[Numpy-discussion] Matlab/Numeric/numarray benchmarks

Jason Rennie jrennie at csail.mit.edu
Thu Jan 20 19:10:39 CST 2005


On Fri, Jan 21, 2005 at 11:16:10AM +1100, Simon Burton wrote:
> The next thing would be to write a simple c program that trips this exception,
> because I'm not convinced it is ATLAS's fault. Doesn't Numeric use the same library calls,
> and if so, why doesn't it also trip this exception ?

Turns out the FP exception is a known bug in libc.  Numeric does trip
it (see my "revised numbers" post.  For info on the bug, see, e.g.

 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=279294

I also found that it was discussed earlier on this list.  Search for
"floating point exception weirdness".

Jason




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