Function log2

util.go:26–32

log2 computes the binary logarithm of x, rounded up to the next integer.

(i uintptr)

// log2 computes the binary logarithm of x, rounded up to the next integer.
func log2(i uintptr) uintptr {
	var n, p uintptr
	for p = 1; p < i; p += p {
		n++
	}
	return n
}