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
  17 ENTRY(strchr)
  18                 and     r1, r1, #0xff
  19 1:              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
  27 ENDPROC(strchr)