| 12345678910111213141516171819202122232425262728293031323334 |
- /* 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(__pi_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(__pi_strchr)
- SYM_FUNC_ALIAS_WEAK(strchr, __pi_strchr)
- EXPORT_SYMBOL_NOKASAN(strchr)
|
