/*
   * Copyright 2005-2010 Analog Devices Inc.
   *
   * Licensed under the ADI BSD license or the GPL-2 (or later)
   */
  
  #include <linux/linkage.h>
  
  /* void *strncpy(char *s1, const char *s2, size_t n);
   * R0 = address (dest)
   * R1 = address (src)
   * R2 = size (n)
   * Returns a pointer to the destination string dest
   */
  
  #ifdef CONFIG_STRNCMP_L1
  .section .l1.text
  #else
  .text
  #endif
  
  .align 2
  
  ENTRY(_strncmp)
  	CC = R2 == 0;
  	if CC JUMP 5f;
  
  	P0 = R0 ;       /* s1 */
  	P1 = R1 ;       /* s2 */
  1:
  	R0 = B[P0++] (Z);      /* get *s1 */
  	R1 = B[P1++] (Z);      /* get *s2 */
  	CC = R0 == R1;         /* compare a byte */
  	if ! cc jump 3f;       /* not equal, break out */
  	CC = R0;               /* at end of s1? */
  	if ! cc jump 4f;       /* yes, all done */
  	R2 += -1;              /* no, adjust count */
  	CC = R2 == 0;
  	if ! cc jump 1b (bp);  /* more to do, keep going */
  2:
  	R0 = 0;                /* strings are equal */
  	jump.s 4f;
  3:
  	R0 = R0 - R1;          /* *s1 - *s2 */
  4:
  	RTS;
  
  5:
  	R0 = 0;
  	RTS;
  
  ENDPROC(_strncmp)