POPCOUNT(3) BSD Library Functions Manual POPCOUNT(3)NAME
popcount, popcountl, popcountll, popcount32, popcount64 — count number of
bits set in a bit string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <strings.h>
unsigned int
popcount(unsigned int value);
unsigned int
popcountl(unsigned long value);
unsigned int
popcountll(unsigned long long value);
#include <stdint.h>
unsigned int
popcount32(uint32_t value);
unsigned int
popcount64(uint64_t value);
DESCRIPTION
The popcount functions returns the number of bits set in value.
SEE ALSOffs(3)HISTORY
The popcount(), popcountl(), popcountll(), popcount32(), and popcount64()
functions appeared in NetBSD 6.0.
BSD August 22, 2011 BSD