[FFmpeg-devel] [PATCH] x86/dsputil: implement 3DNow version of vector_clipf

[Clément Bœsch]

On Tue, May 27, 2014 at 03:16:03PM -0300, James Almer wrote:
> Signed-off-by: James Almer <jamrial at gmail.com>
> ---
> Those old k6-2 and k7 need some love
> 
>  libavcodec/x86/dsputil.asm    | 47 +++++++++++++++++++++++++++++++++----------
>  libavcodec/x86/dsputil_init.c | 11 ++++++++++
>  libavcodec/x86/dsputil_x86.h  |  2 ++
>  3 files changed, 49 insertions(+), 11 deletions(-)
> 
> diff --git a/libavcodec/x86/dsputil.asm b/libavcodec/x86/dsputil.asm
> index 4804682..36c9258 100644
> --- a/libavcodec/x86/dsputil.asm
> +++ b/libavcodec/x86/dsputil.asm
> @@ -630,19 +630,35 @@ PUT_SIGNED_PIXELS_CLAMPED 3
>  ;void ff_vector_clipf(float *dst, const float *src,
>  ;                     float min, float max, int len)
>  ;-----------------------------------------------------
> -INIT_XMM sse
> +%macro CLIPF_3DNOW 3
> +    pfmin   %1, %3
> +    pfmax   %1, %2
> +%endmacro
> +
> +%macro CLIPF_SSE 3
> +    minps   %1, %3
> +    maxps   %1, %2
> +%endmacro
> +

Maybe do twice at a time so you can do some pairing (which might help with
performance)?

[...]

-- 
Clément B.
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