presto-main/src/main/java/io/prestosql/type/DoubleOperators.java/DoubleOperators/xxHash64
class DoubleOperators:    @ScalarOperator(XX_HASH_64)
    @SqlType(StandardTypes.BIGINT)
    public static long xxHash64(@SqlType(StandardTypes.DOUBLE) double value)
    {
        return XxHash64.hash(Double.doubleToLongBits(value));
    }