The simplest way to examine the advantages and disadvantages of RISC architecture is by contrasting it with it's predecessor: CISC (Complex Instruction Set Computers) architecture. Multiplying Two Numbers in Memory

A complex instruction set computer (CISC / ˈ s ɪ s k /) is a computer architecture in which single instructions can execute several low-level operations (such as a load from memory, an arithmetic operation, and a memory store) or are capable of multi-step operations or addressing modes within single instructions.

RISC（reduce instruction set computer）是精简指令系统计算机的简称，这就是人们为了解决 CISC 中的“指令浪费现象”提出的解决方案。 RISC 显然是一种更加优化的架构方式，设计理念和思想都比 CISC 有着巨大的优势，它的精髓就在于这种架构方式实现了用较少指令完成程序执行的功能，由于其中使用了 流水线 的结构，使得很大一部分指令可以在一个时钟周期内被执行完毕，这样计算机的性能就大大的得到了提高。 再者就是，由于采用微处理器的模式导致指令数量大 …

CISC vs RISC. p49， complex instruction set computing. For example, a complex instruction set computing (CISC) chip may be able to move a large block of data, perhaps a string consisting of several thousand bytes, from one memory location to another without using any of the CPU’s internal storage.

Because processor speeds have increased, CISC chips are now able to execute more than one instruction within a single clock. This also allows CISC chips to make use of pipelining. With other technological improvements, it is now possible to fit many more transistors on a single chip.

2023年2月14日 · RISC (reduced instruction set computer) and CISC (complex instruction set computer) refer to the popular processor architectures that utilize different data processing instruction sets to perform basic logical and input/output operations. Each architecture has its own set of pros and cons.

CISC, which stands for “Complex Instruction Set Computer”, is a computer architecture where single instructions can execute several low-level operations, for instance, “load from memory an arithmetic operation, and a memory store). CISC processors are also capable of executing multi-step operations or addressing modes with single ...

2024年3月24日 · The performance of RISC processors is often two to four times than that of CISC processors because of simplified instruction set. This architecture uses less chip space due to reduced instruction set. This makes to place extra functions like floating point arithmetic units or memory management units on the same chip.

2022年7月7日 · AMD CPUs use a hybrid CISC/RISC architecture since their 5th generation CPUs (namely K5). Intel started using this approach only from their 6th generation CPUs on. The processor must accept CISC instructions, also known as x86 instructions, since all software available today is written using this kind of instructions. Is Intel 8086 CISC or RISC?

2023年7月22日 · Which is better: RISC vs. CISC? The quick answer is that no architecture is superior to another. Each has advantages and disadvantages that make them better suited to specific settings.