simSwitch.c File Reference

#include "base/abc/abc.h"
#include "sim.h"

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Functions
Vec_Int_t *	Sim_NtkComputeSwitching (Abc_Ntk_t *pNtk, int nPatterns)
	FUNCTION DEFINITIONS ///.

Function Documentation

Sim_NtkComputeSwitching()

Vec_Int_t * Sim_NtkComputeSwitching	(	Abc_Ntk_t *	pNtk,
		int	nPatterns )

FUNCTION DEFINITIONS ///.

Function*************************************************************

Synopsis [Computes switching activity using simulation.]

Description [Computes switching activity, which is understood as the probability of switching under random simulation. Assigns the random simulation information at the CI and propagates it through the internal nodes of the AIG.]

SideEffects []

SeeAlso []

Definition at line 52 of file simSwitch.c.

{
    Vec_Int_t * vSwitching;
    float * pSwitching;
    Vec_Ptr_t * vNodes;
    Vec_Ptr_t * vSimInfo;
    Abc_Obj_t * pNode;
    unsigned * pSimInfo;
    int nSimWords, i;
 
    // allocate space for simulation info of all nodes
    nSimWords = SIM_NUM_WORDS(nPatterns);
    vSimInfo = Sim_UtilInfoAlloc( Abc_NtkObjNumMax(pNtk), nSimWords, 0 );
    // assign the random simulation to the CIs
    vSwitching = Vec_IntStart( Abc_NtkObjNumMax(pNtk) );
    pSwitching = (float *)vSwitching->pArray;
    Abc_NtkForEachCi( pNtk, pNode, i )
    {
        pSimInfo = (unsigned *)Vec_PtrEntry(vSimInfo, pNode->Id);
        Sim_UtilSetRandom( pSimInfo, nSimWords );
        pSwitching[pNode->Id] = Sim_ComputeSwitching( pSimInfo, nSimWords );
    }
    // simulate the internal nodes
    vNodes  = Abc_AigDfs( pNtk, 1, 0 );
    Vec_PtrForEachEntry( Abc_Obj_t *, vNodes, pNode, i )
    {
        pSimInfo = (unsigned *)Vec_PtrEntry(vSimInfo, pNode->Id);
        Sim_UtilSimulateNodeOne( pNode, vSimInfo, nSimWords, 0 );
        pSwitching[pNode->Id] = Sim_ComputeSwitching( pSimInfo, nSimWords );
    }
    Vec_PtrFree( vNodes );
    Sim_UtilInfoFree( vSimInfo );
    return vSwitching;
}

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