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author | Alan Mishchenko <alanmi@berkeley.edu> | 2007-10-01 08:01:00 -0700 |
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committer | Alan Mishchenko <alanmi@berkeley.edu> | 2007-10-01 08:01:00 -0700 |
commit | 4812c90424dfc40d26725244723887a2d16ddfd9 (patch) | |
tree | b32ace96e7e2d84d586e09ba605463b6f49c3271 /src/aig/rwt/rwtDec.c | |
parent | e54d9691616b9a0326e2fdb3156bb4eeb8abfcd7 (diff) | |
download | abc-4812c90424dfc40d26725244723887a2d16ddfd9.tar.gz abc-4812c90424dfc40d26725244723887a2d16ddfd9.tar.bz2 abc-4812c90424dfc40d26725244723887a2d16ddfd9.zip |
Version abc71001
Diffstat (limited to 'src/aig/rwt/rwtDec.c')
-rw-r--r-- | src/aig/rwt/rwtDec.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/aig/rwt/rwtDec.c b/src/aig/rwt/rwtDec.c new file mode 100644 index 00000000..98019629 --- /dev/null +++ b/src/aig/rwt/rwtDec.c @@ -0,0 +1,150 @@ +/**CFile**************************************************************** + + FileName [rwtDec.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [DAG-aware AIG rewriting package.] + + Synopsis [Evaluation and decomposition procedures.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: rwtDec.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "rwt.h" +#include "deco.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +static Dec_Graph_t * Rwt_NodePreprocess( Rwt_Man_t * p, Rwt_Node_t * pNode ); +static Dec_Edge_t Rwt_TravCollect_rec( Rwt_Man_t * p, Rwt_Node_t * pNode, Dec_Graph_t * pGraph ); + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Preprocesses computed library of subgraphs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Rwt_ManPreprocess( Rwt_Man_t * p ) +{ + Dec_Graph_t * pGraph; + Rwt_Node_t * pNode; + int i, k; + // put the nodes into the structure + p->pMapInv = ALLOC( unsigned short, 222 ); + memset( p->pMapInv, 0, sizeof(unsigned short) * 222 ); + p->vClasses = Vec_VecStart( 222 ); + for ( i = 0; i < p->nFuncs; i++ ) + { + if ( p->pTable[i] == NULL ) + continue; + // consider all implementations of this function + for ( pNode = p->pTable[i]; pNode; pNode = pNode->pNext ) + { + assert( pNode->uTruth == p->pTable[i]->uTruth ); + assert( p->pMap[pNode->uTruth] >= 0 && p->pMap[pNode->uTruth] < 222 ); + Vec_VecPush( p->vClasses, p->pMap[pNode->uTruth], pNode ); + p->pMapInv[ p->pMap[pNode->uTruth] ] = p->puCanons[pNode->uTruth]; + } + } + // compute decomposition forms for each node and verify them + Vec_VecForEachEntry( p->vClasses, pNode, i, k ) + { + pGraph = Rwt_NodePreprocess( p, pNode ); + pNode->pNext = (Rwt_Node_t *)pGraph; +// assert( pNode->uTruth == (Dec_GraphDeriveTruth(pGraph) & 0xFFFF) ); + } +} + +/**Function************************************************************* + + Synopsis [Preprocesses subgraphs rooted at this node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Graph_t * Rwt_NodePreprocess( Rwt_Man_t * p, Rwt_Node_t * pNode ) +{ + Dec_Graph_t * pGraph; + Dec_Edge_t eRoot; + assert( !Rwt_IsComplement(pNode) ); + // consider constant + if ( pNode->uTruth == 0 ) + return Dec_GraphCreateConst0(); + // consider the case of elementary var + if ( pNode->uTruth == 0x00FF ) + return Dec_GraphCreateLeaf( 3, 4, 1 ); + // start the subgraphs + pGraph = Dec_GraphCreate( 4 ); + // collect the nodes + Rwt_ManIncTravId( p ); + eRoot = Rwt_TravCollect_rec( p, pNode, pGraph ); + Dec_GraphSetRoot( pGraph, eRoot ); + return pGraph; +} + +/**Function************************************************************* + + Synopsis [Adds one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Dec_Edge_t Rwt_TravCollect_rec( Rwt_Man_t * p, Rwt_Node_t * pNode, Dec_Graph_t * pGraph ) +{ + Dec_Edge_t eNode0, eNode1, eNode; + // elementary variable + if ( pNode->fUsed ) + return Dec_EdgeCreate( pNode->Id - 1, 0 ); + // previously visited node + if ( pNode->TravId == p->nTravIds ) + return Dec_IntToEdge( pNode->Volume ); + pNode->TravId = p->nTravIds; + // solve for children + eNode0 = Rwt_TravCollect_rec( p, Rwt_Regular(pNode->p0), pGraph ); + if ( Rwt_IsComplement(pNode->p0) ) + eNode0.fCompl = !eNode0.fCompl; + eNode1 = Rwt_TravCollect_rec( p, Rwt_Regular(pNode->p1), pGraph ); + if ( Rwt_IsComplement(pNode->p1) ) + eNode1.fCompl = !eNode1.fCompl; + // create the decomposition node(s) + if ( pNode->fExor ) + eNode = Dec_GraphAddNodeXor( pGraph, eNode0, eNode1, 0 ); + else + eNode = Dec_GraphAddNodeAnd( pGraph, eNode0, eNode1 ); + // save the result + pNode->Volume = Dec_EdgeToInt( eNode ); + return eNode; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |