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kernel/linux-imx6_3.14.28/arch/arm/lib/memchr.S 523 Bytes
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  /*
   *  linux/arch/arm/lib/memchr.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(memchr)
  1:	subs	r2, r2, #1
  	bmi	2f
  	ldrb	r3, [r0], #1
  	teq	r3, r1
  	bne	1b
  	sub	r0, r0, #1
  2:	movne	r0, #0
  	mov	pc, lr
  ENDPROC(memchr)