1 /* Round long 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 Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 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 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
23 #include "math_private.h"
27 __llroundl (long double x
)
34 GET_LDOUBLE_WORDS (se
, i0
, i1
, x
);
35 j0
= (se
& 0x7fff) - 0x3fff;
36 sign
= (se
& 0x8000) != 0 ? -1 : 1;
41 return j0
< -1 ? 0 : sign
;
44 u_int32_t j
= i0
+ (0x40000000 >> j0
);
52 result
= j
>> (31 - j0
);
55 else if (j0
< (int32_t) (8 * sizeof (long long int)))
58 result
= ((long long int) i0
<< (j0
- 31)) | (i1
<< (j0
- 63));
61 u_int32_t j
= i1
+ (0x80000000 >> (j0
- 31));
65 result
= ((long long int) i0
<< (j0
- 31)) | (j
>> (63 - j0
));
70 /* The number is too large. It is left implementation defined
72 return (long long int) x
;
78 weak_alias (__llroundl
, llroundl
)