Manual browser: ilog2(3)
|ILOG2(3)||Library Functions Manual||ILOG2(3)|
NAMEilog2 — integer logarithm
DESCRIPTIONThe ilog2() macro returns an integer (binary) logarithm of x. It is the logarithm for base 2; the binary logarithm of x is the power to which the number 2 must be raised to obtain the value x.
The type of the input parameter should be either uint32_t or uint64_t.
ERRORSA value -1 is returned on error.
HISTORYThe ilog2() macro first appeared in NetBSD 5.0.
|May 10, 2011||NetBSD 7.0|