__device__ float __powf ( float  x,
float  y 
)

Calculate the fast approximate of x, the first input argument, raised to the power of y, the second input argument, $x^y$.

Returns:
Returns an approximation to $x^y$.
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.


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