+++ /dev/null
-//===-- AMDGPUAsmBackend.cpp - AMDGPU Assembler Backend -------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-/// \file
-//===----------------------------------------------------------------------===//
-
-#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
-#include "MCTargetDesc/AMDGPUFixupKinds.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/MC/MCAsmBackend.h"
-#include "llvm/MC/MCAssembler.h"
-#include "llvm/MC/MCFixupKindInfo.h"
-#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/MC/MCValue.h"
-#include "llvm/Support/TargetRegistry.h"
-
-using namespace llvm;
-
-namespace {
-
-class AMDGPUMCObjectWriter : public MCObjectWriter {
-public:
- AMDGPUMCObjectWriter(raw_pwrite_stream &OS) : MCObjectWriter(OS, true) {}
- void executePostLayoutBinding(MCAssembler &Asm,
- const MCAsmLayout &Layout) override {
- //XXX: Implement if necessary.
- }
- void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
- const MCFragment *Fragment, const MCFixup &Fixup,
- MCValue Target, bool &IsPCRel,
- uint64_t &FixedValue) override {
- assert(!"Not implemented");
- }
-
- void writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override;
-
-};
-
-class AMDGPUAsmBackend : public MCAsmBackend {
-public:
- AMDGPUAsmBackend(const Target &T)
- : MCAsmBackend() {}
-
- unsigned getNumFixupKinds() const override { return AMDGPU::NumTargetFixupKinds; };
- void applyFixup(const MCFixup &Fixup, char *Data, unsigned DataSize,
- uint64_t Value, bool IsPCRel) const override;
- bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value,
- const MCRelaxableFragment *DF,
- const MCAsmLayout &Layout) const override {
- return false;
- }
- void relaxInstruction(const MCInst &Inst, MCInst &Res) const override {
- assert(!"Not implemented");
- }
- bool mayNeedRelaxation(const MCInst &Inst) const override { return false; }
- bool writeNopData(uint64_t Count, MCObjectWriter *OW) const override;
-
- const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override;
-};
-
-} //End anonymous namespace
-
-void AMDGPUMCObjectWriter::writeObject(MCAssembler &Asm,
- const MCAsmLayout &Layout) {
- for (MCAssembler::iterator I = Asm.begin(), E = Asm.end(); I != E; ++I) {
- Asm.writeSectionData(&*I, Layout);
- }
-}
-
-void AMDGPUAsmBackend::applyFixup(const MCFixup &Fixup, char *Data,
- unsigned DataSize, uint64_t Value,
- bool IsPCRel) const {
-
- switch ((unsigned)Fixup.getKind()) {
- default: llvm_unreachable("Unknown fixup kind");
- case AMDGPU::fixup_si_sopp_br: {
- uint16_t *Dst = (uint16_t*)(Data + Fixup.getOffset());
- *Dst = (Value - 4) / 4;
- break;
- }
-
- case AMDGPU::fixup_si_rodata: {
- uint32_t *Dst = (uint32_t*)(Data + Fixup.getOffset());
- *Dst = Value;
- break;
- }
-
- case AMDGPU::fixup_si_end_of_text: {
- uint32_t *Dst = (uint32_t*)(Data + Fixup.getOffset());
- // The value points to the last instruction in the text section, so we
- // need to add 4 bytes to get to the start of the constants.
- *Dst = Value + 4;
- break;
- }
- }
-}
-
-const MCFixupKindInfo &AMDGPUAsmBackend::getFixupKindInfo(
- MCFixupKind Kind) const {
- const static MCFixupKindInfo Infos[AMDGPU::NumTargetFixupKinds] = {
- // name offset bits flags
- { "fixup_si_sopp_br", 0, 16, MCFixupKindInfo::FKF_IsPCRel },
- { "fixup_si_rodata", 0, 32, 0 },
- { "fixup_si_end_of_text", 0, 32, MCFixupKindInfo::FKF_IsPCRel }
- };
-
- if (Kind < FirstTargetFixupKind)
- return MCAsmBackend::getFixupKindInfo(Kind);
-
- return Infos[Kind - FirstTargetFixupKind];
-}
-
-bool AMDGPUAsmBackend::writeNopData(uint64_t Count, MCObjectWriter *OW) const {
- OW->WriteZeros(Count);
-
- return true;
-}
-
-//===----------------------------------------------------------------------===//
-// ELFAMDGPUAsmBackend class
-//===----------------------------------------------------------------------===//
-
-namespace {
-
-class ELFAMDGPUAsmBackend : public AMDGPUAsmBackend {
-public:
- ELFAMDGPUAsmBackend(const Target &T) : AMDGPUAsmBackend(T) { }
-
- MCObjectWriter *createObjectWriter(raw_pwrite_stream &OS) const override {
- return createAMDGPUELFObjectWriter(OS);
- }
-};
-
-} // end anonymous namespace
-
-MCAsmBackend *llvm::createAMDGPUAsmBackend(const Target &T,
- const MCRegisterInfo &MRI,
- const Triple &TT, StringRef CPU) {
- return new ELFAMDGPUAsmBackend(T);
-}