80 lines
1.6 KiB
ArmAsm
80 lines
1.6 KiB
ArmAsm
/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
|
|
|
|
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 (t, c, len) */
|
|
|
|
ENTRY(memset)
|
|
tst r6, r6
|
|
bt/s end
|
|
mov r4, r3
|
|
mov #3, r0
|
|
cmp/hs r6, r0
|
|
bt/s 2f
|
|
and r4, r0
|
|
tst r0, r0
|
|
bt/s 1f
|
|
add r0, r6
|
|
add #-1, r0
|
|
shll2 r0
|
|
braf r0
|
|
add #-4, r6
|
|
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
1:
|
|
extu.b r5, r0
|
|
shll8 r5
|
|
or r5, r0
|
|
extu.w r0, r0
|
|
mov r0, r5
|
|
swap.w r5, r5
|
|
or r0, r5
|
|
|
|
2:
|
|
add #-4, r6
|
|
cmp/pz r6
|
|
bf afew
|
|
mov.l r5, @r4
|
|
bra 2b
|
|
add #4, r4
|
|
|
|
afew:
|
|
mov #-1, r0
|
|
sub r6, r0
|
|
shll2 r0
|
|
braf r0
|
|
nop
|
|
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
mov.b r5, @r4
|
|
add #1, r4
|
|
end:
|
|
rts
|
|
mov r3, r0
|
|
END(memset)
|