1 `/* Implementation of the RESHAPE intrinsic
2 Copyright (C) 2002-2017 Free Software Foundation, Inc.
3 Contributed by Paul Brook <paul@nowt.org>
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 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.
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"'
30 `#if defined (HAVE_'rtype_name`)
32 typedef GFC_ARRAY_DESCRIPTOR(1, 'index_type`) 'shape_type`;'
34 dnl For integer routines, only the kind (ie size) is used to name the
35 dnl function. The same function will be used for integer and logical
36 dnl arrays of the same kind.
38 `extern void reshape_'rtype_ccode` ('rtype` * const restrict,
39 'rtype` * const restrict,
40 'shape_type` * const restrict,
41 'rtype` * const restrict,
42 'shape_type` * const restrict);
43 export_proto(reshape_'rtype_ccode`);
46 reshape_'rtype_ccode` ('rtype` * const restrict ret,
47 'rtype` * const restrict source,
48 'shape_type` * const restrict shape,
49 'rtype` * const restrict pad,
50 'shape_type` * const restrict order)
52 /* r.* indicates the return array. */
53 index_type rcount[GFC_MAX_DIMENSIONS];
54 index_type rextent[GFC_MAX_DIMENSIONS];
55 index_type rstride[GFC_MAX_DIMENSIONS];
62 /* s.* indicates the source array. */
63 index_type scount[GFC_MAX_DIMENSIONS];
64 index_type sextent[GFC_MAX_DIMENSIONS];
65 index_type sstride[GFC_MAX_DIMENSIONS];
69 const 'rtype_name` *sptr;
70 /* p.* indicates the pad array. */
71 index_type pcount[GFC_MAX_DIMENSIONS];
72 index_type pextent[GFC_MAX_DIMENSIONS];
73 index_type pstride[GFC_MAX_DIMENSIONS];
76 const 'rtype_name` *pptr;
78 const 'rtype_name` *src;
81 int sempty, pempty, shape_empty;
82 index_type shape_data[GFC_MAX_DIMENSIONS];
84 rdim = GFC_DESCRIPTOR_EXTENT(shape,0);
85 /* rdim is always > 0; this lets the compiler optimize more and
86 avoids a potential warning. */
89 if (rdim != GFC_DESCRIPTOR_RANK(ret))
90 runtime_error("rank of return array incorrect in RESHAPE intrinsic");
94 for (n = 0; n < rdim; n++)
96 shape_data[n] = shape->base_addr[n * GFC_DESCRIPTOR_STRIDE(shape,0)];
97 if (shape_data[n] <= 0)
104 if (ret->base_addr == NULL)
106 index_type alloc_size;
109 for (n = 0; n < rdim; n++)
113 GFC_DIMENSION_SET(ret->dim[n], 0, rex - 1, rs);
119 if (unlikely (rs < 1))
124 ret->base_addr = xmallocarray (alloc_size, sizeof ('rtype_name`));
125 ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rdim;
133 pdim = GFC_DESCRIPTOR_RANK (pad);
136 for (n = 0; n < pdim; n++)
139 pstride[n] = GFC_DESCRIPTOR_STRIDE(pad,n);
140 pextent[n] = GFC_DESCRIPTOR_EXTENT(pad,n);
147 if (psize == pstride[n])
152 pptr = pad->base_addr;
162 if (unlikely (compile_options.bounds_check))
164 index_type ret_extent, source_extent;
167 for (n = 0; n < rdim; n++)
170 ret_extent = GFC_DESCRIPTOR_EXTENT(ret,n);
171 if (ret_extent != shape_data[n])
172 runtime_error("Incorrect extent in return value of RESHAPE"
173 " intrinsic in dimension %ld: is %ld,"
174 " should be %ld", (long int) n+1,
175 (long int) ret_extent, (long int) shape_data[n]);
179 sdim = GFC_DESCRIPTOR_RANK (source);
180 for (n = 0; n < sdim; n++)
183 se = GFC_DESCRIPTOR_EXTENT(source,n);
184 source_extent *= se > 0 ? se : 0;
187 if (rs > source_extent && (!pad || pempty))
188 runtime_error("Incorrect size in SOURCE argument to RESHAPE"
189 " intrinsic: is %ld, should be %ld",
190 (long int) source_extent, (long int) rs);
194 int seen[GFC_MAX_DIMENSIONS];
197 for (n = 0; n < rdim; n++)
200 for (n = 0; n < rdim; n++)
202 v = order->base_addr[n * GFC_DESCRIPTOR_STRIDE(order,0)] - 1;
204 if (v < 0 || v >= rdim)
205 runtime_error("Value %ld out of range in ORDER argument"
206 " to RESHAPE intrinsic", (long int) v + 1);
209 runtime_error("Duplicate value %ld in ORDER argument to"
210 " RESHAPE intrinsic", (long int) v + 1);
218 for (n = 0; n < rdim; n++)
221 dim = order->base_addr[n * GFC_DESCRIPTOR_STRIDE(order,0)] - 1;
226 rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,dim);
227 rextent[n] = GFC_DESCRIPTOR_EXTENT(ret,dim);
231 if (rextent[n] != shape_data[dim])
232 runtime_error ("shape and target do not conform");
234 if (rsize == rstride[n])
242 sdim = GFC_DESCRIPTOR_RANK (source);
244 /* sdim is always > 0; this lets the compiler optimize more and
250 for (n = 0; n < sdim; n++)
253 sstride[n] = GFC_DESCRIPTOR_STRIDE(source,n);
254 sextent[n] = GFC_DESCRIPTOR_EXTENT(source,n);
261 if (ssize == sstride[n])
267 if (rsize != 0 && ssize != 0 && psize != 0)
269 rsize *= sizeof ('rtype_name`);
270 ssize *= sizeof ('rtype_name`);
271 psize *= sizeof ('rtype_name`);
272 reshape_packed ((char *)ret->base_addr, rsize, (char *)source->base_addr,
273 ssize, pad ? (char *)pad->base_addr : NULL, psize);
276 rptr = ret->base_addr;
277 src = sptr = source->base_addr;
278 rstride0 = rstride[0];
279 sstride0 = sstride[0];
281 if (sempty && pempty)
286 /* Pretend we are using the pad array the first time around, too. */
290 for (dim = 0; dim < pdim; dim++)
292 scount[dim] = pcount[dim];
293 sextent[dim] = pextent[dim];
294 sstride[dim] = pstride[dim];
295 sstride0 = pstride[0];
301 /* Select between the source and pad arrays. */
303 /* Advance to the next element. */
309 /* Advance to the next destination element. */
311 while (rcount[n] == rextent[n])
313 /* When we get to the end of a dimension, reset it and increment
314 the next dimension. */
316 /* We could precalculate these products, but this is a less
317 frequently used path so probably not worth it. */
318 rptr -= rstride[n] * rextent[n];
322 /* Break out of the loop. */
332 /* Advance to the next source element. */
334 while (scount[n] == sextent[n])
336 /* When we get to the end of a dimension, reset it and increment
337 the next dimension. */
339 /* We could precalculate these products, but this is a less
340 frequently used path so probably not worth it. */
341 src -= sstride[n] * sextent[n];
347 /* Switch to the pad array. */
350 for (dim = 0; dim < pdim; dim++)
352 scount[dim] = pcount[dim];
353 sextent[dim] = pextent[dim];
354 sstride[dim] = pstride[dim];
355 sstride0 = sstride[0];
358 /* We now start again from the beginning of the pad array. */