David Wallace <dar### [at] earthlinknet> wrote:
> So, what is the fastest and easiest way to detect NaN floats and vectors?

  There isn't.

  What happens eg. with a division by 0 is completely system-dependant,
and even whether you get a 'NaN' value or something else is
system-dependant. (In fact, the 'NaN' value itself is system-dependant
because not all architectures implement the IEEE floating point numbers.)
  There's no portable way of testing "is this value a NaN?".

  The only way you can prevent it from happening is to test the
operands of the division prior to performing the division.

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