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Graph isomorphism checking code.

This commit is contained in:
Alan Mishchenko 2012-02-02 15:45:48 -08:00
parent 16fd67f0ab
commit 25859eefb6
2 changed files with 125 additions and 43 deletions
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154
src/aig/aig/aigIso.c
View File

@ -33,13 +33,15 @@ typedef struct Iso_Obj_t_ Iso_Obj_t;
struct Iso_Obj_t_
{
// hashing entries (related to the parameter ISO_NUM_INTS!)
unsigned fFlop : 1;
unsigned nFinPos : 2;
unsigned nFoutPos : 29;
unsigned fMux : 1;
unsigned nFinNeg : 2;
unsigned nFoutNeg : 29;
int Level;
unsigned fFlop : 1;
unsigned fMux : 1;
unsigned nFinPos : 2;
unsigned nFoutPos : 28;
unsigned fCLow : 1;
unsigned fCHigh : 1;
unsigned nFinNeg : 2;
unsigned nFoutNeg : 28;
// other data
int iNext; // hash table entry
int iClass; // next one in class
@ -174,6 +176,36 @@ void Iso_ManStop( Iso_Man_t * p )
}
/**Function*************************************************************
Synopsis [Compares two objects by their signature.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Iso_ObjCompareBasic( Iso_Obj_t * pIso1, Iso_Obj_t * pIso2 )
{
int fCLow1, fCLow2, fCHigh1, fCHigh2, Diff;
fCLow1 = pIso1->fCLow; pIso1->fCLow = 0;
fCLow2 = pIso2->fCLow; pIso2->fCLow = 0;
fCHigh1 = pIso1->fCHigh; pIso1->fCHigh = 0;
fCHigh2 = pIso2->fCHigh; pIso2->fCHigh = 0;
Diff = memcmp( pIso1, pIso2, sizeof(int) * ISO_NUM_INTS );
pIso1->fCLow = fCLow1;
pIso2->fCLow = fCLow2;
pIso1->fCHigh = fCHigh1;
pIso2->fCHigh = fCHigh2;
return -Diff;
}
/**Function*************************************************************
Synopsis [Compares two objects by their signature.]
@ -191,17 +223,17 @@ int Iso_ObjCompare( Iso_Obj_t ** pp1, Iso_Obj_t ** pp2 )
Iso_Obj_t * pIso2 = *pp2;
int Diff = memcmp( pIso1, pIso2, sizeof(int) * ISO_NUM_INTS );
if ( Diff )
return Diff;
return -Diff;
// return 0;
if ( pIso1->vAllies == NULL && pIso2->vAllies == NULL )
return 0;
if ( pIso1->vAllies == NULL && pIso2->vAllies != NULL )
return -1;
if ( pIso1->vAllies != NULL && pIso2->vAllies == NULL )
return 1;
if ( pIso1->vAllies != NULL && pIso2->vAllies == NULL )
return -1;
Diff = Vec_IntSize(pIso1->vAllies) - Vec_IntSize(pIso2->vAllies);
if ( Diff )
return Diff;
return -Diff;
return memcmp( Vec_IntArray(pIso1->vAllies), Vec_IntArray(pIso2->vAllies), Vec_IntSize(pIso1->vAllies) * sizeof(int) );
}
@ -319,6 +351,26 @@ Iso_Man_t * Iso_ManCreate( Aig_Man_t * pAig )
pIso->nFinNeg = Aig_ObjFaninC0(pObj) + Aig_ObjFaninC1(pObj);
pIso->nFinPos = 2 - pIso->nFinNeg;
pIso->fMux = Aig_ObjIsMuxType( pObj );
if ( Aig_ObjFaninC0(pObj) != Aig_ObjFaninC1(pObj) )
{
// fanins are already assigned!!!
if ( Aig_ObjFaninC0(pObj) )
{
int Diff = Iso_ObjCompareBasic( Iso_ManObj(p,Aig_ObjFaninId0(pObj)), Iso_ManObj(p,Aig_ObjFaninId1(pObj)) );
if ( Diff < 0 )
pIso->fCLow = 1;
else if ( Diff > 0 )
pIso->fCHigh = 1;
}
else
{
int Diff = Iso_ObjCompareBasic( Iso_ManObj(p,Aig_ObjFaninId1(pObj)), Iso_ManObj(p,Aig_ObjFaninId0(pObj)) );
if ( Diff < 0 )
pIso->fCLow = 1;
else if ( Diff > 0 )
pIso->fCHigh = 1;
}
}
}
else
pIso->fFlop = (int)(Aig_ObjPioNum(pObj) >= Aig_ManPiNum(pAig) - Aig_ManRegNum(pAig));
@ -351,7 +403,7 @@ void Iso_ManCollectClasses( Iso_Man_t * p )
for ( i = 0; i < p->nBins; i++ )
for ( pIso = Iso_ManObj(p, p->pBins[i]); pIso; pIso = Iso_ManObj(p, pIso->iNext) )
{
assert( pIso->Id == 0 );
// assert( pIso->Id == 0 );
if ( pIso->iClass )
Vec_PtrPush( p->vClasses, pIso );
else
@ -374,10 +426,9 @@ void Iso_ManCollectClasses( Iso_Man_t * p )
SeeAlso []
***********************************************************************/
void Iso_ManPrintClasses( Iso_Man_t * p, int fVerbose )
void Iso_ManPrintClasses( Iso_Man_t * p, int fVerbose, int fVeryVerbose )
{
int fOnlyCis = 1;
int fVeryVerbose = 0;
int fOnlyCis = 0;
Iso_Obj_t * pIso, * pTemp;
int i;
@ -403,7 +454,15 @@ void Iso_ManPrintClasses( Iso_Man_t * p, int fVerbose )
if ( fOnlyCis )
printf( " %d", Aig_ObjPioNum(Aig_ManObj(p->pAig, Iso_ObjId(p, pTemp))) );
else
printf( " %d", Iso_ObjId(p, pTemp) );
{
Aig_Obj_t * pObj = Aig_ManObj(p->pAig, Iso_ObjId(p, pTemp));
if ( Aig_ObjIsNode(pObj) )
printf( " %d{%s%d(%d),%s%d(%d)}", Iso_ObjId(p, pTemp),
Aig_ObjFaninC0(pObj)? "-": "+", Aig_ObjFaninId0(pObj), Aig_ObjLevel(Aig_ObjFanin0(pObj)),
Aig_ObjFaninC1(pObj)? "-": "+", Aig_ObjFaninId1(pObj), Aig_ObjLevel(Aig_ObjFanin1(pObj)) );
else
printf( " %d", Iso_ObjId(p, pTemp) );
}
printf( "(%d,%d,%d)", pTemp->Level, pTemp->nFoutPos, pTemp->nFoutNeg );
if ( pTemp->vAllies )
{
@ -636,7 +695,7 @@ Vec_Int_t * Iso_ManFindPerm( Aig_Man_t * pAig, int fVerbose )
Vec_Int_t * vRes;
int i;
p = Iso_ManCreate( pAig );
Iso_ManPrintClasses( p, fVerbose );
Iso_ManPrintClasses( p, fVerbose, 0 );
while ( p->nSingles )
{
// collect singletons and classes
@ -651,8 +710,27 @@ Vec_Int_t * Iso_ManFindPerm( Aig_Man_t * pAig, int fVerbose )
Iso_ManAssignAdjacency( p );
// rehash the class nodes
Iso_ManRehashClassNodes( p );
Iso_ManPrintClasses( p, fVerbose );
Iso_ManPrintClasses( p, fVerbose, 0 );
if ( p->nSingles == 0 )
{
// assign ID to the first class
pIso = (Iso_Obj_t *)Vec_PtrEntry( p->vClasses, 0 );
assert( pIso->Id == 0 );
pIso->Id = p->nObjIds++;
// assign adjacency to classes
Iso_ManAssignAdjacency( p );
// rehash the class nodes
Iso_ManRehashClassNodes( p );
Iso_ManPrintClasses( p, fVerbose, 0 );
if ( p->nSingles == 0 )
{
pIso->Id = 0;
p->nObjIds--;
}
}
}
// Iso_ManPrintClasses( p, fVerbose, 1 );
vRes = Iso_ManFinalize( p );
Iso_ManStop( p );
return vRes;
@ -766,24 +844,6 @@ Vec_Int_t * Iso_ManFindMapping( Aig_Man_t * pAig1, Aig_Man_t * pAig2, Vec_Int_t
return vInvPerm2;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Iso_ManTestOne( Aig_Man_t * pAig, int fVerbose )
{
Vec_Int_t * vPerm;
vPerm = Iso_ManFindPerm( pAig, fVerbose );
Vec_IntFree( vPerm );
}
#include "src/aig/saig/saig.h"
@ -886,7 +946,7 @@ Aig_Man_t * Iso_ManFilterPos( Aig_Man_t * pAig, int fVerbose )
SeeAlso []
***********************************************************************/
void Iso_ManTestOld( Aig_Man_t * pAig1, int fVerbose )
Aig_Man_t * Iso_ManTest( Aig_Man_t * pAig1, int fVerbose )
{
extern Aig_Man_t * Abc_NtkToDar( Abc_Ntk_t * pNtk, int fExors, int fRegisters );
extern Abc_Ntk_t * Abc_NtkFromAigPhase( Aig_Man_t * pMan );
@ -911,6 +971,7 @@ void Iso_ManTestOld( Aig_Man_t * pAig1, int fVerbose )
else
printf( "Mapping of AIGs is NOT found.\n" );
Vec_IntFreeP( &vMap );
return NULL;
}
/**Function*************************************************************
@ -924,7 +985,7 @@ void Iso_ManTestOld( Aig_Man_t * pAig1, int fVerbose )
SeeAlso []
***********************************************************************/
Aig_Man_t * Iso_ManTest( Aig_Man_t * pAig, int fVerbose )
Aig_Man_t * Iso_ManTest666( Aig_Man_t * pAig, int fVerbose )
{
Aig_Man_t * pPart;
int clk = clock();
@ -935,6 +996,25 @@ Aig_Man_t * Iso_ManTest( Aig_Man_t * pAig, int fVerbose )
return pPart;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Aig_Man_t * Iso_ManTest777( Aig_Man_t * pAig, int fVerbose )
{
Vec_Int_t * vPerm;
vPerm = Iso_ManFindPerm( pAig, fVerbose );
Vec_IntFree( vPerm );
return NULL;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////

14
src/base/abci/abc.c
View File

@ -8850,13 +8850,15 @@ int Abc_CommandTest( Abc_Frame_t * pAbc, int argc, char ** argv )
// Aig_SupportSizeTest( pAig );
pRes = Iso_ManTest( pAig, fVerbose );
Aig_ManStop( pAig );
if ( pRes != NULL )
{
pNtkRes = Abc_NtkFromAigPhase( pRes );
Aig_ManStop( pRes );
pNtkRes = Abc_NtkFromAigPhase( pRes );
Aig_ManStop( pRes );
ABC_FREE( pNtkRes->pName );
pNtkRes->pName = Extra_UtilStrsav(pNtk->pName);
Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
ABC_FREE( pNtkRes->pName );
pNtkRes->pName = Extra_UtilStrsav(pNtk->pName);
Abc_FrameReplaceCurrentNetwork( pAbc, pNtkRes );
}
}
}