1 /* Round double to integer away from zero.
2 Copyright (C) 1997-2017 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>
31 EXTRACT_WORDS64 (i0
, x
);
32 j0
= ((i0
>> 52) & 0x7ff) - 0x3ff;
33 if (__glibc_likely (j0
< 52))
37 i0
&= UINT64_C(0x8000000000000000);
39 i0
|= UINT64_C(0x3ff0000000000000);
43 uint64_t i
= UINT64_C(0x000fffffffffffff) >> j0
;
48 i0
+= UINT64_C(0x0008000000000000) >> j0
;
61 INSERT_WORDS64 (x
, i0
);
64 weak_alias (__round
, round
)
66 strong_alias (__round
, __roundl
)
67 weak_alias (__round
, roundl
)