LXR linux/arch/arm/lib/strchr.S

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *  linux/arch/arm/lib/strchr.S
   4 *
   5 *  Copyright (C) 1995-2000 Russell King
   6 *
   7 *  ASM optimised string functions
   8 */
   9#include <linux/linkage.h>
  10#include <asm/assembler.h>
  11
  12                .text
  13                .align  5
  14ENTRY(strchr)
  15                and     r1, r1, #0xff
  161:              ldrb    r2, [r0], #1
  17                teq     r2, r1
  18                teqne   r2, #0
  19                bne     1b
  20                teq     r2, r1
  21                movne   r0, #0
  22                subeq   r0, r0, #1
  23                ret     lr
  24ENDPROC(strchr)
  25