diff options
Diffstat (limited to 'lib/Target/MBlaze/MBlazeAsmBackend.cpp')
-rw-r--r-- | lib/Target/MBlaze/MBlazeAsmBackend.cpp | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/lib/Target/MBlaze/MBlazeAsmBackend.cpp b/lib/Target/MBlaze/MBlazeAsmBackend.cpp deleted file mode 100644 index 08f14c3659..0000000000 --- a/lib/Target/MBlaze/MBlazeAsmBackend.cpp +++ /dev/null @@ -1,162 +0,0 @@ -//===-- MBlazeAsmBackend.cpp - MBlaze Assembler Backend -------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/Target/TargetAsmBackend.h" -#include "MBlaze.h" -#include "MBlazeELFWriterInfo.h" -#include "llvm/ADT/Twine.h" -#include "llvm/MC/MCAssembler.h" -#include "llvm/MC/MCAsmLayout.h" -#include "llvm/MC/MCELFObjectWriter.h" -#include "llvm/MC/MCELFSymbolFlags.h" -#include "llvm/MC/MCExpr.h" -#include "llvm/MC/MCObjectWriter.h" -#include "llvm/MC/MCSectionELF.h" -#include "llvm/MC/MCSectionMachO.h" -#include "llvm/MC/MCValue.h" -#include "llvm/Support/ELF.h" -#include "llvm/Support/ErrorHandling.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/Target/TargetRegistry.h" -#include "llvm/Target/TargetAsmBackend.h" -using namespace llvm; - -static unsigned getFixupKindSize(unsigned Kind) { - switch (Kind) { - default: assert(0 && "invalid fixup kind!"); - case FK_Data_1: return 1; - case FK_PCRel_2: - case FK_Data_2: return 2; - case FK_PCRel_4: - case FK_Data_4: return 4; - case FK_Data_8: return 8; - } -} - - -namespace { -class MBlazeELFObjectWriter : public MCELFObjectTargetWriter { -public: - MBlazeELFObjectWriter(Triple::OSType OSType) - : MCELFObjectTargetWriter(/*is64Bit*/ false, OSType, ELF::EM_MBLAZE, - /*HasRelocationAddend*/ true) {} -}; - -class MBlazeAsmBackend : public TargetAsmBackend { -public: - MBlazeAsmBackend(const Target &T) - : TargetAsmBackend() { - } - - unsigned getNumFixupKinds() const { - return 2; - } - - bool MayNeedRelaxation(const MCInst &Inst) const; - - void RelaxInstruction(const MCInst &Inst, MCInst &Res) const; - - bool WriteNopData(uint64_t Count, MCObjectWriter *OW) const; - - unsigned getPointerSize() const { - return 4; - } -}; - -static unsigned getRelaxedOpcode(unsigned Op) { - switch (Op) { - default: return Op; - case MBlaze::ADDIK: return MBlaze::ADDIK32; - case MBlaze::ORI: return MBlaze::ORI32; - case MBlaze::BRLID: return MBlaze::BRLID32; - } -} - -bool MBlazeAsmBackend::MayNeedRelaxation(const MCInst &Inst) const { - if (getRelaxedOpcode(Inst.getOpcode()) == Inst.getOpcode()) - return false; - - bool hasExprOrImm = false; - for (unsigned i = 0; i < Inst.getNumOperands(); ++i) - hasExprOrImm |= Inst.getOperand(i).isExpr(); - - return hasExprOrImm; -} - -void MBlazeAsmBackend::RelaxInstruction(const MCInst &Inst, MCInst &Res) const { - Res = Inst; - Res.setOpcode(getRelaxedOpcode(Inst.getOpcode())); -} - -bool MBlazeAsmBackend::WriteNopData(uint64_t Count, MCObjectWriter *OW) const { - if ((Count % 4) != 0) - return false; - - for (uint64_t i = 0; i < Count; i += 4) - OW->Write32(0x00000000); - - return true; -} -} // end anonymous namespace - -namespace { -class ELFMBlazeAsmBackend : public MBlazeAsmBackend { -public: - Triple::OSType OSType; - ELFMBlazeAsmBackend(const Target &T, Triple::OSType _OSType) - : MBlazeAsmBackend(T), OSType(_OSType) { } - - void ApplyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize, - uint64_t Value) const; - - MCObjectWriter *createObjectWriter(raw_ostream &OS) const { - return createELFObjectWriter(new MBlazeELFObjectWriter(OSType), OS, - /*IsLittleEndian*/ false); - } -}; - -void ELFMBlazeAsmBackend::ApplyFixup(const MCFixup &Fixup, char *Data, - unsigned DataSize, uint64_t Value) const { - unsigned Size = getFixupKindSize(Fixup.getKind()); - - assert(Fixup.getOffset() + Size <= DataSize && - "Invalid fixup offset!"); - - char *data = Data + Fixup.getOffset(); - switch (Size) { - default: llvm_unreachable("Cannot fixup unknown value."); - case 1: llvm_unreachable("Cannot fixup 1 byte value."); - case 8: llvm_unreachable("Cannot fixup 8 byte value."); - - case 4: - *(data+7) = uint8_t(Value); - *(data+6) = uint8_t(Value >> 8); - *(data+3) = uint8_t(Value >> 16); - *(data+2) = uint8_t(Value >> 24); - break; - - case 2: - *(data+3) = uint8_t(Value >> 0); - *(data+2) = uint8_t(Value >> 8); - } -} -} // end anonymous namespace - -TargetAsmBackend *llvm::createMBlazeAsmBackend(const Target &T, - const std::string &TT) { - Triple TheTriple(TT); - - if (TheTriple.isOSDarwin()) - assert(0 && "Mac not supported on MBlaze"); - - if (TheTriple.isOSWindows()) - assert(0 && "Windows not supported on MBlaze"); - - return new ELFMBlazeAsmBackend(T, TheTriple.getOS()); -} |