Difference: FloatingPointUnit (26 vs. 27)

Some Hints for Using the FPU

Rounding is not very useful for precision more than 3.

0.1005e fs. 1.01E-1  ok.
0.1005e fm. 101m ok.
4 set-precision
0.100005e fs. 1.0000E-1  ok.
0.100005e fm. 100.00m ok.

Do not use FPU in interrupt service routines.

Tasks/Threads with FPU operations need much more return stack depth.