1/* mpfr_setmin -- minimum representable floating-point number (raw version)
2
3Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
4Contributed by the AriC and Caramel projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#include "mpfr-impl.h"
24
25/* Note: the flags are not cleared and the current sign is kept. */
26
27void
28mpfr_setmin (mpfr_ptr x, mpfr_exp_t e)
29{
30  mp_size_t xn;
31  mp_limb_t *xp;
32
33  MPFR_SET_EXP (x, e);
34  xn = (MPFR_PREC(x) - 1) / GMP_NUMB_BITS;
35  xp = MPFR_MANT(x);
36  xp[xn] = MPFR_LIMB_HIGHBIT;
37  MPN_ZERO(xp, xn);
38}
39