1 //===- NVPTXSubtarget.cpp - NVPTX 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 NVPTX specific subclass of TargetSubtarget. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "NVPTXSubtarget.h" 15 #include "NVPTXTargetMachine.h" 16 17 using namespace llvm; 18 19 #define DEBUG_TYPE "nvptx-subtarget" 20 21 #define GET_SUBTARGETINFO_ENUM 22 #define GET_SUBTARGETINFO_TARGET_DESC 23 #define GET_SUBTARGETINFO_CTOR 24 #include "NVPTXGenSubtargetInfo.inc" 25 26 // Pin the vtable to this file. 27 void NVPTXSubtarget::anchor() {} 28 29 NVPTXSubtarget &NVPTXSubtarget::initializeSubtargetDependencies(StringRef CPU, 30 StringRef FS) { 31 // Provide the default CPU if we don't have one. 32 if (CPU.empty() && FS.size()) 33 llvm_unreachable("we are not using FeatureStr"); 34 TargetName = CPU.empty() ? "sm_20" : CPU; 35 36 ParseSubtargetFeatures(TargetName, FS); 37 38 // Set default to PTX 3.2 (CUDA 5.5) 39 if (PTXVersion == 0) { 40 PTXVersion = 32; 41 } 42 43 return *this; 44 } 45 46 NVPTXSubtarget::NVPTXSubtarget(const Triple &TT, const std::string &CPU, 47 const std::string &FS, 48 const NVPTXTargetMachine &TM) 49 : NVPTXGenSubtargetInfo(TT, CPU, FS), PTXVersion(0), SmVersion(20), TM(TM), 50 InstrInfo(), TLInfo(TM, initializeSubtargetDependencies(CPU, FS)), 51 FrameLowering() {} 52 53 bool NVPTXSubtarget::hasImageHandles() const { 54 // Enable handles for Kepler+, where CUDA supports indirect surfaces and 55 // textures 56 if (TM.getDrvInterface() == NVPTX::CUDA) 57 return (SmVersion >= 30); 58 59 // Disabled, otherwise 60 return false; 61 } 62
