> > > > Before you get that far, what do you want the logs for? And what base (if > it matters)? And what speed and accuracy? If you need low speed and high > accuracy, just use the standard C log function. If you need high speed and > low accuracy and low code space, a find-first-one function will give you a > start. And if you decide that a table is the best answer, consider first > normalizing your numbers (unless you are using floating point, in which case > they are already normalized), and consider using a non-linear table. > Speed is primary, I need to get the conversion absolutely as fast as possible. Accuracy is secondary.
Once I have the logs, the rest of the calculation would be fixed point. My output will be a 16 bit binary value, the sum of N log values. My question comes down to wether it is possible to get the preprocessor to define the values in some form like I described previously. If not, I'll generate them externally.
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