6c69427e88
The patch adds SPIRV-specific MC layer implementation, SPIRV object file support and SPIRVInstPrinter. Differential Revision: https://reviews.llvm.org/D116462 Authors: Aleksandr Bezzubikov, Lewis Crawford, Ilia Diachkov, Michal Paszkowski, Andrey Tretyakov, Konrad Trifunovic Co-authored-by: Aleksandr Bezzubikov <zuban32s@gmail.com> Co-authored-by: Ilia Diachkov <iliya.diyachkov@intel.com> Co-authored-by: Michal Paszkowski <michal.paszkowski@outlook.com> Co-authored-by: Andrey Tretyakov <andrey1.tretyakov@intel.com> Co-authored-by: Konrad Trifunovic <konrad.trifunovic@intel.com>
77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
//===- llvm/MC/MCSPIRVObjectWriter.cpp - SPIR-V Object Writer ----*- C++ *-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/MC/MCAssembler.h"
|
|
#include "llvm/MC/MCSPIRVObjectWriter.h"
|
|
#include "llvm/MC/MCSection.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Support/EndianStream.h"
|
|
|
|
using namespace llvm;
|
|
|
|
class SPIRVObjectWriter : public MCObjectWriter {
|
|
::support::endian::Writer W;
|
|
|
|
/// The target specific SPIR-V writer instance.
|
|
std::unique_ptr<MCSPIRVObjectTargetWriter> TargetObjectWriter;
|
|
|
|
public:
|
|
SPIRVObjectWriter(std::unique_ptr<MCSPIRVObjectTargetWriter> MOTW,
|
|
raw_pwrite_stream &OS)
|
|
: W(OS, support::little), TargetObjectWriter(std::move(MOTW)) {}
|
|
|
|
~SPIRVObjectWriter() override {}
|
|
|
|
private:
|
|
void recordRelocation(MCAssembler &Asm, const MCAsmLayout &Layout,
|
|
const MCFragment *Fragment, const MCFixup &Fixup,
|
|
MCValue Target, uint64_t &FixedValue) override {}
|
|
|
|
void executePostLayoutBinding(MCAssembler &Asm,
|
|
const MCAsmLayout &Layout) override {}
|
|
|
|
uint64_t writeObject(MCAssembler &Asm, const MCAsmLayout &Layout) override;
|
|
void writeHeader(const MCAssembler &Asm);
|
|
};
|
|
|
|
void SPIRVObjectWriter::writeHeader(const MCAssembler &Asm) {
|
|
constexpr uint32_t MagicNumber = 0x07230203;
|
|
|
|
// TODO: set the version on a min-necessary basis (just like the translator
|
|
// does) requires some refactoring of MCAssembler::VersionInfoType.
|
|
constexpr uint32_t Major = 1;
|
|
constexpr uint32_t Minor = 0;
|
|
constexpr uint32_t VersionNumber = 0 | (Major << 16) | (Minor << 8);
|
|
// TODO: check if we could use anything other than 0 (spec allows).
|
|
constexpr uint32_t GeneratorMagicNumber = 0;
|
|
// TODO: do not hardcode this as well.
|
|
constexpr uint32_t Bound = 900;
|
|
constexpr uint32_t Schema = 0;
|
|
|
|
W.write<uint32_t>(MagicNumber);
|
|
W.write<uint32_t>(VersionNumber);
|
|
W.write<uint32_t>(GeneratorMagicNumber);
|
|
W.write<uint32_t>(Bound);
|
|
W.write<uint32_t>(Schema);
|
|
}
|
|
|
|
uint64_t SPIRVObjectWriter::writeObject(MCAssembler &Asm,
|
|
const MCAsmLayout &Layout) {
|
|
uint64_t StartOffset = W.OS.tell();
|
|
writeHeader(Asm);
|
|
for (const MCSection &S : Asm)
|
|
Asm.writeSectionData(W.OS, &S, Layout);
|
|
return W.OS.tell() - StartOffset;
|
|
}
|
|
|
|
std::unique_ptr<MCObjectWriter>
|
|
llvm::createSPIRVObjectWriter(std::unique_ptr<MCSPIRVObjectTargetWriter> MOTW,
|
|
raw_pwrite_stream &OS) {
|
|
return std::make_unique<SPIRVObjectWriter>(std::move(MOTW), OS);
|
|
}
|