iverilog/ivtest/ivltests/fork3.19A.v

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//
// Copyright (c) 1999 Steven Wilson (stevew@home.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
//
// SDW - Validate fork template 1
module main ;
reg [3:0] value1,value2 ;
reg [3:0] ret1,ret2 ;
reg error;
always @(value1 or value2)
begin
fork
#10 ret1 = value1;
#22 ret2 = value2;
join
end
initial
begin
error = 0;
#1 ;
value1 = 1;
value2 = 2;
ret1 = 0;
ret2 = 0;
#12;
if(ret1 !== 1)
begin
$display("FAILED - force3.19A first statement didn't execute(1)");
error = 1;
end
if(ret2 !== 0)
begin
$display("FAILED - force3.19A second stmt executed? is %d sb %d",
1'b0,ret2);
error = 1;
end
#10;
if(ret1 !== 1)
begin
$display("FAILED -fork3.19A First statement problem sb 1, is %d",ret1);
error = 1;
end
if(ret2 !== 2)
begin
$display("FAILED -fork3.19A First statement problem sb 2, is %d",ret1);
error = 1;
end
if(error == 0)
$display("PASSED");
end
endmodule