ifCore.c

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#include "if.h"
 
ABC_NAMESPACE_IMPL_START
 

 
extern abctime s_MappingTime;


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->fUserLutDec =  0;
    pPars->fUserLut2D  =  0;
    pPars->fVerbose    =  0;
}
 

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 );
}
 

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;
}

 
 
ABC_NAMESPACE_IMPL_END