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Johann authored
Fairly minor differences from sse2. pabsw and psignw are the big gains. Also re-uses some values in eob calculation to avoid an extra pcmp. Fixes test failures in HBD and OS X builds. Allows using it in 32bit builds, where it is about 40% faster than sse2. Substantially faster than the assembly for skip_block. 10-20% faster the rest of the time. Change-Id: If783bb3567e561e47667e10133b9c84414a334e2
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