mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
89 lines
1.7 KiB
ArmAsm
89 lines
1.7 KiB
ArmAsm
/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
|
|
Optimized by Toshiyasu Morita <toshiyasu.morita@hsa.hitachi.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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
/* void *memset (t, c, len); */
|
|
|
|
ENTRY(memset)
|
|
mov #12,r0
|
|
cmp/gt r6,r0
|
|
bt.s L_byte_loop_init
|
|
mov r4,r7
|
|
|
|
extu.b r5,r5
|
|
swap.b r5,r1
|
|
or r1,r5
|
|
swap.w r5,r1
|
|
or r1,r5
|
|
|
|
mov r4,r0
|
|
tst #1,r0
|
|
bt L_wordalign
|
|
|
|
mov.b r5,@r4
|
|
add #-1,r6
|
|
add #1,r4
|
|
mov r4,r0
|
|
|
|
.balignw 4,0x0009
|
|
L_wordalign:
|
|
tst #2,r0
|
|
bt L_word_loop_init
|
|
|
|
mov.w r5,@r4
|
|
add #-2,r6
|
|
add #2,r4
|
|
mov r4,r0
|
|
|
|
.balignw 4,0x0009
|
|
L_word_loop_init:
|
|
mov r6,r3
|
|
shlr2 r3
|
|
mov #7,r0
|
|
shlr r3
|
|
and r0,r6
|
|
|
|
.balignw 4,0x0009
|
|
L_2word_loop:
|
|
mov.l r5,@r4
|
|
dt r3
|
|
mov.l r5,@(4,r4)
|
|
bf.s L_2word_loop
|
|
add #8,r4
|
|
|
|
.balignw 4,0x0009
|
|
L_byte_loop_init:
|
|
tst r6,r6
|
|
bt L_byte_exit
|
|
|
|
.balignw 4,0x0009
|
|
L_byte_loop:
|
|
mov.b r5,@r4
|
|
dt r6
|
|
bf.s L_byte_loop
|
|
add #1,r4
|
|
|
|
.balignw 4,0x0009
|
|
L_byte_exit:
|
|
rts
|
|
mov r7,r0
|
|
END(memset)
|
|
libc_hidden_builtin_def (memset)
|