Q) Write down the comparison between RISC and CISC?
Answer:
RISC CISC
It is a software-based architecture. It is a hardware-based architecture.
It uses more registers. Uses fewer registers compared to RISC
It uses only a hardwired control unit and has Uses both hardwired and
fixed size instructions. micro-programable control units, and has
variable size instructions.
Instructions are in the size of one word and Instructions are larger than the size of one
executed in a single clock cycle. word, and executed in more than one clock
cycle.
Only Register to Register arithmetic Here register to register, memory to
operations is possible. memory, and register to memory
arithmetic operations are possible.
Large size code Small size code
Step-By-Step explanations:
Reduced Instruction Set Architecture, or RISC, refers to a type of microprocessor built to
execute a limited set of instructions. Every clock cycle in this case should be used to
implement one instruction.
CISC means Complex instruction set architecture, which minimizes the number of
instructions per cycle, at the cost of an increase in the number of cycles per instruction. This
single instruction has handled the evaluation, loading, and storing of information like a
multi-tasker, by using multiple commands hence it is a complete structure.
Answer:
RISC CISC
It is a software-based architecture. It is a hardware-based architecture.
It uses more registers. Uses fewer registers compared to RISC
It uses only a hardwired control unit and has Uses both hardwired and
fixed size instructions. micro-programable control units, and has
variable size instructions.
Instructions are in the size of one word and Instructions are larger than the size of one
executed in a single clock cycle. word, and executed in more than one clock
cycle.
Only Register to Register arithmetic Here register to register, memory to
operations is possible. memory, and register to memory
arithmetic operations are possible.
Large size code Small size code
Step-By-Step explanations:
Reduced Instruction Set Architecture, or RISC, refers to a type of microprocessor built to
execute a limited set of instructions. Every clock cycle in this case should be used to
implement one instruction.
CISC means Complex instruction set architecture, which minimizes the number of
instructions per cycle, at the cost of an increase in the number of cycles per instruction. This
single instruction has handled the evaluation, loading, and storing of information like a
multi-tasker, by using multiple commands hence it is a complete structure.
