POPCOUNT(3) Library Functions Manual POPCOUNT(3)
NAME
popcount, popcountl, popcountll, popcount32, popcount64count 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);
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 ALSO
HISTORY
The popcount(), popcountl(), popcountll(), popcount32(), and popcount64() functions appeared in NetBSD 6.0.