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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"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern abctime s_MappingTime;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetDefaultPars( If_Par_t * pPars )
{
memset( pPars, 0, sizeof(If_Par_t) );
pPars->nLutSize = -1;
pPars->nCutsMax = 8;
pPars->nFlowIters = 1;
pPars->nAreaIters = 2;
pPars->DelayTarget = -1;
pPars->Epsilon = (float)0.005;
pPars->fPreprocess = 1;
pPars->fArea = 0;
pPars->fFancy = 0;
pPars->fExpRed = 1;
pPars->fLatchPaths = 0;
pPars->fEdge = 1;
pPars->fPower = 0;
pPars->fCutMin = 0;
pPars->fBidec = 0;
pPars->fVerbose = 0;
}
/**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 );
return If_ManPerformMappingComb( p );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_ManPerformMappingComb( If_Man_t * p )
{
If_Obj_t * pObj;
abctime clkTotal = Abc_Clock();
int i;
//p->vVisited2 = Vec_IntAlloc( 100 );
//p->vMarks = Vec_StrStart( If_ManObjNum(p) );
// set arrival times and fanout estimates
If_ManForEachCi( p, pObj, i )
{
If_ObjSetArrTime( pObj, p->pPars->pTimesArr ? p->pPars->pTimesArr[i] : (float)0.0 );
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, 1, "Delay" );
// map for delay second option
p->pPars->fFancy = 1;
If_ManResetOriginalRefs( p );
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 1, 0, "Delay-2" );
p->pPars->fFancy = 0;
// map for area
p->pPars->fArea = 1;
If_ManResetOriginalRefs( p );
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 1, 0, "Area" );
p->pPars->fArea = 0;
}
else
If_ManPerformMappingRound( p, p->pPars->nCutsMax, 0, 0, 1, "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, 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, 0, "Area" );
if ( p->pPars->fExpRed )
If_ManImproveMapping( p );
}
if ( p->pPars->fVerbose )
{
// Abc_Print( 1, "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_PrintTime( 1, "Total time", Abc_Clock() - clkTotal );
}
// Abc_Print( 1, "Cross cut memory = %d.\n", Mem_FixedReadMaxEntriesUsed(p->pMemSet) );
s_MappingTime = Abc_Clock() - clkTotal;
// Abc_Print( 1, "Special POs = %d.\n", If_ManCountSpecialPos(p) );
/*
{
static char * pLastName = NULL;
FILE * pTable = fopen( "fpga/ucsb/stats.txt", "a+" );
if ( pLastName == NULL || strcmp(pLastName, p->pName) )
{
fprintf( pTable, "\n" );
fprintf( pTable, "%s ", p->pName );
fprintf( pTable, "%d ", If_ManCiNum(p) );
fprintf( pTable, "%d ", If_ManCoNum(p) );
fprintf( pTable, "%d ", If_ManAndNum(p) );
ABC_FREE( pLastName );
pLastName = Abc_UtilStrsav( p->pName );
}
fprintf( pTable, "%d ", (int)p->AreaGlo );
fprintf( pTable, "%d ", (int)p->RequiredGlo );
fclose( pTable );
}
*/
p->pPars->FinalDelay = p->RequiredGlo;
p->pPars->FinalArea = p->AreaGlo;
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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