vexcl

There are several efforts including VexCL [0] expression templates, OpenACC [1] preprocessor, Kokkos [2] template metaprogramming, SYCL [3], and many other similar projects. Parallel programming for non-trivial parallelism is still...non-trivial. [0] https://github.com/ddemidov/vexcl [1] https://www.openacc.org/ [2] https://github.com/kokkos/kokkos [3] https://www.khronos.org/sycl

There is also VexCL [0] and Boost.Compute [1]. Both are quite capable. I myself am working on something similar - it is called Aura but still a long way to go [2]. ViennaCL, VexCL and Boost.Compute focus on maximizing programmer productivity. Converting existing code from i.e. Matlab to accelerator hardware is trivial using these libraries and you get excellent performance quickly. Furthermore, NT2 doesn't get nearly as much publicity as it deserves [3]. Not only does it provide an incredible number of functions ready to use, but it also exploits the vector processing capabilities of modern CPUs. These capabilities are too often ignored by developers or left for non-optimal compiler optimizations to exploit. In my own library Aura, I focus on maximizing performance (over developer convenience). The target audience are developers of real-t