Thanks for the confirming that Dmitry. Can you tell me what an alternative way to do a 2D non-power-of-two transform and back - a rough equivalent to fftwf_plan_r2r_2d, that MKL does support? I was using that function to do an in-place cosine only transform.
To date MKL supports only a limited set ofr2rtransforms, specifically 1D stride-1 one-transform-per-call sine and cosine transforms. An option to do 2D cosine with MKL is to implement row-col algorithm using these 1D transforms and transposition functions.