3.113. __nv_fast_log2f

float @__nv_fast_log2f(float %x)

Calculate the fast approximate base 2 logarithm of the input argument.

Calculate the fast approximate base 2 logarithm of the input argument x.

Note

For accuracy information, see the CUDA C++ Programming Guide, Mathematical Functions Appendix, Intrinsic Functions section.

Note

Input and output in the denormal range is flushed to sign preserving 0.0.