| //===-- HexagonSubtarget.cpp - Hexagon Subtarget Information --------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the Hexagon specific subclass of TargetSubtarget. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "HexagonSubtarget.h" |
| #include "Hexagon.h" |
| #include "HexagonRegisterInfo.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include <map> |
| |
| using namespace llvm; |
| |
| #define DEBUG_TYPE "hexagon-subtarget" |
| |
| #define GET_SUBTARGETINFO_CTOR |
| #define GET_SUBTARGETINFO_TARGET_DESC |
| #include "HexagonGenSubtargetInfo.inc" |
| |
| static cl::opt<bool> EnableMemOps("enable-hexagon-memops", |
| cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed, cl::init(true), |
| cl::desc("Generate V4 MEMOP in code generation for Hexagon target")); |
| |
| static cl::opt<bool> DisableMemOps("disable-hexagon-memops", |
| cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed, cl::init(false), |
| cl::desc("Do not generate V4 MEMOP in code generation for Hexagon target")); |
| |
| static cl::opt<bool> EnableIEEERndNear("enable-hexagon-ieee-rnd-near", |
| cl::Hidden, cl::ZeroOrMore, cl::init(false), |
| cl::desc("Generate non-chopped conversion from fp to int.")); |
| |
| static cl::opt<bool> EnableBSBSched("enable-bsb-sched", |
| cl::Hidden, cl::ZeroOrMore, cl::init(true)); |
| |
| static cl::opt<bool> EnableHexagonHVXDouble("enable-hexagon-hvx-double", |
| cl::Hidden, cl::ZeroOrMore, cl::init(false), |
| cl::desc("Enable Hexagon Double Vector eXtensions")); |
| |
| static cl::opt<bool> EnableHexagonHVX("enable-hexagon-hvx", |
| cl::Hidden, cl::ZeroOrMore, cl::init(false), |
| cl::desc("Enable Hexagon Vector eXtensions")); |
| |
| static cl::opt<bool> DisableHexagonMISched("disable-hexagon-misched", |
| cl::Hidden, cl::ZeroOrMore, cl::init(false), |
| cl::desc("Disable Hexagon MI Scheduling")); |
| |
| void HexagonSubtarget::initializeEnvironment() { |
| UseMemOps = false; |
| ModeIEEERndNear = false; |
| UseBSBScheduling = false; |
| } |
| |
| HexagonSubtarget & |
| HexagonSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) { |
| CPUString = HEXAGON_MC::selectHexagonCPU(getTargetTriple(), CPU); |
| |
| static std::map<StringRef, HexagonArchEnum> CpuTable { |
| { "hexagonv4", V4 }, |
| { "hexagonv5", V5 }, |
| { "hexagonv55", V55 }, |
| { "hexagonv60", V60 }, |
| }; |
| |
| auto foundIt = CpuTable.find(CPUString); |
| if (foundIt != CpuTable.end()) |
| HexagonArchVersion = foundIt->second; |
| else |
| llvm_unreachable("Unrecognized Hexagon processor version"); |
| |
| UseHVXOps = false; |
| UseHVXDblOps = false; |
| ParseSubtargetFeatures(CPUString, FS); |
| |
| if (EnableHexagonHVX.getPosition()) |
| UseHVXOps = EnableHexagonHVX; |
| if (EnableHexagonHVXDouble.getPosition()) |
| UseHVXDblOps = EnableHexagonHVXDouble; |
| |
| return *this; |
| } |
| |
| HexagonSubtarget::HexagonSubtarget(const Triple &TT, StringRef CPU, |
| StringRef FS, const TargetMachine &TM) |
| : HexagonGenSubtargetInfo(TT, CPU, FS), CPUString(CPU), |
| InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this), |
| FrameLowering() { |
| |
| initializeEnvironment(); |
| |
| // Initialize scheduling itinerary for the specified CPU. |
| InstrItins = getInstrItineraryForCPU(CPUString); |
| |
| // UseMemOps on by default unless disabled explicitly |
| if (DisableMemOps) |
| UseMemOps = false; |
| else if (EnableMemOps) |
| UseMemOps = true; |
| else |
| UseMemOps = false; |
| |
| if (EnableIEEERndNear) |
| ModeIEEERndNear = true; |
| else |
| ModeIEEERndNear = false; |
| |
| UseBSBScheduling = hasV60TOps() && EnableBSBSched; |
| } |
| |
| // Pin the vtable to this file. |
| void HexagonSubtarget::anchor() {} |
| |
| bool HexagonSubtarget::enableMachineScheduler() const { |
| if (DisableHexagonMISched.getNumOccurrences()) |
| return !DisableHexagonMISched; |
| return true; |
| } |