Integer Overflow

An integer overflow exception is generated when the result of an integer operation causes a carry-out of the most significant bit of the result, which is not the same as the carry-into of the most significant bit of the result. For example, the addition of two positive integers produces a negative result. On the Intel 80387 processor, this corresponds to overflow trap (#4), caused by executing an INTO instruction with the OF flag set. This exception is continuable.