[FFmpeg-devel] [PATCH] Make mmx2 dependent on mmx/ssse3 dependent on mmx2

Robert Swain robert.swain
Fri Mar 21 11:54:27 CET 2008


On 21/03/2008, Panagiotis Issaris <takis.issaris at uhasselt.be> wrote:
>  First of all, I'm not sure about this patch... The thing is, I had
>  expected the configure script to disable mmx2 and ssse3 too when
>  disabling mmx, which it currently doesn't do. But, that's just because
>  I'm not aware of any machines implementing mmx2 but not mmx. Anyway,
>  attached patch makes mmx2 dependent on mmx, likewise for ssse3 which
>  becomes dependent on mmx2. So, with the attached patch --disable-mmx
>  disables them all.

What if one only wants to disable MMX but retain MMX2 and SSSE3? I
think they should only disable the instruction set to which they refer
and maybe add another option to disable all SIMD optimisations.


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