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ghegde |
--************************************************************
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--Copyright 2015, Ganesh Hegde < ghegde@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 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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--*************************************************************
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-- GF multiplication of input byte by 9
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--Logic type : Combinational
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--*************************************************************
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library ieee;
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use ieee.std_logic_1164.all;
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entity x9 is
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port (
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--clk,reset : in std_logic;
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data_in: in std_logic_vector(7 downto 0);
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data_out:out std_logic_vector(7 downto 0)
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);
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end x9;
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architecture beh_x9 of x9 is
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begin
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process(data_in)
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begin
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case(data_in) is
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when x"00"=> data_out<=x"00";
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when x"01"=> data_out<=x"09";
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when x"02"=> data_out<=x"12";
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when x"03"=> data_out<=x"1b";
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when x"04"=> data_out<=x"24";
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when x"05"=> data_out<=x"2d";
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when x"06"=> data_out<=x"36";
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when x"07"=> data_out<=x"3f";
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when x"08"=> data_out<=x"48";
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when x"09"=> data_out<=x"41";
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when x"0a"=> data_out<=x"5a";
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when x"0b"=> data_out<=x"53";
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when x"0c"=> data_out<=x"6c";
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when x"0d"=> data_out<=x"65";
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when x"0e"=> data_out<=x"7e";
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when x"0f"=> data_out<=x"77";
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when x"10"=> data_out<=x"90";
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when x"11"=> data_out<=x"99";
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when x"12"=> data_out<=x"82";
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when x"13"=> data_out<=x"8b";
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when x"14"=> data_out<=x"b4";
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when x"15"=> data_out<=x"bd";
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when x"16"=> data_out<=x"a6";
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when x"17"=> data_out<=x"af";
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when x"18"=> data_out<=x"d8";
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when x"19"=> data_out<=x"d1";
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when x"1a"=> data_out<=x"ca";
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when x"1b"=> data_out<=x"c3";
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when x"1c"=> data_out<=x"fc";
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when x"1d"=> data_out<=x"f5";
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when x"1e"=> data_out<=x"ee";
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when x"1f"=> data_out<=x"e7";
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when x"20"=> data_out<=x"3b";
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when x"21"=> data_out<=x"32";
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when x"22"=> data_out<=x"29";
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when x"23"=> data_out<=x"20";
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when x"24"=> data_out<=x"1f";
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when x"25"=> data_out<=x"16";
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when x"26"=> data_out<=x"0d";
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when x"27"=> data_out<=x"04";
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when x"28"=> data_out<=x"73";
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when x"29"=> data_out<=x"7a";
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when x"2a"=> data_out<=x"61";
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when x"2b"=> data_out<=x"68";
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when x"2c"=> data_out<=x"57";
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when x"2d"=> data_out<=x"5e";
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when x"2e"=> data_out<=x"45";
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when x"2f"=> data_out<=x"4c";
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when x"30"=> data_out<=x"ab";
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when x"31"=> data_out<=x"a2";
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when x"32"=> data_out<=x"b9";
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when x"33"=> data_out<=x"b0";
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when x"34"=> data_out<=x"8f";
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when x"35"=> data_out<=x"86";
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when x"36"=> data_out<=x"9d";
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when x"37"=> data_out<=x"94";
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when x"38"=> data_out<=x"e3";
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when x"39"=> data_out<=x"ea";
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when x"3a"=> data_out<=x"f1";
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when x"3b"=> data_out<=x"f8";
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when x"3c"=> data_out<=x"c7";
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when x"3d"=> data_out<=x"ce";
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when x"3e"=> data_out<=x"d5";
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when x"3f"=> data_out<=x"dc";
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when x"40"=> data_out<=x"76";
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when x"41"=> data_out<=x"7f";
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when x"42"=> data_out<=x"64";
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when x"43"=> data_out<=x"6d";
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when x"44"=> data_out<=x"52";
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when x"45"=> data_out<=x"5b";
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when x"46"=> data_out<=x"40";
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when x"47"=> data_out<=x"49";
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when x"48"=> data_out<=x"3e";
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when x"49"=> data_out<=x"37";
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when x"4a"=> data_out<=x"2c";
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when x"4b"=> data_out<=x"25";
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when x"4c"=> data_out<=x"1a";
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when x"4d"=> data_out<=x"13";
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when x"4e"=> data_out<=x"08";
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when x"4f"=> data_out<=x"01";
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when x"50"=> data_out<=x"e6";
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when x"51"=> data_out<=x"ef";
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when x"52"=> data_out<=x"f4";
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when x"53"=> data_out<=x"fd";
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when x"54"=> data_out<=x"c2";
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when x"55"=> data_out<=x"cb";
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when x"56"=> data_out<=x"d0";
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when x"57"=> data_out<=x"d9";
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when x"58"=> data_out<=x"ae";
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when x"59"=> data_out<=x"a7";
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when x"5a"=> data_out<=x"bc";
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when x"5b"=> data_out<=x"b5";
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when x"5c"=> data_out<=x"8a";
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when x"5d"=> data_out<=x"83";
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when x"5e"=> data_out<=x"98";
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when x"5f"=> data_out<=x"91";
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when x"60"=> data_out<=x"4d";
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when x"61"=> data_out<=x"44";
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when x"62"=> data_out<=x"5f";
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when x"63"=> data_out<=x"56";
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when x"64"=> data_out<=x"69";
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when x"65"=> data_out<=x"60";
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when x"66"=> data_out<=x"7b";
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when x"67"=> data_out<=x"72";
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when x"68"=> data_out<=x"05";
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when x"69"=> data_out<=x"0c";
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when x"6a"=> data_out<=x"17";
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when x"6b"=> data_out<=x"1e";
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when x"6c"=> data_out<=x"21";
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when x"6d"=> data_out<=x"28";
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when x"6e"=> data_out<=x"33";
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when x"6f"=> data_out<=x"3a";
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when x"70"=> data_out<=x"dd";
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when x"71"=> data_out<=x"d4";
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when x"72"=> data_out<=x"cf";
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when x"73"=> data_out<=x"c6";
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when x"74"=> data_out<=x"f9";
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when x"75"=> data_out<=x"f0";
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when x"76"=> data_out<=x"eb";
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when x"77"=> data_out<=x"e2";
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when x"78"=> data_out<=x"95";
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when x"79"=> data_out<=x"9c";
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when x"7a"=> data_out<=x"87";
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when x"7b"=> data_out<=x"8e";
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when x"7c"=> data_out<=x"b1";
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when x"7d"=> data_out<=x"b8";
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when x"7e"=> data_out<=x"a3";
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when x"7f"=> data_out<=x"aa";
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when x"80"=> data_out<=x"ec";
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when x"81"=> data_out<=x"e5";
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when x"82"=> data_out<=x"fe";
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when x"83"=> data_out<=x"f7";
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when x"84"=> data_out<=x"c8";
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when x"85"=> data_out<=x"c1";
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when x"86"=> data_out<=x"da";
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when x"87"=> data_out<=x"d3";
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when x"88"=> data_out<=x"a4";
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when x"89"=> data_out<=x"ad";
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when x"8a"=> data_out<=x"b6";
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when x"8b"=> data_out<=x"bf";
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when x"8c"=> data_out<=x"80";
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when x"8d"=> data_out<=x"89";
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when x"8e"=> data_out<=x"92";
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when x"8f"=> data_out<=x"9b";
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when x"90"=> data_out<=x"7c";
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when x"91"=> data_out<=x"75";
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when x"92"=> data_out<=x"6e";
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when x"93"=> data_out<=x"67";
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when x"94"=> data_out<=x"58";
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when x"95"=> data_out<=x"51";
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when x"96"=> data_out<=x"4a";
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when x"97"=> data_out<=x"43";
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when x"98"=> data_out<=x"34";
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when x"99"=> data_out<=x"3d";
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when x"9a"=> data_out<=x"26";
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when x"9b"=> data_out<=x"2f";
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when x"9c"=> data_out<=x"10";
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when x"9d"=> data_out<=x"19";
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when x"9e"=> data_out<=x"02";
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when x"9f"=> data_out<=x"0b";
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when x"a0"=> data_out<=x"d7";
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when x"a1"=> data_out<=x"de";
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when x"a2"=> data_out<=x"c5";
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when x"a3"=> data_out<=x"cc";
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when x"a4"=> data_out<=x"f3";
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when x"a5"=> data_out<=x"fa";
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when x"a6"=> data_out<=x"e1";
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when x"a7"=> data_out<=x"e8";
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when x"a8"=> data_out<=x"9f";
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when x"a9"=> data_out<=x"96";
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when x"aa"=> data_out<=x"8d";
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when x"ab"=> data_out<=x"84";
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when x"ac"=> data_out<=x"bb";
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when x"ad"=> data_out<=x"b2";
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when x"ae"=> data_out<=x"a9";
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when x"af"=> data_out<=x"a0";
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when x"b0"=> data_out<=x"47";
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when x"b1"=> data_out<=x"4e";
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when x"b2"=> data_out<=x"55";
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when x"b3"=> data_out<=x"5c";
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when x"b4"=> data_out<=x"63";
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when x"b5"=> data_out<=x"6a";
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| 224 |
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when x"b6"=> data_out<=x"71";
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| 225 |
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when x"b7"=> data_out<=x"78";
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| 226 |
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when x"b8"=> data_out<=x"0f";
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| 227 |
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when x"b9"=> data_out<=x"06";
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| 228 |
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when x"ba"=> data_out<=x"1d";
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when x"bb"=> data_out<=x"14";
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when x"bc"=> data_out<=x"2b";
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when x"bd"=> data_out<=x"22";
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when x"be"=> data_out<=x"39";
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| 233 |
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when x"bf"=> data_out<=x"30";
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| 234 |
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when x"c0"=> data_out<=x"9a";
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| 235 |
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when x"c1"=> data_out<=x"93";
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| 236 |
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when x"c2"=> data_out<=x"88";
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| 237 |
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when x"c3"=> data_out<=x"81";
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| 238 |
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when x"c4"=> data_out<=x"be";
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when x"c5"=> data_out<=x"b7";
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| 240 |
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when x"c6"=> data_out<=x"ac";
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| 241 |
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when x"c7"=> data_out<=x"a5";
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| 242 |
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when x"c8"=> data_out<=x"d2";
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| 243 |
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when x"c9"=> data_out<=x"db";
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| 244 |
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when x"ca"=> data_out<=x"c0";
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| 245 |
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when x"cb"=> data_out<=x"c9";
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| 246 |
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when x"cc"=> data_out<=x"f6";
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| 247 |
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when x"cd"=> data_out<=x"ff";
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| 248 |
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when x"ce"=> data_out<=x"e4";
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| 249 |
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when x"cf"=> data_out<=x"ed";
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| 250 |
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when x"d0"=> data_out<=x"0a";
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| 251 |
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when x"d1"=> data_out<=x"03";
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| 252 |
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when x"d2"=> data_out<=x"18";
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| 253 |
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when x"d3"=> data_out<=x"11";
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when x"d4"=> data_out<=x"2e";
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when x"d5"=> data_out<=x"27";
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when x"d6"=> data_out<=x"3c";
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when x"d7"=> data_out<=x"35";
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when x"d8"=> data_out<=x"42";
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| 259 |
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when x"d9"=> data_out<=x"4b";
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| 260 |
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when x"da"=> data_out<=x"50";
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| 261 |
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when x"db"=> data_out<=x"59";
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| 262 |
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when x"dc"=> data_out<=x"66";
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| 263 |
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when x"dd"=> data_out<=x"6f";
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| 264 |
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when x"de"=> data_out<=x"74";
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| 265 |
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when x"df"=> data_out<=x"7d";
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when x"e0"=> data_out<=x"a1";
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| 267 |
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when x"e1"=> data_out<=x"a8";
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| 268 |
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when x"e2"=> data_out<=x"b3";
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| 269 |
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when x"e3"=> data_out<=x"ba";
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| 270 |
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when x"e4"=> data_out<=x"85";
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| 271 |
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when x"e5"=> data_out<=x"8c";
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| 272 |
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when x"e6"=> data_out<=x"97";
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| 273 |
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when x"e7"=> data_out<=x"9e";
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| 274 |
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when x"e8"=> data_out<=x"e9";
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| 275 |
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when x"e9"=> data_out<=x"e0";
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| 276 |
|
|
when x"ea"=> data_out<=x"fb";
|
| 277 |
|
|
when x"eb"=> data_out<=x"f2";
|
| 278 |
|
|
when x"ec"=> data_out<=x"cd";
|
| 279 |
|
|
when x"ed"=> data_out<=x"c4";
|
| 280 |
|
|
when x"ee"=> data_out<=x"df";
|
| 281 |
|
|
when x"ef"=> data_out<=x"d6";
|
| 282 |
|
|
when x"f0"=> data_out<=x"31";
|
| 283 |
|
|
when x"f1"=> data_out<=x"38";
|
| 284 |
|
|
when x"f2"=> data_out<=x"23";
|
| 285 |
|
|
when x"f3"=> data_out<=x"2a";
|
| 286 |
|
|
when x"f4"=> data_out<=x"15";
|
| 287 |
|
|
when x"f5"=> data_out<=x"1c";
|
| 288 |
|
|
when x"f6"=> data_out<=x"07";
|
| 289 |
|
|
when x"f7"=> data_out<=x"0e";
|
| 290 |
|
|
when x"f8"=> data_out<=x"79";
|
| 291 |
|
|
when x"f9"=> data_out<=x"70";
|
| 292 |
|
|
when x"fa"=> data_out<=x"6b";
|
| 293 |
|
|
when x"fb"=> data_out<=x"62";
|
| 294 |
|
|
when x"fc"=> data_out<=x"5d";
|
| 295 |
|
|
when x"fd"=> data_out<=x"54";
|
| 296 |
|
|
when x"fe"=> data_out<=x"4f";
|
| 297 |
|
|
when others=> data_out<=x"46";
|
| 298 |
|
|
|
| 299 |
|
|
end case;
|
| 300 |
|
|
end process;
|
| 301 |
|
|
|
| 302 |
|
|
end beh_x9;
|
