From: "Rémi Denis-Courmont" <remi@remlab.net>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH] lavc/vp8dsp: R-V V put_vp8_pixels
Date: Wed, 21 Feb 2024 20:01:48 +0200
Message-ID: <4695108.ySF7tv79p0@basile.remlab.net> (raw)
In-Reply-To: <CAEa-L+sTfrEDxK4R63YFh7pTwYyYJZdBPPdDgH0vxyKNw3_+cg@mail.gmail.com>
Hello,
Le maanantaina 19. helmikuuta 2024, 13.13.43 EET flow gg a écrit :
> The reason for using m1+le8 instead of stride load + larger group
> multipliers is the same as in "[FFmpeg-devel] [PATCH 1/7] lavc/me_cmp: R-V
> V pix_abs."
>
> In the test, there is
>
> #define src (buf + 2 * SRC_BUF_STRIDE + 2 + 1)
>
> Therefore, not using e8 will result : (fatal signal 7: Bus error).
Yes, you could also just say that alignment is insufficient :)
It is still possible to load rectangles of up to 8 columns using vlseg8e8, but
it might be slower than just repeating the 8 regular loads, and it won't work
if you need calculations between rows.
I may be missing something but I don't understand what purpose the header file
serves here?
--
Rémi Denis-Courmont
http://www.remlab.net/
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next prev parent reply other threads:[~2024-02-21 18:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-19 11:13 flow gg
2024-02-21 18:01 ` Rémi Denis-Courmont [this message]
2024-02-22 1:42 ` flow gg
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