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annotate lib/Target/NVPTX/NVPTXSubtarget.cpp @ 134:3a76565eade5 LLVM5.0.1

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update 5.0.1
author mir3636
date Sat, 17 Feb 2018 09:57:20 +0900
parents 803732b1fca8
children c2174574ed3a
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1 //===- NVPTXSubtarget.cpp - NVPTX Subtarget Information -------------------===//
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2 //
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3 // The LLVM Compiler Infrastructure
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4 //
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5 // This file is distributed under the University of Illinois Open Source
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6 // License. See LICENSE.TXT for details.
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7 //
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8 //===----------------------------------------------------------------------===//
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9 //
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10 // This file implements the NVPTX specific subclass of TargetSubtarget.
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11 //
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12 //===----------------------------------------------------------------------===//
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14 #include "NVPTXSubtarget.h"
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15 #include "NVPTXTargetMachine.h"
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17 using namespace llvm;
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19 #define DEBUG_TYPE "nvptx-subtarget"
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21 #define GET_SUBTARGETINFO_ENUM
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22 #define GET_SUBTARGETINFO_TARGET_DESC
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23 #define GET_SUBTARGETINFO_CTOR
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24 #include "NVPTXGenSubtargetInfo.inc"
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26 static cl::opt<bool>
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27 NoF16Math("nvptx-no-f16-math", cl::ZeroOrMore, cl::Hidden,
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28 cl::desc("NVPTX Specific: Disable generation of f16 math ops."),
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29 cl::init(false));
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31 // Pin the vtable to this file.
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32 void NVPTXSubtarget::anchor() {}
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34 NVPTXSubtarget &NVPTXSubtarget::initializeSubtargetDependencies(StringRef CPU,
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35 StringRef FS) {
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36 // Provide the default CPU if we don't have one.
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37 TargetName = CPU.empty() ? "sm_20" : CPU;
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39 ParseSubtargetFeatures(TargetName, FS);
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40
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41 // Set default to PTX 3.2 (CUDA 5.5)
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42 if (PTXVersion == 0) {
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43 PTXVersion = 32;
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44 }
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46 return *this;
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47 }
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49 NVPTXSubtarget::NVPTXSubtarget(const Triple &TT, const std::string &CPU,
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50 const std::string &FS,
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51 const NVPTXTargetMachine &TM)
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52 : NVPTXGenSubtargetInfo(TT, CPU, FS), PTXVersion(0), SmVersion(20), TM(TM),
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53 InstrInfo(), TLInfo(TM, initializeSubtargetDependencies(CPU, FS)),
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54 FrameLowering() {}
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56 bool NVPTXSubtarget::hasImageHandles() const {
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57 // Enable handles for Kepler+, where CUDA supports indirect surfaces and
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58 // textures
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59 if (TM.getDrvInterface() == NVPTX::CUDA)
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60 return (SmVersion >= 30);
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62 // Disabled, otherwise
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63 return false;
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64 }
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66 bool NVPTXSubtarget::allowFP16Math() const {
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67 return hasFP16Math() && NoF16Math == false;
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68 }