Difference Between RISC and CISC Architecture

Difference Between RISC and CISC Architecture, CISC architecture, RICS architecture

CISC
RISC
In CISC computer architecture there is large set of instructions available.
Large set of instruction variable formats (16-64 bits/inst)
In RISC architecture small set of instruction with fixed (32 bit) format and most register based instruction
There is CISC architecture lots of addressing modes are available so we can do lots of operation using different addressing modes.
There in RICS architecture least number of addressing modes so we can perform least number of operation
12-24 addressing modes are available in CISC.
3-5 addressing modes are available in RISC.
General purpose register and cache design 8-24 GPRs , mostly with unified cache
General purpose register and cache design 32-192 GPRs, with split cache(data and instruction)
Clock rate and CPI 33-50 MHzCPI   2-15
Clock rate and CPI 50-150MHzCPI <1.5
It is based on Micro programmed control unit
It is based on Hardwired control unit

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