Instruction Set Semantics
Most general is the three address instruction set:
result = operand1 operator operand2 ^44cfb5
Two address instruction sets use one of the operand addresses for the result.
One address instruction sets have a fixed register for one operand and the result, usually known as the accumulator.
Zero address instruction sets work by popping arguments from a stack in main memory and pushing the results back.
Modern RISC designs are three address instruction sets. One address instruction sets are found in DSPs (Digital Signal Processors).