3.12. __nv_atan2f


float @__nv_atan2f(float %x, float %y) 


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.


Result will be in radians, in the interval [- π /, + π ].
  • __nv_atan2f(0, 1) returns +0.


For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 6.

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes