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
|
/* Round to int floating-point values. PowerPC64 version.
Copyright (C) 2011-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Adhemerval Zanella <azanella@br.ibm.com>, 2011
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/>. */
/* This has been coded in assembler because GCC makes such a mess of it
when it's coded in C. */
#include <sysdep.h>
#include <math_ldbl_opt.h>
/* double [fp1] nearbyint(double [fp1] x) */
.section ".toc","aw"
.LC0: /* 2**52 */
.tc FD_43300000_0[TC],0x4330000000000000
.section ".text"
EALIGN (__nearbyint, 4, 0)
CALL_MCOUNT 0
fabs fp0,fp1
lfd fp13,.LC0@toc(2)
fcmpu cr7,fp0,fp13 /* if (fabs(x) > TWO52) */
bgelr cr7
fsub fp12,fp13,fp13 /* generate 0.0 */
fcmpu cr7,fp1,fp12 /* if (x > 0.0) */
ble cr7, L(lessthanzero)
mtfsb0 4*cr7+lt /* Disable FE_INEXACT exception */
fadd fp1,fp1,fp13 /* x+= TWO52 */
fsub fp1,fp1,fp13 /* x-= TWO52 */
fabs fp1,fp1 /* if (x == 0.0) */
mtfsb0 4*cr1+eq /* Clear any FE_INEXACT exception */
blr /* x = 0.0; */
L(lessthanzero):
bgelr cr7 /* if (x < 0.0) */
mtfsb0 4*cr7+lt
fsub fp1,fp1,fp13 /* x -= TWO52 */
fadd fp1,fp1,fp13 /* x += TWO52 */
fnabs fp1,fp1 /* if (x == 0.0) */
mtfsb0 4*cr1+eq
blr /* x = -0.0; */
END (__nearbyint)
weak_alias (__nearbyint, nearbyint)
#ifdef NO_LONG_DOUBLE
weak_alias (__nearbyint, nearbyint)
strong_alias (__nearbyint, __nearbyintl)
#endif
#if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
compat_symbol (libm, __nearbyint, nearbyintl, GLIBC_2_1)
#endif
|
