subtraction and multiplication of integers and
bit-wiseCPU's instruction decode logic determines which particular
operation the ALU should perform, the source of the
operandsand the destination of the result.
The width in
bits of the words which the ALU handles is
usually the same as that quoted for the processor as a whole
operations are usually done by a separate "
floating-pointunit". Some processors use the ALU for address calculations
separate logic for this.
(1995-03-24)