move address register

[raggedstone] / dhwk / source / synplify.vhd

-----------------------------------------------------------------------------\r
--                                                                         --\r
-- Copyright (c) 1997 by Synplicity, Inc.  All rights reserved.            --\r
--                                                                         --\r
-- This source file may be used and distributed without restriction        --\r
-- provided that this copyright statement is not removed from the file     --\r
-- and that any derivative work contains this copyright notice.            --\r
--                                                                         --\r
-- Primitive library for post synthesis simulation                         --\r
-- These models are not intended for efficient synthesis                   --\r
--                                                                         --\r
-----------------------------------------------------------------------------\r
library ieee;\r
use ieee.std_logic_1164.all;\r
entity prim_counter is\r
    generic (w : integer := 8);\r
    port (\r
        q : buffer std_logic_vector(w - 1 downto 0);\r
        cout : out std_logic;\r
        d : in std_logic_vector(w - 1 downto 0);\r
        cin : in std_logic;\r
        clk : in std_logic;\r
        rst : in std_logic;\r
        load : in std_logic;\r
        en : in std_logic;\r
        updn : in std_logic\r
    );\r
end prim_counter;\r
\r
architecture beh of prim_counter is\r
    signal nextq : std_logic_vector(w - 1 downto 0);\r
begin\r
    nxt: process (q, cin, updn)\r
        variable i : integer;\r
        variable nextc, c : std_logic;\r
    begin\r
        nextc := cin;\r
        for i in 0 to w - 1 loop\r
            c := nextc;\r
            nextq(i) <= c xor (not updn) xor q(i);\r
            nextc := (c and (not updn)) or \r
                 (c and q(i)) or\r
                 ((not updn) and q(i));\r
        end loop;\r
        cout <= nextc;\r
    end process;\r
\r
    ff : process (clk, rst)\r
    begin\r
        if rst = '1' then\r
            q <= (others => '0');\r
        elsif rising_edge(clk) then\r
            q <= nextq;\r
        end if;\r
    end process ff;\r
end beh;\r
\r
library ieee;\r
use ieee.std_logic_1164.all;\r
entity prim_dff is\r
    port (q : out std_logic;\r
          d : in std_logic;\r
          clk : in std_logic;\r
          r : in std_logic := '0';\r
          s : in std_logic := '0');\r
end prim_dff;\r
\r
architecture beh of prim_dff is\r
begin\r
    ff : process (clk, r, s)\r
    begin\r
        if r = '1' then\r
            q <= '0';\r
        elsif s = '1' then\r
            q <= '1';\r
        elsif rising_edge(clk) then\r
            q <= d;\r
        end if;\r
    end process ff;\r
end beh;\r
\r
library ieee;\r
use ieee.std_logic_1164.all;\r
entity prim_latch is\r
    port (q : out std_logic;\r
          d : in std_logic;\r
          clk : in std_logic;\r
          r : in std_logic := '0';\r
          s : in std_logic := '0');\r
end prim_latch;\r
\r
architecture beh of prim_latch is\r
begin\r
    q <= '0' when r = '1' else\r
         '1' when s = '1' else\r
         d when clk = '1';\r
end beh;\r
\r
\r
library ieee;\r
use ieee.std_logic_1164.all;\r
use ieee.std_logic_unsigned.all;\r
\r
entity prim_ramd is\r
generic (\r
   data_width : integer := 4;\r
    addr_width : integer := 5);\r
port (\r
    dout : out std_logic_vector(data_width-1 downto 0);\r
    aout : in std_logic_vector(addr_width-1 downto 0);\r
    din  : in std_logic_vector(data_width-1 downto 0);\r
    ain : in std_logic_vector(addr_width-1 downto 0);\r
    we   : in std_logic;\r
    clk  : in std_logic);\r
end prim_ramd;\r
\r
architecture beh of prim_ramd is\r
\r
constant depth : integer := 2** addr_width;\r
type mem_type is array (depth-1 downto 0) of std_logic_vector (data_width-1 downto 0);\r
signal mem: mem_type;\r
\r
begin  \r
\r
dout <= mem(conv_integer(aout));\r
\r
process (clk)\r
    begin\r
        if rising_edge(clk) then    \r
            if (we = '1') then\r
                mem(conv_integer(ain)) <= din;\r
            end if;\r
        end if;\r
end process;\r
\r
end beh ;\r
\r
\r
library ieee;\r
use ieee.std_logic_1164.all;\r
package components is\r
    component prim_counter\r
        generic (w : integer);\r
        port (\r
            q : buffer std_logic_vector(w - 1 downto 0);\r
            cout : out std_logic;\r
            d : in std_logic_vector(w - 1 downto 0);\r
            cin : in std_logic;\r
            clk : in std_logic;\r
            rst : in std_logic;\r
            load : in std_logic;\r
            en : in std_logic;\r
            updn : in std_logic\r
        );\r
    end component;\r
    component prim_dff\r
        port (q : out std_logic;\r
              d : in std_logic;\r
              clk : in std_logic;\r
              r : in std_logic := '0';\r
              s : in std_logic := '0');\r
    end component;\r
    component prim_latch\r
        port (q : out std_logic;\r
              d : in std_logic;\r
              clk : in std_logic;\r
              r : in std_logic := '0';\r
              s : in std_logic := '0');\r
    end component;\r
\r
    component prim_ramd is\r
    generic (\r
        data_width : integer := 4;\r
        addr_width : integer := 5);\r
    port (\r
        dout : out std_logic_vector(data_width-1 downto 0);\r
        aout : in std_logic_vector(addr_width-1 downto 0);\r
        din  : in std_logic_vector(data_width-1 downto 0);\r
        ain : in std_logic_vector(addr_width-1 downto 0);\r
        we   : in std_logic;\r
        clk  : in std_logic);\r
    end component;\r
\r
end components;\r