1 /* mpfr_frexp -- convert to integral and fractional parts
3 Copyright 2011-2015 Free Software Foundation, Inc.
4 Contributed by the AriC and Caramel projects, INRIA.
6 This file is part of the GNU MPFR Library.
8 The GNU MPFR Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or (at your
11 option) any later version.
13 The GNU MPFR Library is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
16 License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
23 #include "mpfr-impl.h"
26 mpfr_frexp (mpfr_exp_t
*exp
, mpfr_ptr y
, mpfr_srcptr x
, mpfr_rnd_t rnd
)
30 if (MPFR_UNLIKELY(MPFR_IS_SINGULAR(x
)))
35 MPFR_RET_NAN
; /* exp is unspecified */
37 else if (MPFR_IS_INF(x
))
40 MPFR_SET_SAME_SIGN(y
,x
);
41 MPFR_RET(0); /* exp is unspecified */
46 MPFR_SET_SAME_SIGN(y
,x
);
52 inex
= mpfr_set (y
, x
, rnd
);
53 *exp
= MPFR_GET_EXP (y
);
55 return mpfr_check_range (y
, inex
, rnd
);