On Wed, 2010-02-03 at 19:14 +0100, Borislav Petkov wrote:> alternative("call hweightXX", "popcnt", X86_FEATURE_POPCNT)Make sure to apply a 0xff bitmask to the popcnt r16 call for hweight8(),and hweight64() needs a bit of magic for 32bit, but yes, something likethat ought to work nicely.