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kernel/linux-imx6_3.14.28/arch/arm/lib/strrchr.S 533 Bytes
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  /*
   *  linux/arch/arm/lib/strrchr.S
   *
   *  Copyright (C) 1995-2000 Russell King
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   *  ASM optimised string functions
   */
  #include <linux/linkage.h>
  #include <asm/assembler.h>
  
  		.text
  		.align	5
  ENTRY(strrchr)
  		mov	r3, #0
  1:		ldrb	r2, [r0], #1
  		teq	r2, r1
  		subeq	r3, r0, #1
  		teq	r2, #0
  		bne	1b
  		mov	r0, r3
  		mov	pc, lr
  ENDPROC(strrchr)