1//===-- PPCMCExpr.h - PPC 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#ifndef LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
10#define LLVM_LIB_TARGET_POWERPC_MCTARGETDESC_PPCMCEXPR_H
11
12#include "llvm/MC/MCAsmLayout.h"
13#include "llvm/MC/MCExpr.h"
14#include "llvm/MC/MCValue.h"
15
16namespace llvm {
17
18class PPCMCExpr : public MCTargetExpr {
19public:
20  enum VariantKind {
21    VK_PPC_None,
22    VK_PPC_LO,
23    VK_PPC_HI,
24    VK_PPC_HA,
25    VK_PPC_HIGH,
26    VK_PPC_HIGHA,
27    VK_PPC_HIGHER,
28    VK_PPC_HIGHERA,
29    VK_PPC_HIGHEST,
30    VK_PPC_HIGHESTA
31  };
32
33private:
34  const VariantKind Kind;
35  const MCExpr *Expr;
36  bool IsDarwin;
37
38  int64_t evaluateAsInt64(int64_t Value) const;
39
40  explicit PPCMCExpr(VariantKind Kind, const MCExpr *Expr, bool IsDarwin)
41      : Kind(Kind), Expr(Expr), IsDarwin(IsDarwin) {}
42
43public:
44  /// @name Construction
45  /// @{
46
47  static const PPCMCExpr *create(VariantKind Kind, const MCExpr *Expr,
48                                 bool IsDarwin, MCContext &Ctx);
49
50  static const PPCMCExpr *createLo(const MCExpr *Expr,
51                                   bool IsDarwin, MCContext &Ctx) {
52    return create(VK_PPC_LO, Expr, IsDarwin, Ctx);
53  }
54
55  static const PPCMCExpr *createHi(const MCExpr *Expr,
56                                   bool IsDarwin, MCContext &Ctx) {
57    return create(VK_PPC_HI, Expr, IsDarwin, Ctx);
58  }
59
60  static const PPCMCExpr *createHa(const MCExpr *Expr,
61                                   bool IsDarwin, MCContext &Ctx) {
62    return create(VK_PPC_HA, Expr, IsDarwin, Ctx);
63  }
64
65  /// @}
66  /// @name Accessors
67  /// @{
68
69  /// getOpcode - Get the kind of this expression.
70  VariantKind getKind() const { return Kind; }
71
72  /// getSubExpr - Get the child of this expression.
73  const MCExpr *getSubExpr() const { return Expr; }
74
75  /// isDarwinSyntax - True if expression is to be printed using Darwin syntax.
76  bool isDarwinSyntax() const { return IsDarwin; }
77
78
79  /// @}
80
81  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
82  bool evaluateAsRelocatableImpl(MCValue &Res,
83                                 const MCAsmLayout *Layout,
84                                 const MCFixup *Fixup) const override;
85  void visitUsedExpr(MCStreamer &Streamer) const override;
86  MCFragment *findAssociatedFragment() const override {
87    return getSubExpr()->findAssociatedFragment();
88  }
89
90  // There are no TLS PPCMCExprs at the moment.
91  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
92
93  bool evaluateAsConstant(int64_t &Res) const;
94
95  static bool classof(const MCExpr *E) {
96    return E->getKind() == MCExpr::Target;
97  }
98};
99} // end namespace llvm
100
101#endif
102