/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManDetectSeqSignals( Gia_Man_t * p, int fSetReset, int fVerbose )
{
Vec_Int_t * vSuper;
Gia_Obj_t * pFlop, * pObjC, * pObj0, * pObj1, * pNode, * pTemp;
int i, k, Ent, * pSets, * pResets, * pEnables;
int nHaveSetReset = 0, nHaveEnable = 0;
assert( Gia_ManRegNum(p) > 0 );
pSets = ABC_CALLOC( int, Gia_ManObjNum(p) );
pResets = ABC_CALLOC( int, Gia_ManObjNum(p) );
pEnables = ABC_CALLOC( int, Gia_ManObjNum(p) );
vSuper = Vec_IntAlloc( 100 );
Gia_ManForEachRi( p, pFlop, i )
{
pNode = Gia_ObjFanin0(pFlop);
if ( !Gia_ObjIsAnd(pNode) )
continue;
// detect sets/resets
Gia_CollectSuper( p, pNode, vSuper );
if ( Gia_ObjFaninC0(pFlop) )
Vec_IntForEachEntry( vSuper, Ent, k )
pSets[Ent]++;
else
Vec_IntForEachEntry( vSuper, Ent, k )
pResets[Ent]++;
// detect enables
if ( !Gia_ObjIsMuxType(pNode) )
continue;
pObjC = Gia_ObjRecognizeMux( pNode, &pObj0, &pObj1 );
pTemp = Gia_ObjRiToRo( p, pFlop );
if ( Gia_Regular(pObj0) != pTemp && Gia_Regular(pObj1) != pTemp )
continue;
if ( !Gia_ObjFaninC0(pFlop) )
{
pObj0 = Gia_Not(pObj0);
pObj1 = Gia_Not(pObj1);
}
if ( Gia_IsComplement(pObjC) )
{
pObjC = Gia_Not(pObjC);
pTemp = pObj0;
pObj0 = pObj1;
pObj1 = pTemp;
}
// detect controls
// Gia_CollectSuper( p, pObjC, vSuper );
// Vec_IntForEachEntry( vSuper, Ent, k )
// pEnables[Ent]++;
pEnables[Gia_ObjId(p, pObjC)]++;
nHaveEnable++;
}
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Derives GIA with MUXes.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_Man_t * Gia_ManTisDupMuxes( Gia_Man_t * p )
{
Gia_Man_t * pNew, * pTemp;
Gia_Obj_t * pObj, * pFan0, * pFan1, * pFanC;
int i;
assert( p->pMuxes == NULL );
ABC_FREE( p->pRefs );
Gia_ManCreateRefs( p );
// start the new manager
pNew = Gia_ManStart( 5000 );
pNew->pName = Abc_UtilStrsav( p->pName );
pNew->pSpec = Abc_UtilStrsav( p->pSpec );
pNew->pMuxes = ABC_CALLOC( unsigned, pNew->nObjsAlloc );
// create constant
Gia_ManConst0(p)->Value = 0;
// create PIs
Gia_ManForEachCi( p, pObj, i )
pObj->Value = Gia_ManAppendCi( pNew );
// create internal nodes
Gia_ManHashStart( pNew );
Gia_ManForEachAnd( p, pObj, i )
{
if ( !Gia_ObjIsMuxType(pObj) || (Gia_ObjRefNum(p, Gia_ObjFanin0(pObj)) > 1 && Gia_ObjRefNum(p, Gia_ObjFanin1(pObj)) > 1) )
pObj->Value = Gia_ManHashAnd( pNew, Gia_ObjFanin0Copy(pObj), Gia_ObjFanin1Copy(pObj) );
else if ( Gia_ObjRecognizeExor(pObj, &pFan0, &pFan1) )
pObj->Value = Gia_ManHashXorReal( pNew, Gia_ObjLitCopy(p, Gia_ObjToLit(p, pFan0)), Gia_ObjLitCopy(p, Gia_ObjToLit(p, pFan1)) );
else
{
pFanC = Gia_ObjRecognizeMux( pObj, &pFan1, &pFan0 );
pObj->Value = Gia_ManHashMuxReal( pNew, Gia_ObjLitCopy(p, Gia_ObjToLit(p, pFanC)), Gia_ObjLitCopy(p, Gia_ObjToLit(p, pFan1)), Gia_ObjLitCopy(p, Gia_ObjToLit(p, pFan0)) );
}
}
Gia_ManHashStop( pNew );
// create ROs
Gia_ManForEachCo( p, pObj, i )
pObj->Value = Gia_ManAppendCo( pNew, Gia_ObjFanin0Copy(pObj) );
Gia_ManSetRegNum( pNew, Gia_ManRegNum(p) );
// perform cleanup
pNew = Gia_ManCleanup( pTemp = pNew );
Gia_ManStop( pTemp );
return pNew;
}
/**Function*************************************************************
Synopsis [Addes clauses to the solver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static void Gia_ManAddClausesMux( Ssc_Man_t * p, Gia_Obj_t * pNode )
{
Gia_Obj_t * pNodeI, * pNodeT, * pNodeE;
int pLits[4], LitF, LitI, LitT, LitE, RetValue;
assert( !Gia_IsComplement( pNode ) );
assert( Gia_ObjIsMuxType( pNode ) );
// get nodes (I = if, T = then, E = else)
pNodeI = Gia_ObjRecognizeMux( pNode, &pNodeT, &pNodeE );
// get the Litiable numbers
LitF = Ssc_ObjSatLit( p, Gia_Obj2Lit(p->pFraig,pNode) );
LitI = Ssc_ObjSatLit( p, Gia_Obj2Lit(p->pFraig,pNodeI) );
LitT = Ssc_ObjSatLit( p, Gia_Obj2Lit(p->pFraig,pNodeT) );
LitE = Ssc_ObjSatLit( p, Gia_Obj2Lit(p->pFraig,pNodeE) );
// f = ITE(i, t, e)
// i' + t' + f
// i' + t + f'
// i + e' + f
// i + e + f'
// create four clauses
pLits[0] = Abc_LitNotCond(LitI, 1);
pLits[1] = Abc_LitNotCond(LitT, 1);
pLits[2] = Abc_LitNotCond(LitF, 0);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = Abc_LitNotCond(LitI, 1);
pLits[1] = Abc_LitNotCond(LitT, 0);
pLits[2] = Abc_LitNotCond(LitF, 1);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = Abc_LitNotCond(LitI, 0);
pLits[1] = Abc_LitNotCond(LitE, 1);
pLits[2] = Abc_LitNotCond(LitF, 0);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = Abc_LitNotCond(LitI, 0);
pLits[1] = Abc_LitNotCond(LitE, 0);
pLits[2] = Abc_LitNotCond(LitF, 1);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
// two additional clauses
// t' & e' -> f'
// t & e -> f
// t + e + f'
// t' + e' + f
if ( LitT == LitE )
{
// assert( fCompT == !fCompE );
return;
}
pLits[0] = Abc_LitNotCond(LitT, 0);
pLits[1] = Abc_LitNotCond(LitE, 0);
pLits[2] = Abc_LitNotCond(LitF, 1);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = Abc_LitNotCond(LitT, 1);
pLits[1] = Abc_LitNotCond(LitE, 1);
pLits[2] = Abc_LitNotCond(LitF, 0);
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
}
/**Function*************************************************************
Synopsis [Addes clauses to the solver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cec_AddClausesMux( Cec_ManSat_t * p, Gia_Obj_t * pNode )
{
Gia_Obj_t * pNodeI, * pNodeT, * pNodeE;
int pLits[4], RetValue, VarF, VarI, VarT, VarE, fCompT, fCompE;
assert( !Gia_IsComplement( pNode ) );
assert( Gia_ObjIsMuxType( pNode ) );
// get nodes (I = if, T = then, E = else)
pNodeI = Gia_ObjRecognizeMux( pNode, &pNodeT, &pNodeE );
// get the variable numbers
VarF = Cec_ObjSatNum(p,pNode);
VarI = Cec_ObjSatNum(p,pNodeI);
VarT = Cec_ObjSatNum(p,Gia_Regular(pNodeT));
VarE = Cec_ObjSatNum(p,Gia_Regular(pNodeE));
// get the complementation flags
fCompT = Gia_IsComplement(pNodeT);
fCompE = Gia_IsComplement(pNodeE);
// f = ITE(i, t, e)
// i' + t' + f
// i' + t + f'
// i + e' + f
// i + e + f'
// create four clauses
pLits[0] = toLitCond(VarI, 1);
pLits[1] = toLitCond(VarT, 1^fCompT);
pLits[2] = toLitCond(VarF, 0);
if ( p->pPars->fPolarFlip )
{
if ( pNodeI->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeT)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = toLitCond(VarI, 1);
pLits[1] = toLitCond(VarT, 0^fCompT);
pLits[2] = toLitCond(VarF, 1);
if ( p->pPars->fPolarFlip )
{
if ( pNodeI->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeT)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = toLitCond(VarI, 0);
pLits[1] = toLitCond(VarE, 1^fCompE);
pLits[2] = toLitCond(VarF, 0);
if ( p->pPars->fPolarFlip )
{
if ( pNodeI->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = toLitCond(VarI, 0);
pLits[1] = toLitCond(VarE, 0^fCompE);
pLits[2] = toLitCond(VarF, 1);
if ( p->pPars->fPolarFlip )
{
if ( pNodeI->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
// two additional clauses
// t' & e' -> f'
// t & e -> f
// t + e + f'
// t' + e' + f
if ( VarT == VarE )
{
// assert( fCompT == !fCompE );
return;
}
pLits[0] = toLitCond(VarT, 0^fCompT);
pLits[1] = toLitCond(VarE, 0^fCompE);
pLits[2] = toLitCond(VarF, 1);
if ( p->pPars->fPolarFlip )
{
if ( Gia_Regular(pNodeT)->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
pLits[0] = toLitCond(VarT, 1^fCompT);
pLits[1] = toLitCond(VarE, 1^fCompE);
pLits[2] = toLitCond(VarF, 0);
if ( p->pPars->fPolarFlip )
{
if ( Gia_Regular(pNodeT)->fPhase ) pLits[0] = lit_neg( pLits[0] );
if ( Gia_Regular(pNodeE)->fPhase ) pLits[1] = lit_neg( pLits[1] );
if ( pNode->fPhase ) pLits[2] = lit_neg( pLits[2] );
}
RetValue = sat_solver_addclause( p->pSat, pLits, pLits + 3 );
assert( RetValue );
}
