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| /* 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)
|
|
