1 //===-- LoongArchAsmBackend.h - LoongArch Assembler Backend ---*- 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 // This file defines the LoongArchAsmBackend class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
14 #define LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
15 
16 #include "MCTargetDesc/LoongArchBaseInfo.h"
17 #include "MCTargetDesc/LoongArchFixupKinds.h"
18 #include "MCTargetDesc/LoongArchMCTargetDesc.h"
19 #include "llvm/MC/MCAsmBackend.h"
20 #include "llvm/MC/MCFixupKindInfo.h"
21 #include "llvm/MC/MCSubtargetInfo.h"
22 
23 namespace llvm {
24 
25 class LoongArchAsmBackend : public MCAsmBackend {
26   const MCSubtargetInfo &STI;
27   uint8_t OSABI;
28   bool Is64Bit;
29 
30 public:
31   LoongArchAsmBackend(const MCSubtargetInfo &STI, uint8_t OSABI, bool Is64Bit)
32       : MCAsmBackend(support::little), STI(STI), OSABI(OSABI),
33         Is64Bit(Is64Bit) {}
34   ~LoongArchAsmBackend() override {}
35 
36   void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
37                   const MCValue &Target, MutableArrayRef<char> Data,
38                   uint64_t Value, bool IsResolved,
39                   const MCSubtargetInfo *STI) const override;
40 
41   bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
42                              const MCValue &Target) override;
43 
44   bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
45                             const MCRelaxableFragment *DF,
46                             const MCAsmLayout &Layout) const override {
47     return false;
48   }
49 
50   unsigned getNumFixupKinds() const override {
51     return LoongArch::NumTargetFixupKinds;
52   }
53 
54   std::optional<MCFixupKind> getFixupKind(StringRef Name) const override;
55 
56   const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
57 
58   void relaxInstruction(MCInst &Inst,
59                         const MCSubtargetInfo &STI) const override {}
60 
61   bool writeNopData(raw_ostream &OS, uint64_t Count,
62                     const MCSubtargetInfo *STI) const override;
63 
64   std::unique_ptr<MCObjectTargetWriter>
65   createObjectTargetWriter() const override;
66 };
67 } // end namespace llvm
68 
69 #endif // LLVM_LIB_TARGET_LOONGARCH_MCTARGETDESC_LOONGARCHASMBACKEND_H
70