x86/vf_ssim: add ff_ssim_4x4_line_xop
~20% faster than ssse3. Also enabled for x86_32 Reviewed-by: NRonald S. Bultje <rsbultje@gmail.com> Signed-off-by: NJames Almer <jamrial@gmail.com>
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~20% faster than ssse3. Also enabled for x86_32 Reviewed-by: NRonald S. Bultje <rsbultje@gmail.com> Signed-off-by: NJames Almer <jamrial@gmail.com>