3.288. __nv_tgammaf

Prototype:

float @__nv_tgammaf(float %x) 

Description:

Calculate the gamma function of the input argument x, namely the value of 0 e t t x 1 d t .

Returns:

  • __nv_tgammaf( ± 0 ) returns ± .

  • __nv_tgammaf(2) returns +0.

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

  • __nv_tgammaf(x) returns NaN if x < 0.

  • __nv_tgammaf( ) returns NaN.

  • __nv_tgammaf( + ) returns + .

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix D.1, Table 6.

Library Availability:

Compute 2.0: Yes

Compute 3.0: Yes

Compute 3.5: Yes