Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.Prune svn:mergeinfo from the new branch, as nothing has been mergedhere.Additional commits post-branch will follow.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Add symbol versioning to libm.
Define the LDBL_PREC to be the number of significant bits in a longdouble's mantissa.
Use hardware instructions for sqrt() and sqrtf().