3.222. __nv_log1pf

Prototype: 

float @__nv_log1pf(float %x)

Description:

Calculate the value of l o g e ( 1 + x ) of the input argument x.

Returns:

  • __nv_log1pf( ± 0 ) returns − ∞ .

  • __nv_log1pf(-1) returns +0.

  • __nv_log1pf(x) returns NaN for x < -1.

  • __nv_log1pf( + ∞ ) returns + ∞ .

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