1//===-- HexagonSubtarget.cpp - Hexagon Subtarget Information --------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the Hexagon specific subclass of TargetSubtarget. 11// 12//===----------------------------------------------------------------------===// 13 14#include "HexagonSubtarget.h" 15#include "Hexagon.h" 16#include "HexagonRegisterInfo.h" 17#include "llvm/Support/CommandLine.h" 18#include "llvm/Support/ErrorHandling.h" 19using namespace llvm; 20 21#define GET_SUBTARGETINFO_CTOR 22#define GET_SUBTARGETINFO_TARGET_DESC 23#include "HexagonGenSubtargetInfo.inc" 24 25static cl::opt<bool> 26EnableV3("enable-hexagon-v3", cl::Hidden, 27 cl::desc("Enable Hexagon V3 instructions.")); 28 29static cl::opt<bool> 30EnableMemOps( 31 "enable-hexagon-memops", 32 cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed, 33 cl::desc("Generate V4 memop instructions.")); 34 35static cl::opt<bool> 36EnableIEEERndNear( 37 "enable-hexagon-ieee-rnd-near", 38 cl::Hidden, cl::ZeroOrMore, cl::init(false), 39 cl::desc("Generate non-chopped conversion from fp to int.")); 40 41HexagonSubtarget::HexagonSubtarget(StringRef TT, StringRef CPU, StringRef FS): 42 HexagonGenSubtargetInfo(TT, CPU, FS), 43 CPUString(CPU.str()) { 44 45 // If the programmer has not specified a Hexagon version, default to -mv4. 46 if (CPUString.empty()) 47 CPUString = "hexagonv4"; 48 49 if (CPUString == "hexagonv2") { 50 HexagonArchVersion = V2; 51 } else if (CPUString == "hexagonv3") { 52 EnableV3 = true; 53 HexagonArchVersion = V3; 54 } else if (CPUString == "hexagonv4") { 55 HexagonArchVersion = V4; 56 } else if (CPUString == "hexagonv5") { 57 HexagonArchVersion = V5; 58 } else { 59 llvm_unreachable("Unrecognized Hexagon processor version"); 60 } 61 62 ParseSubtargetFeatures(CPUString, FS); 63 64 // Initialize scheduling itinerary for the specified CPU. 65 InstrItins = getInstrItineraryForCPU(CPUString); 66 67 if (EnableMemOps) 68 UseMemOps = true; 69 else 70 UseMemOps = false; 71 72 if (EnableIEEERndNear) 73 ModeIEEERndNear = true; 74 else 75 ModeIEEERndNear = false; 76} 77 78