FPU state is per thread, so it's enough to restore it on exit from the library

PR for review: tevador/RandomX #182

tevador: o/

tevador: george here. i sent you the email about tor pow.

tevador: kinda ultra-hosed right now, but i just wanted to tell u that im around in case u want to discuss something, and i might have questions for u later (probs tomorrow) if u have the time

tevador: thanks for the super quick response btw ;)

asn hey, I'll be available on Friday

tevador: great that works!

hi , anyone have node-cryptonote-util for xmr RandomX ?

_ArmannY, check the repos linked to on xmrpool.net

wich is ? poolui or that nodejs-pool ?