On 9/12/2018 7:42 AM, Paul B Mahol wrote:
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> libavutil/float_dsp.c | 9 +++++++++
> libavutil/float_dsp.h | 16 ++++++++++++++++
> 2 files changed, 25 insertions(+)
Ah, i had a patch like this lying around but never got to send it.
I still have the x86 simd implementation, though, so I'll send that later.
>
> diff --git a/libavutil/float_dsp.c b/libavutil/float_dsp.c
> index 1d4911d815..6e28d71b57 100644
> --- a/libavutil/float_dsp.c
> +++ b/libavutil/float_dsp.c
> @@ -32,6 +32,14 @@ static void vector_fmul_c(float *dst, const float *src0,
> const float *src1,
> dst[i] = src0[i] * src1[i];
> }
>
> +static void vector_dmul_c(double *dst, const double *src0, const double
> *src1,
> + int len)
> +{
> + int i;
> + for (i = 0; i < len; i++)
> + dst[i] = src0[i] * src1[i];
> +}
> +
> static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
> int len)
> {
> @@ -131,6 +139,7 @@ av_cold AVFloatDSPContext *avpriv_float_dsp_alloc(int
> bit_exact)
> return NULL;
>
> fdsp->vector_fmul = vector_fmul_c;
> + fdsp->vector_dmul = vector_dmul_c;
> fdsp->vector_fmac_scalar = vector_fmac_scalar_c;
> fdsp->vector_fmul_scalar = vector_fmul_scalar_c;
> fdsp->vector_dmac_scalar = vector_dmac_scalar_c;
> diff --git a/libavutil/float_dsp.h b/libavutil/float_dsp.h
> index 2c24d93471..9c664592bd 100644
> --- a/libavutil/float_dsp.h
> +++ b/libavutil/float_dsp.h
> @@ -173,6 +173,22 @@ typedef struct AVFloatDSPContext {
> * @return sum of elementwise products
> */
> float (*scalarproduct_float)(const float *v1, const float *v2, int len);
> +
> + /**
> + * Calculate the entry wise product of two vectors of doubles and store
> the result in
> + * a vector of doubles.
> + *
> + * @param dst output vector
> + * constraints: 32-byte aligned
> + * @param src0 first input vector
> + * constraints: 32-byte aligned
> + * @param src1 second input vector
> + * constraints: 32-byte aligned
> + * @param len number of elements in the input
> + * constraints: multiple of 16
Why not 8?
> + */
> + void (*vector_dmul)(double *dst, const double *src0, const double *src1,
> + int len);
> } AVFloatDSPContext;
>
> /**
>
LGTM.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
