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   uint64_t FeatureBits;                // Feature bits for current CPU
  38
  39 public:
  40   void InitMCSubtargetInfo(StringRef CPU, StringRef FS,
  41                            const SubtargetFeatureKV *PF,
  42                            const SubtargetFeatureKV *PD,
  43                            const SubtargetInfoKV *PI, const InstrStage *IS,
  44                            const unsigned *OC, const unsigned *FP,
  45                            unsigned NF, unsigned NP);
  46
  47   /// getFeatureBits - Get the feature bits.
  48   ///
  49   uint64_t getFeatureBits() const {
  50     return FeatureBits;
  51   }
  52
  53   /// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
  54   /// feature string), recompute and return feature bits.
  55   uint64_t ReInitMCSubtargetInfo(StringRef CPU, StringRef FS);
  56
  57   /// getInstrItineraryForCPU - Get scheduling itinerary of a CPU.
  58   ///
  59   InstrItineraryData getInstrItineraryForCPU(StringRef CPU) const;
  60 };
  61
  62 } // End llvm namespace
  63
  64 #endif