Difference between CISC and RISC
In this tutorial, we are going to see the major difference between CISC vs RISC computers.
CISC stands for Complex Instruction Set Computer
RISC stands for Reduced Instruction Set Computer
Given below are the major differences:
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CISC
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RISC
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Clock per instruction (CPI) lies between 1 and 15
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Clock per instruction (CPI) lies between 1 and 2
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It consists mostly micro-programmed control units
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It consists mostly hardwired control units
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Most of the instruction in CISC is manipulated in memory
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All operation of RISC is executed within registers of the CPU
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A large number of instruction types are used, 100-250 instructions
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Relatively few number of instruction types are used, typically less than 100
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A large number of addressing modes are used (5-15 addressing modes)
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Relatively fewer addressing modes are used in RISC (less than 6)
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CISC has variable length instruction formats
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RISC has fixed length instructions formats
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Small number of general-purpose registers are used in CISC
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Large number of general-purpose registers are used in RISC
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About the Author
Sonu Pandit
Technology geek, loves to write and share knowledge with the world. Having 10+ years of IT experience. B.Tech in Computer Science & Engineering
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Published Date :
Jul 05,2020
