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;