/* Support routines for the intrinsic power (**) operator.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright 2004, 2007, 2009 Free Software Foundation, Inc.
Contributed by Paul Brook
-This file is part of the GNU Fortran 95 runtime library (libgfor).
+This file is part of the GNU Fortran 95 runtime library (libgfortran).
-Libgfor is free software; you can redistribute it and/or
-modify it under the terms of the GNU Lesser General Public
+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 2.1 of the License, or (at your option) any later version.
+version 3 of the License, or (at your option) any later version.
-Ligbfor is distributed in the hope that it will be useful,
+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.
+GNU 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. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
-#include "config.h"
#include "libgfortran.h"
+
/* Use Binary Method to calculate the powi. This is not an optimal but
a simple and reasonable arithmetic. See section 4.6.3, "Evaluation of
Powers" of Donald E. Knuth, "Seminumerical Algorithms", Vol. 2, "The Art
of Computer Programming", 3rd Edition, 1998. */
+#if defined (HAVE_GFC_COMPLEX_8) && defined (HAVE_GFC_INTEGER_8)
+
GFC_COMPLEX_8 pow_c8_i8 (GFC_COMPLEX_8 a, GFC_INTEGER_8 b);
export_proto(pow_c8_i8);
pow_c8_i8 (GFC_COMPLEX_8 a, GFC_INTEGER_8 b)
{
GFC_COMPLEX_8 pow, x;
- GFC_INTEGER_8 n, u;
+ GFC_INTEGER_8 n;
+ GFC_UINTEGER_8 u;
n = b;
x = a;
if (n < 0)
{
- n = -n;
+ u = -n;
x = pow / x;
}
- u = n;
+ else
+ {
+ u = n;
+ }
for (;;)
{
if (u & 1)
}
return pow;
}
+
+#endif