Import vests testsuite

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diff --git a/testsuite/vests/vhdl-ams/ashenden/compliant/sequential-statements/tb_mux4.vhd b/testsuite/vests/vhdl-ams/ashenden/compliant/sequential-statements/tb_mux4.vhd
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+
+-- Copyright (C) 2002 Morgan Kaufmann Publishers, Inc
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs 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 General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+entity tb_mux4 is
+
+end entity tb_mux4;
+
+
+----------------------------------------------------------------
+
+
+library ieee;  use ieee.std_logic_1164.all;
+
+
+architecture test_demo of tb_mux4 is
+
+  signal sel : work.mux4_types.sel_range := 0;
+  signal d0, d1, d2, d3, z : std_ulogic;
+
+begin
+
+  dut : entity work.mux4(demo)
+    port map ( sel => sel,
+               d0 => d0, d1 => d1, d2 => d2, d3 => d3,
+               z => z );
+
+  stimulus : process is
+  begin
+    wait for 5 ns;
+    d0 <= '1';			wait for 5 ns;
+    d1 <= 'H';			wait for 5 ns;
+    		sel <= 1;	wait for 5 ns;
+    d1 <= 'L';			wait for 5 ns;
+    		sel <= 2;	wait for 5 ns;
+    d0 <= '0';			wait for 5 ns;
+    d2 <= '1';			wait for 5 ns;
+    d2 <= '0';			wait for 5 ns;
+    		sel <= 3;	wait for 5 ns;
+    d3 <= '1';			wait for 5 ns;
+    d3 <= '0';			wait for 5 ns;
+
+    wait;
+  end process stimulus;
+
+end architecture test_demo;