The output control signal (y) equals the floating-point remainder of
the ratio of the input control signals (x1/ x2),
even if the quotient x1/ x2 is not representable:
Floating-point math function which computes the value x1 - (i * x2 ),
for some integer i such that,
if x2 is non-zero, the result has the same sign as x1 and
magnitude less than the magnitude of x2. If the value of x2is zero,
then the output is also zero.
