Differentiate between CISC and RISC architectures.

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The difference between RISC and CISC are

RISC CISC
Focus on software Focus on hardware
Uses only Hardwired control unit Uses both hardwired and micro programmed control unit
Transistors are used for more registers Transistors are used for storing complex
Instructions
Fixed sized instructions Variable sized instructions
Can perform only Register to Register Arithmetic operations Can perform REG to REG or REG to MEM or MEM to MEM
Requires more number of registers Requires less number of registers
Code size is large Code size is small
An instruction execute in a single clock cycle Instruction takes more than one clock cycle
An instruction fit in one word Instructions are larger than the size of one word
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