Micro architecture for a microprocessor or microcontroller arithmetic logic unit has an optimized architecture in comparison with existing architectures

摘要

Micro architecture of an arithmetic logic unit for replacing in an equivalent manner a micro architecture comprising two N bit adders in cascade to provide a result in N bits in an accumulator. Replacement micro architecture comprises a backup adder (11) followed by an adder (4), the adders and accumulator being extended to N+1 bits in a circuit for determination of the remainder (C39) associated with a result supplied by the first architecture.