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ex_forward.vhd
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ex_forward.vhd
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library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
entity ex_forward is
port (
i_ex_rx_addr : in std_logic_vector(3 downto 0);
i_ex_ry_addr : in std_logic_vector(3 downto 0);
i_me_rd : in std_logic_vector(3 downto 0);
i_wb_rd : in std_logic_vector(3 downto 0);
i_me_write_reg : in std_logic;
i_wb_write_reg : in std_logic;
q_forward_x : out std_logic_vector(1 downto 0);
q_forward_y : out std_logic_vector(1 downto 0)
) ;
end entity ; -- ex_forward
architecture arch of ex_forward is
begin
process(i_me_write_reg, i_wb_write_reg,
i_me_rd, i_wb_rd, i_ex_rx_addr, i_ex_ry_addr)
begin
q_forward_x <= "00";
q_forward_y <= "00";
if (i_me_write_reg = '1' and i_me_rd = i_ex_rx_addr) then
q_forward_x <= "01";
elsif (i_wb_write_reg = '1' and i_wb_rd = i_ex_rx_addr) then
q_forward_x <= "10";
end if;
if (i_me_write_reg = '1' and i_me_rd = i_ex_ry_addr) then
q_forward_y <= "01";
elsif (i_wb_write_reg = '1' and i_wb_rd = i_ex_ry_addr) then
q_forward_y <= "10";
end if;
end process;
end architecture ; -- arch