http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54192
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-08-07 12:50:16 UTC --- The current reasoning is that the C standard allows the implementation to say that only round-to-nearest is supported but not that the trapping parts of IEEE are not honored. The default should always be standard conformant behavior.
