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我正在尝试为浮点数制作 ALU。这是我的代码，每当我尝试运行测试台波形模拟器的仿真时都会崩溃，说明：

isim_beh.exe 已停止工作

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;
---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity fp is
port( in_one:in std_logic_vector(31 downto 0);
        in_two:in std_logic_vector(31 downto 0);
        select_line:in std_logic_vector(2 downto 0);
        output:out std_logic_vector(31 downto 0));
end fp;

architecture Behavioral of fp is
signal bb:std_logic_vector(31 downto 0);
signal j,k,l:std_logic_vector(31 downto 0);
component floating 
port (ina,inb:in std_logic_vector(31 downto 0);
        sss:in std_logic_vector(2 downto 0);
        outb:out std_logic_vector(31 downto 0));
end component;
component adder
port( a:in std_logic_vector(31 downto 0);
        b:in std_logic_vector(31 downto 0);
        sss:in std_logic_vector(2 downto 0);
        oo:out std_logic_vector(31 downto 0));
end component;
begin
u1:floating port map(in_one,in_two,select_line,j); --When ss=10 then     multiply is chosen
u2:adder port map(in_one,in_two,select_line,k);     --When ss=00 then addition is chosen and when ss=01 then subtraction is chosen
output<=(not in_one) when select_line="100" else
          (in_one and in_two) when select_line="101" else
          (in_one or in_two) when select_line="110" else
          j+k;
end Behavioral;

PS Floating 是乘法的组件。Adder 是加法和减法的组件。

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