I'm not certain, but I doubt this would substantially improve performance.
What I need is a math library, readily accessible... how can one live without exponentials, hyperbolic secants, and zeta functions!?
I realize that many are available (like the open source Sun Microsystems library, which we ended up using) but it is difficult, with a large library, to pick out the functions you actually need. A library in the firmware or somehow better accessible, with only the functions that one really would need, like trig/powers, would be quite welcome.