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annotate lib/Target/NVPTX/NVPTXMCExpr.cpp @ 131:f476a9ba4795

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http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
author mir3636
date Fri, 16 Feb 2018 21:02:11 +0900
parents 803732b1fca8
children 3a76565eade5
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1 //===-- NVPTXMCExpr.cpp - NVPTX specific MC expression classes ------------===//
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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 #include "NVPTXMCExpr.h"
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11 #include "llvm/ADT/StringExtras.h"
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12 #include "llvm/MC/MCAssembler.h"
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13 #include "llvm/MC/MCContext.h"
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14 using namespace llvm;
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16 #define DEBUG_TYPE "nvptx-mcexpr"
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17
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18 const NVPTXFloatMCExpr *
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19 NVPTXFloatMCExpr::create(VariantKind Kind, const APFloat &Flt, MCContext &Ctx) {
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20 return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
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21 }
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23 void NVPTXFloatMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
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24 bool Ignored;
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25 unsigned NumHex;
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26 APFloat APF = getAPFloat();
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27
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28 switch (Kind) {
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29 default: llvm_unreachable("Invalid kind!");
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30 case VK_NVPTX_HALF_PREC_FLOAT:
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31 // ptxas does not have a way to specify half-precision floats.
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32 // Instead we have to print and load fp16 constants as .b16
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33 OS << "0x";
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34 NumHex = 4;
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35 APF.convert(APFloat::IEEEhalf(), APFloat::rmNearestTiesToEven, &Ignored);
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36 break;
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37 case VK_NVPTX_SINGLE_PREC_FLOAT:
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38 OS << "0f";
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39 NumHex = 8;
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40 APF.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven, &Ignored);
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41 break;
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42 case VK_NVPTX_DOUBLE_PREC_FLOAT:
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43 OS << "0d";
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44 NumHex = 16;
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45 APF.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven, &Ignored);
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46 break;
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47 }
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49 APInt API = APF.bitcastToAPInt();
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50 std::string HexStr(utohexstr(API.getZExtValue()));
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51 if (HexStr.length() < NumHex)
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52 OS << std::string(NumHex - HexStr.length(), '0');
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53 OS << utohexstr(API.getZExtValue());
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54 }
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55
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56 const NVPTXGenericMCSymbolRefExpr*
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57 NVPTXGenericMCSymbolRefExpr::create(const MCSymbolRefExpr *SymExpr,
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58 MCContext &Ctx) {
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59 return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
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60 }
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61
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62 void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
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63 const MCAsmInfo *MAI) const {
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64 OS << "generic(";
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65 SymExpr->print(OS, MAI);
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66 OS << ")";
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67 }