1/* mpfr_ui_pow -- power of n function n^x
2
3Copyright 2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4Contributed by the AriC and Caramel projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include "mpfr-impl.h"
24
25int
26mpfr_ui_pow (mpfr_ptr y, unsigned long int n, mpfr_srcptr x, mpfr_rnd_t rnd_mode)
27{
28  mpfr_t t;
29  int inexact;
30  MPFR_SAVE_EXPO_DECL (expo);
31
32  MPFR_SAVE_EXPO_MARK (expo);
33  mpfr_init2 (t, sizeof(n) * CHAR_BIT);
34  inexact = mpfr_set_ui (t, n, MPFR_RNDN);
35  MPFR_ASSERTN (!inexact);
36  inexact = mpfr_pow (y, t, x, rnd_mode);
37  mpfr_clear (t);
38  MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
39  MPFR_SAVE_EXPO_FREE (expo);
40  return mpfr_check_range (y, inexact, rnd_mode);
41}
42