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/**CFile****************************************************************
FileName [sclUpsize.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Standard-cell library representation.]
Synopsis [Selective increase of gate sizes.]
Author [Alan Mishchenko, Niklas Een]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - August 24, 2012.]
Revision [$Id: sclUpsize.c,v 1.0 2012/08/24 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sclInt.h"
#include "sclMan.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Begin by upsizing gates will many fanouts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_SclManUpsize( SC_Man * p, int Degree )
{
SC_Cell * pOld, * pNew;
Abc_Obj_t * pObj;
int i, Count = 0;
Abc_NtkForEachNode1( p->pNtk, pObj, i )
{
if ( Abc_ObjFanoutNum(pObj) < Degree )
continue;
// find new gate
pOld = Abc_SclObjCell( p, pObj );
pNew = Abc_SclObjResiable( p, pObj, 1 );
if ( pNew == NULL )
continue;
Vec_IntWriteEntry( p->vGates, Abc_ObjId(pObj), Abc_SclCellFind(p->pLib, pNew->pName) );
Count++;
}
return Count;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_SclUpsizingPerform( SC_Lib * pLib, Abc_Ntk_t * pNtk, int Degree, int nRange, int fVerbose )
{
SC_Man * p;
int nUpsizes;
// prepare the manager; collect init stats
p = Abc_SclManStart( pLib, pNtk, 1 );
// perform upsizing
nUpsizes = Abc_SclManUpsize( p, Degree );
// recompute timing
Abc_SclTimeNtkRecompute( p, &p->SumArea, &p->MaxDelay );
// print cumulative statistics
printf( "Resized: %d. ", nUpsizes );
printf( "Delay: " );
printf( "%.2f -> %.2f ps ", SC_LibTimePs(p->pLib, p->MaxDelay0), SC_LibTimePs(p->pLib, p->MaxDelay) );
printf( "(%+.1f %%). ", 100.0 * (p->MaxDelay - p->MaxDelay0)/ p->MaxDelay0 );
printf( "Area: " );
printf( "%.2f -> %.2f ", p->SumArea0, p->SumArea );
printf( "(%+.1f %%). ", 100.0 * (p->SumArea - p->SumArea0)/ p->SumArea0 );
Abc_PrintTime( 1, "Time", clock() - p->clkStart );
// save the result and quit
Abc_SclManSetGates( pLib, pNtk, p->vGates ); // updates gate pointers
Abc_SclManFree( p );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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