Subversion Repositories openrisc

#if defined __thumb__

#include "../../string/strcpy.c"

#else

#include <string.h>

#include "xscale.h"

char *

strcpy (char *dest, const char *src)

{

  char *dest0 = dest;

  asm (PRELOADSTR ("%0") : : "r" (src));

#ifndef __OPTIMIZE_SIZE__

  if (((long)src & 3) == ((long)dest & 3))

    {

      /* Skip unaligned part.  */

      while ((long)src & 3)

        {

          if (! (*dest++ = *src++))

            return dest0;

        }

  /* Load two constants:

     R4 = 0xfefefeff [ == ~(0x80808080 << 1) ]

     R5 = 0x80808080  */

  asm ("mov     r5, #0x80\n\

        ldr     r1, [%1, #0]\n\

        add     r5, r5, #0x8000\n\

        add     r5, r5, r5, lsl #16\n\

        mvn     r4, r5, lsl #1\n\

\n\

        add     r3, r1, r5\n\

        bic     r3, r3, r1\n\

        ands    r2, r3, r4\n\

        bne     1f\n\

0:\n\

        ldr     r3, [%1, #0]\n\

        ldr     r1, [%1, #4]!\n\

"       PRELOADSTR("%1") "\n\

        str     r3, [%0], #4\n\

        add     r2, r1, r4\n\

        bic     r2, r2, r1\n\

        ands    r3, r2, r5\n\

        beq     0b\n\

1:"

       : "=&r" (dest), "=&r" (src)

       : "0" (dest), "1" (src)

       : "r1", "r2", "r3", "r4", "r5", "memory", "cc");

    }

#endif

  while (*dest++ = *src++)

    asm (PRELOADSTR ("%0") : : "r" (src));

  return dest0;

}

#endif