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
37  int64_t evaluateAsInt64(int64_t Value) const;
38
39  explicit PPCMCExpr(VariantKind Kind, const MCExpr *Expr)
40      : Kind(Kind), Expr(Expr) {}
41
42public:
43  /// @name Construction
44  /// @{
45
46  static const PPCMCExpr *create(VariantKind Kind, const MCExpr *Expr,
47                                 MCContext &Ctx);
48
49  static const PPCMCExpr *createLo(const MCExpr *Expr, MCContext &Ctx) {
50    return create(VK_PPC_LO, Expr, Ctx);
51  }
52
53  static const PPCMCExpr *createHi(const MCExpr *Expr, MCContext &Ctx) {
54    return create(VK_PPC_HI, Expr, Ctx);
55  }
56
57  static const PPCMCExpr *createHa(const MCExpr *Expr, MCContext &Ctx) {
58    return create(VK_PPC_HA, Expr, Ctx);
59  }
60
61  /// @}
62  /// @name Accessors
63  /// @{
64
65  /// getOpcode - Get the kind of this expression.
66  VariantKind getKind() const { return Kind; }
67
68  /// getSubExpr - Get the child of this expression.
69  const MCExpr *getSubExpr() const { return Expr; }
70
71  /// @}
72
73  void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
74  bool evaluateAsRelocatableImpl(MCValue &Res,
75                                 const MCAsmLayout *Layout,
76                                 const MCFixup *Fixup) const override;
77  void visitUsedExpr(MCStreamer &Streamer) const override;
78  MCFragment *findAssociatedFragment() const override {
79    return getSubExpr()->findAssociatedFragment();
80  }
81
82  // There are no TLS PPCMCExprs at the moment.
83  void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override {}
84
85  bool evaluateAsConstant(int64_t &Res) const;
86
87  static bool classof(const MCExpr *E) {
88    return E->getKind() == MCExpr::Target;
89  }
90};
91} // end namespace llvm
92
93#endif
94