diff options
Diffstat (limited to 'testsuite/vests/vhdl-93/ashenden/compliant/ch_05_tb_05_10.vhd')
-rw-r--r-- | testsuite/vests/vhdl-93/ashenden/compliant/ch_05_tb_05_10.vhd | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_05_tb_05_10.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_05_tb_05_10.vhd new file mode 100644 index 000000000..9a82004dc --- /dev/null +++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_05_tb_05_10.vhd @@ -0,0 +1,72 @@ + +-- Copyright (C) 1996 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 + +-- --------------------------------------------------------------------- +-- +-- $Id: ch_05_tb_05_10.vhd,v 1.1.1.1 2001-08-22 18:20:48 paw Exp $ +-- $Revision: 1.1.1.1 $ +-- +-- --------------------------------------------------------------------- + +entity add_1 is + port ( d0, d1, d2, d3 : in bit; + y0, y1, y2, y3 : out bit ); +end entity add_1; + + +architecture boolean_eqn of add_1 is +begin + + y0 <= not d0 after 4 ns; + + y1 <= (not d1 and d0) + or (d1 and not d0) after 4 ns; + + y2 <= (not d2 and d1 and d0) + or (d2 and not (d1 and d0)) after 4 ns; + + y3 <= (not d3 and d2 and d1 and d0) + or (d3 and not (d2 and d1 and d0)) after 4 ns; + +end architecture boolean_eqn; + + +entity buf4 is + port ( a0, a1, a2, a3 : in bit; + y0, y1, y2, y3 : out bit ); +end entity buf4; + + +architecture basic of buf4 is +begin + + y0 <= a0 after 2 ns; + y1 <= a1 after 2 ns; + y2 <= a2 after 2 ns; + y3 <= a3 after 2 ns; + +end architecture basic; + + +package counter_types is + + subtype digit is bit_vector(3 downto 0); + +end package counter_types; + |