ref: 06d3ed8ddcf36f2b438b33aab58d30b695232c1d
parent: 287f3538d4d19d2333a200b69b030e2ccb5ceedb
parent: f5d086eba1311da8de78e0f97b47ea62952639ab
author: Licai Guo <licaguo@cisco.com>
date: Tue Feb 18 09:21:44 EST 2014
Merge pull request #294 from huili2/neg_left_shift negative data with left shift, use cast or multiplication instead