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libdevice User's Guide (PDF) - CUDA Toolkit v5.5 (older) - Last updated May 11, 2013 - Send Feedback

3.106. __nv_fast_logf

Prototype:

float @__nv_fast_logf(float %x) 

Description:

Calculate the fast approximate base e logarithm of the input argument x.

Returns:

Returns an approximation to log e ( x ) .

Note:

For accuracy information for this function see the CUDA C Programming Guide, Appendix C, Table C-4.

Most input and output values around denormal range are flushed to sign preserving 0.0.

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