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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 *strrchr(const char *s, int c) */
SYM_FUNC_START(strrchr)
/*
* Parameters
* a0 - The string to be searched
* a1 - The character to seaerch for
*
* Returns
* a0 - Address of last occurrence of 'c' or 0
*
* Clobbers
* t0, t1
*/
andi a1, a1, 0xff
mv t1, a0
li a0, 0
1:
lbu t0, 0(t1)
bne t0, a1, 2f
mv a0, t1
2:
addi t1, t1, 1
bnez t0, 1b
ret
SYM_FUNC_END(strrchr)
SYM_FUNC_ALIAS_WEAK(__pi_strrchr, strrchr)
EXPORT_SYMBOL(strrchr)
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