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      1 /* mpfr_div_d -- divide a multiple precision floating-point number
      2                  by a machine double precision float
      3 
      4 Copyright 2007-2023 Free Software Foundation, Inc.
      5 Contributed by the AriC and Caramba projects, INRIA.
      6 
      7 This file is part of the GNU MPFR Library.
      8 
      9 The GNU MPFR Library is free software; you can redistribute it and/or modify
     10 it under the terms of the GNU Lesser General Public License as published by
     11 the Free Software Foundation; either version 3 of the License, or (at your
     12 option) any later version.
     13 
     14 The GNU MPFR Library is distributed in the hope that it will be useful, but
     15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
     16 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
     17 License for more details.
     18 
     19 You should have received a copy of the GNU Lesser General Public License
     20 along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
     21 https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
     22 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
     23 
     24 #include "mpfr-impl.h"
     25 
     26 int
     27 mpfr_div_d (mpfr_ptr a, mpfr_srcptr b, double c, mpfr_rnd_t rnd_mode)
     28 {
     29   int inexact;
     30   mpfr_t d;
     31   mp_limb_t tmp_man[MPFR_LIMBS_PER_DOUBLE];
     32   MPFR_SAVE_EXPO_DECL (expo);
     33 
     34   MPFR_LOG_FUNC (
     35     ("b[%Pd]=%.*Rg c%.20g rnd=%d", mpfr_get_prec (b), mpfr_log_prec, b, c,
     36      rnd_mode),
     37     ("a[%Pd]=%.*Rg", mpfr_get_prec (a), mpfr_log_prec, a));
     38 
     39   MPFR_SAVE_EXPO_MARK (expo);
     40 
     41   MPFR_TMP_INIT1(tmp_man, d, IEEE_DBL_MANT_DIG);
     42   inexact = mpfr_set_d (d, c, rnd_mode);
     43   MPFR_ASSERTD (inexact == 0);
     44 
     45   MPFR_CLEAR_FLAGS ();
     46   inexact = mpfr_div (a, b, d, rnd_mode);
     47   MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
     48 
     49   MPFR_SAVE_EXPO_FREE (expo);
     50   return mpfr_check_range (a, inexact, rnd_mode);
     51 }
     52