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David Barker authored
Add an SSE4 version of compute_cross_correlation() from corner_match.c. This function is about 3.4x the speed of the scalar code; determine_correspondence as a whole is about 2.5-3x the speed it was previously. BUG=aomedia:487 Change-Id: I707b7cfd5c513c025d3ee7fb6a5f1fa335ecd495
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