[PATCH 4/4] [Powerpc] tune/optimize memmove/wordcopy. Call memcpy when appropriate.

[Segher Boessenkool]

> @@ -51,6 +51,10 @@ MEMMOVE (a1, a2, len)
>    unsigned long int dstp = (long int) dest;
>    unsigned long int srcp = (long int) src;
>
> +  /* If there is no overlap between ranges, call the builtin  
> memcpy.  */
> +  if ( (dstp > (srcp + len)) || (srcp > (dstp + len)) )
> +    return __builtin_memcpy (dest, src, len);

You can use >= instead of > here.

> +
>    /* This test makes the forward copying code be used whenever  
> possible.
>       Reduces the working set.  */
>    if (dstp - srcp >= len)	/* *Unsigned* compare!  */

This test is then simply "dstp < srcp", might be more readable.


Segher