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| /* SPDX-License-Identifier: GPL-2.0-only */
| /*
| * Based on arch/arm/lib/memchr.S
| *
| * Copyright (C) 1995-2000 Russell King
| * Copyright (C) 2013 ARM Ltd.
| */
|
| #include <linux/linkage.h>
| #include <asm/assembler.h>
|
| /*
| * Find a character in an area of memory.
| *
| * Parameters:
| * x0 - buf
| * x1 - c
| * x2 - n
| * Returns:
| * x0 - address of first occurrence of 'c' or 0
| */
| SYM_FUNC_START_WEAK_PI(memchr)
| and w1, w1, #0xff
| 1: subs x2, x2, #1
| b.mi 2f
| ldrb w3, [x0], #1
| cmp w3, w1
| b.ne 1b
| sub x0, x0, #1
| ret
| 2: mov x0, #0
| ret
| SYM_FUNC_END_PI(memchr)
| EXPORT_SYMBOL_NOKASAN(memchr)
|
|
