[eigen] Eigen to use OpenCL on GPUs and FPGAs using SYCL.

[Luke Iwanski <luke@xxxxxxxxxxxx>]

Hi all,

We at Codeplay would like to port Eigen to use OpenCL for acceleration 
on GPUs and FPGAs by using the SYCL open standard for C++ on OpenCL. The 
design of the SYCL standard should integrate quite easily with Eigen as 
it supports C++ template metaprogramming for offloading to accelerators.

Our plan currently is to start by porting tensor to use SYCL on top of 
OpenCL.

Is anyone looking into porting tensor or any other parts of Eigen to 
OpenCL? Is there interest in a SYCL approach? And if so, any advice on 
where we should start?

Thanks,
Luke