1 -- `Deep Thought', a softcore CPU implemented on a FPGA
3 -- Copyright (C) 2010 Markus Hofstaetter <markus.manrow@gmx.at>
4 -- Copyright (C) 2010 Martin Perner <e0725782@student.tuwien.ac.at>
5 -- Copyright (C) 2010 Stefan Rebernig <stefan.rebernig@gmail.com>
6 -- Copyright (C) 2010 Manfred Schwarz <e0725898@student.tuwien.ac.at>
7 -- Copyright (C) 2010 Bernhard Urban <lewurm@gmail.com>
9 -- This program is free software: you can redistribute it and/or modify
10 -- it under the terms of the GNU General Public License as published by
11 -- the Free Software Foundation, either version 3 of the License, or
12 -- (at your option) any later version.
14 -- This program is distributed in the hope that it will be useful,
15 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
16 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 -- GNU General Public License for more details.
19 -- You should have received a copy of the GNU General Public License
20 -- along with this program. If not, see <http://www.gnu.org/licenses/>.
23 use IEEE.std_logic_1164.all;
24 use IEEE.numeric_std.all;
26 use work.core_pkg.all;
27 use work.common_pkg.all;
30 entity decode_stage is
34 RESET_VALUE : std_logic;
45 instruction : in instruction_word_t;
46 prog_cnt : in instruction_addr_t;
47 reg_w_addr : in std_logic_vector(REG_ADDR_WIDTH-1 downto 0);
48 reg_wr_data : in gp_register_t;
49 reg_we : in std_logic;
53 -- reg1_rd_data : out gp_register_t;
54 -- reg2_rd_data : out gp_register_t;
55 branch_prediction_res : out instruction_addr_t;
56 branch_prediction_bit : out std_logic;
58 to_next_stage : out dec_op