NVPTXMCExpr.cpp revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
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#include "NVPTXMCExpr.h"
11#include "llvm/ADT/StringExtras.h"
12#include "llvm/MC/MCAssembler.h"
13#include "llvm/MC/MCContext.h"
14using namespace llvm;
15
16#define DEBUG_TYPE "nvptx-mcexpr"
17
18const NVPTXFloatMCExpr*
19NVPTXFloatMCExpr::Create(VariantKind Kind, APFloat Flt, MCContext &Ctx) {
20  return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
21}
22
23void NVPTXFloatMCExpr::PrintImpl(raw_ostream &OS) const {
24  bool Ignored;
25  unsigned NumHex;
26  APFloat APF = getAPFloat();
27
28  switch (Kind) {
29  default: llvm_unreachable("Invalid kind!");
30  case VK_NVPTX_SINGLE_PREC_FLOAT:
31    OS << "0f";
32    NumHex = 8;
33    APF.convert(APFloat::IEEEsingle, APFloat::rmNearestTiesToEven, &Ignored);
34    break;
35  case VK_NVPTX_DOUBLE_PREC_FLOAT:
36    OS << "0d";
37    NumHex = 16;
38    APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &Ignored);
39    break;
40  }
41
42  APInt API = APF.bitcastToAPInt();
43  std::string HexStr(utohexstr(API.getZExtValue()));
44  if (HexStr.length() < NumHex)
45    OS << std::string(NumHex - HexStr.length(), '0');
46  OS << utohexstr(API.getZExtValue());
47}
48