52 lines
1.4 KiB
Coq
52 lines
1.4 KiB
Coq
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/*
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* Copyright (c) 2001 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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* This program tests the magic $signed system function.
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*/
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module main;
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reg [3:0] a;
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initial begin
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a = 4'd12;
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// The expression should not change the bit pattern in any way
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if ($signed(a) !== 4'b1100) begin
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$display("FAILED -- $signed(%b) === %b", a, $signed(a));
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$finish;
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end
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if ($signed(a) == 4) begin
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$display("FAILED -- $signed(%b) == 4", a);
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$finish;
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end
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// The >= should do a signed comparison here.
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if ($signed(a) >= 0) begin
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$display("FAILED -- $signed(%b) > 0", a);
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$finish;
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end
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$display("PASSED");
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end // initial begin
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endmodule
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