[PATCH] memcpy-armv7a.S: Improve performance with misaligned buffers.

[Richard Earnshaw]

On 28/06/13 11:25, Will Newton wrote:
>
> Adjust the conditions for entering the aligned copy loop to
> improve performance on mutually misaligned buffer copies.
>
> 2013-06-28  Will Newton  <will.newton@linaro.org>
>
> 	* libc/machine/arm/memcpy-armv7a.S: Adjust entry to
> 	 aligned loop to improve misaligned copy performance.
> ---
>   newlib/libc/machine/arm/memcpy-armv7a.S | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/newlib/libc/machine/arm/memcpy-armv7a.S b/newlib/libc/machine/arm/memcpy-armv7a.S
> index de5bf9a..cd7962e 100644
> --- a/newlib/libc/machine/arm/memcpy-armv7a.S
> +++ b/newlib/libc/machine/arm/memcpy-armv7a.S
> @@ -242,8 +242,8 @@ def_fn memcpy p2align=6
>   .Lcpy_not_short:
>   	/* At least 64 bytes to copy, but don't know the alignment yet.  */
>   	str	tmp2, [sp, #-FRAME_SIZE]!
> -	and	tmp2, src, #3
> -	and	tmp1, dst, #3
> +	and	tmp2, src, #7
> +	and	tmp1, dst, #7
>   	cmp	tmp1, tmp2
>   	bne	.Lcpy_notaligned
>

OK.

R.