Avoidability\Miss Formula

Bitshifting >> 1 is the same thing as dividing by 2 and rounding down. Cool find. I guess the only thing that applies for most people is (2/9)*(avoid/acc).

Edit: I just realized that your avatar is a glider.

Oh I didn't know that. nice.

And yes, its a glider :f6:

EDIT: You are talking about SHR. SAR is arithmetic, so if the most significant bit is 1 you need to add another 1 to the left.
e.g. sar'ing the binary string 10000010 would result in 11000001