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https://github.com/c64scene-ar/llvm-6502.git
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6de6c6aae4
This removes static initializers from the backends which generate this data, and also makes this struct match the other Tablegen generated structs in behaviour Reviewed by Andy Trick and Chandler C git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216919 91177308-0d34-0410-b5e6-96231b3b80d8
115 lines
3.9 KiB
C++
115 lines
3.9 KiB
C++
//===-- MCSubtargetInfo.cpp - Subtarget Information -----------------------===//
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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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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/MCInstrItineraries.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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using namespace llvm;
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/// InitMCProcessorInfo - Set or change the CPU (optionally supplemented
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/// with feature string). Recompute feature bits and scheduling model.
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void
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MCSubtargetInfo::InitMCProcessorInfo(StringRef CPU, StringRef FS) {
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SubtargetFeatures Features(FS);
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FeatureBits = Features.getFeatureBits(CPU, ProcDesc, ProcFeatures);
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InitCPUSchedModel(CPU);
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}
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void
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MCSubtargetInfo::InitCPUSchedModel(StringRef CPU) {
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if (!CPU.empty())
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CPUSchedModel = getSchedModelForCPU(CPU);
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else
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CPUSchedModel = MCSchedModel::GetDefaultSchedModel();
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}
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void
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MCSubtargetInfo::InitMCSubtargetInfo(StringRef TT, StringRef CPU, StringRef FS,
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ArrayRef<SubtargetFeatureKV> PF,
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ArrayRef<SubtargetFeatureKV> PD,
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const SubtargetInfoKV *ProcSched,
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const MCWriteProcResEntry *WPR,
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const MCWriteLatencyEntry *WL,
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const MCReadAdvanceEntry *RA,
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const InstrStage *IS,
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const unsigned *OC,
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const unsigned *FP) {
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TargetTriple = TT;
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ProcFeatures = PF;
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ProcDesc = PD;
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ProcSchedModels = ProcSched;
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WriteProcResTable = WPR;
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WriteLatencyTable = WL;
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ReadAdvanceTable = RA;
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Stages = IS;
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OperandCycles = OC;
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ForwardingPaths = FP;
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InitMCProcessorInfo(CPU, FS);
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}
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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 MCSubtargetInfo::ToggleFeature(uint64_t FB) {
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FeatureBits ^= FB;
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return FeatureBits;
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}
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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 MCSubtargetInfo::ToggleFeature(StringRef FS) {
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SubtargetFeatures Features;
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FeatureBits = Features.ToggleFeature(FeatureBits, FS, ProcFeatures);
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return FeatureBits;
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}
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MCSchedModel
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MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {
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assert(ProcSchedModels && "Processor machine model not available!");
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unsigned NumProcs = ProcDesc.size();
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#ifndef NDEBUG
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for (size_t i = 1; i < NumProcs; i++) {
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assert(strcmp(ProcSchedModels[i - 1].Key, ProcSchedModels[i].Key) < 0 &&
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"Processor machine model table is not sorted");
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}
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#endif
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// Find entry
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const SubtargetInfoKV *Found =
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std::lower_bound(ProcSchedModels, ProcSchedModels+NumProcs, CPU);
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if (Found == ProcSchedModels+NumProcs || StringRef(Found->Key) != CPU) {
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errs() << "'" << CPU
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<< "' is not a recognized processor for this target"
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<< " (ignoring processor)\n";
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return MCSchedModel::GetDefaultSchedModel();
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}
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assert(Found->Value && "Missing processor SchedModel value");
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return *(const MCSchedModel *)Found->Value;
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}
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InstrItineraryData
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MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
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const MCSchedModel SchedModel = getSchedModelForCPU(CPU);
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return InstrItineraryData(SchedModel, Stages, OperandCycles, ForwardingPaths);
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}
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/// Initialize an InstrItineraryData instance.
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void MCSubtargetInfo::initInstrItins(InstrItineraryData &InstrItins) const {
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InstrItins =
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InstrItineraryData(CPUSchedModel, Stages, OperandCycles, ForwardingPaths);
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}
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