RH 7.3 and NaN

[Shameem Akhter_1]

Hi,

Anybody encountered any issue related to NaN for a floating point operation on xw8000 RedHat 7.3 platform. If so, please let me know. I am currently investigating an issue which relates to NaN.

Regards,

-- SA

[Paul Cross_1]

I have to ask: What's Nan?

[Shameem Akhter_1]

NaN stands for "Not A Number".

[Abdul Rahiman]

I got a thread from a google search, this may help.. just being a search helper ..

http://www.linuxquestions.org/questions/archive/9/2004/01/2/133415

[David Asgeirsson]

I do a lot of scientific programming in physics, so I've seen these all the time. There is a bug somewhere in your program.

Some of the main ones are:

-divide by zero
-log of a negative number
-sqrt of a negative number
-passing a float to a function expecting a double and vice-versa

It is the systems way of saying that you have performed illegal arithmetic. These problems should be basically platform independent, the NaN response I believe is based on IEEE floating point standards.

Sorry, it looks like you will need to debug some code.