| /* Implementation of the DOT_PRODUCT intrinsic |
| Copyright 2002 Free Software Foundation, Inc. |
| Contributed by Paul Brook <paul@nowt.org> |
| |
| This file is part of the GNU Fortran 95 runtime library (libgfortran). |
| |
| Libgfortran is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| In addition to the permissions in the GNU General Public License, the |
| Free Software Foundation gives you unlimited permission to link the |
| compiled version of this file into combinations with other programs, |
| and to distribute those combinations without any restriction coming |
| from the use of this file. (The General Public License restrictions |
| do apply in other respects; for example, they cover modification of |
| the file, and distribution when not linked into a combine |
| executable.) |
| |
| Libgfortran is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public |
| License along with libgfortran; see the file COPYING. If not, |
| write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. */ |
| |
| #include "config.h" |
| #include <stdlib.h> |
| #include <assert.h> |
| #include "libgfortran.h" |
| |
| #if defined (HAVE_GFC_INTEGER_4) |
| |
| typedef GFC_ARRAY_DESCRIPTOR(GFC_MAX_DIMENSIONS, char) char_array; |
| |
| extern GFC_INTEGER_4 dot_product_i4 (gfc_array_i4 * a, gfc_array_i4 * b); |
| export_proto(dot_product_i4); |
| |
| /* Both parameters will already have been converted to the result type. */ |
| GFC_INTEGER_4 |
| dot_product_i4 (gfc_array_i4 * a, gfc_array_i4 * b) |
| { |
| GFC_INTEGER_4 *pa; |
| GFC_INTEGER_4 *pb; |
| GFC_INTEGER_4 res; |
| index_type count; |
| index_type astride; |
| index_type bstride; |
| |
| assert (GFC_DESCRIPTOR_RANK (a) == 1 |
| && GFC_DESCRIPTOR_RANK (b) == 1); |
| |
| if (a->dim[0].stride == 0) |
| a->dim[0].stride = 1; |
| if (b->dim[0].stride == 0) |
| b->dim[0].stride = 1; |
| |
| astride = a->dim[0].stride; |
| bstride = b->dim[0].stride; |
| count = a->dim[0].ubound + 1 - a->dim[0].lbound; |
| res = 0; |
| pa = a->data; |
| pb = b->data; |
| |
| while (count--) |
| { |
| res += *pa * *pb; |
| pa += astride; |
| pb += bstride; |
| } |
| |
| return res; |
| } |
| |
| #endif |