62 lines
1.7 KiB
Coq
62 lines
1.7 KiB
Coq
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//
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// Copyright (c) 2000 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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* This test catches some rather tricky symbol binding issues.
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* Hierarchical binding gets tricky when tasks reach outside their
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* own scope to find things.
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*/
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module glob(fake);
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input fake;
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reg var1;
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reg var2;
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endmodule // glob
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module main;
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/* This task reaches into the U1 module instance to set some
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registers. This is tricky because task definitions are
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elaborated early, probably before the modules are elaborated. */
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task test;
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begin
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U1.var1 = 1'b0;
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U1.var2 = 1'b1;
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end
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endtask // test
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glob U1 (fake);
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initial begin
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test;
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if (U1.var1 !== 1'b0) begin
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$display("FAILED -- globvar1 == %b", U1.var1);
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$finish;
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end
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if (U1.var2 !== 1'b1) begin
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$display("FAILED -- globvar2 == %b", U1.var2);
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$finish;
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end
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$display("PASSED");
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end // initial begin
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endmodule // main
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