diff options
Diffstat (limited to 'testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_20.vhd')
-rw-r--r-- | testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_20.vhd | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_20.vhd b/testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_20.vhd new file mode 100644 index 000000000..18e9e4c75 --- /dev/null +++ b/testsuite/vests/vhdl-93/ashenden/compliant/ch_13_fg_13_20.vhd @@ -0,0 +1,99 @@ + +-- 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_13_fg_13_20.vhd,v 1.2 2001-10-26 16:29:35 paw Exp $ +-- $Revision: 1.2 $ +-- +-- --------------------------------------------------------------------- + +-- not in book + +library ieee; use ieee.std_logic_1164.all; + + entity control_section is + end entity control_section; + +-- end not in book + + + architecture structural of control_section is + + component reg is + generic ( width : positive ); + port ( clk : in std_logic; + d : in std_logic_vector(0 to width - 1); + q : out std_logic_vector(0 to width - 1) ); + end component reg; + + for flag_reg : reg + use entity work.reg(gate_level) + -- workaround for MTI bug mt023 + -- port map ( clock => clk, data_in => d, data_out => q ); + port map ( clock => clk, data_in => d, data_out => q, reset_n => '1' ); + -- end workaround + + -- . . . + + -- not in book + signal clock_phase1, zero_result, neg_result, overflow_result, + zero_flag, neg_flag, overflow_flag : std_logic; + -- end not in book + + begin + + flag_reg : component reg + generic map ( width => 3 ) + port map ( clk => clock_phase1, + d(0) => zero_result, d(1) => neg_result, + d(2) => overflow_result, + q(0) => zero_flag, q(1) => neg_flag, + q(2) => overflow_flag ); + + -- . . . + + -- not in book + + stimulus : process is + begin + clock_phase1 <= '0'; + zero_result <= '0'; neg_result <= '0'; overflow_result <= '0'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '0'; neg_result <= '0'; overflow_result <= '1'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '0'; neg_result <= '1'; overflow_result <= '0'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '0'; neg_result <= '1'; overflow_result <= '1'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '1'; neg_result <= '0'; overflow_result <= '0'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '1'; neg_result <= '0'; overflow_result <= '1'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '1'; neg_result <= '1'; overflow_result <= '0'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + zero_result <= '1'; neg_result <= '1'; overflow_result <= '1'; wait for 10 ns; + clock_phase1 <= '1', '0' after 5 ns; wait for 10 ns; + + wait; + end process stimulus; + + -- end not in book + + end architecture structural; |