
| __ strexd(temp_lo, value_lo, value_hi, IP); |
| __ cmp(temp_lo, ShifterOperand(0)); |
| __ b(&loop_head, NE); |
| } else { |
| __ add(IP, base, ShifterOperand(offset)); |
| __ strd(value_lo, Address(IP)); |
| } |
| } else { |
| value = locations->InAt(3).AsRegister<Register>(); |
| Register source = value; |
| if (kPoisonHeapReferences && type == Primitive::kPrimNot) { |
| Register temp = locations->GetTemp(0).AsRegister<Register>(); |
| __ Mov(temp, value); |
| __ PoisonHeapReference(temp); |
| source = temp; |
| } |
| __ str(source, Address(base, offset)); |
| } |
| |
| if (is_volatile) { |
| __ dmb(ISH); |
| } |
| |
| if (type == Primitive::kPrimNot) { |
| Register temp = locations->GetTemp(0).AsRegister<Register>(); |
| Register card = locations->GetTemp(1).AsRegister<Register>(); |
| bool value_can_be_null = true; // TODO: Worth finding out this information? |
| codegen->MarkGCCard(temp, card, base, value, value_can_be_null); |
| } |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitUnsafePut(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimInt, false, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutOrdered(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimInt, false, true, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutVolatile(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimInt, true, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutObject(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimNot, false, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutObjectOrdered(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimNot, false, true, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutObjectVolatile(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimNot, true, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutLong(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimLong, false, false, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutLongOrdered(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimLong, false, true, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafePutLongVolatile(HInvoke* invoke) { |
| GenUnsafePut(invoke->GetLocations(), Primitive::kPrimLong, true, false, codegen_); |
| } |
| |
| static void CreateIntIntIntIntIntToIntPlusTemps(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()); |
| locations->SetInAt(4, Location::RequiresRegister()); |
| |
| locations->SetOut(Location::RequiresRegister(), Location::kNoOutputOverlap); |
| |
| locations->AddTemp(Location::RequiresRegister()); // Pointer. |
| locations->AddTemp(Location::RequiresRegister()); // Temp 1. |
| locations->AddTemp(Location::RequiresRegister()); // Temp 2. |
| } |
| |
| static void GenCas(LocationSummary* locations, Primitive::Type type, CodeGeneratorARM* codegen) { |
| DCHECK_NE(type, Primitive::kPrimLong); |
| |
| ArmAssembler* assembler = codegen->GetAssembler(); |
| |
| Register out = locations->Out().AsRegister<Register>(); // Boolean result. |
| |
| Register base = locations->InAt(1).AsRegister<Register>(); // Object pointer. |
| Register offset = locations->InAt(2).AsRegisterPairLow<Register>(); // Offset (discard high 4B). |
| Register expected_lo = locations->InAt(3).AsRegister<Register>(); // Expected. |
| Register value_lo = locations->InAt(4).AsRegister<Register>(); // Value. |
| |
| Register tmp_ptr = locations->GetTemp(0).AsRegister<Register>(); // Pointer to actual memory. |
| Register tmp_lo = locations->GetTemp(1).AsRegister<Register>(); // Value in memory. |
| |
| if (type == Primitive::kPrimNot) { |
| // Mark card for object assuming new value is stored. Worst case we will mark an unchanged |
| // object and scan the receiver at the next GC for nothing. |
| bool value_can_be_null = true; // TODO: Worth finding out this information? |
| codegen->MarkGCCard(tmp_ptr, tmp_lo, base, value_lo, value_can_be_null); |
| } |
| |
| // Prevent reordering with prior memory operations. |
| __ dmb(ISH); |
| |
| __ add(tmp_ptr, base, ShifterOperand(offset)); |
| |
| if (kPoisonHeapReferences && type == Primitive::kPrimNot) { |
| codegen->GetAssembler()->PoisonHeapReference(expected_lo); |
| codegen->GetAssembler()->PoisonHeapReference(value_lo); |
| } |
| |
| // do { |
| // tmp = [r_ptr] - expected; |
| // } while (tmp == 0 && failure([r_ptr] <- r_new_value)); |
| // result = tmp != 0; |
| |
| Label loop_head; |
| __ Bind(&loop_head); |
| |
| __ ldrex(tmp_lo, tmp_ptr); |
| |
| __ subs(tmp_lo, tmp_lo, ShifterOperand(expected_lo)); |
| |
| __ it(EQ, ItState::kItT); |
| __ strex(tmp_lo, value_lo, tmp_ptr, EQ); |
| __ cmp(tmp_lo, ShifterOperand(1), EQ); |
| |
| __ b(&loop_head, EQ); |
| |
| __ dmb(ISH); |
| |
| __ rsbs(out, tmp_lo, ShifterOperand(1)); |
| __ it(CC); |
| __ mov(out, ShifterOperand(0), CC); |
| |
| if (kPoisonHeapReferences && type == Primitive::kPrimNot) { |
| codegen->GetAssembler()->UnpoisonHeapReference(value_lo); |
| codegen->GetAssembler()->UnpoisonHeapReference(expected_lo); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitUnsafeCASInt(HInvoke* invoke) { |
| CreateIntIntIntIntIntToIntPlusTemps(arena_, invoke); |
| } |
| void IntrinsicLocationsBuilderARM::VisitUnsafeCASObject(HInvoke* invoke) { |
| CreateIntIntIntIntIntToIntPlusTemps(arena_, invoke); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeCASInt(HInvoke* invoke) { |
| GenCas(invoke->GetLocations(), Primitive::kPrimInt, codegen_); |
| } |
| void IntrinsicCodeGeneratorARM::VisitUnsafeCASObject(HInvoke* invoke) { |
| GenCas(invoke->GetLocations(), Primitive::kPrimNot, codegen_); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringCharAt(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kCallOnSlowPath, |
| kIntrinsified); |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetInAt(1, Location::RequiresRegister()); |
| locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap); |
| |
| locations->AddTemp(Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringCharAt(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| 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 = locations->InAt(0).AsRegister<Register>(); // String object pointer. |
| Register idx = locations->InAt(1).AsRegister<Register>(); // Index of character. |
| Register out = locations->Out().AsRegister<Register>(); // Result character. |
| |
| Register temp = locations->GetTemp(0).AsRegister<Register>(); |
| Register array_temp = locations->GetTemp(1).AsRegister<Register>(); |
| |
| // 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). |
| |
| SlowPathCode* slow_path = new (GetAllocator()) IntrinsicSlowPathARM(invoke); |
| codegen_->AddSlowPath(slow_path); |
| |
| __ ldr(temp, Address(obj, count_offset.Int32Value())); // temp = str.length. |
| codegen_->MaybeRecordImplicitNullCheck(invoke); |
| __ cmp(idx, ShifterOperand(temp)); |
| __ b(slow_path->GetEntryLabel(), CS); |
| |
| __ add(array_temp, obj, ShifterOperand(value_offset.Int32Value())); // array_temp := str.value. |
| |
| // Load the value. |
| __ ldrh(out, Address(array_temp, idx, LSL, 1)); // out := array_temp[idx]. |
| |
| __ Bind(slow_path->GetExitLabel()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringCompareTo(HInvoke* invoke) { |
| // The inputs plus one temp. |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kCall, |
| kIntrinsified); |
| InvokeRuntimeCallingConvention calling_convention; |
| locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringCompareTo(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| LocationSummary* locations = invoke->GetLocations(); |
| |
| // Note that the null check must have been done earlier. |
| DCHECK(!invoke->CanDoImplicitNullCheckOn(invoke->InputAt(0))); |
| |
| Register argument = locations->InAt(1).AsRegister<Register>(); |
| __ cmp(argument, ShifterOperand(0)); |
| SlowPathCode* slow_path = new (GetAllocator()) IntrinsicSlowPathARM(invoke); |
| codegen_->AddSlowPath(slow_path); |
| __ b(slow_path->GetEntryLabel(), EQ); |
| |
| __ LoadFromOffset( |
| kLoadWord, LR, TR, QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pStringCompareTo).Int32Value()); |
| __ blx(LR); |
| __ Bind(slow_path->GetExitLabel()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringEquals(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kNoCall, |
| kIntrinsified); |
| InvokeRuntimeCallingConvention calling_convention; |
| locations->SetInAt(0, Location::RequiresRegister()); |
| locations->SetInAt(1, Location::RequiresRegister()); |
| // Temporary registers to store lengths of strings and for calculations. |
| // Using instruction cbz requires a low register, so explicitly set a temp to be R0. |
| locations->AddTemp(Location::RegisterLocation(R0)); |
| locations->AddTemp(Location::RequiresRegister()); |
| locations->AddTemp(Location::RequiresRegister()); |
| |
| locations->SetOut(Location::RequiresRegister()); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringEquals(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| LocationSummary* locations = invoke->GetLocations(); |
| |
| Register str = locations->InAt(0).AsRegister<Register>(); |
| Register arg = locations->InAt(1).AsRegister<Register>(); |
| Register out = locations->Out().AsRegister<Register>(); |
| |
| Register temp = locations->GetTemp(0).AsRegister<Register>(); |
| Register temp1 = locations->GetTemp(1).AsRegister<Register>(); |
| Register temp2 = locations->GetTemp(2).AsRegister<Register>(); |
| |
| Label loop; |
| Label end; |
| Label return_true; |
| Label return_false; |
| |
| // Get offsets of count, value, and class fields within a string object. |
| const uint32_t count_offset = mirror::String::CountOffset().Uint32Value(); |
| const uint32_t value_offset = mirror::String::ValueOffset().Uint32Value(); |
| const uint32_t class_offset = mirror::Object::ClassOffset().Uint32Value(); |
| |
| // 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. |
| __ CompareAndBranchIfZero(arg, &return_false); |
| |
| // 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, Address(str, class_offset)); |
| __ ldr(temp1, Address(arg, class_offset)); |
| __ cmp(temp, ShifterOperand(temp1)); |
| __ b(&return_false, NE); |
| |
| // Load lengths of this and argument strings. |
| __ ldr(temp, Address(str, count_offset)); |
| __ ldr(temp1, Address(arg, count_offset)); |
| // Check if lengths are equal, return false if they're not. |
| __ cmp(temp, ShifterOperand(temp1)); |
| __ b(&return_false, NE); |
| // Return true if both strings are empty. |
| __ cbz(temp, &return_true); |
| |
| // Reference equality check, return true if same reference. |
| __ cmp(str, ShifterOperand(arg)); |
| __ b(&return_true, EQ); |
| |
| // Assertions that must hold in order to compare strings 2 characters at a time. |
| DCHECK_ALIGNED(value_offset, 4); |
| static_assert(IsAligned<4>(kObjectAlignment), "String of odd length is not zero padded"); |
| |
| __ LoadImmediate(temp1, value_offset); |
| |
| // Loop to compare strings 2 characters at a time starting at the front of the string. |
| // Ok to do this because strings with an odd length are zero-padded. |
| __ Bind(&loop); |
| __ ldr(out, Address(str, temp1)); |
| __ ldr(temp2, Address(arg, temp1)); |
| __ cmp(out, ShifterOperand(temp2)); |
| __ b(&return_false, NE); |
| __ add(temp1, temp1, ShifterOperand(sizeof(uint32_t))); |
| __ subs(temp, temp, ShifterOperand(sizeof(uint32_t) / sizeof(uint16_t))); |
| __ b(&loop, GT); |
| |
| // Return true and exit the function. |
| // If loop does not result in returning false, we return true. |
| __ Bind(&return_true); |
| __ LoadImmediate(out, 1); |
| __ b(&end); |
| |
| // Return false and exit the function. |
| __ Bind(&return_false); |
| __ LoadImmediate(out, 0); |
| __ Bind(&end); |
| } |
| |
| static void GenerateVisitStringIndexOf(HInvoke* invoke, |
| ArmAssembler* assembler, |
| CodeGeneratorARM* codegen, |
| ArenaAllocator* allocator, |
| bool start_at_zero) { |
| LocationSummary* locations = invoke->GetLocations(); |
| Register tmp_reg = locations->GetTemp(0).AsRegister<Register>(); |
| |
| // 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. |
| SlowPathCode* slow_path = nullptr; |
| if (invoke->InputAt(1)->IsIntConstant()) { |
| if (static_cast<uint32_t>(invoke->InputAt(1)->AsIntConstant()->GetValue()) > |
| std::numeric_limits<uint16_t>::max()) { |
| // 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) IntrinsicSlowPathARM(invoke); |
| codegen->AddSlowPath(slow_path); |
| __ b(slow_path->GetEntryLabel()); |
| __ Bind(slow_path->GetExitLabel()); |
| return; |
| } |
| } else { |
| Register char_reg = locations->InAt(1).AsRegister<Register>(); |
| __ LoadImmediate(tmp_reg, std::numeric_limits<uint16_t>::max()); |
| __ cmp(char_reg, ShifterOperand(tmp_reg)); |
| slow_path = new (allocator) IntrinsicSlowPathARM(invoke); |
| codegen->AddSlowPath(slow_path); |
| __ b(slow_path->GetEntryLabel(), HI); |
| } |
| |
| if (start_at_zero) { |
| DCHECK_EQ(tmp_reg, R2); |
| // Start-index = 0. |
| __ LoadImmediate(tmp_reg, 0); |
| } |
| |
| __ LoadFromOffset(kLoadWord, LR, TR, |
| QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pIndexOf).Int32Value()); |
| __ blx(LR); |
| |
| if (slow_path != nullptr) { |
| __ Bind(slow_path->GetExitLabel()); |
| } |
| } |
| |
| void IntrinsicLocationsBuilderARM::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, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| |
| // Need a temp for slow-path codepoint compare, and need to send start-index=0. |
| locations->AddTemp(Location::RegisterLocation(calling_convention.GetRegisterAt(2))); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringIndexOf(HInvoke* invoke) { |
| GenerateVisitStringIndexOf(invoke, GetAssembler(), codegen_, GetAllocator(), true); |
| } |
| |
| void IntrinsicLocationsBuilderARM::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, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1))); |
| locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| |
| // Need a temp for slow-path codepoint compare. |
| locations->AddTemp(Location::RequiresRegister()); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringIndexOfAfter(HInvoke* invoke) { |
| GenerateVisitStringIndexOf(invoke, GetAssembler(), codegen_, GetAllocator(), false); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringNewStringFromBytes(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kCall, |
| kIntrinsified); |
| InvokeRuntimeCallingConvention calling_convention; |
| locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1))); |
| locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2))); |
| locations->SetInAt(3, Location::RegisterLocation(calling_convention.GetRegisterAt(3))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringNewStringFromBytes(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| LocationSummary* locations = invoke->GetLocations(); |
| |
| Register byte_array = locations->InAt(0).AsRegister<Register>(); |
| __ cmp(byte_array, ShifterOperand(0)); |
| SlowPathCode* slow_path = new (GetAllocator()) IntrinsicSlowPathARM(invoke); |
| codegen_->AddSlowPath(slow_path); |
| __ b(slow_path->GetEntryLabel(), EQ); |
| |
| __ LoadFromOffset( |
| kLoadWord, LR, TR, QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAllocStringFromBytes).Int32Value()); |
| codegen_->RecordPcInfo(invoke, invoke->GetDexPc()); |
| __ blx(LR); |
| __ Bind(slow_path->GetExitLabel()); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringNewStringFromChars(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kCall, |
| kIntrinsified); |
| InvokeRuntimeCallingConvention calling_convention; |
| locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetInAt(1, Location::RegisterLocation(calling_convention.GetRegisterAt(1))); |
| locations->SetInAt(2, Location::RegisterLocation(calling_convention.GetRegisterAt(2))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringNewStringFromChars(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| |
| __ LoadFromOffset( |
| kLoadWord, LR, TR, QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAllocStringFromChars).Int32Value()); |
| codegen_->RecordPcInfo(invoke, invoke->GetDexPc()); |
| __ blx(LR); |
| } |
| |
| void IntrinsicLocationsBuilderARM::VisitStringNewStringFromString(HInvoke* invoke) { |
| LocationSummary* locations = new (arena_) LocationSummary(invoke, |
| LocationSummary::kCall, |
| kIntrinsified); |
| InvokeRuntimeCallingConvention calling_convention; |
| locations->SetInAt(0, Location::RegisterLocation(calling_convention.GetRegisterAt(0))); |
| locations->SetOut(Location::RegisterLocation(R0)); |
| } |
| |
| void IntrinsicCodeGeneratorARM::VisitStringNewStringFromString(HInvoke* invoke) { |
| ArmAssembler* assembler = GetAssembler(); |
| LocationSummary* locations = invoke->GetLocations(); |
| |
| Register string_to_copy = locations->InAt(0).AsRegister<Register>(); |
| __ cmp(string_to_copy, ShifterOperand(0)); |
| SlowPathCode* slow_path = new (GetAllocator()) IntrinsicSlowPathARM(invoke); |
| codegen_->AddSlowPath(slow_path); |
| __ b(slow_path->GetEntryLabel(), EQ); |
| |
| __ LoadFromOffset(kLoadWord, |
| LR, TR, QUICK_ENTRYPOINT_OFFSET(kArmWordSize, pAllocStringFromString).Int32Value()); |
| codegen_->RecordPcInfo(invoke, invoke->GetDexPc()); |
| __ blx(LR); |
| __ Bind(slow_path->GetExitLabel()); |
| } |
| |
| // Unimplemented intrinsics. |
| |
| #define UNIMPLEMENTED_INTRINSIC(Name) \ |
| void IntrinsicLocationsBuilderARM::Visit ## Name(HInvoke* invoke ATTRIBUTE_UNUSED) { \ |
| } \ |
| void IntrinsicCodeGeneratorARM::Visit ## Name(HInvoke* invoke ATTRIBUTE_UNUSED) { \ |
| } |
| |
| UNIMPLEMENTED_INTRINSIC(IntegerReverse) |
| UNIMPLEMENTED_INTRINSIC(IntegerReverseBytes) |
| UNIMPLEMENTED_INTRINSIC(LongReverse) |
| UNIMPLEMENTED_INTRINSIC(LongReverseBytes) |
| UNIMPLEMENTED_INTRINSIC(ShortReverseBytes) |
| UNIMPLEMENTED_INTRINSIC(MathMinDoubleDouble) |
| UNIMPLEMENTED_INTRINSIC(MathMinFloatFloat) |
| UNIMPLEMENTED_INTRINSIC(MathMaxDoubleDouble) |
| UNIMPLEMENTED_INTRINSIC(MathMaxFloatFloat) |
| UNIMPLEMENTED_INTRINSIC(MathMinLongLong) |
| UNIMPLEMENTED_INTRINSIC(MathMaxLongLong) |
| UNIMPLEMENTED_INTRINSIC(MathCeil) // Could be done by changing rounding mode, maybe? |
| UNIMPLEMENTED_INTRINSIC(MathFloor) // Could be done by changing rounding mode, maybe? |
| UNIMPLEMENTED_INTRINSIC(MathRint) |
| UNIMPLEMENTED_INTRINSIC(MathRoundDouble) // Could be done by changing rounding mode, maybe? |
| UNIMPLEMENTED_INTRINSIC(MathRoundFloat) // Could be done by changing rounding mode, maybe? |
| UNIMPLEMENTED_INTRINSIC(UnsafeCASLong) // High register pressure. |
| UNIMPLEMENTED_INTRINSIC(SystemArrayCopyChar) |
| UNIMPLEMENTED_INTRINSIC(ReferenceGetReferent) |
| UNIMPLEMENTED_INTRINSIC(StringGetCharsNoCheck) |
| |
| #undef UNIMPLEMENTED_INTRINSIC |
| |
| #undef __ |
| |
| } // namespace arm |
| } // namespace art |
