I haven't found a way to figure out what features have a OpenCL implementation, that I could use with the Transparent API. For example, in the features2d folder

I haven't found a way to figure out what features have a OpenCL implementation, that I could use with the Transparent API. For example, in the features2d folder only FAST, ORB and BFMatcher have files in the opencl folder, so can't other features be used with OpenCL? Is there a list of features that have OpenCL implementation?