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99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
//===-- HexagonSubtarget.cpp - Hexagon 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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//
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// This file implements the Hexagon specific subclass of TargetSubtarget.
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//
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//===----------------------------------------------------------------------===//
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#include "HexagonSubtarget.h"
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#include "Hexagon.h"
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#include "HexagonRegisterInfo.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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#define DEBUG_TYPE "hexagon-subtarget"
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#define GET_SUBTARGETINFO_CTOR
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#define GET_SUBTARGETINFO_TARGET_DESC
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#include "HexagonGenSubtargetInfo.inc"
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static cl::opt<bool>
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EnableV3("enable-hexagon-v3", cl::Hidden,
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cl::desc("Enable Hexagon V3 instructions."));
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static cl::opt<bool>
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EnableMemOps(
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"enable-hexagon-memops",
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cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed, cl::init(true),
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cl::desc(
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"Generate V4 MEMOP in code generation for Hexagon target"));
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static cl::opt<bool>
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DisableMemOps(
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"disable-hexagon-memops",
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cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed, cl::init(false),
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cl::desc(
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"Do not generate V4 MEMOP in code generation for Hexagon target"));
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static cl::opt<bool>
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EnableIEEERndNear(
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"enable-hexagon-ieee-rnd-near",
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cl::Hidden, cl::ZeroOrMore, cl::init(false),
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cl::desc("Generate non-chopped conversion from fp to int."));
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HexagonSubtarget &
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HexagonSubtarget::initializeSubtargetDependencies(StringRef CPU, StringRef FS) {
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// If the programmer has not specified a Hexagon version, default to -mv4.
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if (CPUString.empty())
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CPUString = "hexagonv4";
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if (CPUString == "hexagonv2") {
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HexagonArchVersion = V2;
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} else if (CPUString == "hexagonv3") {
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EnableV3 = true;
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HexagonArchVersion = V3;
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} else if (CPUString == "hexagonv4") {
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HexagonArchVersion = V4;
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} else if (CPUString == "hexagonv5") {
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HexagonArchVersion = V5;
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} else {
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llvm_unreachable("Unrecognized Hexagon processor version");
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}
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ParseSubtargetFeatures(CPUString, FS);
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return *this;
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}
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HexagonSubtarget::HexagonSubtarget(StringRef TT, StringRef CPU, StringRef FS,
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const TargetMachine &TM)
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: HexagonGenSubtargetInfo(TT, CPU, FS), CPUString(CPU.str()),
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InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
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TSInfo(*TM.getDataLayout()), FrameLowering() {
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// Initialize scheduling itinerary for the specified CPU.
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InstrItins = getInstrItineraryForCPU(CPUString);
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// UseMemOps on by default unless disabled explicitly
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if (DisableMemOps)
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UseMemOps = false;
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else if (EnableMemOps)
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UseMemOps = true;
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else
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UseMemOps = false;
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if (EnableIEEERndNear)
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ModeIEEERndNear = true;
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else
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ModeIEEERndNear = false;
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}
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// Pin the vtable to this file.
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void HexagonSubtarget::anchor() {}
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