[FFmpeg-devel] [PATCH 3/3] configure: loongson enable subarch mips64

周晓勇 zhouxiaoyong at loongson.cn
Sat May 9 18:07:02 CEST 2015

> On Fri, May 08, 2015 at 06:17:59PM +0800, 周晓勇 wrote:
> > From 1094ca8983b34492dece7da5cd09125dbda04726 Mon Sep 17 00:00:00 2001
> > From: ZhouXiaoyong <zhouxiaoyong at loongson.cn>
> > Date: Fri, 8 May 2015 09:08:00 +0800
> > Subject: [PATCH 3/3] configure: loongson enable subarch mips64
> > 
> > 1.Fedora19(Loongson) has released 32bit version and 64bit will comming soon.
> if its actually 32bit currently than maybe mips is more correct than
> mips64, i dont know

you could check the FC19(build with mips3 instruction set) system on the Loongson-3A-780E machine. it only has /lib/ forlder, but the CentOS6.4-MultiLib has /lib/, /lib32/ and /lib64. /lib/ is O32 API, /lib32/ is N32 API and /lib64 is N64 API. i think it's ok for ffmpeg to use MIPS64 instruction set on a 32bit OS, because our kernel has 64bit API and the ffmpeg-2.1.7-1.loongson installed in the FC19 works correctly. by the way, the system BACKUP on the machine is build with mips64r2 instruction set and it works faster than FC19.
how do you think?

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