popcount(3) - NetBSD Manual Pages

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POPCOUNT(3)             NetBSD 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 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.

NetBSD 10.0_STABLE              August 22, 2011             NetBSD 10.0_STABLE