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
358
359
360
361
362
363
|
/**CFile****************************************************************
FileName [darDfs.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [DAG-aware AIG rewriting.]
Synopsis [DFS traversal procedures.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - April 28, 2007.]
Revision [$Id: darDfs.c,v 1.00 2007/04/28 00:00:00 alanmi Exp $]
***********************************************************************/
#include "dar.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_ManDfs_rec( Dar_Obj_t * pObj, Vec_Ptr_t * vNodes )
{
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || Dar_ObjIsMarkA(pObj) )
return;
Dar_ManDfs_rec( Dar_ObjFanin0(pObj), vNodes );
Dar_ManDfs_rec( Dar_ObjFanin1(pObj), vNodes );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA(pObj);
Vec_PtrPush( vNodes, pObj );
}
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Dar_ManDfs( Dar_Man_t * p )
{
Vec_Ptr_t * vNodes;
Dar_Obj_t * pObj;
int i;
vNodes = Vec_PtrAlloc( Dar_ManNodeNum(p) );
Dar_ManForEachObj( p, pObj, i )
Dar_ManDfs_rec( pObj, vNodes );
Dar_ManForEachObj( p, pObj, i )
Dar_ObjClearMarkA(pObj);
return vNodes;
}
/**Function*************************************************************
Synopsis [Collects internal nodes in the DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Dar_ManDfsNode( Dar_Man_t * p, Dar_Obj_t * pNode )
{
Vec_Ptr_t * vNodes;
Dar_Obj_t * pObj;
int i;
assert( !Dar_IsComplement(pNode) );
vNodes = Vec_PtrAlloc( 16 );
Dar_ManDfs_rec( pNode, vNodes );
Vec_PtrForEachEntry( vNodes, pObj, i )
Dar_ObjClearMarkA(pObj);
return vNodes;
}
/**Function*************************************************************
Synopsis [Computes the max number of levels in the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dar_ManCountLevels( Dar_Man_t * p )
{
Vec_Ptr_t * vNodes;
Dar_Obj_t * pObj;
int i, LevelsMax, Level0, Level1;
// initialize the levels
Dar_ManConst1(p)->pData = NULL;
Dar_ManForEachPi( p, pObj, i )
pObj->pData = NULL;
// compute levels in a DFS order
vNodes = Dar_ManDfs( p );
Vec_PtrForEachEntry( vNodes, pObj, i )
{
Level0 = (int)Dar_ObjFanin0(pObj)->pData;
Level1 = (int)Dar_ObjFanin1(pObj)->pData;
pObj->pData = (void *)(1 + Dar_ObjIsExor(pObj) + DAR_MAX(Level0, Level1));
}
Vec_PtrFree( vNodes );
// get levels of the POs
LevelsMax = 0;
Dar_ManForEachPo( p, pObj, i )
LevelsMax = DAR_MAX( LevelsMax, (int)Dar_ObjFanin0(pObj)->pData );
return LevelsMax;
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_ConeMark_rec( Dar_Obj_t * pObj )
{
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || Dar_ObjIsMarkA(pObj) )
return;
Dar_ConeMark_rec( Dar_ObjFanin0(pObj) );
Dar_ConeMark_rec( Dar_ObjFanin1(pObj) );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_ConeCleanAndMark_rec( Dar_Obj_t * pObj )
{
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || Dar_ObjIsMarkA(pObj) )
return;
Dar_ConeCleanAndMark_rec( Dar_ObjFanin0(pObj) );
Dar_ConeCleanAndMark_rec( Dar_ObjFanin1(pObj) );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA( pObj );
pObj->pData = NULL;
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dar_ConeCountAndMark_rec( Dar_Obj_t * pObj )
{
int Counter;
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || Dar_ObjIsMarkA(pObj) )
return 0;
Counter = 1 + Dar_ConeCountAndMark_rec( Dar_ObjFanin0(pObj) ) +
Dar_ConeCountAndMark_rec( Dar_ObjFanin1(pObj) );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA( pObj );
return Counter;
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_ConeUnmark_rec( Dar_Obj_t * pObj )
{
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || !Dar_ObjIsMarkA(pObj) )
return;
Dar_ConeUnmark_rec( Dar_ObjFanin0(pObj) );
Dar_ConeUnmark_rec( Dar_ObjFanin1(pObj) );
assert( Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjClearMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Counts the number of AIG nodes rooted at this cone.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Dar_DagSize( Dar_Obj_t * pObj )
{
int Counter;
Counter = Dar_ConeCountAndMark_rec( Dar_Regular(pObj) );
Dar_ConeUnmark_rec( Dar_Regular(pObj) );
return Counter;
}
/**Function*************************************************************
Synopsis [Transfers the AIG from one manager into another.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_Transfer_rec( Dar_Man_t * pDest, Dar_Obj_t * pObj )
{
assert( !Dar_IsComplement(pObj) );
if ( !Dar_ObjIsNode(pObj) || Dar_ObjIsMarkA(pObj) )
return;
Dar_Transfer_rec( pDest, Dar_ObjFanin0(pObj) );
Dar_Transfer_rec( pDest, Dar_ObjFanin1(pObj) );
pObj->pData = Dar_And( pDest, Dar_ObjChild0Copy(pObj), Dar_ObjChild1Copy(pObj) );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Transfers the AIG from one manager into another.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Dar_Obj_t * Dar_Transfer( Dar_Man_t * pSour, Dar_Man_t * pDest, Dar_Obj_t * pRoot, int nVars )
{
Dar_Obj_t * pObj;
int i;
// solve simple cases
if ( pSour == pDest )
return pRoot;
if ( Dar_ObjIsConst1( Dar_Regular(pRoot) ) )
return Dar_NotCond( Dar_ManConst1(pDest), Dar_IsComplement(pRoot) );
// set the PI mapping
Dar_ManForEachPi( pSour, pObj, i )
{
if ( i == nVars )
break;
pObj->pData = Dar_IthVar(pDest, i);
}
// transfer and set markings
Dar_Transfer_rec( pDest, Dar_Regular(pRoot) );
// clear the markings
Dar_ConeUnmark_rec( Dar_Regular(pRoot) );
return Dar_NotCond( Dar_Regular(pRoot)->pData, Dar_IsComplement(pRoot) );
}
/**Function*************************************************************
Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dar_Compose_rec( Dar_Man_t * p, Dar_Obj_t * pObj, Dar_Obj_t * pFunc, Dar_Obj_t * pVar )
{
assert( !Dar_IsComplement(pObj) );
if ( Dar_ObjIsMarkA(pObj) )
return;
if ( Dar_ObjIsConst1(pObj) || Dar_ObjIsPi(pObj) )
{
pObj->pData = pObj == pVar ? pFunc : pObj;
return;
}
Dar_Compose_rec( p, Dar_ObjFanin0(pObj), pFunc, pVar );
Dar_Compose_rec( p, Dar_ObjFanin1(pObj), pFunc, pVar );
pObj->pData = Dar_And( p, Dar_ObjChild0Copy(pObj), Dar_ObjChild1Copy(pObj) );
assert( !Dar_ObjIsMarkA(pObj) ); // loop detection
Dar_ObjSetMarkA( pObj );
}
/**Function*************************************************************
Synopsis [Composes the AIG (pRoot) with the function (pFunc) using PI var (iVar).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Dar_Obj_t * Dar_Compose( Dar_Man_t * p, Dar_Obj_t * pRoot, Dar_Obj_t * pFunc, int iVar )
{
// quit if the PI variable is not defined
if ( iVar >= Dar_ManPiNum(p) )
{
printf( "Dar_Compose(): The PI variable %d is not defined.\n", iVar );
return NULL;
}
// recursively perform composition
Dar_Compose_rec( p, Dar_Regular(pRoot), pFunc, Dar_ManPi(p, iVar) );
// clear the markings
Dar_ConeUnmark_rec( Dar_Regular(pRoot) );
return Dar_NotCond( Dar_Regular(pRoot)->pData, Dar_IsComplement(pRoot) );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
|
