arch/arm/lib/memchr.S

   1 /*
   2  *  linux/arch/arm/lib/memchr.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
  17 ENTRY(memchr)
  18 1:      subs    r2, r2, #1
  19         bmi     2f
  20         ldrb    r3, [r0], #1
  21         teq     r3, r1
  22         bne     1b
  23         sub     r0, r0, #1
  24 2:      movne   r0, #0
  25         RETINSTR(mov,pc,lr)