1 //===-- MipsAsmBackend.h - Mips Asm Backend ------------------------------===// 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 MipsAsmBackend class. 10 // 11 //===----------------------------------------------------------------------===// 12 // 13 14 #ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H 15 #define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H 16 17 #include "MCTargetDesc/MipsFixupKinds.h" 18 #include "llvm/MC/MCAsmBackend.h" 19 #include "llvm/TargetParser/Triple.h" 20 21 namespace llvm { 22 23 class MCAssembler; 24 struct MCFixupKindInfo; 25 class MCRegisterInfo; 26 class Target; 27 28 class MipsAsmBackend : public MCAsmBackend { 29 Triple TheTriple; 30 bool IsN32; 31 32 public: 33 MipsAsmBackend(const Target &T, const MCRegisterInfo &MRI, const Triple &TT, 34 StringRef CPU, bool N32) 35 : MCAsmBackend(TT.isLittleEndian() ? llvm::endianness::little 36 : llvm::endianness::big), 37 TheTriple(TT), IsN32(N32) {} 38 39 std::unique_ptr<MCObjectTargetWriter> 40 createObjectTargetWriter() const override; 41 42 void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, 43 const MCValue &Target, MutableArrayRef<char> Data, 44 uint64_t Value, bool IsResolved, 45 const MCSubtargetInfo *STI) const override; 46 47 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override; 48 const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; 49 50 unsigned getNumFixupKinds() const override { 51 return Mips::NumTargetFixupKinds; 52 } 53 54 /// @name Target Relaxation Interfaces 55 /// @{ 56 57 /// fixupNeedsRelaxation - Target specific predicate for whether a given 58 /// fixup requires the associated instruction to be relaxed. 59 bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, 60 const MCRelaxableFragment *DF, 61 const MCAsmLayout &Layout) const override { 62 // FIXME. 63 llvm_unreachable("RelaxInstruction() unimplemented"); 64 return false; 65 } 66 67 bool writeNopData(raw_ostream &OS, uint64_t Count, 68 const MCSubtargetInfo *STI) const override; 69 70 bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, 71 const MCValue &Target, 72 const MCSubtargetInfo *STI) override; 73 74 bool isMicroMips(const MCSymbol *Sym) const override; 75 }; // class MipsAsmBackend 76 77 } // namespace 78 79 #endif 80