1 /* 2 * Copyright (C) 2014 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_UTILS_X86_64_CONSTANTS_X86_64_H_ 18 #define ART_COMPILER_UTILS_X86_64_CONSTANTS_X86_64_H_ 19 20 #include <iosfwd> 21 22 #include <android-base/logging.h> 23 24 #include "arch/x86_64/registers_x86_64.h" 25 #include "base/globals.h" 26 #include "base/macros.h" 27 28 namespace art { 29 namespace x86_64 { 30 31 class CpuRegister { 32 public: CpuRegister(Register r)33 explicit constexpr CpuRegister(Register r) : reg_(r) {} CpuRegister(int r)34 explicit constexpr CpuRegister(int r) : reg_(Register(r)) {} AsRegister()35 constexpr Register AsRegister() const { 36 return reg_; 37 } LowBits()38 constexpr uint8_t LowBits() const { 39 return reg_ & 7; 40 } NeedsRex()41 constexpr bool NeedsRex() const { 42 return reg_ > 7; 43 } 44 private: 45 const Register reg_; 46 }; 47 std::ostream& operator<<(std::ostream& os, const CpuRegister& reg); 48 49 class XmmRegister { 50 public: XmmRegister(FloatRegister r)51 explicit constexpr XmmRegister(FloatRegister r) : reg_(r) {} XmmRegister(int r)52 explicit constexpr XmmRegister(int r) : reg_(FloatRegister(r)) {} AsFloatRegister()53 constexpr FloatRegister AsFloatRegister() const { 54 return reg_; 55 } LowBits()56 constexpr uint8_t LowBits() const { 57 return reg_ & 7; 58 } NeedsRex()59 constexpr bool NeedsRex() const { 60 return reg_ > 7; 61 } 62 private: 63 const FloatRegister reg_; 64 }; 65 std::ostream& operator<<(std::ostream& os, const XmmRegister& reg); 66 67 enum X87Register { 68 ST0 = 0, 69 ST1 = 1, 70 ST2 = 2, 71 ST3 = 3, 72 ST4 = 4, 73 ST5 = 5, 74 ST6 = 6, 75 ST7 = 7, 76 kNumberOfX87Registers = 8, 77 kNoX87Register = -1 // Signals an illegal register. 78 }; 79 std::ostream& operator<<(std::ostream& os, const X87Register& reg); 80 81 enum ScaleFactor { 82 TIMES_1 = 0, 83 TIMES_2 = 1, 84 TIMES_4 = 2, 85 TIMES_8 = 3 86 }; 87 88 enum Condition { 89 kOverflow = 0, 90 kNoOverflow = 1, 91 kBelow = 2, 92 kAboveEqual = 3, 93 kEqual = 4, 94 kNotEqual = 5, 95 kBelowEqual = 6, 96 kAbove = 7, 97 kSign = 8, 98 kNotSign = 9, 99 kParityEven = 10, 100 kParityOdd = 11, 101 kLess = 12, 102 kGreaterEqual = 13, 103 kLessEqual = 14, 104 kGreater = 15, 105 106 kZero = kEqual, 107 kNotZero = kNotEqual, 108 kNegative = kSign, 109 kPositive = kNotSign, 110 kCarrySet = kBelow, 111 kCarryClear = kAboveEqual, 112 kUnordered = kParityEven 113 }; 114 115 116 class Instr { 117 public: 118 static const uint8_t kHltInstruction = 0xF4; 119 // We prefer not to use the int3 instruction since it conflicts with gdb. 120 static const uint8_t kBreakPointInstruction = kHltInstruction; 121 IsBreakPoint()122 bool IsBreakPoint() { 123 return (*reinterpret_cast<const uint8_t*>(this)) == kBreakPointInstruction; 124 } 125 126 // Instructions are read out of a code stream. The only way to get a 127 // reference to an instruction is to convert a pointer. There is no way 128 // to allocate or create instances of class Instr. 129 // Use the At(pc) function to create references to Instr. At(uintptr_t pc)130 static Instr* At(uintptr_t pc) { return reinterpret_cast<Instr*>(pc); } 131 132 private: 133 DISALLOW_IMPLICIT_CONSTRUCTORS(Instr); 134 }; 135 136 } // namespace x86_64 137 } // namespace art 138 139 #endif // ART_COMPILER_UTILS_X86_64_CONSTANTS_X86_64_H_ 140