d9fcb77306
dimension data (see [issue[926]). Also added initial implementations of the new loops and named them with the prefix 'zypre_'. These new loops will be optimized further before swapping them in permanently.
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*BHEADER**********************************************************************
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* Copyright (c) 2008, Lawrence Livermore National Security, LLC.
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* Produced at the Lawrence Livermore National Laboratory.
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* This file is part of HYPRE. See file COPYRIGHT for details.
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*
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* HYPRE is free software; you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License (as published by the Free
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* Software Foundation) version 2.1 dated February 1999.
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*
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* $Revision$
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***********************************************************************EHEADER*/
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/******************************************************************************
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*
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* Structured axpy routine
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*
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*****************************************************************************/
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#include "_hypre_struct_mv.h"
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/*--------------------------------------------------------------------------
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* hypre_StructAxpy
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*--------------------------------------------------------------------------*/
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HYPRE_Int
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hypre_StructAxpy( double alpha,
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hypre_StructVector *x,
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hypre_StructVector *y )
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{
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hypre_Box *x_data_box;
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hypre_Box *y_data_box;
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HYPRE_Int xi;
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HYPRE_Int yi;
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double *xp;
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double *yp;
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hypre_BoxArray *boxes;
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hypre_Box *box;
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hypre_Index loop_size;
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hypre_IndexRef start;
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hypre_Index unit_stride;
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HYPRE_Int i;
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hypre_SetIndex(unit_stride, 1, 1, 1);
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boxes = hypre_StructGridBoxes(hypre_StructVectorGrid(y));
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hypre_ForBoxI(i, boxes)
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{
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box = hypre_BoxArrayBox(boxes, i);
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start = hypre_BoxIMin(box);
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x_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(x), i);
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y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);
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xp = hypre_StructVectorBoxData(x, i);
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yp = hypre_StructVectorBoxData(y, i);
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hypre_BoxGetSize(box, loop_size);
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hypre_BoxLoop2Begin(hypre_StructVectorDim(x), loop_size,
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x_data_box, start, unit_stride, xi,
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y_data_box, start, unit_stride, yi);
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#ifdef HYPRE_USING_OPENMP
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#pragma omp parallel for private(HYPRE_BOX_PRIVATE,xi,yi) HYPRE_SMP_SCHEDULE
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#endif
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hypre_BoxLoop2For(xi, yi)
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{
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yp[yi] += alpha * xp[xi];
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}
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hypre_BoxLoop2End(xi, yi);
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}
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return hypre_error_flag;
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}
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