Author :
Alexei Podtelezhnikov
Date :
2014-11-09 23:22:43
Hash :2e73a1b4 Message :[base] CORDIC improvements.
The scaling between the hypotenuse and its CORDIC approximation is
based on regression analysis. The smaller padding for `theta' is
justifed by its maximum error of less than 6.
* src/base/fttrigon.c (ft_trig_downscale): Borrow code from
./ftcalc.c (ft_multo64), change linear intercept.
(ft_trig_pseudo_polarize): Decrease `theta' padding.