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an open standard for cross-platform, task-based as well as data-based parallel programming of CPUs, [[GPU|GPUs]], [[FPGA|FPGAs]], [https://en.wikipedia.org/wiki/Digital_signal_processor DSPs], including the [[C|C99]] based programming language '''OpenCL C'''. OpenCL C forbids [[Recursion|recursion]], and omits [https://en.wikipedia.org/wiki/Function_pointer function pointers], [https://en.wikipedia.org/wiki/Bit_field bit fields] and [https://en.wikipedia.org/wiki/Variable-length_array variable-length] [[Array|arrays]], but has fixed-length vector types, supporting [[SIMD and SWAR Techniques|SIMD instructions]] if available on the target platforms. OpenCL 2.0 adds features like nested parallelism and shared virtual memory, version 2.1 extends OpenCL C to a subset of C++14. OpenCL 3.0 makes version 1.2 functionality a mandatory baseline with 2.x and 3.x as optional features and replaces 'OpenCL C++' with 'C++ for OpenCL' as a subset of C++17. OpenCL is maintained by the [https://en.wikipedia.org/wiki/Nonprofit_organization nonprofit] technology consortium [https://en.wikipedia.org/wiki/Khronos_Group Khronos Group], adopted by [[Apple]]<ref>[https://appleinsider.com/articles/18/06/04/opengl-opencl-deprecated-in-favor-of-metal-2-in-macos-1014-mojave OpenGL, OpenCL deprecated in favor of Metal 2 in macOS 10.14 Mojave]</ref>, [[Intel]], [https://en.wikipedia.org/wiki/Qualcomm Qualcomm], [[AMD]], [https://en.wikipedia.org/wiki/Nvidia [Nvidia]], [https://en.wikipedia.org/wiki/Altera Altera], [https://en.wikipedia.org/wiki/Samsung Samsung], [https://en.wikipedia.org/wiki/Vivante_Corporation Vivante], [https://en.wikipedia.org/wiki/Imagination_Technologies Imagination Technologies] and [[ARM]] <ref>. = Specifications =* [https://www.khronos.org/registry/OpenCL/specs/opencl-1.2.pdf OpenCL 1.2 Specification]* [https://www.khronos.org/registry/OpenCL//sdk/1.2/docs/man/xhtml/ OpenCL 1.2 Reference]* [https://www.khronos.org/registry/OpenCL/specs/opencl-2.0.pdf OpenCL 2.0 Specification]* [https://www.khronos.org/registry/OpenCL/specs/2.2/pdf/OpenCL_C.pdf OpenCL 2.0 C Language Specification]* [https://www.khronos.org/registry/OpenCL//sdk/2.0/docs/man/xhtml/ OpenCL 2.0 Reference]* [https://www.khronos.org/registry/OpenCL/specs/3.0-unified/pdf/ OpenCL 3.0 Specifications] = OpenCL to Vulkan =The OpenGL graphics API specified by Khronos Group is deprecated in favor for [https://en.wikipedia.org/wiki/Vulkan Vulkan], since Vulkan and OpenCL v1.2/v2.x share [https://en.wikipedia.org/wiki/Standard_Portable_Intermediate_Representation SPIR-V] as an intermediate representation it is possible to cross-compile OpenCL from Wikipediacode via SPIR-V to run on Vulkan enabled devices <ref>[https://github.com/google/clspv clspv] by [[Google]]on GitHub</ref>.

* [https://scholar.google.de/citations?user=ByAvYg4AAAAJ&hl=en Wolfram Schenck] ('''2017'''). ''OpenCL Basics''. [https://www.fz-juelich.de/SharedDocs/Downloads/IAS/JSC/EN/slides/opencl/opencl-03-basics.pdf?__blob=publicationFile slides as pdf]