clspv

For OpenCL on DX12, the test suite doesn't pass yet. Every Khronos OpenCL 1.2 CTS test passes on at least one hardware driver, but there's none that pass them all. That is why CLon12 isn't submitted to Khronos's compliant products list yet. The pointer semantics that Vulkan has aren't very amenable to implementing a compliant OpenCL implementation on top of. There are also some other limitatons: https://github.com/google/clspv/blob/master/docs/OpenCLCOnVu....

These are not proper pointers, see: https://github.com/google/clspv/blob/master/docs/OpenCLCOnVu... > Pointers are an abstract type - they have no known compile-time size. Using a pointer type as the argument to the sizeof() operator will result in an undefined value. > Pointer-to-integer casts must not be used. > Integer-to-pointer casts must not be used. > Pointers must not be compared for equality or inequality The first one in that list is a quite big limitation, affecting a significant number of scenarios… (And yes, you cannot actually make a compliant OpenCL 1.2 implementation on top of Vulkan, Vulkan has too few features for that purpose)

Some people are working on being able to run OpenCL kernels on Vulkan: https://github.com/google/clspv