56 lines
1.6 KiB
Coq
56 lines
1.6 KiB
Coq
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/*
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* Copyright (c) 2003 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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/*
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* test the signedness of wires.
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*/
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module main;
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reg signed [7:0] val_rs = -5;
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wire [7:0] val_w = val_rs + 1;
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wire signed [7:0] val_ws = val_rs + 1;
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initial begin
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#1 /* Let assignments settle. */
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$display("val_w=%d, val_ws=%d", val_w, val_ws);
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if (val_w !== 8'd252) begin
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$display("FAILED -- val_w is wrong: %b", val_w);
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$finish;
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end
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if (val_ws !== -8'sd4) begin
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$display("FAILED == val_ws is wrong: %b", val_ws);
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$finish;
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end
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if (val_ws > 0) begin
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$display("FAILED -- signed test of val_ws failed");
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$finish;
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end
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if (val_w < 0) begin
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$display("FAILED -- signed test of val_w failed");
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$finish;
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end
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$display("PASSED");
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end
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endmodule // main
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