buildtools/gcc/mpfr/ui_pow.c
Michael Lotz 99d8158635 Adding inline mpfr directory so the MPFR library is built as part of GCC 4.3.
git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@29042 a95241bf-73f2-0310-859d-f6bbb57e9c96
2009-01-26 05:56:19 +00:00

42 lines
1.4 KiB
C

/* mpfr_ui_pow -- power of n function n^x
Copyright 2001, 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
Contributed by the Arenaire and Cacao projects, INRIA.
This file is part of the MPFR Library.
The MPFR Library 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.
The MPFR Library 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 the MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "mpfr-impl.h"
int
mpfr_ui_pow (mpfr_ptr y, unsigned long int n, mpfr_srcptr x, mp_rnd_t rnd_mode)
{
mpfr_t t;
int inexact;
MPFR_SAVE_EXPO_DECL (expo);
MPFR_SAVE_EXPO_MARK (expo);
mpfr_init2 (t, sizeof(n) * CHAR_BIT);
inexact = mpfr_set_ui (t, n, GMP_RNDN);
MPFR_ASSERTN (!inexact);
inexact = mpfr_pow (y, t, x, rnd_mode);
mpfr_clear (t);
MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
MPFR_SAVE_EXPO_FREE (expo);
return mpfr_check_range (y, inexact, rnd_mode);
}