From: Yaowu Xu <yaowu@google.com>
Date: Wed, 14 Dec 2016 17:37:14 +0000 (-0800)
Subject: Change order of operation to avoid ubsan warnings
X-Git-Tag: v1.6.1~42
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=27e1bacdb3ab3317c0a1c8f62fec3f5b0824cf99;p=platform%2Fupstream%2Flibvpx.git

Change order of operation to avoid ubsan warnings

This commit change an order of operation to avoid left shifts of
negative numbers.

Change-Id: I607c7eb91658c7a5ef397fc1504721d1b10e3dd6
---

diff --git a/vp8/decoder/threading.c b/vp8/decoder/threading.c
index 5b6200f..9f77519 100644
--- a/vp8/decoder/threading.c
+++ b/vp8/decoder/threading.c
@@ -318,7 +318,7 @@ static void mt_decode_mb_rows(VP8D_COMP *pbi, MACROBLOCKD *xd,
 
     xd->left_available = 0;
 
-    xd->mb_to_top_edge = -((mb_row * 16)) << 3;
+    xd->mb_to_top_edge = -((mb_row * 16) << 3);
     xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3;
 
     if (pbi->common.filter_level) {