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"
14 #include "llvm/Support/Format.h"
15 using namespace llvm;
16 
17 #define DEBUG_TYPE "nvptx-mcexpr"
18 
19 const NVPTXFloatMCExpr *
20 NVPTXFloatMCExpr::create(VariantKind Kind, const APFloat &Flt, MCContext &Ctx) {
21   return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
22 }
23 
24 void NVPTXFloatMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const {
25   bool Ignored;
26   unsigned NumHex;
27   APFloat APF = getAPFloat();
28 
29   switch (Kind) {
30   default: llvm_unreachable("Invalid kind!");
31   case VK_NVPTX_HALF_PREC_FLOAT:
32     // ptxas does not have a way to specify half-precision floats.
33     // Instead we have to print and load fp16 constants as .b16
34     OS << "0x";
35     NumHex = 4;
36     APF.convert(APFloat::IEEEhalf(), APFloat::rmNearestTiesToEven, &Ignored);
37     break;
38   case VK_NVPTX_SINGLE_PREC_FLOAT:
39     OS << "0f";
40     NumHex = 8;
41     APF.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven, &Ignored);
42     break;
43   case VK_NVPTX_DOUBLE_PREC_FLOAT:
44     OS << "0d";
45     NumHex = 16;
46     APF.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven, &Ignored);
47     break;
48   }
49 
50   APInt API = APF.bitcastToAPInt();
51   OS << format_hex_no_prefix(API.getZExtValue(), NumHex, /*Upper=*/true);
52 }
53 
54 const NVPTXGenericMCSymbolRefExpr*
55 NVPTXGenericMCSymbolRefExpr::create(const MCSymbolRefExpr *SymExpr,
56                                     MCContext &Ctx) {
57   return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
58 }
59 
60 void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
61                                             const MCAsmInfo *MAI) const {
62   OS << "generic(";
63   SymExpr->print(OS, MAI);
64   OS << ")";
65 }
66