CISC和RISC都是指令集设计的理念，具体含义如下：CISC，全称为Complex Instruction Set Computing，意为复杂指令集计算。它是一种指令集设计理念，其特点是指令数量多、格式多样、长度不一、功能强大。CISC可以用较少的指令完成较复杂的操作，典型的代表是X86架构。这种架构的处理器芯片被广泛应用于Windows操作系统的服务器...
RISC and CISC are two different types of microprocessor architectures. RISC is a computer microprocessor that uses simple instructions which can be divided into multiple instructions that performs low level operations within a single clock cycle while CISC is a PC processor which utilizes single ...
1.1.1 RISC精简特点 目前处理器芯片指令集分为两种指令架构:CISC和RISC。RISC指令集的每一条指令都有固定的长度,每一条指令只执行特定的一种操作,而CISC的每一条指令长度是不固定的,每一条指令可以执行多条操作。x86指令集属于CISC架构,复杂指令功能译码,数据控制,相关性判断和处理等因素都使得其处理器电路设计异常...
The performance of the RISC processor can depend on the compiler. Because the knowledge of the compiler has a crucial role while translating the CISC code to RISC code. It requires so much complexity in the compiler. 4. CISC CISC is the ancestor approach of CPU design. Because before some ...
CISC-y RISC-ness An unusual type of processor from the early 2000s seemed to offer the best of all worlds—and may be the most inventive approach to the CPU ever developed. By Ernie Smith Apr 26, 2023 Filed under: cisc, computers, crusoe, David A.
A decade later and after introduction of interesting techniques such as fusion of micro-operations in the x86, we set off to compare a recent RISC and a recent CISC processor, the IBM POWER5+ and the Intel Woodcrest. We find that the SPEC CPU2006 programs are divided between those showing...
CISC指令集的特点是指令长短不一：因为那时的内存很小，我们需要最大限度的保存更多的指令，所以指令的...
1977年,DEC推出了VAX,这是其最新、最强大的小型机设计系列。与 IBM 的大型机一样,VAX 具有复杂的指令集 (CISC) 架构,并广泛使用微代码。 由于对微代码的兴趣,Patterson 在马萨诸塞州 Boxborough 的 DEC 小型计算机设施之一积极参与,以帮助处理 VAX 系列微代码中的错误。1979 年秋天,对 VAX 微代码的研究使他...
2001 and entitled “Java Virtual Machine hardware for RISC and CISC Processor.”Claims: We claim: 1. A method for a central processing unit (CPU), comprising: selectively operating decode logic to decode Reduced Instruction Set Computer (RISC) instructions and virtual machine instructions wherein ...
Huang 还表示：他们成功的关键在于 RISC-V 是开放的，不像英特尔芯片的复杂指令集架构 CISC，也不像 ARM 芯片中的 RISC 版本。芯片设计可以解决上述瓶颈。但如果芯片的指令被锁定，瓶颈就很难解决。 为了解释这一点，Huang 还打了个比方。 「我问我儿子为什么他更喜欢三星（智能手机）而不是苹果，他说是因为如果...