Explain about RISC architecture, Computer Engineering

Assignment Help:

Q. Explain about RISC ARCHITECTURE?

Let's first list some significant considerations of RISC architecture:

1. RISC functions are kept simple unless there is a very good reason to do otherwise. A new operation which increases execution time of an instruction by 10 per cent can be added only if it decreases size of the code by at least 10 per cent. Even greater reductions might be necessary if the extra modification requires a change in design.

2. Micro-instructions stored in CU cannot be faster than simple instructions because the cache is built from same technology as writable control unit store, a simple instruction can be executed at same speed as that of a micro-instruction.

3. Microcode is not magic. Moving software into microcode doesn't make it better; it only makes it harder to change. Runtime library of RISC has all characteristics of functions in microcode, except that it's easier to change.

4. Simple decoding and pipelined execution are more significant than program size. Pipelined execution gives a peak performance of one instruction each step. The longest step determines the performance rate of pipelined machine so ideally every pipeline step must take same amount of time. 

5. Compiler must simplify instructions instead of generate complex instructions. RISC compilers try to eliminate as much work as possible at the time of compile time so that simple instructions can be used. For illustration RISC compilers attempt to keep operands in registers so that simple register-to-register instructions can be used. RISC compilers keep operands which will be reused in registers instead of repeating a memory access or a calculation. They consequently use LOADs and STOREs to access memory so that operands aren't implicitly discarded after being fetched.


Related Discussions:- Explain about RISC architecture

Non repudiation, What is non-repudiation? how can it be achieved in designi...

What is non-repudiation? how can it be achieved in designing e-cash based system?

With respect to security which is the better .net or j2ee, With respect to...

With respect to security, which one is the better choice?.Net or J2EE? Explain? As per majority programmers .NET is the best one which have one vendor compare to, the ease of

What is hamiltonian path, What is Hamiltonian path?  A Hamiltonian path...

What is Hamiltonian path?  A Hamiltonian path in a directed graph G is a directed path that goes through every node exactly once. We consider a special case of this problem whe

Explain how the server control validation controls work, Briefly explain ho...

Briefly explain how the server control validation controls work? A validation control works by evaluating the value of an input server control on the page to see whether it me

Fundamental functional units of a computer, Fundamental functional units of...

Fundamental functional units of a computer: QUE. What are the fundamental functional units of a computer? Ans: A computer consists of 5 functionally independent major parts

what is polymorphism in c++, Polymorphism in C++ is the idea that a base c...

Polymorphism in C++ is the idea that a base class can be inherited by various classes. A base class pointer can point to its child class and a base class array can store dissimilar

Define variants of turing machine, Define variants of Turing Machine?  ...

Define variants of Turing Machine?  Variants are  Non deterministic turing machine.  Mutlitape turing  machine.  Enumerators

Discuss the csma/cd and csma/ca protocols, Discuss the CSMA/CD and CSMA/CA ...

Discuss the CSMA/CD and CSMA/CA protocols. CSMA/CD: this is an access method used mainly with LANs configured in a bus topology. Along with CSMA/CD, any station (node) can se

Find 9''s compliment of bcd number using 4-bit binary adder, Design a circu...

Design a circuit for determining the 9's compliment of a BCD number by using 4-bit binary adder and some external logic gates? Compliment of a BCD number 9's co

How the information can be stored, In a RAM, information can be stored ? A...

In a RAM, information can be stored ? Ans. RAM is used by the user, number of times.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd