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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.STD_LOGIC_ARITH.ALL;
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use IEEE.STD_LOGIC_UNSIGNED.ALL;
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use work.CortexIinclude.ALL;
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entity bshifter is Port(
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din : in std_logic_vector(31 downto 0);
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size : in std_logic_vector( 1 downto 0);
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mode : in std_logic_vector( 2 downto 0);
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count : in std_logic_vector( 4 downto 0);
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cyOut : out std_logic;
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dout : out std_logic_vector(31 downto 0)
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);
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end bshifter;
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Library UNISIM;
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use UNISIM.vcomponents.all;
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architecture behavioral of bshifter is
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signal shift : std_logic_vector(4 downto 0);
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signal ENCODE : STD_LOGIC_VECTOR (17 downto 0);
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signal WORDA : STD_LOGIC_VECTOR (17 downto 0);
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signal WORDB : STD_LOGIC_VECTOR (17 downto 0);
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signal WORDC : STD_LOGIC_VECTOR (17 downto 0);
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signal WORDD : STD_LOGIC_VECTOR (17 downto 0);
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signal OUTA : STD_LOGIC_VECTOR (35 downto 0);
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signal OUTB : STD_LOGIC_VECTOR (35 downto 0);
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signal OUTC : STD_LOGIC_VECTOR (35 downto 0);
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signal OUTD : STD_LOGIC_VECTOR (35 downto 0);
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signal temp : std_logic_vector(31 downto 0);
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signal input : std_logic_vector(31 downto 0);
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signal output : std_logic_vector(31 downto 0);
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begin
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process(din, size) -- data in multiplexor
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begin
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case size is
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when SIZE_8BIT => -- 8bit
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input <= din(7 downto 0) &
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din(7 downto 0) &
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din(7 downto 0) &
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din(7 downto 0);
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when SIZE_16BIT => -- 16bit
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input <= din(15 downto 0) & din(15 downto 0);
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when SIZE_32BIT | SIZE_32SBIT => -- 32bit
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input <= din;
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when others =>
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null;
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end case; -- size
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end process;
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process(output, size, mode) -- data output multiplexor
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begin
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case size is
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when SIZE_8BIT => -- 8bit
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case mode is
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when "000" => -- ROL
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dout <= output;
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when "001" => -- LSL
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dout <= output;
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when "010" => -- ROR
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dout <= output;
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when "011" => -- LSR
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dout <= x"000000" & output(31 downto 24);
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when "100" => -- ASR
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dout <= x"000000" & output(31 downto 24);
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when others =>
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dout <= output;
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end case; -- mode
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when SIZE_16BIT => -- 16bit
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case mode is
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when "000" => -- ROL
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dout <= output;
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when "001" => -- LSL
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dout <= output;
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when "010" => -- ROR
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dout <= output;
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when "011" => -- LSR
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dout <= x"0000" & output(31 downto 16);
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when "100" => -- ASR
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dout <= x"0000" & output(31 downto 16);
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when others =>
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dout <= output;
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end case; -- mode
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when SIZE_32BIT | SIZE_32SBIT => -- 32bit
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dout <= output;
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when others =>
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null;
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end case; -- size
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end process;
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process(count, mode, temp, input)
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begin
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case mode is
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when BS_ROL => -- ROL
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shift <= count;
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output <= temp;
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cyOut <= input(conv_integer(32 - count));
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when BS_LSL => -- LSL
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shift <= count;
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cyOut <= input(conv_integer(32 - count));
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case count is
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when "00000" =>
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output <= temp;
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when "00001" =>
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output <= temp and "11111111111111111111111111111110";
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when "00010" =>
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output <= temp and "11111111111111111111111111111100";
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when "00011" =>
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output <= temp and "11111111111111111111111111111000";
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when "00100" =>
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output <= temp and "11111111111111111111111111110000";
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when "00101" =>
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output <= temp and "11111111111111111111111111100000";
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when "00110" =>
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output <= temp and "11111111111111111111111111000000";
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when "00111" =>
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output <= temp and "11111111111111111111111110000000";
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when "01000" =>
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output <= temp and "11111111111111111111111100000000";
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when "01001" =>
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output <= temp and "11111111111111111111111000000000";
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when "01010" =>
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output <= temp and "11111111111111111111110000000000";
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when "01011" =>
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output <= temp and "11111111111111111111100000000000";
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when "01100" =>
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output <= temp and "11111111111111111111000000000000";
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when "01101" =>
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output <= temp and "11111111111111111110000000000000";
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when "01110" =>
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output <= temp and "11111111111111111100000000000000";
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when "01111" =>
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output <= temp and "11111111111111111000000000000000";
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when "10000" =>
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output <= temp and "11111111111111110000000000000000";
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when "10001" =>
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output <= temp and "11111111111111100000000000000000";
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when "10010" =>
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output <= temp and "11111111111111000000000000000000";
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when "10011" =>
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output <= temp and "11111111111110000000000000000000";
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when "10100" =>
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output <= temp and "11111111111100000000000000000000";
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when "10101" =>
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output <= temp and "11111111111000000000000000000000";
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when "10110" =>
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output <= temp and "11111111110000000000000000000000";
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when "10111" =>
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output <= temp and "11111111100000000000000000000000";
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when "11000" =>
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output <= temp and "11111111000000000000000000000000";
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when "11001" =>
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output <= temp and "11111110000000000000000000000000";
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when "11010" =>
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output <= temp and "11111100000000000000000000000000";
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when "11011" =>
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output <= temp and "11111000000000000000000000000000";
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when "11100" =>
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output <= temp and "11110000000000000000000000000000";
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when "11101" =>
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output <= temp and "11100000000000000000000000000000";
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when "11110" =>
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output <= temp and "11000000000000000000000000000000";
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when "11111" =>
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output <= temp and "10000000000000000000000000000000";
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when others =>
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output <= temp;
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end case; -- count
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when BS_ROR => -- ROR
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shift <= 32 - count;
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output <= temp;
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cyOut <= input(conv_integer(count - 1));
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when BS_LSR => -- LSR
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shift <= 32 - count;
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cyOut <= input(conv_integer(count - 1));
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case count is
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when "00000" =>
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output <= temp;
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when "00001" =>
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output <= temp and "01111111111111111111111111111111";
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when "00010" =>
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output <= temp and "00111111111111111111111111111111";
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when "00011" =>
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output <= temp and "00011111111111111111111111111111";
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when "00100" =>
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output <= temp and "00001111111111111111111111111111";
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when "00101" =>
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output <= temp and "00000111111111111111111111111111";
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when "00110" =>
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output <= temp and "00000011111111111111111111111111";
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when "00111" =>
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output <= temp and "00000001111111111111111111111111";
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when "01000" =>
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output <= temp and "00000000111111111111111111111111";
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when "01001" =>
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output <= temp and "00000000011111111111111111111111";
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when "01010" =>
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output <= temp and "00000000001111111111111111111111";
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when "01011" =>
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output <= temp and "00000000000111111111111111111111";
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| 209 |
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when "01100" =>
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| 210 |
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output <= temp and "00000000000011111111111111111111";
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| 211 |
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when "01101" =>
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| 212 |
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output <= temp and "00000000000001111111111111111111";
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| 213 |
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when "01110" =>
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| 214 |
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output <= temp and "00000000000000111111111111111111";
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| 215 |
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when "01111" =>
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| 216 |
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output <= temp and "00000000000000011111111111111111";
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| 217 |
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when "10000" =>
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| 218 |
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output <= temp and "00000000000000001111111111111111";
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| 219 |
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when "10001" =>
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| 220 |
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output <= temp and "00000000000000000111111111111111";
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| 221 |
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when "10010" =>
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| 222 |
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output <= temp and "00000000000000000011111111111111";
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| 223 |
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when "10011" =>
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| 224 |
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output <= temp and "00000000000000000001111111111111";
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| 225 |
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when "10100" =>
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| 226 |
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output <= temp and "00000000000000000000111111111111";
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| 227 |
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when "10101" =>
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| 228 |
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output <= temp and "00000000000000000000011111111111";
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| 229 |
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when "10110" =>
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| 230 |
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output <= temp and "00000000000000000000001111111111";
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| 231 |
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when "10111" =>
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| 232 |
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output <= temp and "00000000000000000000000111111111";
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| 233 |
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when "11000" =>
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| 234 |
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output <= temp and "00000000000000000000000011111111";
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| 235 |
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when "11001" =>
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| 236 |
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output <= temp and "00000000000000000000000001111111";
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| 237 |
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when "11010" =>
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| 238 |
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output <= temp and "00000000000000000000000000111111";
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| 239 |
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when "11011" =>
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| 240 |
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output <= temp and "00000000000000000000000000011111";
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| 241 |
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when "11100" =>
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| 242 |
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output <= temp and "00000000000000000000000000001111";
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| 243 |
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when "11101" =>
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| 244 |
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output <= temp and "00000000000000000000000000000111";
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| 245 |
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when "11110" =>
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| 246 |
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output <= temp and "00000000000000000000000000000011";
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| 247 |
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when "11111" =>
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| 248 |
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output <= temp and "00000000000000000000000000000001";
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| 249 |
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when others =>
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| 250 |
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output <= temp;
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| 251 |
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end case; -- count
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| 252 |
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when BS_ASR => -- ASR
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| 253 |
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shift <= 32 - count;
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| 254 |
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cyOut <= input(conv_integer(count - 1));
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| 255 |
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case count is
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| 256 |
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when "00000" =>
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| 257 |
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output <= (input(31) & input(31) & input(31) & input(31) &
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| 258 |
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input(31) & input(31) & input(31) & input(31) &
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| 259 |
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input(31) & input(31) & input(31) & input(31) &
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| 260 |
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input(31) & input(31) & input(31) & input(31) &
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| 261 |
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input(31) & input(31) & input(31) & input(31) &
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| 262 |
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input(31) & input(31) & input(31) & input(31) &
|
| 263 |
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input(31) & input(31) & input(31) & input(31) &
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| 264 |
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input(31) & input(31) & input(31) & input(31));
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| 265 |
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when "00001" =>
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| 266 |
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output <= (temp and "01111111111111111111111111111111") or
|
| 267 |
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(input(31) & "0000000000000000000000000000000");
|
| 268 |
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when "00010" =>
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| 269 |
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output <= (temp and "00111111111111111111111111111111") or
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| 270 |
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(input(31) & input(31) &
|
| 271 |
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"000000000000000000000000000000");
|
| 272 |
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when "00011" =>
|
| 273 |
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output <= (temp and "00011111111111111111111111111111") or
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| 274 |
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(input(31) & input(31) & input(31) &
|
| 275 |
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"00000000000000000000000000000");
|
| 276 |
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when "00100" =>
|
| 277 |
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output <= (temp and "00001111111111111111111111111111") or
|
| 278 |
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(input(31) & input(31) & input(31) & input(31) &
|
| 279 |
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"0000000000000000000000000000");
|
| 280 |
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when "00101" =>
|
| 281 |
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output <= (temp and "00000111111111111111111111111111") or
|
| 282 |
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(input(31) & input(31) & input(31) & input(31) &
|
| 283 |
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input(31) & "000000000000000000000000000");
|
| 284 |
|
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when "00110" =>
|
| 285 |
|
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output <= (temp and "00000011111111111111111111111111") or
|
| 286 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 287 |
|
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input(31) & input(31) &
|
| 288 |
|
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"00000000000000000000000000");
|
| 289 |
|
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when "00111" =>
|
| 290 |
|
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output <= (temp and "00000001111111111111111111111111") or
|
| 291 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 292 |
|
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input(31) & input(31) & input(31) &
|
| 293 |
|
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"0000000000000000000000000");
|
| 294 |
|
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when "01000" =>
|
| 295 |
|
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output <= (temp and "00000000111111111111111111111111") or
|
| 296 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 297 |
|
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input(31) & input(31) & input(31) & input(31) &
|
| 298 |
|
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"000000000000000000000000");
|
| 299 |
|
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when "01001" =>
|
| 300 |
|
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output <= (temp and "00000000011111111111111111111111") or
|
| 301 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 302 |
|
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input(31) & input(31) & input(31) & input(31) &
|
| 303 |
|
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input(31) & "00000000000000000000000");
|
| 304 |
|
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when "01010" =>
|
| 305 |
|
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output <= (temp and "00000000001111111111111111111111") or
|
| 306 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 307 |
|
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input(31) & input(31) & input(31) & input(31) &
|
| 308 |
|
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input(31) & input(31) & "0000000000000000000000");
|
| 309 |
|
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when "01011" =>
|
| 310 |
|
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output <= (temp and "00000000000111111111111111111111") or
|
| 311 |
|
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(input(31) & input(31) & input(31) & input(31) &
|
| 312 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 313 |
|
|
input(31) & input(31) & input(31) &
|
| 314 |
|
|
"000000000000000000000");
|
| 315 |
|
|
when "01100" =>
|
| 316 |
|
|
output <= (temp and "00000000000011111111111111111111") or
|
| 317 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 318 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 319 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 320 |
|
|
"00000000000000000000");
|
| 321 |
|
|
when "01101" =>
|
| 322 |
|
|
output <= (temp and "00000000000001111111111111111111") or
|
| 323 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 324 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 325 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 326 |
|
|
input(31) & "0000000000000000000");
|
| 327 |
|
|
when "01110" =>
|
| 328 |
|
|
output <= (temp and "00000000000000111111111111111111") or
|
| 329 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 330 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 331 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 332 |
|
|
input(31) & input(31) & "000000000000000000");
|
| 333 |
|
|
when "01111" =>
|
| 334 |
|
|
output <= (temp and "00000000000000011111111111111111") or
|
| 335 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 336 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 337 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 338 |
|
|
input(31) & input(31) & input(31) &
|
| 339 |
|
|
"00000000000000000");
|
| 340 |
|
|
when "10000" =>
|
| 341 |
|
|
output <= (temp and "00000000000000001111111111111111") or
|
| 342 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 343 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 344 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 345 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 346 |
|
|
"0000000000000000");
|
| 347 |
|
|
when "10001" =>
|
| 348 |
|
|
output <= (temp and "00000000000000000111111111111111") or
|
| 349 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 350 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 351 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 352 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 353 |
|
|
input(31) & "000000000000000");
|
| 354 |
|
|
when "10010" =>
|
| 355 |
|
|
output <= (temp and "00000000000000000011111111111111") or
|
| 356 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 357 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 358 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 359 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 360 |
|
|
input(31) & input(31) & "00000000000000");
|
| 361 |
|
|
when "10011" =>
|
| 362 |
|
|
output <= (temp and "00000000000000000001111111111111") or
|
| 363 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 364 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 365 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 366 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 367 |
|
|
input(31) & input(31) & input(31) & "0000000000000");
|
| 368 |
|
|
when "10100" =>
|
| 369 |
|
|
output <= (temp and "00000000000000000000111111111111") or
|
| 370 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 371 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 372 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 373 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 374 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 375 |
|
|
"000000000000");
|
| 376 |
|
|
when "10101" =>
|
| 377 |
|
|
output <= (temp and "00000000000000000000011111111111") or
|
| 378 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 379 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 380 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 381 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 382 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 383 |
|
|
input(31) & "00000000000");
|
| 384 |
|
|
when "10110" =>
|
| 385 |
|
|
output <= (temp and "00000000000000000000001111111111") or
|
| 386 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 387 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 388 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 389 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 390 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 391 |
|
|
input(31) & input(31) & "0000000000");
|
| 392 |
|
|
when "10111" =>
|
| 393 |
|
|
output <= (temp and "00000000000000000000000111111111") or
|
| 394 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 395 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 396 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 397 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 398 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 399 |
|
|
input(31) & input(31) & input(31) & "000000000");
|
| 400 |
|
|
when "11000" =>
|
| 401 |
|
|
output <= (temp and "00000000000000000000000011111111") or
|
| 402 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 403 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 404 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 405 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 406 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 407 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 408 |
|
|
"00000000");
|
| 409 |
|
|
when "11001" =>
|
| 410 |
|
|
output <= (temp and "00000000000000000000000001111111") or
|
| 411 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 412 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 413 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 414 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 415 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 416 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 417 |
|
|
input(31) & "0000000");
|
| 418 |
|
|
when "11010" =>
|
| 419 |
|
|
output <= (temp and "00000000000000000000000000111111") or
|
| 420 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 421 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 422 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 423 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 424 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 425 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 426 |
|
|
input(31) & input(31) & "000000");
|
| 427 |
|
|
when "11011" =>
|
| 428 |
|
|
output <= (temp and "00000000000000000000000000011111") or
|
| 429 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 430 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 431 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 432 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 433 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 434 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 435 |
|
|
input(31) & input(31) & input(31) & "00000");
|
| 436 |
|
|
when "11100" =>
|
| 437 |
|
|
output <= (temp and "00000000000000000000000000001111") or
|
| 438 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 439 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 440 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 441 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 442 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 443 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 444 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 445 |
|
|
"0000");
|
| 446 |
|
|
when "11101" =>
|
| 447 |
|
|
output <= (temp and "00000000000000000000000000000111") or
|
| 448 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 449 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 450 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 451 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 452 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 453 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 454 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 455 |
|
|
input(31) & "000");
|
| 456 |
|
|
when "11110" =>
|
| 457 |
|
|
output <= (temp and "00000000000000000000000000000011") or
|
| 458 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 459 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 460 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 461 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 462 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 463 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 464 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 465 |
|
|
input(31) & input(31) & "00");
|
| 466 |
|
|
when "11111" =>
|
| 467 |
|
|
output <= (temp and "00000000000000000000000000000001") or
|
| 468 |
|
|
(input(31) & input(31) & input(31) & input(31) &
|
| 469 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 470 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 471 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 472 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 473 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 474 |
|
|
input(31) & input(31) & input(31) & input(31) &
|
| 475 |
|
|
input(31) & input(31) & input(31) & "0");
|
| 476 |
|
|
when others =>
|
| 477 |
|
|
output <= temp;
|
| 478 |
|
|
end case; -- count
|
| 479 |
|
|
when others =>
|
| 480 |
|
|
shift <= count;
|
| 481 |
|
|
output <= temp;
|
| 482 |
|
|
end case; -- mode
|
| 483 |
|
|
end process;
|
| 484 |
|
|
|
| 485 |
|
|
-------------- 32bit barrel shifter
|
| 486 |
|
|
ENCODE(17 downto 8) <= (others => '0');
|
| 487 |
|
|
|
| 488 |
|
|
WORDA(17 downto 16) <= (others => '0');
|
| 489 |
|
|
WORDB(17 downto 16) <= (others => '0');
|
| 490 |
|
|
WORDC(17 downto 16) <= (others => '0');
|
| 491 |
|
|
WORDD(17 downto 16) <= (others => '0');
|
| 492 |
|
|
|
| 493 |
|
|
WORDA(15 downto 8) <= input ( 7 downto 0);
|
| 494 |
|
|
WORDB(15 downto 8) <= input (15 downto 8);
|
| 495 |
|
|
WORDC(15 downto 8) <= input (23 downto 16);
|
| 496 |
|
|
WORDD(15 downto 8) <= input (31 downto 24);
|
| 497 |
|
|
|
| 498 |
|
|
WORDA(7 downto 0) <= input (31 downto 24);
|
| 499 |
|
|
WORDB(7 downto 0) <= input ( 7 downto 0);
|
| 500 |
|
|
WORDC(7 downto 0) <= input (15 downto 8);
|
| 501 |
|
|
WORDD(7 downto 0) <= input (23 downto 16);
|
| 502 |
|
|
|
| 503 |
|
|
ONE_HOT:
|
| 504 |
|
|
with SHIFT(2 downto 0) select
|
| 505 |
|
|
encode(7 downto 0) <=
|
| 506 |
|
|
"00000001" when "000", --0
|
| 507 |
|
|
"00000010" when "001", --1
|
| 508 |
|
|
"00000100" when "010", --2
|
| 509 |
|
|
"00001000" when "011", --3
|
| 510 |
|
|
"00010000" when "100", --4
|
| 511 |
|
|
"00100000" when "101", --5
|
| 512 |
|
|
"01000000" when "110", --6
|
| 513 |
|
|
"10000000" when others; --7
|
| 514 |
|
|
|
| 515 |
|
|
MULTA: MULT18X18 port map (A => WORDA, B => ENCODE, P => OUTA);
|
| 516 |
|
|
MULTB: MULT18X18 port map (A => WORDB, B => ENCODE, P => OUTB);
|
| 517 |
|
|
MULTC: MULT18X18 port map (A => WORDC, B => ENCODE, P => OUTC);
|
| 518 |
|
|
MULTD: MULT18X18 port map (A => WORDD, B => ENCODE, P => OUTD);
|
| 519 |
|
|
|
| 520 |
|
|
MUXA:
|
| 521 |
|
|
process(SHIFT, OUTA, OUTB, OUTC, OUTD)
|
| 522 |
|
|
begin
|
| 523 |
|
|
case SHIFT(4 downto 3) is
|
| 524 |
|
|
when "00" => temp(7 downto 0) <= OUTA(15 downto 8);
|
| 525 |
|
|
when "01" => temp(7 downto 0) <= OUTD(15 downto 8);
|
| 526 |
|
|
when "10" => temp(7 downto 0) <= OUTC(15 downto 8);
|
| 527 |
|
|
when others => temp(7 downto 0) <= OUTB(15 downto 8);
|
| 528 |
|
|
end case;
|
| 529 |
|
|
end process;
|
| 530 |
|
|
|
| 531 |
|
|
MUXB:
|
| 532 |
|
|
process(SHIFT, OUTA, OUTB, OUTC, OUTD)
|
| 533 |
|
|
begin
|
| 534 |
|
|
case SHIFT(4 downto 3) is
|
| 535 |
|
|
when "00" => temp(15 downto 8) <= OUTB(15 downto 8);
|
| 536 |
|
|
when "01" => temp(15 downto 8) <= OUTA(15 downto 8);
|
| 537 |
|
|
when "10" => temp(15 downto 8) <= OUTD(15 downto 8);
|
| 538 |
|
|
when others => temp(15 downto 8) <= OUTC(15 downto 8);
|
| 539 |
|
|
end case;
|
| 540 |
|
|
end process;
|
| 541 |
|
|
|
| 542 |
|
|
MUXC:
|
| 543 |
|
|
process(SHIFT, OUTA, OUTB, OUTC, OUTD)
|
| 544 |
|
|
begin
|
| 545 |
|
|
case SHIFT(4 downto 3) is
|
| 546 |
|
|
when "00" => temp(23 downto 16) <= OUTC(15 downto 8);
|
| 547 |
|
|
when "01" => temp(23 downto 16) <= OUTB(15 downto 8);
|
| 548 |
|
|
when "10" => temp(23 downto 16) <= OUTA(15 downto 8);
|
| 549 |
|
|
when others => temp(23 downto 16) <= OUTD(15 downto 8);
|
| 550 |
|
|
end case;
|
| 551 |
|
|
end process;
|
| 552 |
|
|
|
| 553 |
|
|
MUXD:
|
| 554 |
|
|
process(SHIFT, OUTA, OUTB, OUTC, OUTD)
|
| 555 |
|
|
begin
|
| 556 |
|
|
case SHIFT(4 downto 3) is
|
| 557 |
|
|
when "00" => temp(31 downto 24) <= OUTD(15 downto 8);
|
| 558 |
|
|
when "01" => temp(31 downto 24) <= OUTC(15 downto 8);
|
| 559 |
|
|
when "10" => temp(31 downto 24) <= OUTB(15 downto 8);
|
| 560 |
|
|
when others => temp(31 downto 24) <= OUTA(15 downto 8);
|
| 561 |
|
|
end case;
|
| 562 |
|
|
end process;
|
| 563 |
|
|
|
| 564 |
|
|
end behavioral;
|
| 565 |
|
|
|
