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JonasDC |
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---- std_functions ----
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---- ----
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---- This file is part of the ----
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---- Modular Simultaneous Exponentiation Core project ----
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---- http://www.opencores.org/cores/mod_sim_exp/ ----
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---- ----
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---- Description ----
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---- package with standard functions used in this project ----
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---- ----
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---- Authors: ----
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---- - Geoffrey Ottoy, DraMCo research group ----
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---- - Jonas De Craene, JonasDC@opencores.org ----
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---- ----
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----------------------------------------------------------------------
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---- ----
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---- Copyright (C) 2011 DraMCo research group and OPENCORES.ORG ----
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---- ----
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---- This source file may be used and distributed without ----
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---- restriction provided that this copyright statement is not ----
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---- removed from the file and that any derivative work contains ----
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---- the original copyright notice and the associated disclaimer. ----
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---- ----
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---- This source file is free software; you can redistribute it ----
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---- and/or modify it under the terms of the GNU Lesser General ----
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---- Public License as published by the Free Software Foundation; ----
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---- either version 2.1 of the License, or (at your option) any ----
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---- later version. ----
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---- ----
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---- This source is distributed in the hope that it will be ----
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---- useful, but WITHOUT ANY WARRANTY; without even the implied ----
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---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ----
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---- PURPOSE. See the GNU Lesser General Public License for more ----
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---- details. ----
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---- ----
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---- You should have received a copy of the GNU Lesser General ----
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---- Public License along with this source; if not, download it ----
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---- from http://www.opencores.org/lgpl.shtml ----
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---- ----
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----------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_unsigned.all;
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package std_functions is
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function maxV(L, R: INTEGER) return INTEGER;
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function minV(L, R: INTEGER) return INTEGER;
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function log2 (val: INTEGER) return natural;
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end std_functions;
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package body std_functions is
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function maxV(L, R: INTEGER) return INTEGER is
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begin
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if L > R then
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return L;
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else
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return R;
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end if;
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end;
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function minV(L, R: INTEGER) return INTEGER is
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begin
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if L < R then
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return L;
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else
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return R;
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end if;
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end;
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function log2 (val: INTEGER) return natural is
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variable res : natural;
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begin
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for i in 0 to 31 loop
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if (val <= (2**i)) then
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res := i;
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exit;
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end if;
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end loop;
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return res;
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end function Log2;
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end std_functions;
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