Implementation of a simple arithmetic, Computer Engineering

Assignment Help:

Q. Implementation of a Simple Arithmetic?

So, by now we have concerned how logic and arithmetic micro-operations can be applied individually. If we combine these 2 circuits along with shifting logic then we may have a possible simple structure of ALU. Basically ALU is a combinational circuit whose inputs are contents of specific registers. ALU performs desired micro-operation as decided by control signals on input and places results in an output or destination register. Whole operation of ALU can be performed in a single clock pulse as it's a combinational circuit. Shift operation can be performed in a separate unit however sometimes it can be made as a part of overall ALU. The following diagram gives a simple structure of one stage of an ALU. 

2018_Implementation of a Simple Arithmetic.png

One stage of ALU with shift capability

Please note that in this diagram we have given reference to two previous figures for arithmetic and logic circuits. This phase of ALU has two data inputs; the ith bits of registers to be manipulated. But the (i - 1)th or (i+1)th bit is also fed for case of shift micro-operation of only one register. There are 4 selection lines that determine what micro-operation (arithmetic, logic or shift) on the input. The Fi is resultant bit after desired micro-operation. Let's see how value of Fi changes on the foundation of four select inputs. This is displayed in Figure below:

Please note that in Figure below arithmetic micro-operations have both S3 and S2 bits as zero. Input Ci is significant for only arithmetic micro-operations. For logic micro-operations S3, S2 values are 01. Values 10 and 11 cause shift micro-operations.

For this shift micro-operation S1 and S0 values and Ci values don't play any role. 

950_Implementation of a Simple Arithmetic1.png

Figure: Micro-operations performed by a Sample ALU


Related Discussions:- Implementation of a simple arithmetic

Explain programmer visible registers, Q. Explain Programmer Visible Registe...

Q. Explain Programmer Visible Registers? These registers can be accessed employing machine language. In general we encounter four kinds of programmer visible registers.

How do you import data from one more access database, The process of import...

The process of importing data from one more Access database follows these common steps they are. ? Preparing the document for import operation and make ensure that extensions ar

Explain characteristics of program translation model, Explain characteristi...

Explain characteristics of program translation model. The program translation model characteristics are: A program should be translated before this can be executed.

By which many computers are connected in geographical area, A large numbers...

A large numbers of computers in a wide geographical area can be efficiently connected using? A large numbers of computers in a broad geographical area can be efficiently linked

C++, a program to find the area under the curve y = f(x) between x = a and ...

a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can be foun

Define virtualisation and explain computer architecture, Rentrag has decide...

Rentrag has decided to replace all of the computers currently being used by all of the business and office staff. He has asked you to recommend a set of specification for computers

Determine through which symbolic names can be associated, Determine Symboli...

Determine Symbolic names can be associated with Symbolic names can be associated with the data or instruction

Define memory utilization factor, Memory utilization factor shall be comput...

Memory utilization factor shall be computed as? Ans. memory in use/total memory connected.

Sorting circuit along with odd-even merging circuit, Q. Sorting Circuit alo...

Q. Sorting Circuit along with Odd-Even Merging Circuit? The merge sort algorithm needs two circuits which imply that one circuit for merging and another circuit for sorting the

What is efi framework, The Extensible Firmware Interface (EFI) is a specifi...

The Extensible Firmware Interface (EFI) is a specification that defines a software interface among an operating system and platform firmware. EFI is intended as a significantly imp

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