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644cb69f FXC |
1 | /* Implementation of the COUNT intrinsic |
2 | Copyright 2002 Free Software Foundation, Inc. | |
3 | Contributed by Paul Brook <paul@nowt.org> | |
4 | ||
5 | This file is part of the GNU Fortran 95 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 2 of the License, or (at your option) any later version. | |
11 | ||
12 | In addition to the permissions in the GNU General Public License, the | |
13 | Free Software Foundation gives you unlimited permission to link the | |
14 | compiled version of this file into combinations with other programs, | |
15 | and to distribute those combinations without any restriction coming | |
16 | from the use of this file. (The General Public License restrictions | |
17 | do apply in other respects; for example, they cover modification of | |
18 | the file, and distribution when not linked into a combine | |
19 | executable.) | |
20 | ||
21 | Libgfortran is distributed in the hope that it will be useful, | |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | GNU General Public License for more details. | |
25 | ||
26 | You should have received a copy of the GNU General Public | |
27 | License along with libgfortran; see the file COPYING. If not, | |
28 | write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
29 | Boston, MA 02110-1301, USA. */ | |
30 | ||
31 | #include "config.h" | |
32 | #include <stdlib.h> | |
33 | #include <assert.h> | |
34 | #include "libgfortran.h" | |
35 | ||
36 | ||
37 | #if defined (HAVE_GFC_LOGICAL_16) && defined (HAVE_GFC_INTEGER_16) | |
38 | ||
39 | ||
64acfd99 JB |
40 | extern void count_16_l16 (gfc_array_i16 * const restrict, |
41 | gfc_array_l16 * const restrict, const index_type * const restrict); | |
644cb69f FXC |
42 | export_proto(count_16_l16); |
43 | ||
44 | void | |
64acfd99 JB |
45 | count_16_l16 (gfc_array_i16 * const restrict retarray, |
46 | gfc_array_l16 * const restrict array, | |
47 | const index_type * const restrict pdim) | |
644cb69f FXC |
48 | { |
49 | index_type count[GFC_MAX_DIMENSIONS]; | |
50 | index_type extent[GFC_MAX_DIMENSIONS]; | |
51 | index_type sstride[GFC_MAX_DIMENSIONS]; | |
52 | index_type dstride[GFC_MAX_DIMENSIONS]; | |
64acfd99 JB |
53 | const GFC_LOGICAL_16 * restrict base; |
54 | GFC_INTEGER_16 * restrict dest; | |
644cb69f FXC |
55 | index_type rank; |
56 | index_type n; | |
57 | index_type len; | |
58 | index_type delta; | |
59 | index_type dim; | |
60 | ||
61 | /* Make dim zero based to avoid confusion. */ | |
62 | dim = (*pdim) - 1; | |
63 | rank = GFC_DESCRIPTOR_RANK (array) - 1; | |
64 | ||
644cb69f FXC |
65 | len = array->dim[dim].ubound + 1 - array->dim[dim].lbound; |
66 | delta = array->dim[dim].stride; | |
67 | ||
68 | for (n = 0; n < dim; n++) | |
69 | { | |
70 | sstride[n] = array->dim[n].stride; | |
71 | extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound; | |
80ee04b9 TK |
72 | |
73 | if (extent[n] < 0) | |
74 | extent[n] = 0; | |
644cb69f FXC |
75 | } |
76 | for (n = dim; n < rank; n++) | |
77 | { | |
78 | sstride[n] = array->dim[n + 1].stride; | |
79 | extent[n] = | |
80 | array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound; | |
80ee04b9 TK |
81 | |
82 | if (extent[n] < 0) | |
83 | extent[n] = 0; | |
644cb69f FXC |
84 | } |
85 | ||
86 | if (retarray->data == NULL) | |
87 | { | |
80ee04b9 TK |
88 | size_t alloc_size; |
89 | ||
644cb69f FXC |
90 | for (n = 0; n < rank; n++) |
91 | { | |
92 | retarray->dim[n].lbound = 0; | |
93 | retarray->dim[n].ubound = extent[n]-1; | |
94 | if (n == 0) | |
95 | retarray->dim[n].stride = 1; | |
96 | else | |
97 | retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1]; | |
98 | } | |
99 | ||
644cb69f FXC |
100 | retarray->offset = 0; |
101 | retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank; | |
80ee04b9 TK |
102 | |
103 | alloc_size = sizeof (GFC_INTEGER_16) * retarray->dim[rank-1].stride | |
104 | * extent[rank-1]; | |
105 | ||
106 | if (alloc_size == 0) | |
107 | { | |
108 | /* Make sure we have a zero-sized array. */ | |
109 | retarray->dim[0].lbound = 0; | |
110 | retarray->dim[0].ubound = -1; | |
111 | return; | |
112 | } | |
113 | else | |
114 | retarray->data = internal_malloc_size (alloc_size); | |
644cb69f FXC |
115 | } |
116 | else | |
117 | { | |
644cb69f FXC |
118 | if (rank != GFC_DESCRIPTOR_RANK (retarray)) |
119 | runtime_error ("rank of return array incorrect"); | |
120 | } | |
121 | ||
122 | for (n = 0; n < rank; n++) | |
123 | { | |
124 | count[n] = 0; | |
125 | dstride[n] = retarray->dim[n].stride; | |
126 | if (extent[n] <= 0) | |
127 | len = 0; | |
128 | } | |
129 | ||
130 | base = array->data; | |
131 | dest = retarray->data; | |
132 | ||
133 | while (base) | |
134 | { | |
64acfd99 | 135 | const GFC_LOGICAL_16 * restrict src; |
644cb69f FXC |
136 | GFC_INTEGER_16 result; |
137 | src = base; | |
138 | { | |
139 | ||
140 | result = 0; | |
141 | if (len <= 0) | |
142 | *dest = 0; | |
143 | else | |
144 | { | |
145 | for (n = 0; n < len; n++, src += delta) | |
146 | { | |
147 | ||
148 | if (*src) | |
149 | result++; | |
150 | } | |
151 | *dest = result; | |
152 | } | |
153 | } | |
154 | /* Advance to the next element. */ | |
155 | count[0]++; | |
156 | base += sstride[0]; | |
157 | dest += dstride[0]; | |
158 | n = 0; | |
159 | while (count[n] == extent[n]) | |
160 | { | |
161 | /* When we get to the end of a dimension, reset it and increment | |
162 | the next dimension. */ | |
163 | count[n] = 0; | |
164 | /* We could precalculate these products, but this is a less | |
5d7adf7a | 165 | frequently used path so probably not worth it. */ |
644cb69f FXC |
166 | base -= sstride[n] * extent[n]; |
167 | dest -= dstride[n] * extent[n]; | |
168 | n++; | |
169 | if (n == rank) | |
170 | { | |
171 | /* Break out of the look. */ | |
172 | base = NULL; | |
173 | break; | |
174 | } | |
175 | else | |
176 | { | |
177 | count[n]++; | |
178 | base += sstride[n]; | |
179 | dest += dstride[n]; | |
180 | } | |
181 | } | |
182 | } | |
183 | } | |
184 | ||
185 | #endif |