3.3. __nv_acosf

Prototype: 

float @__nv_acosf(float %x)

Description:

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

Returns:

Result will be in radians, in the interval [0, π ] for x inside [-1, +1].

  • __nv_acosf(1) returns +0.

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

Note:

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

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes