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