The Function Unit

Abstract

The Function Unit is also called the Arithmetic and Logic Unit (ALU) because it is typically capable of performing arithmetic operations and logic operations. The Function Unit of SDC can perform the operations necessary to enable SDC to execute the ADD, SUB, MPY, DIV, AND and OR instructions of table 1.4. Thus the Function Unit is able to perform the following operations between the integer or bit pattern in the ACC and another brought from the Memory:

addition, subtraction, multiplication, division and, or on pairs of corresponding bits of their operands Figure 10.1 shows the inputs and outputs of the Function Unit.