/**CFile****************************************************************
FileName [sswSim.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Inductive prover with constraints.]
Synopsis [Sequential simulator used by the inductive prover.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - September 1, 2008.]
Revision [$Id: sswSim.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $]
***********************************************************************/
#include "sswInt.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
// simulation manager
struct Ssw_Sml_t_
{
Aig_Man_t * pAig; // the original AIG manager
int nPref; // the number of timeframes in the prefix
int nFrames; // the number of timeframes
int nWordsFrame; // the number of words in each timeframe
int nWordsTotal; // the total number of words at a node
int nWordsPref; // the number of word in the prefix
int fNonConstOut; // have seen a non-const-0 output during simulation
int nSimRounds; // statistics
clock_t timeSim; // statistics
unsigned pData[0]; // simulation data for the nodes
};
static inline unsigned * Ssw_ObjSim( Ssw_Sml_t * p, int Id ) { return p->pData + p->nWordsTotal * Id; }
static inline unsigned Ssw_ObjRandomSim() { return Aig_ManRandom(0); }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Computes hash value of the node using its simulation info.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
unsigned Ssw_SmlObjHashWord( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
static int s_SPrimes[128] = {
1009, 1049, 1093, 1151, 1201, 1249, 1297, 1361, 1427, 1459,
1499, 1559, 1607, 1657, 1709, 1759, 1823, 1877, 1933, 1997,
2039, 2089, 2141, 2213, 2269, 2311, 2371, 2411, 2467, 2543,
2609, 2663, 2699, 2741, 2797, 2851, 2909, 2969, 3037, 3089,
3169, 3221, 3299, 3331, 3389, 3461, 3517, 3557, 3613, 3671,
3719, 3779, 3847, 3907, 3943, 4013, 4073, 4129, 4201, 4243,
4289, 4363, 4441, 4493, 4549, 4621, 4663, 4729, 4793, 4871,
4933, 4973, 5021, 5087, 5153, 5227, 5281, 5351, 5417, 5471,
5519, 5573, 5651, 5693, 5749, 5821, 5861, 5923, 6011, 6073,
6131, 6199, 6257, 6301, 6353, 6397, 6481, 6563, 6619, 6689,
6737, 6803, 6863, 6917, 6977, 7027, 7109, 7187, 7237, 7309,
7393, 7477, 7523, 7561, 7607, 7681, 7727, 7817, 7877, 7933,
8011, 8039, 8059, 8081, 8093, 8111, 8123, 8147
};
unsigned * pSims;
unsigned uHash;
int i;
// assert( p->nWordsTotal <= 128 );
uHash = 0;
pSims = Ssw_ObjSim(p, pObj->Id);
for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
uHash ^= pSims[i] * s_SPrimes[i & 0x7F];
return uHash;
}
/**Function*************************************************************
Synopsis [Returns 1 if simulation info is composed of all zeros.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlObjIsConstWord( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
unsigned * pSims;
int i;
pSims = Ssw_ObjSim(p, pObj->Id);
for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
if ( pSims[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if simulation infos are equal.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlObjsAreEqualWord( Ssw_Sml_t * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 )
{
unsigned * pSims0, * pSims1;
int i;
pSims0 = Ssw_ObjSim(p, pObj0->Id);
pSims1 = Ssw_ObjSim(p, pObj1->Id);
for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
if ( pSims0[i] != pSims1[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if the node appears to be constant 1 candidate.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlObjIsConstBit( void * p, Aig_Obj_t * pObj )
{
return pObj->fPhase == pObj->fMarkB;
}
/**Function*************************************************************
Synopsis [Returns 1 if the nodes appear equal.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlObjsAreEqualBit( void * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1 )
{
return (pObj0->fPhase == pObj1->fPhase) == (pObj0->fMarkB == pObj1->fMarkB);
}
/**Function*************************************************************
Synopsis [Counts the number of 1s in the XOR of simulation data.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodeNotEquWeight( Ssw_Sml_t * p, int Left, int Right )
{
unsigned * pSimL, * pSimR;
int k, Counter = 0;
pSimL = Ssw_ObjSim( p, Left );
pSimR = Ssw_ObjSim( p, Right );
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
Counter += Aig_WordCountOnes( pSimL[k] ^ pSimR[k] );
return Counter;
}
/**Function*************************************************************
Synopsis [Checks implication.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlCheckXorImplication( Ssw_Sml_t * p, Aig_Obj_t * pObjLi, Aig_Obj_t * pObjLo, Aig_Obj_t * pCand )
{
unsigned * pSimLi, * pSimLo, * pSimCand;
int k;
assert( pObjLo->fPhase == 0 );
// pObjLi->fPhase may be 1, but the LI simulation data is not complemented!
pSimCand = Ssw_ObjSim( p, Aig_Regular(pCand)->Id );
pSimLi = Ssw_ObjSim( p, pObjLi->Id );
pSimLo = Ssw_ObjSim( p, pObjLo->Id );
if ( Aig_Regular(pCand)->fPhase ^ Aig_IsComplement(pCand) )
{
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
if ( ~pSimCand[k] & (pSimLi[k] ^ pSimLo[k]) )
return 0;
}
else
{
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
if ( pSimCand[k] & (pSimLi[k] ^ pSimLo[k]) )
return 0;
}
return 1;
}
/**Function*************************************************************
Synopsis [Counts the number of 1s in the implication.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlCountXorImplication( Ssw_Sml_t * p, Aig_Obj_t * pObjLi, Aig_Obj_t * pObjLo, Aig_Obj_t * pCand )
{
unsigned * pSimLi, * pSimLo, * pSimCand;
int k, Counter = 0;
assert( pObjLo->fPhase == 0 );
// pObjLi->fPhase may be 1, but the LI simulation data is not complemented!
pSimCand = Ssw_ObjSim( p, Aig_Regular(pCand)->Id );
pSimLi = Ssw_ObjSim( p, pObjLi->Id );
pSimLo = Ssw_ObjSim( p, pObjLo->Id );
if ( Aig_Regular(pCand)->fPhase ^ Aig_IsComplement(pCand) )
{
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
Counter += Aig_WordCountOnes(~pSimCand[k] & ~(pSimLi[k] ^ pSimLo[k]));
}
else
{
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
Counter += Aig_WordCountOnes(pSimCand[k] & ~(pSimLi[k] ^ pSimLo[k]));
}
return Counter;
}
/**Function*************************************************************
Synopsis [Counts the number of 1s in the implication.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlCountEqual( Ssw_Sml_t * p, Aig_Obj_t * pObjLi, Aig_Obj_t * pObjLo )
{
unsigned * pSimLi, * pSimLo;
int k, Counter = 0;
assert( pObjLo->fPhase == 0 );
// pObjLi->fPhase may be 1, but the LI simulation data is not complemented!
pSimLi = Ssw_ObjSim( p, pObjLi->Id );
pSimLo = Ssw_ObjSim( p, pObjLo->Id );
for ( k = p->nWordsPref; k < p->nWordsTotal; k++ )
Counter += Aig_WordCountOnes( ~(pSimLi[k] ^ pSimLo[k]) );
return Counter;
}
/**Function*************************************************************
Synopsis [Returns 1 if simulation info is composed of all zeros.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodeIsZero( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
unsigned * pSims;
int i;
pSims = Ssw_ObjSim(p, pObj->Id);
for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
if ( pSims[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if simulation info is composed of all zeros.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodeIsZeroFrame( Ssw_Sml_t * p, Aig_Obj_t * pObj, int f )
{
unsigned * pSims = Ssw_ObjSim(p, pObj->Id);
return pSims[f] == 0;
}
/**Function*************************************************************
Synopsis [Counts the number of one's in the patten the object.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodeCountOnesReal( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
unsigned * pSims;
int i, Counter = 0;
pSims = Ssw_ObjSim(p, Aig_Regular(pObj)->Id);
if ( Aig_Regular(pObj)->fPhase ^ Aig_IsComplement(pObj) )
{
for ( i = 0; i < p->nWordsTotal; i++ )
Counter += Aig_WordCountOnes( ~pSims[i] );
}
else
{
for ( i = 0; i < p->nWordsTotal; i++ )
Counter += Aig_WordCountOnes( pSims[i] );
}
return Counter;
}
/**Function*************************************************************
Synopsis [Counts the number of one's in the patten the object.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodeCountOnesRealVec( Ssw_Sml_t * p, Vec_Ptr_t * vObjs )
{
Aig_Obj_t * pObj;
unsigned * pSims, uWord;
int i, k, Counter = 0;
if ( Vec_PtrSize(vObjs) == 0 )
return 0;
for ( i = 0; i < p->nWordsTotal; i++ )
{
uWord = 0;
Vec_PtrForEachEntry( Aig_Obj_t *, vObjs, pObj, k )
{
pSims = Ssw_ObjSim(p, Aig_Regular(pObj)->Id);
if ( Aig_Regular(pObj)->fPhase ^ Aig_IsComplement(pObj) )
uWord |= ~pSims[i];
else
uWord |= pSims[i];
}
Counter += Aig_WordCountOnes( uWord );
}
return Counter;
}
/**Function*************************************************************
Synopsis [Generated const 0 pattern.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlSavePattern0( Ssw_Man_t * p, int fInit )
{
memset( p->pPatWords, 0, sizeof(unsigned) * p->nPatWords );
}
/**Function*************************************************************
Synopsis [[Generated const 1 pattern.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlSavePattern1( Ssw_Man_t * p, int fInit )
{
Aig_Obj_t * pObj;
int i, k, nTruePis;
memset( p->pPatWords, 0xff, sizeof(unsigned) * p->nPatWords );
if ( !fInit )
return;
// clear the state bits to correspond to all-0 initial state
nTruePis = Saig_ManPiNum(p->pAig);
k = 0;
Saig_ManForEachLo( p->pAig, pObj, i )
Abc_InfoXorBit( p->pPatWords, nTruePis * p->nFrames + k++ );
}
/**Function*************************************************************
Synopsis [Creates the counter-example from the successful pattern.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int * Ssw_SmlCheckOutputSavePattern( Ssw_Sml_t * p, Aig_Obj_t * pObjPo )
{
Aig_Obj_t * pFanin, * pObjPi;
unsigned * pSims;
int i, k, BestPat, * pModel;
// find the word of the pattern
pFanin = Aig_ObjFanin0(pObjPo);
pSims = Ssw_ObjSim(p, pFanin->Id);
for ( i = 0; i < p->nWordsTotal; i++ )
if ( pSims[i] )
break;
assert( i < p->nWordsTotal );
// find the bit of the pattern
for ( k = 0; k < 32; k++ )
if ( pSims[i] & (1 << k) )
break;
assert( k < 32 );
// determine the best pattern
BestPat = i * 32 + k;
// fill in the counter-example data
pModel = ABC_ALLOC( int, Aig_ManCiNum(p->pAig)+1 );
Aig_ManForEachCi( p->pAig, pObjPi, i )
{
pModel[i] = Abc_InfoHasBit(Ssw_ObjSim(p, pObjPi->Id), BestPat);
// Abc_Print( 1, "%d", pModel[i] );
}
pModel[Aig_ManCiNum(p->pAig)] = pObjPo->Id;
// Abc_Print( 1, "\n" );
return pModel;
}
/**Function*************************************************************
Synopsis [Returns 1 if the one of the output is already non-constant 0.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int * Ssw_SmlCheckOutput( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj;
int i;
// make sure the reference simulation pattern does not detect the bug
pObj = Aig_ManCo( p->pAig, 0 );
assert( Aig_ObjFanin0(pObj)->fPhase == (unsigned)Aig_ObjFaninC0(pObj) );
Aig_ManForEachCo( p->pAig, pObj, i )
{
if ( !Ssw_SmlObjIsConstWord( p, Aig_ObjFanin0(pObj) ) )
{
// create the counter-example from this pattern
return Ssw_SmlCheckOutputSavePattern( p, pObj );
}
}
return NULL;
}
/**Function*************************************************************
Synopsis [Assigns random patterns to the PI node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlAssignRandom( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
unsigned * pSims;
int i, f;
assert( Aig_ObjIsCi(pObj) );
pSims = Ssw_ObjSim( p, pObj->Id );
for ( i = 0; i < p->nWordsTotal; i++ )
pSims[i] = Ssw_ObjRandomSim();
// set the first bit 0 in each frame
assert( p->nWordsFrame * p->nFrames == p->nWordsTotal );
for ( f = 0; f < p->nFrames; f++ )
pSims[p->nWordsFrame*f] <<= 1;
}
/**Function*************************************************************
Synopsis [Assigns random patterns to the PI node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlAssignRandomFrame( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
{
unsigned * pSims;
int i;
assert( iFrame < p->nFrames );
assert( Aig_ObjIsCi(pObj) );
pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = Ssw_ObjRandomSim();
}
/**Function*************************************************************
Synopsis [Assigns constant patterns to the PI node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlObjAssignConst( Ssw_Sml_t * p, Aig_Obj_t * pObj, int fConst1, int iFrame )
{
unsigned * pSims;
int i;
assert( iFrame < p->nFrames );
assert( Aig_ObjIsCi(pObj) );
pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = fConst1? ~(unsigned)0 : 0;
}
/**Function*************************************************************
Synopsis [Assigns constant patterns to the PI node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlObjAssignConstWord( Ssw_Sml_t * p, Aig_Obj_t * pObj, int fConst1, int iFrame, int iWord )
{
unsigned * pSims;
assert( iFrame < p->nFrames );
assert( iWord < p->nWordsFrame );
assert( Aig_ObjIsCi(pObj) );
pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
pSims[iWord] = fConst1? ~(unsigned)0 : 0;
}
/**Function*************************************************************
Synopsis [Assigns constant patterns to the PI node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlObjSetWord( Ssw_Sml_t * p, Aig_Obj_t * pObj, unsigned Word, int iWord, int iFrame )
{
unsigned * pSims;
assert( iFrame < p->nFrames );
assert( Aig_ObjIsCi(pObj) );
pSims = Ssw_ObjSim( p, pObj->Id ) + p->nWordsFrame * iFrame;
pSims[iWord] = Word;
}
/**Function*************************************************************
Synopsis [Assings distance-1 simulation info for the PIs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlAssignDist1( Ssw_Sml_t * p, unsigned * pPat )
{
Aig_Obj_t * pObj;
int f, i, k, Limit, nTruePis;
assert( p->nFrames > 0 );
if ( p->nFrames == 1 )
{
// copy the PI info
Aig_ManForEachCi( p->pAig, pObj, i )
Ssw_SmlObjAssignConst( p, pObj, Abc_InfoHasBit(pPat, i), 0 );
// flip one bit
Limit = Abc_MinInt( Aig_ManCiNum(p->pAig), p->nWordsTotal * 32 - 1 );
for ( i = 0; i < Limit; i++ )
Abc_InfoXorBit( Ssw_ObjSim( p, Aig_ManCi(p->pAig,i)->Id ), i+1 );
}
else
{
int fUseDist1 = 0;
// copy the PI info for each frame
nTruePis = Aig_ManCiNum(p->pAig) - Aig_ManRegNum(p->pAig);
for ( f = 0; f < p->nFrames; f++ )
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_SmlObjAssignConst( p, pObj, Abc_InfoHasBit(pPat, nTruePis * f + i), f );
// copy the latch info
k = 0;
Saig_ManForEachLo( p->pAig, pObj, i )
Ssw_SmlObjAssignConst( p, pObj, Abc_InfoHasBit(pPat, nTruePis * p->nFrames + k++), 0 );
// assert( p->pFrames == NULL || nTruePis * p->nFrames + k == Aig_ManCiNum(p->pFrames) );
// flip one bit of the last frame
if ( fUseDist1 ) //&& p->nFrames == 2 )
{
Limit = Abc_MinInt( nTruePis, p->nWordsFrame * 32 - 1 );
for ( i = 0; i < Limit; i++ )
Abc_InfoXorBit( Ssw_ObjSim( p, Aig_ManCi(p->pAig, i)->Id ) + p->nWordsFrame*(p->nFrames-1), i+1 );
}
}
}
/**Function*************************************************************
Synopsis [Assings distance-1 simulation info for the PIs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlAssignDist1Plus( Ssw_Sml_t * p, unsigned * pPat )
{
Aig_Obj_t * pObj;
int f, i, Limit;
assert( p->nFrames > 0 );
// copy the pattern into the primary inputs
Aig_ManForEachCi( p->pAig, pObj, i )
Ssw_SmlObjAssignConst( p, pObj, Abc_InfoHasBit(pPat, i), 0 );
// set distance one PIs for the first frame
Limit = Abc_MinInt( Saig_ManPiNum(p->pAig), p->nWordsFrame * 32 - 1 );
for ( i = 0; i < Limit; i++ )
Abc_InfoXorBit( Ssw_ObjSim( p, Aig_ManCi(p->pAig, i)->Id ), i+1 );
// create random info for the remaining timeframes
for ( f = 1; f < p->nFrames; f++ )
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_SmlAssignRandomFrame( p, pObj, f );
}
/**Function*************************************************************
Synopsis [Simulates one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlNodeSimulate( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
{
unsigned * pSims, * pSims0, * pSims1;
int fCompl, fCompl0, fCompl1, i;
assert( iFrame < p->nFrames );
assert( !Aig_IsComplement(pObj) );
assert( Aig_ObjIsNode(pObj) );
assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
// get hold of the simulation information
pSims = Ssw_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame;
pSims0 = Ssw_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame;
pSims1 = Ssw_ObjSim(p, Aig_ObjFanin1(pObj)->Id) + p->nWordsFrame * iFrame;
// get complemented attributes of the children using their random info
fCompl = pObj->fPhase;
fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj));
fCompl1 = Aig_ObjPhaseReal(Aig_ObjChild1(pObj));
// simulate
if ( fCompl0 && fCompl1 )
{
if ( fCompl )
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (pSims0[i] | pSims1[i]);
else
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = ~(pSims0[i] | pSims1[i]);
}
else if ( fCompl0 && !fCompl1 )
{
if ( fCompl )
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (pSims0[i] | ~pSims1[i]);
else
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (~pSims0[i] & pSims1[i]);
}
else if ( !fCompl0 && fCompl1 )
{
if ( fCompl )
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (~pSims0[i] | pSims1[i]);
else
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (pSims0[i] & ~pSims1[i]);
}
else // if ( !fCompl0 && !fCompl1 )
{
if ( fCompl )
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = ~(pSims0[i] & pSims1[i]);
else
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = (pSims0[i] & pSims1[i]);
}
}
/**Function*************************************************************
Synopsis [Simulates one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNodesCompareInFrame( Ssw_Sml_t * p, Aig_Obj_t * pObj0, Aig_Obj_t * pObj1, int iFrame0, int iFrame1 )
{
unsigned * pSims0, * pSims1;
int i;
assert( iFrame0 < p->nFrames );
assert( iFrame1 < p->nFrames );
assert( !Aig_IsComplement(pObj0) );
assert( !Aig_IsComplement(pObj1) );
assert( iFrame0 == 0 || p->nWordsFrame < p->nWordsTotal );
assert( iFrame1 == 0 || p->nWordsFrame < p->nWordsTotal );
// get hold of the simulation information
pSims0 = Ssw_ObjSim(p, pObj0->Id) + p->nWordsFrame * iFrame0;
pSims1 = Ssw_ObjSim(p, pObj1->Id) + p->nWordsFrame * iFrame1;
// compare
for ( i = 0; i < p->nWordsFrame; i++ )
if ( pSims0[i] != pSims1[i] )
return 0;
return 1;
}
/**Function*************************************************************
Synopsis [Simulates one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlNodeCopyFanin( Ssw_Sml_t * p, Aig_Obj_t * pObj, int iFrame )
{
unsigned * pSims, * pSims0;
int fCompl, fCompl0, i;
assert( iFrame < p->nFrames );
assert( !Aig_IsComplement(pObj) );
assert( Aig_ObjIsCo(pObj) );
assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
// get hold of the simulation information
pSims = Ssw_ObjSim(p, pObj->Id) + p->nWordsFrame * iFrame;
pSims0 = Ssw_ObjSim(p, Aig_ObjFanin0(pObj)->Id) + p->nWordsFrame * iFrame;
// get complemented attributes of the children using their random info
fCompl = pObj->fPhase;
fCompl0 = Aig_ObjPhaseReal(Aig_ObjChild0(pObj));
// copy information as it is
if ( fCompl0 )
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = ~pSims0[i];
else
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = pSims0[i];
}
/**Function*************************************************************
Synopsis [Simulates one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlNodeTransferNext( Ssw_Sml_t * p, Aig_Obj_t * pOut, Aig_Obj_t * pIn, int iFrame )
{
unsigned * pSims0, * pSims1;
int i;
assert( iFrame < p->nFrames );
assert( !Aig_IsComplement(pOut) );
assert( !Aig_IsComplement(pIn) );
assert( Aig_ObjIsCo(pOut) );
assert( Aig_ObjIsCi(pIn) );
assert( iFrame == 0 || p->nWordsFrame < p->nWordsTotal );
// get hold of the simulation information
pSims0 = Ssw_ObjSim(p, pOut->Id) + p->nWordsFrame * iFrame;
pSims1 = Ssw_ObjSim(p, pIn->Id) + p->nWordsFrame * (iFrame+1);
// copy information as it is
for ( i = 0; i < p->nWordsFrame; i++ )
pSims1[i] = pSims0[i];
}
/**Function*************************************************************
Synopsis [Simulates one node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlNodeTransferFirst( Ssw_Sml_t * p, Aig_Obj_t * pOut, Aig_Obj_t * pIn )
{
unsigned * pSims0, * pSims1;
int i;
assert( !Aig_IsComplement(pOut) );
assert( !Aig_IsComplement(pIn) );
assert( Aig_ObjIsCo(pOut) );
assert( Aig_ObjIsCi(pIn) );
assert( p->nWordsFrame < p->nWordsTotal );
// get hold of the simulation information
pSims0 = Ssw_ObjSim(p, pOut->Id) + p->nWordsFrame * (p->nFrames-1);
pSims1 = Ssw_ObjSim(p, pIn->Id);
// copy information as it is
for ( i = 0; i < p->nWordsFrame; i++ )
pSims1[i] = pSims0[i];
}
/**Function*************************************************************
Synopsis [Assings random simulation info for the PIs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlInitialize( Ssw_Sml_t * p, int fInit )
{
Aig_Obj_t * pObj;
int i;
if ( fInit )
{
assert( Aig_ManRegNum(p->pAig) > 0 );
assert( Aig_ManRegNum(p->pAig) <= Aig_ManCiNum(p->pAig) );
// assign random info for primary inputs
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_SmlAssignRandom( p, pObj );
// assign the initial state for the latches
Saig_ManForEachLo( p->pAig, pObj, i )
Ssw_SmlObjAssignConst( p, pObj, 0, 0 );
}
else
{
Aig_ManForEachCi( p->pAig, pObj, i )
Ssw_SmlAssignRandom( p, pObj );
}
}
/**Function*************************************************************
Synopsis [Assings random simulation info for the PIs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlInitializeSpecial( Ssw_Sml_t * p, Vec_Int_t * vInit )
{
Aig_Obj_t * pObj;
int Entry, i, nRegs;
nRegs = Aig_ManRegNum(p->pAig);
assert( nRegs > 0 );
assert( nRegs <= Aig_ManCiNum(p->pAig) );
assert( Vec_IntSize(vInit) == nRegs * p->nWordsFrame );
// assign random info for primary inputs
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_SmlAssignRandom( p, pObj );
// assign the initial state for the latches
Vec_IntForEachEntry( vInit, Entry, i )
Ssw_SmlObjAssignConstWord( p, Saig_ManLo(p->pAig, i % nRegs), Entry, 0, i / nRegs );
}
/**Function*************************************************************
Synopsis [Assings random simulation info for the PIs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlReinitialize( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj, * pObjLi, * pObjLo;
int i;
assert( Aig_ManRegNum(p->pAig) > 0 );
assert( Aig_ManRegNum(p->pAig) < Aig_ManCiNum(p->pAig) );
// assign random info for primary inputs
Saig_ManForEachPi( p->pAig, pObj, i )
Ssw_SmlAssignRandom( p, pObj );
// copy simulation info into the inputs
Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
Ssw_SmlNodeTransferFirst( p, pObjLi, pObjLo );
}
/**Function*************************************************************
Synopsis [Check if any of the POs becomes non-constant.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlCheckNonConstOutputs( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj;
int i;
Saig_ManForEachPo( p->pAig, pObj, i )
{
if ( p->pAig->nConstrs && i >= Saig_ManPoNum(p->pAig) - p->pAig->nConstrs )
return 0;
if ( !Ssw_SmlNodeIsZero(p, pObj) )
return 1;
}
return 0;
}
/**Function*************************************************************
Synopsis [Simulates AIG manager.]
Description [Assumes that the PI simulation info is attached.]
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlSimulateOne( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj, * pObjLi, * pObjLo;
int f, i;
clock_t clk;
clk = clock();
for ( f = 0; f < p->nFrames; f++ )
{
// simulate the nodes
Aig_ManForEachNode( p->pAig, pObj, i )
Ssw_SmlNodeSimulate( p, pObj, f );
// copy simulation info into outputs
Saig_ManForEachPo( p->pAig, pObj, i )
Ssw_SmlNodeCopyFanin( p, pObj, f );
// copy simulation info into outputs
Saig_ManForEachLi( p->pAig, pObj, i )
Ssw_SmlNodeCopyFanin( p, pObj, f );
// quit if this is the last timeframe
if ( f == p->nFrames - 1 )
break;
// copy simulation info into the inputs
Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
Ssw_SmlNodeTransferNext( p, pObjLi, pObjLo, f );
}
p->timeSim += clock() - clk;
p->nSimRounds++;
}
/**Function*************************************************************
Synopsis [Converts simulation information to be not normallized.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlUnnormalize( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj;
unsigned * pSims;
int i, k;
// convert constant 1
pSims = Ssw_ObjSim( p, 0 );
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = ~pSims[i];
// convert internal nodes
Aig_ManForEachNode( p->pAig, pObj, k )
{
if ( pObj->fPhase == 0 )
continue;
pSims = Ssw_ObjSim( p, pObj->Id );
for ( i = 0; i < p->nWordsFrame; i++ )
pSims[i] = ~pSims[i];
}
// PIs/POs are always stored in their natural state
}
/**Function*************************************************************
Synopsis [Simulates AIG manager.]
Description [Assumes that the PI simulation info is attached.]
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlSimulateOneDyn_rec( Ssw_Sml_t * p, Aig_Obj_t * pObj, int f, int * pVisited, int nVisCounter )
{
// if ( Aig_ObjIsTravIdCurrent(p->pAig, pObj) )
// return;
// Aig_ObjSetTravIdCurrent(p->pAig, pObj);
if ( pVisited[p->nFrames*pObj->Id+f] == nVisCounter )
return;
pVisited[p->nFrames*pObj->Id+f] = nVisCounter;
if ( Saig_ObjIsPi( p->pAig, pObj ) || Aig_ObjIsConst1(pObj) )
return;
if ( Saig_ObjIsLo( p->pAig, pObj ) )
{
if ( f == 0 )
return;
Ssw_SmlSimulateOneDyn_rec( p, Saig_ObjLoToLi(p->pAig, pObj), f-1, pVisited, nVisCounter );
Ssw_SmlNodeTransferNext( p, Saig_ObjLoToLi(p->pAig, pObj), pObj, f-1 );
return;
}
if ( Saig_ObjIsLi( p->pAig, pObj ) )
{
Ssw_SmlSimulateOneDyn_rec( p, Aig_ObjFanin0(pObj), f, pVisited, nVisCounter );
Ssw_SmlNodeCopyFanin( p, pObj, f );
return;
}
assert( Aig_ObjIsNode(pObj) );
Ssw_SmlSimulateOneDyn_rec( p, Aig_ObjFanin0(pObj), f, pVisited, nVisCounter );
Ssw_SmlSimulateOneDyn_rec( p, Aig_ObjFanin1(pObj), f, pVisited, nVisCounter );
Ssw_SmlNodeSimulate( p, pObj, f );
}
/**Function*************************************************************
Synopsis [Simulates AIG manager.]
Description [Assumes that the PI simulation info is attached.]
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlSimulateOneFrame( Ssw_Sml_t * p )
{
Aig_Obj_t * pObj, * pObjLi, * pObjLo;
int i;
clock_t clk;
clk = clock();
// simulate the nodes
Aig_ManForEachNode( p->pAig, pObj, i )
Ssw_SmlNodeSimulate( p, pObj, 0 );
// copy simulation info into outputs
Saig_ManForEachLi( p->pAig, pObj, i )
Ssw_SmlNodeCopyFanin( p, pObj, 0 );
// copy simulation info into the inputs
Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i )
Ssw_SmlNodeTransferNext( p, pObjLi, pObjLo, 0 );
p->timeSim += clock() - clk;
p->nSimRounds++;
}
/**Function*************************************************************
Synopsis [Allocates simulation manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Sml_t * Ssw_SmlStart( Aig_Man_t * pAig, int nPref, int nFrames, int nWordsFrame )
{
Ssw_Sml_t * p;
p = (Ssw_Sml_t *)ABC_ALLOC( char, sizeof(Ssw_Sml_t) + sizeof(unsigned) * Aig_ManObjNumMax(pAig) * (nPref + nFrames) * nWordsFrame );
memset( p, 0, sizeof(Ssw_Sml_t) + sizeof(unsigned) * (nPref + nFrames) * nWordsFrame );
p->pAig = pAig;
p->nPref = nPref;
p->nFrames = nPref + nFrames;
p->nWordsFrame = nWordsFrame;
p->nWordsTotal = (nPref + nFrames) * nWordsFrame;
p->nWordsPref = nPref * nWordsFrame;
return p;
}
/**Function*************************************************************
Synopsis [Allocates simulation manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlClean( Ssw_Sml_t * p )
{
memset( p->pData, 0, sizeof(unsigned) * Aig_ManObjNumMax(p->pAig) * p->nWordsTotal );
}
/**Function*************************************************************
Synopsis [Get simulation data.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Vec_Ptr_t * Ssw_SmlSimDataPointers( Ssw_Sml_t * p )
{
Vec_Ptr_t * vSimInfo;
Aig_Obj_t * pObj;
int i;
vSimInfo = Vec_PtrStart( Aig_ManObjNumMax(p->pAig) );
Aig_ManForEachObj( p->pAig, pObj, i )
Vec_PtrWriteEntry( vSimInfo, i, Ssw_ObjSim(p, i) );
return vSimInfo;
}
/**Function*************************************************************
Synopsis [Deallocates simulation manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlStop( Ssw_Sml_t * p )
{
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis [Performs simulation of the uninitialized circuit.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Sml_t * Ssw_SmlSimulateComb( Aig_Man_t * pAig, int nWords )
{
Ssw_Sml_t * p;
p = Ssw_SmlStart( pAig, 0, 1, nWords );
Ssw_SmlInitialize( p, 0 );
Ssw_SmlSimulateOne( p );
return p;
}
/**Function*************************************************************
Synopsis [Performs simulation of the initialized circuit.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Ssw_Sml_t * Ssw_SmlSimulateSeq( Aig_Man_t * pAig, int nPref, int nFrames, int nWords )
{
Ssw_Sml_t * p;
p = Ssw_SmlStart( pAig, nPref, nFrames, nWords );
Ssw_SmlInitialize( p, 1 );
Ssw_SmlSimulateOne( p );
p->fNonConstOut = Ssw_SmlCheckNonConstOutputs( p );
return p;
}
/**Function*************************************************************
Synopsis [Performs next round of sequential simulation.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Ssw_SmlResimulateSeq( Ssw_Sml_t * p )
{
Ssw_SmlReinitialize( p );
Ssw_SmlSimulateOne( p );
p->fNonConstOut = Ssw_SmlCheckNonConstOutputs( p );
}
/**Function*************************************************************
Synopsis [Returns the number of frames simulated in the manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNumFrames( Ssw_Sml_t * p )
{
return p->nFrames;
}
/**Function*************************************************************
Synopsis [Returns the total number of simulation words.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Ssw_SmlNumWordsTotal( Ssw_Sml_t * p )
{
return p->nWordsTotal;
}
/**Function*************************************************************
Synopsis [Returns the pointer to the simulation info of the node.]
Description [The simulation info is normalized unless procedure
Ssw_SmlUnnormalize() is called in advance.]
SideEffects []
SeeAlso []
***********************************************************************/
unsigned * Ssw_SmlSimInfo( Ssw_Sml_t * p, Aig_Obj_t * pObj )
{
assert( !Aig_IsComplement(pObj) );
return Ssw_ObjSim( p, pObj->Id );
}
/**Function*************************************************************
Synopsis [Creates sequential counter-example from the simulation info.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Cex_t * Ssw_SmlGetCounterExample( Ssw_Sml_t * p )
{
Abc_Cex_t * pCex;
Aig_Obj_t * pObj;
unsigned * pSims;
int iPo, iFrame, iBit, i, k;
// make sure the simulation manager has it
assert( p->fNonConstOut );
// find the first output that failed
iPo = -1;
iBit = -1;
iFrame = -1;
Saig_ManForEachPo( p->pAig, pObj, iPo )
{
if ( Ssw_SmlNodeIsZero(p, pObj) )
continue;
pSims = Ssw_ObjSim( p, pObj->Id );
for ( i = p->nWordsPref; i < p->nWordsTotal; i++ )
if ( pSims[i] )
{
iFrame = i / p->nWordsFrame;
iBit = 32 * (i % p->nWordsFrame) + Aig_WordFindFirstBit( pSims[i] );
break;
}
break;
}
assert( iPo < Aig_ManCoNum(p->pAig)-Aig_ManRegNum(p->pAig) );
assert( iFrame < p->nFrames );
assert( iBit < 32 * p->nWordsFrame );
// allocate the counter example
pCex = Abc_CexAlloc( Aig_ManRegNum(p->pAig), Aig_ManCiNum(p->pAig) - Aig_ManRegNum(p->pAig), iFrame + 1 );
pCex->iPo = iPo;
pCex->iFrame = iFrame;
// copy the bit data
Saig_ManForEachLo( p->pAig, pObj, k )
{
pSims = Ssw_ObjSim( p, pObj->Id );
if ( Abc_InfoHasBit( pSims, iBit ) )
Abc_InfoSetBit( pCex->pData, k );
}
for ( i = 0; i <= iFrame; i++ )
{
Saig_ManForEachPi( p->pAig, pObj, k )
{
pSims = Ssw_ObjSim( p, pObj->Id );
if ( Abc_InfoHasBit( pSims, 32 * p->nWordsFrame * i + iBit ) )
Abc_InfoSetBit( pCex->pData, pCex->nRegs + pCex->nPis * i + k );
}
}
// verify the counter example
if ( !Saig_ManVerifyCex( p->pAig, pCex ) )
{
Abc_Print( 1, "Ssw_SmlGetCounterExample(): Counter-example is invalid.\n" );
Abc_CexFree( pCex );
pCex = NULL;
}
return pCex;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END