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Enabling ISOP-based minimization in 'collapse' if EXDC is available.

This commit is contained in:
Alan Mishchenko 2014-08-04 10:53:08 -07:00
parent 82aec90c6c
commit 1d9d6814ee
2 changed files with 35 additions and 2 deletions
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35
src/base/abci/abcCollapse.c
View File

@ -117,6 +117,40 @@ Abc_Ntk_t * Abc_NtkFromGlobalBdds( Abc_Ntk_t * pNtk )
DdManager * dd = (DdManager *)Abc_NtkGlobalBddMan( pNtk );
int i;
// extract don't-care and compute ISOP
if ( pNtk->pExdc )
{
DdManager * ddExdc = NULL;
DdNode * bBddMin, * bBddDc, * bBddL, * bBddU;
assert( Abc_NtkIsStrash(pNtk->pExdc) );
assert( Abc_NtkCoNum(pNtk->pExdc) == 1 );
// compute the global BDDs
if ( Abc_NtkBuildGlobalBdds(pNtk->pExdc, 10000000, 1, 1, 0) == NULL )
return NULL;
// transfer tot the same manager
ddExdc = (DdManager *)Abc_NtkGlobalBddMan( pNtk->pExdc );
bBddDc = (DdNode *)Abc_ObjGlobalBdd(Abc_NtkCo(pNtk->pExdc, 0));
bBddDc = Cudd_bddTransfer( ddExdc, dd, bBddDc ); Cudd_Ref( bBddDc );
Abc_NtkFreeGlobalBdds( pNtk->pExdc, 1 );
// minimize the output
Abc_NtkForEachCo( pNtk, pNode, i )
{
bBddMin = (DdNode *)Abc_ObjGlobalBdd(pNode);
// derive lower and uppwer bound
bBddL = Cudd_bddAnd( dd, bBddMin, Cudd_Not(bBddDc) ); Cudd_Ref( bBddL );
bBddU = Cudd_bddAnd( dd, Cudd_Not(bBddMin), Cudd_Not(bBddDc) ); Cudd_Ref( bBddU );
Cudd_RecursiveDeref( dd, bBddMin );
// compute new one
bBddMin = Cudd_bddIsop( dd, bBddL, Cudd_Not(bBddU) ); Cudd_Ref( bBddMin );
Cudd_RecursiveDeref( dd, bBddL );
Cudd_RecursiveDeref( dd, bBddU );
// update global BDD
Abc_ObjSetGlobalBdd( pNode, bBddMin );
//Extra_bddPrint( dd, bBddMin ); printf( "\n" );
}
Cudd_RecursiveDeref( dd, bBddDc );
}
// pReo = Extra_ReorderInit( Abc_NtkCiNum(pNtk), 1000 );
// runtime1 = runtime2 = 0;
@ -176,7 +210,6 @@ Abc_Obj_t * Abc_NodeFromGlobalBdds( Abc_Ntk_t * pNtkNew, DdManager * dd, DdNode
return pNodeNew;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////

2
src/base/abci/abcStrash.c
View File

@ -293,7 +293,7 @@ Abc_Ntk_t * Abc_NtkStrash( Abc_Ntk_t * pNtk, int fAllNodes, int fCleanup, int fR
// printf( "Warning: AIG cleanup removed %d nodes (this is not a bug).\n", nNodes );
// duplicate EXDC
if ( pNtk->pExdc )
pNtkAig->pExdc = Abc_NtkDup( pNtk->pExdc );
pNtkAig->pExdc = Abc_NtkStrash( pNtk->pExdc, fAllNodes, fCleanup, fRecord );
// make sure everything is okay
if ( !Abc_NtkCheck( pNtkAig ) )
{