Zaggy1024 2ec043c4db LibVideo/VP9: Make inter-prediction fast path accumulators 32-bit ...

Some occasional cases could cause the accumulator to overflow and have
an incorrect result. It would be nice to use a smaller accumulator, but
it seems not to be correct. :^(

We now cast to i16 to allow 128-bit vectorization to make use of one
whole register instead of having to split the loop into multiple.

This results in about a 5% reduction in performance in my testing.

2023-04-30 05:58:27 +02:00

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