forked from steveicarus/iverilog
-
Notifications
You must be signed in to change notification settings - Fork 1
/
t-dll-expr.cc
358 lines (293 loc) · 9.44 KB
/
t-dll-expr.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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
/*
* Copyright (c) 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-dll-expr.cc,v 1.17 2001/07/27 04:51:44 steve Exp $"
#endif
# include "config.h"
# include <iostream>
# include "t-dll.h"
# include "netlist.h"
# include <assert.h>
# include <malloc.h>
/*
* These methods implement the expression scan that generates the
* ivl_expr_t representing the expression. Each method leaves the
* expr_ member filled with the ivl_expr_t that represents it. Each
* method expects that the expr_ member empty (0) when it starts.
*/
void dll_target::expr_binary(const NetEBinary*net)
{
assert(expr_ == 0);
net->left()->expr_scan(this);
ivl_expr_t left = expr_;
expr_ = 0;
net->right()->expr_scan(this);
ivl_expr_t rght = expr_;
expr_ = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr_);
expr_->type_ = IVL_EX_BINARY;
expr_->width_= net->expr_width();
expr_->signed_ = net->has_sign()? 1 : 0;
expr_->u_.binary_.op_ = net->op();
expr_->u_.binary_.lef_ = left;
expr_->u_.binary_.rig_ = rght;
}
void dll_target::expr_concat(const NetEConcat*net)
{
assert(expr_ == 0);
ivl_expr_t cur = new struct ivl_expr_s;
assert(cur);
cur->type_ = IVL_EX_CONCAT;
cur->width_= net->expr_width();
cur->u_.concat_.rept = net->repeat();
cur->u_.concat_.parms = net->nparms();
cur->u_.concat_.parm = new ivl_expr_t [net->nparms()];
for (unsigned idx = 0 ; idx < net->nparms() ; idx += 1) {
expr_ = 0;
net->parm(idx)->expr_scan(this);
assert(expr_);
cur->u_.concat_.parm[idx] = expr_;
}
expr_ = cur;
}
void dll_target::expr_memory(const NetEMemory*net)
{
assert(expr_ == 0);
if (net->index()) {
net->index()->expr_scan(this);
assert(expr_);
}
ivl_expr_t cur = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(cur);
cur->type_ = IVL_EX_MEMORY;
cur->width_= net->expr_width();
cur->signed_ = net->has_sign()? 1 : 0;
cur->u_.memory_.mem_ = lookup_memory_(net->memory());
cur->u_.memory_.idx_ = expr_;
expr_ = cur;
}
void dll_target::expr_const(const NetEConst*net)
{
assert(expr_ == 0);
ivl_expr_t idx = 0;
expr_ = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr_);
if (net->value().is_string()) {
expr_->type_ = IVL_EX_STRING;
expr_->width_= net->expr_width();
expr_->u_.string_.value_ =strdup(net->value().as_string().c_str());
} else {
verinum val = net->value();
unsigned idx;
char*bits;
expr_->type_ = IVL_EX_NUMBER;
expr_->width_= net->expr_width();
expr_->signed_ = val.has_sign()? 1 : 0;
expr_->u_.number_.bits_ = bits = (char*)malloc(expr_->width_);
for (idx = 0 ; idx < expr_->width_ ; idx += 1)
switch (val.get(idx)) {
case verinum::V0:
bits[idx] = '0';
break;
case verinum::V1:
bits[idx] = '1';
break;
case verinum::Vx:
bits[idx] = 'x';
break;
case verinum::Vz:
bits[idx] = 'z';
break;
default:
assert(0);
}
}
}
void dll_target::expr_scope(const NetEScope*net)
{
assert(expr_ == 0);
expr_ = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr_);
expr_->type_ = IVL_EX_SCOPE;
expr_->u_.scope_.scope = lookup_scope_(net->scope());
}
void dll_target::expr_sfunc(const NetESFunc*net)
{
assert(expr_ == 0);
ivl_expr_t expr = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr);
expr->type_ = IVL_EX_SFUNC;
expr->width_= net->expr_width();
expr->u_.sfunc_.name_ = strdup(net->name());
unsigned cnt = net->nparms();
expr->u_.sfunc_.parms = cnt;
expr->u_.sfunc_.parm = new ivl_expr_t[cnt];
/* make up the parameter expressions. */
for (unsigned idx = 0 ; idx < cnt ; idx += 1) {
net->parm(idx)->expr_scan(this);
assert(expr_);
expr->u_.sfunc_.parm[idx] = expr_;
expr_ = 0;
}
expr_ = expr;
}
void dll_target::expr_ternary(const NetETernary*net)
{
assert(expr_ == 0);
ivl_expr_t expr = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr);
expr->type_ = IVL_EX_TERNARY;
expr->width_ = net->expr_width();
expr->signed_ = net->has_sign()? 1 : 0;
net->cond_expr()->expr_scan(this);
assert(expr_);
expr->u_.ternary_.cond = expr_;
expr_ = 0;
net->true_expr()->expr_scan(this);
assert(expr_);
expr->u_.ternary_.true_e = expr_;
expr_ = 0;
net->false_expr()->expr_scan(this);
assert(expr_);
expr->u_.ternary_.false_e = expr_;
expr_ = expr;
}
void dll_target::expr_signal(const NetESignal*net)
{
assert(expr_ == 0);
expr_ = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr_);
expr_->type_ = IVL_EX_SIGNAL;
expr_->width_= net->expr_width();
expr_->signed_ = net->has_sign()? 1 : 0;
expr_->u_.signal_.sig = find_signal(des_.root_, net->sig());
expr_->u_.signal_.lsi = net->lsi();
expr_->u_.signal_.msi = net->msi();
}
void dll_target::expr_subsignal(const NetEBitSel*net)
{
assert(expr_ == 0);
ivl_expr_t expr = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr);
if (net->sig()->lsb() != 0) {
cerr << net->get_line() << ": sorry: LSB for signal "
<< "is not zero." << endl;
}
expr->type_ = IVL_EX_BITSEL;
expr->width_= net->expr_width();
expr->signed_ = net->has_sign()? 1 : 0;
expr->u_.bitsel_.sig = find_signal(des_.root_, net->sig());
net->index()->expr_scan(this);
assert(expr_);
expr->u_.bitsel_.bit = expr_;
expr_ = expr;
}
void dll_target::expr_ufunc(const NetEUFunc*net)
{
assert(expr_ == 0);
ivl_expr_t expr = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
assert(expr);
expr->type_ = IVL_EX_UFUNC;
expr->width_= net->expr_width();
expr->signed_ = net->has_sign()? 1 : 0;
expr->u_.ufunc_.def = lookup_scope_(net->func());
assert(expr->u_.ufunc_.def->type_ == IVL_SCT_FUNCTION);
unsigned cnt = net->parm_count();
expr->u_.ufunc_.parms = cnt;
expr->u_.ufunc_.parm = new ivl_expr_t[cnt];
/* make up the parameter expressions. */
for (unsigned idx = 0 ; idx < cnt ; idx += 1) {
net->parm(idx)->expr_scan(this);
assert(expr_);
expr->u_.ufunc_.parm[idx] = expr_;
expr_ = 0;
}
expr_ = expr;
}
void dll_target::expr_unary(const NetEUnary*net)
{
assert(expr_ == 0);
net->expr()->expr_scan(this);
assert(expr_);
ivl_expr_t sub = expr_;
expr_ = (ivl_expr_t)calloc(1, sizeof(struct ivl_expr_s));
expr_->type_ = IVL_EX_UNARY;
expr_->width_= net->expr_width();
expr_->u_.unary_.op_ = net->op();
expr_->u_.unary_.sub_ = sub;
}
/*
* $Log: t-dll-expr.cc,v $
* Revision 1.17 2001/07/27 04:51:44 steve
* Handle part select expressions as variants of
* NetESignal/IVL_EX_SIGNAL objects, instead of
* creating new and useless temporary signals.
*
* Revision 1.16 2001/07/25 03:10:49 steve
* Create a config.h.in file to hold all the config
* junk, and support gcc 3.0. (Stephan Boettcher)
*
* Revision 1.15 2001/07/22 00:17:49 steve
* Support the NetESubSignal expressions in vvp.tgt.
*
* Revision 1.14 2001/07/07 20:20:10 steve
* Pass parameters to system functions.
*
* Revision 1.13 2001/05/17 04:37:02 steve
* Behavioral ternary operators for vvp.
*
* Revision 1.12 2001/05/08 23:59:33 steve
* Add ivl and vvp.tgt support for memories in
* expressions and l-values. (Stephan Boettcher)
*
* Revision 1.11 2001/04/06 02:28:02 steve
* Generate vvp code for functions with ports.
*
* Revision 1.10 2001/04/05 01:12:28 steve
* Get signed compares working correctly in vvp.
*
* Revision 1.9 2001/04/02 00:28:35 steve
* Support the scope expression node.
*
* Revision 1.8 2001/03/29 02:52:39 steve
* Add unary ~ operator to tgt-vvp.
*
* Revision 1.7 2000/10/28 22:32:34 steve
* API for concatenation expressions.
*
* Revision 1.6 2000/10/28 17:55:03 steve
* stub for the concat operator.
*
* Revision 1.5 2000/10/05 05:03:01 steve
* xor and constant devices.
*
* Revision 1.4 2000/09/30 02:18:15 steve
* ivl_expr_t support for binary operators,
* Create a proper ivl_scope_t object.
*
* Revision 1.3 2000/09/26 00:30:07 steve
* Add EX_NUMBER and ST_TRIGGER to dll-api.
*
* Revision 1.2 2000/09/24 02:21:53 steve
* Add support for signal expressions.
*
* Revision 1.1 2000/09/23 05:15:07 steve
* Add enough tgt-verilog code to support hello world.
*
*/