1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
-- Copyright (C) 1996 Morgan Kaufmann Publishers, Inc
-- This file is part of VESTs (Vhdl tESTs).
-- VESTs 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 2 of the License, or (at
-- your option) any later version.
-- VESTs 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 VESTs; if not, write to the Free Software Foundation,
-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-- ---------------------------------------------------------------------
--
-- $Id: ch_19_join-b.vhd,v 1.3 2001-10-26 16:29:36 paw Exp $
-- $Revision: 1.3 $
--
-- ---------------------------------------------------------------------
library qsim;
architecture behavior of join is
begin
joiner : process
use qsim.token_fifo_adt.all;
variable source : positive range in_arc'range;
variable token_fifo : fifo_type := new_fifo;
variable current_fifo_size : natural := 0;
variable head_token : token_type;
variable number_of_tokens_joined : natural := 0;
type counter_array is array (positive range in_arc'range) of natural;
variable number_joined_from_source : counter_array := (others => 0);
use std.textio.all;
file info_file : text;
variable L : line;
-- Modeltech bug mt043 workaround
variable in_arc_last_value : arc_vector(in_arc'range) := in_arc;
--
procedure write_summary is
begin
write(L, string'("Summary information for join "));
write(L, name);
write(L, string'(" up to time "));
write(L, now, unit => time_unit);
writeline(info_file, L);
write(L, string'(" Number of tokens joined = "));
write(L, natural(number_of_tokens_joined));
writeline(info_file, L);
for source in in_arc'range loop
write(L, string'(" Number from input("));
write(L, source);
write(L, string'(") = "));
write(L, natural(number_joined_from_source(source)));
write(L, string'(" ("));
write(L, real(number_joined_from_source(source))
/ real(number_of_tokens_joined),
digits => 4);
write(L, ')');
writeline(info_file, L);
end loop;
writeline(info_file, L);
end write_summary;
procedure write_trace is
begin
write(L, string'("Join "));
write(L, name);
write(L, string'(": at "));
write(L, now, unit => time_unit);
write(L, string'(" joined from input "));
write(L, source);
write(L, ' ');
write(L, in_arc(source).token, time_unit);
writeline(info_file, L);
end write_trace;
procedure accept_new_tokens is
begin
for index in 1 to in_arc'length loop
-- Modeltech bug mt043 workaround
-- if in_arc(index).transaction /= in_arc'last_value(index).transaction then
if in_arc(index).transaction /= in_arc_last_value(index).transaction then
--
source := index;
insert(token_fifo, in_arc(source).token);
current_fifo_size := current_fifo_size + 1;
number_of_tokens_joined := number_of_tokens_joined + 1;
number_joined_from_source(source) := number_joined_from_source(source) + 1;
if info_detail = trace then
write_trace;
end if;
end if;
end loop;
-- Modeltech bug mt043 workaround
in_arc_last_value := in_arc;
--
end procedure accept_new_tokens;
begin
file_open(info_file, info_file_name, write_mode);
loop
wait on info_detail'transaction, in_arc;
if info_detail'active and info_detail = summary then
write_summary;
end if;
if in_arc'event then
accept_new_tokens;
while current_fifo_size > 0 loop
remove(token_fifo, head_token);
current_fifo_size := current_fifo_size - 1;
out_arc <= arc_type'( transaction => not out_arc.transaction'driving_value,
token => head_token );
wait for 0 fs; -- delta delay before next output token
if info_detail'active and info_detail = summary then
write_summary;
end if;
if in_arc'event then
accept_new_tokens;
end if;
end loop;
end if;
end loop;
end process joiner;
end behavior;
|
