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-rw-r--r--src/opt/ret/retInit.c349
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diff --git a/src/opt/ret/retInit.c b/src/opt/ret/retInit.c
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--- a/src/opt/ret/retInit.c
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@@ -1,349 +0,0 @@
-/**CFile****************************************************************
-
- FileName [retInit.c]
-
- SystemName [ABC: Logic synthesis and verification system.]
-
- PackageName [Retiming package.]
-
- Synopsis [Initial state computation for backward retiming.]
-
- Author [Alan Mishchenko]
-
- Affiliation [UC Berkeley]
-
- Date [Ver. 1.0. Started - Oct 31, 2006.]
-
- Revision [$Id: retInit.c,v 1.00 2006/10/31 00:00:00 alanmi Exp $]
-
-***********************************************************************/
-
-#include "retInt.h"
-
-////////////////////////////////////////////////////////////////////////
-/// DECLARATIONS ///
-////////////////////////////////////////////////////////////////////////
-
-static int Abc_NtkRetimeVerifyModel( Abc_Ntk_t * pNtkCone, Vec_Int_t * vValues, int * pModel );
-
-////////////////////////////////////////////////////////////////////////
-/// FUNCTION DEFINITIONS ///
-////////////////////////////////////////////////////////////////////////
-
-/**Function*************************************************************
-
- Synopsis [Computes initial values of the new latches.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Vec_Int_t * Abc_NtkRetimeInitialValues( Abc_Ntk_t * pNtkCone, Vec_Int_t * vValues, int fVerbose )
-{
- Vec_Int_t * vSolution;
- Abc_Ntk_t * pNtkMiter, * pNtkLogic;
- int RetValue, clk;
- if ( pNtkCone == NULL )
- return Vec_IntDup( vValues );
- // convert the target network to AIG
- pNtkLogic = Abc_NtkDup( pNtkCone );
- Abc_NtkToAig( pNtkLogic );
- // get the miter
- pNtkMiter = Abc_NtkCreateTarget( pNtkLogic, pNtkLogic->vCos, vValues );
- if ( fVerbose )
- printf( "The miter for initial state computation has %d AIG nodes. ", Abc_NtkNodeNum(pNtkMiter) );
- // solve the miter
- clk = clock();
- RetValue = Abc_NtkMiterSat( pNtkMiter, (sint64)500000, (sint64)50000000, 0, NULL, NULL );
- if ( fVerbose )
- { PRT( "SAT solving time", clock() - clk ); }
- // analyze the result
- if ( RetValue == 1 )
- printf( "Abc_NtkRetimeInitialValues(): The problem is unsatisfiable. DC latch values are used.\n" );
- else if ( RetValue == -1 )
- printf( "Abc_NtkRetimeInitialValues(): The SAT problem timed out. DC latch values are used.\n" );
- else if ( !Abc_NtkRetimeVerifyModel( pNtkCone, vValues, pNtkMiter->pModel ) )
- printf( "Abc_NtkRetimeInitialValues(): The computed counter-example is incorrect.\n" );
- // set the values of the latches
- vSolution = RetValue? NULL : Vec_IntAllocArray( pNtkMiter->pModel, Abc_NtkPiNum(pNtkLogic) );
- pNtkMiter->pModel = NULL;
- Abc_NtkDelete( pNtkMiter );
- Abc_NtkDelete( pNtkLogic );
- return vSolution;
-}
-
-/**Function*************************************************************
-
- Synopsis [Computes the results of simulating one node.]
-
- Description [Assumes that fanins have pCopy set to the input values.]
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Abc_ObjSopSimulate( Abc_Obj_t * pObj )
-{
- char * pCube, * pSop = pObj->pData;
- int nVars, Value, v, ResOr, ResAnd, ResVar;
- assert( pSop && !Abc_SopIsExorType(pSop) );
- // simulate the SOP of the node
- ResOr = 0;
- nVars = Abc_SopGetVarNum(pSop);
- Abc_SopForEachCube( pSop, nVars, pCube )
- {
- ResAnd = 1;
- Abc_CubeForEachVar( pCube, Value, v )
- {
- if ( Value == '0' )
- ResVar = 1 ^ ((int)Abc_ObjFanin(pObj, v)->pCopy);
- else if ( Value == '1' )
- ResVar = (int)Abc_ObjFanin(pObj, v)->pCopy;
- else
- continue;
- ResAnd &= ResVar;
- }
- ResOr |= ResAnd;
- }
- // complement the result if necessary
- if ( !Abc_SopGetPhase(pSop) )
- ResOr ^= 1;
- return ResOr;
-}
-
-/**Function*************************************************************
-
- Synopsis [Verifies the counter-example.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-int Abc_NtkRetimeVerifyModel( Abc_Ntk_t * pNtkCone, Vec_Int_t * vValues, int * pModel )
-{
- Vec_Ptr_t * vNodes;
- Abc_Obj_t * pObj;
- int i, Counter = 0;
- assert( Abc_NtkIsSopLogic(pNtkCone) );
- // set the PIs
- Abc_NtkForEachPi( pNtkCone, pObj, i )
- pObj->pCopy = (void *)pModel[i];
- // simulate the internal nodes
- vNodes = Abc_NtkDfs( pNtkCone, 0 );
- Vec_PtrForEachEntry( vNodes, pObj, i )
- pObj->pCopy = (void *)Abc_ObjSopSimulate( pObj );
- Vec_PtrFree( vNodes );
- // compare the outputs
- Abc_NtkForEachPo( pNtkCone, pObj, i )
- pObj->pCopy = Abc_ObjFanin0(pObj)->pCopy;
- Abc_NtkForEachPo( pNtkCone, pObj, i )
- Counter += (Vec_IntEntry(vValues, i) != (int)pObj->pCopy);
- if ( Counter > 0 )
- printf( "%d outputs (out of %d) have a value mismatch.\n", Counter, Abc_NtkPoNum(pNtkCone) );
- return 1;
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values to pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Abc_NtkRetimeTranferToCopy( Abc_Ntk_t * pNtk )
-{
- Abc_Obj_t * pObj;
- int i;
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- pObj->pCopy = (void *)Abc_LatchIsInit1(pObj);
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values from pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Abc_NtkRetimeTranferFromCopy( Abc_Ntk_t * pNtk )
-{
- Abc_Obj_t * pObj;
- int i;
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- pObj->pData = (void *)(pObj->pCopy? ABC_INIT_ONE : ABC_INIT_ZERO);
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values to pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Vec_Int_t * Abc_NtkRetimeCollectLatchValues( Abc_Ntk_t * pNtk )
-{
- Vec_Int_t * vValues;
- Abc_Obj_t * pObj;
- int i;
- vValues = Vec_IntAlloc( Abc_NtkLatchNum(pNtk) );
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- Vec_IntPush( vValues, Abc_LatchIsInit1(pObj) );
- return vValues;
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values from pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Abc_NtkRetimeInsertLatchValues( Abc_Ntk_t * pNtk, Vec_Int_t * vValues )
-{
- Abc_Obj_t * pObj;
- int i, Counter = 0;
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- pObj->pCopy = (void *)Counter++;
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- pObj->pData = (void *)(vValues? (Vec_IntEntry(vValues,(int)pObj->pCopy)? ABC_INIT_ONE : ABC_INIT_ZERO) : ABC_INIT_DC);
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values to pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-Abc_Ntk_t * Abc_NtkRetimeBackwardInitialStart( Abc_Ntk_t * pNtk )
-{
- Abc_Ntk_t * pNtkNew;
- Abc_Obj_t * pObj;
- int i;
- // create the network used for the initial state computation
- pNtkNew = Abc_NtkAlloc( ABC_NTK_LOGIC, ABC_FUNC_SOP, 1 );
- // create POs corresponding to the initial values
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- pObj->pCopy = Abc_NtkCreatePo(pNtkNew);
- return pNtkNew;
-}
-
-/**Function*************************************************************
-
- Synopsis [Transfer latch initial values to pCopy.]
-
- Description []
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Abc_NtkRetimeBackwardInitialFinish( Abc_Ntk_t * pNtk, Abc_Ntk_t * pNtkNew, Vec_Int_t * vValuesOld, int fVerbose )
-{
- Vec_Int_t * vValuesNew;
- Abc_Obj_t * pObj;
- int i;
- // create PIs corresponding to the initial values
- Abc_NtkForEachObj( pNtk, pObj, i )
- if ( Abc_ObjIsLatch(pObj) )
- Abc_ObjAddFanin( pObj->pCopy, Abc_NtkCreatePi(pNtkNew) );
- // assign dummy node names
- Abc_NtkAddDummyPiNames( pNtkNew );
- Abc_NtkAddDummyPoNames( pNtkNew );
- // check the network
- if ( !Abc_NtkCheck( pNtkNew ) )
- fprintf( stdout, "Abc_NtkRetimeBackwardInitialFinish(): Network check has failed.\n" );
- // derive new initial values
- vValuesNew = Abc_NtkRetimeInitialValues( pNtkNew, vValuesOld, fVerbose );
- // insert new initial values
- Abc_NtkRetimeInsertLatchValues( pNtk, vValuesNew );
- if ( vValuesNew ) Vec_IntFree( vValuesNew );
-}
-
-
-/**Function*************************************************************
-
- Synopsis [Cycles the circuit to create a new initial state.]
-
- Description [Simulates the circuit with random input for the given
- number of timeframes to get a better initial state.]
-
- SideEffects []
-
- SeeAlso []
-
-***********************************************************************/
-void Abc_NtkCycleInitStateSop( Abc_Ntk_t * pNtk, int nFrames, int fVerbose )
-{
- Vec_Ptr_t * vNodes;
- Abc_Obj_t * pObj;
- int i, f;
- assert( Abc_NtkIsSopLogic(pNtk) );
- srand( 0x12341234 );
- // initialize the values
- Abc_NtkForEachPi( pNtk, pObj, i )
- pObj->pCopy = (void *)(rand() & 1);
- Abc_NtkForEachLatch( pNtk, pObj, i )
- pObj->pCopy = (void *)Abc_LatchIsInit1(pObj);
- // simulate for the given number of timeframes
- vNodes = Abc_NtkDfs( pNtk, 0 );
- for ( f = 0; f < nFrames; f++ )
- {
- // simulate internal nodes
- Vec_PtrForEachEntry( vNodes, pObj, i )
- pObj->pCopy = (void *)Abc_ObjSopSimulate( pObj );
- // bring the results to the COs
- Abc_NtkForEachCo( pNtk, pObj, i )
- pObj->pCopy = Abc_ObjFanin0(pObj)->pCopy;
- // assign PI values
- Abc_NtkForEachPi( pNtk, pObj, i )
- pObj->pCopy = (void *)(rand() & 1);
- // transfer the latch values
- Abc_NtkForEachLatch( pNtk, pObj, i )
- Abc_ObjFanout0(pObj)->pCopy = Abc_ObjFanin0(pObj)->pCopy;
- }
- Vec_PtrFree( vNodes );
- // set the final values
- Abc_NtkForEachLatch( pNtk, pObj, i )
- pObj->pData = (void *)(Abc_ObjFanout0(pObj)->pCopy ? ABC_INIT_ONE : ABC_INIT_ZERO);
-}
-
-////////////////////////////////////////////////////////////////////////
-/// END OF FILE ///
-////////////////////////////////////////////////////////////////////////
-
-
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