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_09_ch_09_04.vhd,v 1.2 2001-10-24 23:31:00 paw Exp $ 23-- $Revision: 1.2 $ 24-- 25-- --------------------------------------------------------------------- 26 27package arithmetic_ops is 28 29 -- code from book 30 31 procedure increment ( bv : inout bit_vector; by : in integer := 1 ); 32 33 procedure increment ( int : inout integer; by : in integer := 1 ); 34 35 -- end code from book 36 37end package arithmetic_ops; 38 39package body arithmetic_ops is 40 41 procedure increment ( bv : inout bit_vector; by : in integer := 1 ) is 42 begin 43 end procedure increment; 44 45 procedure increment ( int : inout integer; by : in integer := 1 ) is 46 begin 47 end procedure increment; 48 49end package body arithmetic_ops; 50 51 52entity ch_09_04 is 53 54end entity ch_09_04; 55 56library stimulus; 57use stimulus.stimulus_generators.all; 58 59architecture test of ch_09_04 is 60 61 -- code from book 62 63 -- MTI bug mt017 64 -- alias bv_increment is work.arithmetic_ops.increment [ bit_vector, integer ]; 65 66 alias int_increment is work.arithmetic_ops.increment [ integer, integer ]; 67 68 -- workaround to avoid MTI bug mt018 69 -- alias "*" is "and" [ bit, bit return bit ]; 70 71 alias "*" is std.standard."and" [ bit, bit return bit ]; 72 73 -- alias "+" is "or" [ bit, bit return bit ]; 74 75 alias "+" is std.standard."or" [ bit, bit return bit ]; 76 77 -- alias "-" is "not" [ bit return bit ]; 78 79 alias "-" is std.standard."not" [ bit return bit ]; 80 81 -- end workaround 82 83 alias high is std.standard.'1' [ return bit ]; 84 85 -- end code from book 86 87 signal a, b, c, s : bit := '0'; 88 signal test_vector : bit_vector(1 to 3); 89 signal test_high : bit := high; 90 91begin 92 93 -- code from book 94 95 -- workaround to avoid MTI bug mt018 96 -- s <= a * b + (-a) * c; 97 98 s <= (a and b) or ((not a) and c); 99 100 -- end workaround 101 102 -- end code from book 103 104 stimulus : all_possible_values ( bv => test_vector, 105 delay_between_values => 10 ns ); 106 107 (a, b, c) <= test_vector; 108 109end architecture test; 110