1 //===-- AMDGPUAsmBackend.cpp - AMDGPU Assembler Backend -------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "MCTargetDesc/AMDGPUMCTargetDesc.h" 11 #include "llvm/ADT/StringRef.h" 12 #include "llvm/MC/MCAsmBackend.h" 13 #include "llvm/MC/MCAssembler.h" 14 #include "llvm/MC/MCObjectWriter.h" 15 #include "llvm/MC/MCValue.h" 16 #include "llvm/Support/TargetRegistry.h" 17 18 using namespace llvm; 19 20 namespace { 21 22 class AMDGPUMCObjectWriter : public MCObjectWriter { 23 public: 24 AMDGPUMCObjectWriter(raw_ostream &OS) : MCObjectWriter(OS, true) { } 25 virtual void ExecutePostLayoutBinding(MCAssembler &Asm, 26 const MCAsmLayout &Layout) { 27 //XXX: Implement if necessary. 28 } 29 virtual void RecordRelocation(const MCAssembler &Asm, 30 const MCAsmLayout &Layout, 31 const MCFragment *Fragment, 32 const MCFixup &Fixup, 33 MCValue Target, uint64_t &FixedValue) { 34 assert(!"Not implemented"); 35 } 36 37 virtual void WriteObject(MCAssembler &Asm, const MCAsmLayout &Layout); 38 39 }; 40 41 class AMDGPUAsmBackend : public MCAsmBackend { 42 public: 43 AMDGPUAsmBackend(const Target &T) 44 : MCAsmBackend() {} 45 46 virtual AMDGPUMCObjectWriter *createObjectWriter(raw_ostream &OS) const; 47 virtual unsigned getNumFixupKinds() const { return 0; }; 48 virtual void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize, 49 uint64_t Value) const { assert(!"Not implemented"); } 50 virtual bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, 51 const MCInstFragment *DF, 52 const MCAsmLayout &Layout) const { 53 return false; 54 } 55 virtual void relaxInstruction(const MCInst &Inst, MCInst &Res) const { 56 assert(!"Not implemented"); 57 } 58 virtual bool mayNeedRelaxation(const MCInst &Inst) const { return false; } 59 virtual bool writeNopData(uint64_t Count, MCObjectWriter *OW) const { 60 return true; 61 } 62 }; 63 64 } //End anonymous namespace 65 66 void AMDGPUMCObjectWriter::WriteObject(MCAssembler &Asm, 67 const MCAsmLayout &Layout) { 68 for (MCAssembler::iterator I = Asm.begin(), E = Asm.end(); I != E; ++I) { 69 Asm.writeSectionData(I, Layout); 70 } 71 } 72 73 MCAsmBackend *llvm::createAMDGPUAsmBackend(const Target &T, StringRef TT) { 74 return new AMDGPUAsmBackend(T); 75 } 76 77 AMDGPUMCObjectWriter * AMDGPUAsmBackend::createObjectWriter( 78 raw_ostream &OS) const { 79 return new AMDGPUMCObjectWriter(OS); 80 } 81
