diff options
Diffstat (limited to 'src/temp/ivy/ivySeq.c')
| -rw-r--r-- | src/temp/ivy/ivySeq.c | 407 |
1 files changed, 364 insertions, 43 deletions
diff --git a/src/temp/ivy/ivySeq.c b/src/temp/ivy/ivySeq.c index d8fbdd9b..1cfa8c4b 100644 --- a/src/temp/ivy/ivySeq.c +++ b/src/temp/ivy/ivySeq.c @@ -24,13 +24,33 @@ /// DECLARATIONS /// //////////////////////////////////////////////////////////////////////// +static inline int Ivy_CutHashValue( int NodeId ) { return 1 << (NodeId % 31); } + //////////////////////////////////////////////////////////////////////// /// FUNCTION DEFINITIONS /// //////////////////////////////////////////////////////////////////////// /**Function************************************************************* - Synopsis [Converts a combinational AIG manager into a sequential one.] + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ + + + + + + + +/**Function************************************************************* + + Synopsis [Derives new cut.] Description [] @@ -39,59 +59,360 @@ SeeAlso [] ***********************************************************************/ -void Ivy_ManMakeSeq( Ivy_Man_t * p, int nLatches ) +static inline int Ivy_CutDeriveNew( Ivy_Cut_t * pCut, Ivy_Cut_t * pCutNew, int IdOld, int IdNew0, int IdNew1 ) { - Vec_Int_t * vNodes; - Ivy_Obj_t * pObj, * pObjNew, * pFan0, * pFan1; - int i, fChanges; - assert( nLatches < Ivy_ManPiNum(p) && nLatches < Ivy_ManPoNum(p) ); - // change POs into buffers - assert( Ivy_ManPoNum(p) == Vec_IntSize(p->vPos) ); - for ( i = Ivy_ManPoNum(p) - nLatches; i < Vec_IntSize(p->vPos); i++ ) + unsigned uHash = 0; + int i, k; + assert( pCut->nSize > 0 ); + assert( IdNew0 < IdNew1 ); + for ( i = k = 0; i < pCut->nSize; i++ ) { - pObj = Ivy_ManPo(p, i); - pObj->Type = IVY_BUF; + if ( pCut->pArray[i] == IdOld ) + continue; + if ( IdNew0 >= 0 ) + { + if ( IdNew0 <= pCut->pArray[i] ) + { + if ( IdNew0 < pCut->pArray[i] ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); + } + IdNew0 = -1; + } + } + if ( IdNew1 >= 0 ) + { + if ( IdNew1 <= pCut->pArray[i] ) + { + if ( IdNew1 < pCut->pArray[i] ) + { + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + IdNew1 = -1; + } + } + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = pCut->pArray[i]; + uHash |= Ivy_CutHashValue( pCut->pArray[i] ); } - // change PIs into latches and connect them to the corresponding POs - assert( Ivy_ManPiNum(p) == Vec_IntSize(p->vPis) ); - for ( i = Ivy_ManPiNum(p) - nLatches; i < Vec_IntSize(p->vPis); i++ ) + if ( IdNew0 >= 0 ) { - pObj = Ivy_ManPi(p, i); - pObj->Type = IVY_LATCH; - Ivy_ObjConnect( pObj, Ivy_ManPo(p, Ivy_ManPoNum(p) - Ivy_ManPiNum(p)) ); + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew0; + uHash |= Ivy_CutHashValue( IdNew0 ); } - // shrink the array - Vec_IntShrink( p->vPis, Ivy_ManPiNum(p) - nLatches ); - Vec_IntShrink( p->vPos, Ivy_ManPoNum(p) - nLatches ); - // update the counters of different objects - p->nObjs[IVY_PI] -= nLatches; - p->nObjs[IVY_PO] -= nLatches; - p->nObjs[IVY_BUF] += nLatches; - p->nObjs[IVY_LATCH] += nLatches; - // perform structural hashing while there are changes - fChanges = 1; - while ( fChanges ) + if ( IdNew1 >= 0 ) { - fChanges = 0; - vNodes = Ivy_ManDfs( p ); - Ivy_ManForEachNodeVec( p, vNodes, pObj, i ) + if ( k == pCut->nSizeMax ) + return 0; + pCutNew->pArray[ k++ ] = IdNew1; + uHash |= Ivy_CutHashValue( IdNew1 ); + } + pCutNew->nSize = k; + pCutNew->uHash = uHash; + assert( pCutNew->nSize <= pCut->nSizeMax ); + for ( i = 1; i < pCutNew->nSize; i++ ) + assert( pCutNew->pArray[i-1] < pCutNew->pArray[i] ); + return 1; +} + +/**Function************************************************************* + + Synopsis [Returns 1 if pDom is contained in pCut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutCheckDominance( Ivy_Cut_t * pDom, Ivy_Cut_t * pCut ) +{ + int i, k; + for ( i = 0; i < pDom->nSize; i++ ) + { + assert( i==0 || pDom->pArray[i-1] < pDom->pArray[i] ); + for ( k = 0; k < pCut->nSize; k++ ) + if ( pDom->pArray[i] == pCut->pArray[k] ) + break; + if ( k == pCut->nSize ) // node i in pDom is not contained in pCut + return 0; + } + // every node in pDom is contained in pCut + return 1; +} + +/**Function************************************************************* + + Synopsis [Check if the cut exists.] + + Description [Returns 1 if the cut exists.] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Ivy_CutFindOrAddFilter( Ivy_Store_t * pCutStore, Ivy_Cut_t * pCutNew ) +{ + Ivy_Cut_t * pCut; + int i, k; + assert( pCutNew->uHash ); + // try to find the cut + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + if ( pCut->nSize == pCutNew->nSize ) + { + if ( pCut->uHash == pCutNew->uHash ) + { + for ( k = 0; k < pCutNew->nSize; k++ ) + if ( pCut->pArray[k] != pCutNew->pArray[k] ) + break; + if ( k == pCutNew->nSize ) + return 1; + } + continue; + } + if ( pCut->nSize < pCutNew->nSize ) { - if ( Ivy_ObjIsBuf(pObj) ) + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCut->uHash ) continue; - pFan0 = Ivy_NodeRealFanin_rec( pObj, 0 ); - pFan1 = Ivy_NodeRealFanin_rec( pObj, 1 ); - if ( Ivy_ObjIsAnd(pObj) ) - pObjNew = Ivy_And(pFan0, pFan1); - else if ( Ivy_ObjIsExor(pObj) ) - pObjNew = Ivy_Exor(pFan0, pFan1); - else assert( 0 ); - if ( pObjNew == pObj ) + // check containment seriously + if ( Ivy_CutCheckDominance( pCut, pCutNew ) ) + return 1; + continue; + } + // check potential containment of other cut + + // skip the non-contained cuts + if ( (pCut->uHash & pCutNew->uHash) != pCutNew->uHash ) + continue; + // check containment seriously + if ( Ivy_CutCheckDominance( pCutNew, pCut ) ) + { + // remove the current cut + pCut->nSize = 0; + } + } + assert( pCutStore->nCuts < pCutStore->nCutsMax ); + // add the cut + pCut = pCutStore->pCuts + pCutStore->nCuts++; + *pCut = *pCutNew; + return 0; +} + +/**Function************************************************************* + + Synopsis [Compresses the cut representation.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutCompactAll( Ivy_Store_t * pCutStore ) +{ + Ivy_Cut_t * pCut; + int i, k; + pCutStore->nCutsM = 0; + for ( i = k = 0; i < pCutStore->nCuts; i++ ) + { + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + if ( pCut->nSize < pCut->nSizeMax ) + pCutStore->nCutsM++; + pCutStore->pCuts[k++] = *pCut; + } + pCutStore->nCuts = k; +} + +/**Function************************************************************* + + Synopsis [Print the cut.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutPrintForNode( Ivy_Cut_t * pCut ) +{ + int i; + assert( pCut->nSize > 0 ); + printf( "%d : {", pCut->nSize ); + for ( i = 0; i < pCut->nSize; i++ ) + printf( " %d", pCut->pArray[i] ); + printf( " }\n" ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutPrintForNodes( Ivy_Store_t * pCutStore ) +{ + int i; + printf( "Node %d\n", pCutStore->pCuts[0].pArray[0] ); + for ( i = 0; i < pCutStore->nCuts; i++ ) + Ivy_CutPrintForNode( pCutStore->pCuts + i ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline int Ivy_CutReadLeaf( Ivy_Obj_t * pFanin ) +{ + assert( !Ivy_IsComplement(pFanin) ); + if ( !Ivy_ObjIsLatch(pFanin) ) + return Ivy_LeafCreate( pFanin->Id, 0 ); + return 1 + Ivy_CutReadLeaf( Ivy_ObjFanin0(pFanin) ); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ivy_Store_t * Ivy_CutComputeForNode( Ivy_Man_t * p, Ivy_Obj_t * pObj, int nLeaves ) +{ + static Ivy_Store_t CutStore, * pCutStore = &CutStore; + Ivy_Cut_t CutNew, * pCutNew = &CutNew, * pCut; + Ivy_Man_t * pMan = p; + Ivy_Obj_t * pLeaf; + int i, k, Temp, nLats, iLeaf0, iLeaf1; + + assert( nLeaves <= IVY_CUT_INPUT ); + + // start the structure + pCutStore->nCuts = 0; + pCutStore->nCutsMax = IVY_CUT_LIMIT; + // start the trivial cut + pCutNew->uHash = 0; + pCutNew->nSize = 1; + pCutNew->nSizeMax = nLeaves; + pCutNew->pArray[0] = Ivy_LeafCreate( pObj->Id, 0 ); + pCutNew->uHash = Ivy_CutHashValue( pCutNew->pArray[0] ); + // add the trivial cut + pCutStore->pCuts[pCutStore->nCuts++] = *pCutNew; + assert( pCutStore->nCuts == 1 ); + + // explore the cuts + for ( i = 0; i < pCutStore->nCuts; i++ ) + { + // expand this cut + pCut = pCutStore->pCuts + i; + if ( pCut->nSize == 0 ) + continue; + for ( k = 0; k < pCut->nSize; k++ ) + { + pLeaf = Ivy_ManObj( p, Ivy_LeafId(pCut->pArray[k]) ); + if ( Ivy_ObjIsCi(pLeaf) ) continue; - Ivy_ObjReplace( pObj, pObjNew, 1, 1 ); - fChanges = 1; + assert( Ivy_ObjIsNode(pLeaf) ); + nLats = Ivy_LeafLat(pCut->pArray[k]); + // get the fanins fanins + iLeaf0 = nLats + Ivy_CutReadLeaf( Ivy_ObjFanin0(pLeaf) ); + iLeaf1 = nLats + Ivy_CutReadLeaf( Ivy_ObjFanin1(pLeaf) ); + if ( iLeaf0 > iLeaf1 ) + Temp = iLeaf0, iLeaf0 = iLeaf1, iLeaf1 = Temp; + // create the new cut + if ( !Ivy_CutDeriveNew( pCut, pCutNew, pCut->pArray[k], iLeaf0, iLeaf1 ) ) + continue; + // add the cut + Ivy_CutFindOrAddFilter( pCutStore, pCutNew ); + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; } - Vec_IntFree( vNodes ); + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + break; + } + if ( pCutStore->nCuts == IVY_CUT_LIMIT ) + pCutStore->fSatur = 1; + else + pCutStore->fSatur = 0; +// printf( "%d ", pCutStore->nCuts ); + Ivy_CutCompactAll( pCutStore ); +// printf( "%d \n", pCutStore->nCuts ); +// Ivy_CutPrintForNodes( pCutStore ); + return pCutStore; +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ivy_CutComputeAll( Ivy_Man_t * p, int nInputs ) +{ + Ivy_Store_t * pStore; + Ivy_Obj_t * pObj; + int i, nCutsTotal, nCutsTotalM, nNodeTotal, nNodeOver; + int clk = clock(); + if ( nInputs > IVY_CUT_INPUT ) + { + printf( "Cannot compute cuts for more than %d inputs.\n", IVY_CUT_INPUT ); + return; + } + nNodeTotal = nNodeOver = 0; + nCutsTotal = nCutsTotalM = -Ivy_ManNodeNum(p); + Ivy_ManForEachObj( p, pObj, i ) + { + if ( !Ivy_ObjIsNode(pObj) ) + continue; + pStore = Ivy_CutComputeForNode( p, pObj, nInputs ); + nCutsTotal += pStore->nCuts; + nCutsTotalM += pStore->nCutsM; + nNodeOver += pStore->fSatur; + nNodeTotal++; } + printf( "All = %6d. Minus = %6d. Triv = %6d. Node = %6d. Satur = %6d. ", + nCutsTotal, nCutsTotalM, Ivy_ManPiNum(p) + Ivy_ManNodeNum(p), nNodeTotal, nNodeOver ); + PRT( "Time", clock() - clk ); } //////////////////////////////////////////////////////////////////////// |