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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2025 Feng Jiang <jiangfeng@kylinos.cn>
*/
#include <linux/linkage.h>
#include <asm/asm.h>
/* char *strchr(const char *s, int c) */
SYM_FUNC_START(strchr)
/*
* Parameters
* a0 - The string to be searched
* a1 - The character to search for
*
* Returns
* a0 - Address of first occurrence of 'c' or 0
*
* Clobbers
* t0
*/
andi a1, a1, 0xff
1:
lbu t0, 0(a0)
beq t0, a1, 2f
addi a0, a0, 1
bnez t0, 1b
li a0, 0
2:
ret
SYM_FUNC_END(strchr)
SYM_FUNC_ALIAS_WEAK(__pi_strchr, strchr)
EXPORT_SYMBOL(strchr)
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