lib/Target/Mips/MipsSubtarget.h

   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 TargetSubtarget.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef MIPSSUBTARGET_H
  15 #define MIPSSUBTARGET_H
  16
  17 #include "llvm/Target/TargetSubtarget.h"
  18 #include "llvm/Target/TargetMachine.h"
  19
  20 #include <string>
  21
  22 namespace llvm {
  23 class Module;
  24
  25 class MipsSubtarget : public TargetSubtarget {
  26
  27 public:
  28   enum MipsABIEnum {
  29     O32, O64, N32, N64, EABI
  30   };
  31
  32 protected:
  33
  34   enum MipsArchEnum {
  35     Mips1, Mips2, Mips3, Mips4, Mips32, Mips32r2, Mips64, Mips64r2
  36   };
  37
  38   // Mips architecture version
  39   MipsArchEnum MipsArchVersion;
  40
  41   // Mips supported ABIs
  42   MipsABIEnum MipsABI;
  43
  44   // IsLittle - The target is Little Endian
  45   bool IsLittle;
  46
  47   // IsSingleFloat - The target only supports single precision float
  48   // point operations. This enable the target to use all 32 32-bit
  49   // floating point registers instead of only using even ones.
  50   bool IsSingleFloat;
  51
  52   // IsFP64bit - The target processor has 64-bit floating point registers.
  53   bool IsFP64bit;
  54
  55   // IsFP64bit - General-purpose registers are 64 bits wide
  56   bool IsGP64bit;
  57
  58   // HasVFPU - Processor has a vector floating point unit.
  59   bool HasVFPU;
  60
  61   // IsABICall - Enable SRV4 code for SVR4-style dynamic objects
  62   bool HasABICall;
  63
  64   // HasAbsoluteCall - Enable code that is not fully position-independent.
  65   // Only works with HasABICall enabled.
  66   bool HasAbsoluteCall;
  67
  68   // isLinux - Target system is Linux. Is false we consider ELFOS for now.
  69   bool IsLinux;
  70
  71   // Put global and static items less than or equal to SSectionThreshold
  72   // bytes into the small data or bss section. The default is 8.
  73   unsigned SSectionThreshold;
  74
  75   /// Features related to the presence of specific instructions.
  76
  77   // HasSEInReg - SEB and SEH (signext in register) instructions.
  78   bool HasSEInReg;
  79
  80   // HasCondMov - Conditional mov (MOVZ, MOVN) instructions.
  81   bool HasCondMov;
  82
  83   // HasMulDivAdd - Multiply add and sub (MADD, MADDu, MSUB, MSUBu)
  84   // instructions.
  85   bool HasMulDivAdd;
  86
  87   // HasMinMax - MIN and MAX instructions.
  88   bool HasMinMax;
  89
  90   // HasSwap - Byte and half swap instructions.
  91   bool HasSwap;
  92
  93   // HasBitCount - Count leading '1' and '0' bits.
  94   bool HasBitCount;
  95
  96   InstrItineraryData InstrItins;
  97
  98 public:
  99
 100   /// Only O32 and EABI supported right now.
 101   bool isABI_EABI() const { return MipsABI == EABI; }
 102   bool isABI_O32() const { return MipsABI == O32; }
 103   unsigned getTargetABI() const { return MipsABI; }
 104
 105   /// This constructor initializes the data members to match that
 106   /// of the specified module.
 107   MipsSubtarget(const TargetMachine &TM, const Module &M,
 108                 const std::string &FS, bool little);
 109
 110   /// ParseSubtargetFeatures - Parses features string setting specified
 111   /// subtarget options.  Definition of function is auto generated by tblgen.
 112   void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU);
 113
 114   bool hasMips2Ops() const { return MipsArchVersion >= Mips2; }
 115
 116   bool isLittle() const { return IsLittle; }
 117   bool isFP64bit() const { return IsFP64bit; };
 118   bool isGP64bit() const { return IsGP64bit; };
 119   bool isGP32bit() const { return !IsGP64bit; };
 120   bool isSingleFloat() const { return IsSingleFloat; };
 121   bool isNotSingleFloat() const { return !IsSingleFloat; };
 122   bool hasVFPU() const { return HasVFPU; };
 123   bool hasABICall() const { return HasABICall; };
 124   bool hasAbsoluteCall() const { return HasAbsoluteCall; };
 125   bool isLinux() const { return IsLinux; };
 126   unsigned getSSectionThreshold() const { return SSectionThreshold; }
 127
 128   /// Features related to the presence of specific instructions.
 129   bool hasSEInReg()   const { return HasSEInReg; };
 130   bool hasCondMov()   const { return HasCondMov; };
 131   bool hasMulDivAdd() const { return HasMulDivAdd; };
 132   bool hasMinMax()    const { return HasMinMax; };
 133   bool hasSwap()      const { return HasSwap; };
 134   bool hasBitCount()  const { return HasBitCount; };
 135 };
 136 } // End llvm namespace
 137
 138 #endif