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42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
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/* mpfr_ui_pow -- power of n function n^x
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Copyright 2001, 2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.
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Contributed by the Arenaire and Cacao projects, INRIA.
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This file is part of the MPFR Library.
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The MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the MPFR Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "mpfr-impl.h"
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int
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mpfr_ui_pow (mpfr_ptr y, unsigned long int n, mpfr_srcptr x, mp_rnd_t rnd_mode)
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{
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mpfr_t t;
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int inexact;
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MPFR_SAVE_EXPO_DECL (expo);
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MPFR_SAVE_EXPO_MARK (expo);
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mpfr_init2 (t, sizeof(n) * CHAR_BIT);
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inexact = mpfr_set_ui (t, n, GMP_RNDN);
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MPFR_ASSERTN (!inexact);
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inexact = mpfr_pow (y, t, x, rnd_mode);
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mpfr_clear (t);
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MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
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MPFR_SAVE_EXPO_FREE (expo);
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return mpfr_check_range (y, inexact, rnd_mode);
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}
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