44 lines
1.4 KiB
ArmAsm
44 lines
1.4 KiB
ArmAsm
|
/* bzero -- set a block of memory to zero. IBM S390 version
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Copyright (C) 2000 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 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. */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* 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
|