Oversized data detection hardware for data processors which store data at variable length destinations

Abstract From the Canadian patent

Abstract of the Disclosure, Size exception detection hardware for use with a digital data processor arithmetic unit for providing high-speed detection of lost data which results from storing an arithmetic result in a destination which is smaller than one or both of the source operands. In response to data processing machine instructions, the arithmetic unit performs arithmetic operations on variable length operands and sends the arithmetic results to variable length destinations. The operand and destination lengths are specified by length fields in the machine instruction. The destination length is specified independently of at least one of the operand lengths and hence may be less than …