summaryrefslogblamecommitdiff
path: root/arch/arm64/lib/strchr.S
blob: 1f47eae3b0d6d618d24c347db7c2da9ffce98068 (plain) (tree) 
caab277b1de0 ^

2b8cac814cd5 ^





2b8cac814cd5 ^














3ac0f4526dfb ^

2b8cac814cd5 ^









3ac0f4526dfb ^

ac0e8c72b03b ^

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

                                           




                                       













                                                        
                           








                               
                    
                             
/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Based on arch/arm/lib/strchr.S
 *
 * Copyright (C) 1995-2000 Russell King
 * Copyright (C) 2013 ARM Ltd.
 */

#include <linux/linkage.h>
#include <asm/assembler.h>

/*
 * Find the first occurrence of a character in a string.
 *
 * Parameters:
 *	x0 - str
 *	x1 - c
 * Returns:
 *	x0 - address of first occurrence of 'c' or 0
 */
SYM_FUNC_START_WEAK(strchr)
	and	w1, w1, #0xff
1:	ldrb	w2, [x0], #1
	cmp	w2, w1
	ccmp	w2, wzr, #4, ne
	b.ne	1b
	sub	x0, x0, #1
	cmp	w2, w1
	csel	x0, x0, xzr, eq
	ret
SYM_FUNC_END(strchr)
EXPORT_SYMBOL_NOKASAN(strchr)