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giaSwitch.c
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/**CFile****************************************************************
FileName [giaSwitch.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Scalable AIG package.]
Synopsis [Computing switching activity.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: giaSwitch.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "giaAig.h"
#include "base/main/main.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
// switching estimation parameters
typedef struct Gia_ParSwi_t_ Gia_ParSwi_t;
struct Gia_ParSwi_t_
{
// user-controlled parameters
int nWords; // the number of machine words
int nIters; // the number of timeframes
int nPref; // the number of first timeframes to skip
int nRandPiFactor; // PI trans prob (-1=3/8; 0=1/2; 1=1/4; 2=1/8, etc)
int fProbOne; // collect probability of one
int fProbTrans; // collect probatility of Swiing
int fVerbose; // enables verbose output
};
typedef struct Gia_ManSwi_t_ Gia_ManSwi_t;
struct Gia_ManSwi_t_
{
Gia_Man_t * pAig;
Gia_ParSwi_t * pPars;
int nWords;
// simulation information
unsigned * pDataSim; // simulation data
unsigned * pDataSimCis; // simulation data for CIs
unsigned * pDataSimCos; // simulation data for COs
int * pData1; // switching data
};
static inline unsigned * Gia_SwiData( Gia_ManSwi_t * p, int i ) { return p->pDataSim + i * p->nWords; }
static inline unsigned * Gia_SwiDataCi( Gia_ManSwi_t * p, int i ) { return p->pDataSimCis + i * p->nWords; }
static inline unsigned * Gia_SwiDataCo( Gia_ManSwi_t * p, int i ) { return p->pDataSimCos + i * p->nWords; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [This procedure sets default parameters.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManSetDefaultParamsSwi( Gia_ParSwi_t * p )
{
memset( p, 0, sizeof(Gia_ParSwi_t) );
p->nWords = 10; // the number of machine words of simulatation data
p->nIters = 48; // the number of all timeframes to simulate
p->nPref = 16; // the number of first timeframes to skip when computing switching
p->nRandPiFactor = 0; // primary input transition probability (-1=3/8; 0=1/2; 1=1/4; 2=1/8, etc)
p->fProbOne = 0; // compute probability of signal being one (if 0, compute probability of switching)
p->fProbTrans = 1; // compute signal transition probability (if 0, compute transition probability using probability of being one)
p->fVerbose = 0; // enables verbose output
}
/**Function*************************************************************
Synopsis [Creates fast simulation manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Gia_ManSwi_t * Gia_ManSwiCreate( Gia_Man_t * pAig, Gia_ParSwi_t * pPars )
{
Gia_ManSwi_t * p;
p = ABC_ALLOC( Gia_ManSwi_t, 1 );
memset( p, 0, sizeof(Gia_ManSwi_t) );
p->pAig = Gia_ManFront( pAig );
p->pPars = pPars;
p->nWords = pPars->nWords;
p->pDataSim = ABC_ALLOC( unsigned, p->nWords * p->pAig->nFront );
p->pDataSimCis = ABC_ALLOC( unsigned, p->nWords * Gia_ManCiNum(p->pAig) );
p->pDataSimCos = ABC_ALLOC( unsigned, p->nWords * Gia_ManCoNum(p->pAig) );
p->pData1 = ABC_CALLOC( int, Gia_ManObjNum(pAig) );
return p;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_ManSwiDelete( Gia_ManSwi_t * p )
{
Gia_ManStop( p->pAig );
ABC_FREE( p->pData1 );
ABC_FREE( p->pDataSim );
ABC_FREE( p->pDataSimCis );
ABC_FREE( p->pDataSimCos );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoRandom( Gia_ManSwi_t * p, unsigned * pInfo, int nProbNum )
{
unsigned Mask = 0;
int w, i;
if ( nProbNum == -1 )
{ // 3/8 = 1/4 + 1/8
Mask = (Gia_ManRandom( 0 ) & Gia_ManRandom( 0 )) |
(Gia_ManRandom( 0 ) & Gia_ManRandom( 0 ) & Gia_ManRandom( 0 ));
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] ^= Mask;
}
else if ( nProbNum > 0 )
{
Mask = Gia_ManRandom( 0 );
for ( i = 0; i < nProbNum; i++ )
Mask &= Gia_ManRandom( 0 );
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] ^= Mask;
}
else if ( nProbNum == 0 )
{
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = Gia_ManRandom( 0 );
}
else
assert( 0 );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoRandomShift( Gia_ManSwi_t * p, unsigned * pInfo, int nProbNum )
{
unsigned Mask = 0;
int w, i;
if ( nProbNum == -1 )
{ // 3/8 = 1/4 + 1/8
Mask = (Gia_ManRandom( 0 ) & Gia_ManRandom( 0 )) |
(Gia_ManRandom( 0 ) & Gia_ManRandom( 0 ) & Gia_ManRandom( 0 ));
}
else if ( nProbNum >= 0 )
{
Mask = Gia_ManRandom( 0 );
for ( i = 0; i < nProbNum; i++ )
Mask &= Gia_ManRandom( 0 );
}
else
assert( 0 );
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = (pInfo[w] << 16) | ((pInfo[w] ^ Mask) & 0xffff);
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoZero( Gia_ManSwi_t * p, unsigned * pInfo )
{
int w;
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoOne( Gia_ManSwi_t * p, unsigned * pInfo )
{
int w;
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = ~0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoCopy( Gia_ManSwi_t * p, unsigned * pInfo, unsigned * pInfo0 )
{
int w;
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = pInfo0[w];
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoCopyShift( Gia_ManSwi_t * p, unsigned * pInfo, unsigned * pInfo0 )
{
int w;
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = (pInfo[w] << 16) | (pInfo0[w] & 0xffff);
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimulateCi( Gia_ManSwi_t * p, Gia_Obj_t * pObj, int iCi )
{
unsigned * pInfo = Gia_SwiData( p, Gia_ObjValue(pObj) );
unsigned * pInfo0 = Gia_SwiDataCi( p, iCi );
int w;
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = pInfo0[w];
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimulateCo( Gia_ManSwi_t * p, int iCo, Gia_Obj_t * pObj )
{
unsigned * pInfo = Gia_SwiDataCo( p, iCo );
unsigned * pInfo0 = Gia_SwiData( p, Gia_ObjDiff0(pObj) );
int w;
if ( Gia_ObjFaninC0(pObj) )
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = ~pInfo0[w];
else
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = pInfo0[w];
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimulateNode( Gia_ManSwi_t * p, Gia_Obj_t * pObj )
{
unsigned * pInfo = Gia_SwiData( p, Gia_ObjValue(pObj) );
unsigned * pInfo0 = Gia_SwiData( p, Gia_ObjDiff0(pObj) );
unsigned * pInfo1 = Gia_SwiData( p, Gia_ObjDiff1(pObj) );
int w;
if ( Gia_ObjFaninC0(pObj) )
{
if ( Gia_ObjFaninC1(pObj) )
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = ~(pInfo0[w] | pInfo1[w]);
else
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = ~pInfo0[w] & pInfo1[w];
}
else
{
if ( Gia_ObjFaninC1(pObj) )
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = pInfo0[w] & ~pInfo1[w];
else
for ( w = p->nWords-1; w >= 0; w-- )
pInfo[w] = pInfo0[w] & pInfo1[w];
}
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoInit( Gia_ManSwi_t * p )
{
int i = 0;
for ( ; i < Gia_ManPiNum(p->pAig); i++ )
Gia_ManSwiSimInfoRandom( p, Gia_SwiDataCi(p, i), 0 );
for ( ; i < Gia_ManCiNum(p->pAig); i++ )
Gia_ManSwiSimInfoZero( p, Gia_SwiDataCi(p, i) );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoTransfer( Gia_ManSwi_t * p, int nProbNum )
{
int i = 0, nShift = Gia_ManPoNum(p->pAig)-Gia_ManPiNum(p->pAig);
for ( ; i < Gia_ManPiNum(p->pAig); i++ )
Gia_ManSwiSimInfoRandom( p, Gia_SwiDataCi(p, i), nProbNum );
for ( ; i < Gia_ManCiNum(p->pAig); i++ )
Gia_ManSwiSimInfoCopy( p, Gia_SwiDataCi(p, i), Gia_SwiDataCo(p, nShift+i) );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimInfoTransferShift( Gia_ManSwi_t * p, int nProbNum )
{
int i = 0, nShift = Gia_ManPoNum(p->pAig)-Gia_ManPiNum(p->pAig);
for ( ; i < Gia_ManPiNum(p->pAig); i++ )
Gia_ManSwiSimInfoRandomShift( p, Gia_SwiDataCi(p, i), nProbNum );
for ( ; i < Gia_ManCiNum(p->pAig); i++ )
Gia_ManSwiSimInfoCopyShift( p, Gia_SwiDataCi(p, i), Gia_SwiDataCo(p, nShift+i) );
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Gia_ManSwiSimInfoCountOnes( Gia_ManSwi_t * p, int iPlace )
{
unsigned * pInfo;
int w, Counter = 0;
pInfo = Gia_SwiData( p, iPlace );
for ( w = p->nWords-1; w >= 0; w-- )
Counter += Gia_WordCountOnes( pInfo[w] );
return Counter;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int Gia_ManSwiSimInfoCountTrans( Gia_ManSwi_t * p, int iPlace )
{
unsigned * pInfo;
int w, Counter = 0;
pInfo = Gia_SwiData( p, iPlace );
for ( w = p->nWords-1; w >= 0; w-- )
Counter += 2*Gia_WordCountOnes( (pInfo[w] ^ (pInfo[w] >> 16)) & 0xffff );
return Counter;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline void Gia_ManSwiSimulateRound( Gia_ManSwi_t * p, int fCount )
{
Gia_Obj_t * pObj;
int i;//, iCis = 0, iCos = 0;
assert( p->pAig->nFront > 0 );
assert( Gia_ManConst0(p->pAig)->Value == 0 );
Gia_ManSwiSimInfoZero( p, Gia_SwiData(p, 0) );
Gia_ManForEachObj1( p->pAig, pObj, i )
{
if ( Gia_ObjIsAndOrConst0(pObj) )
{
assert( Gia_ObjValue(pObj) < p->pAig->nFront );
Gia_ManSwiSimulateNode( p, pObj );
}
else if ( Gia_ObjIsCo(pObj) )
{
assert( Gia_ObjValue(pObj) == GIA_NONE );
// Gia_ManSwiSimulateCo( p, iCos++, pObj );
Gia_ManSwiSimulateCo( p, Gia_ObjCioId(pObj), pObj );
}
else // if ( Gia_ObjIsCi(pObj) )
{
assert( Gia_ObjValue(pObj) < p->pAig->nFront );
// Gia_ManSwiSimulateCi( p, pObj, iCis++ );
Gia_ManSwiSimulateCi( p, pObj, Gia_ObjCioId(pObj) );
}
if ( fCount && !Gia_ObjIsCo(pObj) )
{
if ( p->pPars->fProbTrans )
p->pData1[i] += Gia_ManSwiSimInfoCountTrans( p, Gia_ObjValue(pObj) );
else
p->pData1[i] += Gia_ManSwiSimInfoCountOnes( p, Gia_ObjValue(pObj) );
}
}
// assert( Gia_ManCiNum(p->pAig) == iCis );
// assert( Gia_ManCoNum(p->pAig) == iCos );
}
/**Function*************************************************************
Synopsis [Computes switching activity of one node.]
Description [Uses the formula: Switching = 2 * nOnes * nZeros / (nTotal ^ 2) ]
SideEffects []
SeeAlso []
***********************************************************************/
float Gia_ManSwiComputeSwitching( int nOnes, int nSimWords )
{
int nTotal = 32 * nSimWords;
return (float)2.0 * nOnes / nTotal * (nTotal - nOnes) / nTotal;
}
/**Function*************************************************************
Synopsis [Computes switching activity of one node.]
Description [Uses the formula: Switching = 2 * nOnes * nZeros / (nTotal ^ 2) ]
SideEffects []
SeeAlso []
***********************************************************************/
float Gia_ManSwiComputeProbOne( int nOnes, int nSimWords )
{
int nTotal = 32 * nSimWords;
return (float)nOnes / nTotal;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManSwiSimulate( Gia_Man_t * pAig, Gia_ParSwi_t * pPars )
{
Gia_ManSwi_t * p;
Gia_Obj_t * pObj;
Vec_Int_t * vSwitching;
float * pSwitching;
int i;
abctime clk, clkTotal = Abc_Clock();
if ( pPars->fProbOne && pPars->fProbTrans )
printf( "Conflict of options: Can either compute probability of 1, or probability of switching by observing transitions.\n" );
// create manager
clk = Abc_Clock();
p = Gia_ManSwiCreate( pAig, pPars );
if ( pPars->fVerbose )
{
printf( "Obj = %8d (%8d). F = %6d. ",
pAig->nObjs, Gia_ManCiNum(pAig) + Gia_ManAndNum(pAig), p->pAig->nFront );
printf( "AIG = %7.2f MB. F-mem = %7.2f MB. Other = %7.2f MB. ",
12.0*Gia_ManObjNum(p->pAig)/(1<<20),
4.0*p->nWords*p->pAig->nFront/(1<<20),
4.0*p->nWords*(Gia_ManCiNum(p->pAig) + Gia_ManCoNum(p->pAig))/(1<<20) );
ABC_PRT( "Time", Abc_Clock() - clk );
}
// perform simulation
Gia_ManRandom( 1 );
Gia_ManSwiSimInfoInit( p );
for ( i = 0; i < pPars->nIters; i++ )
{
Gia_ManSwiSimulateRound( p, i >= pPars->nPref );
if ( i == pPars->nIters - 1 )
break;
if ( pPars->fProbTrans )
Gia_ManSwiSimInfoTransferShift( p, pPars->nRandPiFactor );
else
Gia_ManSwiSimInfoTransfer( p, pPars->nRandPiFactor );
}
if ( pPars->fVerbose )
{
printf( "Simulated %d frames with %d words. ", pPars->nIters, pPars->nWords );
ABC_PRT( "Simulation time", Abc_Clock() - clkTotal );
}
// derive the result
vSwitching = Vec_IntStart( Gia_ManObjNum(pAig) );
pSwitching = (float *)vSwitching->pArray;
if ( pPars->fProbOne )
{
Gia_ManForEachObj( pAig, pObj, i )
pSwitching[i] = Gia_ManSwiComputeProbOne( p->pData1[i], pPars->nWords*(pPars->nIters-pPars->nPref) );
Gia_ManForEachCo( pAig, pObj, i )
{
if ( Gia_ObjFaninC0(pObj) )
pSwitching[Gia_ObjId(pAig,pObj)] = (float)1.0-pSwitching[Gia_ObjId(pAig,Gia_ObjFanin0(pObj))];
else
pSwitching[Gia_ObjId(pAig,pObj)] = pSwitching[Gia_ObjId(pAig,Gia_ObjFanin0(pObj))];
}
}
else if ( pPars->fProbTrans )
{
Gia_ManForEachObj( pAig, pObj, i )
pSwitching[i] = Gia_ManSwiComputeProbOne( p->pData1[i], pPars->nWords*(pPars->nIters-pPars->nPref) );
}
else
{
Gia_ManForEachObj( pAig, pObj, i )
pSwitching[i] = Gia_ManSwiComputeSwitching( p->pData1[i], pPars->nWords*(pPars->nIters-pPars->nPref) );
}
/*
printf( "PI: " );
Gia_ManForEachPi( pAig, pObj, i )
printf( "%d=%d (%f) ", i, p->pData1[Gia_ObjId(pAig,pObj)], pSwitching[Gia_ObjId(pAig,pObj)] );
printf( "\n" );
printf( "LO: " );
Gia_ManForEachRo( pAig, pObj, i )
printf( "%d=%d (%f) ", i, p->pData1[Gia_ObjId(pAig,pObj)], pSwitching[Gia_ObjId(pAig,pObj)] );
printf( "\n" );
printf( "PO: " );
Gia_ManForEachPo( pAig, pObj, i )
printf( "%d=%d (%f) ", i, p->pData1[Gia_ObjId(pAig,pObj)], pSwitching[Gia_ObjId(pAig,pObj)] );
printf( "\n" );
printf( "LI: " );
Gia_ManForEachRi( pAig, pObj, i )
printf( "%d=%d (%f) ", i, p->pData1[Gia_ObjId(pAig,pObj)], pSwitching[Gia_ObjId(pAig,pObj)] );
printf( "\n" );
*/
Gia_ManSwiDelete( p );
return vSwitching;
}
/**Function*************************************************************
Synopsis [Computes probability of switching (or of being 1).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Int_t * Gia_ManComputeSwitchProbs( Gia_Man_t * pGia, int nFrames, int nPref, int fProbOne )
{
Gia_ParSwi_t Pars, * pPars = &Pars;
// set the default parameters
Gia_ManSetDefaultParamsSwi( pPars );
// override some of the defaults
pPars->nIters = nFrames; // set number of total timeframes
if ( Abc_FrameReadFlag("seqsimframes") )
pPars->nIters = atoi( Abc_FrameReadFlag("seqsimframes") );
pPars->nPref = nPref; // set number of first timeframes to skip
// decide what should be computed
if ( fProbOne )
{
// if the user asked to compute propability of 1, we do not need transition information
pPars->fProbOne = 1; // enable computing probabiblity of being one
pPars->fProbTrans = 0; // disable computing transition probability
}
else
{
// if the user asked for transition propabability, we do not need to compute probability of 1
pPars->fProbOne = 0; // disable computing probabiblity of being one
pPars->fProbTrans = 1; // enable computing transition probability
}
// perform the computation of switching activity
return Gia_ManSwiSimulate( pGia, pPars );
}
Vec_Int_t * Gia_ManComputeSwitchProbs2( Gia_Man_t * pGia, int nFrames, int nPref, int fProbOne, int nRandPiFactor )
{
Gia_ParSwi_t Pars, * pPars = &Pars;
// set the default parameters
Gia_ManSetDefaultParamsSwi( pPars );
pPars->nRandPiFactor = nRandPiFactor;
// override some of the defaults
pPars->nIters = nFrames; // set number of total timeframes
if ( Abc_FrameReadFlag("seqsimframes") )
pPars->nIters = atoi( Abc_FrameReadFlag("seqsimframes") );
pPars->nPref = nPref; // set number of first timeframes to skip
// decide what should be computed
if ( fProbOne )
{
// if the user asked to compute propability of 1, we do not need transition information
pPars->fProbOne = 1; // enable computing probabiblity of being one
pPars->fProbTrans = 0; // disable computing transition probability
}
else
{
// if the user asked for transition propabability, we do not need to compute probability of 1
pPars->fProbOne = 0; // disable computing probabiblity of being one
pPars->fProbTrans = 1; // enable computing transition probability
}
// perform the computation of switching activity
return Gia_ManSwiSimulate( pGia, pPars );
}
Vec_Int_t * Saig_ManComputeSwitchProbs( Aig_Man_t * pAig, int nFrames, int nPref, int fProbOne )
{
Vec_Int_t * vSwitching, * vResult;
Gia_Man_t * p;
Aig_Obj_t * pObj;
int i;
// translate AIG into the intermediate form (takes care of choices if present!)
p = Gia_ManFromAigSwitch( pAig );
// perform the computation of switching activity
vSwitching = Gia_ManComputeSwitchProbs( p, nFrames, nPref, fProbOne );
// transfer the computed result to the original AIG
vResult = Vec_IntStart( Aig_ManObjNumMax(pAig) );
Aig_ManForEachObj( pAig, pObj, i )
{
// if ( Aig_ObjIsCo(pObj) )
// printf( "%d=%f\n", i, Abc_Int2Float( Vec_IntEntry(vSwitching, Abc_Lit2Var(pObj->iData)) ) );
Vec_IntWriteEntry( vResult, i, Vec_IntEntry(vSwitching, Abc_Lit2Var(pObj->iData)) );
}
// delete intermediate results
Vec_IntFree( vSwitching );
Gia_ManStop( p );
return vResult;
}
/**Function*************************************************************
Synopsis [Computes probability of switching (or of being 1).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float Gia_ManEvaluateSwitching( Gia_Man_t * p )
{
Gia_Obj_t * pObj;
float SwitchTotal = 0.0;
int i;
assert( p->pSwitching );
ABC_FREE( p->pRefs );
Gia_ManCreateRefs( p );
Gia_ManForEachObj( p, pObj, i )
SwitchTotal += (float)Gia_ObjRefNum(p, pObj) * p->pSwitching[i] / 255;
return SwitchTotal;
}
/**Function*************************************************************
Synopsis [Computes probability of switching (or of being 1).]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
/*
float Gia_ManComputeSwitching( Gia_Man_t * p, int nFrames, int nPref, int fProbOne )
{
Gia_Man_t * pDfs;
Gia_Obj_t * pObj, * pObjDfs;
Vec_Int_t * vSwitching;
float * pSwitching, Switch, SwitchTotal = 0.0;
int i;
// derives the DFS ordered AIG
if ( Gia_ManHasMapping(p) )
Gia_ManSetRefsMapped(p);
else
Gia_ManCreateRefs( p );
// pDfs = Gia_ManDupOrderDfs( p );
pDfs = Gia_ManDup( p );
assert( Gia_ManObjNum(pDfs) == Gia_ManObjNum(p) );
// perform the computation of switching activity
vSwitching = Gia_ManComputeSwitchProbs( pDfs, nFrames, nPref, fProbOne );
// transfer the computed result to the original AIG
ABC_FREE( p->pSwitching );
p->pSwitching = ABC_CALLOC( unsigned char, Gia_ManObjNum(p) );
pSwitching = (float *)vSwitching->pArray;
Gia_ManForEachObj( p, pObj, i )
{
pObjDfs = Gia_ObjFromLit( pDfs, pObj->Value );
Switch = pSwitching[ Gia_ObjId(pDfs, pObjDfs) ];
p->pSwitching[i] = (char)((Switch >= 1.0) ? 255 : (int)((0.002 + Switch) * 255)); // 0.00196 = (1/255)/2
if ( Gia_ObjIsCi(pObj) || (Gia_ObjIsAnd(pObj) && (!Gia_ManHasMapping(p) || Gia_ObjIsLut(p, i))) )
{
SwitchTotal += (float)Gia_ObjRefNum(p, pObj) * p->pSwitching[i] / 255;
// printf( "%d = %.2f\n", i, (float)Gia_ObjRefNum(p, pObj) * p->pSwitching[i] / 255 );
}
}
Vec_IntFree( vSwitching );
Gia_ManStop( pDfs );
return SwitchTotal;
}
*/
float Gia_ManComputeSwitching( Gia_Man_t * p, int nFrames, int nPref, int fProbOne )
{
Vec_Int_t * vSwitching = Gia_ManComputeSwitchProbs( p, nFrames, nPref, fProbOne );
float * pSwi = (float *)Vec_IntArray(vSwitching), SwiTotal = 0;
Gia_Obj_t * pObj;
int i, k, iFan;
if ( Gia_ManHasMapping(p) )
{
Gia_ManForEachLut( p, i )
Gia_LutForEachFanin( p, i, iFan, k )
SwiTotal += pSwi[iFan];
}
else
{
Gia_ManForEachAnd( p, pObj, i )
SwiTotal += pSwi[Gia_ObjFaninId0(pObj, i)] + pSwi[Gia_ObjFaninId1(pObj, i)];
}
if ( 0 )
{
Gia_ManForEachObj( p, pObj, i )
{
printf( "Switch %6.2f ", pSwi[i] );
Gia_ObjPrint( p, pObj );
}
}
Vec_IntFree( vSwitching );
return SwiTotal;
}
/**Function*************************************************************
Synopsis [Determine probability of being 1 at the outputs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Flt_t * Gia_ManPrintOutputProb( Gia_Man_t * p )
{
Vec_Flt_t * vSimData;
Gia_Man_t * pDfs = Gia_ManDup( p );
assert( Gia_ManObjNum(pDfs) == Gia_ManObjNum(p) );
vSimData = (Vec_Flt_t *)Gia_ManComputeSwitchProbs( pDfs, (Gia_ManRegNum(p) ? 16 : 1), 0, 1 );
Gia_ManStop( pDfs );
return vSimData;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END