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Experiments with precomputation and matching.

This commit is contained in:
Alan Mishchenko 2015-10-16 10:36:53 -07:00
parent 40bb7089da
commit 8268553369
2 changed files with 71 additions and 38 deletions
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89
src/opt/sfm/sfmDec.c
View File

@ -138,15 +138,15 @@ static inline word Sfm_DecObjSim2( Sfm_Dec_t * p, Abc_Obj_t * pObj ) { r
void Sfm_ParSetDefault3( Sfm_Par_t * pPars )
{
memset( pPars, 0, sizeof(Sfm_Par_t) );
pPars->nTfoLevMax = 1000; // the maximum fanout levels
pPars->nTfiLevMax = 1000; // the maximum fanin levels
pPars->nTfoLevMax = 100; // the maximum fanout levels
pPars->nTfiLevMax = 100; // the maximum fanin levels
pPars->nFanoutMax = 30; // the maximum number of fanoutsp
pPars->nMffcMin = 1; // the maximum MFFC size
pPars->nMffcMax = 3; // the maximum MFFC size
pPars->nDecMax = 1; // the maximum number of decompositions
pPars->nWinSizeMax = 300; // the maximum window size
pPars->nWinSizeMax = 0; // the maximum window size
pPars->nGrowthLevel = 0; // the maximum allowed growth in level
pPars->nBTLimit = 5000; // the maximum number of conflicts in one SAT run
pPars->nBTLimit = 0; // the maximum number of conflicts in one SAT run
pPars->fUseAndOr = 0; // enable internal detection of AND/OR gates
pPars->fZeroCost = 0; // enable zero-cost replacement
pPars->fUseSim = 0; // enable simulation
@ -516,7 +516,7 @@ void Sfm_DecPrint( Sfm_Dec_t * p, word * Masks )
int Sfm_DecPeformDecOne( Sfm_Dec_t * p, int * pfConst )
{
int fVerbose = p->pPars->fVeryVerbose;
int nBTLimit = 0;
int nBTLimit = p->pPars->nBTLimit;
int i, k, c, Entry, status, Lits[3], RetValue;
int iLitBest = -1, iCBest = -1, CostMin = ABC_INFINITY, Cost;
abctime clk;
@ -569,7 +569,10 @@ int Sfm_DecPeformDecOne( Sfm_Dec_t * p, int * pfConst )
clk = Abc_Clock();
status = sat_solver_solve( p->pSat, Lits, Lits + 2, nBTLimit, 0, 0, 0 );
if ( status == l_Undef )
return 0;
{
p->nTimeOuts++;
return -2;
}
if ( status == l_False )
{
p->nSatCallsUnsat++;
@ -749,7 +752,7 @@ int Sfm_DecCombineDec( Sfm_Dec_t * p, word * pTruth0, word * pTruth1, int * pSup
}
int Sfm_DecPeformDec_rec( Sfm_Dec_t * p, word * pTruth, int * pSupp, int * pAssump, int nAssump, word Masks[2], int fCofactor )
{
int nBTLimit = 0;
int nBTLimit = p->pPars->nBTLimit;
// int fVerbose = p->pPars->fVeryVerbose;
int c, i, d, Var, iLit, CostMin, Cost, status;
abctime clk;
@ -784,7 +787,10 @@ int Sfm_DecPeformDec_rec( Sfm_Dec_t * p, word * pTruth, int * pSupp, int * pAssu
clk = Abc_Clock();
status = sat_solver_solve( p->pSat, pAssump, pAssump + nAssump + 1, nBTLimit, 0, 0, 0 );
if ( status == l_Undef )
{
p->nTimeOuts++;
return -2;
}
if ( status == l_False )
{
p->nSatCallsUnsat++;
@ -823,7 +829,10 @@ int Sfm_DecPeformDec_rec( Sfm_Dec_t * p, word * pTruth, int * pSupp, int * pAssu
clk = Abc_Clock();
status = sat_solver_solve( p->pSat, pAssump, pAssump + nAssump + 2, nBTLimit, 0, 0, 0 );
if ( status == l_Undef )
{
p->nTimeOuts++;
return -2;
}
if ( status == l_False )
{
p->nSatCallsUnsat++;
@ -864,7 +873,10 @@ int Sfm_DecPeformDec_rec( Sfm_Dec_t * p, word * pTruth, int * pSupp, int * pAssu
clk = Abc_Clock();
status = sat_solver_solve( p->pSat, pAssump, pAssump + nAssump + 2, nBTLimit, 0, 0, 0 );
if ( status == l_Undef )
{
p->nTimeOuts++;
return -2;
}
if ( status == l_False )
{
p->nSatCallsUnsat++;
@ -918,7 +930,10 @@ int Sfm_DecPeformDec_rec( Sfm_Dec_t * p, word * pTruth, int * pSupp, int * pAssu
clk = Abc_Clock();
status = sat_solver_solve( p->pSat, pAssump, pAssump + nAssump+1+i, nBTLimit, 0, 0, 0 );
if ( status == l_Undef )
{
p->nTimeOuts++;
return -2;
}
if ( status == l_False )
{
int * pFinal, nFinal = sat_solver_final( p->pSat, &pFinal );
@ -1407,7 +1422,7 @@ void Sfm_DecInsert( Abc_Ntk_t * pNtk, Abc_Obj_t * pPivot, int Limit, Vec_Int_t *
// swap fanins
if ( iFanin != iFaninNew )
{
int * pArray = Vec_IntArray( &pFanout->vFanouts );
int * pArray = Vec_IntArray( &pFanout->vFanins );
ABC_SWAP( int, pArray[iFanin], pArray[iFaninNew] );
}
}
@ -1486,18 +1501,31 @@ void Abc_NtkPerformMfs3( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars )
Abc_Obj_t * pObj;
abctime clk;
int i = 0, Limit, RetValue, nStop = Abc_NtkObjNumMax(pNtk);
printf( "Remapping parameters: " );
printf( "TFO = %d. ", pPars->nTfoLevMax );
printf( "TFI = %d. ", pPars->nTfiLevMax );
printf( "FanMax = %d. ", pPars->nFanoutMax );
printf( "MffcMin = %d. ", pPars->nMffcMin );
printf( "MffcMax = %d. ", pPars->nMffcMax );
printf( "DecMax = %d. ", pPars->nDecMax );
printf( "Sim = %s. ", pPars->fUseSim ? "yes" : "no" );
printf( "0-cost = %s. ", pPars->fZeroCost ? "yes" : "no" );
if ( pPars->iNodeOne )
printf( "Pivot = %d. ", pPars->iNodeOne );
printf( "\n" );
if ( pPars->fVerbose )
{
printf( "Remapping parameters: " );
if ( pPars->nTfoLevMax )
printf( "TFO = %d. ", pPars->nTfoLevMax );
if ( pPars->nTfiLevMax )
printf( "TFI = %d. ", pPars->nTfiLevMax );
if ( pPars->nFanoutMax )
printf( "FanMax = %d. ", pPars->nFanoutMax );
if ( pPars->nWinSizeMax )
printf( "WinMax = %d. ", pPars->nWinSizeMax );
if ( pPars->nBTLimit )
printf( "Confl = %d. ", pPars->nBTLimit );
if ( pPars->nMffcMin )
printf( "MffcMin = %d. ", pPars->nMffcMin );
if ( pPars->nMffcMax )
printf( "MffcMax = %d. ", pPars->nMffcMax );
if ( pPars->nDecMax )
printf( "DecMax = %d. ", pPars->nDecMax );
if ( pPars->iNodeOne )
printf( "Pivot = %d. ", pPars->iNodeOne );
printf( "Sim = %s. ", pPars->fUseSim ? "yes" : "no" );
printf( "0-cost = %s. ", pPars->fZeroCost ? "yes" : "no" );
printf( "\n" );
}
// enter library
assert( Abc_NtkIsMappedLogic(pNtk) );
Sfm_LibPreprocess( pLib, &p->vGateSizes, &p->vGateFuncs, &p->vGateCnfs, &p->vGateHands );
@ -1505,14 +1533,17 @@ void Abc_NtkPerformMfs3( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars )
p->GateConst1 = Mio_GateReadValue( Mio_LibraryReadConst1(pLib) );
p->GateBuffer = Mio_GateReadValue( Mio_LibraryReadBuf(pLib) );
p->GateInvert = Mio_GateReadValue( Mio_LibraryReadInv(pLib) );
p->GateAnd[0] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and00", NULL) );
p->GateAnd[1] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and01", NULL) );
p->GateAnd[2] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and10", NULL) );
p->GateAnd[3] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and11", NULL) );
p->GateOr[0] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or00", NULL) );
p->GateOr[1] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or01", NULL) );
p->GateOr[2] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or10", NULL) );
p->GateOr[3] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or11", NULL) );
if ( pPars->fRrOnly )
{
p->GateAnd[0] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and00", NULL) );
p->GateAnd[1] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and01", NULL) );
p->GateAnd[2] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and10", NULL) );
p->GateAnd[3] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "and11", NULL) );
p->GateOr[0] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or00", NULL) );
p->GateOr[1] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or01", NULL) );
p->GateOr[2] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or10", NULL) );
p->GateOr[3] = Mio_GateReadValue( Mio_LibraryReadGateByName(pLib, "or11", NULL) );
}
if ( pPars->fVerbose )
p->nTotalNodesBeg = Abc_NtkNodeNum(pNtk);
if ( pPars->fVerbose )
@ -1535,6 +1566,8 @@ void Abc_NtkPerformMfs3( Abc_Ntk_t * pNtk, Sfm_Par_t * pPars )
clk = Abc_Clock();
p->nDivs = Sfm_DecExtract( pNtk, pPars, pObj, &p->vObjRoots, &p->vObjGates, &p->vObjFanins, &p->vObjMap, &p->vTemp, &p->vTemp2, &p->vObjMffc, &p->vObjInMffc );
p->timeWin += Abc_Clock() - clk;
if ( pPars->nWinSizeMax && pPars->nWinSizeMax < Vec_IntSize(&p->vObjGates) )
continue;
p->nMffc = Vec_IntSize(&p->vObjMffc);
p->AreaMffc = Sfm_DecMffcArea(pNtk, &p->vObjMffc);
p->nMaxDivs = Abc_MaxInt( p->nMaxDivs, p->nDivs );

20
src/opt/sfm/sfmLib.c
View File

@ -138,28 +138,28 @@ void Sfm_LibPreprocess( Mio_Library_t * pLib, Vec_Int_t * vGateSizes, Vec_Wrd_t
***********************************************************************/
int Sfm_LibFindComplInputGate( Vec_Wrd_t * vFuncs, int iGate, int nFanins, int iFanin, int * piFaninNew )
{
word uTruthGate = Vec_WrdEntry(vFuncs, iGate);
word uTruth, uTruthNew = Abc_Tt6Flip( uTruthGate, iFanin );
int i;
word uTruthGate = Vec_WrdEntry( vFuncs, iGate );
word uTruthFlip = Abc_Tt6Flip( uTruthGate, iFanin );
word uTruth, uTruthSwap; int i;
assert( iFanin >= 0 && iFanin < nFanins );
if ( piFaninNew ) *piFaninNew = iFanin;
Vec_WrdForEachEntry( vFuncs, uTruth, i )
if ( uTruth == uTruthNew )
if ( uTruth == uTruthFlip )
return i;
if ( iFanin-1 >= 0 && Abc_Tt6SwapAdjacent(uTruthGate, iFanin-1) == uTruthGate ) // symmetric with prev
if ( iFanin-1 >= 0 )
{
if ( piFaninNew ) *piFaninNew = iFanin-1;
uTruthNew = Abc_Tt6Flip( uTruthGate, iFanin-1 );
uTruthSwap = Abc_Tt6SwapAdjacent( uTruthFlip, iFanin-1 );
Vec_WrdForEachEntry( vFuncs, uTruth, i )
if ( uTruth == uTruthNew )
if ( uTruth == uTruthSwap )
return i;
}
if ( iFanin+1 < nFanins && Abc_Tt6SwapAdjacent(uTruthGate, iFanin) == uTruthGate ) // symmetric with next
if ( iFanin+1 < nFanins )
{
if ( piFaninNew ) *piFaninNew = iFanin+1;
uTruthNew = Abc_Tt6Flip( uTruthGate, iFanin+1 );
uTruthSwap = Abc_Tt6SwapAdjacent( uTruthFlip, iFanin );
Vec_WrdForEachEntry( vFuncs, uTruth, i )
if ( uTruth == uTruthNew )
if ( uTruth == uTruthSwap )
return i;
}
if ( piFaninNew ) *piFaninNew = -1;