1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* Copyright (c) 2015 ARM Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the company may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "acle-compat.h"
.thumb
.syntax unified
.global __aeabi_memmove
.type __aeabi_memmove, %function
ASM_ALIAS __aeabi_memmove4 __aeabi_memmove
ASM_ALIAS __aeabi_memmove8 __aeabi_memmove
__aeabi_memmove:
push {r4, lr}
cmp r0, r1
bls 3f
adds r4, r1, r2
cmp r0, r4
bcs 3f
subs r3, r2, #1
cmp r2, #0
beq 2f
subs r2, r4, r2
1:
ldrb r1, [r2, r3]
strb r1, [r0, r3]
subs r3, r3, #1
bcs 1b
2:
#if __ARM_ARCH >= 5
pop {r4, pc}
#else
pop {r4}
pop {r1}
bx r1
#endif
3:
movs r3, #0
cmp r2, #0
beq 2b
4:
ldrb r4, [r1, r3]
strb r4, [r0, r3]
adds r3, r3, #1
cmp r2, r3
bne 4b
b 2b
.size __aeabi_memmove, . - __aeabi_memmove
|
