libgfortran/generated/transpose_r8.c

   1 /* Implementation of the TRANSPOSE intrinsic
   2    Copyright 2003, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
   3    Contributed by Tobias Schlüter
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27 #include <assert.h>
  28
  29
  30 #if defined (HAVE_GFC_REAL_8)
  31
  32 extern void transpose_r8 (gfc_array_r8 * const restrict ret,
  33         gfc_array_r8 * const restrict source);
  34 export_proto(transpose_r8);
  35
  36 void
  37 transpose_r8 (gfc_array_r8 * const restrict ret,
  38         gfc_array_r8 * const restrict source)
  39 {
  40   /* r.* indicates the return array.  */
  41   index_type rxstride, rystride;
  42   GFC_REAL_8 * restrict rptr;
  43   /* s.* indicates the source array.  */
  44   index_type sxstride, systride;
  45   const GFC_REAL_8 *sptr;
  46
  47   index_type xcount, ycount;
  48   index_type x, y;
  49
  50   assert (GFC_DESCRIPTOR_RANK (source) == 2);
  51
  52   if (ret->data == NULL)
  53     {
  54       assert (GFC_DESCRIPTOR_RANK (ret) == 2);
  55       assert (ret->dtype == source->dtype);
  56
  57       GFC_DIMENSION_SET(ret->dim[0], 0, GFC_DESCRIPTOR_EXTENT(source,1) - 1,
  58                         1);
  59
  60       GFC_DIMENSION_SET(ret->dim[1], 0, GFC_DESCRIPTOR_EXTENT(source,0) - 1,
  61                         GFC_DESCRIPTOR_EXTENT(source, 1));
  62
  63       ret->data = internal_malloc_size (sizeof (GFC_REAL_8) * size0 ((array_t *) ret));
  64       ret->offset = 0;
  65     } else if (unlikely (compile_options.bounds_check))
  66     {
  67       index_type ret_extent, src_extent;
  68
  69       ret_extent = GFC_DESCRIPTOR_EXTENT(ret,0);
  70       src_extent = GFC_DESCRIPTOR_EXTENT(source,1);
  71
  72       if (src_extent != ret_extent)
  73         runtime_error ("Incorrect extent in return value of TRANSPOSE"
  74                        " intrinsic in dimension 1: is %ld,"
  75                        " should be %ld", (long int) src_extent,
  76                        (long int) ret_extent);
  77
  78       ret_extent = GFC_DESCRIPTOR_EXTENT(ret,1);
  79       src_extent = GFC_DESCRIPTOR_EXTENT(source,0);
  80
  81       if (src_extent != ret_extent)
  82         runtime_error ("Incorrect extent in return value of TRANSPOSE"
  83                        " intrinsic in dimension 2: is %ld,"
  84                        " should be %ld", (long int) src_extent,
  85                        (long int) ret_extent);
  86
  87     }
  88
  89   sxstride = GFC_DESCRIPTOR_STRIDE(source,0);
  90   systride = GFC_DESCRIPTOR_STRIDE(source,1);
  91   xcount = GFC_DESCRIPTOR_EXTENT(source,0);
  92   ycount = GFC_DESCRIPTOR_EXTENT(source,1);
  93
  94   rxstride = GFC_DESCRIPTOR_STRIDE(ret,0);
  95   rystride = GFC_DESCRIPTOR_STRIDE(ret,1);
  96
  97   rptr = ret->data;
  98   sptr = source->data;
  99
 100   for (y=0; y < ycount; y++)
 101     {
 102       for (x=0; x < xcount; x++)
 103         {
 104           *rptr = *sptr;
 105
 106           sptr += sxstride;
 107           rptr += rystride;
 108         }
 109         sptr += systride - (sxstride * xcount);
 110         rptr += rxstride - (rystride * xcount);
 111     }
 112 }
 113
 114 #endif