library ieee;
use ieee.std_logic_1164.all;

package bpac is 
function max (a,b: std_logic_vector)
         return std_logic_vector;
end bpac;
PACKAGE body bpac IS
     function max (a,b: std_logic_vector)
               return std_logic_vector is
  begin

   if(a>b)THEN
       return a;
   ELSE
       return b;

   END IF;
       end max;
   end bpac;