>>PS. Are you sure you linked against avr-libc's math library? >> >>It linked against the libc math libraries . > > >How exactly? > > I checked the map files and also passed the -lm option.
Also checked the disassembly to ensure that the correct functions are linked and also stepped through it. > > > >> >>Also adding to the points mentioned above, is it required to use the >>logrithms for getting this done as we explicitly say the second argument of >>pow should be an integer ? > >I don't know who is "we" (Atmel? :-) ) but > > http://svn.savannah.nongnu.org/viewvc/trunk/avr-libc/libm/fplib/pow.S?revision=2191&root=avr-libc&view=markup has a comment saying nonintegral y is not leagal, looking into it more closely, it looks to be for handling the case of complex numbers. Mysuggestion was handling the cases where power required is a whole number or an integer separately so that accuracy for them can be improved rather than going by the exponent method. http://en.wikipedia.org/wiki/Exponentiation_by_squaring This involves the recursive calls, I am unsure of the tradeoff between this method and using the method of exponents. -George- _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/avr-libc-dev
