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Mismatch between C and x86 SIMD

dav1d does not give the same result in C (cpumask = 0) and in x86 SIMD on the following stream:

ftp://ftp.ateme.com/EMO/dav1d/test2.ivf

I get the following md5sum for the generated yuv:

  • In C: c2b1b2f8104fbcd4fbdb94b56b39e379
  • In SIMD: 949e874af199534409c7316a932f1bdf

aomdec gives the same result as dav1d in C.

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