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//===-- MipsAsmBackend.h - Mips Asm Backend ------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the MipsAsmBackend class.
//
//===----------------------------------------------------------------------===//
//
#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
#include "MCTargetDesc/MipsFixupKinds.h"
#include "llvm/ADT/Triple.h"
#include "llvm/MC/MCAsmBackend.h"
namespace llvm {
class MCAssembler;
struct MCFixupKindInfo;
class Target;
class MCObjectWriter;
class MipsAsmBackend : public MCAsmBackend {
Triple::OSType OSType;
bool IsLittle; // Big or little endian
bool Is64Bit; // 32 or 64 bit words
public:
MipsAsmBackend(const Target &T, Triple::OSType _OSType, bool _isLittle,
bool _is64Bit)
: MCAsmBackend(), OSType(_OSType), IsLittle(_isLittle),
Is64Bit(_is64Bit) {}
MCObjectWriter *createObjectWriter(raw_ostream &OS) const override;
void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
uint64_t Value, bool IsPCRel) const override;
const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
unsigned getNumFixupKinds() const override {
return Mips::NumTargetFixupKinds;
}
/// @name Target Relaxation Interfaces
/// @{
/// MayNeedRelaxation - Check whether the given instruction may need
/// relaxation.
///
/// \param Inst - The instruction to test.
bool mayNeedRelaxation(const MCInst &Inst) const override {
return false;
}
/// fixupNeedsRelaxation - Target specific predicate for whether a given
/// fixup requires the associated instruction to be relaxed.
bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
const MCRelaxableFragment *DF,
const MCAsmLayout &Layout) const override {
// FIXME.
llvm_unreachable("RelaxInstruction() unimplemented");
return false;
}
/// RelaxInstruction - Relax the instruction in the given fragment
/// to the next wider instruction.
///
/// \param Inst - The instruction to relax, which may be the same
/// as the output.
/// \param [out] Res On return, the relaxed instruction.
void relaxInstruction(const MCInst &Inst, MCInst &Res) const override {}
/// @}
bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
void processFixupValue(const MCAssembler &Asm, const MCAsmLayout &Layout,
const MCFixup &Fixup, const MCFragment *DF,
const MCValue &Target, uint64_t &Value,
bool &IsResolved) override;
}; // class MipsAsmBackend
} // namespace
#endif
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