/**CFile****************************************************************

  FileName    [reoTest.c]

  PackageName [REO: A specialized DD reordering engine.]

  Synopsis    [Various testing procedures (may be outdated).]

  Author      [Alan Mishchenko <alanmi@ece.pdx.edu>]
  
  Affiliation [ECE Department. Portland State University, Portland, Oregon.]

  Date        [Ver. 1.0. Started - October 15, 2002.]

  Revision    [$Id: reoTest.c,v 1.0 2002/15/10 03:00:00 alanmi Exp $]

***********************************************************************/

#include "reo.h"

ABC_NAMESPACE_IMPL_START


////////////////////////////////////////////////////////////////////////
///                        DECLARATIONS                              ///
////////////////////////////////////////////////////////////////////////

////////////////////////////////////////////////////////////////////////
///                    FUNCTION DEFINITIONS                          ///
////////////////////////////////////////////////////////////////////////

/**Function*************************************************************

  Synopsis    [Reorders the DD using REO and CUDD.]

  Description [This function can be used to test the performance of the reordering package.]

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Extra_ReorderTest( DdManager * dd, DdNode * Func )
{
    reo_man * pReo;
    DdNode * Temp, * Temp1;
    int pOrder[1000];

    pReo = Extra_ReorderInit( 100, 100 );

//Extra_DumpDot( dd, &Func, 1, "beforReo.dot", 0 );
    Temp  = Extra_Reorder( pReo, dd, Func, pOrder );  Cudd_Ref( Temp );
//Extra_DumpDot( dd, &Temp, 1, "afterReo.dot", 0 );

    Temp1 = Extra_ReorderCudd(dd, Func, NULL );           Cudd_Ref( Temp1 );
printf( "Initial = %d. Final = %d. Cudd = %d.\n", Cudd_DagSize(Func), Cudd_DagSize(Temp), Cudd_DagSize(Temp1)  );
    Cudd_RecursiveDeref( dd, Temp1 );
    Cudd_RecursiveDeref( dd, Temp );
 
    Extra_ReorderQuit( pReo );
}


/**Function*************************************************************

  Synopsis    [Reorders the DD using REO and CUDD.]

  Description [This function can be used to test the performance of the reordering package.]

  SideEffects []

  SeeAlso     []

***********************************************************************/
void Extra_ReorderTestArray( DdManager * dd, DdNode * Funcs[], int nFuncs )
{
    reo_man * pReo;
    DdNode * FuncsRes[1000];
    int pOrder[1000];
    int i;

    pReo = Extra_ReorderInit( 100, 100 );
    Extra_ReorderArray( pReo, dd, Funcs, FuncsRes, nFuncs, pOrder );  
    Extra_ReorderQuit( pReo );

printf( "Initial = %d. Final = %d.\n", Cudd_SharingSize(Funcs,nFuncs), Cudd_SharingSize(FuncsRes,nFuncs) );

    for ( i = 0; i < nFuncs; i++ )
        Cudd_RecursiveDeref( dd, FuncsRes[i] );

}

/**Function*************************************************************

  Synopsis    [Reorders the DD using CUDD package.]

  Description [Transfers the DD into a temporary manager in such a way
  that the level correspondence is preserved. Reorders the manager
  and transfers the DD back into the original manager using the topmost
  levels of the manager, in such a way that the ordering of levels is
  preserved. The resulting permutation is returned in the array
  given by the user.]

  SideEffects []

  SeeAlso     []

***********************************************************************/
DdNode * Extra_ReorderCudd( DdManager * dd, DdNode * aFunc, int pPermuteReo[] )
{
    static DdManager * ddReorder = NULL;
    static int * Permute     = NULL;
    static int * PermuteReo1 = NULL;
    static int * PermuteReo2 = NULL;
    DdNode * aFuncReorder, * aFuncNew;
    int lev, var;

    // start the reordering manager
    if ( ddReorder == NULL )
    {
        Permute       = ABC_ALLOC( int, dd->size );
        PermuteReo1   = ABC_ALLOC( int, dd->size );
        PermuteReo2   = ABC_ALLOC( int, dd->size );
        ddReorder = Cudd_Init( dd->size, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0 );
        Cudd_AutodynDisable(ddReorder);
    }

    // determine the permutation of variable to make sure that var order in bFunc
    // will not change when this function is transfered into the new manager
    for ( lev = 0; lev < dd->size; lev++ )
    {
        Permute[ dd->invperm[lev] ] = ddReorder->invperm[lev];
        PermuteReo1[ ddReorder->invperm[lev] ] = dd->invperm[lev];
    }
    // transfer this function into the new manager in such a way that ordering of vars does not change
    aFuncReorder = Extra_TransferPermute( dd, ddReorder, aFunc, Permute );  Cudd_Ref( aFuncReorder );
//    assert( Cudd_DagSize(aFunc) == Cudd_DagSize(aFuncReorder)  );

    // perform the reordering
printf( "Nodes before = %d.\n", Cudd_DagSize(aFuncReorder) );
    Cudd_ReduceHeap( ddReorder, CUDD_REORDER_SYMM_SIFT, 1 );
printf( "Nodes before = %d.\n", Cudd_DagSize(aFuncReorder) );

    // determine the reverse variable permutation
    for ( lev = 0; lev < dd->size; lev++ )
    {
        Permute[ ddReorder->invperm[lev] ] = dd->invperm[lev];
        PermuteReo2[ dd->invperm[lev] ] = ddReorder->invperm[lev];
    }

    // transfer this function into the new manager in such a way that ordering of vars does not change
    aFuncNew = Extra_TransferPermute( ddReorder, dd, aFuncReorder, Permute );  Cudd_Ref( aFuncNew );
//    assert( Cudd_DagSize(aFuncNew) == Cudd_DagSize(aFuncReorder)  );
    Cudd_RecursiveDeref( ddReorder, aFuncReorder );

    // derive the resulting variable ordering
    if ( pPermuteReo )
        for ( var = 0; var < dd->size; var++ )
            pPermuteReo[var] = PermuteReo1[ PermuteReo2[var] ];

    Cudd_Deref( aFuncNew );
    return aFuncNew;
}


/**Function*************************************************************

  Synopsis    []

  Description [Transfers the BDD into another manager minimizes it and 
  returns the min number of nodes; disposes of the BDD in the new manager.
  Useful for debugging or comparing the performance of other reordering
  procedures.]

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Extra_bddReorderTest( DdManager * dd, DdNode * bF )
{
    static DdManager * s_ddmin;
    DdNode * bFmin;
    int  nNodes;
//    clock_t clk1;

    if ( s_ddmin == NULL )
        s_ddmin = Cudd_Init( dd->size, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0);

//    Cudd_ShuffleHeap( s_ddmin, dd->invperm );

//    clk1 = clock();
    bFmin = Cudd_bddTransfer( dd, s_ddmin, bF );  Cudd_Ref( bFmin );
    Cudd_ReduceHeap(s_ddmin,CUDD_REORDER_SIFT,1);
//    Cudd_ReduceHeap(s_ddmin,CUDD_REORDER_SYMM_SIFT,1);
    nNodes = Cudd_DagSize( bFmin );
    Cudd_RecursiveDeref( s_ddmin, bFmin );

//    printf( "Classical variable reordering time = %.2f sec\n", (float)(clock() - clk1)/(float)(CLOCKS_PER_SEC) );
    return nNodes;
}

/**Function*************************************************************

  Synopsis    []

  Description [Transfers the ADD into another manager minimizes it and 
  returns the min number of nodes; disposes of the BDD in the new manager.
  Useful for debugging or comparing the performance of other reordering
  procedures.]

  SideEffects []

  SeeAlso     []

***********************************************************************/
int Extra_addReorderTest( DdManager * dd, DdNode * aF )
{
    static DdManager * s_ddmin;
    DdNode * bF;
    DdNode * bFmin;
    DdNode * aFmin;
    int  nNodesBeg;
    int  nNodesEnd;
    clock_t clk1;

    if ( s_ddmin == NULL )
        s_ddmin = Cudd_Init( dd->size, 0, CUDD_UNIQUE_SLOTS, CUDD_CACHE_SLOTS, 0);

//    Cudd_ShuffleHeap( s_ddmin, dd->invperm );

    clk1 = clock();
    bF    = Cudd_addBddPattern( dd, aF );         Cudd_Ref( bF );
    bFmin = Cudd_bddTransfer( dd, s_ddmin, bF );  Cudd_Ref( bFmin );
    Cudd_RecursiveDeref( dd, bF );
    aFmin = Cudd_BddToAdd( s_ddmin, bFmin );      Cudd_Ref( aFmin );
    Cudd_RecursiveDeref( s_ddmin, bFmin );

    nNodesBeg = Cudd_DagSize( aFmin );
    Cudd_ReduceHeap(s_ddmin,CUDD_REORDER_SIFT,1);
//    Cudd_ReduceHeap(s_ddmin,CUDD_REORDER_SYMM_SIFT,1);
    nNodesEnd = Cudd_DagSize( aFmin );
    Cudd_RecursiveDeref( s_ddmin, aFmin );

    printf( "Classical reordering of ADDs: Before = %d. After = %d.\n", nNodesBeg, nNodesEnd );
    printf( "Classical variable reordering time = %.2f sec\n", (float)(clock() - clk1)/(float)(CLOCKS_PER_SEC) );
    return nNodesEnd;
}


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///                         END OF FILE                              ///
////////////////////////////////////////////////////////////////////////

ABC_NAMESPACE_IMPL_END

