Intermediate Software Designer Exam Preparation---Computer Composition and Architecture 2

① CISC and RISC

CISC and RISC are two different computer instruction set architectures.

• CISC（Complex Instruction Set Computing）是complexAn instruction set computer whose instruction set architecture includeslots of instructions, each instruction can perform multiple operations, including operating registers, memory, I/O, etc.Multiple addressing supportedWay. The advantage of the CISC architecture is that the instruction set is rich and complex operations can be completed, but the disadvantage is that the instruction set is too complex, resulting in difficult hardware design, long development cycle, and low execution efficiency.
• RISC（Reduced Instruction Set Computing）是streamlineAn instruction set computer whose instruction set architecture contains onlyfew instructions, each instruction can only perform one operation, usually only registers are operated, and operations such as memory and I/O are passed through registers.Addressing mode supports few ways. The advantage of the RISC architecture is that the instruction set is simple and the execution efficiency is high, but the disadvantage is that it cannot complete complex operations and needs to combine multiple instructions