3.202. __nv_lgammaf

Prototype:

float @__nv_lgammaf(float %x) 

Description:

Calculate the natural logarithm of the absolute value of the gamma function of the input argument x, namely the value of log e 0 e t t x 1 d t

Returns:

  • __nv_lgammaf(1) returns +0.

  • __nv_lgammaf(2) returns +0.

  • __nv_lgammaf(x) returns ± if the correctly calculated value is outside the double floating point range.

  • __nv_lgammaf(x) returns + if x 0.

  • __nv_lgammaf( ) returns .

  • __nv_lgammaf( + ) 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