iverilog/ivtest/ivltests/shift_pad.v

43 lines
1.2 KiB
Verilog

/*
* 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
*/
module main;
reg [1:0] out;
reg in;
initial begin
in = 1;
out = in << 1;
if (out !== 2'b10) begin
$display("FAILED (1) -- out == %b", out);
$finish;
end
out <= in << 1;
#1 if (out !== 2'b10) begin
$display("FAILED (2) -- out == %b", out);
$finish;
end
$display("PASSED");
end // initial begin
endmodule // main