1 `/* Special implementation of the SPREAD intrinsic
2 Copyright (C) 2008-2015 Free Software Foundation, Inc.
3 Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>, based on
4 spread_generic.c written by Paul Brook <paul@nowt.org>
6 This file is part of the GNU Fortran runtime library (libgfortran).
8 Libgfortran is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public
10 License as published by the Free Software Foundation; either
11 version 3 of the License, or (at your option) any later version.
13 Ligbfortran is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 Under Section 7 of GPL version 3, you are granted additional
19 permissions described in the GCC Runtime Library Exception, version
20 3.1, as published by the Free Software Foundation.
22 You should have received a copy of the GNU General Public License and
23 a copy of the GCC Runtime Library Exception along with this program;
24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
25 <http://www.gnu.org/licenses/>. */
27 #include "libgfortran.h"
34 `#if defined (HAVE_'rtype_name`)
37 spread_'rtype_code` ('rtype` *ret, const 'rtype` *source,
38 const index_type along, const index_type pncopies)
40 /* r.* indicates the return array. */
41 index_type rstride[GFC_MAX_DIMENSIONS];
43 index_type rdelta = 0;
47 'rtype_name` * restrict dest;
48 /* s.* indicates the source array. */
49 index_type sstride[GFC_MAX_DIMENSIONS];
52 const 'rtype_name` *sptr;
54 index_type count[GFC_MAX_DIMENSIONS];
55 index_type extent[GFC_MAX_DIMENSIONS];
60 srank = GFC_DESCRIPTOR_RANK(source);
63 if (rrank > GFC_MAX_DIMENSIONS)
64 runtime_error ("return rank too large in spread()");
67 runtime_error ("dim outside of rank in spread()");
71 if (ret->base_addr == NULL)
76 /* The front end has signalled that we need to populate the
77 return array descriptor. */
78 ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rrank;
81 for (n = 0; n < rrank; n++)
93 extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim);
94 sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim);
101 GFC_DIMENSION_SET(ret->dim[n], 0, ub, stride);
105 /* xmallocarray allocates a single byte for zero size. */
106 ret->base_addr = xmallocarray (rs, sizeof('rtype_name`));
117 if (GFC_DESCRIPTOR_RANK(ret) != rrank)
118 runtime_error ("rank mismatch in spread()");
120 if (unlikely (compile_options.bounds_check))
122 for (n = 0; n < rrank; n++)
124 index_type ret_extent;
126 ret_extent = GFC_DESCRIPTOR_EXTENT(ret,n);
129 rdelta = GFC_DESCRIPTOR_STRIDE(ret,n);
131 if (ret_extent != ncopies)
132 runtime_error("Incorrect extent in return value of SPREAD"
133 " intrinsic in dimension %ld: is %ld,"
134 " should be %ld", (long int) n+1,
135 (long int) ret_extent, (long int) ncopies);
140 extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim);
141 if (ret_extent != extent[dim])
142 runtime_error("Incorrect extent in return value of SPREAD"
143 " intrinsic in dimension %ld: is %ld,"
144 " should be %ld", (long int) n+1,
145 (long int) ret_extent,
146 (long int) extent[dim]);
148 if (extent[dim] <= 0)
150 sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim);
151 rstride[dim] = GFC_DESCRIPTOR_STRIDE(ret,n);
158 for (n = 0; n < rrank; n++)
162 rdelta = GFC_DESCRIPTOR_STRIDE(ret,n);
167 extent[dim] = GFC_DESCRIPTOR_EXTENT(source,dim);
168 if (extent[dim] <= 0)
170 sstride[dim] = GFC_DESCRIPTOR_STRIDE(source,dim);
171 rstride[dim] = GFC_DESCRIPTOR_STRIDE(ret,n);
183 sstride0 = sstride[0];
184 rstride0 = rstride[0];
185 rptr = ret->base_addr;
186 sptr = source->base_addr;
190 /* Spread this element. */
192 for (n = 0; n < ncopies; n++)
197 /* Advance to the next element. */
202 while (count[n] == extent[n])
204 /* When we get to the end of a dimension, reset it and increment
205 the next dimension. */
207 /* We could precalculate these products, but this is a less
208 frequently used path so probably not worth it. */
209 sptr -= sstride[n] * extent[n];
210 rptr -= rstride[n] * extent[n];
214 /* Break out of the loop. */
228 /* This version of spread_internal treats the special case of a scalar
229 source. This is much simpler than the more general case above. */
232 spread_scalar_'rtype_code` ('rtype` *ret, const 'rtype_name` *source,
233 const index_type along, const index_type pncopies)
236 int ncopies = pncopies;
237 'rtype_name` * restrict dest;
240 if (GFC_DESCRIPTOR_RANK (ret) != 1)
241 runtime_error ("incorrect destination rank in spread()");
244 runtime_error ("dim outside of rank in spread()");
246 if (ret->base_addr == NULL)
248 ret->base_addr = xmallocarray (ncopies, sizeof ('rtype_name`));
250 GFC_DIMENSION_SET(ret->dim[0], 0, ncopies - 1, 1);
254 if (ncopies - 1 > (GFC_DESCRIPTOR_EXTENT(ret,0) - 1)
255 / GFC_DESCRIPTOR_STRIDE(ret,0))
256 runtime_error ("dim too large in spread()");
259 dest = ret->base_addr;
260 stride = GFC_DESCRIPTOR_STRIDE(ret,0);
262 for (n = 0; n < ncopies; n++)