On Dec 30, 2008, at 6:38 AM, Walter Banks wrote:

> What transcendental functions do you need? How fast? This last  
> question
> is important in the choice between speed and size.

He's implementing a calculator, so he needs "all" of the functions  
implemented to at least 8 digits of precision, running at (probably)  
somewhere faster than 2 calculations per second, but not as fast as 10  
calculations per second.

I suspect that this is not the sort of performance point that most  
microcontroller compiler libraries are going to be aiming at.  He  
might be better off writing his own floating point libraries from  
scratch.

Does anyone know what sort of data formats most commercial calculators  
use internally?

BillW

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