Processor architectures are generally classified into two main types: RISC and…
Processor architectures are generally classified into two main types: RISC and CISC. Differentiate between Reduced Instruction Set Computing (RISC) and Complex Instruction Set Computing (CISC) ?
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Processor architectures are mainly classified into RISC and CISC based on instruction complexity and execution approach.
Basis | RISC (Reduced Instruction Set Computing) | CISC (Complex Instruction Set Computing) |
Instruction Set | Uses small and simple instruction set | Uses large and complex instruction set |
Instruction Length | Fixed-length instructions | Variable-length instructions |
Execution Time | Most instructions execute in single clock cycle | Instructions may take multiple clock cycles |
Memory Access | Uses load/store architecture (memory accessed only by load/store) | Instructions can directly access memory |
Control Unit | Uses hardwired control, faster | Uses microprogrammed control, slower |
Registers | Large number of registers | Fewer registers |
Performance Focus | Optimized for speed and pipelining | Optimized for code compactness |
Examples | ARM, MIPS | Intel x86 |
Example: Smartphones use RISC-based ARM processors for efficiency, while desktop computers commonly use CISC-based Intel processors.