Jörn Engel (joern.delete@this.purestorage.com) on May 17, 2022 5:14 pm wrote:
> Charlie Burnes (charlie.burnes.delete@this.no-spam.com) on May 17, 2022 4:05 pm wrote:
> > OpenMP is most known for shared memory multiprocessing but SIMD directives were added in 2013
> > with OpenMP 4.0. One advantage of using OpenMP SIMD directives is that the source code can make
> > use of AVX512 when it is present and the code still runs on processors that do not have AVX512.
> > Another advantage is the programmer does not have to handle the case were the loop iteration
> > count is not a multiple of the SIMD width. That code gets generated automatically.
>
> Doesn't excite me very much, to be honest. But if you find
> it useful for your projects, don't let my opinion stop you.

To expand on this a bit, I believe omp simd has a (near-)total lack of operations that cannot be expressed as C++ operators. By contrast, Highway provides about 100 such ops:

https://github.com/google/highway/blob/master/g3doc/quick_reference.md#operations