1 `/* Implementation of the CSHIFT intrinsic
2 Copyright (C) 2003-2024 Free Software Foundation, Inc.
3 Contributed by Feng Wang <wf_cs@yahoo.com>
5 This file is part of the GNU Fortran runtime library (libgfortran).
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.
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.
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.
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/>. */
26 #include "libgfortran.h"
31 `#if defined (HAVE_'atype_name`)
34 cshift1 (gfc_array_char * const restrict ret,
35 const gfc_array_char * const restrict array,
36 const 'atype` * const restrict h,
37 const 'atype_name` * const restrict pwhich)
39 /* r.* indicates the return array. */
40 index_type rstride[GFC_MAX_DIMENSIONS];
45 /* s.* indicates the source array. */
46 index_type sstride[GFC_MAX_DIMENSIONS];
51 /* h.* indicates the shift array. */
52 index_type hstride[GFC_MAX_DIMENSIONS];
54 const 'atype_name` *hptr;
56 index_type count[GFC_MAX_DIMENSIONS];
57 index_type extent[GFC_MAX_DIMENSIONS];
72 if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
73 runtime_error ("Argument ''`DIM''` is out of range in call to ''`CSHIFT''`");
75 size = GFC_DESCRIPTOR_SIZE(array);
77 arraysize = size0 ((array_t *)array);
79 if (ret->base_addr == NULL)
81 ret->base_addr = xmallocarray (arraysize, size);
83 GFC_DTYPE_COPY(ret,array);
84 for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
88 ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
93 str = GFC_DESCRIPTOR_EXTENT(ret,i-1) *
94 GFC_DESCRIPTOR_STRIDE(ret,i-1);
96 GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
99 else if (unlikely (compile_options.bounds_check))
101 bounds_equal_extents ((array_t *) ret, (array_t *) array,
102 "return value", "CSHIFT");
105 if (unlikely (compile_options.bounds_check))
107 bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
108 "SHIFT argument", "CSHIFT");
114 /* See if we should dispatch to a helper function. */
116 type_size = GFC_DTYPE_TYPE_SIZE (array);
120 case GFC_DTYPE_LOGICAL_1:
121 case GFC_DTYPE_INTEGER_1:
122 cshift1_'atype_kind`_i1 ((gfc_array_i1 *)ret, (gfc_array_i1 *) array,
126 case GFC_DTYPE_LOGICAL_2:
127 case GFC_DTYPE_INTEGER_2:
128 cshift1_'atype_kind`_i2 ((gfc_array_i2 *)ret, (gfc_array_i2 *) array,
132 case GFC_DTYPE_LOGICAL_4:
133 case GFC_DTYPE_INTEGER_4:
134 cshift1_'atype_kind`_i4 ((gfc_array_i4 *)ret, (gfc_array_i4 *) array,
138 case GFC_DTYPE_LOGICAL_8:
139 case GFC_DTYPE_INTEGER_8:
140 cshift1_'atype_kind`_i8 ((gfc_array_i8 *)ret, (gfc_array_i8 *) array,
144 #if defined (HAVE_INTEGER_16)
145 case GFC_DTYPE_LOGICAL_16:
146 case GFC_DTYPE_INTEGER_16:
147 cshift1_'atype_kind`_i16 ((gfc_array_i16 *)ret, (gfc_array_i16 *) array,
152 case GFC_DTYPE_REAL_4:
153 cshift1_'atype_kind`_r4 ((gfc_array_r4 *)ret, (gfc_array_r4 *) array,
157 case GFC_DTYPE_REAL_8:
158 cshift1_'atype_kind`_r8 ((gfc_array_r8 *)ret, (gfc_array_r8 *) array,
162 #if defined (HAVE_REAL_10)
163 case GFC_DTYPE_REAL_10:
164 cshift1_'atype_kind`_r10 ((gfc_array_r10 *)ret, (gfc_array_r10 *) array,
169 #if defined (HAVE_REAL_16)
170 case GFC_DTYPE_REAL_16:
171 cshift1_'atype_kind`_r16 ((gfc_array_r16 *)ret, (gfc_array_r16 *) array,
176 case GFC_DTYPE_COMPLEX_4:
177 cshift1_'atype_kind`_c4 ((gfc_array_c4 *)ret, (gfc_array_c4 *) array,
181 case GFC_DTYPE_COMPLEX_8:
182 cshift1_'atype_kind`_c8 ((gfc_array_c8 *)ret, (gfc_array_c8 *) array,
186 #if defined (HAVE_COMPLEX_10)
187 case GFC_DTYPE_COMPLEX_10:
188 cshift1_'atype_kind`_c10 ((gfc_array_c10 *)ret, (gfc_array_c10 *) array,
193 #if defined (HAVE_COMPLEX_16)
194 case GFC_DTYPE_COMPLEX_16:
195 cshift1_'atype_kind`_c16 ((gfc_array_c16 *)ret, (gfc_array_c16 *) array,
209 /* Initialized for avoiding compiler warnings. */
214 for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
218 roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
221 soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
224 len = GFC_DESCRIPTOR_EXTENT(array,dim);
229 extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
230 rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
231 sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
233 hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
244 dim = GFC_DESCRIPTOR_RANK (array);
245 rstride0 = rstride[0];
246 sstride0 = sstride[0];
247 hstride0 = hstride[0];
248 rptr = ret->base_addr;
249 sptr = array->base_addr;
254 /* Do the shift for this dimension. */
256 /* Normal case should be -len < sh < len; try to
257 avoid the expensive remainder operation if possible. */
260 if (unlikely (sh >= len || sh < 0))
267 src = &sptr[sh * soffset];
269 if (soffset == size && roffset == size)
271 size_t len1 = sh * size;
272 size_t len2 = (len - sh) * size;
273 memcpy (rptr, sptr + len1, len2);
274 memcpy (rptr + len2, sptr, len1);
278 for (n = 0; n < len - sh; n++)
280 memcpy (dest, src, size);
284 for (src = sptr, n = 0; n < sh; n++)
286 memcpy (dest, src, size);
292 /* Advance to the next section. */
298 while (count[n] == extent[n])
300 /* When we get to the end of a dimension, reset it and increment
301 the next dimension. */
303 /* We could precalculate these products, but this is a less
304 frequently used path so probably not worth it. */
305 rptr -= rstride[n] * extent[n];
306 sptr -= sstride[n] * extent[n];
307 hptr -= hstride[n] * extent[n];
311 /* Break out of the loop. */
326 void cshift1_'atype_kind` (gfc_array_char * const restrict,
327 const gfc_array_char * const restrict,
328 const 'atype` * const restrict,
329 const 'atype_name` * const restrict);
330 export_proto(cshift1_'atype_kind`);
333 cshift1_'atype_kind` (gfc_array_char * const restrict ret,
334 const gfc_array_char * const restrict array,
335 const 'atype` * const restrict h,
336 const 'atype_name` * const restrict pwhich)
338 cshift1 (ret, array, h, pwhich);
342 void cshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
344 const gfc_array_char * const restrict array,
345 const 'atype` * const restrict h,
346 const 'atype_name` * const restrict pwhich,
348 export_proto(cshift1_'atype_kind`_char);
351 cshift1_'atype_kind`_char (gfc_array_char * const restrict ret,
352 GFC_INTEGER_4 ret_length __attribute__((unused)),
353 const gfc_array_char * const restrict array,
354 const 'atype` * const restrict h,
355 const 'atype_name` * const restrict pwhich,
356 GFC_INTEGER_4 array_length __attribute__((unused)))
358 cshift1 (ret, array, h, pwhich);
362 void cshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
364 const gfc_array_char * const restrict array,
365 const 'atype` * const restrict h,
366 const 'atype_name` * const restrict pwhich,
368 export_proto(cshift1_'atype_kind`_char4);
371 cshift1_'atype_kind`_char4 (gfc_array_char * const restrict ret,
372 GFC_INTEGER_4 ret_length __attribute__((unused)),
373 const gfc_array_char * const restrict array,
374 const 'atype` * const restrict h,
375 const 'atype_name` * const restrict pwhich,
376 GFC_INTEGER_4 array_length __attribute__((unused)))
378 cshift1 (ret, array, h, pwhich);