Subversion Repositories xmatchpro

--This library is free software; you can redistribute it and/or

--modify it under the terms of the GNU Lesser General Public

--License as published by the Free Software Foundation; either

--version 2.1 of the License, or (at your option) any later version.

--This library is distributed in the hope that it will be useful,

--but WITHOUT ANY WARRANTY; without even the implied warranty of

--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

--Lesser General Public License for more details.

--You should have received a copy of the GNU Lesser General Public

--License along with this library; if not, write to the Free Software

--Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

-- e_mail : j.l.nunez-yanez@byacom.co.uk

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

--  ENTITY       = MG_LOGIC    --

--  version      = 1.0         --

--  last update  = 11/02/98    --

--  author       = Jose Nunez  --

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

-- FUNCTION

-- Movement generation logic.

-- This generates the required MOVE control bus according to the hit location

-- and whether or not a full hit has occurred.

--  PIN LIST

--  MATCH_LOC   = input match location (at most 1 bit is low, indicating

--                 the match location).

--  FULL_HIT    = input signal indicating that a full hit has occurred

--                 (active low).

--  MOVE        = output bus to control movement of data in the CAM array.

library ieee,dzx;

use ieee.std_logic_1164.all;

use dzx.attributes.all;

entity MG_LOGIC_2 is

port

(

      MATCH_LOC : in bit_vector(15 downto 0) ;

      FULL_HIT : in bit ;

      MOVE : out bit_vector(15 downto 0)

);

end MG_LOGIC_2;

architecture MOVE_2 of MG_LOGIC_2 is

-- signal TEMP_MOVE : bit_vector(127 downto 0);

begin

ENABLE : process (FULL_HIT,MATCH_LOC)

variable MOVE_TEMP: bit_vector(15 downto 0);

begin

if (FULL_HIT = '1') then

                MOVE_TEMP := "0000000000000000";

else

                MOVE_TEMP := MATCH_LOC;

end if;

for I in 0 to 15 loop

        MOVE(15-I) <= MOVE_TEMP(I);

end loop;

end process ENABLE;

end MOVE_2;