Re: IEEE 754 compliance

2008-05-13 Thread Prof J C Nash
There are some resources for testing by Nelson Beebe at http://www.math.utah.edu/~beebe/software/ieee/timops.html From what I understand, the main issues are handling of edge effects (underflow, overflow, divide by 0, etc.) where compilers may do some things different from the standard's

Re: IEEE 754 compliance

2008-05-13 Thread Dave
The 754 standard is being updated and the result is being voted on now, I think. It's called 754r and can be found on the web. 16-bit and 128-bit floating point formats are what led me to it. Dave Feustel On Tue, May 13, 2008 at 08:50:45AM -0400, Prof J C Nash wrote: There are some resources for

Re: IEEE 754 compliance

2008-05-13 Thread Morten Welinder
Gnumeric does not let you access NaN etc. It would interfere with the desired semantics. Morten ___ gnumeric-list mailing list gnumeric-list@gnome.org http://mail.gnome.org/mailman/listinfo/gnumeric-list

Re: IEEE 754 compliance

2008-05-13 Thread Prof J C Nash
The complexities of the edge effects are best kept out of the spreadsheet, as Morten indicates. However, there are some computations that might be influenced by how a particular internal calculation is performed. I was earlier looking at the ends of the Gaussian (normal) distribution where one