3.249. __nv_powf

Prototype:

float @__nv_powf(float %x, float %y) 

Description:

Calculate the value of x to the power of y

Returns:

  • __nv_powf( ± 0 , y) returns ± for y an integer less than 0.

  • __nv_powf( ± 0 , y) returns ± 0 for y an odd integer greater than 0.

  • __nv_powf( ± 0 , y) returns +0 for y > 0 and not and odd integer.

  • __nv_powf(-1, ± ) returns 1.

  • __nv_powf(+1, y) returns 1 for any y, even a NaN.

  • __nv_powf(x, ± 0 ) returns 1 for any x, even a NaN.

  • __nv_powf(x, y) returns a NaN for finite x < 0 and finite non-integer y.

  • __nv_powf(x, ) returns + for | x | < 1 .

  • __nv_powf(x, ) returns +0 for | x | > 1 .

  • __nv_powf(x, + ) returns +0 for | x | < 1 .

  • __nv_powf(x, + ) returns + for | x | > 1 .

  • __nv_powf( , y) returns -0 for y an odd integer less than 0.

  • __nv_powf( , y) returns +0 for y < 0 and not an odd integer.

  • __nv_powf( , y) returns for y an odd integer greater than 0.

  • __nv_powf( , y) returns + for y > 0 and not an odd integer.

  • __nv_powf( + , y) returns +0 for y < 0.

  • __nv_powf( + , y) returns + for y > 0.

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