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--**********************************************************************************************

--  General purpose register file for the AVR Core

--  Version 1.4 (Special version for the JTAG OCD)

--  Modified 22.04.2004

--  Designed by Ruslan Lepetenok

--**********************************************************************************************

library IEEE;

use IEEE.std_logic_1164.all;

use IEEE.std_logic_unsigned.all;

use WORK.SynthCtrlPack.all; -- Synthesis control

entity reg_file is port (

                                                  --Clock and reset

                                              cp2         : in  std_logic;

                                                  cp2en       : in  std_logic;

                          ireset      : in  std_logic;

                          reg_rd_in   : in  std_logic_vector(7 downto 0);

                          reg_rd_out  : out std_logic_vector(7 downto 0);

                          reg_rd_out_int  : out std_logic_vector(7 downto 0);

                          reg_rd_adr  : in  std_logic_vector(4 downto 0);

                          reg_rd_adr_int      : in std_logic_vector  (4 downto 0);

                          reg_rr_out  : out std_logic_vector(7 downto 0);

                          reg_rr_adr  : in  std_logic_vector(4 downto 0);

                          reg_rd_wr   : in  std_logic;

                          post_inc    : in  std_logic; -- POST INCREMENT FOR LD/ST INSTRUCTIONS

                          pre_dec     : in  std_logic; -- PRE DECREMENT FOR LD/ST INSTRUCTIONS

                          reg_h_wr    : in  std_logic;

                          reg_h_out   : out std_logic_vector(15 downto 0);

                          reg_h_adr   : in  std_logic_vector(2 downto 0);  -- x,y,z

                                  reg_z_out   : out std_logic_vector(15 downto 0) -- OUTPUT OF R31:R30 FOR LPM/ELPM/IJMP INSTRUCTIONS

                          );

end reg_file;

architecture RTL of reg_file is

type register_file_type is array(0 to 25) of std_logic_vector(7 downto 0);

type register_mux_type is array(0 to 31) of std_logic_vector(7 downto 0);

signal register_file : register_file_type;

signal r26h : std_logic_vector(7 downto 0);

signal r27h : std_logic_vector(7 downto 0);

signal r28h : std_logic_vector(7 downto 0);

signal r29h : std_logic_vector(7 downto 0);

signal r30h : std_logic_vector(7 downto 0);

signal r31h : std_logic_vector(7 downto 0);

signal register_wr_en  : std_logic_vector(31 downto 0);

signal sg_rd_decode   : std_logic_vector (31 downto 0);

signal sg_rd_decode_int   : std_logic_vector (31 downto 0);

signal sg_rr_decode   : std_logic_vector (31 downto 0);

--signal sg_tmp_rd_data : register_mux_type;

signal sg_tmp_rd_data_0 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_1 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_2 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_3 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_4 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_5 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_6 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_7 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_8 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_9 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_10 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_11 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_12 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_13 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_14 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_15 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_16 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_17 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_18 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_19 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_20 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_21 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_22 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_23 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_24 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_25 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_26 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_27 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_28 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_29 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_30 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_31 : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_0_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_1_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_2_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_3_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_4_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_5_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_6_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_7_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_8_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_9_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_10_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_11_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_12_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_13_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_14_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_15_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_16_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_17_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_18_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_19_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_20_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_21_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_22_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_23_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_24_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_25_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_26_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_27_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_28_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_29_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_30_int : std_logic_vector(7 downto 0);

signal sg_tmp_rd_data_31_int : std_logic_vector(7 downto 0);

--signal sg_tmp_rr_data : register_mux_type;

signal sg_tmp_rr_data_0 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_1 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_2 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_3 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_4 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_5 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_6 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_7 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_8 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_9 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_10 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_11 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_12 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_13 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_14 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_15 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_16 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_17 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_18 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_19 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_20 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_21 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_22 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_23 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_24 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_25 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_26 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_27 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_28 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_29 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_30 : std_logic_vector(7 downto 0);

signal sg_tmp_rr_data_31 : std_logic_vector(7 downto 0);

signal sg_adr16_postinc : std_logic_vector (15 downto 0);

signal sg_adr16_predec  : std_logic_vector (15 downto 0);

signal reg_h_in         : std_logic_vector  (15 downto 0);

signal sg_tmp_h_data    : std_logic_vector  (15 downto 0);

begin

write_decode: for i in 0 to 31 generate

register_wr_en(i) <= '1' when (i=reg_rd_adr and reg_rd_wr='1') else '0';

end generate;

rd_mux_decode: for i in 0 to 31 generate

sg_rd_decode(i) <= '1' when (reg_rd_adr=i) else '0';

end generate;

rd_mux_decode_int: for i in 0 to 31 generate

sg_rd_decode_int(i) <= '1' when (reg_rd_adr_int=i) else '0';

end generate;

rr_mux_decode: for i in 0 to 31 generate

sg_rr_decode(i) <= '1' when (reg_rr_adr=i) else '0';

end generate;

reg_z_out <= r31h&r30h; -- R31:R30 OUTPUT FOR LPM/ELPM INSTRUCTIONS 

--sg_tmp_rd_data(0) <= register_file(0) when sg_rd_decode(0)='1' else (others=>'0');

--read_rd_mux: for i in 1 to 25 generate

--sg_tmp_rd_data(i) <= register_file(i) when sg_rd_decode(i)='1' else sg_tmp_rd_data(i-1);

--end generate;

--sg_tmp_rd_data(26) <= r26h when sg_rd_decode(26)='1' else sg_tmp_rd_data(25);

--sg_tmp_rd_data(27) <= r27h when sg_rd_decode(27)='1' else sg_tmp_rd_data(26);

--sg_tmp_rd_data(28) <= r28h when sg_rd_decode(28)='1' else sg_tmp_rd_data(27);

--sg_tmp_rd_data(29) <= r29h when sg_rd_decode(29)='1' else sg_tmp_rd_data(28);

--sg_tmp_rd_data(30) <= r30h when sg_rd_decode(30)='1' else sg_tmp_rd_data(29);

--sg_tmp_rd_data(31) <= r31h when sg_rd_decode(31)='1' else sg_tmp_rd_data(30); 

--reg_rd_out <= sg_tmp_rd_data(31); 

sg_tmp_rd_data_0 <= register_file(0) when sg_rd_decode(0)='1' else (others=>'0');

sg_tmp_rd_data_1 <= register_file(1) when sg_rd_decode(1)='1' else sg_tmp_rd_data_0;

sg_tmp_rd_data_2 <= register_file(2) when sg_rd_decode(2)='1' else sg_tmp_rd_data_1;

sg_tmp_rd_data_3 <= register_file(3) when sg_rd_decode(3)='1' else sg_tmp_rd_data_2;

sg_tmp_rd_data_4 <= register_file(4) when sg_rd_decode(4)='1' else sg_tmp_rd_data_3;

sg_tmp_rd_data_5 <= register_file(5) when sg_rd_decode(5)='1' else sg_tmp_rd_data_4;

sg_tmp_rd_data_6 <= register_file(6) when sg_rd_decode(6)='1' else sg_tmp_rd_data_5;

sg_tmp_rd_data_7 <= register_file(7) when sg_rd_decode(7)='1' else sg_tmp_rd_data_6;

sg_tmp_rd_data_8 <= register_file(8) when sg_rd_decode(8)='1' else sg_tmp_rd_data_7;

sg_tmp_rd_data_9 <= register_file(9) when sg_rd_decode(9)='1' else sg_tmp_rd_data_8;

sg_tmp_rd_data_10 <= register_file(10) when sg_rd_decode(10)='1' else sg_tmp_rd_data_9;

sg_tmp_rd_data_11 <= register_file(11) when sg_rd_decode(11)='1' else sg_tmp_rd_data_10;

sg_tmp_rd_data_12 <= register_file(12) when sg_rd_decode(12)='1' else sg_tmp_rd_data_11;

sg_tmp_rd_data_13 <= register_file(13) when sg_rd_decode(13)='1' else sg_tmp_rd_data_12;

sg_tmp_rd_data_14 <= register_file(14) when sg_rd_decode(14)='1' else sg_tmp_rd_data_13;

sg_tmp_rd_data_15 <= register_file(15) when sg_rd_decode(15)='1' else sg_tmp_rd_data_14;

sg_tmp_rd_data_16 <= register_file(16) when sg_rd_decode(16)='1' else sg_tmp_rd_data_15;

sg_tmp_rd_data_17 <= register_file(17) when sg_rd_decode(17)='1' else sg_tmp_rd_data_16;

sg_tmp_rd_data_18 <= register_file(18) when sg_rd_decode(18)='1' else sg_tmp_rd_data_17;

sg_tmp_rd_data_19 <= register_file(19) when sg_rd_decode(19)='1' else sg_tmp_rd_data_18;

sg_tmp_rd_data_20 <= register_file(20) when sg_rd_decode(20)='1' else sg_tmp_rd_data_19;

sg_tmp_rd_data_21 <= register_file(21) when sg_rd_decode(21)='1' else sg_tmp_rd_data_20;

sg_tmp_rd_data_22 <= register_file(22) when sg_rd_decode(22)='1' else sg_tmp_rd_data_21;

sg_tmp_rd_data_23 <= register_file(23) when sg_rd_decode(23)='1' else sg_tmp_rd_data_22;

sg_tmp_rd_data_24 <= register_file(24) when sg_rd_decode(24)='1' else sg_tmp_rd_data_23;

sg_tmp_rd_data_25 <= register_file(25) when sg_rd_decode(25)='1' else sg_tmp_rd_data_24;

sg_tmp_rd_data_26 <= r26h when sg_rd_decode(26)='1' else sg_tmp_rd_data_25;

sg_tmp_rd_data_27 <= r27h when sg_rd_decode(27)='1' else sg_tmp_rd_data_26;

sg_tmp_rd_data_28 <= r28h when sg_rd_decode(28)='1' else sg_tmp_rd_data_27;

sg_tmp_rd_data_29 <= r29h when sg_rd_decode(29)='1' else sg_tmp_rd_data_28;

sg_tmp_rd_data_30 <= r30h when sg_rd_decode(30)='1' else sg_tmp_rd_data_29;

sg_tmp_rd_data_31 <= r31h when sg_rd_decode(31)='1' else sg_tmp_rd_data_30;

reg_rd_out <= sg_tmp_rd_data_31;

sg_tmp_rd_data_0_int <= register_file(0) when sg_rd_decode_int(0)='1' else (others=>'0');

sg_tmp_rd_data_1_int <= register_file(1) when sg_rd_decode_int(1)='1' else sg_tmp_rd_data_0_int;

sg_tmp_rd_data_2_int <= register_file(2) when sg_rd_decode_int(2)='1' else sg_tmp_rd_data_1_int;

sg_tmp_rd_data_3_int <= register_file(3) when sg_rd_decode_int(3)='1' else sg_tmp_rd_data_2_int;

sg_tmp_rd_data_4_int <= register_file(4) when sg_rd_decode_int(4)='1' else sg_tmp_rd_data_3_int;

sg_tmp_rd_data_5_int <= register_file(5) when sg_rd_decode_int(5)='1' else sg_tmp_rd_data_4_int;

sg_tmp_rd_data_6_int <= register_file(6) when sg_rd_decode_int(6)='1' else sg_tmp_rd_data_5_int;

sg_tmp_rd_data_7_int <= register_file(7) when sg_rd_decode_int(7)='1' else sg_tmp_rd_data_6_int;

sg_tmp_rd_data_8_int <= register_file(8) when sg_rd_decode_int(8)='1' else sg_tmp_rd_data_7_int;

sg_tmp_rd_data_9_int <= register_file(9) when sg_rd_decode_int(9)='1' else sg_tmp_rd_data_8_int;

sg_tmp_rd_data_10_int <= register_file(10) when sg_rd_decode_int(10)='1' else sg_tmp_rd_data_9_int;

sg_tmp_rd_data_11_int <= register_file(11) when sg_rd_decode_int(11)='1' else sg_tmp_rd_data_10_int;

sg_tmp_rd_data_12_int <= register_file(12) when sg_rd_decode_int(12)='1' else sg_tmp_rd_data_11_int;

sg_tmp_rd_data_13_int <= register_file(13) when sg_rd_decode_int(13)='1' else sg_tmp_rd_data_12_int;

sg_tmp_rd_data_14_int <= register_file(14) when sg_rd_decode_int(14)='1' else sg_tmp_rd_data_13_int;

sg_tmp_rd_data_15_int <= register_file(15) when sg_rd_decode_int(15)='1' else sg_tmp_rd_data_14_int;

sg_tmp_rd_data_16_int <= register_file(16) when sg_rd_decode_int(16)='1' else sg_tmp_rd_data_15_int;

sg_tmp_rd_data_17_int <= register_file(17) when sg_rd_decode_int(17)='1' else sg_tmp_rd_data_16_int;

sg_tmp_rd_data_18_int <= register_file(18) when sg_rd_decode_int(18)='1' else sg_tmp_rd_data_17_int;

sg_tmp_rd_data_19_int <= register_file(19) when sg_rd_decode_int(19)='1' else sg_tmp_rd_data_18_int;

sg_tmp_rd_data_20_int <= register_file(20) when sg_rd_decode_int(20)='1' else sg_tmp_rd_data_19_int;

sg_tmp_rd_data_21_int <= register_file(21) when sg_rd_decode_int(21)='1' else sg_tmp_rd_data_20_int;

sg_tmp_rd_data_22_int <= register_file(22) when sg_rd_decode_int(22)='1' else sg_tmp_rd_data_21_int;

sg_tmp_rd_data_23_int <= register_file(23) when sg_rd_decode_int(23)='1' else sg_tmp_rd_data_22_int;

sg_tmp_rd_data_24_int <= register_file(24) when sg_rd_decode_int(24)='1' else sg_tmp_rd_data_23_int;

sg_tmp_rd_data_25_int <= register_file(25) when sg_rd_decode_int(25)='1' else sg_tmp_rd_data_24_int;

sg_tmp_rd_data_26_int <= r26h when sg_rd_decode_int(26)='1' else sg_tmp_rd_data_25_int;

sg_tmp_rd_data_27_int <= r27h when sg_rd_decode_int(27)='1' else sg_tmp_rd_data_26_int;

sg_tmp_rd_data_28_int <= r28h when sg_rd_decode_int(28)='1' else sg_tmp_rd_data_27_int;

sg_tmp_rd_data_29_int <= r29h when sg_rd_decode_int(29)='1' else sg_tmp_rd_data_28_int;

sg_tmp_rd_data_30_int <= r30h when sg_rd_decode_int(30)='1' else sg_tmp_rd_data_29_int;

sg_tmp_rd_data_31_int <= r31h when sg_rd_decode_int(31)='1' else sg_tmp_rd_data_30_int;

reg_rd_out_int <= sg_tmp_rd_data_31_int;

--sg_tmp_rr_data(0) <= register_file(0) when sg_rr_decode(0)='1' else (others=>'0');

--read_rr_mux: for i in 1 to 25 generate

--sg_tmp_rr_data(i) <= register_file(i) when sg_rr_decode(i)='1' else sg_tmp_rr_data(i-1);

--end generate;

--sg_tmp_rr_data() <= register_file() when sg_rr_decode()='1' else sg_tmp_rr_data();

--sg_tmp_rr_data(26) <= r26h when sg_rr_decode(26)='1' else sg_tmp_rr_data(25);

--sg_tmp_rr_data(27) <= r27h when sg_rr_decode(27)='1' else sg_tmp_rr_data(26);

--sg_tmp_rr_data(28) <= r28h when sg_rr_decode(28)='1' else sg_tmp_rr_data(27);

--sg_tmp_rr_data(29) <= r29h when sg_rr_decode(29)='1' else sg_tmp_rr_data(28);

--sg_tmp_rr_data(30) <= r30h when sg_rr_decode(30)='1' else sg_tmp_rr_data(29);

--sg_tmp_rr_data(31) <= r31h when sg_rr_decode(31)='1' else sg_tmp_rr_data(30);

--reg_rr_out <= sg_tmp_rr_data(31);

sg_tmp_rr_data_0 <= register_file(0) when sg_rr_decode(0)='1' else (others=>'0');

sg_tmp_rr_data_1 <= register_file(1) when sg_rr_decode(1)='1' else sg_tmp_rr_data_0;

sg_tmp_rr_data_2 <= register_file(2) when sg_rr_decode(2)='1' else sg_tmp_rr_data_1;

sg_tmp_rr_data_3 <= register_file(3) when sg_rr_decode(3)='1' else sg_tmp_rr_data_2;

sg_tmp_rr_data_4 <= register_file(4) when sg_rr_decode(4)='1' else sg_tmp_rr_data_3;

sg_tmp_rr_data_5 <= register_file(5) when sg_rr_decode(5)='1' else sg_tmp_rr_data_4;

sg_tmp_rr_data_6 <= register_file(6) when sg_rr_decode(6)='1' else sg_tmp_rr_data_5;

sg_tmp_rr_data_7 <= register_file(7) when sg_rr_decode(7)='1' else sg_tmp_rr_data_6;

sg_tmp_rr_data_8 <= register_file(8) when sg_rr_decode(8)='1' else sg_tmp_rr_data_7;

sg_tmp_rr_data_9 <= register_file(9) when sg_rr_decode(9)='1' else sg_tmp_rr_data_8;

sg_tmp_rr_data_10 <= register_file(10) when sg_rr_decode(10)='1' else sg_tmp_rr_data_9;

sg_tmp_rr_data_11 <= register_file(11) when sg_rr_decode(11)='1' else sg_tmp_rr_data_10;

sg_tmp_rr_data_12 <= register_file(12) when sg_rr_decode(12)='1' else sg_tmp_rr_data_11;

sg_tmp_rr_data_13 <= register_file(13) when sg_rr_decode(13)='1' else sg_tmp_rr_data_12;

sg_tmp_rr_data_14 <= register_file(14) when sg_rr_decode(14)='1' else sg_tmp_rr_data_13;

sg_tmp_rr_data_15 <= register_file(15) when sg_rr_decode(15)='1' else sg_tmp_rr_data_14;

sg_tmp_rr_data_16 <= register_file(16) when sg_rr_decode(16)='1' else sg_tmp_rr_data_15;

sg_tmp_rr_data_17 <= register_file(17) when sg_rr_decode(17)='1' else sg_tmp_rr_data_16;

sg_tmp_rr_data_18 <= register_file(18) when sg_rr_decode(18)='1' else sg_tmp_rr_data_17;

sg_tmp_rr_data_19 <= register_file(19) when sg_rr_decode(19)='1' else sg_tmp_rr_data_18;

sg_tmp_rr_data_20 <= register_file(20) when sg_rr_decode(20)='1' else sg_tmp_rr_data_19;

sg_tmp_rr_data_21 <= register_file(21) when sg_rr_decode(21)='1' else sg_tmp_rr_data_20;

sg_tmp_rr_data_22 <= register_file(22) when sg_rr_decode(22)='1' else sg_tmp_rr_data_21;

sg_tmp_rr_data_23 <= register_file(23) when sg_rr_decode(23)='1' else sg_tmp_rr_data_22;

sg_tmp_rr_data_24 <= register_file(24) when sg_rr_decode(24)='1' else sg_tmp_rr_data_23;

sg_tmp_rr_data_25 <= register_file(25) when sg_rr_decode(25)='1' else sg_tmp_rr_data_24;

sg_tmp_rr_data_26 <= r26h when sg_rr_decode(26)='1' else sg_tmp_rr_data_25;

sg_tmp_rr_data_27 <= r27h when sg_rr_decode(27)='1' else sg_tmp_rr_data_26;

sg_tmp_rr_data_28 <= r28h when sg_rr_decode(28)='1' else sg_tmp_rr_data_27;

sg_tmp_rr_data_29 <= r29h when sg_rr_decode(29)='1' else sg_tmp_rr_data_28;

sg_tmp_rr_data_30 <= r30h when sg_rr_decode(30)='1' else sg_tmp_rr_data_29;

sg_tmp_rr_data_31 <= r31h when sg_rr_decode(31)='1' else sg_tmp_rr_data_30;

reg_rr_out <= sg_tmp_rr_data_31;

h_dat_mux_l:for i in 0 to 7 generate

sg_tmp_h_data(i) <= (r26h(i) and reg_h_adr(0)) or (r28h(i) and reg_h_adr(1)) or (r30h(i) and reg_h_adr(2));

end generate;

h_dat_mux_h:for i in 8 to 15 generate

sg_tmp_h_data(i) <= (r27h(i-8) and reg_h_adr(0)) or (r29h(i-8) and reg_h_adr(1)) or (r31h(i-8) and reg_h_adr(2));

end generate;

sg_adr16_postinc <= sg_tmp_h_data +1;

sg_adr16_predec  <= sg_tmp_h_data -1;

-- OUTPUT TO THE ADDRESS BUS

reg_h_out <= sg_adr16_predec when (pre_dec='1') else           -- PREDECREMENT

             sg_tmp_h_data;            -- NO PREDECREMENT

-- TO REGISTERS

reg_h_in  <= sg_adr16_postinc when (post_inc='1') else         -- POST INC 

             sg_adr16_predec;                                  -- PRE DEC

-- Register file with global reset (for simulation)

RegFileWithRst:if CResetRegFile generate

R0_R25:process(cp2,ireset)

begin

 if ireset='0' then

  for i in 0 to 25 loop

   register_file(i) <= (others =>'0');

  end loop;

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   for i in 0 to 25 loop

    if register_wr_en(i)='1' then

     register_file(i) <= reg_rd_in;

    end if;

   end loop;

  end if;

 end if;

end process;

-- R26 (LOW)

R26:process(cp2,ireset)

begin

 if ireset='0' then

  r26h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(26)='1' then

    r26h <= reg_rd_in;

   elsif (reg_h_adr(0)='1'and reg_h_wr='1') then

    r26h <= reg_h_in(7 downto 0);

   end if;

  end if;

 end if;

end process;

-- R27 (HIGH)

R27:process(cp2,ireset)

begin

 if ireset='0' then

  r27h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(27)='1' then

    r27h <= reg_rd_in;

   elsif (reg_h_adr(0)='1'and reg_h_wr='1') then

    r27h <= reg_h_in(15 downto 8);

   end if;

  end if;

 end if;

end process;

-- R28 (LOW)

R28:process(cp2,ireset)

begin

 if ireset='0' then

  r28h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(28)='1' then

    r28h <= reg_rd_in;

   elsif (reg_h_adr(1)='1'and reg_h_wr='1') then

    r28h <= reg_h_in(7 downto 0);

   end if;

  end if;

 end if;

end process;

-- R29 (HIGH)

R29:process(cp2,ireset)

begin

 if ireset='0' then

  r29h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(29)='1' then

    r29h <= reg_rd_in;

   elsif (reg_h_adr(1)='1'and reg_h_wr='1') then

    r29h <= reg_h_in(15 downto 8);

   end if;

  end if;

 end if;

end process;

-- R30 (LOW)

R30:process(cp2,ireset)

begin

 if ireset='0' then

  r30h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(30)='1' then

    r30h <= reg_rd_in;

   elsif (reg_h_adr(2)='1'and reg_h_wr='1') then

    r30h <= reg_h_in(7 downto 0);

   end if;

  end if;

 end if;

end process;

-- R31 (HIGH)

R31:process(cp2,ireset)

begin

 if ireset='0' then

  r31h <= (others =>'0');

 elsif (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(31)='1' then

    r31h <= reg_rd_in;

   elsif (reg_h_adr(2)='1'and reg_h_wr='1') then

    r31h <= reg_h_in(15 downto 8);

   end if;

  end if;

 end if;

end process;

end generate;

-- Register file without global reset (for synthesis)

RegFileWithoutRst:if not CResetRegFile generate

R0_R25:process(cp2)

begin

 if (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   for i in 0 to 25 loop

    if register_wr_en(i)='1' then

     register_file(i) <= reg_rd_in;

    end if;

   end loop;

  end if;

 end if;

end process;

-- R26 (LOW)

R26:process(cp2)

begin

 if (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(26)='1' then

    r26h <= reg_rd_in;

   elsif (reg_h_adr(0)='1'and reg_h_wr='1') then

    r26h <= reg_h_in(7 downto 0);

   end if;

  end if;

 end if;

end process;

-- R27 (HIGH)

R27:process(cp2)

begin

 if (cp2='1' and cp2'event) then

  if (cp2en='1') then                                                     -- Clock enable        

   if register_wr_en(27)='1' then