I came across this long ago. But it shows some very nice ways to fiddle bits. It has a few different ways to do it. Which would be handy on systems that do n

I came across this long ago. But it shows some very nice ways to fiddle bits. It has a few different ways to do it. Which would be handy on systems that do not have a popcount. https://graphics.stanford.edu/~seander/bithacks.html https://graphics.stanford.edu/~seander/bithacks.html