--- /dev/null
+// 20.2.2.18 Math.imul(x, y)
+var $export = require('./_export')
+ , $imul = Math.imul;
+
+// some WebKit versions fails with big numbers, some has wrong arity
+$export($export.S + $export.F * require('./_fails')(function(){
+ return $imul(0xffffffff, 5) != -5 || $imul.length != 2;
+}), 'Math', {
+ imul: function imul(x, y){
+ var UINT16 = 0xffff
+ , xn = +x
+ , yn = +y
+ , xl = UINT16 & xn
+ , yl = UINT16 & yn;
+ return 0 | xl * yl + ((UINT16 & xn >>> 16) * yl + xl * (UINT16 & yn >>> 16) << 16 >>> 0);
+ }
+});
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