1 //=====-- MipsSubtarget.h - Define Subtarget for the Mips -----*- C++ -*--====// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file declares the Mips specific subclass of TargetSubtargetInfo. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef MIPSSUBTARGET_H 15 #define MIPSSUBTARGET_H 16 17 #include "llvm/Target/TargetSubtargetInfo.h" 18 #include "llvm/MC/MCInstrItineraries.h" 19 #include <string> 20 21 #define GET_SUBTARGETINFO_HEADER 22 #include "MipsGenSubtargetInfo.inc" 23 24 namespace llvm { 25 class StringRef; 26 27 class MipsSubtarget : public MipsGenSubtargetInfo { 28 29 public: 30 // NOTE: O64 will not be supported. 31 enum MipsABIEnum { 32 UnknownABI, O32, N32, N64, EABI 33 }; 34 35 protected: 36 37 enum MipsArchEnum { 38 Mips32, Mips32r2, Mips64, Mips64r2 39 }; 40 41 // Mips architecture version 42 MipsArchEnum MipsArchVersion; 43 44 // Mips supported ABIs 45 MipsABIEnum MipsABI; 46 47 // IsLittle - The target is Little Endian 48 bool IsLittle; 49 50 // IsSingleFloat - The target only supports single precision float 51 // point operations. This enable the target to use all 32 32-bit 52 // floating point registers instead of only using even ones. 53 bool IsSingleFloat; 54 55 // IsFP64bit - The target processor has 64-bit floating point registers. 56 bool IsFP64bit; 57 58 // IsFP64bit - General-purpose registers are 64 bits wide 59 bool IsGP64bit; 60 61 // HasVFPU - Processor has a vector floating point unit. 62 bool HasVFPU; 63 64 // isLinux - Target system is Linux. Is false we consider ELFOS for now. 65 bool IsLinux; 66 67 /// Features related to the presence of specific instructions. 68 69 // HasSEInReg - SEB and SEH (signext in register) instructions. 70 bool HasSEInReg; 71 72 // HasCondMov - Conditional mov (MOVZ, MOVN) instructions. 73 bool HasCondMov; 74 75 // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu) 76 // instructions. 77 bool HasMulDivAdd; 78 79 // HasMinMax - MIN and MAX instructions. 80 bool HasMinMax; 81 82 // HasSwap - Byte and half swap instructions. 83 bool HasSwap; 84 85 // HasBitCount - Count leading '1' and '0' bits. 86 bool HasBitCount; 87 88 InstrItineraryData InstrItins; 89 90 public: 91 92 /// Only O32 and EABI supported right now. isABI_EABI()93 bool isABI_EABI() const { return MipsABI == EABI; } isABI_N64()94 bool isABI_N64() const { return MipsABI == N64; } isABI_N32()95 bool isABI_N32() const { return MipsABI == N32; } isABI_O32()96 bool isABI_O32() const { return MipsABI == O32; } getTargetABI()97 unsigned getTargetABI() const { return MipsABI; } 98 99 /// This constructor initializes the data members to match that 100 /// of the specified triple. 101 MipsSubtarget(const std::string &TT, const std::string &CPU, 102 const std::string &FS, bool little); 103 104 /// ParseSubtargetFeatures - Parses features string setting specified 105 /// subtarget options. Definition of function is auto generated by tblgen. 106 void ParseSubtargetFeatures(StringRef CPU, StringRef FS); 107 hasMips32()108 bool hasMips32() const { return MipsArchVersion >= Mips32; } hasMips32r2()109 bool hasMips32r2() const { return MipsArchVersion == Mips32r2 || 110 MipsArchVersion == Mips64r2; } hasMips64()111 bool hasMips64() const { return MipsArchVersion >= Mips64; } hasMips64r2()112 bool hasMips64r2() const { return MipsArchVersion == Mips64r2; } 113 isLittle()114 bool isLittle() const { return IsLittle; } isFP64bit()115 bool isFP64bit() const { return IsFP64bit; } isGP64bit()116 bool isGP64bit() const { return IsGP64bit; } isGP32bit()117 bool isGP32bit() const { return !IsGP64bit; } isSingleFloat()118 bool isSingleFloat() const { return IsSingleFloat; } isNotSingleFloat()119 bool isNotSingleFloat() const { return !IsSingleFloat; } hasVFPU()120 bool hasVFPU() const { return HasVFPU; } isLinux()121 bool isLinux() const { return IsLinux; } 122 123 /// Features related to the presence of specific instructions. hasSEInReg()124 bool hasSEInReg() const { return HasSEInReg; } hasCondMov()125 bool hasCondMov() const { return HasCondMov; } hasMulDivAdd()126 bool hasMulDivAdd() const { return HasMulDivAdd; } hasMinMax()127 bool hasMinMax() const { return HasMinMax; } hasSwap()128 bool hasSwap() const { return HasSwap; } hasBitCount()129 bool hasBitCount() const { return HasBitCount; } 130 }; 131 } // End llvm namespace 132 133 #endif 134