wineport: Add support for ctz().
amartinson at codeweavers.com
Thu Mar 17 15:04:12 CDT 2011
On 03/17/2011 02:04 PM, Alexander Kochetkov wrote:
>> For my purposes the 'return -1' path will never be taken, so it's not
>> needed. I want to be able to do:
>> while (bitmap)
>> i = ctz(bitmap); /* get the LSB index */
>> bitmap ^= 1<< i; /* zero LSB */
>> /* for each set bit i... */
>> If there's a faster way to do this I'm all ears.
> while (bitmap)
> bitmap = (bitmap& (bitmap - 1)); /* zero LSB */
> /* for each set bit i... */
> You could try this solution to zero lsb.
Yes, that's another way to zero the LSB, but I need the index (i).
More information about the wine-devel