libgfortran/generated/cshift1_4.c

   1 /* Implementation of the CSHIFT intrinsic
   2    Copyright (C) 2003-2017 Free Software Foundation, Inc.
   3    Contributed by Feng Wang <wf_cs@yahoo.com>
   4
   5 This file is part of the GNU Fortran 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 Ligbfortran 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 <string.h>
  28
  29
  30 #if defined (HAVE_GFC_INTEGER_4)
  31
  32 static void
  33 cshift1 (gfc_array_char * const restrict ret,
  34         const gfc_array_char * const restrict array,
  35         const gfc_array_i4 * const restrict h,
  36         const GFC_INTEGER_4 * const restrict pwhich)
  37 {
  38   /* r.* indicates the return array.  */
  39   index_type rstride[GFC_MAX_DIMENSIONS];
  40   index_type rstride0;
  41   index_type roffset;
  42   char *rptr;
  43   char *dest;
  44   /* s.* indicates the source array.  */
  45   index_type sstride[GFC_MAX_DIMENSIONS];
  46   index_type sstride0;
  47   index_type soffset;
  48   const char *sptr;
  49   const char *src;
  50   /* h.* indicates the shift array.  */
  51   index_type hstride[GFC_MAX_DIMENSIONS];
  52   index_type hstride0;
  53   const GFC_INTEGER_4 *hptr;
  54
  55   index_type count[GFC_MAX_DIMENSIONS];
  56   index_type extent[GFC_MAX_DIMENSIONS];
  57   index_type dim;
  58   index_type len;
  59   index_type n;
  60   int which;
  61   GFC_INTEGER_4 sh;
  62   index_type arraysize;
  63   index_type size;
  64   index_type type_size;
  65
  66   if (pwhich)
  67     which = *pwhich - 1;
  68   else
  69     which = 0;
  70
  71   if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
  72     runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
  73
  74   size = GFC_DESCRIPTOR_SIZE(array);
  75
  76   arraysize = size0 ((array_t *)array);
  77
  78   if (ret->base_addr == NULL)
  79     {
  80       int i;
  81
  82       ret->base_addr = xmallocarray (arraysize, size);
  83       ret->offset = 0;
  84       ret->dtype = array->dtype;
  85       for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
  86         {
  87           index_type ub, str;
  88
  89           ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
  90
  91           if (i == 0)
  92             str = 1;
  93           else
  94             str = GFC_DESCRIPTOR_EXTENT(ret,i-1) *
  95               GFC_DESCRIPTOR_STRIDE(ret,i-1);
  96
  97           GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
  98         }
  99     }
 100   else if (unlikely (compile_options.bounds_check))
 101     {
 102       bounds_equal_extents ((array_t *) ret, (array_t *) array,
 103                                  "return value", "CSHIFT");
 104     }
 105
 106   if (unlikely (compile_options.bounds_check))
 107     {
 108       bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
 109                               "SHIFT argument", "CSHIFT");
 110     }
 111
 112   if (arraysize == 0)
 113     return;
 114
 115   /* See if we should dispatch to a helper function.  */
 116
 117   type_size = GFC_DTYPE_TYPE_SIZE (array);
 118
 119   switch (type_size)
 120   {
 121     case GFC_DTYPE_LOGICAL_1:
 122     case GFC_DTYPE_INTEGER_1:
 123     case GFC_DTYPE_DERIVED_1:
 124       cshift1_4_i1 ((gfc_array_i1 *)ret, (gfc_array_i1 *) array,
 125                         h, pwhich);
 126       return;
 127
 128     case GFC_DTYPE_LOGICAL_2:
 129     case GFC_DTYPE_INTEGER_2:
 130       cshift1_4_i2 ((gfc_array_i2 *)ret, (gfc_array_i2 *) array,
 131                         h, pwhich);
 132       return;
 133
 134     case GFC_DTYPE_LOGICAL_4:
 135     case GFC_DTYPE_INTEGER_4:
 136       cshift1_4_i4 ((gfc_array_i4 *)ret, (gfc_array_i4 *) array,
 137                         h, pwhich);
 138       return;
 139
 140     case GFC_DTYPE_LOGICAL_8:
 141     case GFC_DTYPE_INTEGER_8:
 142       cshift1_4_i8 ((gfc_array_i8 *)ret, (gfc_array_i8 *) array,
 143                         h, pwhich);
 144       return;
 145
 146 #if defined (HAVE_INTEGER_16)
 147     case GFC_DTYPE_LOGICAL_16:
 148     case GFC_DTYPE_INTEGER_16:
 149       cshift1_4_i16 ((gfc_array_i16 *)ret, (gfc_array_i16 *) array,
 150                         h, pwhich);
 151       return;
 152 #endif
 153
 154     case GFC_DTYPE_REAL_4:
 155       cshift1_4_r4 ((gfc_array_r4 *)ret, (gfc_array_r4 *) array,
 156                         h, pwhich);
 157       return;
 158
 159     case GFC_DTYPE_REAL_8:
 160       cshift1_4_r8 ((gfc_array_r8 *)ret, (gfc_array_r8 *) array,
 161                         h, pwhich);
 162       return;
 163
 164 #if defined (HAVE_REAL_10)
 165     case GFC_DTYPE_REAL_10:
 166       cshift1_4_r10 ((gfc_array_r10 *)ret, (gfc_array_r10 *) array,
 167                         h, pwhich);
 168       return;
 169 #endif
 170
 171 #if defined (HAVE_REAL_16)
 172     case GFC_DTYPE_REAL_16:
 173       cshift1_4_r16 ((gfc_array_r16 *)ret, (gfc_array_r16 *) array,
 174                         h, pwhich);
 175       return;
 176 #endif
 177
 178     case GFC_DTYPE_COMPLEX_4:
 179       cshift1_4_c4 ((gfc_array_c4 *)ret, (gfc_array_c4 *) array,
 180                         h, pwhich);
 181       return;
 182
 183     case GFC_DTYPE_COMPLEX_8:
 184       cshift1_4_c8 ((gfc_array_c8 *)ret, (gfc_array_c8 *) array,
 185                         h, pwhich);
 186       return;
 187
 188 #if defined (HAVE_COMPLEX_10)
 189     case GFC_DTYPE_COMPLEX_10:
 190       cshift1_4_c10 ((gfc_array_c10 *)ret, (gfc_array_c10 *) array,
 191                         h, pwhich);
 192       return;
 193 #endif
 194
 195 #if defined (HAVE_COMPLEX_16)
 196     case GFC_DTYPE_COMPLEX_16:
 197       cshift1_4_c16 ((gfc_array_c16 *)ret, (gfc_array_c16 *) array,
 198                         h, pwhich);
 199       return;
 200 #endif
 201
 202     default:
 203       break;
 204
 205   }
 206
 207   extent[0] = 1;
 208   count[0] = 0;
 209   n = 0;
 210
 211   /* Initialized for avoiding compiler warnings.  */
 212   roffset = size;
 213   soffset = size;
 214   len = 0;
 215
 216   for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
 217     {
 218       if (dim == which)
 219         {
 220           roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
 221           if (roffset == 0)
 222             roffset = size;
 223           soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
 224           if (soffset == 0)
 225             soffset = size;
 226           len = GFC_DESCRIPTOR_EXTENT(array,dim);
 227         }
 228       else
 229         {
 230           count[n] = 0;
 231           extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
 232           rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
 233           sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
 234
 235           hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
 236           n++;
 237         }
 238     }
 239   if (sstride[0] == 0)
 240     sstride[0] = size;
 241   if (rstride[0] == 0)
 242     rstride[0] = size;
 243   if (hstride[0] == 0)
 244     hstride[0] = 1;
 245
 246   dim = GFC_DESCRIPTOR_RANK (array);
 247   rstride0 = rstride[0];
 248   sstride0 = sstride[0];
 249   hstride0 = hstride[0];
 250   rptr = ret->base_addr;
 251   sptr = array->base_addr;
 252   hptr = h->base_addr;
 253
 254   while (rptr)
 255     {
 256       /* Do the shift for this dimension.  */
 257       sh = *hptr;
 258       /* Normal case should be -len < sh < len; try to
 259          avoid the expensive remainder operation if possible.  */
 260       if (sh < 0)
 261         sh += len;
 262       if (unlikely (sh >= len || sh < 0))
 263         {
 264           sh = sh % len;
 265           if (sh < 0)
 266             sh += len;
 267         }
 268
 269       src = &sptr[sh * soffset];
 270       dest = rptr;
 271       if (soffset == size && roffset == size)
 272       {
 273         size_t len1 = sh * size;
 274         size_t len2 = (len - sh) * size;
 275         memcpy (rptr, sptr + len1, len2);
 276         memcpy (rptr + len2, sptr, len1);
 277       }
 278       else
 279         {
 280           for (n = 0; n < len - sh; n++)
 281             {
 282               memcpy (dest, src, size);
 283               dest += roffset;
 284               src += soffset;
 285             }
 286             for (src = sptr, n = 0; n < sh; n++)
 287               {
 288                 memcpy (dest, src, size);
 289                 dest += roffset;
 290                 src += soffset;
 291               }
 292           }
 293
 294       /* Advance to the next section.  */
 295       rptr += rstride0;
 296       sptr += sstride0;
 297       hptr += hstride0;
 298       count[0]++;
 299       n = 0;
 300       while (count[n] == extent[n])
 301         {
 302           /* When we get to the end of a dimension, reset it and increment
 303              the next dimension.  */
 304           count[n] = 0;
 305           /* We could precalculate these products, but this is a less
 306              frequently used path so probably not worth it.  */
 307           rptr -= rstride[n] * extent[n];
 308           sptr -= sstride[n] * extent[n];
 309           hptr -= hstride[n] * extent[n];
 310           n++;
 311           if (n >= dim - 1)
 312             {
 313               /* Break out of the loop.  */
 314               rptr = NULL;
 315               break;
 316             }
 317           else
 318             {
 319               count[n]++;
 320               rptr += rstride[n];
 321               sptr += sstride[n];
 322               hptr += hstride[n];
 323             }
 324         }
 325     }
 326 }
 327
 328 void cshift1_4 (gfc_array_char * const restrict,
 329         const gfc_array_char * const restrict,
 330         const gfc_array_i4 * const restrict,
 331         const GFC_INTEGER_4 * const restrict);
 332 export_proto(cshift1_4);
 333
 334 void
 335 cshift1_4 (gfc_array_char * const restrict ret,
 336         const gfc_array_char * const restrict array,
 337         const gfc_array_i4 * const restrict h,
 338         const GFC_INTEGER_4 * const restrict pwhich)
 339 {
 340   cshift1 (ret, array, h, pwhich);
 341 }
 342
 343
 344 void cshift1_4_char (gfc_array_char * const restrict ret,
 345         GFC_INTEGER_4,
 346         const gfc_array_char * const restrict array,
 347         const gfc_array_i4 * const restrict h,
 348         const GFC_INTEGER_4 * const restrict pwhich,
 349         GFC_INTEGER_4);
 350 export_proto(cshift1_4_char);
 351
 352 void
 353 cshift1_4_char (gfc_array_char * const restrict ret,
 354         GFC_INTEGER_4 ret_length __attribute__((unused)),
 355         const gfc_array_char * const restrict array,
 356         const gfc_array_i4 * const restrict h,
 357         const GFC_INTEGER_4 * const restrict pwhich,
 358         GFC_INTEGER_4 array_length __attribute__((unused)))
 359 {
 360   cshift1 (ret, array, h, pwhich);
 361 }
 362
 363
 364 void cshift1_4_char4 (gfc_array_char * const restrict ret,
 365         GFC_INTEGER_4,
 366         const gfc_array_char * const restrict array,
 367         const gfc_array_i4 * const restrict h,
 368         const GFC_INTEGER_4 * const restrict pwhich,
 369         GFC_INTEGER_4);
 370 export_proto(cshift1_4_char4);
 371
 372 void
 373 cshift1_4_char4 (gfc_array_char * const restrict ret,
 374         GFC_INTEGER_4 ret_length __attribute__((unused)),
 375         const gfc_array_char * const restrict array,
 376         const gfc_array_i4 * const restrict h,
 377         const GFC_INTEGER_4 * const restrict pwhich,
 378         GFC_INTEGER_4 array_length __attribute__((unused)))
 379 {
 380   cshift1 (ret, array, h, pwhich);
 381 }
 382
 383 #endif