This document includes math equations (highlighted in red) which are best viewed with Firefox version 4.0 or higher, or another MathML-aware browser. There is also a PDF version of this document.
libdevice User's Guide (PDF) - CUDA Toolkit v5.5 (older) - Last updated May 11, 2013 - Send Feedback

3.172. __nv_frsqrt_rn

Prototype:

float @__nv_frsqrt_rn(float %x) 

Description:

Compute the reciprocal square root of x in round-to-nearest-even mode.

Returns:

Returns 1 / x .

Note:

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

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 May 11, 2013 - Send Feedback