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[/] [nfcc/] [trunk/] [rijndael/] [invcipher/] [xtime_4.vhdl] - Rev 2
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-- ------------------------------------------------------------------------ -- Copyright (C) 2010 Arif Endro Nugroho -- All rights reserved. -- -- Redistribution and use in source and binary forms, with or without -- modification, are permitted provided that the following conditions -- are met: -- -- 1. Redistributions of source code must retain the above copyright -- notice, this list of conditions and the following disclaimer. -- 2. Redistributions in binary form must reproduce the above copyright -- notice, this list of conditions and the following disclaimer in the -- documentation and/or other materials provided with the distribution. -- -- THIS SOFTWARE IS PROVIDED BY ARIF ENDRO NUGROHO "AS IS" AND ANY EXPRESS -- OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED -- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE -- DISCLAIMED. IN NO EVENT SHALL ARIF ENDRO NUGROHO BE LIABLE FOR ANY -- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL -- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS -- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) -- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, -- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -- POSSIBILITY OF SUCH DAMAGE. -- -- End Of License. -- ------------------------------------------------------------------------ library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity xtime_4 is port ( x4i : in bit_vector (07 downto 00); x4o : out bit_vector (07 downto 00) ); end xtime_4; architecture phy of xtime_4 is begin x4o <= ( x4i(05) & x4i(04) & ( x4i(03) xor x4i(07) ) & ( x4i(02) xor x4i(07) xor x4i(06) ) & ( x4i(01) xor x4i(06) ) & ( x4i(00) xor x4i(07) ) & ( x4i(07) xor x4i(06) ) & x4i(06) ); end phy;