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115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
/* Implementation of the TRANSPOSE intrinsic
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Copyright (C) 2003-2013 Free Software Foundation, Inc.
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Contributed by Tobias Schlüter
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This file is part of the GNU Fortran runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include "libgfortran.h"
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#include <assert.h>
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#if defined (HAVE_GFC_REAL_8)
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extern void transpose_r8 (gfc_array_r8 * const restrict ret,
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gfc_array_r8 * const restrict source);
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export_proto(transpose_r8);
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void
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transpose_r8 (gfc_array_r8 * const restrict ret,
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gfc_array_r8 * const restrict source)
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{
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/* r.* indicates the return array. */
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index_type rxstride, rystride;
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GFC_REAL_8 * restrict rptr;
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/* s.* indicates the source array. */
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index_type sxstride, systride;
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const GFC_REAL_8 *sptr;
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index_type xcount, ycount;
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index_type x, y;
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assert (GFC_DESCRIPTOR_RANK (source) == 2);
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if (ret->base_addr == NULL)
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{
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assert (GFC_DESCRIPTOR_RANK (ret) == 2);
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assert (ret->dtype == source->dtype);
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GFC_DIMENSION_SET(ret->dim[0], 0, GFC_DESCRIPTOR_EXTENT(source,1) - 1,
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1);
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GFC_DIMENSION_SET(ret->dim[1], 0, GFC_DESCRIPTOR_EXTENT(source,0) - 1,
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GFC_DESCRIPTOR_EXTENT(source, 1));
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ret->base_addr = xmalloc (sizeof (GFC_REAL_8) * size0 ((array_t *) ret));
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ret->offset = 0;
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} else if (unlikely (compile_options.bounds_check))
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{
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index_type ret_extent, src_extent;
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ret_extent = GFC_DESCRIPTOR_EXTENT(ret,0);
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src_extent = GFC_DESCRIPTOR_EXTENT(source,1);
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if (src_extent != ret_extent)
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runtime_error ("Incorrect extent in return value of TRANSPOSE"
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" intrinsic in dimension 1: is %ld,"
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" should be %ld", (long int) src_extent,
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(long int) ret_extent);
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ret_extent = GFC_DESCRIPTOR_EXTENT(ret,1);
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src_extent = GFC_DESCRIPTOR_EXTENT(source,0);
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if (src_extent != ret_extent)
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runtime_error ("Incorrect extent in return value of TRANSPOSE"
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" intrinsic in dimension 2: is %ld,"
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" should be %ld", (long int) src_extent,
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(long int) ret_extent);
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}
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sxstride = GFC_DESCRIPTOR_STRIDE(source,0);
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systride = GFC_DESCRIPTOR_STRIDE(source,1);
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xcount = GFC_DESCRIPTOR_EXTENT(source,0);
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ycount = GFC_DESCRIPTOR_EXTENT(source,1);
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rxstride = GFC_DESCRIPTOR_STRIDE(ret,0);
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rystride = GFC_DESCRIPTOR_STRIDE(ret,1);
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rptr = ret->base_addr;
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sptr = source->base_addr;
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for (y=0; y < ycount; y++)
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{
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for (x=0; x < xcount; x++)
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{
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*rptr = *sptr;
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sptr += sxstride;
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rptr += rystride;
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}
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sptr += systride - (sxstride * xcount);
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rptr += rxstride - (rystride * xcount);
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}
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}
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#endif
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