On 09/11/2009, at 10:55 PM, Alastair Houghton wrote:

It's pretty easy to do a bit count on a fixed-size word (no need for a loop, in fact).


There are some examples of how to do this here, including some really, really clever methods. Is this what you had in mind Alastair?

http://gurmeetsingh.wordpress.com/2008/08/05/fast-bit-counting-routines/

--Graham


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