include/llvm/MC/MCSubtargetInfo.h

   1 //==-- llvm/MC/MCSubtargetInfo.h - 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 describes the subtarget options of a Target machine.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_MC_MCSUBTARGET_H
  15 #define LLVM_MC_MCSUBTARGET_H
  16
  17 #include "llvm/MC/SubtargetFeature.h"
  18 #include "llvm/MC/MCInstrItineraries.h"
  19
  20 namespace llvm {
  21
  22 class StringRef;
  23
  24 //===----------------------------------------------------------------------===//
  25 ///
  26 /// MCSubtargetInfo - Generic base class for all target subtargets.
  27 ///
  28 class MCSubtargetInfo {
  29   const SubtargetFeatureKV *ProcFeatures;  // Processor feature list
  30   const SubtargetFeatureKV *ProcDesc;  // Processor descriptions
  31   const SubtargetInfoKV *ProcItins;    // Scheduling itineraries
  32   const InstrStage *Stages;            // Instruction stages
  33   const unsigned *OperandCycles;       // Operand cycles
  34   const unsigned *ForwardingPathes;    // Forwarding pathes
  35   unsigned NumFeatures;                // Number of processor features
  36   unsigned NumProcs;                   // Number of processors
  37
  38 public:
  39   void InitMCSubtargetInfo(const SubtargetFeatureKV *PF,
  40                            const SubtargetFeatureKV *PD,
  41                            const SubtargetInfoKV *PI, const InstrStage *IS,
  42                            const unsigned *OC, const unsigned *FP,
  43                            unsigned NF, unsigned NP) {
  44     ProcFeatures = PF;
  45     ProcDesc = PD;
  46     ProcItins = PI;
  47     Stages = IS;
  48     OperandCycles = OC;
  49     ForwardingPathes = FP;
  50     NumFeatures = NF;
  51     NumProcs = NP;
  52   }
  53
  54   /// getInstrItineraryForCPU - Get scheduling itinerary of a CPU.
  55   ///
  56   InstrItineraryData getInstrItineraryForCPU(StringRef CPU) const;
  57
  58   /// getFeatureBits - Get the feature bits for a CPU (optionally supplemented
  59   /// with feature string).
  60   uint64_t getFeatureBits(StringRef CPU, StringRef FS) const;
  61 };
  62
  63 } // End llvm namespace
  64
  65 #endif