80 lines
2.2 KiB
Verilog
80 lines
2.2 KiB
Verilog
/*
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* Copyright (c) 2003 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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* Icarus Verilog declares that $realtobits shall return a 64bit
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* number that is the normalized IEEE754 encoding of the real value.
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* Whatever it takes to get that, it does. It should be easy in
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* general, as most modern processors think in IEEE754 floating point
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* anyhow.
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*/
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module main;
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real val;
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initial begin
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val = 0.0;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h0000000000000000) begin
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$display("FAILED");
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$finish;
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end
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val = 1.0;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h3ff0000000000000) begin
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$display("FAILED");
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$finish;
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end
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val = 0.5;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h3fe0000000000000) begin
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$display("FAILED");
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$finish;
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end
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val = 1.5;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h3ff8000000000000) begin
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$display("FAILED");
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$finish;
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end
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val = 1.125;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h3ff2000000000000) begin
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$display("FAILED");
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$finish;
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end
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val = 2.6;
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$display("val=%f (%h)", val, $realtobits(val));
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if ($realtobits(val) !== 64'h4004cccccccccccd) begin
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$display("FAILED");
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$finish;
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end
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$display("PASSED");
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end
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endmodule // main
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