Computer Organization & Architecture · topic
Ripple-carry and carry-lookahead adders with gate-delay counts, the adder-subtractor, overflow logic and flags, array and Booth multiplication, shifters, and the single-bus and three-bus datapaths with the register transfers and control steps of fetch and execute.
The arithmetic logic unit (ALU) is the combinational block of the datapath that performs integer arithmetic (add, subtract, compare), bitwise logic (AND, OR, XOR, NOT) and shifts on two operands, under the control of a function-select input, and reports the outcome in condition flags.
The datapath is the part of the processor that holds and moves data: the registers, the ALU, the internal buses and the connections to memory.
One-page visual sheets for this topic, in the sheet library on the store. Previews are free; the full sheets come with the subject pack.
