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--This library is free software; you can redistribute it and/or
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--modify it under the terms of the GNU Lesser General Public
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--License as published by the Free Software Foundation; either
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--version 2.1 of the License, or (at your option) any later version.
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--This library is distributed in the hope that it will be useful,
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--but WITHOUT ANY WARRANTY; without even the implied warranty of
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--MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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--Lesser General Public License for more details.
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--You should have received a copy of the GNU Lesser General Public
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--License along with this library; if not, write to the Free Software
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--Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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-- e_mail : j.l.nunez-yanez@byacom.co.uk
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-----------------------------------
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-- ENTITY = OB_ASSEMBLER --
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-- version = 2.0 --
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-- last update = 6/06/01 --
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-- author = Jose Nunez --
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-----------------------------------
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-- FUNCTION
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-- final assembly stage for output compressed data.
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-- PIN LIST
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-- CLK = master clock
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-- CLEAR = asynchronous clear signal (active LOW)
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-- CODE_OLD = current contents of the output code register
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-- LENGTH_OLD = current length of the output code register
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-- CODE_IN = new input code to be added to the current code
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-- LENGTH_IN = length of the input code
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-- COMP = indicates that we are in compression mode (active low)
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-- FLUSH_IN = indicates that we are at the end of compression and thus must flush any
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-- remaining data from the output code register (new input data is no
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-- longer valid)
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-- CODE_NEW = new data for the output code register
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-- LENGTH_NEW = new output code register length
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-- OVERFLOW_LENGTH = new overflow status (active low). Will go active if more than 64 bits
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-- of the new code are valid
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-- OVERFLOW_FLUSH = indicates a flushing overflow (data must go out when flushing )
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-- FLUSH_END = indicates end of flushing operation (active low)
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library ieee,dzx;
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use ieee.std_logic_1164.all;
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use dzx.bit_arith.all;
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use dzx.bit_utils.all;
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entity OB_ASSEMBLER is
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port
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(
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CLK : in bit;
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CLEAR : in bit;
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RESET : in bit;
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CODE_OLD : in bit_vector(97 downto 0);
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LENGTH_OLD : in bit_vector(5 downto 0);
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CODE_IN : in bit_vector(34 downto 0);
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LENGTH_IN : in bit_vector(5 downto 0);
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COMP : in bit;
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FLUSH_IN : in bit;
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OVERFLOW_OLD : in bit;
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CODE_NEW : out bit_vector(97 downto 0);
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LENGTH_NEW : out bit_vector(5 downto 0);
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OVERFLOW_LENGTH : out bit;
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OVERFLOW_FLUSH : out bit;
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SHORT : out bit;
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FLUSH_END : out bit
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);
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end OB_ASSEMBLER;
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architecture ASSEMBLE2 of OB_ASSEMBLER is
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signal FLUSHING_D : bit;
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signal FLUSHING_Q : bit;
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signal EFC_D : bit;
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signal EFC_Q : bit;
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signal LENGTH_ZERO : bit;
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signal INT_CODE_IN : bit_vector(34 downto 0);
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signal INT_LENGTH_IN : bit_vector(5 downto 0);
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signal CYCLE1_END : bit;
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signal CYCLE1_FORCE : bit;
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signal OVERFLOW_FLUSH_AUX : bit;
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signal LONG_WORD_D : bit;
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signal LONG_WORD_Q : bit;
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begin
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LENGTH_ZERO <= Nor_Bits(LENGTH_OLD);
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EFC_D <= FLUSH_IN or LENGTH_ZERO or OVERFLOW_OLD;
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FLUSHING_D <= FLUSH_IN and FLUSHING_Q;
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CYCLE1_END <= FLUSH_IN or not(OVERFLOW_OLD or LENGTH_ZERO);
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CYCLE1_FORCE <= FLUSH_IN or LENGTH_ZERO or not(OVERFLOW_OLD);
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FLUSH_END <= CYCLE1_END and EFC_Q;
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OVERFLOW_FLUSH_AUX <= CYCLE1_FORCE and EFC_Q;
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OVERFLOW_FLUSH <= OVERFLOW_FLUSH_AUX;
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SHORT <= OVERFLOW_FLUSH_AUX or LONG_WORD_Q;
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VALIDATE_INPUTS : process( COMP, CODE_IN , LENGTH_IN , FLUSHING_D )
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begin
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if (FLUSHING_D = '1' and COMP='0') then
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INT_CODE_IN <= CODE_IN;
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INT_LENGTH_IN <= LENGTH_IN;
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else
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INT_CODE_IN <= "00000000000000000000000000000000000";
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INT_LENGTH_IN <= "000000";
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end if;
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end process VALIDATE_INPUTS;
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CONTROL_FLIPS : process(CLEAR,CLK)
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begin
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if (CLEAR='0') then
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FLUSHING_Q <= '1';
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EFC_Q <= '1';
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LONG_WORD_Q <= '1';
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elsif ((CLK'event) and (CLK = '1')) then
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if ((RESET = '0') or (COMP = '1')) then
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FLUSHING_Q <= '1';
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EFC_Q <= '1';
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LONG_WORD_Q <= '1';
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else
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FLUSHING_Q <= FLUSHING_D;
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EFC_Q <= EFC_D;
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LONG_WORD_Q <= LONG_WORD_D;
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end if;
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end if;
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end process CONTROL_FLIPS;
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LENGTH_CALC : process( LENGTH_OLD , INT_LENGTH_IN , FLUSHING_D , COMP)
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variable TEMP_LENGTH : bit_vector(6 downto 0);
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variable TEMP_LENGTH_AUX : bit_vector(6 downto 0);
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begin
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TEMP_LENGTH_AUX := ('0' & LENGTH_OLD) + ('0' & INT_LENGTH_IN);
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LONG_WORD_D <= TEMP_LENGTH_AUX(6) or (TEMP_LENGTH_AUX(5) and or_bits(TEMP_LENGTH_AUX(4 downto 0)));
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if ((COMP = '1') or (FLUSHING_D = '0')) then
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TEMP_LENGTH := "0000000";
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else
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TEMP_LENGTH := TEMP_LENGTH_AUX;
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end if;
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LENGTH_NEW <= TEMP_LENGTH(5 downto 0);
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OVERFLOW_LENGTH <= not(TEMP_LENGTH(6));
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end process LENGTH_CALC;
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CODE_SHIFT : process (CODE_OLD , LENGTH_OLD , INT_CODE_IN , OVERFLOW_OLD)
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begin
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--if (COMP = '0') then
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case LENGTH_OLD is
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when "000000" => CODE_NEW <= INT_CODE_IN & x"000000000000000" & "000";
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when "000001" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97) <= CODE_OLD(33);
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else
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CODE_NEW(97) <= CODE_OLD(97);
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end if;
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CODE_NEW(96 downto 62) <= INT_CODE_IN;
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CODE_NEW(61 downto 0) <= x"000000000000000" & "00";
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when "000010" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 96) <= CODE_OLD(33 downto 32);
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else
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CODE_NEW(97 downto 96) <= CODE_OLD(97 downto 96);
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end if;
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CODE_NEW(95 downto 61) <= INT_CODE_IN;
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CODE_NEW(60 downto 0) <= x"000000000000000" & "0";
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when "000011" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 95) <= CODE_OLD(33 downto 31);
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else
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CODE_NEW(97 downto 95) <= CODE_OLD(97 downto 95);
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end if;
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CODE_NEW(94 downto 60) <= INT_CODE_IN;
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CODE_NEW(59 downto 0) <= x"000000000000000";
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when "000100" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 94) <= CODE_OLD(33 downto 30);
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else
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CODE_NEW(97 downto 94) <= CODE_OLD(97 downto 94);
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end if;
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CODE_NEW(93 downto 59) <= INT_CODE_IN;
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CODE_NEW(58 downto 0) <= x"00000000000000" & "000";
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when "000101" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 93) <= CODE_OLD(33 downto 29);
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else
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CODE_NEW(97 downto 93) <= CODE_OLD(97 downto 93);
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end if;
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CODE_NEW(92 downto 58) <= INT_CODE_IN;
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CODE_NEW(57 downto 0) <= x"00000000000000" & "00";
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when "000110" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 92) <= CODE_OLD(33 downto 28);
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else
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CODE_NEW(97 downto 92) <= CODE_OLD(97 downto 92);
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end if;
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CODE_NEW(91 downto 57) <= INT_CODE_IN;
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CODE_NEW(56 downto 0) <= x"00000000000000" & "0";
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when "000111" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 91) <= CODE_OLD(33 downto 27);
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else
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CODE_NEW(97 downto 91) <= CODE_OLD(97 downto 91);
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end if;
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CODE_NEW(90 downto 56) <= INT_CODE_IN;
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CODE_NEW(55 downto 0) <= x"00000000000000";
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when "001000" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 90) <= CODE_OLD(33 downto 26);
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else
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CODE_NEW(97 downto 90) <= CODE_OLD(97 downto 90);
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end if;
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CODE_NEW(89 downto 55) <= INT_CODE_IN;
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CODE_NEW(54 downto 0) <= x"0000000000000" & "000";
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when "001001" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 89) <= CODE_OLD(33 downto 25);
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else
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CODE_NEW(97 downto 89) <= CODE_OLD(97 downto 89);
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end if;
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CODE_NEW(88 downto 54) <= INT_CODE_IN;
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CODE_NEW(53 downto 0) <= x"0000000000000" & "00";
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when "001010" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 88) <= CODE_OLD(33 downto 24);
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else
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CODE_NEW(97 downto 88) <= CODE_OLD(97 downto 88);
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end if;
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CODE_NEW(87 downto 53) <= INT_CODE_IN;
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CODE_NEW(52 downto 0) <= x"0000000000000" & "0";
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when "001011" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 87) <= CODE_OLD(33 downto 23);
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else
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CODE_NEW(97 downto 87) <= CODE_OLD(97 downto 87);
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end if;
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CODE_NEW(86 downto 52) <= INT_CODE_IN;
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CODE_NEW(51 downto 0) <= x"0000000000000";
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when "001100" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 86) <= CODE_OLD(33 downto 22);
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else
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CODE_NEW(97 downto 86) <= CODE_OLD(97 downto 86);
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end if;
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CODE_NEW(85 downto 51) <= INT_CODE_IN;
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CODE_NEW(50 downto 0) <= x"000000000000" & "000";
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when "001101" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 85) <= CODE_OLD(33 downto 21);
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else
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CODE_NEW(97 downto 85) <= CODE_OLD(97 downto 85);
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end if;
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CODE_NEW(84 downto 50) <= INT_CODE_IN;
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CODE_NEW(49 downto 0) <= x"000000000000" & "00";
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when "001110" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 84) <= CODE_OLD(33 downto 20);
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else
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CODE_NEW(97 downto 84) <= CODE_OLD(97 downto 84);
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end if;
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CODE_NEW(83 downto 49) <= INT_CODE_IN;
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CODE_NEW(48 downto 0) <= x"000000000000" & "0";
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when "001111" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 83) <= CODE_OLD(33 downto 19);
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else
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CODE_NEW(97 downto 83) <= CODE_OLD(97 downto 83);
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end if;
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CODE_NEW(82 downto 48) <= INT_CODE_IN;
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CODE_NEW(47 downto 0) <= x"000000000000";
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when "010000" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 82) <= CODE_OLD(33 downto 18);
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else
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CODE_NEW(97 downto 82) <= CODE_OLD(97 downto 82);
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end if;
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CODE_NEW(81 downto 47) <= INT_CODE_IN;
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CODE_NEW(46 downto 0) <= x"00000000000" & "000";
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when "010001" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 81) <= CODE_OLD(33 downto 17);
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else
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CODE_NEW(97 downto 81) <= CODE_OLD(97 downto 81);
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end if;
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CODE_NEW(80 downto 46) <= INT_CODE_IN;
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CODE_NEW(45 downto 0) <= x"00000000000" & "00";
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when "010010" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 80) <= CODE_OLD(33 downto 16);
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else
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CODE_NEW(97 downto 80) <= CODE_OLD(97 downto 80);
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end if;
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CODE_NEW(79 downto 45) <= INT_CODE_IN;
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CODE_NEW(44 downto 0) <= x"00000000000" & "0";
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when "010011" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 79) <= CODE_OLD(33 downto 15);
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else
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CODE_NEW(97 downto 79) <= CODE_OLD(97 downto 79);
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end if;
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CODE_NEW(78 downto 44) <= INT_CODE_IN;
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CODE_NEW(43 downto 0) <= x"00000000000";
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when "010100" => if (OVERFLOW_OLD = '0') then
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CODE_NEW(97 downto 78) <= CODE_OLD(33 downto 14);
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else
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CODE_NEW(97 downto 78) <= CODE_OLD(97 downto 78);
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end if;
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CODE_NEW(77 downto 43) <= INT_CODE_IN;
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|
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CODE_NEW(42 downto 0) <= x"0000000000" & "000";
|
330 |
|
|
|
331 |
|
|
when "010101" => if (OVERFLOW_OLD = '0') then
|
332 |
|
|
CODE_NEW(97 downto 77) <= CODE_OLD(33 downto 13);
|
333 |
|
|
else
|
334 |
|
|
CODE_NEW(97 downto 77) <= CODE_OLD(97 downto 77);
|
335 |
|
|
end if;
|
336 |
|
|
CODE_NEW(76 downto 42) <= INT_CODE_IN;
|
337 |
|
|
CODE_NEW(41 downto 0) <= x"0000000000" & "00";
|
338 |
|
|
|
339 |
|
|
when "010110" => if (OVERFLOW_OLD = '0') then
|
340 |
|
|
CODE_NEW(97 downto 76) <= CODE_OLD(33 downto 12);
|
341 |
|
|
else
|
342 |
|
|
CODE_NEW(97 downto 76) <= CODE_OLD(97 downto 76);
|
343 |
|
|
end if;
|
344 |
|
|
CODE_NEW(75 downto 41) <= INT_CODE_IN;
|
345 |
|
|
CODE_NEW(40 downto 0) <= x"0000000000" & "0";
|
346 |
|
|
|
347 |
|
|
when "010111" => if (OVERFLOW_OLD = '0') then
|
348 |
|
|
CODE_NEW(97 downto 75) <= CODE_OLD(33 downto 11);
|
349 |
|
|
else
|
350 |
|
|
CODE_NEW(97 downto 75) <= CODE_OLD(97 downto 75);
|
351 |
|
|
end if;
|
352 |
|
|
CODE_NEW(74 downto 40) <= INT_CODE_IN;
|
353 |
|
|
CODE_NEW(39 downto 0) <= x"0000000000";
|
354 |
|
|
|
355 |
|
|
when "011000" => if (OVERFLOW_OLD = '0') then
|
356 |
|
|
CODE_NEW(97 downto 74) <= CODE_OLD(33 downto 10);
|
357 |
|
|
else
|
358 |
|
|
CODE_NEW(97 downto 74) <= CODE_OLD(97 downto 74);
|
359 |
|
|
end if;
|
360 |
|
|
CODE_NEW(73 downto 39) <= INT_CODE_IN;
|
361 |
|
|
CODE_NEW(38 downto 0) <= x"000000000" & "000";
|
362 |
|
|
|
363 |
|
|
when "011001" => if (OVERFLOW_OLD = '0') then
|
364 |
|
|
CODE_NEW(97 downto 73) <= CODE_OLD(33 downto 9);
|
365 |
|
|
else
|
366 |
|
|
CODE_NEW(97 downto 73) <= CODE_OLD(97 downto 73);
|
367 |
|
|
end if;
|
368 |
|
|
CODE_NEW(72 downto 38) <= INT_CODE_IN;
|
369 |
|
|
CODE_NEW(37 downto 0) <= x"000000000" & "00";
|
370 |
|
|
|
371 |
|
|
when "011010" => if (OVERFLOW_OLD = '0') then
|
372 |
|
|
CODE_NEW(97 downto 72) <= CODE_OLD(33 downto 8);
|
373 |
|
|
else
|
374 |
|
|
CODE_NEW(97 downto 72) <= CODE_OLD(97 downto 72);
|
375 |
|
|
end if;
|
376 |
|
|
CODE_NEW(71 downto 37) <= INT_CODE_IN;
|
377 |
|
|
CODE_NEW(36 downto 0) <= x"000000000" & "0";
|
378 |
|
|
|
379 |
|
|
when "011011" => if (OVERFLOW_OLD = '0') then
|
380 |
|
|
CODE_NEW(97 downto 71) <= CODE_OLD(33 downto 7);
|
381 |
|
|
else
|
382 |
|
|
CODE_NEW(97 downto 71) <= CODE_OLD(97 downto 71);
|
383 |
|
|
end if;
|
384 |
|
|
CODE_NEW(70 downto 36) <= INT_CODE_IN;
|
385 |
|
|
CODE_NEW(35 downto 0) <= x"000000000";
|
386 |
|
|
|
387 |
|
|
when "011100" => if (OVERFLOW_OLD = '0') then
|
388 |
|
|
CODE_NEW(97 downto 70) <= CODE_OLD(33 downto 6);
|
389 |
|
|
else
|
390 |
|
|
CODE_NEW(97 downto 70) <= CODE_OLD(97 downto 70);
|
391 |
|
|
end if;
|
392 |
|
|
CODE_NEW(69 downto 35) <= INT_CODE_IN;
|
393 |
|
|
CODE_NEW(34 downto 0) <= x"00000000" & "000";
|
394 |
|
|
|
395 |
|
|
when "011101" => if (OVERFLOW_OLD = '0') then
|
396 |
|
|
CODE_NEW(97 downto 69) <= CODE_OLD(33 downto 5);
|
397 |
|
|
else
|
398 |
|
|
CODE_NEW(97 downto 69) <= CODE_OLD(97 downto 69);
|
399 |
|
|
end if;
|
400 |
|
|
CODE_NEW(68 downto 34) <= INT_CODE_IN;
|
401 |
|
|
CODE_NEW(33 downto 0) <= x"00000000" & "00";
|
402 |
|
|
|
403 |
|
|
when "011110" => if (OVERFLOW_OLD = '0') then
|
404 |
|
|
CODE_NEW(97 downto 68) <= CODE_OLD(33 downto 4);
|
405 |
|
|
else
|
406 |
|
|
CODE_NEW(97 downto 68) <= CODE_OLD(97 downto 68);
|
407 |
|
|
end if;
|
408 |
|
|
CODE_NEW(67 downto 33) <= INT_CODE_IN;
|
409 |
|
|
CODE_NEW(32 downto 0) <= x"00000000" & "0";
|
410 |
|
|
|
411 |
|
|
when "011111" => if (OVERFLOW_OLD = '0') then
|
412 |
|
|
CODE_NEW(97 downto 67) <= CODE_OLD(33 downto 3);
|
413 |
|
|
else
|
414 |
|
|
CODE_NEW(97 downto 67) <= CODE_OLD(97 downto 67);
|
415 |
|
|
end if;
|
416 |
|
|
CODE_NEW(66 downto 32) <= INT_CODE_IN;
|
417 |
|
|
CODE_NEW(31 downto 0) <= x"00000000";
|
418 |
|
|
|
419 |
|
|
when "100000" => if (OVERFLOW_OLD = '0') then
|
420 |
|
|
CODE_NEW(97 downto 66) <= CODE_OLD(33 downto 2);
|
421 |
|
|
else
|
422 |
|
|
CODE_NEW(97 downto 66) <= CODE_OLD(97 downto 66);
|
423 |
|
|
end if;
|
424 |
|
|
CODE_NEW(65 downto 31) <= INT_CODE_IN;
|
425 |
|
|
CODE_NEW(30 downto 0) <= x"0000000" & "000";
|
426 |
|
|
|
427 |
|
|
when "100001" => if (OVERFLOW_OLD = '0') then
|
428 |
|
|
CODE_NEW(97 downto 65) <= CODE_OLD(33 downto 1);
|
429 |
|
|
else
|
430 |
|
|
CODE_NEW(97 downto 65) <= CODE_OLD(97 downto 65);
|
431 |
|
|
end if;
|
432 |
|
|
CODE_NEW(64 downto 30) <= INT_CODE_IN;
|
433 |
|
|
CODE_NEW(29 downto 0) <= x"0000000" & "00";
|
434 |
|
|
|
435 |
|
|
when "100010" => if (OVERFLOW_OLD = '0') then
|
436 |
|
|
CODE_NEW(97 downto 64) <= CODE_OLD(33 downto 0);
|
437 |
|
|
else
|
438 |
|
|
CODE_NEW(97 downto 64) <= CODE_OLD(97 downto 64);
|
439 |
|
|
end if;
|
440 |
|
|
CODE_NEW(63 downto 29) <= INT_CODE_IN;
|
441 |
|
|
CODE_NEW(28 downto 0) <= x"0000000" & "0";
|
442 |
|
|
|
443 |
|
|
when "100011" => CODE_NEW <= CODE_OLD(97 downto 63) & INT_CODE_IN & x"0000000";
|
444 |
|
|
|
445 |
|
|
when "100100" => CODE_NEW <= CODE_OLD(97 downto 62) & INT_CODE_IN & x"000000" & "000";
|
446 |
|
|
|
447 |
|
|
when "100101" => CODE_NEW <= CODE_OLD(97 downto 61) & INT_CODE_IN & x"000000" & "00";
|
448 |
|
|
|
449 |
|
|
when "100110" => CODE_NEW <= CODE_OLD(97 downto 60) & INT_CODE_IN & x"000000" & "0";
|
450 |
|
|
|
451 |
|
|
when "100111" => CODE_NEW <= CODE_OLD(97 downto 59) & INT_CODE_IN & x"000000";
|
452 |
|
|
|
453 |
|
|
when "101000" => CODE_NEW <= CODE_OLD(97 downto 58) & INT_CODE_IN & x"00000" & "000";
|
454 |
|
|
|
455 |
|
|
when "101001" => CODE_NEW <= CODE_OLD(97 downto 57) & INT_CODE_IN & x"00000" & "00";
|
456 |
|
|
|
457 |
|
|
when "101010" => CODE_NEW <= CODE_OLD(97 downto 56) & INT_CODE_IN & x"00000" & "0";
|
458 |
|
|
|
459 |
|
|
when "101011" => CODE_NEW <= CODE_OLD(97 downto 55) & INT_CODE_IN & x"00000";
|
460 |
|
|
|
461 |
|
|
when "101100" => CODE_NEW <= CODE_OLD(97 downto 54) & INT_CODE_IN & x"0000" & "000";
|
462 |
|
|
|
463 |
|
|
when "101101" => CODE_NEW <= CODE_OLD(97 downto 53) & INT_CODE_IN & x"0000" & "00";
|
464 |
|
|
|
465 |
|
|
when "101110" => CODE_NEW <= CODE_OLD(97 downto 52) & INT_CODE_IN & x"0000" & "0";
|
466 |
|
|
|
467 |
|
|
when "101111" => CODE_NEW <= CODE_OLD(97 downto 51) & INT_CODE_IN & x"0000";
|
468 |
|
|
|
469 |
|
|
when "110000" => CODE_NEW <= CODE_OLD(97 downto 50) & INT_CODE_IN & x"000" & "000";
|
470 |
|
|
|
471 |
|
|
when "110001" => CODE_NEW <= CODE_OLD(97 downto 49) & INT_CODE_IN & x"000" & "00";
|
472 |
|
|
|
473 |
|
|
when "110010" => CODE_NEW <= CODE_OLD(97 downto 48) & INT_CODE_IN & x"000" & "0";
|
474 |
|
|
|
475 |
|
|
when "110011" => CODE_NEW <= CODE_OLD(97 downto 47) & INT_CODE_IN & x"000";
|
476 |
|
|
|
477 |
|
|
when "110100" => CODE_NEW <= CODE_OLD(97 downto 46) & INT_CODE_IN & x"00" & "000";
|
478 |
|
|
|
479 |
|
|
when "110101" => CODE_NEW <= CODE_OLD(97 downto 45) & INT_CODE_IN & x"00" & "00";
|
480 |
|
|
|
481 |
|
|
when "110110" => CODE_NEW <= CODE_OLD(97 downto 44) & INT_CODE_IN & x"00" & "0";
|
482 |
|
|
|
483 |
|
|
when "110111" => CODE_NEW <= CODE_OLD(97 downto 43) & INT_CODE_IN & x"00";
|
484 |
|
|
|
485 |
|
|
when "111000" => CODE_NEW <= CODE_OLD(97 downto 42) & INT_CODE_IN & x"0" & "000";
|
486 |
|
|
|
487 |
|
|
when "111001" => CODE_NEW <= CODE_OLD(97 downto 41) & INT_CODE_IN & x"0" & "00";
|
488 |
|
|
|
489 |
|
|
when "111010" => CODE_NEW <= CODE_OLD(97 downto 40) & INT_CODE_IN & x"0" & "0";
|
490 |
|
|
|
491 |
|
|
when "111011" => CODE_NEW <= CODE_OLD(97 downto 39) & INT_CODE_IN & x"0";
|
492 |
|
|
|
493 |
|
|
when "111100" => CODE_NEW <= CODE_OLD(97 downto 38) & INT_CODE_IN & "000";
|
494 |
|
|
|
495 |
|
|
when "111101" => CODE_NEW <= CODE_OLD(97 downto 37) & INT_CODE_IN & "00";
|
496 |
|
|
|
497 |
|
|
when "111110" => CODE_NEW <= CODE_OLD(97 downto 36) & INT_CODE_IN & "0";
|
498 |
|
|
|
499 |
|
|
when "111111" => CODE_NEW <= CODE_OLD(97 downto 35) & INT_CODE_IN;
|
500 |
|
|
end case;
|
501 |
|
|
--else
|
502 |
|
|
-- CODE_NEW <= x"000000000000000000000000";
|
503 |
|
|
--end if;
|
504 |
|
|
end process CODE_SHIFT;
|
505 |
|
|
|
506 |
|
|
|
507 |
|
|
end ASSEMBLE2; -- end of architecture
|
508 |
|
|
|
509 |
|
|
|
510 |
|
|
|
511 |
|
|
|
512 |
|
|
|
513 |
|
|
|
514 |
|
|
|