1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 /*
4 * memcmp for PowerPC32
5 *
6 * Copyright (C) 1996 Paul Mackerras.
7 *
8 */
9
10 #include <linux/export.h>
11 #include <asm/ppc_asm.h>
12
13 .text
14
15 _GLOBAL(memcmp)
16 srawi. r7, r5, 2 /* Div
17 mr r6, r3
18 beq- 3f
19 mtctr r7
20 li r7, 0
21 1: lwzx r3, r6, r7
22 lwzx r0, r4, r7
23 addi r7, r7, 4
24 cmplw cr0, r3, r0
25 bdnzt eq, 1b
26 bne 5f
27 3: andi. r3, r5, 3
28 beqlr
29 cmplwi cr1, r3, 2
30 blt- cr1, 4f
31 lhzx r3, r6, r7
32 lhzx r0, r4, r7
33 addi r7, r7, 2
34 subf. r3, r0, r3
35 beqlr cr1
36 bnelr
37 4: lbzx r3, r6, r7
38 lbzx r0, r4, r7
39 subf. r3, r0, r3
40 blr
41 5: li r3, 1
42 bgtlr
43 li r3, -1
44 blr
45 EXPORT_SYMBOL(memcmp)
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