current support for clCreateSubBuffer function

Anyone can advice the SDK support status of the clCreateSubBuffer function?

Im using Quartus Prime / OpenCL SDK v15.1.2 with Stratix V board.

A bit more details:

trying to create a sub-buffer from a buffer that has already been transferred to the DDR using clEnqueueWriteBuffer, after passing the sub-buffer for kernel processing, the data read out are all zeros. (note: no errors during compile and run)

thanks!