[FFmpeg-devel] [PATCH 1/2] avutil/x86/intreadwrite: Add ability to detect whether MMX code is used

[Andreas Rheinhardt]

Andreas Rheinhardt:
> It can be used to call emms_c() only when needed.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> ---
>  libavutil/x86/intreadwrite.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/libavutil/x86/intreadwrite.h b/libavutil/x86/intreadwrite.h
> index 4061d19231..40f375b013 100644
> --- a/libavutil/x86/intreadwrite.h
> +++ b/libavutil/x86/intreadwrite.h
> @@ -29,6 +29,8 @@
>  
>  #if !HAVE_FAST_64BIT && defined(__MMX__)
>  
> +#define FF_COPY_SWAP_ZERO_USES_MMX
> +
>  #define AV_COPY64 AV_COPY64
>  static av_always_inline void AV_COPY64(void *d, const void *s)
>  {

Will apply this patchset tomorrow unless there are objections.

- Andreas