lib/Target/Mips/MipsSubtarget.cpp

   1 //===- MipsSubtarget.cpp - Mips Subtarget Information -----------*- 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 implements the Mips specific subclass of TargetSubtargetInfo.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "MipsSubtarget.h"
  15 #include "Mips.h"
  16 #include "llvm/Target/TargetRegistry.h"
  17
  18 #define GET_SUBTARGETINFO_ENUM
  19 #define GET_SUBTARGETINFO_MC_DESC
  20 #define GET_SUBTARGETINFO_TARGET_DESC
  21 #define GET_SUBTARGETINFO_CTOR
  22 #include "MipsGenSubtargetInfo.inc"
  23
  24 using namespace llvm;
  25
  26 MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
  27                              const std::string &FS, bool little) :
  28   MipsGenSubtargetInfo(TT, CPU, FS),
  29   MipsArchVersion(Mips1), MipsABI(O32), IsLittle(little), IsSingleFloat(false),
  30   IsFP64bit(false), IsGP64bit(false), HasVFPU(false), IsLinux(true),
  31   HasSEInReg(false), HasCondMov(false), HasMulDivAdd(false), HasMinMax(false),
  32   HasSwap(false), HasBitCount(false)
  33 {
  34   std::string CPUName = CPU;
  35   if (CPUName.empty())
  36     CPUName = "mips1";
  37   MipsArchVersion = Mips1;
  38
  39   // Parse features string.
  40   ParseSubtargetFeatures(CPUName, FS);
  41
  42   // Initialize scheduling itinerary for the specified CPU.
  43   InstrItins = getInstrItineraryForCPU(CPUName);
  44
  45   // Is the target system Linux ?
  46   if (TT.find("linux") == std::string::npos)
  47     IsLinux = false;
  48
  49   // When only the target triple is specified and is
  50   // a allegrex target, set the features. We also match
  51   // big and little endian allegrex cores (dont really
  52   // know if a big one exists)
  53   if (TT.find("mipsallegrex") != std::string::npos ||
  54       TT.find("psp") != std::string::npos) {
  55     MipsABI = EABI;
  56     IsSingleFloat = true;
  57     MipsArchVersion = Mips2;
  58     HasVFPU = true; // Enables Allegrex Vector FPU (not supported yet)
  59     HasSEInReg = true;
  60     HasBitCount = true;
  61     HasSwap = true;
  62     HasCondMov = true;
  63   }
  64 }
  65
  66 MCSubtargetInfo *createMipsMCSubtargetInfo(StringRef TT, StringRef CPU,
  67                                            StringRef FS) {
  68   MCSubtargetInfo *X = new MCSubtargetInfo();
  69   InitMipsMCSubtargetInfo(X, CPU, FS);
  70   return X;
  71 }
  72
  73 extern "C" void LLVMInitializeMipsMCSubtargetInfo() {
  74   TargetRegistry::RegisterMCSubtargetInfo(TheMipsTarget,
  75                                           createMipsMCSubtargetInfo);
  76 }