1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ART_COMPILER_OPTIMIZING_NODES_ARM64_H_ 18 #define ART_COMPILER_OPTIMIZING_NODES_ARM64_H_ 19 20 #include "nodes.h" 21 22 namespace art { 23 24 class HArm64DataProcWithShifterOp : public HExpression<2> { 25 public: 26 enum OpKind { 27 kLSL, // Logical shift left. 28 kLSR, // Logical shift right. 29 kASR, // Arithmetic shift right. 30 kUXTB, // Unsigned extend byte. 31 kUXTH, // Unsigned extend half-word. 32 kUXTW, // Unsigned extend word. 33 kSXTB, // Signed extend byte. 34 kSXTH, // Signed extend half-word. 35 kSXTW, // Signed extend word. 36 37 // Aliases. 38 kFirstShiftOp = kLSL, 39 kLastShiftOp = kASR, 40 kFirstExtensionOp = kUXTB, 41 kLastExtensionOp = kSXTW 42 }; 43 HArm64DataProcWithShifterOp(HInstruction* instr, 44 HInstruction* left, 45 HInstruction* right, 46 OpKind op, 47 // The shift argument is unused if the operation 48 // is an extension. 49 int shift = 0, 50 uint32_t dex_pc = kNoDexPc) 51 : HExpression(instr->GetType(), SideEffects::None(), dex_pc), 52 instr_kind_(instr->GetKind()), op_kind_(op), shift_amount_(shift) { 53 DCHECK(!instr->HasSideEffects()); 54 SetRawInputAt(0, left); 55 SetRawInputAt(1, right); 56 } 57 CanBeMoved()58 bool CanBeMoved() const OVERRIDE { return true; } InstructionDataEquals(HInstruction * other_instr)59 bool InstructionDataEquals(HInstruction* other_instr) const OVERRIDE { 60 HArm64DataProcWithShifterOp* other = other_instr->AsArm64DataProcWithShifterOp(); 61 return instr_kind_ == other->instr_kind_ && 62 op_kind_ == other->op_kind_ && 63 shift_amount_ == other->shift_amount_; 64 } 65 IsShiftOp(OpKind op_kind)66 static bool IsShiftOp(OpKind op_kind) { 67 return kFirstShiftOp <= op_kind && op_kind <= kLastShiftOp; 68 } 69 IsExtensionOp(OpKind op_kind)70 static bool IsExtensionOp(OpKind op_kind) { 71 return kFirstExtensionOp <= op_kind && op_kind <= kLastExtensionOp; 72 } 73 74 // Find the operation kind and shift amount from a bitfield move instruction. 75 static void GetOpInfoFromInstruction(HInstruction* bitfield_op, 76 /*out*/OpKind* op_kind, 77 /*out*/int* shift_amount); 78 GetInstrKind()79 InstructionKind GetInstrKind() const { return instr_kind_; } GetOpKind()80 OpKind GetOpKind() const { return op_kind_; } GetShiftAmount()81 int GetShiftAmount() const { return shift_amount_; } 82 83 DECLARE_INSTRUCTION(Arm64DataProcWithShifterOp); 84 85 private: 86 InstructionKind instr_kind_; 87 OpKind op_kind_; 88 int shift_amount_; 89 90 friend std::ostream& operator<<(std::ostream& os, OpKind op); 91 92 DISALLOW_COPY_AND_ASSIGN(HArm64DataProcWithShifterOp); 93 }; 94 95 std::ostream& operator<<(std::ostream& os, const HArm64DataProcWithShifterOp::OpKind op); 96 97 // This instruction computes an intermediate address pointing in the 'middle' of an object. The 98 // result pointer cannot be handled by GC, so extra care is taken to make sure that this value is 99 // never used across anything that can trigger GC. 100 class HArm64IntermediateAddress : public HExpression<2> { 101 public: HArm64IntermediateAddress(HInstruction * base_address,HInstruction * offset,uint32_t dex_pc)102 HArm64IntermediateAddress(HInstruction* base_address, HInstruction* offset, uint32_t dex_pc) 103 : HExpression(Primitive::kPrimNot, SideEffects::DependsOnGC(), dex_pc) { 104 SetRawInputAt(0, base_address); 105 SetRawInputAt(1, offset); 106 } 107 CanBeMoved()108 bool CanBeMoved() const OVERRIDE { return true; } InstructionDataEquals(HInstruction * other ATTRIBUTE_UNUSED)109 bool InstructionDataEquals(HInstruction* other ATTRIBUTE_UNUSED) const OVERRIDE { return true; } IsActualObject()110 bool IsActualObject() const OVERRIDE { return false; } 111 GetBaseAddress()112 HInstruction* GetBaseAddress() const { return InputAt(0); } GetOffset()113 HInstruction* GetOffset() const { return InputAt(1); } 114 115 DECLARE_INSTRUCTION(Arm64IntermediateAddress); 116 117 private: 118 DISALLOW_COPY_AND_ASSIGN(HArm64IntermediateAddress); 119 }; 120 121 } // namespace art 122 123 #endif // ART_COMPILER_OPTIMIZING_NODES_ARM64_H_ 124