[FFmpeg-devel] [PATCH] Moves yuv2yuvX_sse3 to yasm, unrolls main loop and other small optimizations for ~20% speedup.

[Alan Kelly]

Thanks for the feedback Anton.

The second patch incorporates changes suggested by James Almer:
avx2 instructions are wrapped in if cpuflag(avx2) and movddup restored
mm1 is replaced by m1 on x86_32



On Tue, Oct 27, 2020 at 10:40 AM Anton Khirnov <anton at khirnov.net> wrote:

> Hi,
> Quoting Alan Kelly (2020-10-27 10:10:14)
> > ---
> >  libswscale/x86/Makefile     |   1 +
> >  libswscale/x86/swscale.c    |  75 ++++---------------------
> >  libswscale/x86/yuv2yuvX.asm | 109 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 120 insertions(+), 65 deletions(-)
> >  create mode 100644 libswscale/x86/yuv2yuvX.asm
> >
>
> No comments on the code itself (yet?), but as for your submission:
> - when you send multiple iterations of the same patch, it is helpful to
>   mention what changed, e.g. with git send-email --annotate
> - the commit message should follow the standard format of:
>     * swscale: short summary of the change
>
>       Extended description of the commit, if needed.
>
> --
> Anton Khirnov
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