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 return the number of bits set in
value.
SEE ALSO
ffs(3)
HISTORY
The
popcount(),
popcountl(),
popcountll(),
popcount32(), and
popcount64() functions appeared in
NetBSD
6.0.