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() ? support::little : support::big), 36 TheTriple(TT), IsN32(N32) {} 37 38 std::unique_ptr<MCObjectTargetWriter> 39 createObjectTargetWriter() const override; 40 41 void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, 42 const MCValue &Target, MutableArrayRef<char> Data, 43 uint64_t Value, bool IsResolved, 44 const MCSubtargetInfo *STI) const override; 45 46 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override; 47 const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; 48 49 unsigned getNumFixupKinds() const override { 50 return Mips::NumTargetFixupKinds; 51 } 52 53 /// @name Target Relaxation Interfaces 54 /// @{ 55 56 /// fixupNeedsRelaxation - Target specific predicate for whether a given 57 /// fixup requires the associated instruction to be relaxed. 58 bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, 59 const MCRelaxableFragment *DF, 60 const MCAsmLayout &Layout) const override { 61 // FIXME. 62 llvm_unreachable("RelaxInstruction() unimplemented"); 63 return false; 64 } 65 66 bool writeNopData(raw_ostream &OS, uint64_t Count, 67 const MCSubtargetInfo *STI) const override; 68 69 bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, 70 const MCValue &Target) override; 71 72 bool isMicroMips(const MCSymbol *Sym) const override; 73 }; // class MipsAsmBackend 74 75 } // namespace 76 77 #endif 78