Javascript unsigned right shift Operator(>>>) always return 0

unsigned right shift operator(>>>) always return 0.
it is working correctly in Windows VS 2013 64-bit 5.4.0 and Linux Gcc 64-bit 5.4.0,
but not on android_armv7

import QtQuick 2.0

Item {
    Component.onCompleted: {
        var x = -14;
        console.log(x >>> 2); //got 0, expecting 1073741820, 
    }
}