Add cc.sys.doNotUseSIMD

It is used to control using SIMD.js optimziation or not.

Author: huningxin

CCBoot.js

@@ -1822,6 +1822,11 @@ cc._initSys = function (config, CONFIG_KEY) {
     sys.openURL = function(url){
         window.open(url);
     }
+
+    /**
+     * Don't use SIMD.js optimization
+     */
+    sys.doNotUseSIMD = false;
 };
 
 //+++++++++++++++++++++++++something about sys end+++++++++++++++++++++++++++++

cocos2d/kazmath/mat4.js

@@ -1421,7 +1421,7 @@
         return temp.toAxisAndAngle();
     };
 
-    if(typeof(SIMD) !== 'undefined' && cc.doNotUseSIMD !== true) {
+    if(typeof(SIMD) !== 'undefined' && cc.sys.doNotUseSIMD !== true) {
         proto.inverse = proto.inverseSIMD;
         proto.isIdentity = proto.isIdentitySIMD;
         proto.transpose = proto.transposeSIMD;

cocos2d/kazmath/simd_benchmark/index.html

@@ -19,8 +19,9 @@ <h2 align="center" id="speedup"></h2>
   </div>
   <div id='echo'></div>
   <script>
-    var cc = cc || {};
-    cc.doNotUseSIMD = true;
+    var cc = cc || {sys: {}};
+    // Set doNotUseSIMD to compare the scalar version and SIMD version
+    cc.sys.doNotUseSIMD = true;
   </script>
   <script src="../utility.js"></script>
   <script src="../vec3.js"></script>

cocos2d/kazmath/vec3.js

@@ -209,7 +209,7 @@
         return tyArr;
     };
 
-    if(typeof(SIMD) !== 'undefined' && cc.doNotUseSIMD !== true) {
+    if(typeof(SIMD) !== 'undefined' && cc.sys.doNotUseSIMD !== true) {
         proto.transformCoord = proto.transformCoordSIMD;
     }
 })(cc);