mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-19 09:20:07 +00:00
68 lines
1.8 KiB
ArmAsm
68 lines
1.8 KiB
ArmAsm
|
/* Copyright (C) 1998 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by Philip Blundell <philb@gnu.org>
|
||
|
|
|
||
|
|
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. */
|
||
|
|
|
||
|
|
#include <sysdep.h>
|
||
|
|
|
||
|
|
/* void *memset (dstpp, c, len) */
|
||
|
|
|
||
|
|
ENTRY(memset)
|
||
|
|
mov a4, a1
|
||
|
|
cmp a3, $8 @ at least 8 bytes to do?
|
||
|
|
blt 2f
|
||
|
|
orr a2, a2, a2, lsl $8
|
||
|
|
orr a2, a2, a2, lsl $16
|
||
|
|
1:
|
||
|
|
tst a4, $3 @ aligned yet?
|
||
|
|
strneb a2, [a4], $1
|
||
|
|
subne a3, a3, $1
|
||
|
|
bne 1b
|
||
|
|
mov ip, a2
|
||
|
|
1:
|
||
|
|
cmp a3, $8 @ 8 bytes still to do?
|
||
|
|
blt 2f
|
||
|
|
stmia a4!, {a2, ip}
|
||
|
|
sub a3, a3, $8
|
||
|
|
cmp a3, $8 @ 8 bytes still to do?
|
||
|
|
blt 2f
|
||
|
|
stmia a4!, {a2, ip}
|
||
|
|
sub a3, a3, $8
|
||
|
|
cmp a3, $8 @ 8 bytes still to do?
|
||
|
|
blt 2f
|
||
|
|
stmia a4!, {a2, ip}
|
||
|
|
sub a3, a3, $8
|
||
|
|
cmp a3, $8 @ 8 bytes still to do?
|
||
|
|
stmgeia a4!, {a2, ip}
|
||
|
|
subge a3, a3, $8
|
||
|
|
bge 1b
|
||
|
|
2:
|
||
|
|
movs a3, a3 @ anything left?
|
||
|
|
RETINSTR(moveq,pc,lr) @ nope
|
||
|
|
rsb a3, a3, $7
|
||
|
|
add pc, pc, a3, lsl $2
|
||
|
|
mov r0, r0
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
strb a2, [a4], $1
|
||
|
|
RETINSTR(mov,pc,lr)
|
||
|
|
END(memset)
|