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"
15using namespace llvm;
16
17const NVPTXFloatMCExpr*
18NVPTXFloatMCExpr::Create(VariantKind Kind, APFloat Flt, MCContext &Ctx) {
19  return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
20}
21
22void 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