81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
//===-- ARMAsmBackend.h - ARM Assembler Backend -----------------*- C++ -*-===//
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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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#ifndef LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H
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#define LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H
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#include "MCTargetDesc/ARMFixupKinds.h"
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#include "MCTargetDesc/ARMMCTargetDesc.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/TargetRegistry.h"
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namespace llvm {
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class ARMAsmBackend : public MCAsmBackend {
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const MCSubtargetInfo *STI;
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bool isThumbMode; // Currently emitting Thumb code.
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bool IsLittleEndian; // Big or little endian.
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public:
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ARMAsmBackend(const Target &T, const Triple &TT, bool IsLittle)
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: MCAsmBackend(), STI(ARM_MC::createARMMCSubtargetInfo(TT, "", "")),
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isThumbMode(TT.getArchName().startswith("thumb")),
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IsLittleEndian(IsLittle) {}
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~ARMAsmBackend() override { delete STI; }
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unsigned getNumFixupKinds() const override {
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return ARM::NumTargetFixupKinds;
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}
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bool hasNOP() const { return STI->getFeatureBits()[ARM::HasV6T2Ops]; }
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const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
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/// processFixupValue - Target hook to process the literal value of a fixup
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/// if necessary.
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void processFixupValue(const MCAssembler &Asm, const MCAsmLayout &Layout,
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const MCFixup &Fixup, const MCFragment *DF,
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const MCValue &Target, uint64_t &Value,
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bool &IsResolved) override;
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unsigned adjustFixupValue(const MCFixup &Fixup, uint64_t Value, bool IsPCRel,
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MCContext *Ctx, bool IsLittleEndian,
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bool IsResolved) const;
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void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
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uint64_t Value, bool IsPCRel) const override;
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unsigned getRelaxedOpcode(unsigned Op) const;
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bool mayNeedRelaxation(const MCInst &Inst) const override;
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const char *reasonForFixupRelaxation(const MCFixup &Fixup,
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uint64_t Value) const;
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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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void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI,
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MCInst &Res) const override;
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bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
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void handleAssemblerFlag(MCAssemblerFlag Flag) override;
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unsigned getPointerSize() const { return 4; }
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bool isThumb() const { return isThumbMode; }
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void setIsThumb(bool it) { isThumbMode = it; }
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bool isLittle() const { return IsLittleEndian; }
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};
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} // end namespace llvm
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#endif
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