Function: math-integer-log2

math-integer-log2 is an autoloaded and byte-compiled function defined in calc-bin.el.gz.

Signature

(math-integer-log2 N)

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calc-bin.el.gz
(defun math-integer-log2 (n)    ; [I I] [Public]
  (and (natnump n)
       (not (zerop n))
       (zerop (logand n (1- n)))
       (logb n)))