1 /* Round argument to nearest integral value according to current rounding
3 Copyright (C) 1997-2015 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
23 #include <math_private.h>
25 static const long double two63
[2] =
27 9.223372036854775808000000e+18, /* 0x403E, 0x00000000, 0x00000000 */
28 -9.223372036854775808000000e+18 /* 0xC03E, 0x00000000, 0x00000000 */
33 __llrintl (long double x
)
38 volatile long double w
;
42 GET_LDOUBLE_WORDS (se
, i0
, i1
, x
);
45 j0
= (se
& 0x7fff) - 0x3fff;
47 if (j0
< (int32_t) (8 * sizeof (long long int)) - 1)
50 result
= (((long long int) i0
<< 32) | i1
) << (j0
- 63);
55 GET_LDOUBLE_WORDS (se
, i0
, i1
, t
);
56 j0
= (se
& 0x7fff) - 0x3fff;
61 result
= i0
>> (31 - j0
);
63 result
= ((long long int) i0
<< (j0
- 31)) | (i1
>> (63 - j0
));
68 /* The number is too large. It is left implementation defined
70 return (long long int) x
;
73 return sx
? -result
: result
;
76 weak_alias (__llrintl
, llrintl
)