> 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
