/**CFile****************************************************************
FileName [ifCut.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [FPGA mapping based on priority cuts.]
Synopsis [Cut computation.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 21, 2006.]
Revision [$Id: ifCut.c,v 1.00 2006/11/21 00:00:00 alanmi Exp $]
***********************************************************************/
#include "if.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Check correctness of cuts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int If_CutVerifyCut( If_Cut_t * pBase, If_Cut_t * pCut ) // check if pCut is contained in pBase
{
int nSizeB = pBase->nLeaves;
int nSizeC = pCut->nLeaves;
int * pB = pBase->pLeaves;
int * pC = pCut->pLeaves;
int i, k;
for ( i = 0; i < nSizeC; i++ )
{
for ( k = 0; k < nSizeB; k++ )
if ( pC[i] == pB[k] )
break;
if ( k == nSizeB )
return 0;
}
return 1;
}
int If_CutVerifyCuts( If_Set_t * pCutSet, int fOrdered )
{
static int Count = 0;
If_Cut_t * pCut0, * pCut1;
int i, k, m, n, Value;
assert( pCutSet->nCuts > 0 );
for ( i = 0; i < pCutSet->nCuts; i++ )
{
pCut0 = pCutSet->ppCuts[i];
assert( pCut0->uSign == If_ObjCutSignCompute(pCut0) );
if ( fOrdered )
{
// check duplicates
for ( m = 1; m < (int)pCut0->nLeaves; m++ )
assert( pCut0->pLeaves[m-1] < pCut0->pLeaves[m] );
}
else
{
// check duplicates
for ( m = 0; m < (int)pCut0->nLeaves; m++ )
for ( n = m+1; n < (int)pCut0->nLeaves; n++ )
assert( pCut0->pLeaves[m] != pCut0->pLeaves[n] );
}
// check pairs
for ( k = 0; k < pCutSet->nCuts; k++ )
{
pCut1 = pCutSet->ppCuts[k];
if ( pCut0 == pCut1 )
continue;
Count++;
// check containments
Value = If_CutVerifyCut( pCut0, pCut1 );
// assert( Value == 0 );
if ( Value )
{
assert( pCut0->uSign == If_ObjCutSignCompute(pCut0) );
assert( pCut1->uSign == If_ObjCutSignCompute(pCut1) );
If_CutPrint( pCut0 );
If_CutPrint( pCut1 );
assert( 0 );
}
}
}
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if pDom is contained in pCut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int If_CutCheckDominance( If_Cut_t * pDom, If_Cut_t * pCut )
{
int i, k;
assert( pDom->nLeaves <= pCut->nLeaves );
for ( i = 0; i < (int)pDom->nLeaves; i++ )
{
for ( k = 0; k < (int)pCut->nLeaves; k++ )
if ( pDom->pLeaves[i] == pCut->pLeaves[k] )
break;
if ( k == (int)pCut->nLeaves ) // node i in pDom is not contained in pCut
return 0;
}
// every node in pDom is contained in pCut
return 1;
}
/**Function*************************************************************
Synopsis [Returns 1 if the cut is contained.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutFilter( If_Set_t * pCutSet, If_Cut_t * pCut, int fSaveCut0 )
{
If_Cut_t * pTemp;
int i, k;
assert( pCutSet->ppCuts[pCutSet->nCuts] == pCut );
for ( i = 0; i < pCutSet->nCuts; i++ )
{
pTemp = pCutSet->ppCuts[i];
if ( pTemp->nLeaves > pCut->nLeaves )
{
// do not fiter the first cut
if ( i == 0 && ((pCutSet->nCuts > 1 && pCutSet->ppCuts[1]->fUseless) || (fSaveCut0 && pCutSet->nCuts == 1)) )
continue;
// skip the non-contained cuts
if ( (pTemp->uSign & pCut->uSign) != pCut->uSign )
continue;
// check containment seriously
if ( If_CutCheckDominance( pCut, pTemp ) )
{
// p->ppCuts[i] = p->ppCuts[p->nCuts-1];
// p->ppCuts[p->nCuts-1] = pTemp;
// p->nCuts--;
// i--;
// remove contained cut
for ( k = i; k < pCutSet->nCuts; k++ )
pCutSet->ppCuts[k] = pCutSet->ppCuts[k+1];
pCutSet->ppCuts[pCutSet->nCuts] = pTemp;
pCutSet->nCuts--;
i--;
}
}
else
{
// skip the non-contained cuts
if ( (pTemp->uSign & pCut->uSign) != pTemp->uSign )
continue;
// check containment seriously
if ( If_CutCheckDominance( pTemp, pCut ) )
return 1;
}
}
return 0;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutMergeOrdered_( If_Man_t * p, If_Cut_t * pC0, If_Cut_t * pC1, If_Cut_t * pC )
{
int nSizeC0 = pC0->nLeaves;
int nSizeC1 = pC1->nLeaves;
int nLimit = pC0->nLimit;
int i, k, c, s;
// both cuts are the largest
if ( nSizeC0 == nLimit && nSizeC1 == nLimit )
{
for ( i = 0; i < nSizeC0; i++ )
{
if ( pC0->pLeaves[i] != pC1->pLeaves[i] )
return 0;
p->pPerm[0][i] = p->pPerm[1][i] = p->pPerm[2][i] = i;
pC->pLeaves[i] = pC0->pLeaves[i];
}
pC->nLeaves = nLimit;
pC->uSign = pC0->uSign | pC1->uSign;
p->uSharedMask = Abc_InfoMask( nLimit );
return 1;
}
// compare two cuts with different numbers
i = k = c = s = 0;
p->uSharedMask = 0;
if ( nSizeC0 == 0 ) goto FlushCut1;
if ( nSizeC1 == 0 ) goto FlushCut0;
while ( 1 )
{
if ( c == nLimit ) return 0;
if ( pC0->pLeaves[i] < pC1->pLeaves[k] )
{
p->pPerm[0][i] = c;
pC->pLeaves[c++] = pC0->pLeaves[i++];
if ( i == nSizeC0 ) goto FlushCut1;
}
else if ( pC0->pLeaves[i] > pC1->pLeaves[k] )
{
p->pPerm[1][k] = c;
pC->pLeaves[c++] = pC1->pLeaves[k++];
if ( k == nSizeC1 ) goto FlushCut0;
}
else
{
p->uSharedMask |= (1 << c);
p->pPerm[0][i] = p->pPerm[1][k] = p->pPerm[2][s++] = c;
pC->pLeaves[c++] = pC0->pLeaves[i++]; k++;
if ( i == nSizeC0 ) goto FlushCut1;
if ( k == nSizeC1 ) goto FlushCut0;
}
}
FlushCut0:
if ( c + nSizeC0 > nLimit + i ) return 0;
while ( i < nSizeC0 )
{
p->pPerm[0][i] = c;
pC->pLeaves[c++] = pC0->pLeaves[i++];
}
pC->nLeaves = c;
pC->uSign = pC0->uSign | pC1->uSign;
assert( c > 0 );
return 1;
FlushCut1:
if ( c + nSizeC1 > nLimit + k ) return 0;
while ( k < nSizeC1 )
{
p->pPerm[1][k] = c;
pC->pLeaves[c++] = pC1->pLeaves[k++];
}
pC->nLeaves = c;
pC->uSign = pC0->uSign | pC1->uSign;
assert( c > 0 );
return 1;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutMergeOrdered( If_Man_t * p, If_Cut_t * pC0, If_Cut_t * pC1, If_Cut_t * pC )
{
int nSizeC0 = pC0->nLeaves;
int nSizeC1 = pC1->nLeaves;
int nLimit = pC0->nLimit;
int i, k, c, s;
// both cuts are the largest
if ( nSizeC0 == nLimit && nSizeC1 == nLimit )
{
for ( i = 0; i < nSizeC0; i++ )
{
if ( pC0->pLeaves[i] != pC1->pLeaves[i] )
return 0;
pC->pLeaves[i] = pC0->pLeaves[i];
}
pC->nLeaves = nLimit;
pC->uSign = pC0->uSign | pC1->uSign;
return 1;
}
// compare two cuts with different numbers
i = k = c = s = 0;
if ( nSizeC0 == 0 ) goto FlushCut1;
if ( nSizeC1 == 0 ) goto FlushCut0;
while ( 1 )
{
if ( c == nLimit ) return 0;
if ( pC0->pLeaves[i] < pC1->pLeaves[k] )
{
pC->pLeaves[c++] = pC0->pLeaves[i++];
if ( i == nSizeC0 ) goto FlushCut1;
}
else if ( pC0->pLeaves[i] > pC1->pLeaves[k] )
{
pC->pLeaves[c++] = pC1->pLeaves[k++];
if ( k == nSizeC1 ) goto FlushCut0;
}
else
{
pC->pLeaves[c++] = pC0->pLeaves[i++]; k++;
if ( i == nSizeC0 ) goto FlushCut1;
if ( k == nSizeC1 ) goto FlushCut0;
}
}
FlushCut0:
if ( c + nSizeC0 > nLimit + i ) return 0;
while ( i < nSizeC0 )
pC->pLeaves[c++] = pC0->pLeaves[i++];
pC->nLeaves = c;
pC->uSign = pC0->uSign | pC1->uSign;
return 1;
FlushCut1:
if ( c + nSizeC1 > nLimit + k ) return 0;
while ( k < nSizeC1 )
pC->pLeaves[c++] = pC1->pLeaves[k++];
pC->nLeaves = c;
pC->uSign = pC0->uSign | pC1->uSign;
return 1;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutMerge( If_Man_t * p, If_Cut_t * pCut0, If_Cut_t * pCut1, If_Cut_t * pCut )
{
int nLutSize = pCut0->nLimit;
int nSize0 = pCut0->nLeaves;
int nSize1 = pCut1->nLeaves;
int * pC0 = pCut0->pLeaves;
int * pC1 = pCut1->pLeaves;
int * pC = pCut->pLeaves;
int i, k, c;
// compare two cuts with different numbers
c = nSize0;
for ( i = 0; i < nSize1; i++ )
{
for ( k = 0; k < nSize0; k++ )
if ( pC1[i] == pC0[k] )
break;
if ( k < nSize0 )
{
p->pPerm[1][i] = k;
continue;
}
if ( c == nLutSize )
return 0;
p->pPerm[1][i] = c;
pC[c++] = pC1[i];
}
for ( i = 0; i < nSize0; i++ )
pC[i] = pC0[i];
pCut->nLeaves = c;
pCut->uSign = pCut0->uSign | pCut1->uSign;
return 1;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutCompareDelay( If_Man_t * p, If_Cut_t ** ppC0, If_Cut_t ** ppC1 )
{
If_Cut_t * pC0 = *ppC0;
If_Cut_t * pC1 = *ppC1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutCompareDelayOld( If_Man_t * p, If_Cut_t ** ppC0, If_Cut_t ** ppC1 )
{
If_Cut_t * pC0 = *ppC0;
If_Cut_t * pC1 = *ppC1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Prepares the object for FPGA mapping.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutCompareArea( If_Man_t * p, If_Cut_t ** ppC0, If_Cut_t ** ppC1 )
{
If_Cut_t * pC0 = *ppC0;
If_Cut_t * pC1 = *ppC1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
// if ( pC0->AveRefs > pC1->AveRefs )
// return -1;
// if ( pC0->AveRefs < pC1->AveRefs )
// return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Comparison function for two cuts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int If_ManSortCompare( If_Man_t * p, If_Cut_t * pC0, If_Cut_t * pC1 )
{
if ( p->pPars->fPower )
{
if ( p->SortMode == 1 ) // area flow
{
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
//Abc_Print( 1,"area(%.2f, %.2f), power(%.2f, %.2f), edge(%.2f, %.2f)\n",
// pC0->Area, pC1->Area, pC0->Power, pC1->Power, pC0->Edge, pC1->Edge);
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
// if ( pC0->AveRefs > pC1->AveRefs )
// return -1;
// if ( pC0->AveRefs < pC1->AveRefs )
// return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
return 0;
}
if ( p->SortMode == 0 ) // delay
{
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
return 0;
}
assert( p->SortMode == 2 ); // delay old, exact area
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
return 0;
}
else // regular
{
if ( p->SortMode == 1 ) // area
{
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
// if ( pC0->AveRefs > pC1->AveRefs )
// return -1;
// if ( pC0->AveRefs < pC1->AveRefs )
// return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->fUseless < pC1->fUseless )
return -1;
if ( pC0->fUseless > pC1->fUseless )
return 1;
return 0;
}
if ( p->SortMode == 0 ) // delay
{
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
if ( pC0->fUseless < pC1->fUseless )
return -1;
if ( pC0->fUseless > pC1->fUseless )
return 1;
return 0;
}
assert( p->SortMode == 2 ); // delay old
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->fUseless < pC1->fUseless )
return -1;
if ( pC0->fUseless > pC1->fUseless )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->Edge < pC1->Edge - p->fEpsilon )
return -1;
if ( pC0->Edge > pC1->Edge + p->fEpsilon )
return 1;
if ( pC0->Power < pC1->Power - p->fEpsilon )
return -1;
if ( pC0->Power > pC1->Power + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
return 0;
}
}
/**Function*************************************************************
Synopsis [Comparison function for two cuts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
static inline int If_ManSortCompare_old( If_Man_t * p, If_Cut_t * pC0, If_Cut_t * pC1 )
{
if ( p->SortMode == 1 ) // area
{
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
// if ( pC0->AveRefs > pC1->AveRefs )
// return -1;
// if ( pC0->AveRefs < pC1->AveRefs )
// return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
return 0;
}
if ( p->SortMode == 0 ) // delay
{
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
return 0;
}
assert( p->SortMode == 2 ); // delay old
if ( pC0->Delay < pC1->Delay - p->fEpsilon )
return -1;
if ( pC0->Delay > pC1->Delay + p->fEpsilon )
return 1;
if ( pC0->Area < pC1->Area - p->fEpsilon )
return -1;
if ( pC0->Area > pC1->Area + p->fEpsilon )
return 1;
if ( pC0->nLeaves < pC1->nLeaves )
return -1;
if ( pC0->nLeaves > pC1->nLeaves )
return 1;
return 0;
}
/**Function*************************************************************
Synopsis [Performs incremental sorting of cuts.]
Description [Currently only the trivial sorting is implemented.]
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutSort( If_Man_t * p, If_Set_t * pCutSet, If_Cut_t * pCut )
{
// int Counter = 0;
int i;
// the new cut is the last one
assert( pCutSet->ppCuts[pCutSet->nCuts] == pCut );
assert( pCutSet->nCuts <= pCutSet->nCutsMax );
// cut structure is empty
if ( pCutSet->nCuts == 0 )
{
pCutSet->nCuts++;
return;
}
if ( !pCut->fUseless &&
(p->pPars->fUseDsd || p->pPars->pFuncCell2 || p->pPars->fUseBat ||
p->pPars->pLutStruct || p->pPars->fUserRecLib || p->pPars->fUserSesLib ||
p->pPars->fEnableCheck07 || p->pPars->fUseCofVars || p->pPars->fUseAndVars || p->pPars->fUse34Spec ||
p->pPars->fUseDsdTune || p->pPars->fEnableCheck75 || p->pPars->fEnableCheck75u || p->pPars->fUseCheck1 || p->pPars->fUseCheck2) )
{
If_Cut_t * pFirst = pCutSet->ppCuts[0];
if ( pFirst->fUseless || If_ManSortCompare(p, pFirst, pCut) == 1 )
{
pCutSet->ppCuts[0] = pCut;
pCutSet->ppCuts[pCutSet->nCuts] = pFirst;
If_CutSort( p, pCutSet, pFirst );
return;
}
}
// the cut will be added - find its place
for ( i = pCutSet->nCuts-1; i >= 0; i-- )
{
// Counter++;
if ( If_ManSortCompare( p, pCutSet->ppCuts[i], pCut ) <= 0 || (i == 0 && !pCutSet->ppCuts[0]->fUseless && pCut->fUseless) )
break;
pCutSet->ppCuts[i+1] = pCutSet->ppCuts[i];
pCutSet->ppCuts[i] = pCut;
}
// Abc_Print( 1, "%d ", Counter );
// update the number of cuts
if ( pCutSet->nCuts < pCutSet->nCutsMax )
pCutSet->nCuts++;
}
/**Function*************************************************************
Synopsis [Orders the leaves of the cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutOrder( If_Cut_t * pCut )
{
int i, Temp, fChanges;
do {
fChanges = 0;
for ( i = 0; i < (int)pCut->nLeaves - 1; i++ )
{
assert( pCut->pLeaves[i] != pCut->pLeaves[i+1] );
if ( pCut->pLeaves[i] <= pCut->pLeaves[i+1] )
continue;
Temp = pCut->pLeaves[i];
pCut->pLeaves[i] = pCut->pLeaves[i+1];
pCut->pLeaves[i+1] = Temp;
fChanges = 1;
}
} while ( fChanges );
}
/**Function*************************************************************
Synopsis [Checks correctness of the cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutCheck( If_Cut_t * pCut )
{
int i;
assert( pCut->nLeaves <= pCut->nLimit );
if ( pCut->nLeaves < 2 )
return 1;
for ( i = 1; i < (int)pCut->nLeaves; i++ )
{
if ( pCut->pLeaves[i-1] >= pCut->pLeaves[i] )
{
Abc_Print( -1, "If_CutCheck(): Cut has wrong ordering of inputs.\n" );
return 0;
}
assert( pCut->pLeaves[i-1] < pCut->pLeaves[i] );
}
return 1;
}
/**Function*************************************************************
Synopsis [Prints one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutPrint( If_Cut_t * pCut )
{
unsigned i;
Abc_Print( 1, "{" );
for ( i = 0; i < pCut->nLeaves; i++ )
Abc_Print( 1, " %s%d", If_CutLeafBit(pCut, i) ? "!":"", pCut->pLeaves[i] );
Abc_Print( 1, " }\n" );
}
/**Function*************************************************************
Synopsis [Prints one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutPrintTiming( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
unsigned i;
Abc_Print( 1, "{" );
If_CutForEachLeaf( p, pCut, pLeaf, i )
Abc_Print( 1, " %d(%.2f/%.2f)", pLeaf->Id, If_ObjCutBest(pLeaf)->Delay, pLeaf->Required );
Abc_Print( 1, " }\n" );
}
/**Function*************************************************************
Synopsis [Moves the cut over the latch.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutLift( If_Cut_t * pCut )
{
unsigned i;
for ( i = 0; i < pCut->nLeaves; i++ )
{
assert( (pCut->pLeaves[i] & 255) < 255 );
pCut->pLeaves[i]++;
}
}
/**Function*************************************************************
Synopsis [Computes area flow.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAreaFlow( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Flow, AddOn;
int i;
Flow = If_CutLutArea(p, pCut);
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
if ( pLeaf->nRefs == 0 || If_ObjIsConst1(pLeaf) )
AddOn = If_ObjCutBest(pLeaf)->Area;
else
{
assert( pLeaf->EstRefs > p->fEpsilon );
AddOn = If_ObjCutBest(pLeaf)->Area / pLeaf->EstRefs;
}
if ( Flow >= (float)1e32 || AddOn >= (float)1e32 )
Flow = (float)1e32;
else
{
Flow += AddOn;
if ( Flow > (float)1e32 )
Flow = (float)1e32;
}
}
return Flow;
}
/**Function*************************************************************
Synopsis [Computes area flow.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutEdgeFlow( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Flow, AddOn;
int i;
Flow = pCut->nLeaves;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
if ( pLeaf->nRefs == 0 || If_ObjIsConst1(pLeaf) )
AddOn = If_ObjCutBest(pLeaf)->Edge;
else
{
assert( pLeaf->EstRefs > p->fEpsilon );
AddOn = If_ObjCutBest(pLeaf)->Edge / pLeaf->EstRefs;
}
if ( Flow >= (float)1e32 || AddOn >= (float)1e32 )
Flow = (float)1e32;
else
{
Flow += AddOn;
if ( Flow > (float)1e32 )
Flow = (float)1e32;
}
}
return Flow;
}
/**Function*************************************************************
Synopsis [Computes area flow.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutPowerFlow( If_Man_t * p, If_Cut_t * pCut, If_Obj_t * pRoot )
{
If_Obj_t * pLeaf;
float * pSwitching = (float *)p->vSwitching->pArray;
float Power = 0;
int i;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
Power += pSwitching[pLeaf->Id];
if ( pLeaf->nRefs == 0 || If_ObjIsConst1(pLeaf) )
Power += If_ObjCutBest(pLeaf)->Power;
else
{
assert( pLeaf->EstRefs > p->fEpsilon );
Power += If_ObjCutBest(pLeaf)->Power / pLeaf->EstRefs;
}
}
return Power;
}
/**Function*************************************************************
Synopsis [Average number of references of the leaves.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAverageRefs( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
int nRefsTotal, i;
nRefsTotal = 0;
If_CutForEachLeaf( p, pCut, pLeaf, i )
nRefsTotal += pLeaf->nRefs;
return ((float)nRefsTotal)/pCut->nLeaves;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAreaDeref( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Area;
int i;
Area = If_CutLutArea(p, pCut);
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
assert( pLeaf->nRefs > 0 );
if ( --pLeaf->nRefs > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Area += If_CutAreaDeref( p, If_ObjCutBest(pLeaf) );
}
return Area;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAreaRef( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Area;
int i;
Area = If_CutLutArea(p, pCut);
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
assert( pLeaf->nRefs >= 0 );
if ( pLeaf->nRefs++ > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Area += If_CutAreaRef( p, If_ObjCutBest(pLeaf) );
}
return Area;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAreaDerefed( If_Man_t * p, If_Cut_t * pCut )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return 0;
aResult2 = If_CutAreaRef( p, pCut );
aResult = If_CutAreaDeref( p, pCut );
assert( aResult > aResult2 - 3*p->fEpsilon );
assert( aResult < aResult2 + 3*p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutAreaRefed( If_Man_t * p, If_Cut_t * pCut )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return 0;
aResult2 = If_CutAreaDeref( p, pCut );
aResult = If_CutAreaRef( p, pCut );
// assert( aResult > aResult2 - p->fEpsilon );
// assert( aResult < aResult2 + p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutEdgeDeref( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Edge;
int i;
Edge = pCut->nLeaves;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
assert( pLeaf->nRefs > 0 );
if ( --pLeaf->nRefs > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Edge += If_CutEdgeDeref( p, If_ObjCutBest(pLeaf) );
}
return Edge;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutEdgeRef( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
float Edge;
int i;
Edge = pCut->nLeaves;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
assert( pLeaf->nRefs >= 0 );
if ( pLeaf->nRefs++ > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Edge += If_CutEdgeRef( p, If_ObjCutBest(pLeaf) );
}
return Edge;
}
/**Function*************************************************************
Synopsis [Computes edge of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutEdgeDerefed( If_Man_t * p, If_Cut_t * pCut )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return pCut->nLeaves;
aResult2 = If_CutEdgeRef( p, pCut );
aResult = If_CutEdgeDeref( p, pCut );
// assert( aResult > aResult2 - 3*p->fEpsilon );
// assert( aResult < aResult2 + 3*p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutEdgeRefed( If_Man_t * p, If_Cut_t * pCut )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return pCut->nLeaves;
aResult2 = If_CutEdgeDeref( p, pCut );
aResult = If_CutEdgeRef( p, pCut );
// assert( aResult > aResult2 - p->fEpsilon );
// assert( aResult < aResult2 + p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutPowerDeref( If_Man_t * p, If_Cut_t * pCut, If_Obj_t * pRoot )
{
If_Obj_t * pLeaf;
float * pSwitching = (float *)p->vSwitching->pArray;
float Power = 0;
int i;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
Power += pSwitching[pLeaf->Id];
assert( pLeaf->nRefs > 0 );
if ( --pLeaf->nRefs > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Power += If_CutPowerDeref( p, If_ObjCutBest(pLeaf), pRoot );
}
return Power;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutPowerRef( If_Man_t * p, If_Cut_t * pCut, If_Obj_t * pRoot )
{
If_Obj_t * pLeaf;
float * pSwitching = (float *)p->vSwitching->pArray;
float Power = 0;
int i;
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
Power += pSwitching[pLeaf->Id];
assert( pLeaf->nRefs >= 0 );
if ( pLeaf->nRefs++ > 0 || !If_ObjIsAnd(pLeaf) )
continue;
Power += If_CutPowerRef( p, If_ObjCutBest(pLeaf), pRoot );
}
return Power;
}
/**Function*************************************************************
Synopsis [Computes Power of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutPowerDerefed( If_Man_t * p, If_Cut_t * pCut, If_Obj_t * pRoot )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return 0;
aResult2 = If_CutPowerRef( p, pCut, pRoot );
aResult = If_CutPowerDeref( p, pCut, pRoot );
assert( aResult > aResult2 - p->fEpsilon );
assert( aResult < aResult2 + p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes area of the first level.]
Description [The cut need to be derefed.]
SideEffects []
SeeAlso []
***********************************************************************/
float If_CutPowerRefed( If_Man_t * p, If_Cut_t * pCut, If_Obj_t * pRoot )
{
float aResult, aResult2;
if ( pCut->nLeaves < 2 )
return 0;
aResult2 = If_CutPowerDeref( p, pCut, pRoot );
aResult = If_CutPowerRef( p, pCut, pRoot );
assert( aResult > aResult2 - p->fEpsilon );
assert( aResult < aResult2 + p->fEpsilon );
return aResult;
}
/**Function*************************************************************
Synopsis [Computes the cone of the cut in AIG with choices.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutGetCutMinLevel( If_Man_t * p, If_Cut_t * pCut )
{
If_Obj_t * pLeaf;
int i, nMinLevel = IF_INFINITY;
If_CutForEachLeaf( p, pCut, pLeaf, i )
nMinLevel = IF_MIN( nMinLevel, (int)pLeaf->Level );
return nMinLevel;
}
/**Function*************************************************************
Synopsis [Computes the cone of the cut in AIG with choices.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutGetCone_rec( If_Man_t * p, If_Obj_t * pObj, If_Cut_t * pCut )
{
If_Obj_t * pTemp;
int i, RetValue;
// check if the node is in the cut
for ( i = 0; i < (int)pCut->nLeaves; i++ )
if ( pCut->pLeaves[i] == pObj->Id )
return 1;
else if ( pCut->pLeaves[i] > pObj->Id )
break;
// return if we reached the boundary
if ( If_ObjIsCi(pObj) )
return 0;
// check the choice node
for ( pTemp = pObj; pTemp; pTemp = pTemp->pEquiv )
{
// check if the node itself is bound
RetValue = If_CutGetCone_rec( p, If_ObjFanin0(pTemp), pCut );
if ( RetValue )
RetValue &= If_CutGetCone_rec( p, If_ObjFanin1(pTemp), pCut );
if ( RetValue )
return 1;
}
return 0;
}
/**Function*************************************************************
Synopsis [Computes the cone of the cut in AIG with choices.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutGetCones( If_Man_t * p )
{
If_Obj_t * pObj;
int i, Counter = 0;
abctime clk = Abc_Clock();
If_ManForEachObj( p, pObj, i )
{
if ( If_ObjIsAnd(pObj) && pObj->nRefs )
{
Counter += !If_CutGetCone_rec( p, pObj, If_ObjCutBest(pObj) );
// Abc_Print( 1, "%d ", If_CutGetCutMinLevel( p, If_ObjCutBest(pObj) ) );
}
}
Abc_Print( 1, "Cound not find boundary for %d nodes.\n", Counter );
Abc_PrintTime( 1, "Cones", Abc_Clock() - clk );
return 1;
}
/**Function*************************************************************
Synopsis [Computes the cone of the cut in AIG with choices.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_CutFoundFanins_rec( If_Obj_t * pObj, Vec_Int_t * vLeaves )
{
if ( pObj->nRefs || If_ObjIsCi(pObj) )
{
Vec_IntPushUnique( vLeaves, pObj->Id );
return;
}
If_CutFoundFanins_rec( If_ObjFanin0(pObj), vLeaves );
If_CutFoundFanins_rec( If_ObjFanin1(pObj), vLeaves );
}
/**Function*************************************************************
Synopsis [Computes the cone of the cut in AIG with choices.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutCountTotalFanins( If_Man_t * p )
{
If_Obj_t * pObj;
Vec_Int_t * vLeaves;
int i, nFaninsTotal = 0, Counter = 0;
abctime clk = Abc_Clock();
vLeaves = Vec_IntAlloc( 100 );
If_ManForEachObj( p, pObj, i )
{
if ( If_ObjIsAnd(pObj) && pObj->nRefs )
{
nFaninsTotal += If_ObjCutBest(pObj)->nLeaves;
Vec_IntClear( vLeaves );
If_CutFoundFanins_rec( If_ObjFanin0(pObj), vLeaves );
If_CutFoundFanins_rec( If_ObjFanin1(pObj), vLeaves );
Counter += Vec_IntSize(vLeaves);
}
}
Abc_Print( 1, "Total cut inputs = %d. Total fanins incremental = %d.\n", nFaninsTotal, Counter );
Abc_PrintTime( 1, "Fanins", Abc_Clock() - clk );
Vec_IntFree( vLeaves );
return 1;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int If_CutFilter2_rec( If_Man_t * p, If_Obj_t * pObj, int LevelMin )
{
char * pVisited = Vec_StrEntryP(p->vMarks, pObj->Id);
if ( *pVisited )
return *pVisited;
Vec_IntPush( p->vVisited2, pObj->Id );
if ( (int)pObj->Level <= LevelMin )
return (*pVisited = 1);
if ( If_CutFilter2_rec( p, pObj->pFanin0, LevelMin ) == 1 )
return (*pVisited = 1);
if ( If_CutFilter2_rec( p, pObj->pFanin1, LevelMin ) == 1 )
return (*pVisited = 1);
return (*pVisited = 2);
}
int If_CutFilter2( If_Man_t * p, If_Obj_t * pNode, If_Cut_t * pCut )
{
If_Obj_t * pLeaf, * pTemp; int i, Count = 0;
// printf( "Considering node %d and cut {", pNode->Id );
// If_CutForEachLeaf( p, pCut, pLeaf, i )
// printf( " %d", pLeaf->Id );
// printf( " }\n" );
If_CutForEachLeaf( p, pCut, pLeaf, i )
{
int k, iObj, RetValue, nLevelMin = ABC_INFINITY;
Vec_IntClear( p->vVisited2 );
If_CutForEachLeaf( p, pCut, pTemp, k )
{
if ( pTemp == pLeaf )
continue;
nLevelMin = Abc_MinInt( nLevelMin, (int)pTemp->Level );
assert( Vec_StrEntry(p->vMarks, pTemp->Id) == 0 );
Vec_StrWriteEntry( p->vMarks, pTemp->Id, 2 );
Vec_IntPush( p->vVisited2, pTemp->Id );
}
RetValue = If_CutFilter2_rec( p, pLeaf, nLevelMin );
Vec_IntForEachEntry( p->vVisited2, iObj, k )
Vec_StrWriteEntry( p->vMarks, iObj, 0 );
if ( RetValue == 2 )
{
Count++;
pCut->nLeaves--;
for ( k = i; k < (int)pCut->nLeaves; k++ )
pCut->pLeaves[k] = pCut->pLeaves[k+1];
i--;
}
}
//if ( Count )
// printf( "%d", Count );
return 0;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END