> Hi Nikolai. ;)
>> Dmitry, could you please explain how to apply CORDIC to exponential
>> function?
> I'm not promising alot but as only will have 20 free minutes to go other
> office location I will search for those docs in backed up database of
> file
> server. I remember that there were many articles in the past how to
> apply
> CORDIC for non standart math functions and hopefully for exponential
> too.
> (There was a discussion somewhere that CORDIC can be applied for that
> but
> doubled iterations are required for some cases)
>> I just recently started to learn about that algorithm and how to use
>> it for magnitude, phase, sine and cosine calculations. But I would
>> like to learn how to use CORDIC for other elementary math. Not much
>> pointers on the net :(
> Try altavista with: +CORDIC +"math*" +"exponent*" I guess it should
> works.
> I played with CORDIC together with vertical math to significantly reduce
> code size and execution time for some correlation based signal
> detection.
> Because it is very easy to do number shifting in vertical math. Special
> thanks to Scott Dattalo and John Payson. You guys opened a door for me
> into such a upside down beautiful world ;)
>> BTW, it doesn't look so good for magnitude calculation. It takes
>> around 1500 cycles for PIC to find sqrt(x^2+y^2), where x, y are 16
>> bit signed numbers. Probably, using good square and square root
>> routines would be faster in that case.
> 1500 is sounding too long.. Probably you are doing correction on
> every iteration not finally ? I'll be curious to look your code if
> that is possible. Looks like a good candidate for optimization ;)
> WBR Dmitry.
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