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  • This comparison shows the changes necessary to convert path
    /mod_sim_exp/trunk/rtl/vhdl/core
    from Rev 55 to Rev 59
    Reverse comparison

Rev 55 → Rev 59

/std_functions.vhd
0,0 → 1,81
----------------------------------------------------------------------
---- std_functions ----
---- ----
---- This file is part of the ----
---- Modular Simultaneous Exponentiation Core project ----
---- http://www.opencores.org/cores/mod_sim_exp/ ----
---- ----
---- Description ----
---- package with standard functions used in this project ----
---- ----
---- Authors: ----
---- - Geoffrey Ottoy, DraMCo research group ----
---- - Jonas De Craene, JonasDC@opencores.org ----
---- ----
----------------------------------------------------------------------
---- ----
---- Copyright (C) 2011 DraMCo research group and OPENCORES.ORG ----
---- ----
---- This source file may be used and distributed without ----
---- restriction provided that this copyright statement is not ----
---- removed from the file and that any derivative work contains ----
---- the original copyright notice and the associated disclaimer. ----
---- ----
---- This source file is free software; you can redistribute it ----
---- and/or modify it under the terms of the GNU Lesser General ----
---- Public License as published by the Free Software Foundation; ----
---- either version 2.1 of the License, or (at your option) any ----
---- later version. ----
---- ----
---- This source is distributed in the hope that it will be ----
---- useful, but WITHOUT ANY WARRANTY; without even the implied ----
---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ----
---- PURPOSE. See the GNU Lesser General Public License for more ----
---- details. ----
---- ----
---- You should have received a copy of the GNU Lesser General ----
---- Public License along with this source; if not, download it ----
---- from http://www.opencores.org/lgpl.shtml ----
---- ----
----------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
 
package std_functions is
function maxV(L, R: INTEGER) return INTEGER;
function minV(L, R: INTEGER) return INTEGER;
function log2 (val: INTEGER) return natural;
end std_functions;
 
package body std_functions is
function maxV(L, R: INTEGER) return INTEGER is
begin
if L > R then
return L;
else
return R;
end if;
end;
 
function minV(L, R: INTEGER) return INTEGER is
begin
if L < R then
return L;
else
return R;
end if;
end;
 
function log2 (val: INTEGER) return natural is
variable res : natural;
begin
for i in 0 to 31 loop
if (val <= (2**i)) then
res := i;
exit;
end if;
end loop;
return res;
end function Log2;
end std_functions;

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