xref: /aosp_15_r20/external/llvm/lib/MC/MCSubtargetInfo.cpp (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker //===-- MCSubtargetInfo.cpp - Subtarget Information -----------------------===//
2*9880d681SAndroid Build Coastguard Worker //
3*9880d681SAndroid Build Coastguard Worker //                     The LLVM Compiler Infrastructure
4*9880d681SAndroid Build Coastguard Worker //
5*9880d681SAndroid Build Coastguard Worker // This file is distributed under the University of Illinois Open Source
6*9880d681SAndroid Build Coastguard Worker // License. See LICENSE.TXT for details.
7*9880d681SAndroid Build Coastguard Worker //
8*9880d681SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===//
9*9880d681SAndroid Build Coastguard Worker 
10*9880d681SAndroid Build Coastguard Worker #include "llvm/MC/MCSubtargetInfo.h"
11*9880d681SAndroid Build Coastguard Worker #include "llvm/ADT/StringRef.h"
12*9880d681SAndroid Build Coastguard Worker #include "llvm/ADT/Triple.h"
13*9880d681SAndroid Build Coastguard Worker #include "llvm/MC/MCInstrItineraries.h"
14*9880d681SAndroid Build Coastguard Worker #include "llvm/MC/SubtargetFeature.h"
15*9880d681SAndroid Build Coastguard Worker #include "llvm/Support/raw_ostream.h"
16*9880d681SAndroid Build Coastguard Worker #include <algorithm>
17*9880d681SAndroid Build Coastguard Worker 
18*9880d681SAndroid Build Coastguard Worker using namespace llvm;
19*9880d681SAndroid Build Coastguard Worker 
getFeatures(StringRef CPU,StringRef FS,ArrayRef<SubtargetFeatureKV> ProcDesc,ArrayRef<SubtargetFeatureKV> ProcFeatures)20*9880d681SAndroid Build Coastguard Worker static FeatureBitset getFeatures(StringRef CPU, StringRef FS,
21*9880d681SAndroid Build Coastguard Worker                                  ArrayRef<SubtargetFeatureKV> ProcDesc,
22*9880d681SAndroid Build Coastguard Worker                                  ArrayRef<SubtargetFeatureKV> ProcFeatures) {
23*9880d681SAndroid Build Coastguard Worker   SubtargetFeatures Features(FS);
24*9880d681SAndroid Build Coastguard Worker   return Features.getFeatureBits(CPU, ProcDesc, ProcFeatures);
25*9880d681SAndroid Build Coastguard Worker }
26*9880d681SAndroid Build Coastguard Worker 
InitMCProcessorInfo(StringRef CPU,StringRef FS)27*9880d681SAndroid Build Coastguard Worker void MCSubtargetInfo::InitMCProcessorInfo(StringRef CPU, StringRef FS) {
28*9880d681SAndroid Build Coastguard Worker   FeatureBits = getFeatures(CPU, FS, ProcDesc, ProcFeatures);
29*9880d681SAndroid Build Coastguard Worker   if (!CPU.empty())
30*9880d681SAndroid Build Coastguard Worker     CPUSchedModel = &getSchedModelForCPU(CPU);
31*9880d681SAndroid Build Coastguard Worker   else
32*9880d681SAndroid Build Coastguard Worker     CPUSchedModel = &MCSchedModel::GetDefaultSchedModel();
33*9880d681SAndroid Build Coastguard Worker }
34*9880d681SAndroid Build Coastguard Worker 
setDefaultFeatures(StringRef CPU,StringRef FS)35*9880d681SAndroid Build Coastguard Worker void MCSubtargetInfo::setDefaultFeatures(StringRef CPU, StringRef FS) {
36*9880d681SAndroid Build Coastguard Worker   FeatureBits = getFeatures(CPU, FS, ProcDesc, ProcFeatures);
37*9880d681SAndroid Build Coastguard Worker }
38*9880d681SAndroid Build Coastguard Worker 
MCSubtargetInfo(const Triple & 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)39*9880d681SAndroid Build Coastguard Worker MCSubtargetInfo::MCSubtargetInfo(
40*9880d681SAndroid Build Coastguard Worker     const Triple &TT, StringRef C, StringRef FS,
41*9880d681SAndroid Build Coastguard Worker     ArrayRef<SubtargetFeatureKV> PF, ArrayRef<SubtargetFeatureKV> PD,
42*9880d681SAndroid Build Coastguard Worker     const SubtargetInfoKV *ProcSched, const MCWriteProcResEntry *WPR,
43*9880d681SAndroid Build Coastguard Worker     const MCWriteLatencyEntry *WL, const MCReadAdvanceEntry *RA,
44*9880d681SAndroid Build Coastguard Worker     const InstrStage *IS, const unsigned *OC, const unsigned *FP)
45*9880d681SAndroid Build Coastguard Worker     : TargetTriple(TT), CPU(C), ProcFeatures(PF), ProcDesc(PD),
46*9880d681SAndroid Build Coastguard Worker       ProcSchedModels(ProcSched), WriteProcResTable(WPR), WriteLatencyTable(WL),
47*9880d681SAndroid Build Coastguard Worker       ReadAdvanceTable(RA), Stages(IS), OperandCycles(OC), ForwardingPaths(FP) {
48*9880d681SAndroid Build Coastguard Worker   InitMCProcessorInfo(CPU, FS);
49*9880d681SAndroid Build Coastguard Worker }
50*9880d681SAndroid Build Coastguard Worker 
51*9880d681SAndroid Build Coastguard Worker /// ToggleFeature - Toggle a feature and returns the re-computed feature
52*9880d681SAndroid Build Coastguard Worker /// bits. This version does not change the implied bits.
ToggleFeature(uint64_t FB)53*9880d681SAndroid Build Coastguard Worker FeatureBitset MCSubtargetInfo::ToggleFeature(uint64_t FB) {
54*9880d681SAndroid Build Coastguard Worker   FeatureBits.flip(FB);
55*9880d681SAndroid Build Coastguard Worker   return FeatureBits;
56*9880d681SAndroid Build Coastguard Worker }
57*9880d681SAndroid Build Coastguard Worker 
ToggleFeature(const FeatureBitset & FB)58*9880d681SAndroid Build Coastguard Worker FeatureBitset MCSubtargetInfo::ToggleFeature(const FeatureBitset &FB) {
59*9880d681SAndroid Build Coastguard Worker   FeatureBits ^= FB;
60*9880d681SAndroid Build Coastguard Worker   return FeatureBits;
61*9880d681SAndroid Build Coastguard Worker }
62*9880d681SAndroid Build Coastguard Worker 
63*9880d681SAndroid Build Coastguard Worker /// ToggleFeature - Toggle a feature and returns the re-computed feature
64*9880d681SAndroid Build Coastguard Worker /// bits. This version will also change all implied bits.
ToggleFeature(StringRef FS)65*9880d681SAndroid Build Coastguard Worker FeatureBitset MCSubtargetInfo::ToggleFeature(StringRef FS) {
66*9880d681SAndroid Build Coastguard Worker   SubtargetFeatures::ToggleFeature(FeatureBits, FS, ProcFeatures);
67*9880d681SAndroid Build Coastguard Worker   return FeatureBits;
68*9880d681SAndroid Build Coastguard Worker }
69*9880d681SAndroid Build Coastguard Worker 
ApplyFeatureFlag(StringRef FS)70*9880d681SAndroid Build Coastguard Worker FeatureBitset MCSubtargetInfo::ApplyFeatureFlag(StringRef FS) {
71*9880d681SAndroid Build Coastguard Worker   SubtargetFeatures::ApplyFeatureFlag(FeatureBits, FS, ProcFeatures);
72*9880d681SAndroid Build Coastguard Worker   return FeatureBits;
73*9880d681SAndroid Build Coastguard Worker }
74*9880d681SAndroid Build Coastguard Worker 
getSchedModelForCPU(StringRef CPU) const75*9880d681SAndroid Build Coastguard Worker const MCSchedModel &MCSubtargetInfo::getSchedModelForCPU(StringRef CPU) const {
76*9880d681SAndroid Build Coastguard Worker   assert(ProcSchedModels && "Processor machine model not available!");
77*9880d681SAndroid Build Coastguard Worker 
78*9880d681SAndroid Build Coastguard Worker   ArrayRef<SubtargetInfoKV> SchedModels(ProcSchedModels, ProcDesc.size());
79*9880d681SAndroid Build Coastguard Worker 
80*9880d681SAndroid Build Coastguard Worker   assert(std::is_sorted(SchedModels.begin(), SchedModels.end(),
81*9880d681SAndroid Build Coastguard Worker                     [](const SubtargetInfoKV &LHS, const SubtargetInfoKV &RHS) {
82*9880d681SAndroid Build Coastguard Worker                       return strcmp(LHS.Key, RHS.Key) < 0;
83*9880d681SAndroid Build Coastguard Worker                     }) &&
84*9880d681SAndroid Build Coastguard Worker          "Processor machine model table is not sorted");
85*9880d681SAndroid Build Coastguard Worker 
86*9880d681SAndroid Build Coastguard Worker   // Find entry
87*9880d681SAndroid Build Coastguard Worker   auto Found =
88*9880d681SAndroid Build Coastguard Worker     std::lower_bound(SchedModels.begin(), SchedModels.end(), CPU);
89*9880d681SAndroid Build Coastguard Worker   if (Found == SchedModels.end() || StringRef(Found->Key) != CPU) {
90*9880d681SAndroid Build Coastguard Worker     if (CPU != "help") // Don't error if the user asked for help.
91*9880d681SAndroid Build Coastguard Worker       errs() << "'" << CPU
92*9880d681SAndroid Build Coastguard Worker              << "' is not a recognized processor for this target"
93*9880d681SAndroid Build Coastguard Worker              << " (ignoring processor)\n";
94*9880d681SAndroid Build Coastguard Worker     return MCSchedModel::GetDefaultSchedModel();
95*9880d681SAndroid Build Coastguard Worker   }
96*9880d681SAndroid Build Coastguard Worker   assert(Found->Value && "Missing processor SchedModel value");
97*9880d681SAndroid Build Coastguard Worker   return *(const MCSchedModel *)Found->Value;
98*9880d681SAndroid Build Coastguard Worker }
99*9880d681SAndroid Build Coastguard Worker 
100*9880d681SAndroid Build Coastguard Worker InstrItineraryData
getInstrItineraryForCPU(StringRef CPU) const101*9880d681SAndroid Build Coastguard Worker MCSubtargetInfo::getInstrItineraryForCPU(StringRef CPU) const {
102*9880d681SAndroid Build Coastguard Worker   const MCSchedModel SchedModel = getSchedModelForCPU(CPU);
103*9880d681SAndroid Build Coastguard Worker   return InstrItineraryData(SchedModel, Stages, OperandCycles, ForwardingPaths);
104*9880d681SAndroid Build Coastguard Worker }
105*9880d681SAndroid Build Coastguard Worker 
106*9880d681SAndroid Build Coastguard Worker /// Initialize an InstrItineraryData instance.
initInstrItins(InstrItineraryData & InstrItins) const107*9880d681SAndroid Build Coastguard Worker void MCSubtargetInfo::initInstrItins(InstrItineraryData &InstrItins) const {
108*9880d681SAndroid Build Coastguard Worker   InstrItins = InstrItineraryData(getSchedModel(), Stages, OperandCycles,
109*9880d681SAndroid Build Coastguard Worker                                   ForwardingPaths);
110*9880d681SAndroid Build Coastguard Worker }
111