From: Niklas Haas <ffmpeg@haasn.xyz>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] gcc: Remove auto-vectorization limitation.
Date: Tue, 3 Jun 2025 18:14:16 +0200
Message-ID: <20250603181416.GB181094@haasn.xyz> (raw)
In-Reply-To: <10EEC0E3-14D3-44D3-B93E-41523918FA88@remlab.net>
On Fri, 30 May 2025 09:58:48 +0300 Rémi Denis-Courmont <remi@remlab.net> wrote:
>
> That will harm performance on x87, whence fminf() and co are function calls rather than single instructions. What we actually should do is define separate macros for integer vs float vs double.
We have an open bug in swscale on 32-bit platforms where the use of x87 causes
non-bitexact results in 32-bit platforms, resolved by setting -mfpu=sse at
build time.
Maybe we should think about setting this flag globally?
>
> But there are hundreds of use sites to patch. To be bluntly honest, I don't have the motivation to carry that tedious repetitive work out in my free time.
>
> Br,
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next prev parent reply other threads:[~2025-06-03 16:14 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-21 6:17 Jiawei
2025-05-21 6:52 ` Nicolas George
2025-05-21 10:17 ` Jiawei
2025-05-21 18:21 ` Frank Plowman
2025-05-22 6:32 ` Jiawei
2025-05-24 1:46 ` Kieran Kunhya via ffmpeg-devel
2025-05-24 4:10 ` Jiawei
2025-05-24 16:10 ` Rémi Denis-Courmont
2025-05-25 21:37 ` Michael Niedermayer
2025-05-26 8:43 ` Rémi Denis-Courmont
2025-05-30 0:46 ` Michael Niedermayer
2025-05-30 6:58 ` Rémi Denis-Courmont
2025-05-31 13:39 ` Michael Niedermayer
2025-06-03 16:14 ` Niklas Haas [this message]
2025-06-04 11:13 ` Rémi Denis-Courmont
2025-05-21 7:46 ` Michael Niedermayer
2025-05-21 10:32 ` Jiawei
2025-05-21 11:09 ` Michael Niedermayer
2025-05-21 9:04 ` Zhao Zhili
2025-05-21 10:26 ` Jiawei
2025-05-21 10:33 ` Andreas Rheinhardt
2025-05-21 12:09 ` Martin Storsjö
2025-05-21 12:14 ` Andreas Rheinhardt
2025-05-21 12:22 ` Martin Storsjö
2025-05-21 18:12 ` softworkz .
2025-05-24 12:00 ` Rémi Denis-Courmont
2025-05-21 10:08 Jiawei
2025-05-21 10:14 Jiawei
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