Thread: speed of math.h trig functions?
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Unread 03-02-2006, 15:45
Jared Russell's Avatar
Jared Russell Jared Russell is offline
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speed of math.h trig functions?
Hi,

I've always been a proponent of using your own integer-valued CORDIC/table/Taylor series trig functions on the PIC because of the lack of a hardware FPU. I've always been told it's much faster.

The question that is now on my mind is, how much faster? I've noticed a lot of teams this year using the math.h trig functions, floating-points and all.

Has anyone any empirical evidence of the speed difference between the two methods? I might as well use math.h if the difference is small (plus, there would be only a couple of calls per 26ms).