This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: not-a-number's
> 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
--
Eric Botcazou