Even if you could, floating point may not be the best representation for control applications. There are a lot of problems, like NaN, as somebody pointed out. Even neglecting that, a fixed point representation may be better.
You don't need the fine precision or large range that floats have (we get those using exponents). Signal variations below a certain threshold are drowned out by the noise floor. Signals in control systems also have an expected maximum bound.
At other end, stability calculations based on quantization noise may be difficult with floats, since their least count changes with exponent. Fixed points have a uniform LC throughout its range.
You don't need the fine precision or large range that floats have (we get those using exponents). Signal variations below a certain threshold are drowned out by the noise floor. Signals in control systems also have an expected maximum bound.
At other end, stability calculations based on quantization noise may be difficult with floats, since their least count changes with exponent. Fixed points have a uniform LC throughout its range.