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/**CFile****************************************************************
FileName [ifCore.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [FPGA mapping based on priority cuts.]
Synopsis [The central part of the mapper.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 21, 2006.]
Revision [$Id: ifCore.c,v 1.00 2006/11/21 00:00:00 alanmi Exp $]
***********************************************************************/
#include "if.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern int s_MappingTime;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_ManPerformMapping( If_Man_t * p )
{
p->pPars->fAreaOnly = p->pPars->fArea; // temporary
// create the CI cutsets
If_ManSetupCiCutSets( p );
// allocate memory for other cutsets
If_ManSetupSetAll( p, If_ManCrossCut(p) );
// derive reverse top order
p->vObjsRev = If_ManReverseOrder( p );
// try sequential mapping
if ( p->pPars->fSeqMap )
{
// if ( p->pPars->fVerbose )
printf( "Performing sequential mapping without retiming.\n" );
return If_ManPerformMappingSeq( p );
}
return If_ManPerformMappingComb( p );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_ManPerformMappingComb( If_Man_t * p )
{
If_Obj_t * pObj;
int clkTotal = clock();
int i;
// set arrival times and fanout estimates
If_ManForEachCi( p, pObj, i )
{
If_ObjSetArrTime( pObj, p->pPars->pTimesArr[i] );
pObj->EstRefs = (float)1.0;
}
// delay oriented mapping
if ( p->pPars->fPreprocess && !p->pPars->fArea )
{
// map for delay
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 1, "Delay" );
// map for delay second option
p->pPars->fFancy = 1;
If_ManResetOriginalRefs( p );
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 1, "Delay-2" );
p->pPars->fFancy = 0;
// map for area
p->pPars->fArea = 1;
If_ManResetOriginalRefs( p );
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 1, "Area" );
p->pPars->fArea = 0;
}
else
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 0, "Delay" );
// try to improve area by expanding and reducing the cuts
if ( p->pPars->fExpRed )
If_ManImproveMapping( p );
// area flow oriented mapping
for ( i = 0; i < p->pPars->nFlowIters; i++ )
{
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 1, 0, "Flow" );
if ( p->pPars->fExpRed )
If_ManImproveMapping( p );
}
// area oriented mapping
for ( i = 0; i < p->pPars->nAreaIters; i++ )
{
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 2, 0, "Area" );
if ( p->pPars->fExpRed )
If_ManImproveMapping( p );
}
if ( p->pPars->fVerbose )
{
// printf( "Total memory = %7.2f Mb. Peak cut memory = %7.2f Mb. ",
// 1.0 * (p->nObjBytes + 2*sizeof(void *)) * If_ManObjNum(p) / (1<<20),
// 1.0 * p->nSetBytes * Mem_FixedReadMaxEntriesUsed(p->pMemSet) / (1<<20) );
ABC_PRT( "Total time", clock() - clkTotal );
}
// printf( "Cross cut memory = %d.\n", Mem_FixedReadMaxEntriesUsed(p->pMemSet) );
s_MappingTime = clock() - clkTotal;
// printf( "Special POs = %d.\n", If_ManCountSpecialPos(p) );
{
extern int If_CutGetCones( If_Man_t * p );
extern int If_CutCountTotalFanins( If_Man_t * p );
// If_CutGetCones( p );
// If_CutCountTotalFanins( p );
}
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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