2014-03-27 20:38:40 +08:00
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//===-- MipsAsmBackend.h - Mips Asm Backend ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MipsAsmBackend class.
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//
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//===----------------------------------------------------------------------===//
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//
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2014-08-14 00:26:38 +08:00
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#ifndef LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
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#define LLVM_LIB_TARGET_MIPS_MCTARGETDESC_MIPSASMBACKEND_H
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2014-03-27 20:38:40 +08:00
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#include "MCTargetDesc/MipsFixupKinds.h"
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2015-09-16 00:17:27 +08:00
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#include "llvm/ADT/Triple.h"
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2015-01-14 19:23:27 +08:00
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#include "llvm/MC/MCAsmBackend.h"
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2014-03-27 20:38:40 +08:00
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namespace llvm {
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class MCAssembler;
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2014-03-27 22:10:00 +08:00
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struct MCFixupKindInfo;
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2014-03-27 20:38:40 +08:00
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class Target;
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class MCObjectWriter;
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class MipsAsmBackend : public MCAsmBackend {
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2015-09-16 00:17:27 +08:00
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Triple::OSType OSType;
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2014-03-27 20:38:40 +08:00
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bool IsLittle; // Big or little endian
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bool Is64Bit; // 32 or 64 bit words
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public:
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2015-09-16 00:17:27 +08:00
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MipsAsmBackend(const Target &T, Triple::OSType OSType, bool IsLittle,
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2015-03-17 02:06:57 +08:00
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bool Is64Bit)
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: MCAsmBackend(), OSType(OSType), IsLittle(IsLittle), Is64Bit(Is64Bit) {}
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2014-03-27 20:38:40 +08:00
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2015-04-15 06:14:34 +08:00
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MCObjectWriter *createObjectWriter(raw_pwrite_stream &OS) const override;
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2014-03-27 20:38:40 +08:00
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2017-06-24 06:52:36 +08:00
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void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup,
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const MCValue &Target, MutableArrayRef<char> Data,
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2017-06-24 08:26:57 +08:00
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uint64_t Value, bool IsPCRel) const override;
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2014-03-27 20:38:40 +08:00
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2016-01-20 07:05:27 +08:00
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Optional<MCFixupKind> getFixupKind(StringRef Name) const override;
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2014-04-29 15:58:02 +08:00
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const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
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2014-03-27 20:38:40 +08:00
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2014-04-29 15:58:02 +08:00
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unsigned getNumFixupKinds() const override {
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2014-03-27 20:38:40 +08:00
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return Mips::NumTargetFixupKinds;
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}
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/// @name Target Relaxation Interfaces
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/// @{
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/// MayNeedRelaxation - Check whether the given instruction may need
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/// relaxation.
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///
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/// \param Inst - The instruction to test.
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bool mayNeedRelaxation(const MCInst &Inst) const override {
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return false;
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}
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/// fixupNeedsRelaxation - Target specific predicate for whether a given
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/// fixup requires the associated instruction to be relaxed.
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bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
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const MCRelaxableFragment *DF,
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const MCAsmLayout &Layout) const override {
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// FIXME.
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2014-06-19 14:10:58 +08:00
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llvm_unreachable("RelaxInstruction() unimplemented");
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return false;
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}
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/// RelaxInstruction - Relax the instruction in the given fragment
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/// to the next wider instruction.
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///
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/// \param Inst - The instruction to relax, which may be the same
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/// as the output.
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/// \param [out] Res On return, the relaxed instruction.
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2016-07-11 22:23:53 +08:00
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void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
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MCInst &Res) const override {}
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/// @}
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2014-04-29 15:58:02 +08:00
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bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
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2014-03-27 20:38:40 +08:00
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}; // class MipsAsmBackend
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2015-06-23 17:49:53 +08:00
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} // namespace
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2014-03-27 20:38:40 +08:00
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#endif
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