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/**CFile****************************************************************
FileName [abcUnate.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcUnate.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "base/abc/abc.h"
#ifdef ABC_USE_CUDD
#include "bdd/extrab/extraBdd.h"
#endif
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#ifdef ABC_USE_CUDD
static void Abc_NtkPrintUnateBdd( Abc_Ntk_t * pNtk, int fUseNaive, int fVerbose );
static void Abc_NtkPrintUnateSat( Abc_Ntk_t * pNtk, int fVerbose );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Detects unate variables of the multi-output function.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkPrintUnate( Abc_Ntk_t * pNtk, int fUseBdds, int fUseNaive, int fVerbose )
{
if ( fUseBdds || fUseNaive )
Abc_NtkPrintUnateBdd( pNtk, fUseNaive, fVerbose );
else
Abc_NtkPrintUnateSat( pNtk, fVerbose );
}
/**Function*************************************************************
Synopsis [Detects unate variables using BDDs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkPrintUnateBdd( Abc_Ntk_t * pNtk, int fUseNaive, int fVerbose )
{
Abc_Obj_t * pNode;
Extra_UnateInfo_t * p;
DdManager * dd; // the BDD manager used to hold shared BDDs
// DdNode ** pbGlobal; // temporary storage for global BDDs
int TotalSupps = 0;
int TotalUnate = 0;
int i;
abctime clk = Abc_Clock();
abctime clkBdd, clkUnate;
// compute the global BDDs
dd = (DdManager *)Abc_NtkBuildGlobalBdds(pNtk, 10000000, 1, 1, fVerbose);
if ( dd == NULL )
return;
clkBdd = Abc_Clock() - clk;
// get information about the network
// dd = pNtk->pManGlob;
// dd = (DdManager *)Abc_NtkGlobalBddMan( pNtk );
// pbGlobal = (DdNode **)Vec_PtrArray( pNtk->vFuncsGlob );
// print the size of the BDDs
printf( "Shared BDD size = %6d nodes.\n", Cudd_ReadKeys(dd) - Cudd_ReadDead(dd) );
// perform naive BDD-based computation
if ( fUseNaive )
{
Abc_NtkForEachCo( pNtk, pNode, i )
{
// p = Extra_UnateComputeSlow( dd, pbGlobal[i] );
p = Extra_UnateComputeSlow( dd, (DdNode *)Abc_ObjGlobalBdd(pNode) );
if ( fVerbose )
Extra_UnateInfoPrint( p );
TotalSupps += p->nVars;
TotalUnate += p->nUnate;
Extra_UnateInfoDissolve( p );
}
}
// perform smart BDD-based computation
else
{
// create ZDD variables in the manager
Cudd_zddVarsFromBddVars( dd, 2 );
Abc_NtkForEachCo( pNtk, pNode, i )
{
// p = Extra_UnateComputeFast( dd, pbGlobal[i] );
p = Extra_UnateComputeFast( dd, (DdNode *)Abc_ObjGlobalBdd(pNode) );
if ( fVerbose )
Extra_UnateInfoPrint( p );
TotalSupps += p->nVars;
TotalUnate += p->nUnate;
Extra_UnateInfoDissolve( p );
}
}
clkUnate = Abc_Clock() - clk - clkBdd;
// print stats
printf( "Ins/Outs = %4d/%4d. Total supp = %5d. Total unate = %5d.\n",
Abc_NtkCiNum(pNtk), Abc_NtkCoNum(pNtk), TotalSupps, TotalUnate );
ABC_PRT( "Glob BDDs", clkBdd );
ABC_PRT( "Unateness", clkUnate );
ABC_PRT( "Total ", Abc_Clock() - clk );
// deref the PO functions
// Abc_NtkFreeGlobalBdds( pNtk );
// stop the global BDD manager
// Extra_StopManager( pNtk->pManGlob );
// pNtk->pManGlob = NULL;
Abc_NtkFreeGlobalBdds( pNtk, 1 );
}
/**Function*************************************************************
Synopsis [Detects unate variables using SAT.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkPrintUnateSat( Abc_Ntk_t * pNtk, int fVerbose )
{
}
#else
void Abc_NtkPrintUnate( Abc_Ntk_t * pNtk, int fUseBdds, int fUseNaive, int fVerbose ){}
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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