src/map/fpga/fpgaSwitch.c

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#include "fpgaInt.h"



float Fpga_CutGetSwitchDerefed( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut )
{
    float aResult, aResult2;
    aResult2 = Fpga_CutRefSwitch( pMan, pNode, pCut, 0 );
    aResult  = Fpga_CutDerefSwitch( pMan, pNode, pCut, 0 );
//    assert( aResult == aResult2 );
    return aResult;
}

float Fpga_CutRefSwitch( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut, int fFanouts )
{
    Fpga_Node_t * pNodeChild;
    float aArea;
    int i;
    // start the area of this cut
    aArea = pNode->Switching;
    if ( pCut->nLeaves == 1 )
        return aArea;
    // go through the children
    for ( i = 0; i < pCut->nLeaves; i++ )
    {
        pNodeChild = pCut->ppLeaves[i];
        assert( pNodeChild->nRefs >= 0 );
        if ( pNodeChild->nRefs++ > 0 )  
            continue;
        aArea += Fpga_CutRefSwitch( pMan, pNodeChild, pNodeChild->pCutBest, fFanouts );
    }
    return aArea;
}

float Fpga_CutDerefSwitch( Fpga_Man_t * pMan, Fpga_Node_t * pNode, Fpga_Cut_t * pCut, int fFanouts )
{
    Fpga_Node_t * pNodeChild;
    float aArea;
    int i;
    // start the area of this cut
    aArea = pNode->Switching;
    if ( pCut->nLeaves == 1 )
        return aArea;
    // go through the children
    for ( i = 0; i < pCut->nLeaves; i++ )
    {
        pNodeChild = pCut->ppLeaves[i];
        assert( pNodeChild->nRefs > 0 );
        if ( --pNodeChild->nRefs > 0 )  
            continue;
        aArea += Fpga_CutDerefSwitch( pMan, pNodeChild, pNodeChild->pCutBest, fFanouts );
    }
    return aArea;
}

float Fpga_MappingGetSwitching( Fpga_Man_t * pMan, Fpga_NodeVec_t * vMapping )
{
    Fpga_Node_t * pNode;
    float Switch;
    int i;
    Switch = 0.0;
    for ( i = 0; i < vMapping->nSize; i++ )
    {
        pNode = vMapping->pArray[i];
        // at least one phase has the best cut assigned
        assert( !Fpga_NodeIsAnd(pNode) || pNode->pCutBest != NULL );
        // at least one phase is used in the mapping
        assert( pNode->nRefs > 0 );
        // compute the array due to the supergate
        Switch += pNode->Switching;
    }
    // add buffer for each CO driven by a CI
    for ( i = 0; i < pMan->nOutputs; i++ )
        if ( Fpga_NodeIsVar(pMan->pOutputs[i]) && !Fpga_IsComplement(pMan->pOutputs[i]) )
            Switch += pMan->pOutputs[i]->Switching;
    return Switch;
}

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