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Re: not-a-number's
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?