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

   1/*
   2 *  linux/arch/arm/lib/strchr.S
   3 *
   4 *  Copyright (C) 1995-2000 Russell King
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 *
  10 *  ASM optimised string functions
  11 */
  12#include <linux/linkage.h>
  13#include <asm/assembler.h>
  14
  15                .text
  16                .align  5
  17ENTRY(strchr)
  18                and     r1, r1, #0xff
  191:              ldrb    r2, [r0], #1
  20                teq     r2, r1
  21                teqne   r2, #0
  22                bne     1b
  23                teq     r2, r1
  24                movne   r0, #0
  25                subeq   r0, r0, #1
  26                mov     pc, lr
  27ENDPROC(strchr)
  28