CREATE EXTENSION popcount;
ERROR:  extension "popcount" already exists
SELECT popcountAsm(15::bit(4));
 popcountasm 
-------------
           4
(1 row)

SELECT popcountAsm(7::bit(4));
 popcountasm 
-------------
           3
(1 row)

SELECT popcountAsm(15::bit(8));
 popcountasm 
-------------
           4
(1 row)

SELECT popcountAsm(7::bit(8));
 popcountasm 
-------------
           3
(1 row)

SELECT popcountAsm(15::bit(12));
 popcountasm 
-------------
           4
(1 row)

SELECT popcountAsm(7::bit(12));
 popcountasm 
-------------
           3
(1 row)

SELECT popcountAsm(15::bit(32));
 popcountasm 
-------------
           4
(1 row)

SELECT popcountAsm(7::bit(32));
 popcountasm 
-------------
           3
(1 row)

SELECT popcountAsm(30::bit(32));
 popcountasm 
-------------
           4
(1 row)

SELECT popcountAsm(127::bit(32));
 popcountasm 
-------------
           7
(1 row)

SELECT popcountAsm(b'10101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010');
 popcountasm 
-------------
         263
(1 row)

SELECT sum(popcountAsm(x::bit(512))) from generate_series(1,1000000) x;
   sum   
---------
 9884999
(1 row)

SELECT sum(popcountAsm(x::bit(500))) from generate_series(1,1000000) x;
   sum   
---------
 9884999
(1 row)

SELECT popcountAsm64(15::bit(4));
 popcountasm64 
---------------
             4
(1 row)

SELECT popcountAsm64(7::bit(4));
 popcountasm64 
---------------
             3
(1 row)

SELECT popcountAsm64(15::bit(8));
 popcountasm64 
---------------
             4
(1 row)

SELECT popcountAsm64(7::bit(8));
 popcountasm64 
---------------
             3
(1 row)

SELECT popcountAsm64(15::bit(12));
 popcountasm64 
---------------
             4
(1 row)

SELECT popcountAsm64(7::bit(12));
 popcountasm64 
---------------
             3
(1 row)

SELECT popcountAsm64(15::bit(32));
 popcountasm64 
---------------
             4
(1 row)

SELECT popcountAsm64(7::bit(32));
 popcountasm64 
---------------
             3
(1 row)

SELECT popcountAsm64(30::bit(32));
 popcountasm64 
---------------
             4
(1 row)

SELECT popcountAsm64(127::bit(32));
 popcountasm64 
---------------
             7
(1 row)

SELECT popcountAsm64(b'10101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010101010101010110101010101010101010101010101010101101010101010101010101010101010101011010101010101010101010');
 popcountasm64 
---------------
           263
(1 row)

SELECT sum(popcountAsm64(x::bit(512))) from generate_series(1,1000000) x;
   sum   
---------
 9884999
(1 row)

SELECT sum(popcountAsm64(x::bit(500))) from generate_series(1,1000000) x;
   sum   
---------
 9884999
(1 row)