3.3. __nv_acosf

float @__nv_acosf(float %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, Single-Precision Floating-Point Functions section.

Returns

Result will be in radians, in the interval [0, \(\pi\) ] for x inside [-1, +1].

  • __nv_acosf(1) returns +0.

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