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
|
/**CFile****************************************************************
FileName [dchSimSat.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Choice computation for tech-mapping.]
Synopsis [Performs resimulation using counter-examples.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 29, 2008.]
Revision [$Id: dchSimSat.c,v 1.00 2008/07/29 00:00:00 alanmi Exp $]
***********************************************************************/
#include "dchInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Collects internal nodes in the reverse DFS order.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManCollectTfoCands_rec( Dch_Man_t * p, Aig_Obj_t * pObj )
{
Aig_Obj_t * pFanout, * pRepr;
int iFanout = -1, i;
assert( !Aig_IsComplement(pObj) );
if ( Aig_ObjIsTravIdCurrent(p->pAigTotal, pObj) )
return;
Aig_ObjSetTravIdCurrent(p->pAigTotal, pObj);
// traverse the fanouts
Aig_ObjForEachFanout( p->pAigTotal, pObj, pFanout, iFanout, i )
Dch_ManCollectTfoCands_rec( p, pFanout );
// check if the given node has a representative
pRepr = Aig_ObjRepr( p->pAigTotal, pObj );
if ( pRepr == NULL )
return;
// pRepr is the constant 1 node
if ( pRepr == Aig_ManConst1(p->pAigTotal) )
{
Vec_PtrPush( p->vSimRoots, pObj );
return;
}
// pRepr is the representative of an equivalence class
if ( pRepr->fMarkA )
return;
pRepr->fMarkA = 1;
Vec_PtrPush( p->vSimClasses, pRepr );
}
/**Function*************************************************************
Synopsis [Collect equivalence classes and const1 cands in the TFO.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManCollectTfoCands( Dch_Man_t * p, Aig_Obj_t * pObj1, Aig_Obj_t * pObj2 )
{
Aig_Obj_t * pObj;
int i;
Vec_PtrClear( p->vSimRoots );
Vec_PtrClear( p->vSimClasses );
Aig_ManIncrementTravId( p->pAigTotal );
Aig_ObjSetTravIdCurrent( p->pAigTotal, Aig_ManConst1(p->pAigTotal) );
Dch_ManCollectTfoCands_rec( p, pObj1 );
Dch_ManCollectTfoCands_rec( p, pObj2 );
Vec_PtrSort( p->vSimRoots, (int (*)(void))Aig_ObjCompareIdIncrease );
Vec_PtrSort( p->vSimClasses, (int (*)(void))Aig_ObjCompareIdIncrease );
Vec_PtrForEachEntry( Aig_Obj_t *, p->vSimClasses, pObj, i )
pObj->fMarkA = 0;
}
/**Function*************************************************************
Synopsis [Resimulates the cone of influence of the solved nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManResimulateSolved_rec( Dch_Man_t * p, Aig_Obj_t * pObj )
{
if ( Aig_ObjIsTravIdCurrent(p->pAigTotal, pObj) )
return;
Aig_ObjSetTravIdCurrent(p->pAigTotal, pObj);
if ( Aig_ObjIsCi(pObj) )
{
Aig_Obj_t * pObjFraig;
int nVarNum;
pObjFraig = Dch_ObjFraig( pObj );
assert( !Aig_IsComplement(pObjFraig) );
nVarNum = Dch_ObjSatNum( p, pObjFraig );
// get the value from the SAT solver
// (account for the fact that some vars may be minimized away)
pObj->fMarkB = !nVarNum? 0 : sat_solver_var_value( p->pSat, nVarNum );
// pObj->fMarkB = !nVarNum? Aig_ManRandom(0) & 1 : sat_solver_var_value( p->pSat, nVarNum );
return;
}
Dch_ManResimulateSolved_rec( p, Aig_ObjFanin0(pObj) );
Dch_ManResimulateSolved_rec( p, Aig_ObjFanin1(pObj) );
pObj->fMarkB = ( Aig_ObjFanin0(pObj)->fMarkB ^ Aig_ObjFaninC0(pObj) )
& ( Aig_ObjFanin1(pObj)->fMarkB ^ Aig_ObjFaninC1(pObj) );
// count the cone size
if ( Dch_ObjSatNum( p, Aig_Regular(Dch_ObjFraig(pObj)) ) > 0 )
p->nConeThis++;
}
/**Function*************************************************************
Synopsis [Resimulates the cone of influence of the other nodes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManResimulateOther_rec( Dch_Man_t * p, Aig_Obj_t * pObj )
{
if ( Aig_ObjIsTravIdCurrent(p->pAigTotal, pObj) )
return;
Aig_ObjSetTravIdCurrent(p->pAigTotal, pObj);
if ( Aig_ObjIsCi(pObj) )
{
// set random value
pObj->fMarkB = Aig_ManRandom(0) & 1;
return;
}
Dch_ManResimulateOther_rec( p, Aig_ObjFanin0(pObj) );
Dch_ManResimulateOther_rec( p, Aig_ObjFanin1(pObj) );
pObj->fMarkB = ( Aig_ObjFanin0(pObj)->fMarkB ^ Aig_ObjFaninC0(pObj) )
& ( Aig_ObjFanin1(pObj)->fMarkB ^ Aig_ObjFaninC1(pObj) );
}
/**Function*************************************************************
Synopsis [Handle the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManResimulateCex( Dch_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pRepr )
{
Aig_Obj_t * pRoot, ** ppClass;
int i, k, nSize, RetValue1, RetValue2;
abctime clk = Abc_Clock();
// get the equivalence classes
Dch_ManCollectTfoCands( p, pObj, pRepr );
// resimulate the cone of influence of the solved nodes
p->nConeThis = 0;
Aig_ManIncrementTravId( p->pAigTotal );
Aig_ObjSetTravIdCurrent( p->pAigTotal, Aig_ManConst1(p->pAigTotal) );
Dch_ManResimulateSolved_rec( p, pObj );
Dch_ManResimulateSolved_rec( p, pRepr );
p->nConeMax = Abc_MaxInt( p->nConeMax, p->nConeThis );
// resimulate the cone of influence of the other nodes
Vec_PtrForEachEntry( Aig_Obj_t *, p->vSimRoots, pRoot, i )
Dch_ManResimulateOther_rec( p, pRoot );
// refine these nodes
RetValue1 = Dch_ClassesRefineConst1Group( p->ppClasses, p->vSimRoots, 0 );
// resimulate the cone of influence of the cand classes
RetValue2 = 0;
Vec_PtrForEachEntry( Aig_Obj_t *, p->vSimClasses, pRoot, i )
{
ppClass = Dch_ClassesReadClass( p->ppClasses, pRoot, &nSize );
for ( k = 0; k < nSize; k++ )
Dch_ManResimulateOther_rec( p, ppClass[k] );
// refine this class
RetValue2 += Dch_ClassesRefineOneClass( p->ppClasses, pRoot, 0 );
}
// make sure refinement happened
if ( Aig_ObjIsConst1(pRepr) )
assert( RetValue1 );
else
assert( RetValue2 );
p->timeSimSat += Abc_Clock() - clk;
}
/**Function*************************************************************
Synopsis [Handle the counter-example.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Dch_ManResimulateCex2( Dch_Man_t * p, Aig_Obj_t * pObj, Aig_Obj_t * pRepr )
{
Aig_Obj_t * pRoot;
int i, RetValue;
abctime clk = Abc_Clock();
// get the equivalence class
if ( Dch_ObjIsConst1Cand(p->pAigTotal, pObj) )
Dch_ClassesCollectConst1Group( p->ppClasses, pObj, 500, p->vSimRoots );
else
Dch_ClassesCollectOneClass( p->ppClasses, pRepr, p->vSimRoots );
// resimulate the cone of influence of the solved nodes
p->nConeThis = 0;
Aig_ManIncrementTravId( p->pAigTotal );
Aig_ObjSetTravIdCurrent( p->pAigTotal, Aig_ManConst1(p->pAigTotal) );
Dch_ManResimulateSolved_rec( p, pObj );
Dch_ManResimulateSolved_rec( p, pRepr );
p->nConeMax = Abc_MaxInt( p->nConeMax, p->nConeThis );
// resimulate the cone of influence of the other nodes
Vec_PtrForEachEntry( Aig_Obj_t *, p->vSimRoots, pRoot, i )
Dch_ManResimulateOther_rec( p, pRoot );
// refine this class
if ( Dch_ObjIsConst1Cand(p->pAigTotal, pObj) )
RetValue = Dch_ClassesRefineConst1Group( p->ppClasses, p->vSimRoots, 0 );
else
RetValue = Dch_ClassesRefineOneClass( p->ppClasses, pRepr, 0 );
assert( RetValue );
p->timeSimSat += Abc_Clock() - clk;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
