1/* mpfr_setmax -- maximum representable floating-point number (raw version) 2 3Copyright 2002, 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4Contributed by the Arenaire and Cacao 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_setmax (mpfr_ptr x, mpfr_exp_t e) 29{ 30 mp_size_t xn, i; 31 int sh; 32 mp_limb_t *xp; 33 34 MPFR_SET_EXP (x, e); 35 xn = 1 + (MPFR_PREC(x) - 1) / GMP_NUMB_BITS; 36 sh = (mpfr_prec_t) xn * GMP_NUMB_BITS - MPFR_PREC(x); 37 xp = MPFR_MANT(x); 38 xp[0] = MP_LIMB_T_MAX << sh; 39 for (i = 1; i < xn; i++) 40 xp[i] = MP_LIMB_T_MAX; 41} 42