OK, that's awesome. Thank you.
Now, the $100,000 question--how could I have figured this out on my
own?
AFAIK, Header spelunking. And having intimate knowledge of what Altivec
already can do (spent quite a bit of time with it in undergrad...). The
sole mention of vSaxpy() on Apple's site seems to be in the Carbon
porting spec.
Can I have my $100,000 now? :)
--
Reality is what, when you stop believing in it, doesn't go away.
Failure is not an option. It is a privilege reserved for those who try.