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Re: TR1 Math Special Functions

Paolo Carlini <pcarlini@suse.de> writes:

> >  Or is there a __builtin_isnan to use?
> >
> Maybe that will just work! ;) I just tried and in mainline apparently
> we are able to fully expand it without library calls. I would ask Ed
> to try simply use the builtin and regtest on as many targets he
> can. It would be nice if a compiler guy could confirm that such
> library calls are never issued for __builtin_isnan irrespective of the
> target. I'm CC-ing Ian... Apparently the documentation is a little
> weak about such builtins..

__builtin_isnan will always be fully expanded.  It may generate a
library call to, e.g., __nedf2, but it will never generate a call to
isnan.

Ian
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