hcc

CUDA is proprietary to NVidia, and is pretty much the standard for GPU computing. AMD's been chipping away with OpenCL, Vulkan/GLSL, https://github.com/RadeonOpenCompute/hcc/wiki, etc. but not much luck so far. I wouldn't say AMD's been "sticking with" OpenCL, if anything it seems like they will deprecate it in a few years, as the plan is to fold OpenCL into Vulkan. I guess it is possible to use OpenCL on the CPU as well, but it seems to be intended mostly for testing purposes. The Crysis software renderer uses threads: https://github.com/google/swiftshader/blob/master/src/Common...

https://github.com/GPUOpen-ProfessionalCompute-Tools/HIP/blo... CUDA → HIP translator. HIP is an abstraction over CUDA and AMD's HCC: https://github.com/RadeonOpenCompute/hcc/wiki

AMD's new Boltzmann initiative includes an LLVM-based compiler which has been posted online. I'm not sure what are the plans around an OpenCL fronted, but the backend should be there, so I think an OpenCL support in LLVM for AMD GPUs could be a realistic goal. http://gpuopen.com/compute-product/hcc-heterogeneous-compute... https://github.com/RadeonOpenCompute/hcc