iverilog/ivtest/ivltests/signed9.v

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/*
* Copyright (c) 2003 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 assignsigned();
parameter foo = 10;
reg signed [15:0] bar = -1;
wire baz;
assign baz = (bar < $signed(foo));
initial begin
#1 $display("bar=%h(%0d), foo=%0d, baz = %b", bar, bar, foo, baz);
if (baz !== 1'b1) begin
$display("FAILED -- Compare returns %b instead of 1.", baz);
$finish;
end
$display("PASSED");
end
endmodule