As of SBCL 0.8.5 ``good'' functions are @code{+}, @code{-};
@code{logand}, @code{logior}, @code{logxor}, @code{lognot} and their
combinations; and @code{ash} with the positive second
As of SBCL 0.8.5 ``good'' functions are @code{+}, @code{-};
@code{logand}, @code{logior}, @code{logxor}, @code{lognot} and their
combinations; and @code{ash} with the positive second