This is low level code written in a library to make full use of AVX-512.. which is inherently a processor native feature that has to be written in a language cl

This is low level code written in a library to make full use of AVX-512.. which is inherently a processor native feature that has to be written in a language close to assembly because the processor only understands machine code.. there is no way to avoid assembly or the pointer arithmetic. Someone has to do the pointer arithmetic so the higher level languages and libraries don't have to.