On 16 January 2013 08:59, Mischa Baars wrote: > On 01/16/2013 08:57 AM, Eric Botcazou wrote: >>> >>> Well, I have an Intel manual here that states that any operation on a >>> QNaN should return a QNaN, which means that also the compare should >>> return a QNaN when one or both of the arguments is a QNaN. >> >> No, that isn't how comparisons work. The correct result is 2 according to >> the >> comparison rules of IEEE-754. I'd suggest reading page 8 of "Lecture >> Notes on >> the Status of IEEE 754" by Kahan: >> http://www.cs.berkeley.edu/~wkahan/ieee754status/IEEE754.PDF >> > Well, this is just a document of another teacher, this is not the Intel > manual. Please read the other mail for me with the output of the 'ftst' > instruction.
Do you know who Kahan is?