}
}
+void SubtargetEmitter::FormItineraryBypassString(const std::string &Name,
+ Record *ItinData,
+ std::string &ItinString,
+ unsigned NOperandCycles) {
+ const std::vector<Record*> &BypassList =
+ ItinData->getValueAsListOfDefs("Bypasses");
+ unsigned N = BypassList.size();
+ unsigned i = 0;
+ for (; i < N;) {
+ ItinString += Name + "Bypass::" + BypassList[i]->getName();
+ if (++i < NOperandCycles) ItinString += ", ";
+ }
+ for (; i < NOperandCycles;) {
+ ItinString += " 0";
+ if (++i < NOperandCycles) ItinString += ", ";
+ }
+}
+
//
// EmitStageAndOperandCycleData - Generate unique itinerary stages and
// operand cycle tables. Record itineraries for processors.
<< " = 1 << " << j << ";\n";
OS << "}\n";
+
+ std::vector<Record*> BPs = Proc->getValueAsListOfDefs("BP");
+ if (BPs.size()) {
+ OS << "\n// Pipeline forwarding pathes for itineraries \"" << Name
+ << "\"\n" << "namespace " << Name << "Bypass {\n";
+
+ OS << " const unsigned NoBypass = 0;\n";
+ for (unsigned j = 0, BPN = BPs.size(); j < BPN; ++j)
+ OS << " const unsigned " << BPs[j]->getName()
+ << " = 1 << " << j << ";\n";
+
+ OS << "}\n";
+ }
}
// Begin stages table
// Begin operand cycle table
std::string OperandCycleTable = "static const unsigned OperandCycles[] = {\n";
OperandCycleTable += " 0, // No itinerary\n";
+
+ // Begin pipeline bypass table
+ std::string BypassTable = "static const unsigned ForwardingPathes[] = {\n";
+ BypassTable += " 0, // No itinerary\n";
unsigned StageCount = 1, OperandCycleCount = 1;
unsigned ItinStageEnum = 1, ItinOperandCycleEnum = 1;
- std::map<std::string, unsigned> ItinStageMap, ItinOperandCycleMap;
+ std::map<std::string, unsigned> ItinStageMap, ItinOperandMap;
for (unsigned i = 0, N = ProcItinList.size(); i < N; i++) {
// Next record
Record *Proc = ProcItinList[i];
FormItineraryOperandCycleString(ItinData, ItinOperandCycleString,
NOperandCycles);
+ std::string ItinBypassString;
+ FormItineraryBypassString(Name, ItinData, ItinBypassString,
+ NOperandCycles);
+
// Check to see if stage already exists and create if it doesn't
unsigned FindStage = 0;
if (NStages > 0) {
// Check to see if operand cycle already exists and create if it doesn't
unsigned FindOperandCycle = 0;
if (NOperandCycles > 0) {
- FindOperandCycle = ItinOperandCycleMap[ItinOperandCycleString];
+ std::string ItinOperandString = ItinOperandCycleString+ItinBypassString;
+ FindOperandCycle = ItinOperandMap[ItinOperandString];
if (FindOperandCycle == 0) {
// Emit as cycle, // index
OperandCycleTable += ItinOperandCycleString + ", // " +
itostr(ItinOperandCycleEnum) + "\n";
// Record Itin class number.
- ItinOperandCycleMap[ItinOperandCycleString] =
+ ItinOperandMap[ItinOperandCycleString] =
FindOperandCycle = OperandCycleCount;
+
+ // Emit as bypass, // index
+ BypassTable += ItinBypassString + ", // " +
+ itostr(ItinOperandCycleEnum) + "\n";
+
OperandCycleCount += NOperandCycles;
ItinOperandCycleEnum++;
}
// Add process itinerary to list
ProcList.push_back(ItinList);
}
-
+
// Closing stage
StageTable += " { 0, 0, 0, llvm::InstrStage::Required } // End itinerary\n";
StageTable += "};\n";
OperandCycleTable += " 0 // End itinerary\n";
OperandCycleTable += "};\n";
+ BypassTable += " 0 // End itinerary\n";
+ BypassTable += "};\n";
+
// Emit tables.
OS << StageTable;
OS << OperandCycleTable;
+ OS << BypassTable;
// Emit size of tables
OS<<"\nenum {\n";
OS << "\n"
<< " InstrItinerary *Itinerary = (InstrItinerary *)"
<< "Features.getInfo(ProcItinKV, ProcItinKVSize);\n"
- << " InstrItins = InstrItineraryData(Stages, OperandCycles, Itinerary);\n";
+ << " InstrItins = InstrItineraryData(Stages, OperandCycles, "
+ << "ForwardingPathes, Itinerary);\n";
}
OS << " return Features.getCPU();\n"
// SubtargetEmitter::run - Main subtarget enumeration emitter.
//
void SubtargetEmitter::run(raw_ostream &OS) {
- Target = CodeGenTarget().getName();
+ Target = CodeGenTarget(Records).getName();
EmitSourceFileHeader("Subtarget Enumeration Source Fragment", OS);