presto-spi/src/main/java/io/prestosql/spi/type/UnscaledDecimal128Arithmetic.java/UnscaledDecimal128Arithmetic/setNegativeInt
class UnscaledDecimal128Arithmetic:    private static void setNegativeInt(Slice decimal, int v3, boolean negative)
    {
        if (v3 < 0) {
            throwOverflowException();
        }
        setRawInt(decimal, SIGN_INT_INDEX, v3 | (negative ? SIGN_INT_MASK : 0));
    }