At 01:00 1994/07/03 -0400, tim werner wrote:

This instruction would be useful in all sorts of applications. I was just wishing I had such a thing only last week. I had to write a little loop to check the number of bits set in a word. Each bit represented an action, and in my particular case it was an error if more than 1 action was requested. The loop was really a waste when you consider that it could have been done in 1 instruction.

tw In C, {int j... if(j & (j-1)) not_exactly_one_bit; ...}