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Diffstat (limited to 'src/proof/ssw/sswAig.c')
-rw-r--r-- | src/proof/ssw/sswAig.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/src/proof/ssw/sswAig.c b/src/proof/ssw/sswAig.c new file mode 100644 index 00000000..8ab99f83 --- /dev/null +++ b/src/proof/ssw/sswAig.c @@ -0,0 +1,259 @@ +/**CFile**************************************************************** + + FileName [sswAig.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Inductive prover with constraints.] + + Synopsis [AIG manipulation.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - September 1, 2008.] + + Revision [$Id: sswAig.c,v 1.00 2008/09/01 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "sswInt.h" + +ABC_NAMESPACE_IMPL_START + + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Starts the SAT manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Ssw_Frm_t * Ssw_FrmStart( Aig_Man_t * pAig ) +{ + Ssw_Frm_t * p; + p = ABC_ALLOC( Ssw_Frm_t, 1 ); + memset( p, 0, sizeof(Ssw_Frm_t) ); + p->pAig = pAig; + p->nObjs = Aig_ManObjNumMax( pAig ); + p->nFrames = 0; + p->pFrames = NULL; + p->vAig2Frm = Vec_PtrAlloc( 0 ); + Vec_PtrFill( p->vAig2Frm, 2 * p->nObjs, NULL ); + return p; +} + +/**Function************************************************************* + + Synopsis [Starts the SAT manager.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Ssw_FrmStop( Ssw_Frm_t * p ) +{ + if ( p->pFrames ) + Aig_ManStop( p->pFrames ); + Vec_PtrFree( p->vAig2Frm ); + ABC_FREE( p ); +} + +/**Function************************************************************* + + Synopsis [Performs speculative reduction for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +static inline void Ssw_FramesConstrainNode( Ssw_Man_t * p, Aig_Man_t * pFrames, Aig_Man_t * pAig, Aig_Obj_t * pObj, int iFrame, int fTwoPos ) +{ + Aig_Obj_t * pObjNew, * pObjNew2, * pObjRepr, * pObjReprNew, * pMiter; + // skip nodes without representative + pObjRepr = Aig_ObjRepr(pAig, pObj); + if ( pObjRepr == NULL ) + return; + p->nConstrTotal++; + assert( pObjRepr->Id < pObj->Id ); + // get the new node + pObjNew = Ssw_ObjFrame( p, pObj, iFrame ); + // get the new node of the representative + pObjReprNew = Ssw_ObjFrame( p, pObjRepr, iFrame ); + // if this is the same node, no need to add constraints + if ( pObj->fPhase == pObjRepr->fPhase ) + { + assert( pObjNew != Aig_Not(pObjReprNew) ); + if ( pObjNew == pObjReprNew ) + return; + } + else + { + assert( pObjNew != pObjReprNew ); + if ( pObjNew == Aig_Not(pObjReprNew) ) + return; + } + p->nConstrReduced++; + // these are different nodes - perform speculative reduction + pObjNew2 = Aig_NotCond( pObjReprNew, pObj->fPhase ^ pObjRepr->fPhase ); + // set the new node + Ssw_ObjSetFrame( p, pObj, iFrame, pObjNew2 ); + // add the constraint + if ( fTwoPos ) + { + Aig_ObjCreatePo( pFrames, pObjNew2 ); + Aig_ObjCreatePo( pFrames, pObjNew ); + } + else + { + pMiter = Aig_Exor( pFrames, pObjNew, pObjNew2 ); + Aig_ObjCreatePo( pFrames, Aig_NotCond(pMiter, Aig_ObjPhaseReal(pMiter)) ); + } +} + +/**Function************************************************************* + + Synopsis [Prepares the inductive case with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Ssw_FramesWithClasses( Ssw_Man_t * p ) +{ + Aig_Man_t * pFrames; + Aig_Obj_t * pObj, * pObjLi, * pObjLo, * pObjNew; + int i, f, iLits; + assert( p->pFrames == NULL ); + assert( Aig_ManRegNum(p->pAig) > 0 ); + assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) ); + p->nConstrTotal = p->nConstrReduced = 0; + + // start the fraig package + pFrames = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * p->nFrames ); + // create latches for the first frame + Saig_ManForEachLo( p->pAig, pObj, i ) + Ssw_ObjSetFrame( p, pObj, 0, Aig_ObjCreatePi(pFrames) ); + // add timeframes + iLits = 0; + for ( f = 0; f < p->pPars->nFramesK; f++ ) + { + // map constants and PIs + Ssw_ObjSetFrame( p, Aig_ManConst1(p->pAig), f, Aig_ManConst1(pFrames) ); + Saig_ManForEachPi( p->pAig, pObj, i ) + { + pObjNew = Aig_ObjCreatePi(pFrames); + pObjNew->fPhase = (p->vInits != NULL) && Vec_IntEntry(p->vInits, iLits++); + Ssw_ObjSetFrame( p, pObj, f, pObjNew ); + } + // set the constraints on the latch outputs + Saig_ManForEachLo( p->pAig, pObj, i ) + Ssw_FramesConstrainNode( p, pFrames, p->pAig, pObj, f, 1 ); + // add internal nodes of this frame + Aig_ManForEachNode( p->pAig, pObj, i ) + { + pObjNew = Aig_And( pFrames, Ssw_ObjChild0Fra(p, pObj, f), Ssw_ObjChild1Fra(p, pObj, f) ); + Ssw_ObjSetFrame( p, pObj, f, pObjNew ); + Ssw_FramesConstrainNode( p, pFrames, p->pAig, pObj, f, 1 ); + } + // transfer to the primary outputs + Aig_ManForEachPo( p->pAig, pObj, i ) + Ssw_ObjSetFrame( p, pObj, f, Ssw_ObjChild0Fra(p, pObj,f) ); + // transfer latch input to the latch outputs + Saig_ManForEachLiLo( p->pAig, pObjLi, pObjLo, i ) + Ssw_ObjSetFrame( p, pObjLo, f+1, Ssw_ObjFrame(p, pObjLi,f) ); + } + assert( p->vInits == NULL || Vec_IntSize(p->vInits) == iLits + Saig_ManPiNum(p->pAig) ); + // add the POs for the latch outputs of the last frame + Saig_ManForEachLo( p->pAig, pObj, i ) + Aig_ObjCreatePo( pFrames, Ssw_ObjFrame( p, pObj, p->pPars->nFramesK ) ); + + // remove dangling nodes + Aig_ManCleanup( pFrames ); + // make sure the satisfying assignment is node assigned + assert( pFrames->pData == NULL ); +//Aig_ManShow( pFrames, 0, NULL ); + return pFrames; +} + +/**Function************************************************************* + + Synopsis [Prepares the inductive case with speculative reduction.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Aig_Man_t * Ssw_SpeculativeReduction( Ssw_Man_t * p ) +{ + Aig_Man_t * pFrames; + Aig_Obj_t * pObj, * pObjNew; + int i; + assert( p->pFrames == NULL ); + assert( Aig_ManRegNum(p->pAig) > 0 ); + assert( Aig_ManRegNum(p->pAig) < Aig_ManPiNum(p->pAig) ); + p->nConstrTotal = p->nConstrReduced = 0; + + // start the fraig package + pFrames = Aig_ManStart( Aig_ManObjNumMax(p->pAig) * p->nFrames ); + pFrames->pName = Abc_UtilStrsav( p->pAig->pName ); + // map constants and PIs + Ssw_ObjSetFrame( p, Aig_ManConst1(p->pAig), 0, Aig_ManConst1(pFrames) ); + Saig_ManForEachPi( p->pAig, pObj, i ) + Ssw_ObjSetFrame( p, pObj, 0, Aig_ObjCreatePi(pFrames) ); + // create latches for the first frame + Saig_ManForEachLo( p->pAig, pObj, i ) + Ssw_ObjSetFrame( p, pObj, 0, Aig_ObjCreatePi(pFrames) ); + // set the constraints on the latch outputs + Saig_ManForEachLo( p->pAig, pObj, i ) + Ssw_FramesConstrainNode( p, pFrames, p->pAig, pObj, 0, 0 ); + // add internal nodes of this frame + Aig_ManForEachNode( p->pAig, pObj, i ) + { + pObjNew = Aig_And( pFrames, Ssw_ObjChild0Fra(p, pObj, 0), Ssw_ObjChild1Fra(p, pObj, 0) ); + Ssw_ObjSetFrame( p, pObj, 0, pObjNew ); + Ssw_FramesConstrainNode( p, pFrames, p->pAig, pObj, 0, 0 ); + } + // add the POs for the latch outputs of the last frame + Saig_ManForEachLi( p->pAig, pObj, i ) + Aig_ObjCreatePo( pFrames, Ssw_ObjChild0Fra(p, pObj,0) ); + // remove dangling nodes + Aig_ManCleanup( pFrames ); + Aig_ManSetRegNum( pFrames, Aig_ManRegNum(p->pAig) ); +// printf( "SpecRed: Total constraints = %d. Reduced constraints = %d.\n", +// p->nConstrTotal, p->nConstrReduced ); + return pFrames; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + +ABC_NAMESPACE_IMPL_END + |