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 | |
16 | namespace llvm { |
17 | |
18 | class PPCMCExpr : public MCTargetExpr { |
19 | public: |
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 | |
33 | private: |
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 | |
42 | public: |
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(Kind: VK_PPC_LO, Expr, Ctx); |
51 | } |
52 | |
53 | static const PPCMCExpr *createHi(const MCExpr *Expr, MCContext &Ctx) { |
54 | return create(Kind: VK_PPC_HI, Expr, Ctx); |
55 | } |
56 | |
57 | static const PPCMCExpr *createHa(const MCExpr *Expr, MCContext &Ctx) { |
58 | return create(Kind: 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 | |