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libdevice User's Guide (PDF) - CUDA Toolkit v5.5 (older) - Last updated July 19, 2013 - Send Feedback

3.264. __nv_rsqrtf

Prototype:

float @__nv_rsqrtf(float %x) 

Description:

Calculate the reciprocal of the nonnegative square root of x, 1 / x .

Returns:

Returns 1 / x .
  • __nv_rsqrtf( + ) returns +0.

  • __nv_rsqrtf( ± 0 ) returns ± .

  • __nv_rsqrtf(x) returns NaN if x is less than 0.

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 (older) - Last updated July 19, 2013 - Send Feedback