[FFmpeg-devel] [PATCH] motion_est_mmx: prefer xmm registers below xmm6 when they are available

[Ramiro Polla]

On Sun, Oct 31, 2010 at 9:59 AM, Ronald S. Bultje <rsbultje at gmail.com> wrote:
> On Sat, Oct 30, 2010 at 3:41 PM, Ramiro Polla <ramiro.polla at gmail.com> wrote:
>> $subj
> [..]
> --- a/libavcodec/x86/motion_est_mmx.c
> +++ b/libavcodec/x86/motion_est_mmx.c
>> @@ -111,9 +111,9 @@ static int sad16_sse2(void *v, uint8_t *blk2, uint8_t *blk1, int stride, int h)
>> ? ? ? ? ?: "r" ((x86_reg)stride)
>> ? ? ?);
>> ? ? ?__asm__ volatile(
>> - ? ? ? ?"movhlps %%xmm6, %%xmm0 ? ? ? ? \n\t"
>> - ? ? ? ?"paddw ? %%xmm0, %%xmm6 ? ? ? ? \n\t"
>> - ? ? ? ?"movd ? ?%%xmm6, %0 ? ? ? ? ? ? \n\t"
>> + ? ? ? ?"movhlps %%xmm2, %%xmm0 ? ? ? ? \n\t"
>> + ? ? ? ?"paddw ? %%xmm0, %%xmm2 ? ? ? ? \n\t"
>> + ? ? ? ?"movd ? ?%%xmm2, %0 ? ? ? ? ? ? \n\t"
>> ? ? ? ? ?: "=r"(ret)
>> ? ? ?);
>> ? ? ?return ret;
>
> The blocks should probably be merged.

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