[Question]: NEON Intrisics

[Mathias-Boulay]

I noticed that ARMv7 NEON Intrisics are present in the codebase, particulary inside mathvec.c file.

Do you remember how much of an impact this made on performance ? I'm considering creating ARMv8 NEON Intrisics if the time spent is worth it.

[ptitSeb]

Unfortunatly, I don't remember any number. It would be nice to have ARMv8 support too, for sure.

[Mathias-Boulay]

Argh, not even an order of magnitude ?
Well, I guess I can create some tests for my use case, it will take a slight while

[ptitSeb]

yeah, nope, sorry.it's too old, I don't remember. I did that at a time when I was putting NEON optim everywhere :)

[Mathias-Boulay]

Well, I'll see later and find out if I did well

[Mathias-Boulay]

Chances are that I better rely on this project: https://github.com/ARM-software/optimized-routines a way or another.

[Mathias-Boulay]

Side note: The android ndk does not allow neon-less compilation since a while now. I assume it now makes extensive use of the extended instructions set