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/**CFile****************************************************************
FileName [gia.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Scalable AIG package.]
Synopsis []
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: gia.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "gia.h"
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static inline int Sat_ObjXValue( Gia_Obj_t * pObj ) { return (pObj->fMark1 << 1) | pObj->fMark0; }
static inline void Sat_ObjSetXValue( Gia_Obj_t * pObj, int v) { pObj->fMark0 = (v & 1); pObj->fMark1 = ((v >> 1) & 1); }
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Collects nodes in the cone and initialized them to x.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_SatCollectCone_rec( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vVisit )
{
if ( Sat_ObjXValue(pObj) == GIA_UND )
return;
if ( Gia_ObjIsAnd(pObj) )
{
Gia_SatCollectCone_rec( p, Gia_ObjFanin0(pObj), vVisit );
Gia_SatCollectCone_rec( p, Gia_ObjFanin1(pObj), vVisit );
}
assert( Sat_ObjXValue(pObj) == 0 );
Sat_ObjSetXValue( pObj, GIA_UND );
Vec_IntPush( vVisit, Gia_ObjId(p, pObj) );
}
/**Function*************************************************************
Synopsis [Collects nodes in the cone and initialized them to x.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_SatCollectCone( Gia_Man_t * p, Gia_Obj_t * pObj, Vec_Int_t * vVisit )
{
assert( !Gia_IsComplement(pObj) );
assert( !Gia_ObjIsConst0(pObj) );
assert( Sat_ObjXValue(pObj) == 0 );
Vec_IntClear( vVisit );
Gia_SatCollectCone_rec( p, pObj, vVisit );
}
/**Function*************************************************************
Synopsis [Checks if the counter-examples asserts the output.]
Description [Assumes that fMark0 and fMark1 are clean. Leaves them clean.]
SideEffects []
SeeAlso []
***********************************************************************/
void Gia_SatVerifyPattern( Gia_Man_t * p, Gia_Obj_t * pRoot, Vec_Int_t * vCex, Vec_Int_t * vVisit )
{
Gia_Obj_t * pObj;
int i, Entry, Value, Value0, Value1;
assert( Gia_ObjIsCo(pRoot) );
assert( !Gia_ObjIsConst0(Gia_ObjFanin0(pRoot)) );
// collect nodes and initialized them to x
Gia_SatCollectCone( p, Gia_ObjFanin0(pRoot), vVisit );
// set binary values to nodes in the counter-example
Vec_IntForEachEntry( vCex, Entry, i )
// Sat_ObjSetXValue( Gia_ManObj(p, Gia_Lit2Var(Entry)), Gia_LitIsCompl(Entry)? GIA_ZER : GIA_ONE );
Sat_ObjSetXValue( Gia_ManCi(p, Gia_Lit2Var(Entry)), Gia_LitIsCompl(Entry)? GIA_ZER : GIA_ONE );
// simulate
Gia_ManForEachObjVec( vVisit, p, pObj, i )
{
if ( Gia_ObjIsCi(pObj) )
continue;
assert( Gia_ObjIsAnd(pObj) );
Value0 = Sat_ObjXValue( Gia_ObjFanin0(pObj) );
Value1 = Sat_ObjXValue( Gia_ObjFanin1(pObj) );
Value = Gia_XsimAndCond( Value0, Gia_ObjFaninC0(pObj), Value1, Gia_ObjFaninC1(pObj) );
Sat_ObjSetXValue( pObj, Value );
}
Value = Gia_XsimNotCond( Value, Gia_ObjFaninC0(pRoot) );
if ( Value != GIA_ONE )
printf( "Gia_SatVerifyPattern(): Verification FAILED.\n" );
// else
// printf( "Gia_SatVerifyPattern(): Verification succeeded.\n" );
// assert( Value == GIA_ONE );
// clean the nodes
Gia_ManForEachObjVec( vVisit, p, pObj, i )
Sat_ObjSetXValue( pObj, 0 );
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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