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 enum MipsABIEnum { 31 O32, O64, N32, N64, EABI 32 }; 33 34 protected: 35 36 enum MipsArchEnum { 37 Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2 38 }; 39 40 // Mips architecture version 41 MipsArchEnum MipsArchVersion; 42 43 // Mips supported ABIs 44 MipsABIEnum MipsABI; 45 46 // IsLittle - The target is Little Endian 47 bool IsLittle; 48 49 // IsSingleFloat - The target only supports single precision float 50 // point operations. This enable the target to use all 32 32-bit 51 // floating point registers instead of only using even ones. 52 bool IsSingleFloat; 53 54 // IsFP64bit - The target processor has 64-bit floating point registers. 55 bool IsFP64bit; 56 57 // IsFP64bit - General-purpose registers are 64 bits wide 58 bool IsGP64bit; 59 60 // HasVFPU - Processor has a vector floating point unit. 61 bool HasVFPU; 62 63 // isLinux - Target system is Linux. Is false we consider ELFOS for now. 64 bool IsLinux; 65 66 /// Features related to the presence of specific instructions. 67 68 // HasSEInReg - SEB and SEH (signext in register) instructions. 69 bool HasSEInReg; 70 71 // HasCondMov - Conditional mov (MOVZ, MOVN) instructions. 72 bool HasCondMov; 73 74 // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu) 75 // instructions. 76 bool HasMulDivAdd; 77 78 // HasMinMax - MIN and MAX instructions. 79 bool HasMinMax; 80 81 // HasSwap - Byte and half swap instructions. 82 bool HasSwap; 83 84 // HasBitCount - Count leading '1' and '0' bits. 85 bool HasBitCount; 86 87 InstrItineraryData InstrItins; 88 89 public: 90 91 /// Only O32 and EABI supported right now. isABI_EABI()92 bool isABI_EABI() const { return MipsABI == EABI; } isABI_O32()93 bool isABI_O32() const { return MipsABI == O32; } getTargetABI()94 unsigned getTargetABI() const { return MipsABI; } 95 96 /// This constructor initializes the data members to match that 97 /// of the specified triple. 98 MipsSubtarget(const std::string &TT, const std::string &CPU, 99 const std::string &FS, bool little); 100 101 /// ParseSubtargetFeatures - Parses features string setting specified 102 /// subtarget options. Definition of function is auto generated by tblgen. 103 void ParseSubtargetFeatures(StringRef CPU, StringRef FS); 104 isMips1()105 bool isMips1() const { return MipsArchVersion == Mips1; } isMips32()106 bool isMips32() const { return MipsArchVersion >= Mips32; } isMips32r2()107 bool isMips32r2() const { return MipsArchVersion == Mips32r2; } 108 isLittle()109 bool isLittle() const { return IsLittle; } isFP64bit()110 bool isFP64bit() const { return IsFP64bit; } isGP64bit()111 bool isGP64bit() const { return IsGP64bit; } isGP32bit()112 bool isGP32bit() const { return !IsGP64bit; } isSingleFloat()113 bool isSingleFloat() const { return IsSingleFloat; } isNotSingleFloat()114 bool isNotSingleFloat() const { return !IsSingleFloat; } hasVFPU()115 bool hasVFPU() const { return HasVFPU; } isLinux()116 bool isLinux() const { return IsLinux; } 117 118 /// Features related to the presence of specific instructions. hasSEInReg()119 bool hasSEInReg() const { return HasSEInReg; } hasCondMov()120 bool hasCondMov() const { return HasCondMov; } hasMulDivAdd()121 bool hasMulDivAdd() const { return HasMulDivAdd; } hasMinMax()122 bool hasMinMax() const { return HasMinMax; } hasSwap()123 bool hasSwap() const { return HasSwap; } hasBitCount()124 bool hasBitCount() const { return HasBitCount; } 125 }; 126 } // End llvm namespace 127 128 #endif 129