FNiLog2
Routine
-
int FNiLog2 (int N)
Purpose
-
Find the integer greater than or equal to log (base 2) of a given value
Description
This function returns the number of bits needed to represent N-1, where N is
a given integer value. This routine can be used to find a suitable FFT length
(power of two) for a sequence of length N. The FFT length is 2^m, where m is
the value returned by this routine. The returned value is smallest m
satisfying
2^m >= N.
Parameters
-
<- int FNiLog2
-
Returned integer value
-
-> int N
-
Input value (greater than zero)
Author / revision
P. Kabal
/ Revision 1.7 2003/05/09
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