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Diffstat (limited to 'src/aig/saig/saigSimExt.c')
| -rw-r--r-- | src/aig/saig/saigSimExt.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/src/aig/saig/saigSimExt.c b/src/aig/saig/saigSimExt.c new file mode 100644 index 00000000..49c85ff4 --- /dev/null +++ b/src/aig/saig/saigSimExt.c @@ -0,0 +1,325 @@ +/**CFile**************************************************************** + + FileName [saigSimExt.c] + + SystemName [ABC: Logic synthesis and verification system.] + + PackageName [Sequential AIG package.] + + Synopsis [Extending simulation trace to contain ternary values.] + + Author [Alan Mishchenko] + + Affiliation [UC Berkeley] + + Date [Ver. 1.0. Started - June 20, 2005.] + + Revision [$Id: saigSimExt.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $] + +***********************************************************************/ + +#include "saig.h" +#include "ssw.h" + +//////////////////////////////////////////////////////////////////////// +/// DECLARATIONS /// +//////////////////////////////////////////////////////////////////////// + +#define SAIG_ZER 1 +#define SAIG_ONE 2 +#define SAIG_UND 3 + +static inline int Saig_ManSimInfoNot( int Value ) +{ + if ( Value == SAIG_ZER ) + return SAIG_ONE; + if ( Value == SAIG_ONE ) + return SAIG_ZER; + return SAIG_UND; +} + +static inline int Saig_ManSimInfoAnd( int Value0, int Value1 ) +{ + if ( Value0 == SAIG_ZER || Value1 == SAIG_ZER ) + return SAIG_ZER; + if ( Value0 == SAIG_ONE && Value1 == SAIG_ONE ) + return SAIG_ONE; + return SAIG_UND; +} + +static inline int Saig_ManSimInfoGet( Vec_Ptr_t * vSimInfo, Aig_Obj_t * pObj, int iFrame ) +{ + unsigned * pInfo = Vec_PtrEntry( vSimInfo, Aig_ObjId(pObj) ); + return 3 & (pInfo[iFrame >> 4] >> ((iFrame & 15) << 1)); +} + +static inline void Saig_ManSimInfoSet( Vec_Ptr_t * vSimInfo, Aig_Obj_t * pObj, int iFrame, int Value ) +{ + unsigned * pInfo = Vec_PtrEntry( vSimInfo, Aig_ObjId(pObj) ); + assert( Value >= SAIG_ZER && Value <= SAIG_UND ); + Value ^= Saig_ManSimInfoGet( vSimInfo, pObj, iFrame ); + pInfo[iFrame >> 4] ^= (Value << ((iFrame & 15) << 1)); +} + +//////////////////////////////////////////////////////////////////////// +/// FUNCTION DEFINITIONS /// +//////////////////////////////////////////////////////////////////////// + +/**Function************************************************************* + + Synopsis [Performs ternary simulation for one node.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Saig_ManExtendOneEval( Vec_Ptr_t * vSimInfo, Aig_Obj_t * pObj, int iFrame ) +{ + int Value0, Value1, Value; + Value0 = Saig_ManSimInfoGet( vSimInfo, Aig_ObjFanin0(pObj), iFrame ); + if ( Aig_ObjFaninC0(pObj) ) + Value0 = Saig_ManSimInfoNot( Value0 ); + if ( Aig_ObjIsPo(pObj) ) + { + Saig_ManSimInfoSet( vSimInfo, pObj, iFrame, Value0 ); + return Value0; + } + assert( Aig_ObjIsNode(pObj) ); + Value1 = Saig_ManSimInfoGet( vSimInfo, Aig_ObjFanin1(pObj), iFrame ); + if ( Aig_ObjFaninC1(pObj) ) + Value1 = Saig_ManSimInfoNot( Value1 ); + Value = Saig_ManSimInfoAnd( Value0, Value1 ); + Saig_ManSimInfoSet( vSimInfo, pObj, iFrame, Value ); + return Value; +} + +/**Function************************************************************* + + Synopsis [Performs ternary simulation for one design.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Saig_ManSimDataInit( Aig_Man_t * p, Ssw_Cex_t * pCex, Vec_Ptr_t * vSimInfo, Vec_Int_t * vRes ) +{ + Aig_Obj_t * pObj, * pObjLi, * pObjLo; + int i, f, Entry, iBit = 0; + Saig_ManForEachLo( p, pObj, i ) + Saig_ManSimInfoSet( vSimInfo, pObj, 0, Aig_InfoHasBit(pCex->pData, iBit++)?SAIG_ONE:SAIG_ZER ); + for ( f = 0; f <= pCex->iFrame; f++ ) + { + Saig_ManSimInfoSet( vSimInfo, Aig_ManConst1(p), f, SAIG_ONE ); + Saig_ManForEachPi( p, pObj, i ) + Saig_ManSimInfoSet( vSimInfo, pObj, f, Aig_InfoHasBit(pCex->pData, iBit++)?SAIG_ONE:SAIG_ZER ); + if ( vRes ) + Vec_IntForEachEntry( vRes, Entry, i ) + Saig_ManSimInfoSet( vSimInfo, Aig_ManPi(p, Entry), f, SAIG_UND ); + Aig_ManForEachNode( p, pObj, i ) + Saig_ManExtendOneEval( vSimInfo, pObj, f ); + Aig_ManForEachPo( p, pObj, i ) + Saig_ManExtendOneEval( vSimInfo, pObj, f ); + if ( f == pCex->iFrame ) + break; + Saig_ManForEachLiLo( p, pObjLi, pObjLo, i ) + Saig_ManSimInfoSet( vSimInfo, pObjLo, f+1, Saig_ManSimInfoGet(vSimInfo, pObjLi, f) ); + } + // make sure the output of the property failed + pObj = Aig_ManPo( p, pCex->iPo ); + return Saig_ManSimInfoGet( vSimInfo, pObj, pCex->iFrame ); +} + +/**Function************************************************************* + + Synopsis [Tries to assign ternary value to one of the primary inputs.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +int Saig_ManExtendOne( Aig_Man_t * p, Ssw_Cex_t * pCex, Vec_Ptr_t * vSimInfo, + int iPi, int iFrame, Vec_Int_t * vUndo, Vec_Int_t * vVis, Vec_Int_t * vVis2 ) +{ + Aig_Obj_t * pFanout, * pObj = Aig_ManPi(p, iPi); + int i, k, f, iFanout, Value, Value2, Entry; + // save original value + Value = Saig_ManSimInfoGet( vSimInfo, pObj, iFrame ); + assert( Value == SAIG_ZER || Value == SAIG_ONE ); + Vec_IntPush( vUndo, Aig_ObjId(pObj) ); + Vec_IntPush( vUndo, iFrame ); + Vec_IntPush( vUndo, Value ); + // update original value + Saig_ManSimInfoSet( vSimInfo, pObj, iFrame, SAIG_UND ); + // traverse + Vec_IntClear( vVis ); + Vec_IntPush( vVis, Aig_ObjId(pObj) ); + for ( f = iFrame; f <= pCex->iFrame; f++ ) + { + Vec_IntClear( vVis2 ); + Vec_IntForEachEntry( vVis, Entry, i ) + { + pObj = Aig_ManObj( p, Entry ); + Aig_ObjForEachFanout( p, pObj, pFanout, iFanout, k ) + { + assert( Aig_ObjId(pObj) < Aig_ObjId(pFanout) ); + Value = Saig_ManSimInfoGet( vSimInfo, pFanout, f ); + if ( Value == SAIG_UND ) + continue; + Value2 = Saig_ManExtendOneEval( vSimInfo, pFanout, f ); + if ( Value2 == Value ) + continue; + assert( Value2 == SAIG_UND ); +// assert( Vec_IntFind(vVis, Aig_ObjId(pFanout)) == -1 ); + if ( Aig_ObjIsNode(pFanout) ) + Vec_IntPushOrder( vVis, Aig_ObjId(pFanout) ); + else if ( Saig_ObjIsLi(p, pFanout) ) + Vec_IntPush( vVis2, Aig_ObjId(pFanout) ); + Vec_IntPush( vUndo, Aig_ObjId(pFanout) ); + Vec_IntPush( vUndo, f ); + Vec_IntPush( vUndo, Value ); + } + } + if ( Vec_IntSize(vVis2) == 0 ) + break; + if ( f == pCex->iFrame ) + break; + // transfer + Vec_IntClear( vVis ); + Vec_IntForEachEntry( vVis2, Entry, i ) + { + pObj = Aig_ManObj( p, Entry ); + assert( Saig_ObjIsLi(p, pObj) ); + pFanout = Saig_ObjLiToLo( p, pObj ); + Vec_IntPushOrder( vVis, Aig_ObjId(pFanout) ); + Value = Saig_ManSimInfoGet( vSimInfo, pObj, f ); + Saig_ManSimInfoSet( vSimInfo, pFanout, f+1, Value ); + } + } + // check the output + pObj = Aig_ManPo( p, pCex->iPo ); + Value = Saig_ManSimInfoGet( vSimInfo, pObj, pCex->iFrame ); + assert( Value == SAIG_ONE || Value == SAIG_UND ); + return (int)(Value == SAIG_ONE); +} + +/**Function************************************************************* + + Synopsis [] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +void Saig_ManExtendUndo( Aig_Man_t * p, Vec_Ptr_t * vSimInfo, Vec_Int_t * vUndo ) +{ + Aig_Obj_t * pObj; + int i, iFrame, Value; + for ( i = 0; i < Vec_IntSize(vUndo); i += 3 ) + { + pObj = Aig_ManObj( p, Vec_IntEntry(vUndo, i) ); + iFrame = Vec_IntEntry(vUndo, i+1); + Value = Vec_IntEntry(vUndo, i+2); + assert( Saig_ManSimInfoGet(vSimInfo, pObj, iFrame) == SAIG_UND ); + Saig_ManSimInfoSet( vSimInfo, pObj, iFrame, Value ); + } +} + +/**Function************************************************************* + + Synopsis [Returns the array of PIs for flops that should not be absracted.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Saig_ManExtendCounterExample( Aig_Man_t * p, int iFirstPi, Ssw_Cex_t * pCex, Vec_Ptr_t * vSimInfo, int fVerbose ) +{ + Vec_Int_t * vRes, * vResInv, * vUndo, * vVis, * vVis2; + int i, f, Value; + assert( Aig_ManRegNum(p) > 0 ); + assert( (unsigned *)Vec_PtrEntry(vSimInfo,1) - (unsigned *)Vec_PtrEntry(vSimInfo,0) >= Aig_BitWordNum(2*(pCex->iFrame+1)) ); + // start simulation data + Value = Saig_ManSimDataInit( p, pCex, vSimInfo, NULL ); + assert( Value == SAIG_ONE ); + // select the result + vRes = Vec_IntAlloc( 1000 ); + vResInv = Vec_IntAlloc( 1000 ); + vVis = Vec_IntAlloc( 1000 ); + vVis2 = Vec_IntAlloc( 1000 ); + vUndo = Vec_IntAlloc( 1000 ); + for ( i = iFirstPi; i < Saig_ManPiNum(p); i++ ) + { + Vec_IntClear( vUndo ); + for ( f = pCex->iFrame; f >= 0; f-- ) + if ( !Saig_ManExtendOne( p, pCex, vSimInfo, i, f, vUndo, vVis, vVis2 ) ) + { + Saig_ManExtendUndo( p, vSimInfo, vUndo ); + break; + } + if ( f >= 0 ) + Vec_IntPush( vRes, i ); + else + Vec_IntPush( vResInv, i ); + } + Vec_IntFree( vVis ); + Vec_IntFree( vVis2 ); + Vec_IntFree( vUndo ); + // resimulate to make sure it is valid + Value = Saig_ManSimDataInit( p, pCex, vSimInfo, vResInv ); + assert( Value == SAIG_ONE ); + Vec_IntFree( vResInv ); + return vRes; +} + +/**Function************************************************************* + + Synopsis [Returns the array of PIs for flops that should not be absracted.] + + Description [] + + SideEffects [] + + SeeAlso [] + +***********************************************************************/ +Vec_Int_t * Saig_ManExtendCounterExampleTest( Aig_Man_t * p, int iFirstPi, Ssw_Cex_t * pCex, int fVerbose ) +{ + Vec_Int_t * vRes; + Vec_Ptr_t * vSimInfo; + int clk; + Aig_ManFanoutStart( p ); + vSimInfo = Vec_PtrAllocSimInfo( Aig_ManObjNumMax(p), Aig_BitWordNum(2*(pCex->iFrame+1)) ); +clk = clock(); + vRes = Saig_ManExtendCounterExample( p, iFirstPi, pCex, vSimInfo, fVerbose ); + if ( fVerbose ) + { + printf( "Total new PIs = %3d. Non-removable PIs = %3d. ", Saig_ManPiNum(p)-iFirstPi, Vec_IntSize(vRes) ); +PRT( "Time", clock() - clk ); + } + Vec_PtrFree( vSimInfo ); + Aig_ManFanoutStop( p ); + return vRes; +// Vec_IntFree( vRes ); +// return NULL; +} + +//////////////////////////////////////////////////////////////////////// +/// END OF FILE /// +//////////////////////////////////////////////////////////////////////// + + |