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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.
*/
#ifndef ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
#define ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
#include "nodes.h"
namespace art {
class HArm64DataProcWithShifterOp : public HExpression<2> {
public:
enum OpKind {
kLSL, // Logical shift left.
kLSR, // Logical shift right.
kASR, // Arithmetic shift right.
kUXTB, // Unsigned extend byte.
kUXTH, // Unsigned extend half-word.
kUXTW, // Unsigned extend word.
kSXTB, // Signed extend byte.
kSXTH, // Signed extend half-word.
kSXTW, // Signed extend word.
// Aliases.
kFirstShiftOp = kLSL,
kLastShiftOp = kASR,
kFirstExtensionOp = kUXTB,
kLastExtensionOp = kSXTW
};
HArm64DataProcWithShifterOp(HInstruction* instr,
HInstruction* left,
HInstruction* right,
OpKind op,
// The shift argument is unused if the operation
// is an extension.
int shift = 0,
uint32_t dex_pc = kNoDexPc)
: HExpression(instr->GetType(), SideEffects::None(), dex_pc),
instr_kind_(instr->GetKind()), op_kind_(op), shift_amount_(shift) {
DCHECK(!instr->HasSideEffects());
SetRawInputAt(0, left);
SetRawInputAt(1, right);
}
bool CanBeMoved() const OVERRIDE { return true; }
bool InstructionDataEquals(HInstruction* other_instr) const OVERRIDE {
HArm64DataProcWithShifterOp* other = other_instr->AsArm64DataProcWithShifterOp();
return instr_kind_ == other->instr_kind_ &&
op_kind_ == other->op_kind_ &&
shift_amount_ == other->shift_amount_;
}
static bool IsShiftOp(OpKind op_kind) {
return kFirstShiftOp <= op_kind && op_kind <= kLastShiftOp;
}
static bool IsExtensionOp(OpKind op_kind) {
return kFirstExtensionOp <= op_kind && op_kind <= kLastExtensionOp;
}
// Find the operation kind and shift amount from a bitfield move instruction.
static void GetOpInfoFromInstruction(HInstruction* bitfield_op,
/*out*/OpKind* op_kind,
/*out*/int* shift_amount);
InstructionKind GetInstrKind() const { return instr_kind_; }
OpKind GetOpKind() const { return op_kind_; }
int GetShiftAmount() const { return shift_amount_; }
DECLARE_INSTRUCTION(Arm64DataProcWithShifterOp);
private:
InstructionKind instr_kind_;
OpKind op_kind_;
int shift_amount_;
friend std::ostream& operator<<(std::ostream& os, OpKind op);
DISALLOW_COPY_AND_ASSIGN(HArm64DataProcWithShifterOp);
};
std::ostream& operator<<(std::ostream& os, const HArm64DataProcWithShifterOp::OpKind op);
// This instruction computes an intermediate address pointing in the 'middle' of an object. The
// result pointer cannot be handled by GC, so extra care is taken to make sure that this value is
// never used across anything that can trigger GC.
class HArm64IntermediateAddress : public HExpression<2> {
public:
HArm64IntermediateAddress(HInstruction* base_address, HInstruction* offset, uint32_t dex_pc)
: HExpression(Primitive::kPrimNot, SideEffects::DependsOnGC(), dex_pc) {
SetRawInputAt(0, base_address);
SetRawInputAt(1, offset);
}
bool CanBeMoved() const OVERRIDE { return true; }
bool InstructionDataEquals(HInstruction* other ATTRIBUTE_UNUSED) const OVERRIDE { return true; }
bool IsActualObject() const OVERRIDE { return false; }
HInstruction* GetBaseAddress() const { return InputAt(0); }
HInstruction* GetOffset() const { return InputAt(1); }
DECLARE_INSTRUCTION(Arm64IntermediateAddress);
private:
DISALLOW_COPY_AND_ASSIGN(HArm64IntermediateAddress);
};
class HArm64BitwiseNegatedRight : public HBinaryOperation {
public:
HArm64BitwiseNegatedRight(Primitive::Type result_type,
InstructionKind op,
HInstruction* left,
HInstruction* right,
uint32_t dex_pc = kNoDexPc)
: HBinaryOperation(result_type, left, right, SideEffects::None(), dex_pc),
op_kind_(op) {
DCHECK(op == HInstruction::kAnd || op == HInstruction::kOr || op == HInstruction::kXor) << op;
}
template <typename T, typename U>
auto Compute(T x, U y) const -> decltype(x & ~y) {
static_assert(std::is_same<decltype(x & ~y), decltype(x | ~y)>::value &&
std::is_same<decltype(x & ~y), decltype(x ^ ~y)>::value,
"Inconsistent negated bitwise types");
switch (op_kind_) {
case HInstruction::kAnd:
return x & ~y;
case HInstruction::kOr:
return x | ~y;
case HInstruction::kXor:
return x ^ ~y;
default:
LOG(FATAL) << "Unreachable";
UNREACHABLE();
}
}
HConstant* Evaluate(HIntConstant* x, HIntConstant* y) const OVERRIDE {
return GetBlock()->GetGraph()->GetIntConstant(
Compute(x->GetValue(), y->GetValue()), GetDexPc());
}
HConstant* Evaluate(HLongConstant* x, HLongConstant* y) const OVERRIDE {
return GetBlock()->GetGraph()->GetLongConstant(
Compute(x->GetValue(), y->GetValue()), GetDexPc());
}
HConstant* Evaluate(HFloatConstant* x ATTRIBUTE_UNUSED,
HFloatConstant* y ATTRIBUTE_UNUSED) const OVERRIDE {
LOG(FATAL) << DebugName() << " is not defined for float values";
UNREACHABLE();
}
HConstant* Evaluate(HDoubleConstant* x ATTRIBUTE_UNUSED,
HDoubleConstant* y ATTRIBUTE_UNUSED) const OVERRIDE {
LOG(FATAL) << DebugName() << " is not defined for double values";
UNREACHABLE();
}
InstructionKind GetOpKind() const { return op_kind_; }
DECLARE_INSTRUCTION(Arm64BitwiseNegatedRight);
private:
// Specifies the bitwise operation, which will be then negated.
const InstructionKind op_kind_;
DISALLOW_COPY_AND_ASSIGN(HArm64BitwiseNegatedRight);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
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