ceiling function.
cosecant.
Base-2 logarithm.
arctangent.
ceiling function.
cosine.
cotangent.
cosecant.
exponential function.
power of 2.
equivalent to exp(x) - 1, but more accurate when |x| is small.
floor function.
Base-2 logarithm.
Natural logarithm.
equivalent to log(x + 1), but more accurate when |x| is small.
reduce x into [-y .. y] modulo 2y.
secant.
sine.
tangent.