#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "realmpfr.h"
#include "tree.h"

Include dependency graph for realmpfr.c:

Functions
void	mpfr_from_real ()
void	real_from_mpfr ()

Function Documentation

void mpfr_from_real ( )

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

GCC 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 General Public License for more details.

You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see http://www.gnu.org/licenses/. Convert from REAL_VALUE_TYPE to MPFR. The caller is responsible for initializing and clearing the MPFR parameter.

 We use a string as an intermediate type.

 Take care of Infinity and NaN.

 mpfr_set_str() parses hexadecimal floats from strings in the same
 format that GCC will output them.  Nothing extra is needed.

Referenced by fold_builtin_sprintf_chk_1(), and fold_builtin_strncat_chk().

void real_from_mpfr ( )

Convert from MPFR to REAL_VALUE_TYPE, for a given type TYPE and rounding mode RNDMODE. TYPE is only relevant if M is a NaN.

 We use a string as an intermediate type.

 Take care of Infinity and NaN.

 The additional 12 chars add space for the sprintf below.  This
 leaves 6 digits for the exponent which is supposedly enough.

 REAL_VALUE_ATOF expects the exponent for mantissa * 2**exp,
 mpfr_get_str returns the exponent for mantissa * 16**exp, adjust
 for that.

References real_inf(), and real_value_negate().

Referenced by decimal_from_integer().

Functions

Function Documentation