📄 alucore_.vhd
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--------------------------------------------------------------------------------- ---- X X XXXXXX XXXXXX XXXXXX XXXXXX X ---- XX XX X X X X X X X XX ---- X X X X X X X X X X X X ---- X X X X X X X X X X X X ---- X X X X XXXXXX X X XXXXXX X ---- X X X X X X X X X ---- X X X X X X X X X ---- X X X X X X X X X X ---- X X XXXXXX XXXXXX XXXXXX XXXXXX X ---- ---- ---- O R E G A N O S Y S T E M S ---- ---- Design & Consulting ---- ----------------------------------------------------------------------------------- ---- Web: http://www.oregano.at/ ---- ---- Contact: mc8051@oregano.at ---- ----------------------------------------------------------------------------------- ---- MC8051 - VHDL 8051 Microcontroller IP Core ---- Copyright (C) 2001 OREGANO SYSTEMS ---- ---- This library is free software; you can redistribute it and/or ---- modify it under the terms of the GNU Lesser General Public ---- License as published by the Free Software Foundation; either ---- version 2.1 of the License, or (at your option) any later version. ---- ---- This library 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 ---- Lesser General Public License for more details. ---- ---- Full details of the license can be found in the file LGPL.TXT. ---- ---- You should have received a copy of the GNU Lesser General Public ---- License along with this library; if not, write to the Free Software ---- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ---- --------------------------------------------------------------------------------------- Author: Roland H鰈ler---- Filename: alucore_.vhd---- Date of Creation: Mon Aug 9 12:14:48 1999---- Version: $Revision: 1.4 $---- Date of Latest Version: $Date: 2002/01/07 12:17:44 $------ Description: This unit performs simple logical operations.---------------------------------------------------------------------------------------library IEEE; use IEEE.std_logic_1164.all; use IEEE.std_logic_arith.all; library work;use work.mc8051_p.all; -----------------------------ENTITY DECLARATION--------------------------------entity alucore is generic (DWIDTH : integer := 8); -- Data width of the ALU port (op_a_i : in std_logic_vector(DWIDTH-1 downto 0); op_b_i : in std_logic_vector(DWIDTH-1 downto 0); alu_cmd_i : in std_logic_vector(3 downto 0); cy_i : in std_logic_vector((DWIDTH-1)/4 downto 0); cy_o : out std_logic_vector((DWIDTH-1)/4 downto 0); result_o : out std_logic_vector(DWIDTH-1 downto 0));end alucore;-- op_a_i....... operand A-- op_b_i....... operand B-- alu_cmd_i.... command for the ALU core-- cy_i......... carry flags (MSB is CY, rest is AC)-- cy_o......... resulting carry out (MSB is CY, rest is AC)-- result_o..... result⌨️ 快捷键说明
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