1 /* Round double value to 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, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include "math_private.h"
34 EXTRACT_WORDS (i0
, i1
, x
);
35 j0
= ((i0
>> 20) & 0x7ff) - 0x3ff;
36 sign
= (i0
& 0x80000000) != 0 ? -1 : 1;
43 return j0
< -1 ? 0 : sign
;
48 result
= i0
>> (20 - j0
);
51 else if (j0
< (int32_t) (8 * sizeof (long int)) - 1)
54 result
= ((long int) i0
<< (j0
- 20)) | (i1
<< (j0
- 52));
57 u_int32_t j
= i1
+ (0x80000000 >> (j0
- 20));
61 result
= ((long int) i0
<< (j0
- 20)) | (j
>> (52 - j0
));
66 /* The number is too large. It is left implementation defined
74 weak_alias (__lround
, lround
)
76 strong_alias (__lround
, __lroundl
)
77 weak_alias (__lround
, lroundl
)