extracting data from dbls

[falkpl]

I am extracting data from doubles, I have an algorithm which returns 500K array of doubles /sec and will need to get just the first 3 significant digits sign and exponent from this data.  What is the fastest method of extracting these bits from a double?  is there a precanned function?  Do I need to do bitwise manipulation.

Paul

[mikeporter]

What sort of manipulation are you wanting to do? It's fairly easy to extract the 3 most significant decimal digits (see attached) but I'm not sure how far that gets you.

Mike...