> > > The C preprocessor is too basic to do this sort of thing. Functions like > logarithms come from the math library the the preprocessor can't make > use of libraries at compile time. > > This is a PERL script I use to generate sine tables to load onto a > Mega48. It shouldn't be hard to adapt it to generate a log table too:
Ok, I'll have to see what it takes to do this in windows. > Keep in mind there are algorithmic ways too do logs even without > floating point support, they're going to be more compact than a table, > but slower. If speed is your #1 concern then a table is best. Don't > forget to use the appropriate function to read the data out of flash, > you can't just index the array (unfortunately). I'm very pressed for time in this operation. I may need 512 entries in my log table, but I need SPEED. I have several oodles of codespace.
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