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1 | /* Implementation of the DOT_PRODUCT intrinsic |
2 | Copyright 2002 Free Software Foundation, Inc. | |
3 | Contributed by Paul Brook <paul@nowt.org> | |
4 | ||
57dea9f6 | 5 | This file is part of the GNU Fortran 95 runtime library (libgfortran). |
6de9cd9a DN |
6 | |
7 | Libgfortran is free software; you can redistribute it and/or | |
57dea9f6 | 8 | modify it under the terms of the GNU General Public |
6de9cd9a | 9 | License as published by the Free Software Foundation; either |
57dea9f6 TM |
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.) | |
6de9cd9a DN |
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 | |
57dea9f6 | 24 | GNU General Public License for more details. |
6de9cd9a | 25 | |
57dea9f6 TM |
26 | You should have received a copy of the GNU General Public |
27 | License along with libgfortran; see the file COPYING. If not, | |
6de9cd9a DN |
28 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
29 | Boston, MA 02111-1307, USA. */ | |
30 | ||
31 | #include "config.h" | |
32 | #include <stdlib.h> | |
33 | #include <assert.h> | |
34 | #include "libgfortran.h" | |
35 | ||
7f68c75f RH |
36 | extern GFC_LOGICAL_4 dot_product_l4 (gfc_array_l4 *, gfc_array_l4 *); |
37 | export_proto(dot_product_l4); | |
7d7b8bfe | 38 | |
6de9cd9a | 39 | GFC_LOGICAL_4 |
7f68c75f | 40 | dot_product_l4 (gfc_array_l4 * a, gfc_array_l4 * b) |
6de9cd9a DN |
41 | { |
42 | GFC_LOGICAL_4 *pa; | |
43 | GFC_LOGICAL_4 *pb; | |
44 | index_type count; | |
45 | index_type astride; | |
46 | index_type bstride; | |
47 | ||
48 | assert (GFC_DESCRIPTOR_RANK (a) == 1 | |
49 | && GFC_DESCRIPTOR_RANK (b) == 1); | |
50 | ||
51 | if (a->dim[0].stride == 0) | |
52 | a->dim[0].stride = 1; | |
53 | if (b->dim[0].stride == 0) | |
54 | b->dim[0].stride = 1; | |
55 | ||
56 | astride = a->dim[0].stride; | |
57 | bstride = b->dim[0].stride; | |
58 | count = a->dim[0].ubound + 1 - a->dim[0].lbound; | |
59 | ||
60 | pa = a->data; | |
61 | if (GFC_DESCRIPTOR_SIZE (a) != 4) | |
62 | { | |
63 | assert (GFC_DESCRIPTOR_SIZE (a) == 8); | |
64 | pa = GFOR_POINTER_L8_TO_L4 (pa); | |
65 | astride <<= 1; | |
66 | } | |
67 | pb = b->data; | |
68 | if (GFC_DESCRIPTOR_SIZE (b) != 4) | |
69 | { | |
70 | assert (GFC_DESCRIPTOR_SIZE (b) == 8); | |
71 | pb = GFOR_POINTER_L8_TO_L4 (pb); | |
72 | bstride <<= 1; | |
73 | } | |
74 | ||
75 | while (count--) | |
76 | { | |
77 | if (*pa && *pb) | |
78 | return 1; | |
79 | ||
80 | pa += astride; | |
81 | pb += bstride; | |
82 | } | |
83 | ||
84 | return 0; | |
85 | } |