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[/] [xmatchpro/] [trunk/] [xmw4-comdec/] [src/] [mg_logic_2.vhd] - Blame information for rev 9

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1 8 eejlny
--This library is free software; you can redistribute it and/or
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--modify it under the terms of the GNU Lesser General Public
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--License as published by the Free Software Foundation; either
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--version 2.1 of the License, or (at your option) any later version.
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--This library is distributed in the hope that it will be useful,
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--but WITHOUT ANY WARRANTY; without even the implied warranty of
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--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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--Lesser General Public License for more details.
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--You should have received a copy of the GNU Lesser General Public
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--License along with this library; if not, write to the Free Software
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--Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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-- e_mail : j.l.nunez-yanez@byacom.co.uk
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---------------------------------
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--  ENTITY       = MG_LOGIC    --
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--  version      = 1.0         --
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--  last update  = 11/02/98    --
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--  author       = Jose Nunez  --
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---------------------------------
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-- FUNCTION
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-- Movement generation logic.
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-- This generates the required MOVE control bus according to the hit location
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-- and whether or not a full hit has occurred.
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--  PIN LIST
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--  MATCH_LOC   = input match location (at most 1 bit is low, indicating
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--                 the match location).
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--  FULL_HIT    = input signal indicating that a full hit has occurred
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--                 (active low).
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--  MOVE        = output bus to control movement of data in the CAM array.
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library ieee,dzx;
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use ieee.std_logic_1164.all;
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use dzx.attributes.all;
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entity MG_LOGIC_2 is
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port
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(
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      MATCH_LOC : in bit_vector(15 downto 0) ;
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      FULL_HIT : in bit ;
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      MOVE : out bit_vector(15 downto 0)
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);
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end MG_LOGIC_2;
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architecture MOVE_2 of MG_LOGIC_2 is
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-- signal TEMP_MOVE : bit_vector(127 downto 0);
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begin
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ENABLE : process (FULL_HIT,MATCH_LOC)
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variable MOVE_TEMP: bit_vector(15 downto 0);
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begin
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if (FULL_HIT = '1') then
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                MOVE_TEMP := "0000000000000000";
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else
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                MOVE_TEMP := MATCH_LOC;
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end if;
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for I in 0 to 15 loop
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        MOVE(15-I) <= MOVE_TEMP(I);
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end loop;
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end process ENABLE;
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end MOVE_2;
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