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 deassign reg_ident;
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module main ;
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reg [31:0] value;
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reg [1:0] control;
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reg clock;
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reg error;
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always @(posedge clock)
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value = 3;
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always @(control)
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if(control == 1)
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assign value = 1;
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else
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if(control == 2)
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assign value = 2;
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else
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deassign value ;
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// Setup a clock generator.
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always begin
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#2;
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clock = ~clock;
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end
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initial
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begin
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clock = 0;
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error = 0;
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# 3;
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if(value != 3)
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begin
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$display("FAILED - deassign3.4A - procedural assignment(1)");
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error = 1;
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end
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# 2;
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control = 1;
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# 1;
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if(value != 1)
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begin
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$display("FAILED - deassign3.4A - procedural assignment(2)");
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error = 1;
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end
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# 1 ;
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control = 2;
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# 1 ;
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if(value != 2)
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begin
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$display("FAILED - deassign3.4A - procedural assignment(3)");
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error = 1;
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end
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#1 ;
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control = 0;
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# 10;
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if(value != 3)
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begin
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$display("FAILED - deassign3.4A - procedural assignment(4)");
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error = 1;
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end
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if(error == 0) $display ("PASSED");
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$finish ;
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end
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endmodule
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