[FFmpeg-devel] Does i686 have MMX?

[Måns Rullgård]

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.

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