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1346a63a0f
and MCSubtargetInfo. - Added methods to update subtarget features (used when targets automatically detect subtarget features or switch modes). - Teach X86Subtarget to update MCSubtargetInfo features bits since the MCSubtargetInfo layer can be shared with other modules. - These fixes .code 16 / .code 32 support since mode switch is updated in MCSubtargetInfo so MC code emitter can do the right thing. llvm-svn: 134884
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
//==-- llvm/MC/MCSubtargetInfo.h - Subtarget Information ---------*- C++ -*-==//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes the subtarget options of a Target machine.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCSUBTARGET_H
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#define LLVM_MC_MCSUBTARGET_H
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/MC/MCInstrItineraries.h"
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#include <string>
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namespace llvm {
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class StringRef;
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//===----------------------------------------------------------------------===//
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///
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/// MCSubtargetInfo - Generic base class for all target subtargets.
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///
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class MCSubtargetInfo {
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std::string TargetTriple; // Target triple
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const SubtargetFeatureKV *ProcFeatures; // Processor feature list
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const SubtargetFeatureKV *ProcDesc; // Processor descriptions
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const SubtargetInfoKV *ProcItins; // Scheduling itineraries
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const InstrStage *Stages; // Instruction stages
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const unsigned *OperandCycles; // Operand cycles
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const unsigned *ForwardingPathes; // Forwarding pathes
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unsigned NumFeatures; // Number of processor features
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unsigned NumProcs; // Number of processors
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uint64_t FeatureBits; // Feature bits for current CPU + FS
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public:
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void InitMCSubtargetInfo(StringRef TT, StringRef CPU, StringRef FS,
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const SubtargetFeatureKV *PF,
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const SubtargetFeatureKV *PD,
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const SubtargetInfoKV *PI, const InstrStage *IS,
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const unsigned *OC, const unsigned *FP,
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unsigned NF, unsigned NP);
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/// getTargetTriple - Return the target triple string.
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StringRef getTargetTriple() const {
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return TargetTriple;
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}
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/// getFeatureBits - Return the feature bits.
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///
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uint64_t getFeatureBits() const {
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return FeatureBits;
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}
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/// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
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/// feature string), recompute and return feature bits.
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uint64_t ReInitMCSubtargetInfo(StringRef CPU, StringRef FS);
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/// ToggleFeature - Toggle a feature and returns the re-computed feature
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/// bits. This version does not change the implied bits.
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uint64_t ToggleFeature(uint64_t FB);
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/// ToggleFeature - Toggle a feature and returns the re-computed feature
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/// bits. This version will also change all implied bits.
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uint64_t ToggleFeature(StringRef FS);
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/// getInstrItineraryForCPU - Get scheduling itinerary of a CPU.
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///
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InstrItineraryData getInstrItineraryForCPU(StringRef CPU) const;
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};
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} // End llvm namespace
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#endif
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