1 /* Special implementation of the SPREAD intrinsic
2 Copyright 2008, 2009, 2012 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"
33 #if defined (HAVE_GFC_REAL_8)
36 spread_r8 (gfc_array_r8
*ret
, const gfc_array_r8
*source
,
37 const index_type along
, const index_type pncopies
)
39 /* r.* indicates the return array. */
40 index_type rstride
[GFC_MAX_DIMENSIONS
];
42 index_type rdelta
= 0;
46 GFC_REAL_8
* restrict dest
;
47 /* s.* indicates the source array. */
48 index_type sstride
[GFC_MAX_DIMENSIONS
];
51 const GFC_REAL_8
*sptr
;
53 index_type count
[GFC_MAX_DIMENSIONS
];
54 index_type extent
[GFC_MAX_DIMENSIONS
];
59 srank
= GFC_DESCRIPTOR_RANK(source
);
62 if (rrank
> GFC_MAX_DIMENSIONS
)
63 runtime_error ("return rank too large in spread()");
66 runtime_error ("dim outside of rank in spread()");
70 if (ret
->base_addr
== NULL
)
75 /* The front end has signalled that we need to populate the
76 return array descriptor. */
77 ret
->dtype
= (source
->dtype
& ~GFC_DTYPE_RANK_MASK
) | rrank
;
80 for (n
= 0; n
< rrank
; n
++)
92 extent
[dim
] = GFC_DESCRIPTOR_EXTENT(source
,dim
);
93 sstride
[dim
] = GFC_DESCRIPTOR_STRIDE(source
,dim
);
100 GFC_DIMENSION_SET(ret
->dim
[n
], 0, ub
, stride
);
104 /* internal_malloc_size allocates a single byte for zero size. */
105 ret
->base_addr
= internal_malloc_size (rs
* sizeof(GFC_REAL_8
));
116 if (GFC_DESCRIPTOR_RANK(ret
) != rrank
)
117 runtime_error ("rank mismatch in spread()");
119 if (unlikely (compile_options
.bounds_check
))
121 for (n
= 0; n
< rrank
; n
++)
123 index_type ret_extent
;
125 ret_extent
= GFC_DESCRIPTOR_EXTENT(ret
,n
);
128 rdelta
= GFC_DESCRIPTOR_STRIDE(ret
,n
);
130 if (ret_extent
!= ncopies
)
131 runtime_error("Incorrect extent in return value of SPREAD"
132 " intrinsic in dimension %ld: is %ld,"
133 " should be %ld", (long int) n
+1,
134 (long int) ret_extent
, (long int) ncopies
);
139 extent
[dim
] = GFC_DESCRIPTOR_EXTENT(source
,dim
);
140 if (ret_extent
!= extent
[dim
])
141 runtime_error("Incorrect extent in return value of SPREAD"
142 " intrinsic in dimension %ld: is %ld,"
143 " should be %ld", (long int) n
+1,
144 (long int) ret_extent
,
145 (long int) extent
[dim
]);
147 if (extent
[dim
] <= 0)
149 sstride
[dim
] = GFC_DESCRIPTOR_STRIDE(source
,dim
);
150 rstride
[dim
] = GFC_DESCRIPTOR_STRIDE(ret
,n
);
157 for (n
= 0; n
< rrank
; n
++)
161 rdelta
= GFC_DESCRIPTOR_STRIDE(ret
,n
);
166 extent
[dim
] = GFC_DESCRIPTOR_EXTENT(source
,dim
);
167 if (extent
[dim
] <= 0)
169 sstride
[dim
] = GFC_DESCRIPTOR_STRIDE(source
,dim
);
170 rstride
[dim
] = GFC_DESCRIPTOR_STRIDE(ret
,n
);
182 sstride0
= sstride
[0];
183 rstride0
= rstride
[0];
184 rptr
= ret
->base_addr
;
185 sptr
= source
->base_addr
;
189 /* Spread this element. */
191 for (n
= 0; n
< ncopies
; n
++)
196 /* Advance to the next element. */
201 while (count
[n
] == extent
[n
])
203 /* When we get to the end of a dimension, reset it and increment
204 the next dimension. */
206 /* We could precalculate these products, but this is a less
207 frequently used path so probably not worth it. */
208 sptr
-= sstride
[n
] * extent
[n
];
209 rptr
-= rstride
[n
] * extent
[n
];
213 /* Break out of the loop. */
227 /* This version of spread_internal treats the special case of a scalar
228 source. This is much simpler than the more general case above. */
231 spread_scalar_r8 (gfc_array_r8
*ret
, const GFC_REAL_8
*source
,
232 const index_type along
, const index_type pncopies
)
235 int ncopies
= pncopies
;
236 GFC_REAL_8
* restrict dest
;
239 if (GFC_DESCRIPTOR_RANK (ret
) != 1)
240 runtime_error ("incorrect destination rank in spread()");
243 runtime_error ("dim outside of rank in spread()");
245 if (ret
->base_addr
== NULL
)
247 ret
->base_addr
= internal_malloc_size (ncopies
* sizeof (GFC_REAL_8
));
249 GFC_DIMENSION_SET(ret
->dim
[0], 0, ncopies
- 1, 1);
253 if (ncopies
- 1 > (GFC_DESCRIPTOR_EXTENT(ret
,0) - 1)
254 / GFC_DESCRIPTOR_STRIDE(ret
,0))
255 runtime_error ("dim too large in spread()");
258 dest
= ret
->base_addr
;
259 stride
= GFC_DESCRIPTOR_STRIDE(ret
,0);
261 for (n
= 0; n
< ncopies
; n
++)