Arithmetic and logic unit, Basic Computer Science

Assignment Help:

Arithmetic and Logic Unit:

The Arithmetic and Logic Unit is that part of the CPU that actually performs arithmetic and logical operations on data. The CU, CPU registers and memory help in bringing the data into the ALU and then taking the results back.   Figure 2.5 presents the ALU inputs and outputs.   

871_Arithmetic and Logic Unit.png

Data are presented to ALU in registers and the results are also stored in registers. Accumulator is one such register which is very frequently used during the ALU operation. ALU has many other registers such as flags and status register, which indicate information about the operation and its result. ALU has logic implemented to perform operations like addition, multiplication, division, shifting, complement etc. The operations are performed on represented numbers, both integer and floating point numbers.  Modern processors nowadays have two identifiable trends which improve their performance to a much higher level. These are use of on chip Cache memory and having more than one processor core on the same IC chip. Cache memory is a fast semiconductor memory which can be used to temporarily store instructions and data that are frequently referred by the processor. By having  frequently referred instructions and data available in the processor, the wait cycles introduced due to memory references are minimized and hence the processor performance improves a lot. Another modern technique of having more than one processor core on the same IC chip tries to perform the execution of instructions in parallel and hence the performance of the processor improves a lot.     


Related Discussions:- Arithmetic and logic unit

In-door patient department, In-door Patient Department Ideally all ...

In-door Patient Department Ideally all features of OPD.  Both OPD and IPD modules should be inter-linked.  In addition all details pertaining to the patient's medica

Gui design, how to load a video using push button in gui design click

how to load a video using push button in gui design click

Wap and wml, what is charactersics of mobile computing

what is charactersics of mobile computing

Operating system services, Operating system services: In this section ...

Operating system services: In this section we consider basic services supported by an operating system. There are many building blocks to be considered, not all of which will

Variables and constants, Variables and Constants: These are the smalle...

Variables and Constants: These are the smallest components of a programming language.  For writing a program, one must know how to use the internal memory of a computer. A Com

Explain initial dynamic model with example, Question 1 Explain initial dyn...

Question 1 Explain initial dynamic model with example Question 2 Discuss the importance of object orientation during system development Question 3 Distinguish between Ob

What is blu-ray disk, Question 1 Explain the configuration steps involved ...

Question 1 Explain the configuration steps involved in CMOS setup Date and time Error halt Floppy drive A Halt on Hard disk C HDD Delay Keyboard Memory

Stable marriage Problem, How to make a stale marriage program by implementi...

How to make a stale marriage program by implementing the Gale Shapley algorithm using Java program

Functions, difference between recursion and iteration

difference between recursion and iteration

An e-mail account, An E-Mail Account: Inbox: Inbox is the main folder ...

An E-Mail Account: Inbox: Inbox is the main folder in your email account. It contains all the e-mails that have arrived in your e-mail account. You can click on inbox to see t

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