Looks that way with a quick test. But it looks like there may be a better way with SSE3 PSHUFB: http://wm.ite.pl/articles/sse-popcount.html http://wm.ite.pl/art

Looks that way with a quick test. But it looks like there may be a better way with SSE3 PSHUFB: http://wm.ite.pl/articles/sse-popcount.html http://wm.ite.pl/articles/sse-popcount.html