what are the tasks of ALU and their subcomponents, Basic Computer Science

ALU’s tasks and their suitable subcomponents:
Addition and subtraction
these two tasks are carried out by constructs of logic gates, such as half adders and full adders. While they may be termed ''adders'', with the aid of they can also carry out subtraction via use of inverters and ''two''s complement'' arithmetic.
The topic of logic gates is too exclusive and detailed to be covered in full here. Many resources survive on the internet and elsewhere relating to this topic, though, so it is recommended that you read further into the areas outlined above to aid with your learning.
Multiplication and division
in most modern processors, the multiplication and division of integer values is controlled by particular floating-point hardware within the CPU. previous processors used either additional chips known as math’s co-processors, or used a completely different method to perform the task.
Logical tests
further logic gates are used within the ALU to perform a number of different logical tests, as well as seeing if an operation produces a result of zero. Mainly of these logical tests are used to then change the values stored in the flag register, so that they may be checked later by separate operations or instructions. Others produce a result which is then stored, and used later in additional processing.
Comparison
Comparison operations contrast values in order to determine such things as whether one number is greater than, less than or equal to another. These operations can be performed by subtraction of one of the numbers from the other, and as such can be handled by the aforesaid logic gates. Though, it is not strictly necessary for the result of the calculation to be stored in this example. The amount by which the values differ is not required. In its place, the appropriate status flags in the flag register are set and checked to find out the result of the operation.
Bit shifting
Shifting operations move bits left or right inside a word, with different operations filling the gaps created in different ways. This is completed via the use of a shift register, which uses pulses from the clock in the control unit to trigger a chain reaction of movement across the bits that make up the word. Once more, this is a quite complicated logical procedure, and additionally reading may aid your understanding.
Posted Date: 5/3/2012 6:49:00 AM | Location : United States







Related Discussions:- what are the tasks of ALU and their subcomponents, Assignment Help, Ask Question on what are the tasks of ALU and their subcomponents, Get Answer, Expert's Help, what are the tasks of ALU and their subcomponents Discussions

Write discussion on what are the tasks of ALU and their subcomponents
Your posts are moderated
Related Questions

NETWORKING AND TELECOMMUNICATIONS: Computers can now communicate with each other and with a range of peripheral devices, over distances with increasing speed and reliability.

Question 1 Briefly explain principles of effective navigation Question 2 Explain the terms URI and URL. Why should you use Relative URI? Question 3 What are the di

how to measure marginal utility.?

Computers One of the most  important invention in the design of digital  circuits  is that  of the general- purpose "stored program" computer or device. Computers are a partic

Subroutine and Functions:  In a program, it is often necessary to repeat a statement or group of statements at several points to accomplish a particular task. Repeating the sa

Question 1 Describe the following- Binary Number System b. Octal Number System Hexadecimal Number System   Question 2 Describe the Canonical Logical Forms-

sum of first 100 integers

Problem 1 Identify important elements of Multimedia and explain with example. Stating important elements of Multimedia with example of each Problem 2 Explain a

They are used to act upon logic operations on the operators. AND OR, NEG NOT TEST XOR AND INSTRUCTION Function: It acts upon the conjunction of the operators bit by bit. Syntax: A