680c2860fd
r268589 r268590 r268593 r268597 r269758 r270845 r270847 r270893 r270932
r270947 r271147
Merge libm work by kargl, bde and das from the past few months.
Besides optimisations and small bug fixes this includes new implementations
for C99 functions expl, coshl, sinhl, tanhl, erfl and erfcl.
Approved by: re (kib)