3.105. __nv_fast_log2f
Prototype:
float @__nv_fast_log2f(float %x)
Description:
Calculate the fast approximate base 2 logarithm of the input argument x.
Returns:
Returns an approximation to .
Note:
For accuracy information for this function see the CUDA C Programming Guide, Appendix D.2, Table 9.
Input and output in the denormal range is flushed to sign preserving 0.0.
Library Availability:
Compute 2.0: Yes
Compute 3.0: Yes
Compute 3.5: Yes