Commit 1ca3f2b3 authored by Hui Su's avatar Hui Su

Optimize intra reference availability check

Use binary flags to indicate if top-right/bottom-left referecne is
available. Pack these flags into 8-bit integers.

The table size is reduced by 8 times.

Change-Id: If026989f421f11b4fb5f54708d645f26435e5958
parent ee9c4d96
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