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//===-- 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 "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
#define GET_SUBTARGETINFO_CTOR
#define GET_SUBTARGETINFO_TARGET_DESC
#include "HexagonGenSubtargetInfo.inc"
static cl::opt<bool>
EnableV3("enable-hexagon-v3", cl::Hidden,
cl::desc("Enable Hexagon V3 instructions."));
static cl::opt<bool>
EnableMemOps(
"enable-hexagon-memops",
cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed,
cl::desc("Generate V4 MEMOP in code generation for Hexagon target"));
HexagonSubtarget::HexagonSubtarget(StringRef TT, StringRef CPU, StringRef FS):
HexagonGenSubtargetInfo(TT, CPU, FS),
HexagonArchVersion(V2),
CPUString(CPU.str()) {
ParseSubtargetFeatures(CPU, FS);
switch(HexagonArchVersion) {
case HexagonSubtarget::V2:
break;
case HexagonSubtarget::V3:
EnableV3 = true;
break;
case HexagonSubtarget::V4:
break;
default:
llvm_unreachable("Unknown Architecture Version.");
}
// Initialize scheduling itinerary for the specified CPU.
InstrItins = getInstrItineraryForCPU(CPUString);
// Max issue per cycle == bundle width.
InstrItins.IssueWidth = 4;
if (EnableMemOps)
UseMemOps = true;
else
UseMemOps = false;
}
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