presto-spi/src/main/java/io/prestosql/spi/type/UnscaledDecimal128Arithmetic.java/UnscaledDecimal128Arithmetic/isStrictlyNegative
class UnscaledDecimal128Arithmetic:    public static boolean isStrictlyNegative(long rawLow, long rawHigh)
    {
        return isNegative(rawLow, rawHigh) && (rawLow != 0 || unpackUnsignedLong(rawHigh) != 0);
    }