From: James Almer <jamrial@gmail.com>
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH] libavcodec/h264pred: Remove pred8x8_horizontal_8_mmxext
Date: Sat, 2 Mar 2024 18:31:30 -0300
Message-ID: <a1deef04-c57e-47f5-a6ce-e585038a1037@gmail.com> (raw)
In-Reply-To: <AS8P250MB0744F3A24F613387529CDC8C8F5D2@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM>
On 3/2/2024 6:20 PM, Andreas Rheinhardt wrote:
> Kieran Kunhya:
>> $subj
>>
>> Old:
>> pred8x8_horizontal_8_c: 6.8
>> pred8x8_horizontal_8_mmxext: 8.6
>> pred8x8_horizontal_8_ssse3: 4.8
>>
>> New:
>> pred8x8_horizontal_8_c: 9.2
>> pred8x8_horizontal_8_sse2: 12.2
>> pred8x8_horizontal_8_ssse3: 4.9
>>
>
> You do realize that the SSE2 version is worse than the mmxext version?
> In fact, worse than the C version. Given that both the mmxext and sse2
> versions are worse than C, there is no point in having the mmxext one at
> all and no need for an SSE2 replacement.
The SSSE3 version needs to be updated to use xmm registers either way.
>
> - Andreas
>
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next prev parent reply other threads:[~2024-03-02 21:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-02 21:12 Kieran Kunhya
2024-03-02 21:20 ` Andreas Rheinhardt
2024-03-02 21:31 ` James Almer [this message]
2024-03-02 21:37 ` Kieran Kunhya
2024-03-02 23:31 ` Henrik Gramner via ffmpeg-devel
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