These elements compute some of the more frequently needed functions.
step(in, out) [if (in <= 0) then 0 else 1] -> out
sin(in, out) sine(in) -> out
cos(in, out) cosine(in) -> out
atan(in_y, in_x, out) arctangent(in_y/in_x)/(2*PI) -> out
sqrt(in, out) squareroot(in) -> out