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
|
/* Truncate argument to nearest integral value not larger than the argument.
Copyright (C) 1997, 1999 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 2.1 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <math.h>
#include "math_private.h"
long double
__truncl (long double x)
{
int32_t i0, j0;
u_int32_t se, i1;
int sx;
GET_LDOUBLE_WORDS (se, i0, i1, x);
sx = se & 0x8000;
j0 = (se & 0x7fff) - 0x3fff;
if (j0 < 31)
{
if (j0 < 0)
/* The magnitude of the number is < 1 so the result is +-0. */
SET_LDOUBLE_WORDS (x, sx, 0, 0);
else
SET_LDOUBLE_WORDS (x, se, i0 & ~(0x7fffffff >> j0), 0);
}
else if (j0 > 63)
{
if (j0 == 0x4000)
/* x is inf or NaN. */
return x + x;
}
else
{
SET_LDOUBLE_WORDS (x, se, i0, i1 & ~(0xffffffffu >> (j0 - 31)));
}
return x;
}
weak_alias (__truncl, truncl)
|
