[Cryptography] Exotic Operations in Primitive Construction

[Sandy Harris]

On Sun, Oct 4, 2020 at 9:27 AM John Tromp <john.tromp at gmail.com> wrote:

> > > As another followup (and I'm not trying to turn this into a C forum), but
> > > can anyone think of a way to flip an n-bit word around i.e. LSB becomes
> > > MSB etc?

This reference gives a half dozen ways:
https://graphics.stanford.edu/~seander/bithacks.html