Re: [FFmpeg-devel] [PATCH v1] configure: fix mmi check

[yinshiyou-hf]

> -----原始邮件-----
&gt; 发件人: "Jiaxun Yang" <jiaxun.y...@flygoat.com>
&gt; 发送时间: 2021-07-23 17:27:18 (星期五)
&gt; 收件人: yinshiyou...@loongson.cn, "FFmpeg development discussions and 
patches" <ffmpeg-devel@ffmpeg.org>
&gt; 抄送: "金波" <ji...@loongson.cn>
&gt; 主题: Re: [FFmpeg-devel] [PATCH v1] configure: fix mmi check
&gt; 
&gt; 
&gt; 在 2021/7/23 17:23, yinshiyou...@loongson.cn 写道:
&gt; &gt; &gt; -----原始邮件-----
&gt; &gt; &gt; 发件人: "Jiaxun Yang" <jiaxun.y...@flygoat.com>
&gt; &gt; &gt; 发送时间: 2021-07-23 10:34:37 (星期五)
&gt; &gt; &gt; 收件人: ffmpeg-devel@ffmpeg.org
&gt; &gt; &gt; 抄送:
&gt; &gt; &gt; 主题: Re: [FFmpeg-devel] [PATCH v1] configure: fix mmi check
&gt; &gt; &gt;
&gt; &gt; &gt;
&gt; &gt; &gt; 在 2021/7/23 上午9:39, Jin Bo 写道:
&gt; &gt; &gt; &gt; pxor is loongson media extension instruction, it's not
&gt; &gt; &gt; &gt; supported yet on upstream gcc complier. Disable mmi to
&gt; &gt; &gt; &gt; avoid build error if the compiler does not support it.
&gt; &gt; &gt;
&gt; &gt; &gt; Hi Bo,
&gt; &gt; &gt;
&gt; &gt; &gt; Well I have to repeat that your statement is *NOT* true.
&gt; &gt; &gt;
&gt; &gt; &gt; Upstream GCC *DO* support Loongson MMI.
&gt; &gt; &gt;
&gt; &gt; &gt; Disabling Loongson MMI just because different instruction naming 
is
&gt; &gt; &gt; unacceptable from my aspect, note that beside usage in your 
company we
&gt; &gt; &gt; have other distros like Debian and AOSC, they have strict 
upstream policy .
&gt; &gt; &gt;
&gt; &gt; &gt; My suggestion is to use instruction macro to workaround the 
problem.
&gt; &gt; &gt;
&gt; &gt; &gt; Thanks.
&gt; &gt; &gt;
&gt; &gt; &gt; - Jiaxun
&gt; &gt; &gt;
&gt; &gt;
&gt; &gt; Let's adjust the commit message and  make it merged or abandon this 
patch.
&gt; &gt; The main purpose of this patch is to avoid compilation error of 
‘pxor’.
&gt; &gt; The best solution of 'pxor' compilation error is to add support in 
compiler.
&gt; 
&gt; I'll try to come up a workaound in next few days.
&gt; 
&gt; Thanks.
&gt; 
&gt; - Jiaxun
&gt; 
I really don't recommend using ‘xor’ to operate floating-point registers and 
adding macro to make it too 
complex.</jiaxun.y...@flygoat.com></ji...@loongson.cn></ffmpeg-devel@ffmpeg.org></jiaxun.y...@flygoat.com>
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