mattst88 
I landed some improvements and small optimizations to #pixman's AltiVec code. See https://gitlab.freedesktop.org/pixman/pixman/-/merge_requests/136
It was fun working with a new (to me) instruction set and trying to figure out how to puzzle together the pieces into something that improved the `pix_multiply()` function (which is kind of the core primitive of most fast paths).
I couldn't figure out a way to use the `vec_mradds`/`vmhraddshs` instruction. Maybe you can? (see https://gitlab.freedesktop.org/pixman/pixman/-/merge_requests/136#note_2699795)
