1 /* Truncate argument to nearest integral value not larger than the argument.
2 Copyright (C) 1997-2015 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 sx
= i0
& UINT64_C(0x8000000000000000);
33 j0
= ((i0
>> 52) & 0x7ff) - 0x3ff;
37 /* The magnitude of the number is < 1 so the result is +-0. */
38 INSERT_WORDS64 (x
, sx
);
40 INSERT_WORDS64 (x
, sx
| (i0
& ~(UINT64_C(0x000fffffffffffff) >> j0
)));
45 /* x is inf or NaN. */
51 weak_alias (__trunc
, trunc
)
53 strong_alias (__trunc
, __truncl
)
54 weak_alias (__trunc
, truncl
)