1 //===-- NVPTXMCExpr.cpp - NVPTX specific MC expression classes ------------===//
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 #define DEBUG_TYPE "nvptx-mcexpr"
11 #include "NVPTXMCExpr.h"
12 #include "llvm/ADT/StringExtras.h"
13 #include "llvm/MC/MCAssembler.h"
14 #include "llvm/MC/MCContext.h"
15 using namespace llvm;
16 
17 const NVPTXFloatMCExpr*
18 NVPTXFloatMCExpr::Create(VariantKind Kind, APFloat Flt, MCContext &Ctx) {
19   return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
20 }
21 
22 void NVPTXFloatMCExpr::PrintImpl(raw_ostream &OS) const {
23   bool Ignored;
24   unsigned NumHex;
25   APFloat APF = getAPFloat();
26 
27   switch (Kind) {
28   default: llvm_unreachable("Invalid kind!");
29   case VK_NVPTX_SINGLE_PREC_FLOAT:
30     OS << "0f";
31     NumHex = 8;
32     APF.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &Ignored);
33     break;
34   case VK_NVPTX_DOUBLE_PREC_FLOAT:
35     OS << "0d";
36     NumHex = 16;
37     APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &Ignored);
38     break;
39   }
40 
41   APInt API = APF.bitcastToAPInt();
42   std::string HexStr(utohexstr(API.getZExtValue()));
43   if (HexStr.length() < NumHex)
44     OS << std::string(NumHex - HexStr.length(), '0');
45   OS << utohexstr(API.getZExtValue());
46 }
47