123 lines
4.3 KiB
C++
123 lines
4.3 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
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#define ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
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#include "nodes.h"
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namespace art {
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class HArm64DataProcWithShifterOp : public HExpression<2> {
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public:
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enum OpKind {
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kLSL, // Logical shift left.
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kLSR, // Logical shift right.
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kASR, // Arithmetic shift right.
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kUXTB, // Unsigned extend byte.
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kUXTH, // Unsigned extend half-word.
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kUXTW, // Unsigned extend word.
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kSXTB, // Signed extend byte.
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kSXTH, // Signed extend half-word.
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kSXTW, // Signed extend word.
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// Aliases.
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kFirstShiftOp = kLSL,
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kLastShiftOp = kASR,
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kFirstExtensionOp = kUXTB,
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kLastExtensionOp = kSXTW
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};
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HArm64DataProcWithShifterOp(HInstruction* instr,
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HInstruction* left,
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HInstruction* right,
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OpKind op,
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// The shift argument is unused if the operation
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// is an extension.
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int shift = 0,
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uint32_t dex_pc = kNoDexPc)
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: HExpression(instr->GetType(), SideEffects::None(), dex_pc),
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instr_kind_(instr->GetKind()), op_kind_(op), shift_amount_(shift) {
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DCHECK(!instr->HasSideEffects());
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SetRawInputAt(0, left);
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SetRawInputAt(1, right);
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}
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(HInstruction* other_instr) const OVERRIDE {
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HArm64DataProcWithShifterOp* other = other_instr->AsArm64DataProcWithShifterOp();
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return instr_kind_ == other->instr_kind_ &&
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op_kind_ == other->op_kind_ &&
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shift_amount_ == other->shift_amount_;
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}
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static bool IsShiftOp(OpKind op_kind) {
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return kFirstShiftOp <= op_kind && op_kind <= kLastShiftOp;
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}
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static bool IsExtensionOp(OpKind op_kind) {
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return kFirstExtensionOp <= op_kind && op_kind <= kLastExtensionOp;
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}
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// Find the operation kind and shift amount from a bitfield move instruction.
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static void GetOpInfoFromInstruction(HInstruction* bitfield_op,
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/*out*/OpKind* op_kind,
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/*out*/int* shift_amount);
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InstructionKind GetInstrKind() const { return instr_kind_; }
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OpKind GetOpKind() const { return op_kind_; }
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int GetShiftAmount() const { return shift_amount_; }
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DECLARE_INSTRUCTION(Arm64DataProcWithShifterOp);
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private:
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InstructionKind instr_kind_;
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OpKind op_kind_;
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int shift_amount_;
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friend std::ostream& operator<<(std::ostream& os, OpKind op);
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DISALLOW_COPY_AND_ASSIGN(HArm64DataProcWithShifterOp);
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};
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std::ostream& operator<<(std::ostream& os, const HArm64DataProcWithShifterOp::OpKind op);
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// This instruction computes an intermediate address pointing in the 'middle' of an object. The
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// result pointer cannot be handled by GC, so extra care is taken to make sure that this value is
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// never used across anything that can trigger GC.
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class HArm64IntermediateAddress : public HExpression<2> {
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public:
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HArm64IntermediateAddress(HInstruction* base_address, HInstruction* offset, uint32_t dex_pc)
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: HExpression(Primitive::kPrimNot, SideEffects::DependsOnGC(), dex_pc) {
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SetRawInputAt(0, base_address);
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SetRawInputAt(1, offset);
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}
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(HInstruction* other ATTRIBUTE_UNUSED) const OVERRIDE { return true; }
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bool IsActualObject() const OVERRIDE { return false; }
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HInstruction* GetBaseAddress() const { return InputAt(0); }
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HInstruction* GetOffset() const { return InputAt(1); }
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DECLARE_INSTRUCTION(Arm64IntermediateAddress);
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private:
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DISALLOW_COPY_AND_ASSIGN(HArm64IntermediateAddress);
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};
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_NODES_ARM64_H_
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