NVPTXMCExpr.h revision de2d8694e25a814696358e95141f4b1aa4d8847e 
1//===-- NVPTXMCExpr.h - NVPTX specific MC expression classes ----*- C++ -*-===//
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// Modeled after ARMMCExpr
11
12#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXMCEXPR_H
13#define LLVM_LIB_TARGET_NVPTX_NVPTXMCEXPR_H
14
15#include "llvm/ADT/APFloat.h"
16#include "llvm/MC/MCExpr.h"
17#include <utility>
18
19namespace llvm {
20
21class NVPTXFloatMCExpr : public MCTargetExpr {
22public:
23  enum VariantKind {
24    VK_NVPTX_None,
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 *createConstantFPSingle(const APFloat &Flt,
44                                                        MCContext &Ctx) {
45    return create(VK_NVPTX_SINGLE_PREC_FLOAT, Flt, Ctx);
46  }
47
48  static const NVPTXFloatMCExpr *createConstantFPDouble(const APFloat &Flt,
49                                                        MCContext &Ctx) {
50    return create(VK_NVPTX_DOUBLE_PREC_FLOAT, Flt, Ctx);
51  }
52
53  /// @}
54  /// @name Accessors
55  /// @{
56
57  /// getOpcode - Get the kind of this expression.
58  VariantKind getKind() const { return Kind; }
59
60  /// getSubExpr - Get the child of this expression.
61  APFloat getAPFloat() const { return Flt; }
62
63/// @}
64
65  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
66  bool evaluateAsRelocatableImpl(MCValue &Res,
67                                 const MCAsmLayout *Layout,
68                                 const MCFixup *Fixup) const override {
69    return false;
70  }
71  void visitUsedExpr(MCStreamer &Streamer) const override {};
72  MCFragment *findAssociatedFragment() const override { return nullptr; }
73
74  // There are no TLS NVPTXMCExprs at the moment.
75  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
76
77  static bool classof(const MCExpr *E) {
78    return E->getKind() == MCExpr::Target;
79  }
80};
81
82/// A wrapper for MCSymbolRefExpr that tells the assembly printer that the
83/// symbol should be enclosed by generic().
84class NVPTXGenericMCSymbolRefExpr : public MCTargetExpr {
85private:
86  const MCSymbolRefExpr *SymExpr;
87
88  explicit NVPTXGenericMCSymbolRefExpr(const MCSymbolRefExpr *_SymExpr)
89      : SymExpr(_SymExpr) {}
90
91public:
92  /// @name Construction
93  /// @{
94
95  static const NVPTXGenericMCSymbolRefExpr
96  *create(const MCSymbolRefExpr *SymExpr, MCContext &Ctx);
97
98  /// @}
99  /// @name Accessors
100  /// @{
101
102  /// getOpcode - Get the kind of this expression.
103  const MCSymbolRefExpr *getSymbolExpr() const { return SymExpr; }
104
105  /// @}
106
107  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
108  bool evaluateAsRelocatableImpl(MCValue &Res,
109                                 const MCAsmLayout *Layout,
110                                 const MCFixup *Fixup) const override {
111    return false;
112  }
113  void visitUsedExpr(MCStreamer &Streamer) const override {};
114  MCFragment *findAssociatedFragment() const override { return nullptr; }
115
116  // There are no TLS NVPTXMCExprs at the moment.
117  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
118
119  static bool classof(const MCExpr *E) {
120    return E->getKind() == MCExpr::Target;
121  }
122  };
123} // end namespace llvm
124
125#endif
126