Reduced instruction set computer - risc, Computer Engineering

Assignment Help:

Reduced Instruction Set Computer (RISC):

As we discussed before most of the modern CPUs are of the GPR (General Purpose Register) type. A few instances of such type of CPUs are the, IBM 360, Intel 80x86 ,Motorola 68xxx and DEC VAX But as these CPUS were obviously better than previous accumulator and stack based CPUs they were yet lacking in various areas:

1. The instructions were of varying length from 1 byte to 6-8 bytes. It is reason of problems with the pre- fetching and pipelining of instructions.

2. ALU (Arithmetic Logical Unit) instructions could have operands that were memory locations. Since the number of cycles it takes to access memory varies so does the all instruction. It isn't good for pipelining, compiler writers and several multiple issues.

3. Most of the ALU instruction had only 2 operands where 1 of the operands is also the destination. It means this operand is cracked in the time operation or it ought to be saved before somewhere.

Therefore in the early 80's the idea of RISC was come. The SPARC project was begun at Berkeley and the MIPS project at Stanford. RISC means Reduced Instruction Set Computer. The ISA is composed of instructions that all have accurately the similar size, typically 32 bits. so they can be pipelined  and pre-fetched and successfully. All of the ALU instructions have 3 operands which are just registers. Only memory access is throughout explicit LOAD/STORE instructions. Therefore A = B + C can be assembled as:

LOAD   R1, A

LOAD   R2, B

ADD     R3, R1, R2

STORE C, R3


Related Discussions:- Reduced instruction set computer - risc

Explain garbage collection, Explain Garbage collection In this method ...

Explain Garbage collection In this method two passes are made over the memory to identify new areas. In the first pass it traverses all pointers pointing to allocated areas an

What is artificial intelligence language processing, Artificial intelligenc...

Artificial intelligence language processing (AILP) is a field of computer science and linguistics concerned with the interactions among computers and human (natural) languages; it

Parallel edge or self loop of the total number of edges, A graph with n ver...

A graph with n vertices will definitely have a parallel edge or self loop of the total number of edges are More than n(n-1)/2

Explain data warehousing, data warehousing Data warehouse means  ...

data warehousing Data warehouse means  Subject oriented Integrated Time variant Non-volatile collection of data for management's decisions. It is h

What is the session, What is the session.  Session is a collection of v...

What is the session.  Session is a collection of various groups of method. Every session is assigned to a single control terminal. This terminal is either a pseudo-device. or a

Pd controller, PD controller Student should aim for Kp and Kd value that...

PD controller Student should aim for Kp and Kd value that will minimize the steady error with improved rise time and settling time. The amount of over shoot should not be more t

Write the html code to web page to insert an image, Write the HTML code to ...

Write the HTML code to accomplish the web page to insert an image onto a page using good.gif as image and having "welcome" as the ALT text. The HTML code to accomplish the web

Convert the following into sop form, Q. Convert the following into SOP form...

Q. Convert the following into SOP form   1. (A+B) (B'+C) (A'+ C) 2. (A+C) (AB'+AC) (A'C'+B) 3. (A'+B') (C'+B)   Q.Convert the following into POS form   1. WYZ + XYZ + W'X'

Differentiate between string constants & character constants, Computer Conc...

Computer Concepts & C Programming 1. Write a program to read four floating point numbers and find their sum and average. 2. What is the difference between string constants a

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