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/**CFile****************************************************************
FileName [fraSec.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [New FRAIG package.]
Synopsis [Performs SEC based on seq sweeping.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 30, 2007.]
Revision [$Id: fraSec.c,v 1.00 2007/06/30 00:00:00 alanmi Exp $]
***********************************************************************/
#include "fra.h"
#include "ioa.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Fra_FraigSec( Aig_Man_t * p, int nFramesMax, int fRetimeFirst, int fFraiging, int fVerbose, int fVeryVerbose )
{
Fra_Ssw_t Pars, * pPars = &Pars;
Fra_Sml_t * pSml;
Aig_Man_t * pNew, * pTemp;
int nFrames, RetValue, nIter, clk, clkTotal = clock();
int fLatchCorr = 0;
// try the miter before solving
RetValue = Fra_FraigMiterStatus( p );
if ( RetValue == 0 || RetValue == 1 )
goto finish;
// prepare parameters
memset( pPars, 0, sizeof(Fra_Ssw_t) );
pPars->fLatchCorr = fLatchCorr;
pPars->fVerbose = fVeryVerbose;
pNew = Aig_ManDup( p );
if ( fVerbose )
{
printf( "Original miter: Latches = %5d. Nodes = %6d.\n",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
}
//Aig_ManDumpBlif( pNew, "after.blif", NULL, NULL );
// perform sequential cleanup
clk = clock();
if ( pNew->nRegs )
pNew = Aig_ManReduceLaches( pNew, 0 );
if ( pNew->nRegs )
pNew = Aig_ManConstReduce( pNew, 0 );
if ( fVerbose )
{
printf( "Sequential cleanup: Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
// perform forward retiming
if ( fRetimeFirst && pNew->nRegs )
{
clk = clock();
pNew = Rtm_ManRetime( pTemp = pNew, 1, 1000, 0 );
Aig_ManStop( pTemp );
if ( fVerbose )
{
printf( "Forward retiming: Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
}
// run latch correspondence
clk = clock();
if ( pNew->nRegs )
{
pNew = Aig_ManDupOrdered( pTemp = pNew );
// pNew = Aig_ManDupDfs( pTemp = pNew );
Aig_ManStop( pTemp );
pNew = Fra_FraigLatchCorrespondence( pTemp = pNew, 0, 100000, 1, fVeryVerbose, &nIter );
p->pSeqModel = pTemp->pSeqModel; pTemp->pSeqModel = NULL;
Aig_ManStop( pTemp );
if ( pNew == NULL )
{
RetValue = 0;
printf( "Networks are NOT EQUIVALENT after simulation. " );
PRT( "Time", clock() - clkTotal );
return RetValue;
}
if ( fVerbose )
{
printf( "Latch-corr (I=%3d): Latches = %5d. Nodes = %6d. ",
nIter, Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
}
// perform fraiging
if ( fFraiging )
{
clk = clock();
pNew = Fra_FraigEquivence( pTemp = pNew, 100, 0 );
Aig_ManStop( pTemp );
if ( fVerbose )
{
printf( "Fraiging: Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
}
// perform seq sweeping while increasing the number of frames
RetValue = Fra_FraigMiterStatus( pNew );
if ( RetValue == -1 )
for ( nFrames = 1; nFrames <= nFramesMax; nFrames *= 2 )
{
clk = clock();
pPars->nFramesK = nFrames;
pNew = Fra_FraigInduction( pTemp = pNew, pPars );
Aig_ManStop( pTemp );
RetValue = Fra_FraigMiterStatus( pNew );
if ( fVerbose )
{
printf( "K-step (K=%2d,I=%3d): Latches = %5d. Nodes = %6d. ",
nFrames, pPars->nIters, Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
if ( RetValue != -1 )
break;
// perform rewriting
clk = clock();
pNew = Aig_ManDupOrdered( pTemp = pNew );
Aig_ManStop( pTemp );
pNew = Dar_ManRewriteDefault( pTemp = pNew );
Aig_ManStop( pTemp );
if ( fVerbose )
{
printf( "Rewriting: Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
// perform retiming
if ( fRetimeFirst && pNew->nRegs )
// if ( pNew->nRegs )
{
clk = clock();
pNew = Rtm_ManRetime( pTemp = pNew, 1, 1000, 0 );
Aig_ManStop( pTemp );
pNew = Aig_ManDupOrdered( pTemp = pNew );
Aig_ManStop( pTemp );
if ( fVerbose )
{
printf( "Forward retiming: Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
}
if ( pNew->nRegs )
pNew = Aig_ManConstReduce( pNew, 0 );
// perform sequential simulation
if ( pNew->nRegs )
{
clk = clock();
pSml = Fra_SmlSimulateSeq( pNew, 0, 128 * nFrames, 1 + 16/(1+Aig_ManNodeNum(pNew)/1000) );
if ( fVerbose )
{
printf( "Seq simulation : Latches = %5d. Nodes = %6d. ",
Aig_ManRegNum(pNew), Aig_ManNodeNum(pNew) );
PRT( "Time", clock() - clk );
}
if ( pSml->fNonConstOut )
{
p->pSeqModel = Fra_SmlGetCounterExample( pSml );
Fra_SmlStop( pSml );
Aig_ManStop( pNew );
RetValue = 0;
printf( "Networks are NOT EQUIVALENT after simulation. " );
PRT( "Time", clock() - clkTotal );
return RetValue;
}
Fra_SmlStop( pSml );
}
}
// get the miter status
RetValue = Fra_FraigMiterStatus( pNew );
finish:
// report the miter
if ( RetValue == 1 )
{
printf( "Networks are equivalent. " );
PRT( "Time", clock() - clkTotal );
}
else if ( RetValue == 0 )
{
printf( "Networks are NOT EQUIVALENT. " );
PRT( "Time", clock() - clkTotal );
}
else
{
static int Counter = 1;
char pFileName[1000];
printf( "Networks are UNDECIDED. " );
PRT( "Time", clock() - clkTotal );
sprintf( pFileName, "sm%03d.aig", Counter++ );
Ioa_WriteAiger( pNew, pFileName, 0, 0 );
printf( "The unsolved reduced miter is written into file \"%s\".\n", pFileName );
}
Aig_ManStop( pNew );
return RetValue;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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