PowerPC: Align power7 memcpy using VSX to quadword

[Ulrich Weigand]

Adhemerval Zanella wrote:

> 	* sysdeps/powerpc/powerpc64/power7/memcpy.S: Align VSX copies to 16B
> 	to avoid alignment traps in non-cacheable memory.
> 	* sysdeps/powerpc/powerpc32/power7/memcpy.S: Likewise.

Looks basically good to me; a couple of comments:

>  /* Get the DST and SRC aligned to 8 bytes (16 for little-endian).  */

Comment should be updated too.

>  L(copy_GE_32_unaligned):
>  	clrldi	0,0,60	      /* Number of bytes until the 1st dst quadword.  */
> -#ifndef __LITTLE_ENDIAN__
>  	andi.	10,3,15	      /* Check alignment of DST (against quadwords).  */
> -#endif
>  	srdi	9,cnt,4	      /* Number of full quadwords remaining.  */

It seems the "andi." can now be removed, since this was already done by the
caller of the copy_GE_32_unaligned label.  (Note that this is a #ifndef,
and the caller now always does it the way it used to for __LITTLE_ENDIAN__.)

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU/Linux compilers and toolchain
  Ulrich.Weigand@de.ibm.com