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CPU, and feature string. Parsing some asm directives can change subtarget state (e.g. .code 16) and it must be reflected in other modules (e.g. MCCodeEmitter). That is, the MCSubtargetInfo instance must be shared. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134795 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
2.6 KiB
C++
74 lines
2.6 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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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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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 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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/// getFeatureBits - Get 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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