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 *
create(VariantKind Kind,const APFloat & Flt,MCContext & Ctx)20 NVPTXFloatMCExpr::create(VariantKind Kind, const APFloat &Flt, MCContext &Ctx) {
21 return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
22 }
23
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const24 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*
create(const MCSymbolRefExpr * SymExpr,MCContext & Ctx)55 NVPTXGenericMCSymbolRefExpr::create(const MCSymbolRefExpr *SymExpr,
56 MCContext &Ctx) {
57 return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
58 }
59
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const60 void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
61 const MCAsmInfo *MAI) const {
62 OS << "generic(";
63 SymExpr->print(OS, MAI);
64 OS << ")";
65 }
66