3.2. __nv_acos

double @__nv_acos(double %x)

Calculate the arc cosine of the input argument.

Calculate the principal value of the arc cosine of the input argument x.

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 [0, \(\pi\) ] for x inside [-1, +1].

  • __nv_acos(1) returns +0.

  • __nv_acos(x) returns NaN for x outside [-1, +1].