gcc/realmpfr.h

   1 /* Definitions of floating-point conversion from compiler
   2    internal format to MPFR.
   3    Copyright (C) 2010-2023 Free Software Foundation, Inc.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 3, or (at your option) any later
  10    version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_REALGMP_H
  22 #define GCC_REALGMP_H
  23
  24 #include <mpfr.h>
  25 #include <mpc.h>
  26
  27 class auto_mpfr
  28 {
  29 public:
  30   auto_mpfr () { mpfr_init (m_mpfr); }
  31   explicit auto_mpfr (mpfr_prec_t prec) { mpfr_init2 (m_mpfr, prec); }
  32   ~auto_mpfr () { mpfr_clear (m_mpfr); }
  33
  34   operator mpfr_t& () { return m_mpfr; }
  35   mpfr_ptr operator-> () { return m_mpfr; }
  36
  37   auto_mpfr (const auto_mpfr &) = delete;
  38   auto_mpfr &operator= (const auto_mpfr &) = delete;
  39
  40 #if GCC_VERSION < 4008 || GCC_VERSION >= 5000
  41   /* GCC 4.8 and 4.9 don't support this, only fixed in PR62101 for 5.0.  */
  42   friend void mpfr_clear (auto_mpfr&) = delete;
  43   friend void mpfr_init (auto_mpfr&) = delete;
  44   friend void mpfr_init2 (auto_mpfr&, mpfr_prec_t) = delete;
  45 #endif
  46
  47 private:
  48   mpfr_t m_mpfr;
  49 };
  50
  51 /* Convert between MPFR and REAL_VALUE_TYPE.  The caller is
  52    responsible for initializing and clearing the MPFR parameter.  */
  53
  54 extern void real_from_mpfr (REAL_VALUE_TYPE *, mpfr_srcptr, tree, mpfr_rnd_t);
  55 extern void real_from_mpfr (REAL_VALUE_TYPE *, mpfr_srcptr,
  56                             const real_format *, mpfr_rnd_t);
  57 extern void mpfr_from_real (mpfr_ptr, const REAL_VALUE_TYPE *, mpfr_rnd_t);
  58
  59 #endif /* ! GCC_REALGMP_H */