On 2012-02-03 10:13:58 -0500, Robert Dewar wrote: > On 2/3/2012 10:01 AM, Michael Matz wrote: > >No normal math library supports such an extreme range, even basic > >identities (like cos^2+sin^2=1) aren't retained with such inputs. > > I agree: the program is complete nonsense.
I disagree: there may be cases where large inputs can be meaningful. And it may be important that some identities (like cos^2+sin^2=1) be preserved. > It would be useful to know what the intent was. If the user requested such a computation, there should at least be some intent. Unless an option like -ffast-math is given, the result should be accurate. For the glibc, I've finally reported a bug here: http://sourceware.org/bugzilla/show_bug.cgi?id=13658 Note that there have been other (somewhat different) complaints in the past, e.g. http://sourceware.org/bugzilla/show_bug.cgi?id=13381 -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <http://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
