value range propagation for _bitwise_ OR

["Jérôme M. Berger"]

Steven Schveighoffer wrote:
> using your highbit function, which is very neat BTW
> 
	Thanks, but I can't claim credit for it. It's a classical algorithm
which comes up regularly in programming discussions and newsgroups...

> uint maxor(uint mina, uint maxa, uint minb, uint maxb)
> {
>     return maxa | maxb | ((1 << highbit(((1 << (max(highbit(mina ^
> maxa), highbit(minb ^ maxb)) + 1)) - 1) & maxa & maxb)) - 1);
> }
> 
	Neat!

		Jerome
-- 
mailto:jeberger at free.fr
http://jeberger.free.fr
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