Implementation for coshl.

[Bruce Evans]

On Mon, 17 Jun 2013, Steve Kargl wrote:

> On Tue, Jun 18, 2013 at 09:29:41AM +1000, Bruce Evans wrote:
>> ...
>> Are you going to finish coshl() and sinhl()?  I'm getting closer to
>> hacking on them.  I'm now in the middle of doing this for cosh():
>
> I won't have time until mid-July to work on coshl, sinhl, and tanhl.
> I leave for an underwater acoustic conference in Greece on Friday,
> and do not return until the 1st week of July.

Send what you have and I will complete it in a few days.  I will probably
merge it into versions derived from the fdlibm ones and use fdlibm style.

Bruce