summaryrefslogtreecommitdiffstats
path: root/src/base/abci/abcCollapse.c
blob: 20fe04b580cce80d8486e57dcbbdec6c897a3b27 (plain)
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
/**CFile****************************************************************

  FileName    [abcCollapse.c]

  SystemName  [ABC: Logic synthesis and verification system.]

  PackageName [Network and node package.]

  Synopsis    [Collapsing the network into two-levels.]

  Author      [Alan Mishchenko]
  
  Affiliation [UC Berkeley]

  Date        [Ver. 1.0. Started - June 20, 2005.]

  Revision    [$Id: abcCollapse.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]

***********************************************************************/

#include "base/abc/abc.h"
#include "misc/extra/extraBdd.h"

ABC_NAMESPACE_IMPL_START


////////////////////////////////////////////////////////////////////////
///                        DECLARATIONS                              ///
////////////////////////////////////////////////////////////////////////

static Abc_Ntk_t * Abc_NtkFromGlobalBdds( Abc_Ntk_t * pNtk );
static Abc_Obj_t * Abc_NodeFromGlobalBdds( Abc_Ntk_t * pNtkNew, DdManager * dd, DdNode * bFunc );

////////////////////////////////////////////////////////////////////////
///                     FUNCTION DEFINITIONS                         ///
////////////////////////////////////////////////////////////////////////

/**Function*************************************************************

  Synopsis    [Collapses the network.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Abc_NtkCollapse( Abc_Ntk_t * pNtk, int fBddSizeMax, int fDualRail, int fReorder, int fVerbose )
{
    Abc_Ntk_t * pNtkNew;
    abctime clk = Abc_Clock();

    assert( Abc_NtkIsStrash(pNtk) );
    // compute the global BDDs
    if ( Abc_NtkBuildGlobalBdds(pNtk, fBddSizeMax, 1, fReorder, fVerbose) == NULL )
        return NULL;
    if ( fVerbose )
    {
        DdManager * dd = (DdManager *)Abc_NtkGlobalBddMan( pNtk );
        printf( "Shared BDD size = %6d nodes.  ", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
        ABC_PRT( "BDD construction time", Abc_Clock() - clk );
    }

    // create the new network
    pNtkNew = Abc_NtkFromGlobalBdds( pNtk );
//    Abc_NtkFreeGlobalBdds( pNtk );
    Abc_NtkFreeGlobalBdds( pNtk, 1 );
    if ( pNtkNew == NULL )
    {
//        Cudd_Quit( pNtk->pManGlob );
//        pNtk->pManGlob = NULL;
        return NULL;
    }
//    Extra_StopManager( pNtk->pManGlob );
//    pNtk->pManGlob = NULL;

    // make the network minimum base
    Abc_NtkMinimumBase( pNtkNew );

    if ( pNtk->pExdc )
        pNtkNew->pExdc = Abc_NtkDup( pNtk->pExdc );

    // make sure that everything is okay
    if ( !Abc_NtkCheck( pNtkNew ) )
    {
        printf( "Abc_NtkCollapse: The network check has failed.\n" );
        Abc_NtkDelete( pNtkNew );
        return NULL;
    }
    return pNtkNew;
}


//int runtime1, runtime2;

/**Function*************************************************************

  Synopsis    [Derives the network with the given global BDD.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Ntk_t * Abc_NtkFromGlobalBdds( Abc_Ntk_t * pNtk )
{
//    extern void Extra_ShuffleTest( reo_man * p, DdManager * dd, DdNode * Func );
//    reo_man * pReo;

    ProgressBar * pProgress;
    Abc_Ntk_t * pNtkNew;
    Abc_Obj_t * pNode, * pDriver, * pNodeNew;
//    DdManager * dd = pNtk->pManGlob;
    DdManager * dd = (DdManager *)Abc_NtkGlobalBddMan( pNtk );
    int i;

//    pReo = Extra_ReorderInit( Abc_NtkCiNum(pNtk), 1000 );
//    runtime1 = runtime2 = 0;

    // start the new network
    pNtkNew = Abc_NtkStartFrom( pNtk, ABC_NTK_LOGIC, ABC_FUNC_BDD );
    // make sure the new manager has the same number of inputs
    Cudd_bddIthVar( (DdManager *)pNtkNew->pManFunc, dd->size-1 );
    // process the POs
    pProgress = Extra_ProgressBarStart( stdout, Abc_NtkCoNum(pNtk) );
    Abc_NtkForEachCo( pNtk, pNode, i )
    {
        Extra_ProgressBarUpdate( pProgress, i, NULL );
        pDriver = Abc_ObjFanin0(pNode);
        if ( Abc_ObjIsCi(pDriver) && !strcmp(Abc_ObjName(pNode), Abc_ObjName(pDriver)) )
        {
            Abc_ObjAddFanin( pNode->pCopy, pDriver->pCopy );
            continue;
        }
//        pNodeNew = Abc_NodeFromGlobalBdds( pNtkNew, dd, Vec_PtrEntry(pNtk->vFuncsGlob, i) );
        pNodeNew = Abc_NodeFromGlobalBdds( pNtkNew, dd, (DdNode *)Abc_ObjGlobalBdd(pNode) );
        Abc_ObjAddFanin( pNode->pCopy, pNodeNew );

//        Extra_ShuffleTest( pReo, dd, Abc_ObjGlobalBdd(pNode) );

    }
    Extra_ProgressBarStop( pProgress );

//    Extra_ReorderQuit( pReo );
//ABC_PRT( "Reo ", runtime1 );
//ABC_PRT( "Cudd", runtime2 );

    return pNtkNew;
}

/**Function*************************************************************

  Synopsis    [Derives the network with the given global BDD.]

  Description []
               
  SideEffects []

  SeeAlso     []

***********************************************************************/
Abc_Obj_t * Abc_NodeFromGlobalBdds( Abc_Ntk_t * pNtkNew, DdManager * dd, DdNode * bFunc )
{
    Abc_Obj_t * pNodeNew, * pTemp;
    int i;
    // create a new node
    pNodeNew = Abc_NtkCreateNode( pNtkNew );
    // add the fanins in the order, in which they appear in the reordered manager
    Abc_NtkForEachCi( pNtkNew, pTemp, i )
        Abc_ObjAddFanin( pNodeNew, Abc_NtkCi(pNtkNew, dd->invperm[i]) );
    // transfer the function
    pNodeNew->pData = Extra_TransferLevelByLevel( dd, (DdManager *)pNtkNew->pManFunc, bFunc );  Cudd_Ref( (DdNode *)pNodeNew->pData );
    return pNodeNew;
}


////////////////////////////////////////////////////////////////////////
///                       END OF FILE                                ///
////////////////////////////////////////////////////////////////////////


ABC_NAMESPACE_IMPL_END