Hi Asad I must admit i don't know how one can find out whether extended precision is being used or not. I think one has to read up on the CPU's information. I only know that most Intel 32bit-Processors use the extended precision http://en.wikipedia.org/wiki/X86 as does AMD Athlon http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/fpu_wp.pdf but i think AMD Opteron does not. But i am no expert in this area - i only found out about this when i mentioned to someone the differences in the results obtained from a 32Bit platform and a 64bit platform. Sorry.
Jody On Mon, Apr 26, 2010 at 4:33 AM, Asad Ali <asa...@gmail.com> wrote: > Hi Jodi, > >> I once got different results when running on a 64-Bit platform instead of >> a 32 bit platform - if i remember correctly, the reason was that on the >> 32-bit platform 80bit extended precision floats were used but on the 64bit >> platform only 64bit floats. > > Could you please give me an idea as how to check this extended precision. > Also I don't use float rather I use only double or long double. > > Cheers, > > Asad > -- > "Statistical thinking will one day be as necessary for efficient citizenship > as the ability to read and write." - H.G. Wells > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users >
