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_MIPS64_CONSTANTS_MIPS64_H_ 18 #define ART_COMPILER_UTILS_MIPS64_CONSTANTS_MIPS64_H_ 19 20 #include <iosfwd> 21 22 #include "arch/mips64/registers_mips64.h" 23 #include "base/logging.h" 24 #include "base/macros.h" 25 #include "globals.h" 26 27 namespace art { 28 namespace mips64 { 29 30 // Constants used for the decoding or encoding of the individual fields of instructions. 31 enum InstructionFields { 32 kOpcodeShift = 26, 33 kOpcodeBits = 6, 34 kRsShift = 21, 35 kRsBits = 5, 36 kRtShift = 16, 37 kRtBits = 5, 38 kRdShift = 11, 39 kRdBits = 5, 40 kShamtShift = 6, 41 kShamtBits = 5, 42 kFunctShift = 0, 43 kFunctBits = 6, 44 45 kFmtShift = 21, 46 kFmtBits = 5, 47 kFtShift = 16, 48 kFtBits = 5, 49 kFsShift = 11, 50 kFsBits = 5, 51 kFdShift = 6, 52 kFdBits = 5, 53 54 kBranchOffsetMask = 0x0000ffff, 55 kJumpOffsetMask = 0x03ffffff, 56 }; 57 58 enum ScaleFactor { 59 TIMES_1 = 0, 60 TIMES_2 = 1, 61 TIMES_4 = 2, 62 TIMES_8 = 3 63 }; 64 65 class Instr { 66 public: 67 static const uint32_t kBreakPointInstruction = 0x0000000D; 68 69 bool IsBreakPoint() { 70 return ((*reinterpret_cast<const uint32_t*>(this)) & 0xFC00003F) == kBreakPointInstruction; 71 } 72 73 // Instructions are read out of a code stream. The only way to get a 74 // reference to an instruction is to convert a pointer. There is no way 75 // to allocate or create instances of class Instr. 76 // Use the At(pc) function to create references to Instr. 77 static Instr* At(uintptr_t pc) { return reinterpret_cast<Instr*>(pc); } 78 79 private: 80 DISALLOW_IMPLICIT_CONSTRUCTORS(Instr); 81 }; 82 83 } // namespace mips64 84 } // namespace art 85 86 #endif // ART_COMPILER_UTILS_MIPS64_CONSTANTS_MIPS64_H_ 87
