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//==-- llvm/MC/MCSubtargetInfo.h - Subtarget Information ---------*- C++ -*-==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes the subtarget options of a Target machine.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_MC_MCSUBTARGET_H
#define LLVM_MC_MCSUBTARGET_H
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/MC/MCInstrItineraries.h"
namespace llvm {
class StringRef;
//===----------------------------------------------------------------------===//
///
/// MCSubtargetInfo - Generic base class for all target subtargets.
///
class MCSubtargetInfo {
const SubtargetFeatureKV *ProcFeatures; // Processor feature list
const SubtargetFeatureKV *ProcDesc; // Processor descriptions
const SubtargetInfoKV *ProcItins; // Scheduling itineraries
const InstrStage *Stages; // Instruction stages
const unsigned *OperandCycles; // Operand cycles
const unsigned *ForwardingPathes; // Forwarding pathes
unsigned NumFeatures; // Number of processor features
unsigned NumProcs; // Number of processors
uint64_t FeatureBits; // Feature bits for current CPU + FS
public:
void InitMCSubtargetInfo(StringRef CPU, StringRef FS,
const SubtargetFeatureKV *PF,
const SubtargetFeatureKV *PD,
const SubtargetInfoKV *PI, const InstrStage *IS,
const unsigned *OC, const unsigned *FP,
unsigned NF, unsigned NP);
/// getFeatureBits - Get the feature bits.
///
uint64_t getFeatureBits() const {
return FeatureBits;
}
/// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
/// feature string), recompute and return feature bits.
uint64_t ReInitMCSubtargetInfo(StringRef CPU, StringRef FS);
/// ToggleFeature - Toggle a feature and returns the re-computed feature
/// bits. This version does not change the implied bits.
uint64_t ToggleFeature(uint64_t FB);
/// ToggleFeature - Toggle a feature and returns the re-computed feature
/// bits. This version will also change all implied bits.
uint64_t ToggleFeature(StringRef FS);
/// getInstrItineraryForCPU - Get scheduling itinerary of a CPU.
///
InstrItineraryData getInstrItineraryForCPU(StringRef CPU) const;
};
} // End llvm namespace
#endif
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