SYCLomatic

• Introduction
• Releases
• Build from source code
• Run SYCLomatic
• Known Issues and Limitations
• Useful Links
• License
• Contributing

Introduction

SYCLomatic is a project to assist developers in migrating their existing code written in different programming languages to the SYCL* C++ heterogeneous programming model. Final code editing and verification is a manual process done by the developer.

Use c2s command to make it as easy as possible to migrate existing CUDA codebases to SYCL, which is an industry standard. Once code is migrated to SYCL, it can be compiled and executed by any compiler that implements the SYCL specification as shown here: https://www.khronos.org/sycl/

The SYCLomatic development branch is the SYCLomatic branch.

Releases

Daily builds of the SYCLomatic branch on Linux and Windows* are available at releases. A few times a year, we publish Release Notes to highlight all important changes made in the project: features implemented and issues addressed. The corresponding builds can be found using search in daily releases. None of the branches in the project are stable or rigorously tested for production quality control, so the quality of these releases is expected to be similar to the daily releases.

Build from source code

Prerequisites

• git - Download
• cmake version 3.14 or later - Download
• python 3 - Download
• ninja - Download
• C++ compiler
  • Linux: GCC version 7.5.0 or later (including libstdc++) - Download
  • Windows: Visual Studio 2019 or 2022 - Download

Create SYCLomatic workspace

Throughout this document SYCLOMATIC_HOME denotes the path to the local directory created as SYCLomatic workspace. It might be useful to create an environment variable with the same name.

Linux:

export SYCLOMATIC_HOME=~/workspace
export PATH_TO_C2S_INSTALL_FOLDER=~/workspace/c2s_install
mkdir $SYCLOMATIC_HOME
cd $SYCLOMATIC_HOME

git clone https://github.com/oneapi-src/SYCLomatic.git

Windows (64-bit):

Open a developer command prompt using one of two methods:

• Click start menu and search for "x64 Native Tools Command Prompt for VS XXXX", where XXXX is a version of installed Visual Studio.
• Ctrl-R, write "cmd", click enter, then run "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" x64

set SYCLOMATIC_HOME=%USERPROFILE%\workspace
set PATH_TO_C2S_INSTALL_FOLDER=%USERPROFILE%\workspace\c2s_install
mkdir %SYCLOMATIC_HOME%
cd %SYCLOMATIC_HOME%

git clone https://github.com/oneapi-src/SYCLomatic.git

Build SYCLomatic

Linux:

cd $SYCLOMATIC_HOME
mkdir build
cd build
cmake -G Ninja -DCMAKE_INSTALL_PREFIX=$PATH_TO_C2S_INSTALL_FOLDER  -DCMAKE_BUILD_TYPE=Release  -DLLVM_ENABLE_PROJECTS="clang"  -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" ../SYCLomatic/llvm
ninja install-c2s

Windows (64-bit):

cd %SYCLOMATIC_HOME%
mkdir build
cd build
cmake -G Ninja -DCMAKE_INSTALL_PREFIX=%PATH_TO_C2S_INSTALL_FOLDER%  -DCMAKE_BUILD_TYPE=Release  -DLLVM_ENABLE_PROJECTS="clang"  -DLLVM_TARGETS_TO_BUILD="X86;NVPTX" ..\SYCLomatic\llvm
ninja install-c2s

Note: For build system with 16G or less memory, to avoid out of memory issues, it is recommended to add the option -DLLVM_PARALLEL_LINK_JOBS=1 in the CMake step and use 4 or less total parallel jobs when building SYCLomatic by invoking ninja with the option -j4:

ninja -j4 install-c2s

build success message:

After a successful build, you should be able to see following message in the terminal output.

-- Install configuration: "Release"
-- Installing: ... bin/dpct
-- Creating c2s

Environment Setup

Linux:

export PATH=$PATH_TO_C2S_INSTALL_FOLDER/bin:$PATH
export CPATH=$PATH_TO_C2S_INSTALL_FOLDER/include:$CPATH

Windows (64-bit):

SET PATH=%PATH_TO_C2S_INSTALL_FOLDER%\bin;%PATH%
SET INCLUDE=%PATH_TO_C2S_INSTALL_FOLDER%\include;%INCLUDE%
SET CPATH=%PATH_TO_C2S_INSTALL_FOLDER%\include;%CPATH%

Verify the Installation

Before running SYCLomatic, it is important to verify that dpct/c2s(SYCLomatic binary) is installed correctly and PATH is set properly.

To do this, try running the following command and checking if dpct is available after the installation.

c2s --version

Note: If c2s cannot be found, please check the setup of PATH.

Run SYCLomatic

Run c2s command

Get c2s help information by running "c2s --help". dpct is an alias command for c2s.

Test SYCLomatic

Run in-tree LIT tests

Note: Certain CUDA header files may need to be accessible to the tool. After build the SYCLomatic, you can run the list test by:

ninja check-clang-c2s

Run E2E test suite (Recommend for contributors)

Follow instructions from the link below to build and run tests: README

Known Issues and Limitations

• SYCL* 2020 support work is in progress.
• 32-bit host/target is not supported.

Useful Links

• More information about how to use SYCLomatic can be found in the SYCLomatic online document:
  • Get Started
  • Developer Guide and Reference
• oneAPI DPC++ Compiler documentation
• Book: Mastering Programming of Heterogeneous Systems using C++ & SYCL
• Essentials of SYCL training
• oneAPI specification: https://spec.oneapi.io/versions/latest/index.html
• SYCL* 2020 specification: https://www.khronos.org/registry/SYCL/
• More information on oneAPI and DPC++ is available at https://www.oneapi.com/

License

See LICENSE for details.

Contributing

See CONTRIBUTING.md for details.

Trademarks information

Intel, the Intel logo, and other Intel marks are trademarks of Intel Corporation or its subsidiaries.
*Other names and brands may be claimed as the property of others. SYCL is a trademark of the Khronos Group Inc.