[FFmpeg-devel] patch: fix buf in configure to ensure theHAVE_VSX is only enabled when HAVE_ALTIVECT is enabled
rongyan
rongyan236 at foxmail.com
Mon Oct 20 08:22:15 CEST 2014
Hi,
Do you have any more suggestion on this?
Does it better if I renew it on latest version?
Thanks.
Rong Yan
------------------
The world has enough for everyone's need, but not enough for everyone's greed.
------------------ Original ------------------
From: "rongyan";<rongyan236 at foxmail.com>;
Date: Thu, Oct 16, 2014 11:17 AM
To: "michaelni"<michaelni at gmx.at>; "FFmpeg development discussions"<ffmpeg-devel at ffmpeg.org>;
Subject: Re: [FFmpeg-devel] patch: fix buf in configure to ensure theHAVE_VSX is only enabled when HAVE_ALTIVECT is enabled
Hi,
Since the code HAVE_VSX covered is part of the altivec implementation, but not a independent implementaiton for all the code covered by macro HAVE_ALTIVEC. If HAVE_ALTIVEC is disabled, but only HAVE_VSX is enabled, the code will crash.
Thanks.
Rong Yan
------------------
The world has enough for everyone's need, but not enough for everyone's greed.
------------------ Original ------------------
From: "michaelni";<michaelni at gmx.at>;
Date: Tue, Oct 14, 2014 11:10 PM
To: "FFmpeg development discussions and patches"<ffmpeg-devel at ffmpeg.org>; "rongyan"<rongyan236 at foxmail.com>;
Subject: Re: [FFmpeg-devel] patch: fix buf in configure to ensure theHAVE_VSX is only enabled when HAVE_ALTIVECT is enabled
On Mon, Oct 13, 2014 at 04:14:57PM +0800, rongyan wrote:
> Reimar,
> HAVE_VSX is used to make PPC ALTIVEC code successfully running in LE.
> Yes, we can add some comment to the configure.
i belive the question reimar had was
why VSX is not enabled when altivec is disabled ?
or the same from another viewpoint
if VSX implies altivec
[...]
> Sorry if my question makes no sense (I am fairly clueless about little-endian PPC), but why is it necessary to disable vsx if altivec is disabled?
> It would be good to add that e.g. as a comment to configure (unless it's some obvious reason I missed).
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
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