| * software is freely granted, provided that this notice | |
| * Input iy indicates whether y is 0. (if iy=0, y assume to be 0). | |
| * 1. Since sin(-x) = -sin(x), we need only to consider positive x. | |
| * | |
| * | x | | |
| * | |
| * For better accuracy, let | |
| static const double | |
| static double | |
| int32_t ix; |