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kernel/linux-imx6_3.14.28/arch/sh/lib64/strlen.S 632 Bytes
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  /*
   * Simplistic strlen() implementation for SHmedia.
   *
   * Copyright (C) 2003  Paul Mundt <lethal@linux-sh.org>
   */
  
  	.section .text..SHmedia32,"ax"
  	.globl	strlen
  	.type	strlen,@function
  
  	.balign 16
  strlen:
  	ptabs	r18, tr4
  
  	/*
  	 * Note: We could easily deal with the NULL case here with a simple
  	 * sanity check, though it seems that the behavior we want is to fault
  	 * in the event that r2 == NULL, so we don't bother.
  	 */
  /*	beqi    r2, 0, tr4 */	! Sanity check
  
  	movi	-1, r0
  	pta/l	loop, tr0
  loop:
  	ld.b	r2, 0, r1
  	addi	r2, 1, r2
  	addi	r0, 1, r0
  	bnei/l	r1, 0, tr0
  
  	or	r0, r63, r2
  	blink	tr4, r63
  
  	.size	strlen,.-strlen