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/* mpfr_cmp_d -- compare a floating-point number with a long double
Copyright 2004, 2006-2015 Free Software Foundation, Inc.
Contributed by the AriC and Caramel projects, INRIA.
This file is part of the GNU MPFR Library.
The GNU 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 3 of the License, or (at your
option) any later version.
The GNU 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 GNU MPFR Library; see the file COPYING.LESSER. If not, see
http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-impl.h"
int
mpfr_cmp_ld (mpfr_srcptr b, long double d)
{
mpfr_t tmp;
int res;
mpfr_init2 (tmp, MPFR_LDBL_MANT_DIG);
res = mpfr_set_ld (tmp, d, MPFR_RNDN);
if (res != 0) /* can happen when "long double" is double-double */
{
/* since the smallest value is 2^(-1074) and the largest is
< 2^1024, every double-double is exactly representable with
1024 + 1074 bits */
mpfr_set_prec (tmp, 1024 + 1074);
res = mpfr_set_ld (tmp, d, MPFR_RNDN);
}
MPFR_ASSERTD (res == 0);
res = mpfr_cmp (b, tmp);
mpfr_clear (tmp);
return res;
}
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