98 times out of 100, Floating Point Exception errors on Alpha are caused by either an uninitialized floating point variable (that happens to have random garbage in it) being used in a calculation, or a floating point "divide by zero" operation. Those are plain and simple program bugs and using the IEEE compiler switches just masks the real problem.
Jeff Donsbach > -----Original Message----- > From: Mike Touloumtzis [mailto:[EMAIL PROTECTED] > Sent: Thursday, November 08, 2001 12:09 AM > To: Daniel Burrows; Christopher C. Chimelis; > [email protected] > Subject: Re: aptitude on alpha (again, sigh) > > > On Thu, Nov 01, 2001 at 04:03:29PM -0500, Daniel Burrows wrote: > > On Thu, Nov 01, 2001 at 03:43:51PM -0500, "Christopher C. > Chimelis" <[EMAIL PROTECTED]> was heard to say: > > > > > > It's an Alpha thing. I started looking into this bug a > few weeks ago, but > > > got busy with other things. One thing I do know that > needs to be done is > > > adding "-mieee" to CFLAGS and CXXFLAGS on Alpha. It > would probably be > > > > Why does this fix the problem? (ie, is this just working > around a bug > > in the code?) The documentation says it has something to do with > > floating-point comparisons being "inexact". Specifically, > it mentions > > handling NaN and +-Inf correctly. This seems to be > indicating that I > > have a divide-by-zero somewhere! > > In all three cases in which I tracked down and fixed one of > these bugs, > the problem was use of an uninitialized floating-point value. > So that's > another possibility. > > miket > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > >
