(a,b,n,m)
return a,b
Cleverer bit manipulation.
Cleverer bit manipulation.
Cleverer bit manipulation .
def _PERM_OP(a,b,n,m):
    """Cleverer bit manipulation."""
    t = ((a >> n) ^ b) & m
    b = b ^ t
    a = a ^ (t << n)
    return a,b
def _PERM_OP ( a , b , n , m ) : t = ( ( a >> n ) ^ b ) & m b = b ^ t a = a ^ ( t << n ) return a , b