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
|
/* Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <math.h>
double
__ceil (double x)
{
if (x != 0 && fabs (x) < 9007199254740992.0) /* 1 << DBL_MANT_DIG */
{
double tmp1;
unsigned long fpcr0, fpcr1;
unsigned long pinf = 3UL << 58;
/* Set round to +inf. */
__asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr0));
__asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0 | pinf));
/* Calculate! */
#ifdef _IEEE_FP_INEXACT
__asm("cvttq/svid %2,%1\n\tcvtqt/suid %1,%0"
: "=f"(x), "=&f"(tmp1)
: "f"(x));
#else
__asm("cvttq/svd %2,%1\n\tcvtqt/d %1,%0"
: "=f"(x), "=&f"(tmp1)
: "f"(x));
#endif
/* Reset rounding mode, while retaining new exception bits. */
__asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr1));
fpcr0 = (fpcr0 & pinf) | (fpcr1 & ~pinf);
__asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0));
}
return x;
}
weak_alias (__ceil, ceil)
#ifdef NO_LONG_DOUBLE
strong_alias (__ceil, __ceill)
weak_alias (__ceil, ceill)
#endif
|
