[FFmpeg-devel] [RFC] avx2 and scalarproduct

[Kieran Kunhya]

On 9 Oct 2015 10:13 pm, "Paul B Mahol" <onemda at gmail.com> wrote:
>
> diff --git a/libavcodec/x86/audiodsp.asm b/libavcodec/x86/audiodsp.asm
> index 3ffb27f..246e945 100644
> --- a/libavcodec/x86/audiodsp.asm
> +++ b/libavcodec/x86/audiodsp.asm
> @@ -41,7 +41,14 @@ cglobal scalarproduct_int16, 3,3,3, v1, v2, order
>      add     orderq, mmsize*2
>      jl .loop
>      HADDD   m2, m0
> +%if cpuflag(avx2)
> +    movd   eax, xm2
> +%if mmsize > 16
> +    xor   eax, eax

huh?

> +%endif
> +%else
>      movd   eax, m2
> +%endif
>  %if mmsize == 8
>      emms
>  %endif
> @@ -52,6 +59,8 @@ INIT_MMX mmxext
>  SCALARPRODUCT
>  INIT_XMM sse2
>  SCALARPRODUCT
> +INIT_YMM avx2
> +SCALARPRODUCT
>
>
>
 ;-----------------------------------------------------------------------------
> diff --git a/libavcodec/x86/audiodsp_init.c
b/libavcodec/x86/audiodsp_init.c
> index a2ce231..b99a129 100644
> --- a/libavcodec/x86/audiodsp_init.c
> +++ b/libavcodec/x86/audiodsp_init.c
> @@ -29,6 +29,8 @@ int32_t ff_scalarproduct_int16_mmxext(const int16_t
*v1, const int16_t *v2,
>                                        int order);
>  int32_t ff_scalarproduct_int16_sse2(const int16_t *v1, const int16_t *v2,
>                                      int order);
> +int32_t ff_scalarproduct_int16_avx2(const int16_t *v1, const int16_t *v2,
> +                                    int order);
>
>  void ff_vector_clip_int32_mmx(int32_t *dst, const int32_t *src,
>                                int32_t min, int32_t max, unsigned int
len);
> @@ -64,4 +66,8 @@ av_cold void ff_audiodsp_init_x86(AudioDSPContext *c)
>
>      if (EXTERNAL_SSE4(cpu_flags))
>          c->vector_clip_int32 = ff_vector_clip_int32_sse4;
> +
> +    if (EXTERNAL_AVX2(cpu_flags))
> +        c->scalarproduct_int16 = ff_scalarproduct_int16_avx2;
> +
>  }
> --
> 1.9.1
>
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