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 basic cpu structure, A computer manipulates data consistent with in...

A computer manipulates data consistent with instructions of a stored program. Stored program means that the data and program are stored in same memory unit. Central processing unit

What is input-output processors, Q. What is Input-output processors? le...

Q. What is Input-output processors? let's briefly summarize the development in area of input/output functions. These can be briefed as below: 1. CPU directly controls a peri

Program which take input two images by homography, The goal of this questio...

The goal of this question is to create a program that takes as input two images that are related by a homography, and which "warps" the second image (piscine2.bmp) to align with th

What is arrays pointers, Q. What is Arrays Pointers? An array is a coll...

Q. What is Arrays Pointers? An array is a collection of similar type of data. Arrays are extremely popular data structures in parallel programming because of their easiness of

What is analysis and list its sub stages, What is analysis, list its sub st...

What is analysis, list its sub stages? Understand the requirement by constructing models. The goal of analysis is to state what need is to be done and not how it is to be done.

IEEE802.4 Token Bus Network, en a five station token bus LAN with station a...

en a five station token bus LAN with station addresses of 3000, 500, 100, 70, and 50. Stations with addresses of 5000, 4000, 400, 90, and 60 are waiting to enter the ring. Assume a

Operating systems, Consider the state transition diagram of Figure 3.9b . S...

Consider the state transition diagram of Figure 3.9b . Suppose that it is time for the OS to dispatch a process and that there are processes in both the Ready state and the Ready/S

How can you have an accession number, Accession number (bioinformatics), a ...

Accession number (bioinformatics), a unique identifier given to a biological polymer sequence (DNA, protein) when it is given to a sequence database.

What is event-based simulator, Event-based Simulator Digital  Logic  S...

Event-based Simulator Digital  Logic  Simulation  method  sacrifices  performance  for  rich  functionality:  each active signal  is  calculated  for  every  device  it  propa

Micooperation, please suggest me ,how to write microopertions,and study for...

please suggest me ,how to write microopertions,and study for computer architecture

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