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
|
/**CFile****************************************************************
FileName [cswTable.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Cut sweeping.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - July 11, 2007.]
Revision [$Id: cswTable.c,v 1.00 2007/07/11 00:00:00 alanmi Exp $]
***********************************************************************/
#include "cswInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Computes hash value of the cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned Csw_CutHash( Csw_Cut_t * pCut )
{
static int s_FPrimes[128] = {
1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459,
1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997,
2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543,
2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089,
3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671,
3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243,
4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871,
4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471,
5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073,
6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689,
6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309,
7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933,
8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147
};
unsigned uHash;
int i;
assert( pCut->nFanins <= 16 );
uHash = 0;
for ( i = 0; i < pCut->nFanins; i++ )
uHash ^= pCut->pFanins[i] * s_FPrimes[i];
return uHash;
}
/**Function*************************************************************
Synopsis [Returns the total number of cuts in the table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Csw_TableCountCuts( Csw_Man_t * p )
{
Csw_Cut_t * pEnt;
int i, Counter = 0;
for ( i = 0; i < p->nTableSize; i++ )
for ( pEnt = p->pTable[i]; pEnt; pEnt = pEnt->pNext )
Counter++;
return Counter;
}
/**Function*************************************************************
Synopsis [Adds the cut to the hash table.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Csw_TableCutInsert( Csw_Man_t * p, Csw_Cut_t * pCut )
{
int iEntry = Csw_CutHash(pCut) % p->nTableSize;
pCut->pNext = p->pTable[iEntry];
p->pTable[iEntry] = pCut;
}
/**Function*************************************************************
Synopsis [Returns an equivalent node if it exists.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Obj_t * Csw_TableCutLookup( Csw_Man_t * p, Csw_Cut_t * pCut )
{
Aig_Obj_t * pRes = NULL;
Csw_Cut_t * pEnt;
unsigned * pTruthNew, * pTruthOld;
int iEntry = Csw_CutHash(pCut) % p->nTableSize;
for ( pEnt = p->pTable[iEntry]; pEnt; pEnt = pEnt->pNext )
{
if ( pEnt->nFanins != pCut->nFanins )
continue;
if ( pEnt->uSign != pCut->uSign )
continue;
if ( memcmp( pEnt->pFanins, pCut->pFanins, sizeof(int) * pCut->nFanins ) )
continue;
pTruthOld = Csw_CutTruth(pEnt);
pTruthNew = Csw_CutTruth(pCut);
if ( (pTruthOld[0] & 1) == (pTruthNew[0] & 1) )
{
if ( Kit_TruthIsEqual( pTruthOld, pTruthNew, pCut->nFanins ) )
{
pRes = Aig_ManObj( p->pManRes, pEnt->iNode );
assert( pRes->fPhase == Aig_ManObj( p->pManRes, pCut->iNode )->fPhase );
break;
}
}
else
{
if ( Kit_TruthIsOpposite( pTruthOld, pTruthNew, pCut->nFanins ) )
{
pRes = Aig_Not( Aig_ManObj( p->pManRes, pEnt->iNode ) );
assert( Aig_Regular(pRes)->fPhase != Aig_ManObj( p->pManRes, pCut->iNode )->fPhase );
break;
}
}
}
return pRes;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
|
