Correct prefetch hint in power7 memrchr

[Adhemerval Zanella]

On 24-03-2014 23:04, Alan Modra wrote:
> Typo fix.  Discovered when looking at some disassembly, and wondering
> why this disassembled as dcbtt.  My simple benchmark testing didn't
> show any effect of using the wrong hint, but at a guess you'd only see
> a difference on a very long memrchr with cold caches.
>
> 	* sysdeps/powerpc/powerpc64/power7/memrchr.S: Correct stream hint.
>
> diff --git a/sysdeps/powerpc/powerpc64/power7/memrchr.S b/sysdeps/powerpc/powerpc64/power7/memrchr.S
> index 40e436f..0c01ca2 100644
> --- a/sysdeps/powerpc/powerpc64/power7/memrchr.S
> +++ b/sysdeps/powerpc/powerpc64/power7/memrchr.S
> @@ -29,7 +29,7 @@ ENTRY (__memrchr)
>  	mr	r10,r3
>  	clrrdi	r6,r7,7
>  	li	r9,3<<5
> -	dcbt	r9,r6,16      /* Stream hint, decreasing addresses.  */
> +	dcbt	r9,r6,8       /* Stream hint, decreasing addresses.  */
>
>  	/* Replicate BYTE to doubleword.  */
>  	insrdi	r4,r4,8,48
>
This patch is ok, thanks Alan.