library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;

library std;
use std.textio.all;

--------------------------------------------------------------------------------

entity priority_encoder is
  generic (
    SEL_W  : integer := 16;
    CODE_W : integer := 4);
  port (
    sel  : in  std_logic_vector (SEL_W-1 downto 0);
    code : out std_logic_vector (CODE_W-1 downto 0));
end entity priority_encoder;

--------------------------------------------------------------------------------

architecture behavioral of priority_encoder is

--------------------------------------------------------------------------------

begin

  process (sel) is
  begin
    code <= (others => '-');
    
    for i in 0 to SEL_W-1 loop
      if sel(i) = '1' then
        code <= conv_std_logic_vector(i, CODE_W);
      end if;
    end loop;
  end process;
  
end architecture behavioral;