blob: f972cf99f1b2d9e9c2257ac59a450be40698507f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/* Round argument to nearest integral value according to current rounding
direction.
Copyright (C) 1997-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
#include <libm-alias-float.h>
#include "mathimpl.h"
long long int
__llrintf (float x)
{
int32_t e;
uint32_t i, s;
long long int result;
x = __m81_u(__rintf) (x);
GET_FLOAT_WORD (i, x);
e = ((i >> 23) & 0xff) - 0x7f;
if (e < 0)
return 0;
s = i;
i &= 0x7fffff;
i |= 0x800000;
if (e < 63)
{
if (e > 55)
result = (long long int) (i << (e - 55)) << 32;
else if (e > 31)
result = (((long long int) (i >> (55 - e)) << 32) | (i << (e - 23)));
else if (e > 23)
result = i << (e - 23);
else
result = i >> (23 - e);
if (s & 0x80000000)
result = -result;
}
else
/* The number is too large or not finite. The standard leaves it
undefined what to return when the number is too large to fit in a
`long long int'. */
result = -1LL;
return result;
}
libm_alias_float (__llrint, llrint)
|
