https://en.wikipedia.org/wiki/OpenCL#Implementations
There is a certain "installable client driver loader (ICD loader)" which forwards calls to the proprietary implementation.
https://www.khronos.org/news/permalink/opencl-installable-client-driver-icd-loader
TODO how to use it.
http://www.x.org/wiki/XorgEVoC/GalliumCompute/
Looks like the major open source implementation. MIT and LLVM based.
Implements it, but way after CUDA features.
- http://stackoverflow.com/questions/20086153/is-there-a-way-to-upgrade-to-opencl-2-0
- https://streamcomputing.eu/blog/2012-09-10/nvidias-industry-leading-support-for-opencl/
Likely their monopoly + anti antitrust tactic.
Offers official Ubuntu packages as of 15.10.
TODO why are many symbols missing even though NVIDIA claims to support a given OpenCL version?
clCreateSubBufferclEnqueueReadBufferRect
Threads:
- https://devtalk.nvidia.com/default/topic/572548/support-for-opencl-1-2-gtx-690-ubuntu
- http://stackoverflow.com/questions/3271243/clcreatesubbuffer-not-found-oo
- https://devtalk.nvidia.com/default/topic/486564/nvidia-39-s-opencl-1-1-and-clcreatesubbuffer/
OpenCL 2 announced in 2017:
- http://stackoverflow.com/questions/29219307/opencl-2-0-on-nvidia-graphics-cards
- https://devtalk.nvidia.com/default/topic/954622/opencl-2-x-support-plans-/
but hardware support will very likely be / is already there because of Vulkan / OpenCL 2 convergence.
OpenCL 1.2 apparently added in driver 350.12, on Kepler hardware and up.
http://stackoverflow.com/questions/19141272/opencl-implementation-for-intel-core-i5-linux
No official Linux packages.
- http://askubuntu.com/questions/545763/installation-of-intel-opencl
- http://askubuntu.com/questions/629456/intel-opencl-on-14-04
Beignet looks like an open source implementation for Intel's embedded GPU: https://www.freedesktop.org/wiki/Software/Beignet/ TODO reversed or documented?
https://www.altera.com/products/design-software/embedded-software-developers/opencl/overview.html
- http://repo.or.cz/w/ppcg.git C99 to OpenCL.
Slow but portable, and a sanity check that OpenCL is actually making anything faster:
Portable OpenCL implementation.