[Bug libstdc++/50880] __complex_acosh() picks wrong complex branch

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50880

--- Comment #15 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-11-02 12:31:09 UTC ---
Ok, thanks for your feedback Gaby. Indeed, I also wondered if we shouldn't work
with the components.

Richard, can you send a version of Kahan's algorithm rewritten in terms of real
and imag, I think we can all agree on that and resolve the PR for good.