[PATCH] powerpc: Align hot loops of memset() and backwards_memcpy()

[Christophe Leroy]

Le 04/08/2016 à 08:53, Anton Blanchard a écrit :
> From: Anton Blanchard <anton at samba.org>
>
> Align the hot loops in our assembly implementation of memset()
> and backwards_memcpy().
>
> backwards_memcpy() is called from tcp_v4_rcv(), so we might
> want to optimise this a little more.
>
> Signed-off-by: Anton Blanchard <anton at samba.org>

Shouldn't this patch be titled powerpc/64, as powerpc32 has a different 
memset() ?

Christophe

> ---
>  arch/powerpc/lib/mem_64.S | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
> index 43435c6..eda7a96 100644
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -37,6 +37,7 @@ _GLOBAL(memset)
>  	clrldi	r5,r5,58
>  	mtctr	r0
>  	beq	5f
> +	.balign 16
>  4:	std	r4,0(r6)
>  	std	r4,8(r6)
>  	std	r4,16(r6)
> @@ -90,6 +91,7 @@ _GLOBAL(backwards_memcpy)
>  	andi.	r0,r6,3
>  	mtctr	r7
>  	bne	5f
> +	.balign 16
>  1:	lwz	r7,-4(r4)
>  	lwzu	r8,-8(r4)
>  	stw	r7,-4(r6)
>