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

[Måns Rullgård]

Panagiotis Issaris <takis.issaris at uhasselt.be> writes:

> Hi,
>
> 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.
>
> Index: configure
> ===================================================================
> --- configure	(revision 12527)
> +++ configure	(working copy)
> @@ -782,8 +784,8 @@
>  iwmmxt_deps="armv4l"
>  mmi_deps="mips"
>  mmx_deps="x86"
> -mmx2_deps="x86"
> -ssse3_deps="x86"
> +mmx2_deps="x86 mmx"
> +ssse3_deps="x86 mmx2"
>  vis_deps="sparc"
>
>  # decoders / encoders

I can imagine someone wishing to disable only mmx on an sse-capable
machine to save some space.  If you want an option to disable all
assembler optimisations, it should be called something else.

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