-
Notifications
You must be signed in to change notification settings - Fork 522
/
t-null.cc
124 lines (118 loc) · 4.19 KB
/
t-null.cc
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
/*
* Copyright (c) 1999-2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form 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.
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: t-null.cc,v 1.17 2000/08/27 15:51:51 steve Exp $"
#endif
# include "netlist.h"
# include "target.h"
/*
* This target type simply drops the netlist. It is useful for
* skipping the code generation phase.
*/
static class target_null_t : public target_t {
public:
bool start_design(const Design*) { return true; }
bool bufz(const NetBUFZ*) { return true; }
void event(const NetEvent*) { }
void func_def(const NetFuncDef*) { }
void memory(const NetMemory*) { }
void signal(const NetNet*) { }
void task_def(const NetTaskDef*) { }
void net_assign(const NetAssign*) { }
void net_assign_nb(const NetAssignNB*) { }
bool net_const(const NetConst*) { return true; }
void net_probe(const NetEvProbe*) { }
bool proc_block(const NetBlock*) { return true; }
void proc_condit(const NetCondit*) { }
bool proc_delay(const NetPDelay*) { return true; }
void proc_forever(const NetForever*) { }
void proc_repeat(const NetRepeat*) { }
void proc_stask(const NetSTask*) { }
void proc_utask(const NetUTask*) { }
bool proc_wait(const NetEvWait*) { return true; }
} target_null_obj;
extern const struct target tgt_null = { "null", &target_null_obj };
/*
* $Log: t-null.cc,v $
* Revision 1.17 2000/08/27 15:51:51 steve
* t-dll iterates signals, and passes them to the
* target module.
*
* Some of NetObj should return char*, not string.
*
* Revision 1.16 2000/08/14 04:39:57 steve
* add th t-dll functions for net_const, net_bufz and processes.
*
* Revision 1.15 2000/08/09 03:43:45 steve
* Move all file manipulation out of target class.
*
* Revision 1.14 2000/08/08 01:50:42 steve
* target methods need not take a file stream.
*
* Revision 1.13 2000/07/29 16:21:08 steve
* Report code generation errors through proc_delay.
*
* Revision 1.12 2000/06/14 20:29:39 steve
* Ignore more things in null target.
*
* Revision 1.11 2000/04/12 04:23:58 steve
* Named events really should be expressed with PEIdent
* objects in the pform,
*
* Handle named events within the mix of net events
* and edges. As a unified lot they get caught together.
* wait statements are broken into more complex statements
* that include a conditional.
*
* Do not generate NetPEvent or NetNEvent objects in
* elaboration. NetEvent, NetEvWait and NetEvProbe
* take over those functions in the netlist.
*
* Revision 1.10 2000/02/23 02:56:55 steve
* Macintosh compilers do not support ident.
*
* Revision 1.9 2000/02/14 06:04:52 steve
* Unary reduction operators do not set their operand width
*
* Revision 1.8 1999/10/05 03:26:37 steve
* null target ignore assignment nodes.
*
* Revision 1.7 1999/09/30 21:27:29 steve
* Ignore user task definitions.
*
* Revision 1.6 1999/09/22 16:57:24 steve
* Catch parallel blocks in vvm emit.
*
* Revision 1.5 1999/09/17 02:06:26 steve
* Handle unconnected module ports.
*
* Revision 1.4 1999/07/03 02:12:52 steve
* Elaborate user defined tasks.
*
* Revision 1.3 1999/06/19 21:06:16 steve
* Elaborate and supprort to vvm the forever
* and repeat statements.
*
* Revision 1.2 1999/06/06 20:33:30 steve
* implement some null-target code generation.
*
* Revision 1.1 1999/01/24 01:35:08 steve
* Support null target for generating no output.
*
*/