+-- `Deep Thought', a softcore CPU implemented on a FPGA
+--
+-- Copyright (C) 2010 Markus Hofstaetter <markus.manrow@gmx.at>
+-- Copyright (C) 2010 Martin Perner <e0725782@student.tuwien.ac.at>
+-- Copyright (C) 2010 Stefan Rebernig <stefan.rebernig@gmail.com>
+-- Copyright (C) 2010 Manfred Schwarz <e0725898@student.tuwien.ac.at>
+-- Copyright (C) 2010 Bernhard Urban <lewurm@gmail.com>
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program. If not, see <http://www.gnu.org/licenses/>.
+
library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
use work.common_pkg.all;
+use work.extension_pkg.all;
--use work.core_extension.all;
package alu_pkg is
- type status_rec is record
- zero : std_logic;
- oflo : std_logic;
- sign : std_logic;
- carry : std_logic;
- end record;
-
- subtype status_t is byte_t;
--type alu_interal_rec is record
--
--end record alu_internal_rec;
result_addr : gp_addr_t;
status : status_rec;
- --stackpointer : gp_register_t;
alu_jump : std_logic;
brpr : std_logic;
reg_op : std_logic;
mem_op : std_logic;
- --new_val : std_logic;
mem_en : std_logic;
hw_op : std_logic;
end record alu_result_rec;
- constant SHIFT_WIDTH : integer := 4; --log2c(gp_register_t'length);
+ constant SHIFT_WIDTH : integer := 5; --log2c(gp_register_t'length);
constant COND_ZERO : condition_t := "0001";
constant COND_NZERO : condition_t := "0000";
op_group : in op_info_t;
left_operand : in gp_register_t;
right_operand : in gp_register_t;
- displacement : in gp_register_t;
- prog_cnt : in instr_addr_t;
- brpr : in std_logic;
+
+ displacement : in gp_register_t;
+ prog_cnt : in instr_addr_t;
+ brpr : in std_logic;
+
op_detail : in op_opt_t;
+
alu_state : in alu_result_rec;
+ pval : in gp_register_t;
+ pval_nxt : in gp_register_t;
+
alu_result : out alu_result_rec;
- addr : out word_t; --memaddr
- data : out gp_register_t --mem data --ureg
+ addr : out word_t; --memaddr
+ data : out gp_register_t; --mem data --ureg
+
+ pinc : out std_logic;
+ pwr_en : out std_logic;
+ paddr : out paddr_t
);
end component alu;