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abc/src/base/abci/abcMiter.c

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/**CFile****************************************************************
FileName [abcMiter.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Network and node package.]
Synopsis [Procedures to derive the miter of two circuits.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: abcMiter.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include "abc.h"
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
static Abc_Ntk_t * Abc_NtkMiterInt( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fComb );
static void Abc_NtkMiterPrepare( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Abc_Ntk_t * pNtkMiter, int fComb );
static void Abc_NtkMiterAddOne( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkMiter );
static void Abc_NtkMiterFinalize( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Abc_Ntk_t * pNtkMiter, int fComb );
static void Abc_NtkAddFrame( Abc_Ntk_t * pNetNew, Abc_Ntk_t * pNet, int iFrame );
// to be exported
typedef void (*AddFrameMapping)( Abc_Obj_t*, Abc_Obj_t*, int, void*);
extern Abc_Ntk_t * Abc_NtkFrames2( Abc_Ntk_t * pNtk, int nFrames, int fInitial, AddFrameMapping addFrameMapping, void* arg );
static void Abc_NtkAddFrame2( Abc_Ntk_t * pNtkFrames, Abc_Ntk_t * pNtk, int iFrame, Vec_Ptr_t * vNodes, AddFrameMapping addFrameMapping, void* arg );
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [Derives the miter of two networks.]
Description [Preprocesses the networks to make sure that they are strashed.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiter( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fComb )
{
Abc_Ntk_t * pTemp = NULL;
int fRemove1, fRemove2;
assert( Abc_NtkHasOnlyLatchBoxes(pNtk1) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk2) );
// check that the networks have the same PIs/POs/latches
if ( !Abc_NtkCompareSignals( pNtk1, pNtk2, 0, fComb ) )
return NULL;
// make sure the circuits are strashed
fRemove1 = (!Abc_NtkIsStrash(pNtk1)) && (pNtk1 = Abc_NtkStrash(pNtk1, 0, 0));
fRemove2 = (!Abc_NtkIsStrash(pNtk2)) && (pNtk2 = Abc_NtkStrash(pNtk2, 0, 0));
if ( pNtk1 && pNtk2 )
pTemp = Abc_NtkMiterInt( pNtk1, pNtk2, fComb );
if ( fRemove1 ) Abc_NtkDelete( pNtk1 );
if ( fRemove2 ) Abc_NtkDelete( pNtk2 );
return pTemp;
}
/**Function*************************************************************
Synopsis [Derives the miter of two sequential networks.]
Description [Assumes that the networks are strashed.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterInt( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, int fComb )
{
char Buffer[1000];
Abc_Ntk_t * pNtkMiter;
assert( Abc_NtkIsStrash(pNtk1) );
assert( Abc_NtkIsStrash(pNtk2) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_%s_miter", pNtk1->pName, pNtk2->pName );
pNtkMiter->pName = Extra_UtilStrsav(Buffer);
// perform strashing
Abc_NtkMiterPrepare( pNtk1, pNtk2, pNtkMiter, fComb );
Abc_NtkMiterAddOne( pNtk1, pNtkMiter );
Abc_NtkMiterAddOne( pNtk2, pNtkMiter );
Abc_NtkMiterFinalize( pNtk1, pNtk2, pNtkMiter, fComb );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiter: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Prepares the network for mitering.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiterPrepare( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Abc_Ntk_t * pNtkMiter, int fComb )
{
Abc_Obj_t * pObj, * pObjNew;
int i;
// clean the copy field in all objects
// Abc_NtkCleanCopy( pNtk1 );
// Abc_NtkCleanCopy( pNtk2 );
Abc_AigConst1(pNtk1)->pCopy = Abc_AigConst1(pNtkMiter);
Abc_AigConst1(pNtk2)->pCopy = Abc_AigConst1(pNtkMiter);
if ( fComb )
{
// create new PIs and remember them in the old PIs
Abc_NtkForEachCi( pNtk1, pObj, i )
{
pObjNew = Abc_NtkCreatePi( pNtkMiter );
// remember this PI in the old PIs
pObj->pCopy = pObjNew;
pObj = Abc_NtkCi(pNtk2, i);
pObj->pCopy = pObjNew;
// add name
Abc_ObjAssignName( pObjNew, Abc_ObjName(pObj), NULL );
}
// create the only PO
pObjNew = Abc_NtkCreatePo( pNtkMiter );
// add the PO name
Abc_ObjAssignName( pObjNew, "miter", NULL );
}
else
{
// create new PIs and remember them in the old PIs
Abc_NtkForEachPi( pNtk1, pObj, i )
{
pObjNew = Abc_NtkCreatePi( pNtkMiter );
// remember this PI in the old PIs
pObj->pCopy = pObjNew;
pObj = Abc_NtkPi(pNtk2, i);
pObj->pCopy = pObjNew;
// add name
Abc_ObjAssignName( pObjNew, Abc_ObjName(pObj), NULL );
}
// create the only PO
pObjNew = Abc_NtkCreatePo( pNtkMiter );
// add the PO name
Abc_ObjAssignName( pObjNew, "miter", NULL );
// create the latches
Abc_NtkForEachLatch( pNtk1, pObj, i )
{
pObjNew = Abc_NtkDupBox( pNtkMiter, pObj, 0 );
// add names
Abc_ObjAssignName( pObjNew, Abc_ObjName(pObj), "_1" );
Abc_ObjAssignName( Abc_ObjFanin0(pObjNew), Abc_ObjName(Abc_ObjFanin0(pObj)), "_1" );
Abc_ObjAssignName( Abc_ObjFanout0(pObjNew), Abc_ObjName(Abc_ObjFanout0(pObj)), "_1" );
}
Abc_NtkForEachLatch( pNtk2, pObj, i )
{
pObjNew = Abc_NtkDupBox( pNtkMiter, pObj, 0 );
// add name
Abc_ObjAssignName( pObjNew, Abc_ObjName(pObj), "_2" );
Abc_ObjAssignName( Abc_ObjFanin0(pObjNew), Abc_ObjName(Abc_ObjFanin0(pObj)), "_2" );
Abc_ObjAssignName( Abc_ObjFanout0(pObjNew), Abc_ObjName(Abc_ObjFanout0(pObj)), "_2" );
}
}
}
/**Function*************************************************************
Synopsis [Performs mitering for one network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiterAddOne( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkMiter )
{
Abc_Obj_t * pNode;
int i;
assert( Abc_NtkIsDfsOrdered(pNtk) );
Abc_AigForEachAnd( pNtk, pNode, i )
pNode->pCopy = Abc_AigAnd( pNtkMiter->pManFunc, Abc_ObjChild0Copy(pNode), Abc_ObjChild1Copy(pNode) );
}
/**Function*************************************************************
Synopsis [Performs mitering for one network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiterAddCone( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkMiter, Abc_Obj_t * pRoot )
{
Vec_Ptr_t * vNodes;
Abc_Obj_t * pNode;
int i;
// map the constant nodes
Abc_AigConst1(pNtk)->pCopy = Abc_AigConst1(pNtkMiter);
// perform strashing
vNodes = Abc_NtkDfsNodes( pNtk, &pRoot, 1 );
Vec_PtrForEachEntry( vNodes, pNode, i )
if ( Abc_AigNodeIsAnd(pNode) )
pNode->pCopy = Abc_AigAnd( pNtkMiter->pManFunc, Abc_ObjChild0Copy(pNode), Abc_ObjChild1Copy(pNode) );
Vec_PtrFree( vNodes );
}
/**Function*************************************************************
Synopsis [Finalizes the miter by adding the output part.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiterFinalize( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2, Abc_Ntk_t * pNtkMiter, int fComb )
{
Vec_Ptr_t * vPairs;
Abc_Obj_t * pMiter, * pNode;
int i;
// collect the PO pairs from both networks
vPairs = Vec_PtrAlloc( 100 );
if ( fComb )
{
// collect the CO nodes for the miter
Abc_NtkForEachCo( pNtk1, pNode, i )
{
Vec_PtrPush( vPairs, Abc_ObjChild0Copy(pNode) );
pNode = Abc_NtkCo( pNtk2, i );
Vec_PtrPush( vPairs, Abc_ObjChild0Copy(pNode) );
}
}
else
{
// collect the PO nodes for the miter
Abc_NtkForEachPo( pNtk1, pNode, i )
{
Vec_PtrPush( vPairs, Abc_ObjChild0Copy(pNode) );
pNode = Abc_NtkPo( pNtk2, i );
Vec_PtrPush( vPairs, Abc_ObjChild0Copy(pNode) );
}
// connect new latches
Abc_NtkForEachLatch( pNtk1, pNode, i )
Abc_ObjAddFanin( Abc_ObjFanin0(pNode)->pCopy, Abc_ObjChild0Copy(Abc_ObjFanin0(pNode)) );
Abc_NtkForEachLatch( pNtk2, pNode, i )
Abc_ObjAddFanin( Abc_ObjFanin0(pNode)->pCopy, Abc_ObjChild0Copy(Abc_ObjFanin0(pNode)) );
}
// add the miter
pMiter = Abc_AigMiter( pNtkMiter->pManFunc, vPairs );
Abc_ObjAddFanin( Abc_NtkPo(pNtkMiter,0), pMiter );
Vec_PtrFree( vPairs );
}
/**Function*************************************************************
Synopsis [Derives the AND of two miters.]
Description [The network should have the same names of PIs.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterAnd( Abc_Ntk_t * pNtk1, Abc_Ntk_t * pNtk2 )
{
char Buffer[1000];
Abc_Ntk_t * pNtkMiter;
Abc_Obj_t * pOutput1, * pOutput2;
Abc_Obj_t * pRoot1, * pRoot2, * pMiter;
assert( Abc_NtkIsStrash(pNtk1) );
assert( Abc_NtkIsStrash(pNtk2) );
assert( 1 == Abc_NtkCoNum(pNtk1) );
assert( 1 == Abc_NtkCoNum(pNtk2) );
assert( 0 == Abc_NtkLatchNum(pNtk1) );
assert( 0 == Abc_NtkLatchNum(pNtk2) );
assert( Abc_NtkCiNum(pNtk1) == Abc_NtkCiNum(pNtk2) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk1) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk2) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_%s_miter", pNtk1->pName, pNtk2->pName );
pNtkMiter->pName = Extra_UtilStrsav(Buffer);
// perform strashing
Abc_NtkMiterPrepare( pNtk1, pNtk2, pNtkMiter, 1 );
Abc_NtkMiterAddOne( pNtk1, pNtkMiter );
Abc_NtkMiterAddOne( pNtk2, pNtkMiter );
// Abc_NtkMiterFinalize( pNtk1, pNtk2, pNtkMiter, 1 );
pRoot1 = Abc_NtkPo(pNtk1,0);
pRoot2 = Abc_NtkPo(pNtk2,0);
pOutput1 = Abc_ObjNotCond( Abc_ObjFanin0(pRoot1)->pCopy, Abc_ObjFaninC0(pRoot1) );
pOutput2 = Abc_ObjNotCond( Abc_ObjFanin0(pRoot2)->pCopy, Abc_ObjFaninC0(pRoot2) );
// create the miter of the two outputs
pMiter = Abc_AigAnd( pNtkMiter->pManFunc, pOutput1, pOutput2 );
Abc_ObjAddFanin( Abc_NtkPo(pNtkMiter,0), pMiter );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiterAnd: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Derives the cofactor of the miter w.r.t. the set of vars.]
Description [The array of variable values contains -1/0/1 for each PI.
-1 means this PI remains, 0/1 means this PI is set to 0/1.]
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterCofactor( Abc_Ntk_t * pNtk, Vec_Int_t * vPiValues )
{
char Buffer[1000];
Abc_Ntk_t * pNtkMiter;
Abc_Obj_t * pRoot, * pOutput1;
int Value, i;
assert( Abc_NtkIsStrash(pNtk) );
assert( 1 == Abc_NtkCoNum(pNtk) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_miter", pNtk->pName );
pNtkMiter->pName = Extra_UtilStrsav(Buffer);
// get the root output
pRoot = Abc_NtkCo( pNtk, 0 );
// perform strashing
Abc_NtkMiterPrepare( pNtk, pNtk, pNtkMiter, 1 );
// set the first cofactor
Vec_IntForEachEntry( vPiValues, Value, i )
{
if ( Value == -1 )
continue;
if ( Value == 0 )
{
Abc_NtkCi(pNtk, i)->pCopy = Abc_ObjNot( Abc_AigConst1(pNtkMiter) );
continue;
}
if ( Value == 1 )
{
Abc_NtkCi(pNtk, i)->pCopy = Abc_AigConst1(pNtkMiter);
continue;
}
assert( 0 );
}
// add the first cofactor
Abc_NtkMiterAddCone( pNtk, pNtkMiter, pRoot );
// save the output
pOutput1 = Abc_ObjNotCond( Abc_ObjFanin0(pRoot)->pCopy, Abc_ObjFaninC0(pRoot) );
// create the miter of the two outputs
Abc_ObjAddFanin( Abc_NtkPo(pNtkMiter,0), pOutput1 );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiterCofactor: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Derives the miter of two cofactors of one output.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterForCofactors( Abc_Ntk_t * pNtk, int Out, int In1, int In2 )
{
char Buffer[1000];
Abc_Ntk_t * pNtkMiter;
Abc_Obj_t * pRoot, * pOutput1, * pOutput2, * pMiter;
assert( Abc_NtkIsStrash(pNtk) );
assert( Out < Abc_NtkCoNum(pNtk) );
assert( In1 < Abc_NtkCiNum(pNtk) );
assert( In2 < Abc_NtkCiNum(pNtk) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_miter", Abc_ObjName(Abc_NtkCo(pNtk, Out)) );
pNtkMiter->pName = Extra_UtilStrsav(Buffer);
// get the root output
pRoot = Abc_NtkCo( pNtk, Out );
// perform strashing
Abc_NtkMiterPrepare( pNtk, pNtk, pNtkMiter, 1 );
// set the first cofactor
Abc_NtkCi(pNtk, In1)->pCopy = Abc_ObjNot( Abc_AigConst1(pNtkMiter) );
if ( In2 >= 0 )
Abc_NtkCi(pNtk, In2)->pCopy = Abc_AigConst1(pNtkMiter);
// add the first cofactor
Abc_NtkMiterAddCone( pNtk, pNtkMiter, pRoot );
// save the output
pOutput1 = Abc_ObjFanin0(pRoot)->pCopy;
// set the second cofactor
Abc_NtkCi(pNtk, In1)->pCopy = Abc_AigConst1(pNtkMiter);
if ( In2 >= 0 )
Abc_NtkCi(pNtk, In2)->pCopy = Abc_ObjNot( Abc_AigConst1(pNtkMiter) );
// add the second cofactor
Abc_NtkMiterAddCone( pNtk, pNtkMiter, pRoot );
// save the output
pOutput2 = Abc_ObjFanin0(pRoot)->pCopy;
// create the miter of the two outputs
pMiter = Abc_AigXor( pNtkMiter->pManFunc, pOutput1, pOutput2 );
Abc_ObjAddFanin( Abc_NtkPo(pNtkMiter,0), pMiter );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiter: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Derives the miter of two cofactors of one output.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterQuantify( Abc_Ntk_t * pNtk, int In, int fExist )
{
Abc_Ntk_t * pNtkMiter;
Abc_Obj_t * pRoot, * pOutput1, * pOutput2, * pMiter;
assert( Abc_NtkIsStrash(pNtk) );
assert( 1 == Abc_NtkCoNum(pNtk) );
assert( In < Abc_NtkCiNum(pNtk) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk) );
// start the new network
pNtkMiter = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
pNtkMiter->pName = Extra_UtilStrsav( Abc_ObjName(Abc_NtkCo(pNtk, 0)) );
// get the root output
pRoot = Abc_NtkCo( pNtk, 0 );
// perform strashing
Abc_NtkMiterPrepare( pNtk, pNtk, pNtkMiter, 1 );
// set the first cofactor
Abc_NtkCi(pNtk, In)->pCopy = Abc_ObjNot( Abc_AigConst1(pNtkMiter) );
// add the first cofactor
Abc_NtkMiterAddCone( pNtk, pNtkMiter, pRoot );
// save the output
// pOutput1 = Abc_ObjFanin0(pRoot)->pCopy;
pOutput1 = Abc_ObjNotCond( Abc_ObjFanin0(pRoot)->pCopy, Abc_ObjFaninC0(pRoot) );
// set the second cofactor
Abc_NtkCi(pNtk, In)->pCopy = Abc_AigConst1(pNtkMiter);
// add the second cofactor
Abc_NtkMiterAddCone( pNtk, pNtkMiter, pRoot );
// save the output
// pOutput2 = Abc_ObjFanin0(pRoot)->pCopy;
pOutput2 = Abc_ObjNotCond( Abc_ObjFanin0(pRoot)->pCopy, Abc_ObjFaninC0(pRoot) );
// create the miter of the two outputs
if ( fExist )
pMiter = Abc_AigOr( pNtkMiter->pManFunc, pOutput1, pOutput2 );
else
pMiter = Abc_AigAnd( pNtkMiter->pManFunc, pOutput1, pOutput2 );
Abc_ObjAddFanin( Abc_NtkPo(pNtkMiter,0), pMiter );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkMiter ) )
{
printf( "Abc_NtkMiter: The network check has failed.\n" );
Abc_NtkDelete( pNtkMiter );
return NULL;
}
return pNtkMiter;
}
/**Function*************************************************************
Synopsis [Quantifies all the PIs existentially from the only PO of the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkMiterQuantifyPis( Abc_Ntk_t * pNtk )
{
Abc_Ntk_t * pNtkTemp;
Abc_Obj_t * pObj;
int i;
assert( Abc_NtkHasOnlyLatchBoxes(pNtk) );
Abc_NtkForEachPi( pNtk, pObj, i )
{
if ( Abc_ObjFanoutNum(pObj) == 0 )
continue;
pNtk = Abc_NtkMiterQuantify( pNtkTemp = pNtk, i, 1 );
Abc_NtkDelete( pNtkTemp );
}
return pNtk;
}
/**Function*************************************************************
Synopsis [Checks the status of the miter.]
Description [Return 0 if the miter is sat for at least one output.
Return 1 if the miter is unsat for all its outputs. Returns -1 if the
miter is undecided for some outputs.]
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkMiterIsConstant( Abc_Ntk_t * pMiter )
{
Abc_Obj_t * pNodePo, * pChild;
int i;
assert( Abc_NtkIsStrash(pMiter) );
Abc_NtkForEachPo( pMiter, pNodePo, i )
{
pChild = Abc_ObjChild0( pNodePo );
if ( Abc_AigNodeIsConst(pChild) )
{
assert( Abc_ObjRegular(pChild) == Abc_AigConst1(pMiter) );
if ( !Abc_ObjIsComplement(pChild) )
{
// if the miter is constant 1, return immediately
// printf( "MITER IS CONSTANT 1!\n" );
return 0;
}
}
// if the miter is undecided (or satisfiable), return immediately
else
return -1;
}
// return 1, meaning all outputs are constant zero
return 1;
}
/**Function*************************************************************
Synopsis [Reports the status of the miter.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkMiterReport( Abc_Ntk_t * pMiter )
{
Abc_Obj_t * pChild, * pNode;
int i;
if ( Abc_NtkPoNum(pMiter) == 1 )
{
pChild = Abc_ObjChild0( Abc_NtkPo(pMiter,0) );
if ( Abc_AigNodeIsConst(pChild) )
{
if ( Abc_ObjIsComplement(pChild) )
printf( "Unsatisfiable.\n" );
else
printf( "Satisfiable. (Constant 1).\n" );
}
else
printf( "Satisfiable.\n" );
}
else
{
Abc_NtkForEachPo( pMiter, pNode, i )
{
pChild = Abc_ObjChild0( Abc_NtkPo(pMiter,i) );
printf( "Output #%2d : ", i );
if ( Abc_AigNodeIsConst(pChild) )
{
if ( Abc_ObjIsComplement(pChild) )
printf( "Unsatisfiable.\n" );
else
printf( "Satisfiable. (Constant 1).\n" );
}
else
printf( "Satisfiable.\n" );
}
}
}
/**Function*************************************************************
Synopsis [Derives the timeframes of the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkFrames( Abc_Ntk_t * pNtk, int nFrames, int fInitial )
{
char Buffer[1000];
ProgressBar * pProgress;
Abc_Ntk_t * pNtkFrames;
Abc_Obj_t * pLatch, * pLatchOut;
int i, Counter;
assert( nFrames > 0 );
assert( Abc_NtkIsStrash(pNtk) );
assert( Abc_NtkIsDfsOrdered(pNtk) );
assert( Abc_NtkHasOnlyLatchBoxes(pNtk) );
// start the new network
pNtkFrames = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_%d_frames", pNtk->pName, nFrames );
pNtkFrames->pName = Extra_UtilStrsav(Buffer);
// map the constant nodes
Abc_AigConst1(pNtk)->pCopy = Abc_AigConst1(pNtkFrames);
// create new latches (or their initial values) and remember them in the new latches
if ( !fInitial )
{
Abc_NtkForEachLatch( pNtk, pLatch, i )
Abc_NtkDupBox( pNtkFrames, pLatch, 1 );
}
else
{
Counter = 0;
Abc_NtkForEachLatch( pNtk, pLatch, i )
{
pLatchOut = Abc_ObjFanout0(pLatch);
if ( Abc_LatchIsInitNone(pLatch) || Abc_LatchIsInitDc(pLatch) ) // don't-care initial value - create a new PI
{
pLatchOut->pCopy = Abc_NtkCreatePi(pNtkFrames);
Abc_ObjAssignName( pLatchOut->pCopy, Abc_ObjName(pLatchOut), NULL );
Counter++;
}
else
pLatchOut->pCopy = Abc_ObjNotCond( Abc_AigConst1(pNtkFrames), Abc_LatchIsInit0(pLatch) );
}
if ( Counter )
printf( "Warning: %d uninitialized latches are replaced by free PI variables.\n", Counter );
}
// create the timeframes
pProgress = Extra_ProgressBarStart( stdout, nFrames );
for ( i = 0; i < nFrames; i++ )
{
Extra_ProgressBarUpdate( pProgress, i, NULL );
Abc_NtkAddFrame( pNtkFrames, pNtk, i );
}
Extra_ProgressBarStop( pProgress );
// connect the new latches to the outputs of the last frame
if ( !fInitial )
{
// we cannot use pLatch->pCopy here because pLatch->pCopy is used for temporary storage of strashed values
Abc_NtkForEachLatch( pNtk, pLatch, i )
Abc_ObjAddFanin( Abc_ObjFanin0(pLatch)->pCopy, Abc_ObjFanout0(pLatch)->pCopy );
}
// remove dangling nodes
Abc_AigCleanup( pNtkFrames->pManFunc );
// reorder the latches
Abc_NtkOrderCisCos( pNtkFrames );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkFrames ) )
{
printf( "Abc_NtkFrames: The network check has failed.\n" );
Abc_NtkDelete( pNtkFrames );
return NULL;
}
return pNtkFrames;
}
/**Function*************************************************************
Synopsis [Adds one time frame to the new network.]
Description [Assumes that the latches of the old network point
to the outputs of the previous frame of the new network (pLatch->pCopy).
In the end, updates the latches of the old network to point to the
outputs of the current frame of the new network.]
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkAddFrame( Abc_Ntk_t * pNtkFrames, Abc_Ntk_t * pNtk, int iFrame )
{
char Buffer[10];
Abc_Obj_t * pNode, * pLatch;
int i;
// create the prefix to be added to the node names
sprintf( Buffer, "_%02d", iFrame );
// add the new PI nodes
Abc_NtkForEachPi( pNtk, pNode, i )
Abc_ObjAssignName( Abc_NtkDupObj(pNtkFrames, pNode, 0), Abc_ObjName(pNode), Buffer );
// add the internal nodes
Abc_AigForEachAnd( pNtk, pNode, i )
pNode->pCopy = Abc_AigAnd( pNtkFrames->pManFunc, Abc_ObjChild0Copy(pNode), Abc_ObjChild1Copy(pNode) );
// add the new POs
Abc_NtkForEachPo( pNtk, pNode, i )
{
Abc_ObjAssignName( Abc_NtkDupObj(pNtkFrames, pNode, 0), Abc_ObjName(pNode), Buffer );
Abc_ObjAddFanin( pNode->pCopy, Abc_ObjChild0Copy(pNode) );
}
// add the new asserts
Abc_NtkForEachAssert( pNtk, pNode, i )
{
Abc_ObjAssignName( Abc_NtkDupObj(pNtkFrames, pNode, 0), Abc_ObjName(pNode), Buffer );
Abc_ObjAddFanin( pNode->pCopy, Abc_ObjChild0Copy(pNode) );
}
// transfer the implementation of the latch inputs to the latch outputs
Abc_NtkForEachLatch( pNtk, pLatch, i )
pLatch->pCopy = Abc_ObjChild0Copy(Abc_ObjFanin0(pLatch));
Abc_NtkForEachLatch( pNtk, pLatch, i )
Abc_ObjFanout0(pLatch)->pCopy = pLatch->pCopy;
}
/**Function*************************************************************
Synopsis [Derives the timeframes of the network.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
Abc_Ntk_t * Abc_NtkFrames2( Abc_Ntk_t * pNtk, int nFrames, int fInitial, AddFrameMapping addFrameMapping, void* arg )
{
/*
char Buffer[1000];
ProgressBar * pProgress;
Abc_Ntk_t * pNtkFrames;
Vec_Ptr_t * vNodes;
Abc_Obj_t * pLatch, * pLatchNew;
int i, Counter;
assert( nFrames > 0 );
assert( Abc_NtkIsStrash(pNtk) );
// start the new network
pNtkFrames = Abc_NtkAlloc( ABC_NTK_STRASH, ABC_FUNC_AIG, 1 );
sprintf( Buffer, "%s_%d_frames", pNtk->pName, nFrames );
pNtkFrames->pName = Extra_UtilStrsav(Buffer);
// create new latches (or their initial values) and remember them in the new latches
if ( !fInitial )
{
Abc_NtkForEachLatch( pNtk, pLatch, i ) {
Abc_NtkDupObj( pNtkFrames, pLatch );
if (addFrameMapping) addFrameMapping(pLatch->pCopy, pLatch, 0, arg);
}
}
else
{
Counter = 0;
Abc_NtkForEachLatch( pNtk, pLatch, i )
{
if ( Abc_LatchIsInitDc(pLatch) ) // don't-care initial value - create a new PI
{
pLatch->pCopy = Abc_NtkCreatePi(pNtkFrames);
Abc_ObjAssignName( pLatch->pCopy, Abc_ObjName(pLatch), NULL );
Counter++;
}
else {
pLatch->pCopy = Abc_ObjNotCond( Abc_AigConst1(pNtkFrames), Abc_LatchIsInit0(pLatch) );
}
if (addFrameMapping) addFrameMapping(pLatch->pCopy, pLatch, 0, arg);
}
if ( Counter )
printf( "Warning: %d uninitialized latches are replaced by free PI variables.\n", Counter );
}
// create the timeframes
vNodes = Abc_NtkDfs( pNtk, 0 );
pProgress = Extra_ProgressBarStart( stdout, nFrames );
for ( i = 0; i < nFrames; i++ )
{
Extra_ProgressBarUpdate( pProgress, i, NULL );
Abc_NtkAddFrame2( pNtkFrames, pNtk, i, vNodes, addFrameMapping, arg );
}
Extra_ProgressBarStop( pProgress );
Vec_PtrFree( vNodes );
// connect the new latches to the outputs of the last frame
if ( !fInitial )
{
Abc_NtkForEachLatch( pNtk, pLatch, i )
{
pLatchNew = Abc_NtkBox(pNtkFrames, i);
Abc_ObjAddFanin( pLatchNew, pLatch->pCopy );
Abc_ObjAssignName( pLatchNew, Abc_ObjName(pLatch), NULL );
}
}
Abc_NtkForEachLatch( pNtk, pLatch, i )
pLatch->pNext = NULL;
// remove dangling nodes
Abc_AigCleanup( pNtkFrames->pManFunc );
// reorder the latches
Abc_NtkOrderCisCos( pNtkFrames );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtkFrames ) )
{
printf( "Abc_NtkFrames: The network check has failed.\n" );
Abc_NtkDelete( pNtkFrames );
return NULL;
}
return pNtkFrames;
*/
return NULL;
}
/**Function*************************************************************
Synopsis [Adds one time frame to the new network.]
Description [Assumes that the latches of the old network point
to the outputs of the previous frame of the new network (pLatch->pCopy).
In the end, updates the latches of the old network to point to the
outputs of the current frame of the new network.]
SideEffects []
SeeAlso []
***********************************************************************/
void Abc_NtkAddFrame2( Abc_Ntk_t * pNtkFrames, Abc_Ntk_t * pNtk, int iFrame, Vec_Ptr_t * vNodes, AddFrameMapping addFrameMapping, void* arg )
{
/*
char Buffer[10];
Abc_Obj_t * pNode, * pNodeNew, * pLatch;
Abc_Obj_t * pConst1, * pConst1New;
int i;
// get the constant nodes
pConst1 = Abc_AigConst1(pNtk);
pConst1New = Abc_AigConst1(pNtkFrames);
// create the prefix to be added to the node names
sprintf( Buffer, "_%02d", iFrame );
// add the new PI nodes
Abc_NtkForEachPi( pNtk, pNode, i )
{
pNodeNew = Abc_NtkDupObj( pNtkFrames, pNode );
Abc_ObjAssignName( pNodeNew, Abc_ObjName(pNode), Buffer );
if (addFrameMapping) addFrameMapping(pNodeNew, pNode, iFrame, arg);
}
// add the internal nodes
Vec_PtrForEachEntry( vNodes, pNode, i )
{
if ( pNode == pConst1 )
pNodeNew = pConst1New;
else
pNodeNew = Abc_AigAnd( pNtkFrames->pManFunc, Abc_ObjChild0Copy(pNode), Abc_ObjChild1Copy(pNode) );
pNode->pCopy = pNodeNew;
if (addFrameMapping) addFrameMapping(pNodeNew, pNode, iFrame, arg);
}
// add the new POs
Abc_NtkForEachPo( pNtk, pNode, i )
{
pNodeNew = Abc_NtkDupObj( pNtkFrames, pNode );
Abc_ObjAddFanin( pNodeNew, Abc_ObjChild0Copy(pNode) );
Abc_ObjAssignName( pNodeNew, Abc_ObjName(pNode), Buffer );
if (addFrameMapping) addFrameMapping(pNodeNew, pNode, iFrame, arg);
}
// transfer the implementation of the latch drivers to the latches
// it is important that these two steps are performed it two loops
// and not in the same loop
Abc_NtkForEachLatch( pNtk, pLatch, i )
pLatch->pNext = Abc_ObjChild0Copy(pLatch);
Abc_NtkForEachLatch( pNtk, pLatch, i )
pLatch->pCopy = pLatch->pNext;
Abc_NtkForEachLatch( pNtk, pLatch, i )
{
if (addFrameMapping) {
// don't give Mike complemented pointers because he doesn't like it
if (Abc_ObjIsComplement(pLatch->pCopy)) {
pNodeNew = Abc_NtkCreateNode( pNtkFrames );
Abc_ObjAddFanin( pNodeNew, pLatch->pCopy );
assert(Abc_ObjFaninNum(pNodeNew) == 1);
pNodeNew->Level = 1 + Abc_ObjRegular(pLatch->pCopy)->Level;
pLatch->pNext = pNodeNew;
pLatch->pCopy = pNodeNew;
}
addFrameMapping(pLatch->pCopy, pLatch, iFrame+1, arg);
}
}
*/
}
/**Function*************************************************************
Synopsis [Splits the miter into two logic cones combined by an EXOR]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkDemiter( Abc_Ntk_t * pNtk )
{
Abc_Obj_t * pNodeC, * pNodeA, * pNodeB, * pNode;
Abc_Obj_t * pPoNew;
Vec_Ptr_t * vNodes1, * vNodes2;
int nCommon, i;
assert( Abc_NtkIsStrash(pNtk) );
assert( Abc_NtkPoNum(pNtk) == 1 );
if ( !Abc_NodeIsExorType(Abc_ObjFanin0(Abc_NtkPo(pNtk,0))) )
{
printf( "The root of the miter is not an EXOR gate.\n" );
return 0;
}
pNodeC = Abc_NodeRecognizeMux( Abc_ObjFanin0(Abc_NtkPo(pNtk,0)), &pNodeA, &pNodeB );
assert( Abc_ObjRegular(pNodeA) == Abc_ObjRegular(pNodeB) );
if ( Abc_ObjFaninC0(Abc_NtkPo(pNtk,0)) )
{
pNodeA = Abc_ObjNot(pNodeA);
pNodeB = Abc_ObjNot(pNodeB);
}
// add the PO corresponding to control input
pPoNew = Abc_NtkCreatePo( pNtk );
Abc_ObjAddFanin( pPoNew, pNodeC );
Abc_ObjAssignName( pPoNew, "addOut1", NULL );
// add the PO corresponding to other input
pPoNew = Abc_NtkCreatePo( pNtk );
Abc_ObjAddFanin( pPoNew, pNodeB );
Abc_ObjAssignName( pPoNew, "addOut2", NULL );
// mark the nodes in the first cone
pNodeB = Abc_ObjRegular(pNodeB);
vNodes1 = Abc_NtkDfsNodes( pNtk, &pNodeC, 1 );
vNodes2 = Abc_NtkDfsNodes( pNtk, &pNodeB, 1 );
Vec_PtrForEachEntry( vNodes1, pNode, i )
pNode->fMarkA = 1;
nCommon = 0;
Vec_PtrForEachEntry( vNodes2, pNode, i )
nCommon += pNode->fMarkA;
Vec_PtrForEachEntry( vNodes1, pNode, i )
pNode->fMarkA = 0;
printf( "First cone = %6d. Second cone = %6d. Common = %6d.\n", vNodes1->nSize, vNodes2->nSize, nCommon );
Vec_PtrFree( vNodes1 );
Vec_PtrFree( vNodes2 );
// reorder the latches
Abc_NtkOrderCisCos( pNtk );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtk ) )
printf( "Abc_NtkDemiter: The network check has failed.\n" );
return 1;
}
/**Function*************************************************************
Synopsis [Computes OR or AND of the POs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
int Abc_NtkCombinePos( Abc_Ntk_t * pNtk, int fAnd )
{
Abc_Obj_t * pNode, * pMiter;
int i;
assert( Abc_NtkIsStrash(pNtk) );
assert( Abc_NtkLatchNum(pNtk) == 0 );
// start the result
if ( fAnd )
pMiter = Abc_AigConst1(pNtk);
else
pMiter = Abc_ObjNot( Abc_AigConst1(pNtk) );
// perform operations on the POs
Abc_NtkForEachPo( pNtk, pNode, i )
if ( fAnd )
pMiter = Abc_AigAnd( pNtk->pManFunc, pMiter, Abc_ObjChild0(pNode) );
else
pMiter = Abc_AigOr( pNtk->pManFunc, pMiter, Abc_ObjChild0(pNode) );
// remove the POs and their names
for ( i = Abc_NtkPoNum(pNtk) - 1; i >= 0; i-- )
Abc_NtkDeleteObj( Abc_NtkPo(pNtk, i) );
assert( Abc_NtkPoNum(pNtk) == 0 );
// create the new PO
pNode = Abc_NtkCreatePo( pNtk );
Abc_ObjAddFanin( pNode, pMiter );
Abc_ObjAssignName( pNode, "miter", NULL );
// make sure that everything is okay
if ( !Abc_NtkCheck( pNtk ) )
{
printf( "Abc_NtkOrPos: The network check has failed.\n" );
return 0;
}
return 1;
}
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
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