3.11. __nv_atan2

double @__nv_atan2(double %x, double %y)

Calculate the arc tangent of the ratio of first and second input arguments.

Calculate the principal value of the arc tangent of the ratio of first and second input arguments x / y. The quadrant of the result is determined by the signs of inputs x and y.

Note

For accuracy information, see the CUDA C++ Programming Guide, Mathematical Functions Appendix, Double-Precision Floating-Point Functions section.

Returns

Result will be in radians, in the interval [- \(\pi\) /, + \(\pi\) ].

• __nv_atan2(0, 1) returns +0.