[ARM] Add knowledge of FPU subtarget features to TargetParser

[oota-llvm.git] / lib / MC / MCSubtargetInfo.cpp

diff --git a/lib/MC/MCSubtargetInfo.cpp b/lib/MC/MCSubtargetInfo.cpp
index 3bb20b07f31d1a13bcdb7a2c6cc701026637d190..7954a02d83b2168d4974c4cb8368f694638dab20 100644 (file)
--- a/lib/MC/MCSubtargetInfo.cpp
+++ b/lib/MC/MCSubtargetInfo.cpp
@@ -8,69 +8,119 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Triple.h"
 #include "llvm/MC/MCInstrItineraries.h"
 #include "llvm/MC/SubtargetFeature.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/raw_ostream.h"
 #include <algorithm>
 
 using namespace llvm;
 
-void MCSubtargetInfo::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) {
+/// InitMCProcessorInfo - Set or change the CPU (optionally supplemented
+/// with feature string). Recompute feature bits and scheduling model.
+void
+MCSubtargetInfo::InitMCProcessorInfo(StringRef CPU, StringRef FS) {
+  SubtargetFeatures Features(FS);
+  FeatureBits = Features.getFeatureBits(CPU, ProcDesc, ProcFeatures);
+  InitCPUSchedModel(CPU);
+}
+
+void
+MCSubtargetInfo::InitCPUSchedModel(StringRef CPU) {
+  if (!CPU.empty())
+    CPUSchedModel = getSchedModelForCPU(CPU);
+  else
+    CPUSchedModel = MCSchedModel::GetDefaultSchedModel();
+}
+
+void
+MCSubtargetInfo::InitMCSubtargetInfo(StringRef TT, StringRef C, StringRef FS,
+                                     ArrayRef<SubtargetFeatureKV> PF,
+                                     ArrayRef<SubtargetFeatureKV> PD,
+                                     const SubtargetInfoKV *ProcSched,
+                                     const MCWriteProcResEntry *WPR,
+                                     const MCWriteLatencyEntry *WL,
+                                     const MCReadAdvanceEntry *RA,
+                                     const InstrStage *IS,
+                                     const unsigned *OC,
+                                     const unsigned *FP) {
+  TargetTriple = TT;
+  CPU = C;
   ProcFeatures = PF;
   ProcDesc = PD;
-  ProcItins = PI;
+  ProcSchedModels = ProcSched;
+  WriteProcResTable = WPR;
+  WriteLatencyTable = WL;
+  ReadAdvanceTable = RA;
+
   Stages = IS;
   OperandCycles = OC;
-  ForwardingPathes = FP;
-  NumFeatures = NF;
-  NumProcs = NP;
+  ForwardingPaths = FP;
 
-  SubtargetFeatures Features(FS);
-  FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
-                                        ProcFeatures, NumFeatures);
+  InitMCProcessorInfo(CPU, FS);
 }
 
+/// ToggleFeature - Toggle a feature and returns the re-computed feature
+/// bits. This version does not change the implied bits.
+FeatureBitset MCSubtargetInfo::ToggleFeature(uint64_t FB) {
+  FeatureBits.flip(FB);
+  return FeatureBits;
+}
 
-/// ReInitMCSubtargetInfo - Change CPU (and optionally supplemented with
-/// feature string) and recompute feature bits.
-uint64_t MCSubtargetInfo::ReInitMCSubtargetInfo(StringRef CPU, StringRef FS) {
-  SubtargetFeatures Features(FS);
-  FeatureBits = Features.getFeatureBits(CPU, ProcDesc, NumProcs,
-                                        ProcFeatures, NumFeatures);
+FeatureBitset MCSubtargetInfo::ToggleFeature(const FeatureBitset &FB) {
+  FeatureBits ^= FB;
   return FeatureBits;
 }
 
-InstrItineraryData
-MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
-  assert(ProcItins && "Instruction itineraries information not available!");
+/// ToggleFeature - Toggle a feature and returns the re-computed feature
+/// bits. This version will also change all implied bits.
+FeatureBitset MCSubtargetInfo::ToggleFeature(StringRef FS) {
+  SubtargetFeatures Features;
+  FeatureBits = Features.ToggleFeature(FeatureBits, FS, ProcFeatures);
+  return FeatureBits;
+}
+
+FeatureBitset MCSubtargetInfo::ApplyFeatureFlag(StringRef FS) {
+  SubtargetFeatures Features;
+  FeatureBits = Features.ApplyFeatureFlag(FeatureBits, FS, ProcFeatures);
+  return FeatureBits;
+}
 
+MCSchedModel
+MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {
+  assert(ProcSchedModels && "Processor machine model not available!");
+
+  unsigned NumProcs = ProcDesc.size();
 #ifndef NDEBUG
   for (size_t i = 1; i < NumProcs; i++) {
-    assert(strcmp(ProcItins[i - 1].Key, ProcItins[i].Key) < 0 &&
-           "Itineraries table is not sorted");
+    assert(strcmp(ProcSchedModels[i - 1].Key, ProcSchedModels[i].Key) < 0 &&
+           "Processor machine model table is not sorted");
   }
 #endif
 
   // Find entry
-  SubtargetInfoKV KV;
-  KV.Key = CPU.data();
   const SubtargetInfoKV *Found =
-    std::lower_bound(ProcItins, ProcItins+NumProcs, KV);
-  if (Found == ProcItins+NumProcs || StringRef(Found->Key) != CPU) {
-    errs() << "'" << CPU
-           << "' is not a recognized processor for this target"
-           << " (ignoring processor)\n";
-    return InstrItineraryData();
+    std::lower_bound(ProcSchedModels, ProcSchedModels+NumProcs, CPU);
+  if (Found == ProcSchedModels+NumProcs || StringRef(Found->Key) != CPU) {
+    if (CPU != "help") // Don't error if the user asked for help.
+      errs() << "'" << CPU
+             << "' is not a recognized processor for this target"
+             << " (ignoring processor)\n";
+    return MCSchedModel::GetDefaultSchedModel();
   }
+  assert(Found->Value && "Missing processor SchedModel value");
+  return *(const MCSchedModel *)Found->Value;
+}
+
+InstrItineraryData
+MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
+  const MCSchedModel SchedModel = getSchedModelForCPU(CPU);
+  return InstrItineraryData(SchedModel, Stages, OperandCycles, ForwardingPaths);
+}
 
-  return InstrItineraryData(Stages, OperandCycles, ForwardingPathes,
-                            (InstrItinerary *)Found->Value);
+/// Initialize an InstrItineraryData instance.
+void MCSubtargetInfo::initInstrItins(InstrItineraryData &InstrItins) const {
+  InstrItins =
+    InstrItineraryData(CPUSchedModel, Stages, OperandCycles, ForwardingPaths);
 }