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/MCAsmInfo.h"
12#include "llvm/MC/MCAssembler.h"
13#include "llvm/MC/MCContext.h"
14#include "llvm/Support/Format.h"
15using namespace llvm;
16
17#define DEBUG_TYPE "nvptx-mcexpr"
18
19const NVPTXFloatMCExpr *
20NVPTXFloatMCExpr::create(VariantKind Kind, const APFloat &Flt, MCContext &Ctx) {
21 return new (Ctx) NVPTXFloatMCExpr(Kind, Flt);
22}
23
24void 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(ToSemantics: APFloat::IEEEhalf(), RM: APFloat::rmNearestTiesToEven, losesInfo: &Ignored);
37 break;
38 case VK_NVPTX_BFLOAT_PREC_FLOAT:
39 OS << "0x";
40 NumHex = 4;
41 APF.convert(ToSemantics: APFloat::BFloat(), RM: APFloat::rmNearestTiesToEven, losesInfo: &Ignored);
42 break;
43 case VK_NVPTX_SINGLE_PREC_FLOAT:
44 OS << "0f";
45 NumHex = 8;
46 APF.convert(ToSemantics: APFloat::IEEEsingle(), RM: APFloat::rmNearestTiesToEven, losesInfo: &Ignored);
47 break;
48 case VK_NVPTX_DOUBLE_PREC_FLOAT:
49 OS << "0d";
50 NumHex = 16;
51 APF.convert(ToSemantics: APFloat::IEEEdouble(), RM: APFloat::rmNearestTiesToEven, losesInfo: &Ignored);
52 break;
53 }
54
55 APInt API = APF.bitcastToAPInt();
56 OS << format_hex_no_prefix(N: API.getZExtValue(), Width: NumHex, /*Upper=*/true);
57}
58
59const NVPTXGenericMCSymbolRefExpr*
60NVPTXGenericMCSymbolRefExpr::create(const MCSymbolRefExpr *SymExpr,
61 MCContext &Ctx) {
62 return new (Ctx) NVPTXGenericMCSymbolRefExpr(SymExpr);
63}
64
65void NVPTXGenericMCSymbolRefExpr::printImpl(raw_ostream &OS,
66 const MCAsmInfo *MAI) const {
67 OS << "generic(";
68 MAI->printExpr(OS, *SymExpr);
69 OS << ")";
70}
71