Wrap fpgetround() so internal calls to it (seen on arm, powerpc, and sh)
go direct instead of through the PLT.

ok millert@ kettenis@

It's been a quarter century: we can assume volatile is present with that name.

make an ieeefp regress pass; miod@ ok

I was on drugs when I commited this initially, and still do not understand
how I got libc to compile with this. Blush.

Replace this with a correct implementation, and write a faster fabs()
while the

I was on drugs when I commited this initially, and still do not understand
how I got libc to compile with this. Blush.

Replace this with a correct implementation, and write a faster fabs()
while there.

ok mickey@

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More fp-related libc pieces for hppa.
This enables awk to link.