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
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* memcmp for PowerPC32
*
* Copyright (C) 1996 Paul Mackerras.
*
*/
#include <asm/ppc_asm.h>
#include <asm/export.h>
.text
_GLOBAL(memcmp)
srawi. r7, r5, 2 /* Divide len by 4 */
mr r6, r3
beq- 3f
mtctr r7
li r7, 0
1: lwzx r3, r6, r7
lwzx r0, r4, r7
addi r7, r7, 4
cmplw cr0, r3, r0
bdnzt eq, 1b
bne 5f
3: andi. r3, r5, 3
beqlr
cmplwi cr1, r3, 2
blt- cr1, 4f
lhzx r3, r6, r7
lhzx r0, r4, r7
addi r7, r7, 2
subf. r3, r0, r3
beqlr cr1
bnelr
4: lbzx r3, r6, r7
lbzx r0, r4, r7
subf. r3, r0, r3
blr
5: li r3, 1
bgtlr
li r3, -1
blr
EXPORT_SYMBOL(memcmp)
|
