ref: 39de45d3cc178012cd5e8e17a2f9bcae2f858299
parent: debd86ec82f5fc9a37f5f3a828ff9ab0815a9c55
author: Linfeng Zhang <linfengz@google.com>
date: Mon Mar 26 09:06:09 EDT 2018
Update sad4d x86 functions Speed change is marginal. Change-Id: I4d548e9763ce43bd546f19132202f7a8509a32bf