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//===-- HexagonAsmBackend.cpp - Hexagon Assembler Backend -----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "HexagonMCTargetDesc.h"
#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCELFObjectWriter.h"
using namespace llvm;
namespace {
class HexagonAsmBackend : public MCAsmBackend {
public:
HexagonAsmBackend(Target const & /*T*/) {}
unsigned getNumFixupKinds() const override { return 0; }
void applyFixup(MCFixup const & /*Fixup*/, char * /*Data*/,
unsigned /*DataSize*/, uint64_t /*Value*/,
bool /*IsPCRel*/) const override {
return;
}
bool mayNeedRelaxation(MCInst const & /*Inst*/) const override {
return false;
}
bool fixupNeedsRelaxation(MCFixup const & /*Fixup*/, uint64_t /*Value*/,
MCRelaxableFragment const * /*DF*/,
MCAsmLayout const & /*Layout*/) const override {
llvm_unreachable("fixupNeedsRelaxation() unimplemented");
}
void relaxInstruction(MCInst const & /*Inst*/,
MCInst & /*Res*/) const override {
llvm_unreachable("relaxInstruction() unimplemented");
}
bool writeNopData(uint64_t /*Count*/,
MCObjectWriter * /*OW*/) const override {
return true;
}
};
} // end anonymous namespace
namespace {
class ELFHexagonAsmBackend : public HexagonAsmBackend {
uint8_t OSABI;
public:
ELFHexagonAsmBackend(Target const &T, uint8_t OSABI)
: HexagonAsmBackend(T), OSABI(OSABI) {}
MCObjectWriter *createObjectWriter(raw_pwrite_stream &OS) const override {
StringRef CPU("HexagonV4");
return createHexagonELFObjectWriter(OS, OSABI, CPU);
}
};
} // end anonymous namespace
namespace llvm {
MCAsmBackend *createHexagonAsmBackend(Target const &T,
MCRegisterInfo const & /*MRI*/,
StringRef TT, StringRef /*CPU*/) {
uint8_t OSABI = MCELFObjectTargetWriter::getOSABI(Triple(TT).getOS());
return new ELFHexagonAsmBackend(T, OSABI);
}
}
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