/**CFile****************************************************************
FileName [ifMan.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [FPGA mapping based on priority cuts.]
Synopsis [Mapping manager.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - November 21, 2006.]
Revision [$Id: ifMan.c,v 1.00 2006/11/21 00:00:00 alanmi Exp $]
***********************************************************************/
#include "if.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static If_Obj_t * If_ManSetupObj( If_Man_t * p );
static void If_ManCutSetRecycle( If_Man_t * p, If_Set_t * pSet ) { pSet->pNext = p->pFreeList; p->pFreeList = pSet; }
static If_Set_t * If_ManCutSetFetch( If_Man_t * p ) { If_Set_t * pTemp = p->pFreeList; p->pFreeList = p->pFreeList->pNext; return pTemp; }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Starts the AIG manager.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Man_t * If_ManStart( If_Par_t * pPars )
{
If_Man_t * p;
// start the manager
p = ABC_ALLOC( If_Man_t, 1 );
memset( p, 0, sizeof(If_Man_t) );
p->pPars = pPars;
p->fEpsilon = pPars->Epsilon;
// allocate arrays for nodes
p->vCis = Vec_PtrAlloc( 100 );
p->vCos = Vec_PtrAlloc( 100 );
p->vObjs = Vec_PtrAlloc( 100 );
// p->vMapped = Vec_PtrAlloc( 100 );
p->vTemp = Vec_PtrAlloc( 100 );
// prepare the memory manager
p->nTruthWords = p->pPars->fTruth? If_CutTruthWords( p->pPars->nLutSize ) : 0;
p->nPermWords = p->pPars->fUsePerm? If_CutPermWords( p->pPars->nLutSize ) : 0;
p->nObjBytes = sizeof(If_Obj_t) + sizeof(int) * (p->pPars->nLutSize + p->nPermWords + p->nTruthWords);
p->nCutBytes = sizeof(If_Cut_t) + sizeof(int) * (p->pPars->nLutSize + p->nPermWords + p->nTruthWords);
p->nSetBytes = sizeof(If_Set_t) + (sizeof(If_Cut_t *) + p->nCutBytes) * (p->pPars->nCutsMax + 1);
p->pMemObj = Mem_FixedStart( p->nObjBytes );
// p->pMemSet = Mem_FixedStart( p->nSetBytes );
// report expected memory usage
if ( p->pPars->fVerbose )
Abc_Print( 1, "K = %d. Memory (bytes): Truth = %4d. Cut = %4d. Obj = %4d. Set = %4d.\n",
p->pPars->nLutSize, 4 * p->nTruthWords, p->nCutBytes, p->nObjBytes, p->nSetBytes );
// room for temporary truth tables
p->puTemp[0] = p->pPars->fTruth? ABC_ALLOC( unsigned, 4 * p->nTruthWords ) : NULL;
p->puTemp[1] = p->puTemp[0] + p->nTruthWords;
p->puTemp[2] = p->puTemp[1] + p->nTruthWords;
p->puTemp[3] = p->puTemp[2] + p->nTruthWords;
// create the constant node
p->pConst1 = If_ManSetupObj( p );
p->pConst1->Type = IF_CONST1;
p->pConst1->fPhase = 1;
p->nObjs[IF_CONST1]++;
return p;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManRestart( If_Man_t * p )
{
ABC_FREE( p->pMemCi );
Vec_PtrClear( p->vCis );
Vec_PtrClear( p->vCos );
Vec_PtrClear( p->vObjs );
// Vec_PtrClear( p->vMapped );
Vec_PtrClear( p->vTemp );
Mem_FixedRestart( p->pMemObj );
// create the constant node
p->pConst1 = If_ManSetupObj( p );
p->pConst1->Type = IF_CONST1;
p->pConst1->fPhase = 1;
// reset the counter of other nodes
p->nObjs[IF_CI] = p->nObjs[IF_CO] = p->nObjs[IF_AND] = 0;
}
/**Function*************************************************************
Synopsis []
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManStop( If_Man_t * p )
{
{
// extern void If_CluHashFindMedian( If_Man_t * p );
// extern void If_CluHashTableCheck( If_Man_t * p );
// If_CluHashFindMedian( p );
// If_CluHashTableCheck( p );
}
if ( p->pPars->fVerbose && p->nCutsUselessAll )
{
int i;
for ( i = 0; i <= 16; i++ )
if ( p->nCutsUseless[i] )
Abc_Print( 1, "Useless cuts %2d = %9d (out of %9d) (%6.2f %%)\n", i, p->nCutsUseless[i], p->nCutsCount[i], 100.0*p->nCutsUseless[i]/(p->nCutsCount[i]+1) );
Abc_Print( 1, "Useless cuts all = %9d (out of %9d) (%6.2f %%)\n", p->nCutsUselessAll, p->nCutsCountAll, 100.0*p->nCutsUselessAll/(p->nCutsCountAll+1) );
}
// Abc_PrintTime( 1, "Truth", p->timeTruth );
// Abc_Print( 1, "Small support = %d.\n", p->nSmallSupp );
Vec_IntFreeP( &p->vCoAttrs );
Vec_PtrFree( p->vCis );
Vec_PtrFree( p->vCos );
Vec_PtrFree( p->vObjs );
// Vec_PtrFree( p->vMapped );
Vec_PtrFree( p->vTemp );
if ( p->vObjsRev ) Vec_PtrFree( p->vObjsRev );
if ( p->vLatchOrder ) Vec_PtrFree( p->vLatchOrder );
if ( p->vLags ) Vec_IntFree( p->vLags );
Mem_FixedStop( p->pMemObj, 0 );
ABC_FREE( p->pMemCi );
ABC_FREE( p->pMemAnd );
ABC_FREE( p->puTemp[0] );
// free pars memory
if ( p->pPars->pTimesArr )
ABC_FREE( p->pPars->pTimesArr );
if ( p->pPars->pTimesReq )
ABC_FREE( p->pPars->pTimesReq );
if ( p->pManTim )
Tim_ManStop( p->pManTim );
if ( p->vSwitching )
Vec_IntFree( p->vSwitching );
// hash table
// if ( p->pPars->fVerbose && p->nTableEntries[0] )
// printf( "Hash table 2: Entries = %7d. Size = %7d.\n", p->nTableEntries[0], p->nTableSize[0] );
// if ( p->pPars->fVerbose && p->nTableEntries[1] )
// printf( "Hash table 3: Entries = %7d. Size = %7d.\n", p->nTableEntries[1], p->nTableSize[1] );
ABC_FREE( p->pHashTable[0] );
ABC_FREE( p->pHashTable[1] );
if ( p->pMemEntries )
Mem_FixedStop( p->pMemEntries, 0 );
ABC_FREE( p );
}
/**Function*************************************************************
Synopsis [Creates primary input.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManCreateCi( If_Man_t * p )
{
If_Obj_t * pObj;
pObj = If_ManSetupObj( p );
pObj->Type = IF_CI;
pObj->IdPio = Vec_PtrSize( p->vCis );
Vec_PtrPush( p->vCis, pObj );
p->nObjs[IF_CI]++;
return pObj;
}
/**Function*************************************************************
Synopsis [Creates primary output with the given driver.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManCreateCo( If_Man_t * p, If_Obj_t * pDriver )
{
If_Obj_t * pObj;
pObj = If_ManSetupObj( p );
pObj->IdPio = Vec_PtrSize( p->vCos );
Vec_PtrPush( p->vCos, pObj );
pObj->Type = IF_CO;
pObj->fCompl0 = If_IsComplement(pDriver); pDriver = If_Regular(pDriver);
pObj->pFanin0 = pDriver; pDriver->nRefs++;
pObj->fPhase = (pObj->fCompl0 ^ pDriver->fPhase);
pObj->Level = pDriver->Level;
if ( p->nLevelMax < (int)pObj->Level )
p->nLevelMax = (int)pObj->Level;
p->nObjs[IF_CO]++;
return pObj;
}
/**Function*************************************************************
Synopsis [Create the new node assuming it does not exist.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManCreateAnd( If_Man_t * p, If_Obj_t * pFan0, If_Obj_t * pFan1 )
{
If_Obj_t * pObj;
// perform constant propagation
if ( pFan0 == pFan1 )
return pFan0;
if ( pFan0 == If_Not(pFan1) )
return If_Not(p->pConst1);
if ( If_Regular(pFan0) == p->pConst1 )
return pFan0 == p->pConst1 ? pFan1 : If_Not(p->pConst1);
if ( If_Regular(pFan1) == p->pConst1 )
return pFan1 == p->pConst1 ? pFan0 : If_Not(p->pConst1);
// get memory for the new object
pObj = If_ManSetupObj( p );
pObj->Type = IF_AND;
pObj->fCompl0 = If_IsComplement(pFan0); pFan0 = If_Regular(pFan0);
pObj->fCompl1 = If_IsComplement(pFan1); pFan1 = If_Regular(pFan1);
pObj->pFanin0 = pFan0; pFan0->nRefs++; pFan0->nVisits++; pFan0->nVisitsCopy++;
pObj->pFanin1 = pFan1; pFan1->nRefs++; pFan1->nVisits++; pFan1->nVisitsCopy++;
pObj->fPhase = (pObj->fCompl0 ^ pFan0->fPhase) & (pObj->fCompl1 ^ pFan1->fPhase);
pObj->Level = 1 + IF_MAX( pFan0->Level, pFan1->Level );
if ( p->nLevelMax < (int)pObj->Level )
p->nLevelMax = (int)pObj->Level;
p->nObjs[IF_AND]++;
return pObj;
}
/**Function*************************************************************
Synopsis [Create the new node assuming it does not exist.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManCreateXor( If_Man_t * p, If_Obj_t * pFan0, If_Obj_t * pFan1 )
{
If_Obj_t * pRes1, * pRes2;
pRes1 = If_ManCreateAnd( p, If_Not(pFan0), pFan1 );
pRes2 = If_ManCreateAnd( p, pFan0, If_Not(pFan1) );
return If_Not( If_ManCreateAnd( p, If_Not(pRes1), If_Not(pRes2) ) );
}
/**Function*************************************************************
Synopsis [Create the new node assuming it does not exist.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManCreateMux( If_Man_t * p, If_Obj_t * pFan0, If_Obj_t * pFan1, If_Obj_t * pCtrl )
{
If_Obj_t * pRes1, * pRes2;
pRes1 = If_ManCreateAnd( p, pFan0, If_Not(pCtrl) );
pRes2 = If_ManCreateAnd( p, pFan1, pCtrl );
return If_Not( If_ManCreateAnd( p, If_Not(pRes1), If_Not(pRes2) ) );
}
/**Function*************************************************************
Synopsis [Creates the choice node.]
Description [Should be called after the equivalence class nodes are linked.]
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManCreateChoice( If_Man_t * p, If_Obj_t * pObj )
{
If_Obj_t * pTemp;
// mark the node as a representative if its class
assert( pObj->fRepr == 0 );
pObj->fRepr = 1;
// update the level of this node (needed for correct required time computation)
for ( pTemp = pObj; pTemp; pTemp = pTemp->pEquiv )
{
pObj->Level = IF_MAX( pObj->Level, pTemp->Level );
pTemp->nVisits++; pTemp->nVisitsCopy++;
}
// mark the largest level
if ( p->nLevelMax < (int)pObj->Level )
p->nLevelMax = (int)pObj->Level;
}
/**Function*************************************************************
Synopsis [Prepares memory for one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetupCut( If_Man_t * p, If_Cut_t * pCut )
{
memset( pCut, 0, sizeof(If_Cut_t) );
pCut->nLimit = p->pPars->nLutSize;
pCut->pLeaves = (int *)(pCut + 1);
if ( p->pPars->fUsePerm )
pCut->pPerm = (char *)(pCut->pLeaves + p->pPars->nLutSize);
if ( p->pPars->fTruth )
pCut->pTruth = (unsigned *)pCut->pLeaves + p->pPars->nLutSize + p->nPermWords;
}
/**Function*************************************************************
Synopsis [Prepares memory for one cutset.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetupSet( If_Man_t * p, If_Set_t * pSet )
{
char * pArray;
int i;
pSet->nCuts = 0;
pSet->nCutsMax = p->pPars->nCutsMax;
pSet->ppCuts = (If_Cut_t **)(pSet + 1);
pArray = (char *)pSet->ppCuts + sizeof(If_Cut_t *) * (pSet->nCutsMax+1);
for ( i = 0; i <= pSet->nCutsMax; i++ )
{
pSet->ppCuts[i] = (If_Cut_t *)(pArray + i * p->nCutBytes);
If_ManSetupCut( p, pSet->ppCuts[i] );
}
// pArray += (pSet->nCutsMax + 1) * p->nCutBytes;
// assert( ((char *)pArray) - ((char *)pSet) == p->nSetBytes );
}
/**Function*************************************************************
Synopsis [Prepares memory for one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetupCutTriv( If_Man_t * p, If_Cut_t * pCut, int ObjId )
{
pCut->fCompl = 0;
pCut->nLimit = p->pPars->nLutSize;
pCut->nLeaves = 1;
pCut->pLeaves[0] = p->pPars->fLiftLeaves? (ObjId << 8) : ObjId;
pCut->uSign = If_ObjCutSign( pCut->pLeaves[0] );
// set up elementary truth table of the unit cut
if ( p->pPars->fTruth )
{
int i, nTruthWords;
nTruthWords = pCut->nLimit <= 5 ? 1 : (1 << (pCut->nLimit - 5));
for ( i = 0; i < nTruthWords; i++ )
If_CutTruth(pCut)[i] = 0xAAAAAAAA;
}
assert( pCut->pLeaves[0] < p->vObjs->nSize );
}
/**Function*************************************************************
Synopsis [Prepares memory for the node with cuts.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
If_Obj_t * If_ManSetupObj( If_Man_t * p )
{
If_Obj_t * pObj;
// get memory for the object
pObj = (If_Obj_t *)Mem_FixedEntryFetch( p->pMemObj );
memset( pObj, 0, sizeof(If_Obj_t) );
If_ManSetupCut( p, &pObj->CutBest );
// assign ID and save
pObj->Id = Vec_PtrSize(p->vObjs);
Vec_PtrPush( p->vObjs, pObj );
// set the required times
pObj->Required = IF_FLOAT_LARGE;
return pObj;
}
/**Function*************************************************************
Synopsis [Prepares memory for one cut.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetupCiCutSets( If_Man_t * p )
{
If_Obj_t * pObj;
int i;
assert( p->pMemCi == NULL );
// create elementary cuts for the CIs
If_ManForEachCi( p, pObj, i )
If_ManSetupCutTriv( p, &pObj->CutBest, pObj->Id );
// create elementary cutsets for the CIs
p->pMemCi = (If_Set_t *)ABC_ALLOC( char, If_ManCiNum(p) * (sizeof(If_Set_t) + sizeof(void *)) );
If_ManForEachCi( p, pObj, i )
{
pObj->pCutSet = (If_Set_t *)((char *)p->pMemCi + i * (sizeof(If_Set_t) + sizeof(void *)));
pObj->pCutSet->nCuts = 1;
pObj->pCutSet->nCutsMax = p->pPars->nCutsMax;
pObj->pCutSet->ppCuts = (If_Cut_t **)(pObj->pCutSet + 1);
pObj->pCutSet->ppCuts[0] = &pObj->CutBest;
}
}
/**Function*************************************************************
Synopsis [Prepares cutset of the node.]
Description [Elementary cutset will be added last.]
SideEffects []
SeeAlso []
***********************************************************************/
If_Set_t * If_ManSetupNodeCutSet( If_Man_t * p, If_Obj_t * pObj )
{
assert( If_ObjIsAnd(pObj) );
assert( pObj->pCutSet == NULL );
// pObj->pCutSet = (If_Set_t *)Mem_FixedEntryFetch( p->pMemSet );
// If_ManSetupSet( p, pObj->pCutSet );
pObj->pCutSet = If_ManCutSetFetch( p );
pObj->pCutSet->nCuts = 0;
pObj->pCutSet->nCutsMax = p->pPars->nCutsMax;
return pObj->pCutSet;
}
/**Function*************************************************************
Synopsis [Dereferences cutset of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManDerefNodeCutSet( If_Man_t * p, If_Obj_t * pObj )
{
If_Obj_t * pFanin;
assert( If_ObjIsAnd(pObj) );
// consider the node
assert( pObj->nVisits >= 0 );
if ( pObj->nVisits == 0 )
{
// Mem_FixedEntryRecycle( p->pMemSet, (char *)pObj->pCutSet );
If_ManCutSetRecycle( p, pObj->pCutSet );
pObj->pCutSet = NULL;
}
// consider the first fanin
pFanin = If_ObjFanin0(pObj);
assert( pFanin->nVisits > 0 );
if ( !If_ObjIsCi(pFanin) && --pFanin->nVisits == 0 )
{
// Mem_FixedEntryRecycle( p->pMemSet, (char *)pFanin->pCutSet );
If_ManCutSetRecycle( p, pFanin->pCutSet );
pFanin->pCutSet = NULL;
}
// consider the second fanin
pFanin = If_ObjFanin1(pObj);
assert( pFanin->nVisits > 0 );
if ( !If_ObjIsCi(pFanin) && --pFanin->nVisits == 0 )
{
// Mem_FixedEntryRecycle( p->pMemSet, (char *)pFanin->pCutSet );
If_ManCutSetRecycle( p, pFanin->pCutSet );
pFanin->pCutSet = NULL;
}
}
/**Function*************************************************************
Synopsis [Dereferences cutset of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManDerefChoiceCutSet( If_Man_t * p, If_Obj_t * pObj )
{
If_Obj_t * pTemp;
assert( If_ObjIsAnd(pObj) );
assert( pObj->fRepr );
assert( pObj->nVisits > 0 );
// consider the nodes in the choice class
for ( pTemp = pObj; pTemp; pTemp = pTemp->pEquiv )
{
// assert( pTemp == pObj || pTemp->nVisits == 1 );
if ( --pTemp->nVisits == 0 )
{
// Mem_FixedEntryRecycle( p->pMemSet, (char *)pTemp->pCutSet );
If_ManCutSetRecycle( p, pTemp->pCutSet );
pTemp->pCutSet = NULL;
}
}
}
/**Function*************************************************************
Synopsis [Dereferences cutset of the node.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void If_ManSetupSetAll( If_Man_t * p, int nCrossCut )
{
If_Set_t * pCutSet;
int i, nCutSets;
nCutSets = 128 + nCrossCut;
p->pFreeList = p->pMemAnd = pCutSet = (If_Set_t *)ABC_ALLOC( char, nCutSets * p->nSetBytes );
for ( i = 0; i < nCutSets; i++ )
{
If_ManSetupSet( p, pCutSet );
if ( i == nCutSets - 1 )
pCutSet->pNext = NULL;
else
pCutSet->pNext = (If_Set_t *)( (char *)pCutSet + p->nSetBytes );
pCutSet = pCutSet->pNext;
}
assert( pCutSet == NULL );
if ( p->pPars->fVerbose )
{
Abc_Print( 1, "Node = %7d. Ch = %5d. Total mem = %7.2f Mb. Peak cut mem = %7.2f Mb.\n",
If_ManAndNum(p), p->nChoices,
1.0 * (p->nObjBytes + 2*sizeof(void *)) * If_ManObjNum(p) / (1<<20),
1.0 * p->nSetBytes * nCrossCut / (1<<20) );
}
// Abc_Print( 1, "Cross cut = %d.\n", nCrossCut );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END