-- Xilinx VHDL produced by program ngd2vhdl, Version M1.4.12-- Date: Tue Jan  6 17:23:35 1998-- Design file: time_sim.nga-- Device: 4005epc84-2----- CELL TOC ------- Model for  Tristate-On-Configuration Celllibrary IEEE;use IEEE.std_logic_1164.all;use IEEE.VITAL_Timing.all;entity TOC is    generic ( InstancePath: STRING := "*");    port( O : out std_ulogic := '0' ) ;    attribute VITAL_LEVEL0 of TOC : entity is TRUE ;end TOC ;architecture TOC_V of TOC isattribute VITAL_LEVEL0 of TOC_V : architecture is TRUE ;begin    ONE_SHOT: process    begin      wait;    end process ONE_SHOT ;end TOC_V ;configuration CFG_TOC_V of TOC is    for TOC_V    end for ;end CFG_TOC_V ;library IEEE;use IEEE.STD_LOGIC_1164.ALL;library SIMPRIM;use SIMPRIM.VCOMPONENTS.ALL;use SIMPRIM.VPACKAGE.ALL;entity CASE_EX is  port (    A : in STD_LOGIC := 'X' ;    B : in STD_LOGIC := 'X' ;    C : in STD_LOGIC := 'X' ;    D : in STD_LOGIC := 'X' ;    MUX_OUT : out STD_LOGIC ;    SEL : in  STD_LOGIC_VECTOR ( 1 downto 0 )  ) ;end CASE_EX ;architecture STRUCTURE of CASE_EX is  component TOC       port ( O : out STD_ULOGIC ) ;  end component ;  signal N23 , N24 , N25 , N26 , N27 , N28 , N61 , N59 , N60 , N53 , N55 , N54   , N56 , N57 , N58 , U46_1I20_GTS_TRI , U51_2_0 , U55_2_0 , U49_2_INV ,   U53_2_INV , U54_2_INV , U55_N59_2_INV , U46_1I20_GTS_TRI_2_INV , GTS   : STD_LOGIC ;  begin    U40 : X_BUF       port map ( I => SEL(1) , O => N23 ) ;    U41 : X_BUF       port map ( I => SEL(0) , O => N24 ) ;    U42 : X_BUF       port map ( I => A , O => N25 ) ;    U43 : X_BUF       port map ( I => B , O => N26 ) ;    U44 : X_BUF       port map ( I => C , O => N27 ) ;    U45 : X_BUF       port map ( I => D , O => N28 ) ;    U47 : X_OR2       port map ( I0 => N59 , I1 => N60 , O => N61 ) ;    U48 : X_INV       port map ( I => N28 , O => N53 ) ;    U49 : X_AND2       port map ( I0 => N24 , I1 => N53 , O => U49_2_INV ) ;    U50 : X_OR2       port map ( I0 => N27 , I1 => N24 , O => N54 ) ;    U52 : X_INV       port map ( I => N24 , O => N56 ) ;    U53 : X_OR2       port map ( I0 => N56 , I1 => N26 , O => U53_2_INV ) ;    U54 : X_OR2       port map ( I0 => N25 , I1 => N24 , O => U54_2_INV ) ;    U46_1I20 : X_BUF       port map ( I => N61 , O => U46_1I20_GTS_TRI ) ;    U46_1I20_GTS_TRI_0 : X_TRI       port map ( I => U46_1I20_GTS_TRI , O => MUX_OUT ,       CTL => U46_1I20_GTS_TRI_2_INV ) ;    U51_N60_2_0 : X_AND2       port map ( I0 => N55 , I1 => N54 , O => U51_2_0 ) ;    U51_N60 : X_AND2       port map ( I0 => U51_2_0 , I1 => N23 , O => N60 ) ;    U55_N59_2_0 : X_OR2       port map ( I0 => N23 , I1 => N58 , O => U55_2_0 ) ;    U55_N59 : X_OR2       port map ( I0 => U55_2_0 , I1 => N57 , O => U55_N59_2_INV ) ;    U49_2_INV_1 : X_INV       port map ( I => U49_2_INV , O => N55 ) ;    U53_2_INV_2 : X_INV       port map ( I => U53_2_INV , O => N57 ) ;    U54_2_INV_3 : X_INV       port map ( I => U54_2_INV , O => N58 ) ;    U55_N59_2_INV_4 : X_INV       port map ( I => U55_N59_2_INV , O => N59 ) ;    U46_1I20_GTS_TRI_2_INV_5 : X_INV       port map ( I => GTS , O => U46_1I20_GTS_TRI_2_INV ) ;    TOC_NGD2VHDL : TOC       port map ( O => GTS ) ;end STRUCTURE ;