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
|
/* Search a character in a block of memory. 31/64 bit S/390 version.
Copyright (C) 2001-2019 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
/* INPUT PARAMETERS
%r2 = address to memory area
%r3 = character to find
%r4 = number of bytes to search. */
#include <ifunc-memchr.h>
#include "sysdep.h"
#include "asm-syntax.h"
#if HAVE_MEMCHR_Z900_G5
# if defined __s390x__
# define SLGR slgr
# define LGHI lghi
# define NGR ngr
# define LGR lgr
# else
# define SLGR slr
# define LGHI lhi
# define NGR nr
# define LGR lr
# endif /* ! defined __s390x__ */
.text
ENTRY(MEMCHR_Z900_G5)
LGHI %r0,0xff
NGR %r0,%r3
LGR %r1,%r2
la %r2,0(%r4,%r1)
0: srst %r2,%r1
jo 0b
brc 13,1f
SLGR %r2,%r2
1: br %r14
END(MEMCHR_Z900_G5)
# if ! HAVE_MEMCHR_IFUNC
strong_alias (MEMCHR_Z900_G5, __memchr)
weak_alias (__memchr, memchr)
# endif
# if defined SHARED && IS_IN (libc)
strong_alias (MEMCHR_Z900_G5, __GI_memchr)
# endif
#endif
|
