Add retguard macros to libm assembly.
ok deraadt

Reduce libm's exports and make internal calls go direct.
All dependencies on libc are now via reserved/standardized names.

ok kettenis@ millert@ deraadt@

Add missing $OpenBSD$ tags.
Zap wasteful RCSID("$NetBSD$")

okay deraadt@

add libm parts for amd64; much from netbsd, integration by mickey.
Instead of mixing the i387 & xmm register components, we decide to
explicitly seperate them. libm is already confusing enough as i

add libm parts for amd64; much from netbsd, integration by mickey.
Instead of mixing the i387 & xmm register components, we decide to
explicitly seperate them. libm is already confusing enough as it is,
thank you very much

show more ...