arch/blackfin/lib/strcpy.S

   1 /*
   2  * Copyright 2005-2010 Analog Devices Inc.
   3  *
   4  * Licensed under the Clear BSD license or the GPL-2 (or later)
   5  */
   6
   7 #include <linux/linkage.h>
   8
   9 /* void *strcpy(char *dest, const char *src);
  10  * R0 = address (dest)
  11  * R1 = address (src)
  12  *
  13  * Returns a pointer to the destination string dest
  14  */
  15
  16 #ifdef CONFIG_STRCPY_L1
  17 .section .l1.text
  18 #else
  19 .text
  20 #endif
  21
  22 .align 2
  23
  24 ENTRY(_strcpy)
  25         P0 = R0 ;       /* dst*/
  26         P1 = R1 ;       /* src*/
  27
  28 1:
  29         R1 = B [P1++] (Z);
  30         B [P0++] = R1;
  31         CC = R1;
  32         if cc jump 1b (bp);
  33         RTS;
  34
  35 ENDPROC(_strcpy)