1//===-- NVPTXMCExpr.h - NVPTX specific MC expression classes ----*- C++ -*-===//
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// Modeled after ARMMCExpr
10
11#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXMCEXPR_H
12#define LLVM_LIB_TARGET_NVPTX_NVPTXMCEXPR_H
13
14#include "llvm/ADT/APFloat.h"
15#include "llvm/MC/MCExpr.h"
16#include <utility>
17
18namespace llvm {
19
20class NVPTXFloatMCExpr : public MCTargetExpr {
21public:
22  enum VariantKind {
23    VK_NVPTX_None,
24    VK_NVPTX_HALF_PREC_FLOAT,   // FP constant in half-precision
25    VK_NVPTX_SINGLE_PREC_FLOAT, // FP constant in single-precision
26    VK_NVPTX_DOUBLE_PREC_FLOAT  // FP constant in double-precision
27  };
28
29private:
30  const VariantKind Kind;
31  const APFloat Flt;
32
33  explicit NVPTXFloatMCExpr(VariantKind Kind, APFloat Flt)
34      : Kind(Kind), Flt(std::move(Flt)) {}
35
36public:
37  /// @name Construction
38  /// @{
39
40  static const NVPTXFloatMCExpr *create(VariantKind Kind, const APFloat &Flt,
41                                        MCContext &Ctx);
42
43  static const NVPTXFloatMCExpr *createConstantFPHalf(const APFloat &Flt,
44                                                        MCContext &Ctx) {
45    return create(VK_NVPTX_HALF_PREC_FLOAT, Flt, Ctx);
46  }
47
48  static const NVPTXFloatMCExpr *createConstantFPSingle(const APFloat &Flt,
49                                                        MCContext &Ctx) {
50    return create(VK_NVPTX_SINGLE_PREC_FLOAT, Flt, Ctx);
51  }
52
53  static const NVPTXFloatMCExpr *createConstantFPDouble(const APFloat &Flt,
54                                                        MCContext &Ctx) {
55    return create(VK_NVPTX_DOUBLE_PREC_FLOAT, Flt, Ctx);
56  }
57
58  /// @}
59  /// @name Accessors
60  /// @{
61
62  /// getOpcode - Get the kind of this expression.
63  VariantKind getKind() const { return Kind; }
64
65  /// getSubExpr - Get the child of this expression.
66  APFloat getAPFloat() const { return Flt; }
67
68/// @}
69
70  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
71  bool evaluateAsRelocatableImpl(MCValue &Res,
72                                 const MCAsmLayout *Layout,
73                                 const MCFixup *Fixup) const override {
74    return false;
75  }
76  void visitUsedExpr(MCStreamer &Streamer) const override {};
77  MCFragment *findAssociatedFragment() const override { return nullptr; }
78
79  // There are no TLS NVPTXMCExprs at the moment.
80  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
81
82  static bool classof(const MCExpr *E) {
83    return E->getKind() == MCExpr::Target;
84  }
85};
86
87/// A wrapper for MCSymbolRefExpr that tells the assembly printer that the
88/// symbol should be enclosed by generic().
89class NVPTXGenericMCSymbolRefExpr : public MCTargetExpr {
90private:
91  const MCSymbolRefExpr *SymExpr;
92
93  explicit NVPTXGenericMCSymbolRefExpr(const MCSymbolRefExpr *_SymExpr)
94      : SymExpr(_SymExpr) {}
95
96public:
97  /// @name Construction
98  /// @{
99
100  static const NVPTXGenericMCSymbolRefExpr
101  *create(const MCSymbolRefExpr *SymExpr, MCContext &Ctx);
102
103  /// @}
104  /// @name Accessors
105  /// @{
106
107  /// getOpcode - Get the kind of this expression.
108  const MCSymbolRefExpr *getSymbolExpr() const { return SymExpr; }
109
110  /// @}
111
112  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
113  bool evaluateAsRelocatableImpl(MCValue &Res,
114                                 const MCAsmLayout *Layout,
115                                 const MCFixup *Fixup) const override {
116    return false;
117  }
118  void visitUsedExpr(MCStreamer &Streamer) const override {};
119  MCFragment *findAssociatedFragment() const override { return nullptr; }
120
121  // There are no TLS NVPTXMCExprs at the moment.
122  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
123
124  static bool classof(const MCExpr *E) {
125    return E->getKind() == MCExpr::Target;
126  }
127  };
128} // end namespace llvm
129
130#endif
131