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BITOPS(3) Library Functions Manual BITOPS(3)

bitopsfunctions related to bits and integers

#include <sys/bitops.h>

The <sys/bitops.h> header includes macros and functions related to bits and integers. Among these are:
bitmap(3)
bitmap manipulation macros
ffs32(3)
functions to find the first and last bit in integers of type uint32_t and uint64_t
ilog2(3)
a macro for binary logarithm
fast_divide32(3)
a function for fast 32-bit division

bits(3), bitstring(3), cdefs(3), param(3)

The <sys/bitops.h> header first appeared in NetBSD 4.0.

December 4, 2012 NetBSD-9.2