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-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
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-- This file is part of VESTs (Vhdl tESTs).
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-- VESTs is free software; you can redistribute it and/or modify it
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-- under the terms of the GNU General Public License as published by the
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-- Free Software Foundation; either version 2 of the License, or (at
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-- your option) any later version. 
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-- VESTs is distributed in the hope that it will be useful, but WITHOUT
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-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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-- for more details. 
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-- You should have received a copy of the GNU General Public License
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-- along with VESTs; if not, write to the Free Software Foundation,
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-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
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-- ---------------------------------------------------------------------
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--
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-- $Id: ch_03_fg_03_06.vhd,v 1.2 2001-10-26 16:29:33 paw Exp $
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-- $Revision: 1.2 $
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--
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-- ---------------------------------------------------------------------
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architecture fixed_length_series of cos is
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begin
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  summation : process (theta) is
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                                variable sum, term : real;
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  begin
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    sum := 1.0;
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    term := 1.0;
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    for n in 1 to 9 loop
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      term := (-term) * theta**2 / real(((2*n-1) * 2*n));
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      sum := sum + term;
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    end loop;
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    result <= sum;
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  end process summation;
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end architecture fixed_length_series;
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