1 //===- MipsMCExpr.h - Mips 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_MIPS_MCTARGETDESC_MIPSMCEXPR_H
10 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_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 MipsMCExpr : public MCTargetExpr {
19 public:
20   enum MipsExprKind {
21     MEK_None,
22     MEK_CALL_HI16,
23     MEK_CALL_LO16,
24     MEK_DTPREL,
25     MEK_DTPREL_HI,
26     MEK_DTPREL_LO,
27     MEK_GOT,
28     MEK_GOTTPREL,
29     MEK_GOT_CALL,
30     MEK_GOT_DISP,
31     MEK_GOT_HI16,
32     MEK_GOT_LO16,
33     MEK_GOT_OFST,
34     MEK_GOT_PAGE,
35     MEK_GPREL,
36     MEK_HI,
37     MEK_HIGHER,
38     MEK_HIGHEST,
39     MEK_LO,
40     MEK_NEG,
41     MEK_PCREL_HI16,
42     MEK_PCREL_LO16,
43     MEK_TLSGD,
44     MEK_TLSLDM,
45     MEK_TPREL_HI,
46     MEK_TPREL_LO,
47     MEK_Special,
48   };
49 
50 private:
51   const MipsExprKind Kind;
52   const MCExpr *Expr;
53 
MipsMCExpr(MipsExprKind Kind,const MCExpr * Expr)54   explicit MipsMCExpr(MipsExprKind Kind, const MCExpr *Expr)
55       : Kind(Kind), Expr(Expr) {}
56 
57 public:
58   static const MipsMCExpr *create(MipsExprKind Kind, const MCExpr *Expr,
59                                   MCContext &Ctx);
60   static const MipsMCExpr *createGpOff(MipsExprKind Kind, const MCExpr *Expr,
61                                        MCContext &Ctx);
62 
63   /// Get the kind of this expression.
getKind()64   MipsExprKind getKind() const { return Kind; }
65 
66   /// Get the child of this expression.
getSubExpr()67   const MCExpr *getSubExpr() const { return Expr; }
68 
69   void printImpl(raw_ostream &OS, const MCAsmInfo *MAI) const override;
70   bool evaluateAsRelocatableImpl(MCValue &Res, const MCAsmLayout *Layout,
71                                  const MCFixup *Fixup) const override;
72   void visitUsedExpr(MCStreamer &Streamer) const override;
73 
findAssociatedFragment()74   MCFragment *findAssociatedFragment() const override {
75     return getSubExpr()->findAssociatedFragment();
76   }
77 
78   void fixELFSymbolsInTLSFixups(MCAssembler &Asm) const override;
79 
classof(const MCExpr * E)80   static bool classof(const MCExpr *E) {
81     return E->getKind() == MCExpr::Target;
82   }
83 
84   bool isGpOff(MipsExprKind &Kind) const;
isGpOff()85   bool isGpOff() const {
86     MipsExprKind Kind;
87     return isGpOff(Kind);
88   }
89 };
90 
91 } // end namespace llvm
92 
93 #endif // LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSMCEXPR_H
94