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
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/* See the import.pl script for potential modifications */
/* Round argument to nearest integral value according to current rounding
direction.
Copyright (C) 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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 2.1f 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include "SMath.h"
#include "math_private.h"
static const Simple two23[2] =
{
8.3886080000e+06f, /* 0x4B000000 */
-8.3886080000e+06f, /* 0xCB000000 */
};
long int
__lrintf (Simple x)
{
int32_t j0;
u_int32_t i0;
Simple w;
Simple t;
long int result;
int sx;
GET_FLOAT_WORD (i0, x);
sx = i0 >> 31;
j0 = ((i0 >> 23) & 0xff) - 0x7f;
i0 &= 0x7fffff;
i0 |= 0x800000;
if (j0 < (int32_t) (sizeof (long int) * 8) - 1)
{
if (j0 < -1)
return 0;
else if (j0 >= 23)
result = (long int) i0 << (j0 - 23);
else
{
w = two23[sx] + x;
t = w - two23[sx];
GET_FLOAT_WORD (i0, t);
j0 = ((i0 >> 23) & 0xff) - 0x7f;
i0 &= 0x7fffff;
i0 |= 0x800000;
result = i0 >> (23 - j0);
}
}
else
{
/* The number is too large. It is left implementation defined
what happens. */
return (long int) x;
}
return sx ? -result : result;
}
weak_alias (__lrintf, lrintf)
|
