87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*BHEADER**********************************************************************
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* Copyright (c) 2007, Lawrence Livermore National Security, LLC.
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* Produced at the Lawrence Livermore National Laboratory.
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* Written by the HYPRE team. UCRL-CODE-222953.
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* All rights reserved.
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*
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* This file is part of HYPRE (see http://www.llnl.gov/CASC/hypre/).
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* Please see the COPYRIGHT_and_LICENSE file for the copyright notice,
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* disclaimer, contact information and the GNU Lesser General Public License.
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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 General Public License (as published by the Free Software
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* Foundation) version 2.1 dated February 1999.
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*
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* HYPRE is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the IMPLIED WARRANTY OF MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the terms and conditions of the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 scale routine
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*
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*****************************************************************************/
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#include "headers.h"
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/*--------------------------------------------------------------------------
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* hypre_StructScale
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*--------------------------------------------------------------------------*/
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int
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hypre_StructScale( double alpha,
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hypre_StructVector *y )
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{
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int ierr = 0;
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hypre_Box *y_data_box;
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int yi;
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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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int i;
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int loopi, loopj, loopk;
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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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y_data_box = hypre_BoxArrayBox(hypre_StructVectorDataSpace(y), i);
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yp = hypre_StructVectorBoxData(y, i);
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hypre_BoxGetSize(box, loop_size);
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hypre_BoxLoop1Begin(loop_size,
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y_data_box, start, unit_stride, yi);
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#define HYPRE_BOX_SMP_PRIVATE loopk,loopi,loopj,yi
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#include "hypre_box_smp_forloop.h"
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hypre_BoxLoop1For(loopi, loopj, loopk, yi)
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{
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yp[yi] *= alpha;
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}
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hypre_BoxLoop1End(yi);
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}
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return ierr;
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}
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