mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-20 12:00:06 +00:00
42 lines
1.5 KiB
ArmAsm
42 lines
1.5 KiB
ArmAsm
|
/* Set a block of memory to some byte value. For IBM S390
|
||
|
|
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 destination memory area
|
||
|
|
* R3 = address to source memory area
|
||
|
|
* R4 = number of bytes to copy
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "sysdep.h"
|
||
|
|
#include "asm-syntax.h"
|
||
|
|
|
||
|
|
.text
|
||
|
|
ENTRY(memcpy)
|
||
|
|
ltr %r5,%r4
|
||
|
|
jz .L1
|
||
|
|
lr %r4,%r3 # %r4/%r5 = source ptr/len
|
||
|
|
lr %r3,%r5 # %r2/%r3 = dest ptr/len
|
||
|
|
lr %r0,%r2 # save source address
|
||
|
|
.L0: mvcle %r2,%r4,0 # thats it, MVCLE is your friend
|
||
|
|
jo .L0
|
||
|
|
lr %r2,%r0 # return value is source address
|
||
|
|
.L1:
|
||
|
|
br %r14
|
||
|
|
END(memset)
|