1 /* 2 * Copyright (C) 2011 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_CONSTANTS_X86_H_ 18 #define ART_COMPILER_UTILS_X86_CONSTANTS_X86_H_ 19 20 #include <iosfwd> 21 22 #include <android-base/logging.h> 23 24 #include "arch/x86/registers_x86.h" 25 #include "base/globals.h" 26 #include "base/macros.h" 27 28 namespace art { 29 namespace x86 { 30 31 enum ByteRegister { 32 AL = 0, 33 CL = 1, 34 DL = 2, 35 BL = 3, 36 AH = 4, 37 CH = 5, 38 DH = 6, 39 BH = 7, 40 kNoByteRegister = -1 // Signals an illegal register. 41 }; 42 43 enum X87Register { 44 ST0 = 0, 45 ST1 = 1, 46 ST2 = 2, 47 ST3 = 3, 48 ST4 = 4, 49 ST5 = 5, 50 ST6 = 6, 51 ST7 = 7, 52 kNumberOfX87Registers = 8, 53 kNoX87Register = -1 // Signals an illegal register. 54 }; 55 std::ostream& operator<<(std::ostream& os, const X87Register& reg); 56 57 enum ScaleFactor { 58 TIMES_1 = 0, 59 TIMES_2 = 1, 60 TIMES_4 = 2, 61 TIMES_8 = 3 62 }; 63 64 enum Condition { 65 kOverflow = 0, 66 kNoOverflow = 1, 67 kBelow = 2, 68 kAboveEqual = 3, 69 kEqual = 4, 70 kNotEqual = 5, 71 kBelowEqual = 6, 72 kAbove = 7, 73 kSign = 8, 74 kNotSign = 9, 75 kParityEven = 10, 76 kParityOdd = 11, 77 kLess = 12, 78 kGreaterEqual = 13, 79 kLessEqual = 14, 80 kGreater = 15, 81 82 kZero = kEqual, 83 kNotZero = kNotEqual, 84 kNegative = kSign, 85 kPositive = kNotSign, 86 kCarrySet = kBelow, 87 kCarryClear = kAboveEqual, 88 kUnordered = kParityEven 89 }; 90 91 92 class Instr { 93 public: 94 static const uint8_t kHltInstruction = 0xF4; 95 // We prefer not to use the int3 instruction since it conflicts with gdb. 96 static const uint8_t kBreakPointInstruction = kHltInstruction; 97 IsBreakPoint()98 bool IsBreakPoint() { 99 return (*reinterpret_cast<const uint8_t*>(this)) == kBreakPointInstruction; 100 } 101 102 // Instructions are read out of a code stream. The only way to get a 103 // reference to an instruction is to convert a pointer. There is no way 104 // to allocate or create instances of class Instr. 105 // Use the At(pc) function to create references to Instr. At(uintptr_t pc)106 static Instr* At(uintptr_t pc) { return reinterpret_cast<Instr*>(pc); } 107 108 private: 109 DISALLOW_IMPLICIT_CONSTRUCTORS(Instr); 110 }; 111 112 } // namespace x86 113 } // namespace art 114 115 #endif // ART_COMPILER_UTILS_X86_CONSTANTS_X86_H_ 116