On 11/10/2013 06:22 PM, Joe Perches wrote: > > Perhaps the current x86 bitops asm code is being conflated > with the ideal implementation? > Yes, by you. x86 has instructions that operate on signed bitindicies. It doesn't have instructions that operate on unsigned bitindicies. Unless someone is willing to do the work to prove that shift and mask is actually faster than using the hardware instructions (which I doubt, but it is always a possibility), that's what we have. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
