[FFmpeg-devel] [PATCH 2/4] x86: xvid_idct: port MMX IDCT to yasm

Christophe Gisquet christophe.gisquet at gmail.com
Fri Mar 13 20:19:26 CET 2015


2015-03-13 14:34 GMT+01:00 Michael Niedermayer <michaelni at gmx.at>:
>> They will not be used in any real world scenario.
> well it could be usefull in debuging in same cases
> especially if all mmx code is disabled on x86_64, for any single
> function its not too likely

I believe fate and proper bug reports are here for that, even with
your scenarios. I mean, for instance I can only test Win32/64, but
neither linux x86, PPC nor ARM, so I haven't bought much improvement
with this.

So I'd, as well as several x86 implementers, prefer the MMX* code not
to be built under ARCH_X86_32. You seemed to be fine with either.

And this was accepted as an intermediate ground between not keeping
all optimizations that only apply to 15+ yo systems (there are several
people of that opinion), and keeping everything as is.


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