svn commit: r273274 - head/sys/netpfil/ipfw

[Andriy Gapon]

On 19/10/2014 14:15, Alexander V. Chernikov wrote:
> +static uint32_t
> +roundup2p(uint32_t v)
> +{
> +
> +	v--;
> +	v |= v >> 1;
> +	v |= v >> 2;
> +	v |= v >> 4;
> +	v |= v >> 8;
> +	v |= v >> 16;
> +	v++;
> +
> +	return (v);
> +}

I think that on platforms where an optimized version of fls() is available that
would work faster than this cool piece of bit magic.

-- 
Andriy Gapon