1 //===-- NVPTXMCExpr.cpp - NVPTX specific MC expression classes ------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "NVPTXMCExpr.h"
10 #include "llvm/ADT/StringExtras.h"
11 #include "llvm/MC/MCAssembler.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/Support/Format.h"
14 using namespace llvm;
15
16 #define DEBUG_TYPE "nvptx-mcexpr"
17
18 const NVPTXFloatMCExpr *
create(VariantKind Kind,const APFloat & Flt,MCContext & Ctx)19 NVPTXFloatMCExpr::create(VariantKind Kind, const APFloat &Flt, MCContext &Ctx) {
20 return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
21 }
22
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const23 void NVPTXFloatMCExpr::printImpl(raw_ostream &OS, const MCAsmInfo *MAI) 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_HALF_PREC_FLOAT:
31 // ptxas does not have a way to specify half-precision floats.
32 // Instead we have to print and load fp16 constants as .b16
33 OS << "0x";
34 NumHex = 4;
35 APF.convert(APFloat::IEEEhalf(), APFloat::rmNearestTiesToEven, &Ignored);
36 break;
37 case VK_NVPTX_BFLOAT_PREC_FLOAT:
38 OS << "0x";
39 NumHex = 4;
40 APF.convert(APFloat::BFloat(), APFloat::rmNearestTiesToEven, &Ignored);
41 break;
42 case VK_NVPTX_SINGLE_PREC_FLOAT:
43 OS << "0f";
44 NumHex = 8;
45 APF.convert(APFloat::IEEEsingle(), APFloat::rmNearestTiesToEven, &Ignored);
46 break;
47 case VK_NVPTX_DOUBLE_PREC_FLOAT:
48 OS << "0d";
49 NumHex = 16;
50 APF.convert(APFloat::IEEEdouble(), APFloat::rmNearestTiesToEven, &Ignored);
51 break;
52 }
53
54 APInt API = APF.bitcastToAPInt();
55 OS << format_hex_no_prefix(API.getZExtValue(), NumHex, /*Upper=*/true);
56 }
57
58 const NVPTXGenericMCSymbolRefExpr*
create(const MCSymbolRefExpr * SymExpr,MCContext & Ctx)59 NVPTXGenericMCSymbolRefExpr::create(const MCSymbolRefExpr *SymExpr,
60 MCContext &Ctx) {
61 return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
62 }
63
printImpl(raw_ostream & OS,const MCAsmInfo * MAI) const64 void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
65 const MCAsmInfo *MAI) const {
66 OS << "generic(";
67 SymExpr->print(OS, MAI);
68 OS << ")";
69 }
70