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ARITHMETIC LOGIC UNIT

GROUP 14

SOURASISH CHAKRABORTY (2029117)

TUSHAR PAL (2029119)

PRABHAV MISHRA (2029137)

ABHISHEK KUMAR SINGH (2029156)

An arithmetic

logic unit (ALU) is a combinational digital circuit. It's part of a central processing unit that carries out arithmetic and logic operations on the operands in computer instruction words.

Arithmetic Logic Unit

The ALU is divided into two units: an arithmetic unit (AU) and a logic unit (LU).

1. FIXED POINT OPERATIONS

2. FLOATING POINT OPERATIONS

FIXED POINT OPERATIONS

ALU OPERATIONS

OR

XOR

NOT

L-SHIFT

R-SHIFT

ADD

ADD WITH CARRY ADD

SUBTRACT

MULTIPLY

SUBRACT WITH BORROW

FLOATING POINT OPERATIONS

F ADD F MUL

F DIV FSUB

CONCEPTUAL DIAGRAM OF ALU

DATA REGISTER

(DR)

ALU OUTPUT

CONTROL INPUT

ARITHEMATIC LOGIC UNIT (ALU)

ACCUMULATOR REGISTER

(AC)

A

ARITHMETIC

Y

LOGIC UNIT

B

S

A B

ARITMETIC

UNIT

Y

4: 1

MUX

LOGICAL

LOGICAL

UNIT

SELECT LINES

A B

SELECT LINES

OPERATIONS

CONNECTED TO MULTIPLEXER

FULL

ADDER

0

1

A+B

A-B

C

SELECT LINE

OPERATIONS

A B

C

O

N

N

E

C

T

E

D

T

O

M

U

L

T

I

P

L

E

X

E

R

011

100

101

AND

OR

NOT

OPERATIONS

SELECT LINES

In electronics, a multiplexer, also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed by a separate set of digital inputs known as select lines.

000

001

010

011

100

101

110

111

0

A+B

A-B

A&B

A|B

~A

NOP

NOP

TINKER CAD

EDA

REFRENCES

(1)

https://whatis.techtarget.com/definition/arithmetic-logic-unit-ALU

(2)

https://youtu.be/IPnYBgCmTCA

(3)

https://youtu.be/VgSbiNRIpic

(4)

https://youtu.be/0Pbw-GS7-x0

ANY QUESTIONS ?

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