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ffc0e73046
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
94 lines
3.2 KiB
C++
94 lines
3.2 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/MC/MCInstrItineraries.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/ADT/StringRef.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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void MCSubtargetInfo::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,
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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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unsigned NF, unsigned NP) {
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ProcFeatures = PF;
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ProcDesc = PD;
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ProcItins = PI;
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Stages = IS;
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OperandCycles = OC;
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ForwardingPathes = FP;
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NumFeatures = NF;
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NumProcs = NP;
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SubtargetFeatures Features(FS);
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FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
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ProcFeatures, NumFeatures);
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}
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/// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
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/// feature string) and recompute feature bits.
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uint64_t MCSubtargetInfo::ReInitMCSubtargetInfo(StringRef CPU, StringRef FS) {
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SubtargetFeatures Features(FS);
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FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
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ProcFeatures, NumFeatures);
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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 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,
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ProcFeatures, NumFeatures);
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return FeatureBits;
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}
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InstrItineraryData
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MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
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assert(ProcItins && "Instruction itineraries information not available!");
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#ifndef NDEBUG
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for (size_t i = 1; i < NumProcs; i++) {
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assert(strcmp(ProcItins[i - 1].Key, ProcItins[i].Key) < 0 &&
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"Itineraries table is not sorted");
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}
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#endif
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// Find entry
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SubtargetInfoKV KV;
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KV.Key = CPU.data();
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const SubtargetInfoKV *Found =
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std::lower_bound(ProcItins, ProcItins+NumProcs, KV);
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if (Found == ProcItins+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 InstrItineraryData();
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}
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return InstrItineraryData(Stages, OperandCycles, ForwardingPathes,
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(InstrItinerary *)Found->Value);
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}
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