1 2-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc 3 4-- This file is part of VESTs (Vhdl tESTs). 5 6-- VESTs is free software; you can redistribute it and/or modify it 7-- under the terms of the GNU General Public License as published by the 8-- Free Software Foundation; either version 2 of the License, or (at 9-- your option) any later version. 10 11-- VESTs is distributed in the hope that it will be useful, but WITHOUT 12-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14-- for more details. 15 16-- You should have received a copy of the GNU General Public License 17-- along with VESTs; if not, write to the Free Software Foundation, 18-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 20-- --------------------------------------------------------------------- 21-- 22-- $Id: ch_15_alut.vhd,v 1.3 2001-11-03 23:19:37 paw Exp $ 23-- $Revision: 1.3 $ 24-- 25-- --------------------------------------------------------------------- 26 27library ieee; 28use ieee.std_logic_1164.all; 29 30package alu_types is 31 32 subtype alu_func is std_logic_vector(3 downto 0); 33 34 constant alu_add : alu_func := "0000"; 35 constant alu_addu : alu_func := "0001"; 36 constant alu_sub : alu_func := "0010"; 37 constant alu_subu : alu_func := "0011"; 38 constant alu_and : alu_func := "0100"; 39 constant alu_or : alu_func := "0101"; 40 constant alu_xor : alu_func := "0110"; 41 constant alu_sll : alu_func := "1000"; 42 constant alu_srl : alu_func := "1001"; 43 constant alu_sra : alu_func := "1010"; 44 constant alu_pass_s1 : alu_func := "1100"; 45 constant alu_pass_s2 : alu_func := "1101"; 46 47end package alu_types; 48