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