1 /* Round double value to long long int.
2 Copyright (C) 1997 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/>. */
21 #include "math_private.h"
31 EXTRACT_WORDS (i0, i1, x);
32 _j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
33 sign = (i0 & 0x80000000) != 0 ? -1 : 1;
40 return _j0 < -1 ? 0 : sign;
45 result = i0 >> (20 - _j0);
48 else if (_j0 < (int32_t) (8 * sizeof (long long int)) - 1)
51 result = (((long long int) i0 << 32) | i1) << (_j0 - 52);
54 u_int32_t j = i1 + (0x80000000 >> (_j0 - 20));
59 result = (long long int) i0;
61 result = ((long long int) i0 << (_j0 - 20)) | (j >> (52 - _j0));
66 /* The number is too large. It is left implementation defined
68 return (long long int) x;
73 libm_hidden_def(llround)