presto-main/src/main/java/io/prestosql/type/DecimalOperators.java/DecimalOperators/addShortShortShort
class DecimalOperators:    @UsedByGeneratedCode
    public static long addShortShortShort(long a, long b, long aRescale, long bRescale)
    {
        return a * aRescale + b * bRescale;
    }