[FFmpeg-devel] Does i686 have MMX?

[Måns Rullgård]

Alex Converse <alex.converse at gmail.com> writes:

> 2010/8/26 M?ns Rullg?rd <mans at mansr.com>
>
>> Jason Garrett-Glaser <darkshikari at gmail.com> writes:
>>
>> > 2010/8/26 M?ns Rullg?rd <mans at mansr.com>:
>> >> Alex Converse <alex.converse at gmail.com> writes:
>> >>
>> >>> 2010/8/26 M?ns Rullg?rd <mans at mansr.com>:
>> >>>> Jason Garrett-Glaser <darkshikari at gmail.com> writes:
>> >>>>
>> >>>>> The issue is simple:
>> >>>>>
>> >>>>> 1.  People use --cpu on x86 to mean "it should run on at least this
>> >>>>> CPU, and contain optimizations for all better CPUs".
>> >>>>
>> >>>> Are you aware of the contradiction in that statement?
>> >>>
>> >>> please elaborate
>> >>
>> >> "Optimisations for better CPUs" might not run on "this CPU".  Thus, if
>> >> the code "contains" such optimisations, it might not run, yet running
>> >> was a requirement.
>> >
>> > Runtime detection exists for a reason.  Don't be obtuse.
>>
>> A lot of existing things are flawed.
>
> Did you find that in a fortune cookie?
>
> WTF are you trying to say?
>
> Are you saying the concept of runtime detection is flawed?

Yes.  It solves only half the problem.  I already explained why.

-- 
M?ns Rullg?rd
mans at mansr.com