| /*BHEADER********************************************************************** |
| * (c) 1997 The Regents of the University of California |
| * |
| * See the file COPYRIGHT_and_DISCLAIMER for a complete copyright |
| * notice, contact person, and disclaimer. |
| * |
| * $Revision$ |
| *********************************************************************EHEADER*/ |
| /****************************************************************************** |
| * |
| * Structured axpy routine |
| * |
| *****************************************************************************/ |
| |
| #include "headers.h" |
| |
| /*-------------------------------------------------------------------------- |
| * hypre_StructAxpy |
| *--------------------------------------------------------------------------*/ |
| |
| int |
| hypre_StructAxpy( double alpha, |
| 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] += alpha * xp[xi]; |
| } |
| hypre_BoxLoop2End(xi, yi); |
| } |
| |
| return ierr; |
| } |