49 lines
1.4 KiB
Coq
49 lines
1.4 KiB
Coq
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`begin_keywords "1364-2005"
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/*
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* Copyright (c) 2005 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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/* andnot1.v
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* This tests types.
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*/
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module main;
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reg a, b, c;
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wire d = a & !b; // change from !b to ~b and everything is fine
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reg [2:0] tmp;
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reg ref;
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initial begin
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// Do an exaustive scan of the possible values.
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for (tmp = 0 ; tmp < 4 ; tmp = tmp + 1) begin
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a = tmp[0];
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b = tmp[1];
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c = a & ~b;
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#1 if (c != d) begin
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$display("FAILED -- a=%b, b=%b, c=%b, d=%b",
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a, b, c, d);
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$finish;
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end
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end // for (tmp = 0 ; tmp < 4 ; tmp = tmp + 1)
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$display("PASSED");
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end
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endmodule // main
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`end_keywords
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