89 lines
2.1 KiB
Coq
89 lines
2.1 KiB
Coq
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//
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// Copyright (c) 1999 Steven Wilson (stevew@home.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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// SDW - Validate Modulus operator
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module top;
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reg [7:0] a,b;
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wire [7:0] wa,wb;
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reg [7:0] result;
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wire [7:0] wresult;
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reg [15:0] work;
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reg error;
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assign wa = a;
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assign wresult = work % a;
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always @ (work or wa)
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result = work % a;
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initial
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begin
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error = 0;
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/* Try mod div by 0 */
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#1;
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a = 0;
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work = 16'd1235;
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#1;
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if(wresult !== 8'hxx)
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begin
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$display("FAILED - wire 1235 mod 0: wresult = %h",wresult);
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error =1;
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end
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if(result !== 8'hxx)
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begin
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$display("FAILED - reg 1235 mod 0: result = %h",result);
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error =1;
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end
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#1;
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a = 8'd10;
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#1;
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if(wresult !== 8'h05)
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begin
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$display("FAILED - wire 1235 mod 10: wresult = %h",wresult);
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error =1;
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end
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if(result !== 8'h05)
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begin
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$display("FAILED - reg 1235 mod 10: result = %h",result);
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error =1;
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end
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#1;
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a = 8'b0000_x001;
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#1;
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if(wresult !== 8'bxxxx_xxxx)
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begin
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$display("FAILED - wire 1235 mod 10: wresult = %h",wresult);
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error =1;
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end
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if(result !== 8'bxxxx_xxxx)
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begin
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$display("FAILED - reg 1235 mod 10: result = %h",result);
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error =1;
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end
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if(error == 0)
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$display("PASSED");
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end
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endmodule
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