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+/* 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 (libgfor).
+
+Libgfortran is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB. If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include "libgfortran.h"
+
+typedef GFC_ARRAY_DESCRIPTOR(GFC_MAX_DIMENSIONS, char) char_array;
+
+/* Both parameters will already have been converted to the result type. */
+GFC_INTEGER_8
+__dot_product_i8 (gfc_array_i8 * a, gfc_array_i8 * b)
+{
+ GFC_INTEGER_8 *pa;
+ GFC_INTEGER_8 *pb;
+ GFC_INTEGER_8 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;
+}
+