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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 for this function see the CUDA C Programming Guide, Appendix C, Table C-2.

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes


libdevice User's Guide (PDF) - CUDA Toolkit v5.5 for POWER8 (older) - Last updated October 15, 2014 - Send Feedback