1 /* Round long double value to long int.
2 Copyright (C) 1997-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
22 #include <math_private.h>
26 __lroundl (long double x)
33 GET_LDOUBLE_WORDS (se, i0, i1, x);
34 j0 = (se & 0x7fff) - 0x3fff;
35 sign = (se & 0x8000) != 0 ? -1 : 1;
40 return j0 < -1 ? 0 : sign;
43 u_int32_t j = i0 + (0x40000000 >> j0);
51 result = j >> (31 - j0);
54 else if (j0 < (int32_t) (8 * sizeof (long int)) - 1)
57 result = ((long int) i0 << (j0 - 31)) | (i1 << (j0 - 63));
60 u_int32_t j = i1 + (0x80000000 >> (j0 - 31));
65 result = (long int) i0;
67 result = ((long int) i0 << (j0 - 31)) | (j >> (63 - j0));
72 /* The number is too large. It is left implementation defined
80 weak_alias (__lroundl, lroundl)