int
hypre_SMGRelaxSetupTempVec( void               *relax_vdata,
                            hypre_StructMatrix *A,
                            hypre_StructVector *b,
                            hypre_StructVector *x           )
{
   hypre_SMGRelaxData  *relax_data = relax_vdata;
   hypre_StructVector  *temp_vec   = (relax_data -> temp_vec);
   int                  ierr = 0;

   /*----------------------------------------------------------
    * Set up data
    *----------------------------------------------------------*/

   if ((relax_data -> temp_vec) == NULL)
   {
      temp_vec = hypre_StructVectorCreate(hypre_StructVectorComm(b),
                                          hypre_StructVectorGrid(b));
      hypre_StructVectorSetNumGhost(temp_vec, hypre_StructVectorNumGhost(b));
      hypre_StructVectorInitialize(temp_vec);
      hypre_StructVectorAssemble(temp_vec);
      (relax_data -> temp_vec) = temp_vec;
   }
   (relax_data -> setup_temp_vec) = 0;

   return ierr;
}
int
hypre_SMGRelaxSetupBaseBoxArray( void               *relax_vdata,
                                 hypre_StructMatrix *A,
                                 hypre_StructVector *b,
                                 hypre_StructVector *x           )
{
   hypre_SMGRelaxData  *relax_data = relax_vdata;
                       
   hypre_StructGrid    *grid;
   hypre_BoxArray      *boxes;
   hypre_BoxArray      *base_box_array;
                       
   int                  ierr = 0;

   grid  = hypre_StructVectorGrid(x);
   boxes = hypre_StructGridBoxes(grid);

   base_box_array = hypre_BoxArrayDuplicate(boxes);
   hypre_ProjectBoxArray(base_box_array, 
                         (relax_data -> base_index),
                         (relax_data -> base_stride));

   (relax_data -> base_box_array) = base_box_array;

   return ierr;
}
int 
HYPRE_StructVectorSetBoxValues( HYPRE_StructVector  vector,
                                int                *ilower,
                                int                *iupper,
                                double             *values )
{
   hypre_Index   new_ilower;
   hypre_Index   new_iupper;
   hypre_Box    *new_value_box;
                 
   int           d;
   int           ierr = 0;

   hypre_ClearIndex(new_ilower);
   hypre_ClearIndex(new_iupper);
   for (d = 0; d < hypre_StructGridDim(hypre_StructVectorGrid(vector)); d++)
   {
      hypre_IndexD(new_ilower, d) = ilower[d];
      hypre_IndexD(new_iupper, d) = iupper[d];
   }
   new_value_box = hypre_BoxCreate();
   hypre_BoxSetExtents(new_value_box, new_ilower, new_iupper);

   ierr = hypre_StructVectorSetBoxValues(vector, new_value_box, values, 0 );

   hypre_BoxDestroy(new_value_box);

   return ierr;
}
Ejemplo n.º 4
0
void *
hypre_StructKrylovCreateVector( void *vvector )
{
   hypre_StructVector *vector = vvector;
   hypre_StructVector *new_vector;

   new_vector = hypre_StructVectorCreate( hypre_StructVectorComm(vector),
                                          hypre_StructVectorGrid(vector) );
   hypre_StructVectorInitialize(new_vector);
   hypre_StructVectorAssemble(new_vector);

   return ( (void *) new_vector );
}
Ejemplo n.º 5
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int
hypre_StructCopy( hypre_StructVector *x,
                  hypre_StructVector *y     )
{
   int ierr = 0;

   hypre_Box       *x_data_box;
   hypre_Box       *y_data_box;
                   
   int              xi;
   int              yi;
                   
   double          *xp;
   double          *yp;
                   
   hypre_BoxArray  *boxes;
   hypre_Box       *box;
   hypre_Index      loop_size;
   hypre_IndexRef   start;
   hypre_Index      unit_stride;
                   
   int              i;
   int              loopi, loopj, loopk;

   hypre_SetIndex(unit_stride, 1, 1, 1);

   boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
   hypre_ForBoxI(i, boxes)
      {
         box   = hypre_BoxArrayBox(boxes, i);
         start = hypre_BoxIMin(box);

         x_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(x), i);
         y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);

         xp = hypre_StructVectorBoxData(x, i);
         yp = hypre_StructVectorBoxData(y, i);

         hypre_BoxGetSize(box, loop_size);

         hypre_BoxLoop2Begin(loop_size,
                             x_data_box, start, unit_stride, xi,
                             y_data_box, start, unit_stride, yi);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,xi,yi
#include "hypre_box_smp_forloop.h"
	 hypre_BoxLoop2For(loopi, loopj, loopk, xi, yi)
            {
               yp[yi] = xp[xi];
            }
         hypre_BoxLoop2End(xi, yi);
      }
Ejemplo n.º 6
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int
hypre_SMGAxpy( double              alpha,
               hypre_StructVector *x,
               hypre_StructVector *y,
               hypre_Index         base_index,
               hypre_Index         base_stride )
{
   int ierr = 0;

   hypre_Box        *x_data_box;
   hypre_Box        *y_data_box;
                 
   int               xi;
   int               yi;
                    
   double           *xp;
   double           *yp;
                    
   hypre_BoxArray   *boxes;
   hypre_Box        *box;
   hypre_Index       loop_size;
   hypre_IndexRef    start;
                    
   int               i;
   int               loopi, loopj, loopk;

   box = hypre_BoxCreate();
   boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
   hypre_ForBoxI(i, boxes)
      {
         hypre_CopyBox(hypre_BoxArrayBox(boxes, i), box);
         hypre_ProjectBox(box, base_index, base_stride);
         start = hypre_BoxIMin(box);

         x_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(x), i);
         y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);

         xp = hypre_StructVectorBoxData(x, i);
         yp = hypre_StructVectorBoxData(y, i);

         hypre_BoxGetStrideSize(box, base_stride, loop_size);
         hypre_BoxLoop2Begin(loop_size,
                             x_data_box, start, base_stride, xi,
                             y_data_box, start, base_stride, yi);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,xi,yi
#include "hypre_box_smp_forloop.h"
	 hypre_BoxLoop2For(loopi, loopj, loopk, xi, yi)
            {
               yp[yi] += alpha * xp[xi];
            }
Ejemplo n.º 7
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void *
hypre_StructKrylovCreateVector( void *vvector )
{
   hypre_StructVector *vector = vvector;
   hypre_StructVector *new_vector;
   HYPRE_Int          *num_ghost= hypre_StructVectorNumGhost(vector);

   new_vector = hypre_StructVectorCreate( hypre_StructVectorComm(vector),
                                          hypre_StructVectorGrid(vector) );
   hypre_StructVectorSetNumGhost(new_vector, num_ghost);
   hypre_StructVectorInitialize(new_vector);
   hypre_StructVectorAssemble(new_vector);

   return ( (void *) new_vector );
}
Ejemplo n.º 8
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HYPRE_Int 
hypre_StructVectorSetRandomValues( hypre_StructVector *vector,
                                   HYPRE_Int seed )
{
   hypre_Box          *v_data_box;
                    
   HYPRE_Int           vi;
   double             *vp;

   hypre_BoxArray     *boxes;
   hypre_Box          *box;
   hypre_Index         loop_size;
   hypre_IndexRef      start;
   hypre_Index         unit_stride;

   HYPRE_Int           i;

   /*-----------------------------------------------------------------------
    * Set the vector coefficients
    *-----------------------------------------------------------------------*/

   srand( seed );

   hypre_SetIndex(unit_stride, 1, 1, 1);
 
   boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(vector));
   hypre_ForBoxI(i, boxes)
   {
      box      = hypre_BoxArrayBox(boxes, i);
      start = hypre_BoxIMin(box);

      v_data_box =
         hypre_BoxArrayBox(hypre_StructVectorDataSpace(vector), i);
      vp = hypre_StructVectorBoxData(vector, i);
 
      hypre_BoxGetSize(box, loop_size);

      hypre_BoxLoop1Begin(hypre_StructVectorDim(vector), loop_size,
                          v_data_box, start, unit_stride, vi);
#ifdef HYPRE_USING_OPENMP
#pragma omp parallel for private(HYPRE_BOX_PRIVATE,vi ) HYPRE_SMP_SCHEDULE
#endif
      hypre_BoxLoop1For(vi)
      {
         vp[vi] = 2.0*rand()/RAND_MAX - 1.0;
      }
      hypre_BoxLoop1End(vi);
   }
Ejemplo n.º 9
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HYPRE_Int
hypre_SparseMSGInterpSetup( void               *interp_vdata,
                            hypre_StructMatrix *P,
                            hypre_StructVector *xc,
                            hypre_StructVector *e,
                            hypre_Index         cindex,
                            hypre_Index         findex,
                            hypre_Index         stride,
                            hypre_Index         strideP       )
{
   hypre_SparseMSGInterpData   *interp_data = interp_vdata;

   hypre_StructGrid       *grid;
   hypre_StructStencil    *stencil;
                       
   hypre_ComputeInfo      *compute_info;
   hypre_ComputePkg       *compute_pkg;

   HYPRE_Int               ierr = 0;

   /*----------------------------------------------------------
    * Set up the compute package
    *----------------------------------------------------------*/

   grid    = hypre_StructVectorGrid(e);
   stencil = hypre_StructMatrixStencil(P);

   hypre_CreateComputeInfo(grid, stencil, &compute_info);
   hypre_ComputeInfoProjectSend(compute_info, cindex, stride);
   hypre_ComputeInfoProjectRecv(compute_info, cindex, stride);
   hypre_ComputeInfoProjectComp(compute_info, findex, stride);
   hypre_ComputePkgCreate(compute_info, hypre_StructVectorDataSpace(e), 1,
                          grid, &compute_pkg);

   /*----------------------------------------------------------
    * Set up the interp data structure
    *----------------------------------------------------------*/

   (interp_data -> P) = hypre_StructMatrixRef(P);
   (interp_data -> compute_pkg) = compute_pkg;
   hypre_CopyIndex(cindex, (interp_data -> cindex));
   hypre_CopyIndex(findex, (interp_data -> findex));
   hypre_CopyIndex(stride, (interp_data -> stride));
   hypre_CopyIndex(strideP, (interp_data -> strideP));

   return ierr;
}
Ejemplo n.º 10
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int 
hypre_StructVectorInitializeShell( hypre_StructVector *vector )
{
   int    ierr = 0;

   hypre_StructGrid     *grid;

   int                  *num_ghost;
 
   hypre_BoxArray       *data_space;
   hypre_BoxArray       *boxes;
   hypre_Box            *box;
   hypre_Box            *data_box;

   int                  *data_indices;
   int                   data_size;
                     
   int                   i, d;
 
   /*-----------------------------------------------------------------------
    * Set up data_space
    *-----------------------------------------------------------------------*/

   grid = hypre_StructVectorGrid(vector);

   if (hypre_StructVectorDataSpace(vector) == NULL)
   {
      num_ghost = hypre_StructVectorNumGhost(vector);

      boxes = hypre_StructGridBoxes(grid);
      data_space = hypre_BoxArrayCreate(hypre_BoxArraySize(boxes));

      hypre_ForBoxI(i, boxes)
         {
            box = hypre_BoxArrayBox(boxes, i);
            data_box = hypre_BoxArrayBox(data_space, i);

            hypre_CopyBox(box, data_box);
            for (d = 0; d < 3; d++)
            {
               hypre_BoxIMinD(data_box, d) -= num_ghost[2*d];
               hypre_BoxIMaxD(data_box, d) += num_ghost[2*d + 1];
            }
         }
Ejemplo n.º 11
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HYPRE_Int 
HYPRE_StructVectorSetValues( HYPRE_StructVector  vector,
                             HYPRE_Int          *grid_index,
                             double              values )
{
   hypre_Index  new_grid_index;
                
   HYPRE_Int    d;

   hypre_ClearIndex(new_grid_index);
   for (d = 0; d < hypre_StructGridDim(hypre_StructVectorGrid(vector)); d++)
   {
      hypre_IndexD(new_grid_index, d) = grid_index[d];
   }

   hypre_StructVectorSetValues(vector, new_grid_index, &values, 0, -1, 0);

   return hypre_error_flag;
}
Ejemplo n.º 12
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int
hypre_StructScale( double              alpha,
                   hypre_StructVector *y     )
{
   int ierr = 0;

   hypre_Box       *y_data_box;
                   
   int              yi;
   double          *yp;
                   
   hypre_BoxArray  *boxes;
   hypre_Box       *box;
   hypre_Index      loop_size;
   hypre_IndexRef   start;
   hypre_Index      unit_stride;
                   
   int              i;
   int              loopi, loopj, loopk;

   hypre_SetIndex(unit_stride, 1, 1, 1);

   boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
   hypre_ForBoxI(i, boxes)
      {
         box   = hypre_BoxArrayBox(boxes, i);
         start = hypre_BoxIMin(box);

         y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);
         yp = hypre_StructVectorBoxData(y, i);

         hypre_BoxGetSize(box, loop_size);

	 hypre_BoxLoop1Begin(loop_size,
                             y_data_box, start, unit_stride, yi);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,yi
#include "hypre_box_smp_forloop.h"
	 hypre_BoxLoop1For(loopi, loopj, loopk, yi)
            {
               yp[yi] *= alpha;
            }
	 hypre_BoxLoop1End(yi);
      }
Ejemplo n.º 13
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void *
hypre_StructKrylovCreateVectorArray(int n, void *vvector )
{
   hypre_StructVector *vector = vvector;
   hypre_StructVector **new_vector;
   int i;

   new_vector = hypre_CTAlloc(hypre_StructVector*,n);
   for (i=0; i < n; i++)
   {
      HYPRE_StructVectorCreate(hypre_StructVectorComm(vector),
                                hypre_StructVectorGrid(vector),
                                (HYPRE_StructVector *) &new_vector[i] );
      HYPRE_StructVectorInitialize((HYPRE_StructVector) new_vector[i]);
      HYPRE_StructVectorAssemble((HYPRE_StructVector) new_vector[i]);
   }

   return ( (void *) new_vector );
}
int 
HYPRE_StructVectorSetValues( HYPRE_StructVector  vector,
                             int                *grid_index,
                             double              values )
{
   hypre_Index  new_grid_index;
                
   int          d;
   int          ierr = 0;

   hypre_ClearIndex(new_grid_index);
   for (d = 0; d < hypre_StructGridDim(hypre_StructVectorGrid(vector)); d++)
   {
      hypre_IndexD(new_grid_index, d) = grid_index[d];
   }

   ierr = hypre_StructVectorSetValues(vector, new_grid_index, values, 0);

   return ierr;
}
Ejemplo n.º 15
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HYPRE_Int
hypre_StructScale( double              alpha,
                   hypre_StructVector *y     )
{
   hypre_Box       *y_data_box;
                   
   HYPRE_Int        yi;
   double          *yp;
                   
   hypre_BoxArray  *boxes;
   hypre_Box       *box;
   hypre_Index      loop_size;
   hypre_IndexRef   start;
   hypre_Index      unit_stride;
                   
   HYPRE_Int        i;

   hypre_SetIndex(unit_stride, 1, 1, 1);

   boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
   hypre_ForBoxI(i, boxes)
   {
      box   = hypre_BoxArrayBox(boxes, i);
      start = hypre_BoxIMin(box);

      y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);
      yp = hypre_StructVectorBoxData(y, i);

      hypre_BoxGetSize(box, loop_size);

      hypre_BoxLoop1Begin(hypre_StructVectorDim(y), loop_size,
                          y_data_box, start, unit_stride, yi);
#ifdef HYPRE_USING_OPENMP
#pragma omp parallel for private(HYPRE_BOX_PRIVATE,yi) HYPRE_SMP_SCHEDULE
#endif
      hypre_BoxLoop1For(yi)
      {
         yp[yi] *= alpha;
      }
      hypre_BoxLoop1End(yi);
   }
Ejemplo n.º 16
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HYPRE_Int 
hypre_StructVectorDestroy( hypre_StructVector *vector )
{
   if (vector)
   {
      hypre_StructVectorRefCount(vector) --;
      if (hypre_StructVectorRefCount(vector) == 0)
      {
         if (hypre_StructVectorDataAlloced(vector))
         {
            hypre_SharedTFree(hypre_StructVectorData(vector));
         }
         hypre_TFree(hypre_StructVectorDataIndices(vector));
         hypre_BoxArrayDestroy(hypre_StructVectorDataSpace(vector));
         hypre_StructGridDestroy(hypre_StructVectorGrid(vector));
         hypre_TFree(vector);
      }
   }

   return hypre_error_flag;
}
Ejemplo n.º 17
0
hypre_StructVector *
hypre_StructVectorCreate( MPI_Comm          comm,
                          hypre_StructGrid *grid )
{
   hypre_StructVector  *vector;

   int                  i;

   vector = hypre_CTAlloc(hypre_StructVector, 1);

   hypre_StructVectorComm(vector)        = comm;
   hypre_StructGridRef(grid, &hypre_StructVectorGrid(vector));
   hypre_StructVectorDataAlloced(vector) = 1;
   hypre_StructVectorRefCount(vector)    = 1;

   /* set defaults */
   for (i = 0; i < 6; i++)
      hypre_StructVectorNumGhost(vector)[i] = 1;

   return vector;
}
Ejemplo n.º 18
0
HYPRE_Int
hypre_SparseMSGInterp( void               *interp_vdata,
                       hypre_StructMatrix *P,
                       hypre_StructVector *xc,
                       hypre_StructVector *e            )
{
   HYPRE_Int ierr = 0;

   hypre_SparseMSGInterpData   *interp_data = interp_vdata;

   hypre_ComputePkg       *compute_pkg;
   hypre_IndexRef          cindex;
   hypre_IndexRef          findex;
   hypre_IndexRef          stride;
   hypre_IndexRef          strideP;

   hypre_StructGrid       *fgrid;
   HYPRE_Int              *fgrid_ids;
   hypre_StructGrid       *cgrid;
   hypre_BoxArray         *cgrid_boxes;
   HYPRE_Int              *cgrid_ids;

   hypre_CommHandle       *comm_handle;
                       
   hypre_BoxArrayArray    *compute_box_aa;
   hypre_BoxArray         *compute_box_a;
   hypre_Box              *compute_box;
                       
   hypre_Box              *P_dbox;
   hypre_Box              *xc_dbox;
   hypre_Box              *e_dbox;
                       
   HYPRE_Int               Pi;
   HYPRE_Int               xci;
   HYPRE_Int               ei;
                         
   double                 *Pp0, *Pp1;
   double                 *xcp;
   double                 *ep, *ep0, *ep1;
                       
   hypre_Index             loop_size;
   hypre_Index             start;
   hypre_Index             startc;
   hypre_Index             startP;
   hypre_Index             stridec;
                       
   hypre_StructStencil    *stencil;
   hypre_Index            *stencil_shape;

   HYPRE_Int               compute_i, fi, ci, j;
   HYPRE_Int               loopi, loopj, loopk;

   /*-----------------------------------------------------------------------
    * Initialize some things
    *-----------------------------------------------------------------------*/

   hypre_BeginTiming(interp_data -> time_index);

   compute_pkg   = (interp_data -> compute_pkg);
   cindex        = (interp_data -> cindex);
   findex        = (interp_data -> findex);
   stride        = (interp_data -> stride);
   strideP       = (interp_data -> strideP);

   stencil       = hypre_StructMatrixStencil(P);
   stencil_shape = hypre_StructStencilShape(stencil);

   hypre_SetIndex(stridec, 1, 1, 1);

   /*-----------------------------------------------------------------------
    * Compute e at coarse points (injection)
    *-----------------------------------------------------------------------*/

   fgrid = hypre_StructVectorGrid(e);
   fgrid_ids = hypre_StructGridIDs(fgrid);
   cgrid = hypre_StructVectorGrid(xc);
   cgrid_boxes = hypre_StructGridBoxes(cgrid);
   cgrid_ids = hypre_StructGridIDs(cgrid);

   fi = 0;
   hypre_ForBoxI(ci, cgrid_boxes)
      {
         while (fgrid_ids[fi] != cgrid_ids[ci])
         {
            fi++;
         }

         compute_box = hypre_BoxArrayBox(cgrid_boxes, ci);

         hypre_CopyIndex(hypre_BoxIMin(compute_box), startc);
         hypre_StructMapCoarseToFine(startc, cindex, stride, start);

         e_dbox  = hypre_BoxArrayBox(hypre_StructVectorDataSpace(e), fi);
         xc_dbox = hypre_BoxArrayBox(hypre_StructVectorDataSpace(xc), ci);

         ep  = hypre_StructVectorBoxData(e, fi);
         xcp = hypre_StructVectorBoxData(xc, ci);

         hypre_BoxGetSize(compute_box, loop_size);

         hypre_BoxLoop2Begin(loop_size,
                             e_dbox,  start,  stride,  ei,
                             xc_dbox, startc, stridec, xci);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,ei,xci
#include "hypre_box_smp_forloop.h"
         hypre_BoxLoop2For(loopi, loopj, loopk, ei, xci)
            {
               ep[ei] = xcp[xci];
            }
         hypre_BoxLoop2End(ei, xci);
      }

   /*-----------------------------------------------------------------------
    * Compute e at fine points
    *-----------------------------------------------------------------------*/

   for (compute_i = 0; compute_i < 2; compute_i++)
   {
      switch(compute_i)
      {
         case 0:
         {
            ep = hypre_StructVectorData(e);
            hypre_InitializeIndtComputations(compute_pkg, ep, &comm_handle);
            compute_box_aa = hypre_ComputePkgIndtBoxes(compute_pkg);
         }
         break;

         case 1:
         {
            hypre_FinalizeIndtComputations(comm_handle);
            compute_box_aa = hypre_ComputePkgDeptBoxes(compute_pkg);
         }
         break;
      }

      hypre_ForBoxArrayI(fi, compute_box_aa)
         {
            compute_box_a = hypre_BoxArrayArrayBoxArray(compute_box_aa, fi);

            P_dbox = hypre_BoxArrayBox(hypre_StructMatrixDataSpace(P), fi);
            e_dbox = hypre_BoxArrayBox(hypre_StructVectorDataSpace(e), fi);

            Pp0 = hypre_StructMatrixBoxData(P, fi, 0);
            Pp1 = hypre_StructMatrixBoxData(P, fi, 1);
            ep  = hypre_StructVectorBoxData(e, fi);
            ep0 = ep + hypre_BoxOffsetDistance(e_dbox, stencil_shape[0]);
            ep1 = ep + hypre_BoxOffsetDistance(e_dbox, stencil_shape[1]);

            hypre_ForBoxI(j, compute_box_a)
               {
                  compute_box = hypre_BoxArrayBox(compute_box_a, j);

                  hypre_CopyIndex(hypre_BoxIMin(compute_box), start);
                  hypre_StructMapFineToCoarse(start,  findex, stride,  startc);
                  hypre_StructMapCoarseToFine(startc, cindex, strideP, startP);

                  hypre_BoxGetStrideSize(compute_box, stride, loop_size);

                  hypre_BoxLoop2Begin(loop_size,
                                      P_dbox, startP, strideP, Pi,
                                      e_dbox, start,  stride,  ei);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,Pi,ei
#include "hypre_box_smp_forloop.h"
                  hypre_BoxLoop2For(loopi, loopj, loopk, Pi, ei)
                     {
                        ep[ei] =  (Pp0[Pi] * ep0[ei] +
                                   Pp1[Pi] * ep1[ei]);
                     }
                  hypre_BoxLoop2End(Pi, ei);
               }
         }
Ejemplo n.º 19
0
int
hypre_PointRelaxSetup( void               *relax_vdata,
                       hypre_StructMatrix *A,
                       hypre_StructVector *b,
                       hypre_StructVector *x           )
{
   hypre_PointRelaxData *relax_data = (hypre_PointRelaxData *)relax_vdata;

   int                    num_pointsets    = (relax_data -> num_pointsets);
   int                   *pointset_sizes   = (relax_data -> pointset_sizes);
   hypre_Index           *pointset_strides = (relax_data -> pointset_strides);
   hypre_Index          **pointset_indices = (relax_data -> pointset_indices);
   hypre_StructVector    *t;
   int                    diag_rank;
   hypre_ComputePkg     **compute_pkgs;

   hypre_Index            unit_stride;
   hypre_Index            diag_index;
   hypre_IndexRef         stride;
   hypre_IndexRef         index;
                       
   hypre_StructGrid      *grid;
   hypre_StructStencil   *stencil;
                       
   hypre_BoxArrayArray   *send_boxes;
   hypre_BoxArrayArray   *recv_boxes;
   int                  **send_processes;
   int                  **recv_processes;
   hypre_BoxArrayArray   *indt_boxes;
   hypre_BoxArrayArray   *dept_boxes;

   hypre_BoxArrayArray   *orig_indt_boxes;
   hypre_BoxArrayArray   *orig_dept_boxes;
   hypre_BoxArrayArray   *box_aa;
   hypre_BoxArray        *box_a;
   hypre_Box             *box;
   int                    box_aa_size;
   int                    box_a_size;
   hypre_BoxArrayArray   *new_box_aa;
   hypre_BoxArray        *new_box_a;
   hypre_Box             *new_box;

   double                 scale;
   int                    frac;

   int                    i, j, k, p, m, compute_i;
   int                    ierr = 0;
                       
   /*----------------------------------------------------------
    * Set up the temp vector
    *----------------------------------------------------------*/

   if ((relax_data -> t) == NULL)
   {
      t = hypre_StructVectorCreate(hypre_StructVectorComm(b),
                                   hypre_StructVectorGrid(b));
      hypre_StructVectorSetNumGhost(t, hypre_StructVectorNumGhost(b));
      hypre_StructVectorInitialize(t);
      hypre_StructVectorAssemble(t);
      (relax_data -> t) = t;
   }

   /*----------------------------------------------------------
    * Find the matrix diagonal
    *----------------------------------------------------------*/

   grid    = hypre_StructMatrixGrid(A);
   stencil = hypre_StructMatrixStencil(A);

   hypre_SetIndex(diag_index, 0, 0, 0);
   diag_rank = hypre_StructStencilElementRank(stencil, diag_index);

   /*----------------------------------------------------------
    * Set up the compute packages
    *----------------------------------------------------------*/

   hypre_SetIndex(unit_stride, 1, 1, 1);

   compute_pkgs = hypre_CTAlloc(hypre_ComputePkg *, num_pointsets);

   for (p = 0; p < num_pointsets; p++)
   {
      hypre_CreateComputeInfo(grid, stencil,
                           &send_boxes, &recv_boxes,
                           &send_processes, &recv_processes,
                           &orig_indt_boxes, &orig_dept_boxes);

      stride = pointset_strides[p];

      for (compute_i = 0; compute_i < 2; compute_i++)
      {
         switch(compute_i)
         {
            case 0:
            box_aa = orig_indt_boxes;
            break;

            case 1:
            box_aa = orig_dept_boxes;
            break;
         }
         box_aa_size = hypre_BoxArrayArraySize(box_aa);
         new_box_aa = hypre_BoxArrayArrayCreate(box_aa_size);

         for (i = 0; i < box_aa_size; i++)
         {
            box_a = hypre_BoxArrayArrayBoxArray(box_aa, i);
            box_a_size = hypre_BoxArraySize(box_a);
            new_box_a = hypre_BoxArrayArrayBoxArray(new_box_aa, i);
            hypre_BoxArraySetSize(new_box_a, box_a_size * pointset_sizes[p]);

            k = 0;
            for (m = 0; m < pointset_sizes[p]; m++)
            {
               index  = pointset_indices[p][m];

               for (j = 0; j < box_a_size; j++)
               {
                  box = hypre_BoxArrayBox(box_a, j);
                  new_box = hypre_BoxArrayBox(new_box_a, k);
                  
                  hypre_CopyBox(box, new_box);
                  hypre_ProjectBox(new_box, index, stride);
                  
                  k++;
               }
            }
         }

         switch(compute_i)
         {
            case 0:
            indt_boxes = new_box_aa;
            break;

            case 1:
            dept_boxes = new_box_aa;
            break;
         }
      }

      hypre_ComputePkgCreate(send_boxes, recv_boxes,
                             unit_stride, unit_stride,
                             send_processes, recv_processes,
                             indt_boxes, dept_boxes,
                             stride, grid,
                             hypre_StructVectorDataSpace(x), 1,
                             &compute_pkgs[p]);

      hypre_BoxArrayArrayDestroy(orig_indt_boxes);
      hypre_BoxArrayArrayDestroy(orig_dept_boxes);
   }

   /*----------------------------------------------------------
    * Set up the relax data structure
    *----------------------------------------------------------*/

   (relax_data -> A) = hypre_StructMatrixRef(A);
   (relax_data -> x) = hypre_StructVectorRef(x);
   (relax_data -> b) = hypre_StructVectorRef(b);
   (relax_data -> diag_rank)    = diag_rank;
   (relax_data -> compute_pkgs) = compute_pkgs;

   /*-----------------------------------------------------
    * Compute flops
    *-----------------------------------------------------*/

   scale = 0.0;
   for (p = 0; p < num_pointsets; p++)
   {
      stride = pointset_strides[p];
      frac   = hypre_IndexX(stride);
      frac  *= hypre_IndexY(stride);
      frac  *= hypre_IndexZ(stride);
      scale += (pointset_sizes[p] / frac);
   }
   (relax_data -> flops) = scale * (hypre_StructMatrixGlobalSize(A) +
                                    hypre_StructVectorGlobalSize(x));

   return ierr;
}
Ejemplo n.º 20
0
int
hypre_SemiRestrictSetup( void               *restrict_vdata,
                         hypre_StructMatrix *R,
                         int                 R_stored_as_transpose,
                         hypre_StructVector *r,
                         hypre_StructVector *rc,
                         hypre_Index         cindex,
                         hypre_Index         findex,
                         hypre_Index         stride                )
{
   hypre_SemiRestrictData *restrict_data = (hypre_SemiRestrictData *)restrict_vdata;

   hypre_StructGrid       *grid;
   hypre_StructStencil    *stencil;

   hypre_BoxArrayArray    *send_boxes;
   hypre_BoxArrayArray    *recv_boxes;
   int                   **send_processes;
   int                   **recv_processes;
   hypre_BoxArrayArray    *indt_boxes;
   hypre_BoxArrayArray    *dept_boxes;

   hypre_ComputePkg       *compute_pkg;

   int                     ierr = 0;

   /*----------------------------------------------------------
    * Set up the compute package
    *----------------------------------------------------------*/

   grid    = hypre_StructVectorGrid(r);
   stencil = hypre_StructMatrixStencil(R);

   hypre_CreateComputeInfo(grid, stencil,
                        &send_boxes, &recv_boxes,
                        &send_processes, &recv_processes,
                        &indt_boxes, &dept_boxes);

   hypre_ProjectBoxArrayArray(send_boxes, findex, stride);
   hypre_ProjectBoxArrayArray(recv_boxes, findex, stride);
   hypre_ProjectBoxArrayArray(indt_boxes, cindex, stride);
   hypre_ProjectBoxArrayArray(dept_boxes, cindex, stride);

   hypre_ComputePkgCreate(send_boxes, recv_boxes,
                          stride, stride,
                          send_processes, recv_processes,
                          indt_boxes, dept_boxes,
                          stride, grid,
                          hypre_StructVectorDataSpace(r), 1,
                          &compute_pkg);

   /*----------------------------------------------------------
    * Set up the restrict data structure
    *----------------------------------------------------------*/

   (restrict_data -> R) = hypre_StructMatrixRef(R);
   (restrict_data -> R_stored_as_transpose) = R_stored_as_transpose;
   (restrict_data -> compute_pkg) = compute_pkg;
   hypre_CopyIndex(cindex ,(restrict_data -> cindex));
   hypre_CopyIndex(stride ,(restrict_data -> stride));

   return ierr;
}
Ejemplo n.º 21
0
int
hypre_SemiRestrict( void               *restrict_vdata,
                    hypre_StructMatrix *R,
                    hypre_StructVector *r,
                    hypre_StructVector *rc             )
{
   int ierr = 0;

   hypre_SemiRestrictData *restrict_data = (hypre_SemiRestrictData *)restrict_vdata;

   int                     R_stored_as_transpose;
   hypre_ComputePkg       *compute_pkg;
   hypre_IndexRef          cindex;
   hypre_IndexRef          stride;

   hypre_StructGrid       *fgrid;
   int                    *fgrid_ids;
   hypre_StructGrid       *cgrid;
   hypre_BoxArray         *cgrid_boxes;
   int                    *cgrid_ids;

   hypre_CommHandle       *comm_handle;
                       
   hypre_BoxArrayArray    *compute_box_aa;
   hypre_BoxArray         *compute_box_a;
   hypre_Box              *compute_box;
                       
   hypre_Box              *R_dbox;
   hypre_Box              *r_dbox;
   hypre_Box              *rc_dbox;
                       
   int                     Ri;
   int                     ri;
   int                     rci;
                         
   double                 *Rp0, *Rp1;
   double                 *rp, *rp0, *rp1;
   double                 *rcp;
                       
   hypre_Index             loop_size;
   hypre_IndexRef          start;
   hypre_Index             startc;
   hypre_Index             stridec;
                       
   hypre_StructStencil    *stencil;
   hypre_Index            *stencil_shape;

   int                     compute_i, fi, ci, j;
   int                     loopi, loopj, loopk;

   /*-----------------------------------------------------------------------
    * Initialize some things.
    *-----------------------------------------------------------------------*/

   hypre_BeginTiming(restrict_data -> time_index);

   R_stored_as_transpose = (restrict_data -> R_stored_as_transpose);
   compute_pkg   = (restrict_data -> compute_pkg);
   cindex        = (restrict_data -> cindex);
   stride        = (restrict_data -> stride);

   stencil       = hypre_StructMatrixStencil(R);
   stencil_shape = hypre_StructStencilShape(stencil);

   hypre_SetIndex(stridec, 1, 1, 1);

   /*--------------------------------------------------------------------
    * Restrict the residual.
    *--------------------------------------------------------------------*/

   fgrid = hypre_StructVectorGrid(r);
   fgrid_ids = hypre_StructGridIDs(fgrid);
   cgrid = hypre_StructVectorGrid(rc);
   cgrid_boxes = hypre_StructGridBoxes(cgrid);
   cgrid_ids = hypre_StructGridIDs(cgrid);

   for (compute_i = 0; compute_i < 2; compute_i++)
   {
      switch(compute_i)
      {
         case 0:
         {
            rp = hypre_StructVectorData(r);
            hypre_InitializeIndtComputations(compute_pkg, rp, &comm_handle);
            compute_box_aa = hypre_ComputePkgIndtBoxes(compute_pkg);
         }
         break;

         case 1:
         {
            hypre_FinalizeIndtComputations(comm_handle);
            compute_box_aa = hypre_ComputePkgDeptBoxes(compute_pkg);
         }
         break;
      }

      fi = 0;
      hypre_ForBoxArrayI(ci, cgrid_boxes)
         {
            while (fgrid_ids[fi] != cgrid_ids[ci])
            {
               fi++;
            }

            compute_box_a = hypre_BoxArrayArrayBoxArray(compute_box_aa, fi);

            R_dbox  = hypre_BoxArrayBox(hypre_StructMatrixDataSpace(R),  fi);
            r_dbox  = hypre_BoxArrayBox(hypre_StructVectorDataSpace(r),  fi);
            rc_dbox = hypre_BoxArrayBox(hypre_StructVectorDataSpace(rc), ci);

            if (R_stored_as_transpose)
            {
               Rp0 = hypre_StructMatrixBoxData(R, fi, 1) -
                  hypre_BoxOffsetDistance(R_dbox, stencil_shape[1]);
               Rp1 = hypre_StructMatrixBoxData(R, fi, 0);
            }
            else
            {
               Rp0 = hypre_StructMatrixBoxData(R, fi, 0);
               Rp1 = hypre_StructMatrixBoxData(R, fi, 1);
            }
            rp  = hypre_StructVectorBoxData(r, fi);
            rp0 = rp + hypre_BoxOffsetDistance(r_dbox, stencil_shape[0]);
            rp1 = rp + hypre_BoxOffsetDistance(r_dbox, stencil_shape[1]);
            rcp = hypre_StructVectorBoxData(rc, ci);

            hypre_ForBoxI(j, compute_box_a)
               {
                  compute_box = hypre_BoxArrayBox(compute_box_a, j);

                  start  = hypre_BoxIMin(compute_box);
                  hypre_StructMapFineToCoarse(start, cindex, stride, startc);

                  hypre_BoxGetStrideSize(compute_box, stride, loop_size);
                  hypre_BoxLoop3Begin(loop_size,
                                      R_dbox,  startc, stridec, Ri,
                                      r_dbox,  start,  stride,  ri,
                                      rc_dbox, startc, stridec, rci);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,Ri,ri,rci
#include "hypre_box_smp_forloop.h"
                  hypre_BoxLoop3For(loopi, loopj, loopk, Ri, ri, rci)
                     {
                        rcp[rci] = rp[ri] + (Rp0[Ri] * rp0[ri] +
                                             Rp1[Ri] * rp1[ri]);
                     }
                  hypre_BoxLoop3End(Ri, ri, rci);
               }
         }
Ejemplo n.º 22
0
int
hypre_SemiInterpSetup( void               *interp_vdata,
                       hypre_StructMatrix *P,
                       int                 P_stored_as_transpose,
                       hypre_StructVector *xc,
                       hypre_StructVector *e,
                       hypre_Index         cindex,
                       hypre_Index         findex,
                       hypre_Index         stride       )
{
   hypre_SemiInterpData   *interp_data = interp_vdata;

   hypre_StructGrid       *grid;
   hypre_StructStencil    *stencil;
                       
   hypre_BoxArrayArray    *send_boxes;
   hypre_BoxArrayArray    *recv_boxes;
   int                   **send_processes;
   int                   **recv_processes;
   hypre_BoxArrayArray    *indt_boxes;
   hypre_BoxArrayArray    *dept_boxes;
                       
   hypre_ComputePkg       *compute_pkg;

   int                     ierr = 0;

   /*----------------------------------------------------------
    * Set up the compute package
    *----------------------------------------------------------*/

   grid    = hypre_StructVectorGrid(e);
   stencil = hypre_StructMatrixStencil(P);

   hypre_CreateComputeInfo(grid, stencil,
                        &send_boxes, &recv_boxes,
                        &send_processes, &recv_processes,
                        &indt_boxes, &dept_boxes);

   hypre_ProjectBoxArrayArray(send_boxes, cindex, stride);
   hypre_ProjectBoxArrayArray(recv_boxes, cindex, stride);
   hypre_ProjectBoxArrayArray(indt_boxes, findex, stride);
   hypre_ProjectBoxArrayArray(dept_boxes, findex, stride);

   hypre_ComputePkgCreate(send_boxes, recv_boxes,
                       stride, stride,
                       send_processes, recv_processes,
                       indt_boxes, dept_boxes,
                       stride, grid,
                       hypre_StructVectorDataSpace(e), 1,
                       &compute_pkg);

   /*----------------------------------------------------------
    * Set up the interp data structure
    *----------------------------------------------------------*/

   (interp_data -> P) = hypre_StructMatrixRef(P);
   (interp_data -> P_stored_as_transpose) = P_stored_as_transpose;
   (interp_data -> compute_pkg) = compute_pkg;
   hypre_CopyIndex(cindex, (interp_data -> cindex));
   hypre_CopyIndex(findex, (interp_data -> findex));
   hypre_CopyIndex(stride, (interp_data -> stride));

   return ierr;
}
Ejemplo n.º 23
0
HYPRE_Int
hypre_SemiInterp( void               *interp_vdata,
                  hypre_StructMatrix *P,
                  hypre_StructVector *xc,
                  hypre_StructVector *e            )
{
   hypre_SemiInterpData   *interp_data = interp_vdata;

   HYPRE_Int               P_stored_as_transpose;
   hypre_ComputePkg       *compute_pkg;
   hypre_IndexRef          cindex;
   hypre_IndexRef          findex;
   hypre_IndexRef          stride;

   hypre_StructGrid       *fgrid;
   HYPRE_Int              *fgrid_ids;
   hypre_StructGrid       *cgrid;
   hypre_BoxArray         *cgrid_boxes;
   HYPRE_Int              *cgrid_ids;

   hypre_CommHandle       *comm_handle;
                       
   hypre_BoxArrayArray    *compute_box_aa;
   hypre_BoxArray         *compute_box_a;
   hypre_Box              *compute_box;
                       
   hypre_Box              *P_dbox;
   hypre_Box              *xc_dbox;
   hypre_Box              *e_dbox;
                       
   HYPRE_Int               Pi;
   HYPRE_Int               xci;
   HYPRE_Int               ei;
   HYPRE_Int               constant_coefficient;
                         
   HYPRE_Real             *Pp0, *Pp1;
   HYPRE_Real             *xcp;
   HYPRE_Real             *ep, *ep0, *ep1;
                       
   hypre_Index             loop_size;
   hypre_Index             start;
   hypre_Index             startc;
   hypre_Index             stridec;
                       
   hypre_StructStencil    *stencil;
   hypre_Index            *stencil_shape;

   HYPRE_Int               compute_i, fi, ci, j;

   /*-----------------------------------------------------------------------
    * Initialize some things
    *-----------------------------------------------------------------------*/

   hypre_BeginTiming(interp_data -> time_index);

   P_stored_as_transpose = (interp_data -> P_stored_as_transpose);
   compute_pkg   = (interp_data -> compute_pkg);
   cindex        = (interp_data -> cindex);
   findex        = (interp_data -> findex);
   stride        = (interp_data -> stride);

   stencil       = hypre_StructMatrixStencil(P);
   stencil_shape = hypre_StructStencilShape(stencil);
   constant_coefficient = hypre_StructMatrixConstantCoefficient(P);
   hypre_assert( constant_coefficient==0 || constant_coefficient==1 );
   /* ... constant_coefficient==2 for P shouldn't happen, see
      hypre_PFMGCreateInterpOp in pfmg_setup_interp.c */

   if (constant_coefficient) hypre_StructVectorClearBoundGhostValues(e, 0);

   hypre_SetIndex3(stridec, 1, 1, 1);

   /*-----------------------------------------------------------------------
    * Compute e at coarse points (injection)
    *-----------------------------------------------------------------------*/

   fgrid = hypre_StructVectorGrid(e);
   fgrid_ids = hypre_StructGridIDs(fgrid);
   cgrid = hypre_StructVectorGrid(xc);
   cgrid_boxes = hypre_StructGridBoxes(cgrid);
   cgrid_ids = hypre_StructGridIDs(cgrid);

   fi = 0;
   hypre_ForBoxI(ci, cgrid_boxes)
   {
      while (fgrid_ids[fi] != cgrid_ids[ci])
      {
         fi++;
      }

      compute_box = hypre_BoxArrayBox(cgrid_boxes, ci);

      hypre_CopyIndex(hypre_BoxIMin(compute_box), startc);
      hypre_StructMapCoarseToFine(startc, cindex, stride, start);

      e_dbox  = hypre_BoxArrayBox(hypre_StructVectorDataSpace(e), fi);
      xc_dbox = hypre_BoxArrayBox(hypre_StructVectorDataSpace(xc), ci);

      ep  = hypre_StructVectorBoxData(e, fi);
      xcp = hypre_StructVectorBoxData(xc, ci);

      hypre_BoxGetSize(compute_box, loop_size);

      hypre_BoxLoop2Begin(hypre_StructMatrixNDim(P), loop_size,
                          e_dbox, start, stride, ei,
                          xc_dbox, startc, stridec, xci);
#ifdef HYPRE_USING_OPENMP
#pragma omp parallel for private(HYPRE_BOX_PRIVATE,ei,xci) HYPRE_SMP_SCHEDULE
#endif
      hypre_BoxLoop2For(ei, xci)
      {
         ep[ei] = xcp[xci];
      }
      hypre_BoxLoop2End(ei, xci);
   }

   /*-----------------------------------------------------------------------
    * Compute e at fine points
    *-----------------------------------------------------------------------*/

   for (compute_i = 0; compute_i < 2; compute_i++)
   {
      switch(compute_i)
      {
         case 0:
         {
            ep = hypre_StructVectorData(e);
            hypre_InitializeIndtComputations(compute_pkg, ep, &comm_handle);
            compute_box_aa = hypre_ComputePkgIndtBoxes(compute_pkg);
         }
         break;

         case 1:
         {
            hypre_FinalizeIndtComputations(comm_handle);
            compute_box_aa = hypre_ComputePkgDeptBoxes(compute_pkg);
         }
         break;
      }

      hypre_ForBoxArrayI(fi, compute_box_aa)
      {
         compute_box_a = hypre_BoxArrayArrayBoxArray(compute_box_aa, fi);

         P_dbox = hypre_BoxArrayBox(hypre_StructMatrixDataSpace(P), fi);
         e_dbox = hypre_BoxArrayBox(hypre_StructVectorDataSpace(e), fi);

         if (P_stored_as_transpose)
         {
            if ( constant_coefficient )
            {
               Pp0 = hypre_StructMatrixBoxData(P, fi, 1);
               Pp1 = hypre_StructMatrixBoxData(P, fi, 0) -
                  hypre_CCBoxOffsetDistance(P_dbox, stencil_shape[0]);
            }
            else
            {
               Pp0 = hypre_StructMatrixBoxData(P, fi, 1);
               Pp1 = hypre_StructMatrixBoxData(P, fi, 0) -
                  hypre_BoxOffsetDistance(P_dbox, stencil_shape[0]);
            }
         }
         else
         {
            Pp0 = hypre_StructMatrixBoxData(P, fi, 0);
            Pp1 = hypre_StructMatrixBoxData(P, fi, 1);
         }
         ep  = hypre_StructVectorBoxData(e, fi);
         ep0 = ep + hypre_BoxOffsetDistance(e_dbox, stencil_shape[0]);
         ep1 = ep + hypre_BoxOffsetDistance(e_dbox, stencil_shape[1]);

         hypre_ForBoxI(j, compute_box_a)
         {
            compute_box = hypre_BoxArrayBox(compute_box_a, j);

            hypre_CopyIndex(hypre_BoxIMin(compute_box), start);
            hypre_StructMapFineToCoarse(start, findex, stride, startc);

            hypre_BoxGetStrideSize(compute_box, stride, loop_size);

            if ( constant_coefficient )
            {
               Pi = hypre_CCBoxIndexRank( P_dbox, startc );
               hypre_BoxLoop1Begin(hypre_StructMatrixNDim(P), loop_size,
                                   e_dbox, start, stride, ei);
#ifdef HYPRE_USING_OPENMP
#pragma omp parallel for private(HYPRE_BOX_PRIVATE,ei) HYPRE_SMP_SCHEDULE
#endif
               hypre_BoxLoop1For(ei)
               {
                  ep[ei] =  (Pp0[Pi] * ep0[ei] +
                             Pp1[Pi] * ep1[ei]);
               }
               hypre_BoxLoop1End(ei);
            }
            else
            {
               hypre_BoxLoop2Begin(hypre_StructMatrixNDim(P), loop_size,
                                   P_dbox, startc, stridec, Pi,
                                   e_dbox, start, stride, ei);
#ifdef HYPRE_USING_OPENMP
#pragma omp parallel for private(HYPRE_BOX_PRIVATE,Pi,ei) HYPRE_SMP_SCHEDULE
#endif
               hypre_BoxLoop2For(Pi, ei)
               {
                  ep[ei] =  (Pp0[Pi] * ep0[ei] +
                             Pp1[Pi] * ep1[ei]);
               }
               hypre_BoxLoop2End(Pi, ei);
            }
         }
Ejemplo n.º 24
0
double
hypre_StructOverlapInnerProd( hypre_StructVector *x,
                              hypre_StructVector *y )
{
   double               final_innerprod_result;
   double               local_result, overlap_result;
   double               process_result;
                   
   hypre_Box           *x_data_box;
   hypre_Box           *y_data_box;

   hypre_BoxArray      *overlap_boxes;
                   
   HYPRE_Int            xi;
   HYPRE_Int            yi;
                   
   double              *xp;
   double              *yp;
                   
   hypre_BoxArray      *boxes;
   hypre_Box           *boxi, *boxj, intersect_box;

   hypre_StructGrid    *grid= hypre_StructVectorGrid(y);
   hypre_BoxManager    *boxman = hypre_StructGridBoxMan(grid);
   hypre_BoxArray      *neighbor_boxes;
   HYPRE_Int           *neighbors_procs= NULL;
   hypre_BoxArray      *selected_nboxes;
   hypre_BoxArray      *tmp_box_array, *tmp2_box_array;

   hypre_Index          loop_size;
   hypre_IndexRef       start;
   hypre_Index          unit_stride;
                   
   HYPRE_Int            i, j;
   HYPRE_Int            myid;
   HYPRE_Int            boxarray_size;
   HYPRE_Int            loopi, loopj, loopk;
#ifdef HYPRE_USE_PTHREADS
   HYPRE_Int            threadid = hypre_GetThreadID();
#endif

   
   local_result = 0.0;
   process_result = 0.0;
   hypre_SetIndex(unit_stride, 1, 1, 1);

   hypre_MPI_Comm_rank(hypre_StructVectorComm(y), &myid);

   /*-----------------------------------------------------------------------
    * Determine the overlapped boxes on this local processor.
    *-----------------------------------------------------------------------*/
   boxes        = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
   boxarray_size= hypre_BoxArraySize(boxes);

   /*-----------------------------------------------------------------------
    * To compute the inner product over this local processor, given a box, 
    * the inner product between x & y is computed over the whole box and
    * over any overlapping between this box and overlap_boxes. The latter
    * result is subtracted from the former. Overlapping between more than
    * two boxes are handled.
    *-----------------------------------------------------------------------*/
   hypre_ForBoxI(i, boxes)
   {
      boxi  = hypre_BoxArrayBox(boxes, i);
      start = hypre_BoxIMin(boxi);

      x_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(x), i);
      y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);

      xp = hypre_StructVectorBoxData(x, i);
      yp = hypre_StructVectorBoxData(y, i);

      hypre_BoxGetSize(boxi, loop_size);

#ifdef HYPRE_USE_PTHREADS
   local_result_ref[threadid] = &local_result;
#endif

      hypre_BoxLoop2Begin(loop_size,
                          x_data_box, start, unit_stride, xi,
                          y_data_box, start, unit_stride, yi);
#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,xi,yi
#define HYPRE_SMP_REDUCTION_OP +
#define HYPRE_SMP_REDUCTION_VARS local_result
#include "hypre_box_smp_forloop.h"
      hypre_BoxLoop2For(loopi, loopj, loopk, xi, yi)
      {
          local_result += xp[xi] * yp[yi];
      }