010xxx - math functions
10000 ----- random (math.pvvs)
10001 ----- absolute value (math.pvvs)
+ 10010 ----- greatest common divisor (math.pvvs)
011xxx - heap functions
11000 ----- memset (heap.pvvs)
11001 ----- memcpy (heap.pvvs)
11111 ----- spew (heap.pvvs)
100xxx - string functions
100000 ----- strlen (string.pvvs)
+ 100001 ----- isdigit (string.pvvs)
101xxx - logic functions
101000 ----- not (logic.pvvs)
101001 ----- and (logic.pvvs)