iverilog/ivtest/ivltests/ldelay2.v

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/*
* Copyright (c) 2001 Stephan Boettcher <stephan@nevis.columbia.edu>
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form 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.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
// $Id: ldelay2.v,v 1.2 2007/12/06 02:31:10 stevewilliams Exp $
// Test for delays in structural logic. Inertial delays suppress event.
module test;
wire q;
reg a, b;
xor #1 (q, a, b);
reg error;
initial
begin
error = 0;
#2;
@(q);
error = 1;
$display("%0d: FAILED: q=%b", $time, q);
end
initial
begin
// $dumpvars;
a = 0;
b = 1;
#3;
a = 1;
b = 0;
#2;
a = 0;
b = 1;
#3;
if (!error)
$display("PASSED");
end
endmodule