blob: 7c03c3eb9d705e8d312a6a3c3d7c7bef2811615a (
plain)
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
|
/* bzero -- set a block of memory to zero. IBM S390 version
This file is part of the GNU C Library.
Copyright (C) 2000-2015 Free Software Foundation, Inc.
Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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/>. */
/*
* R2 = address to memory area
* R3 = number of bytes to fill
*/
#include "sysdep.h"
#include "asm-syntax.h"
.text
ENTRY(__bzero)
ltr %r3,%r3
jz .L1
sr %r1,%r1 # set pad byte to zero
sr %r4,%r4 # no source for MVCLE, only a pad byte
sr %r5,%r5
.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
jo .L0
.L1: br %r14
END(__bzero)
#ifndef NO_WEAK_ALIAS
weak_alias (__bzero, bzero)
#endif
|
