It's a fun trick I've used for years, I think originally I gleaned it from http://graphics.stanford.edu/~seander/bithacks.html http://graphics.stanford.edu/~sea

It's a fun trick I've used for years, I think originally I gleaned it from http://graphics.stanford.edu/~seander/bithacks.html http://graphics.stanford.edu/~seander/bithacks.html (or maybe not, now that I look through that page - though it is full of goodies)