基于quartus 2 9.0c 軟件的MIPS指令集16位CPU設計

ID:505284 · 發(fā)表于 2019-11-20 12:20

基于MIPS_RISC指令集的用VHDL語言寫的可以在quartus軟件運行成功的16位cpu模型機源碼及CPU芯片邏輯技術設計書分享，以及全國大學生計算機設計大賽參考，本設計僅僅只是基礎設計，滿足5條機器指令執(zhí)行，若需要更多要求，可以自行更改邏輯設計滿足不同要求。注意還有現(xiàn)成的設計原稿哦，文件大小限制，去繁從簡為主！

總體狀態(tài)轉換圖

畫出QuartusⅡ環(huán)境下的數(shù)據(jù)通路總圖

七、編寫匯編語言，調試程序，給出結果

為了方便輸入與編碼，指令格式自己譯成操作碼/尋址方式/目的寄存器/源寄存器

總體仿真波形圖

1．ALU
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_arith.all;
use ieee.std_logic_unsigned.all;
entity ALU is
port(
   input1,input2:in std_logic_vector(15 downto 0);  --兩個操作數(shù)
   choice:in std_logic_vector(5 downto 0);       --選擇進行的運算
   result:buffer std_logic_vector(15 downto 0);    --結果輸出
   result2:buffer std_logic_vector(15 downto 0);    --結果輸出
   psw :buffer std_logic_vector(15 downto 0)    --PSW,psw(0)為C,psw(1)為Z,psw(2)為S,psw(3)為O

   );
end ALU;

architecture alu_b of ALU is
signal q : std_logic_vector(16 downto 0);  --中間變量
signal result3:std_logic_vector(32 downto 0);    --中間變量
begin
  process(input1,input2,choice,q,psw)
  variable i : integer;
  variable p :std_logic_vector(15 downto 0);
  begin
if  choice="000001" then             --ADD
      q<=('0' & input1) + ('0' & input2);
      psw(0) <=q(16);
      psw(2) <=q(15);
      if q(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
      result <= q(15 downto 0);
elsif choice="000010"then             --ADDU
      result <= input1 + input2;
elsif choice="000011" then             --SUB
      q<=('0'&input1) - ('0'& input2);
      psw(0) <=q(16);
      psw(2) <=q(15);
      if q(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
      result <= q(15 downto 0);

elsif choice="000100" then             --SUBU
      result <= input1 - input2;
--elsif choice="000101" then             --IMUL
-- result3<= ('0'&input1) * ('0'& input2);
-- psw(0) <=result3(32);
-- psw(2) <=result3(31);
-- if result3(31 downto 0)= "00000000000000000000000000000000" then
-- psw(1)<= '1';
      --else
--       psw(1)<= '0';
      --end if;
-- result<=result3(31 downto 16);
-- result2<=result3(15 downto 0);
--elsif choice="000110" then             --IDIV
-- q<= ('0'&input1) mod ('0'& input2);
-- psw(0) <=q(16);
-- psw(2) <=q(15);
-- if q(15 downto 0)= "0000000000000000" then
--       psw(1)<= '1';
-- else
--       psw(1)<= '0';
-- end if;
-- result <=q(15 downto 0);
-- result2 <=input1 rem input2;
elsif choice="000111" then             --INC
      q(15 downto 0)<= "0000000000000001" + input1;
      result <=q(15 downto 0);
elsif choice="001000" then             --DEC
      q(15 downto 0)<= input1 - "0000000000000001" ;
      result <=q(15 downto 0);
elsif choice="001001" then             --CMP
      q<=('0'&input1) - ('0'& input2);
      psw(0) <=q(16);
      psw(2) <=q(15);
      if q(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
elsif choice="001010" then             --NEG
      q<="10000000000000000" - ('0'&input1);
      psw(0) <=q(16);
      psw(2) <=q(15);
      if q(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
      result <=q(15 downto 0);
elsif choice="001011" then             --NOT
      result <= not input1;
elsif choice="001100" then             --AND
      psw(0) <='0';
      psw(3) <='0';
      result <= input1 and input2;
      psw(2) <= result(15);
      if result(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
elsif choice="001101" then             --OR
      psw(0) <='0';
      psw(3) <='0';
      result <= input1 or input2;
      psw(2) <= result(15);
      if result(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
elsif choice="001110" then             --XOR
      psw(0) <='0';
      psw(3) <='0';
      result <= input1 xor input2;
      psw(2) <= result(15);
      if result(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
elsif choice="001111" then             --TEST
      psw(0) <='0';
      psw(3) <='0';
      q(15 downto 0) <= input1 xor input2;
      psw(2) <= q(15);
      if q(15 downto 0)= "0000000000000000" then
         psw(1)<= '1';
      else
         psw(1)<= '0';
      end if;
elsif choice="010000" then             --SHL
-- function  f(bits,shift)
--       for i in 1 to bits loop
   --       case shift is
   --          when shift="1001"
--                p:='0' & p(15 downto 1);
--          when shift="1010"
--                p:=p(15 downto 1) & '0' ;
--          when shift ="1011" then
--                p:=p(14 downto 0)& p(15);
--          when shift ="1100" then
--             p:=p(0) & p(15 downto 1) ;
--       end loop;
-- end function

end if;

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基于quartus 2 9.0c 軟件的MIPS指令集16位CPU設計

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