iverilog/ivtest/ivltests/event_list.v

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//
// Copyright (c) 2000 Stephen Williams (steve@icarus.com)
//
// 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
//
// Check support for event lists with named events.
//
module main ();
reg flag1, flag2, flag12;
event event_1, event_2;
always @ event_1 flag1 = ~flag1;
always @ event_2 flag2 = ~flag2;
always @(event_1 or event_2) flag12 = ~flag12;
initial begin
flag1 = 0;
flag2 = 0;
flag12 = 0;
#1 -> event_1;
#1
if (flag1 !== 1) begin
$display("FAILED -- event_1 didn't trigger flag1");
$finish;
end
if (flag2 !== 0) begin
$display("FAILED -- event_1 DID trigger flag2");
$finish;
end
if (flag12 !== 1) begin
$display("FAILED -- event_1 didn't trigger flag12");
$finish;
end
flag1 = 0;
flag2 = 0;
flag12 = 0;
#1 -> event_2;
#1
if (flag1 !== 0) begin
$display("FAILED -- event_2 DID trigger flag1");
$finish;
end
if (flag2 !== 1) begin
$display("FAILED -- event_2 didn't trigger flag2");
$finish;
end
if (flag12 !== 1) begin
$display("FAILED -- event_1 didn't trigger flag12");
$finish;
end
$display("PASSED");
end
endmodule