# What is Arithmetic Logic Unit?

# What is Logic?

Logic is the science of correct thinking. A classic definition is new and necessary reasoning. It's new because you didn't know the item before, and necessary because a correctly formulated syllogism has to be true if the bases are true. This syllogism is a well-known example: All men are m…ortal. Socrates is a man. Therefore, Socrates is mortal. We took two axioms and made a new and necessary conclusion. (MORE)

# What is the function of Arithmetic Logic unit?

The arithmetic-logic unit (ALU) performs allarithmetic operations (addition, subtraction,multiplication, and division) and logic operations.Logic operations test various conditions encounteredduring processing and allow for different actions to betaken based on the results. The data required to perf…ormthe arithmetic and logical functions are inputs from thedesignated CPU registers and operands (MORE)

# What is arithmetic?

Arithmetic is the process of applying the four basic operations:addition, subtraction, multiplication and division to numbers.

# What is an arithmetic logic unit?

The arithmetic logic unit, or ALU, is the portion of the CPUresponsible for integer arithmetic. It also handles most logicaloperations.

# Compare java arithmetic and logic operators with c arithmetic and logical operators?

They are very similar,but when we do logic operators there are still some differences.In c or c plus plus ,logic true can be expressed as'true' or '0',but in java,true is just 'true'.If you gave a zero,it will treat it as type of integer ,and so as false.

# The component of the processor that performs arithmetic comparsion and logical operations?

The arithmetic logic unit is a digital circuit that is part of theCPU. Its main functions are to do arithmetic and logic operations.

# What is difference between the arithmetic operation and logical operation?

An arithmetic operation combines two numbers while a logicaloperation uses two logical values which can be true or false. Thearithmetic operation uses adding or subtraction to reach thecorrect answer.

# What is meant by Arithmetic Logic Unit?

Before the developement of micro-processers and micro-computers, a computer was divided into functional units, e.g. reader, punch, bulk memory etc. These were all "peripherals", gathered around and connected to a CPU..
A CPU was a central processing unit, consisting of control, memory, instruction …interpreter, input / output and ALU..
The ALU or Arithmetic Logic Unit was the very heart of the computer. A simple ALU could add, negate, compare (which of two numbers is greater or are they equal,), shift left, shift right, increment or decrement. It could also cause the computer to jump to a different part of the program, rather than go on to the next instruction in strict sequence. Most important of all was the ability to make a conditional jump, changing the order in which instructions were executed only if ( perhaps if not ) some condition was true..
A computer with an ALU like this could subtract, multiply or divide by following a short sequence of instructions, but it was time consuming. Today's ALU can do things like these by hardware, built in. In a modern computer, the ALU, a very powerful entity, is integrated inside the main computer chip. It performs all the above functions and many more besides. (MORE)

# The logic unit is the part of the CPU which performs all of the calculations?

no calculation are happening in arithmetic unit,logical operations in logic unite. both happening in ALU,

# What is the difference between arithmetic operations and logical operations?

Arithmetic operations act on the values of numbers or expressions. Logical operations act on the truth-values of statements or equations.

# Difference between an arithmetic shift operation and a logical shift operation?

Instead of being filled with all 0s, as in logical shift, when shifting to the right, the leftmost bit (usually the sign bit in signed integer representations) is replicated to fill in all the vacant positions (this is a kind of sign extension).

# Vectors having same units but different directions can be added by rules of simple arithmetic?

Yes. Given A= Iax +J ay +K AZ and B= Ibx + Jby +K bz then, A+B= I(ax + bx) + J(ay + by) + K(AZ + bz).

# How an ALU differentiate between arithmetic and logic?

It doesn't have to. The ALU is given one or two inputs and is told what operation to perform on them. It has no need to figure out whether that operation is arithmetic or logic, since each individual operation will be different anyway.

# The control unit and the arithmetic are located in the?

The arithmentic logic unit (ALU) and the control unit are located inside the central processing unit (CPU).

# What is responsible for performing arithmetic and logical instructions in a computer?

Microprocessor has a component known as ALU(arithmatic and logical unit) whcih is used to perform operations such as .
arithmetic includes-add,sub,mul(8086),div(8086) .
logical operations include-LOGICAL AND,LOGICAL OR,X-OR .
all thsi operations is perofrmed inside the ALU itself with the help of… other components such as control unit and registers used as for the storage purposes .
Anand bhat(mca@kiit-870024) (MORE)

# What is the difference between control unit and arithmetic logic unit?

There is a big difference between these components. Both of them are part of central processor unit but control unit is responsible for generating control signals to all parts of cpu, to handle interrupts, to deal with registers etc. Arithmetic logic unit is part which does arithmetic and logic oper…ations (for example, arithmetic operations are add,subtract,add with carry,subtract with carry,divide... and logic operations are AND,OR,XOR,NOT,NAND,NOR...). (MORE)

# What is meant by arithmetic and logical operators?

Arithmetic Operators .
Arithmetic operators do exactly what they say, they perform simple arithmetic operations such as addition and subtraction. All arithmetic operators are binary operators, thus they all accept two input values (an lvalue and an rvalue) and output one value, the evaluation of th…e lvalue and rvalue..
+ (addition) .
- (subtraction) .
(multiplication) .
/ (division) .
% (modulus) [returns the remainder of a division] .
Logical Operators .
Logical operators are a little more complex to explain, but they are actually just primitive operators that can be used in combination to produce more complex operators. Logical operators can be split into two categories: unary operators and binary operators. A unary operator has just one input, while a binary operator has two inputs. Logical operators are also known as bitwise operators because each operates upon corresponding bits of the operands. Since they operate at the bit-level, they are also known as boolean operators. An individual bit can only be 0 or 1 (false or true) thus we can build simple truth tables to determine what the output bit will be for any given input bit..
Logical NOT .
The logical NOT operator is the simplest operator to understand because it is a unary operator and therefore has only one input. It's sole purpose is to invert the input value on a bit-by-bit basis to produce an output. Since an input bit can only ever be 1 or 0, the NOT truth table is relatively simple:.
input 0 1.
output 1 0.
Each bit of an input is handled separately according to this table. Thus NOT(00000000) will output 11111111, while NOT(11111111) will output 00000000. Likewise, NOT(10101100) would output 01010011. .
Inside your computer you will actually have at least 32 logical NOT circuits that operate simultaneously, thus allowing multi-bit values to be handled as a single operation. That is, each individual circuit operates upon one bit of the input..
Logical Binary Operators .
Since binary operators have two inputs, the truth tables are a little more complex than that of the NOT operator. The two inputs are typically represented by the values p and q. The simplest operator is the AND operator, which has the following truth table:.
p q output.
0 0 0.
0 1 0.
1 0 0.
1 1 1.
You will note that the output is true only when both inputs are true. You will also note that there are four possible outputs for any two inputs. Thus with four possible outputs, there has to be 16 possible combinations of output. And in order to represent all possible outputs we therefore need 16 logical bitwise operators, of which the AND operator is just one..
Thus the complete truth table for all logical binary operators is as follows:.
p q 0 1 2 3 4 5 6 7 8 9 A B C D E F 0\n0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0\n1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1\n0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1\n1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 .
The outputs are represented by the hexadecimal values 0 through F. If you read down a column you will note that the combined bit values correspond to the column header. Thus the AND operator, with outputs 0001, is represented by column 1..
Columns 6 and 7 are the most interesting of the remaining columns as column 7 represents the logical OR operator while column 6 is the logical XOR operator (exclusive OR). Along with AND, these are the only three logical operators that are actually required. You might ask why we don't have operators for the remaining 13, but we do -- it's just that we don't have any specific operators for them. We simply combine the AND, OR and XOR operators with the unary NOT operator in order to achieve them..
In actual fact, the last 8 operators are simply the inverse of the first 8 (column F is the inverse of column 0, column E is the inverse of column 1, and so on). Thus NOT( p AND q ) produces the results shown in column E. This particular operator is commonly called the NAND operator. By the same token, column 8 is the NOR operator and column 9 is the XNOR operator. Most languages do not provide these specific operators but we can reproduce them using NOT with AND, OR and XOR respectively..
Columns 0 and F (the contradiction and tautology operators, respectively) are essentially redundant since they have no practical usage. However, they are logical binary operators, nevertheless. .
We can summarise all the logical binary operators as follows:.
0 : contradiction.
1 : p AND q.
2 : p AND NOT(q).
3 : p.
4 : q AND NOT(p).
5 : q.
6 : p XOR q.
7 : p OR q.
8 : p NOR q (e.g., NOT(p OR q)).
9 : p XNOR q (e.g., NOT(p XOR q)).
A : NOT(q).
B : NOT(q AND NOT(p)).
C : NOT(p).
D : NOT(p AND NOT(q)).
E : p NAND q (e.g., NOT(p AND q)).
F : tautology.
You will note that A and C are already catered for with the unary NOT operator alone. You will also note that 3 and 5 are the inverse of A and C, and are both known as unary projection functions. Along with 0 and F, these 6 operators are completely redundant, leaving us with 10 useful logical binary operators, all of which can be created by combining NOT with the 3 most basic operators: AND, OR and XOR.. (MORE)

# What is the purpose of the arithmetic logic unit in a CPU?

Arithmetic, such as addition , subtraction , multiplication , or division . .
Logic, such as or , and , or exclusiveor . .
Comparison, such as greater than , less than , equal , or not equal .

# What is a Arithmetic logical unit?

The Arithmetic Logic Unit (ALU) is the heart of a CPU. This is what allows the computer to add, subtract, and to perform basic logical operations.

# What part of the CPU performs all arithmetic operations and all logic operations?

CPU expands to Central Processing Unit . CPU as a Unit refers to main components interconnected within a Box called Cabinet. Cabinet houses components such as Power Supply, Motherboard, Processor, RAMs, Harddisk Drive & other components as per requirements. Inside CPU on Motherboard with a …special designed socket the BRAIN of the Computer lies called Processor/MicroProcessor . The Processor is designed that is fabricated as a single unit comprises of Control Unit & Arithmetic/Logic Unit (ALU) . Control Unit executes all Instructions related part whereas ALU performs all Mathematical & Logical Operations. (MORE)

# What is logic operation and arithmetic operation?

A logic operation is when you work with the truth or falsehood of statements whereas an arithmetic operation is concerned only with numerical values.

# What does the arithmetic logic unit alu do?

In computing, an arithmetic logic unit (ALU) is a digital circuit that performs arithmetic and logical operations. The ALU is a fundamental building block of the central processing unit of a computer, and even the simplest microprocessors contain one for purposes such as maintaining timers. The proc…essors found inside modern CPUs and graphics processing units (GPUs) accommodate very powerful and very complex ALUs; a single component may contain a number of ALUs. (MORE)

# Which unit of computer performs arithmetic and logical functions?

The ALU (arithmetic logic unit) An ALU loads data from input registres, an external Control Unit then tells the ALU what operation to perform on that data, and then the ALU stores its result into an output register. Other mechanisms move data between these registers and memory.

# What activities are carried out by the arithmetic logic unit?

The arithmetic logic unit or ALU performs arithmetic, logic, andinteger operations. ALU was created by mathematician John vonNeumann in 1945.

# What is the difference between the arithmetic operations and logical operations which are performed by the CPU?

An arithmetic operation is dealing with data in a computational manner, adding subtracting, etc A logical operation would normally be regarded a a comparison and decision, though one school of though would include the literally 'logical operations' such as NOT, OR, AND, etc.

# What layer arrange signals into logical units of information called frame?

Layer 2 or the 'Data' layer of the OSI model encapsulates either 'bits' from the physical layer (1)- moving up the TCP stack or 'Packets' from the Network layer (3)- going down the the stack. 7 - Application Layer DATA 6 - Presentation Layer DATA 5 - Session Layer DATA 4 - Transport Layer SEGMENT 3… - Network Layer PACKET 2 - Data Layer (Incorporating LLC and MAC) FRAME 1 - Physical Layer BIT A good nmemonic for remembering the data encapsulation in the OSI model is 'Don't Some Peolple Fry Bacon' - Data, Segments, Packets, Bits. (MORE)

# Is The arithmetic logic unit is that component of the processor that directs and coordinates most of the operations in a computer?

No, the Instruction Decoder and Sequencer part of the Control unit directs and coordinates all of the operations of a computer; including the ALU , I/O , Load/Store , etc. units.

# How Arithmetic Logic Unit is helpful in CPU?

ALU is responsible for the processing of data inside a processor. It analyses and compares numbers, letters and special characters. It performs calculations and does comparisons. It also decoded data and manipulate them to produce information in machine code and then send that to the CU. It analyzes… and compares numbers, letters and special characters. (MORE)

# What are the six logical units of computer organization?

nput Output Memory Arithmetic Logic Unit (ALU) (Part of Central Processing Unit (CPU)) Control Unit (Part of Central Processing Unit (CPU)) Secondary Storage

# How do you design an Arithmetic Logic Unit?

As the name tells us the alu performs arithmetic and logic operations on two numbers in a CPU. I am answering assuming atleast some knowledge on the functionning of binary logic and computational science. A basic ALU has two input buses for the operators and one input bus for the selection of th…e operation. The selection is done via a MUX/DEMUX circuit. It's pretty straightforward... (MORE)

# How integer represented in arithmetic logic unit?

0 and 1 are the Sign Magnitudes 0 is used as +ve 1 is used as -ve e.g if we see +18 10 = 10010 2 but in the arithmetic representation well be 0 10010 2 -18 10 = 10010 2 but in the arithmetic representation well be 1 10010 2

# What are functions of the arithmetic logic unit?

The Arithmetic Logic Unit as suggested by the name carries out the arithmetic calculations of the computer.

# Can all computations and logic operations including Boolean logic be broken down and equated with elementary arithmetic?

They can all be broken down to three basic operations: AND, OR and NOT. It is also possible to break them down to a single operation, for example NAND (= NOT AND), but this is a bit confusing.

# What is logic unit in CPU?

Logic unit is the portion of CPU which is responsible for all the logical operations performed in the computer

# What can logic can do and can not do?

Logic can explain difficult-to-understand concepts to people who are ignorant to pieces of data to support a conclusion. Logic cannot, however, convince someone that something they are stubborn to accept to be true.

# What are the operations that are done by Arithmetic and Logic Unit?

The operation of ALU are: addition, multiplication,comparing,complement(subtraction),exclusive OR, increment, decrement, and bit-shifting. Notably, ALUs perform only INTEGER operations, not Floating Point operations.

# What central unit of the computer that cotains the logic circuitry and carries out the instructions of the computer?

That would be the CPU (central processing unit). If you mean carry out operations and is the "nest" for all the components then the motherboard would be.

# What is the function of the arithmetic logic unit in a computer?

ALU is the part of computer.It perform arithmetic operations such as addition,subtraction,multiplication,division and also it performs logical operations such as AND OR etc....

# What are the arithmetic and logical operator?

arithmetic operator are the operator which used to perform some basic operations like addition, subtraction ,multiplication (*),division(/).

# Which one is having higher priority arithmetic or logic operator?

In all popular high-level programming languages, the order in which operators are interpreted ("operator precedence") is vital to ensuring that all compilers execute instructions in precisely the same manner, as the "order of operations" rule is vital in mathematics. In the case of C and C++, ari…thmetic operators are executed prior to logic operators. For a detailed description of operator precedence, see the related links below. (MORE)

# What are the functions of the control unit and arithmetic and logic unit?

Arithmetic and logic units (ALU) performs basic arithmetic operations like addition ,subtraction ,division ,multiplication etc and basic logical operations like OR,AND,XOR,NOT,NAND,NOR etc . Control unit supervises all the functions of different parts of computers by generating control signals .

# What is the function of logical unit in a computer?

The Logical Unit is responsible for the calculations that are performed by the CPU It's the Brain of The CPU.

# What is the purpouse Arithmetic and Logic Unit?

That's a chip (or part of a chip) specialized in doing calculations such as additions, subtractions, multiplications, and divisions of floating-point numbers, that is, numbers with decimals (basically, numbers in scientific notation).

# Why sustraction operation is not used in arthimatic logic unit?

Subtraction in binary can be implemented by adding the 1'scomplement, and ignoring the overflow flag. Thus there is no needfor a separate subtraction function if addition and 1's complementare available.

# Does the the arithmetic logic unit performs comparisons such as not equal to?

Yes. In the x86 processors (Intel and compatible), there is simply a "compare" instruction, which will set several flags (one-bit values) in a register, one each for "greater than", "less than", "equal to", i.e., depending on the relative values of the two operands.

# What performs arithmetic and logic calculations?

There is a special part of the CPU that performs Arithmetic and Logical calculations. Its called Arithmetic Logic Unit ( ALU ).

# Which unit is used in computer for arithmetic calculation?

The bit . One bit contains a binary memory cell that will return a 1 or a zero. In abstract terms, the bit tells the system the answer to ONE UNAMBIGUOUS question with a yes or a no. In Boolean math it is called true or false. In hardware terms, when current flows through the cell, it will either …boost it (High=1=Yes) or lower it (Low=0=No) returning the answer to the question. For making accurate arithmetic calculation, you must always use integers (-infinity...-4, -3, -2, -1, 0, 1, 2, 3, 4....infinity) using floating point numbers or floats (3.14, 1.7, 0.99999999999....etc) is banned by the IEEE and ISO 9000 and other standards organizations for good reason, if your ERP system uses floats and calculates enough transaction using floats, you will either lose tons of $ or have some 'splainin to do to clients and the IRS. if the calculation involves money use integers .... so $1.50 must be read in as 150 cents and returned as another integer (let's say we calculated the tax and the answer is $1.61, the integer 161 must be returned and converted to $1.61 OUTSIDE of the program that did the financial calculation). Point = use ints whenever poss. and always use ints for $. (MORE)

# What part of a computer performs all of the arithmetic and logical operations?

The quick answer: The processor. The longer answer: Within the processor, a series of circuits andgates called the ALU (Arithmetic and Logic Unit) performsactual calculations, to be passed back into memory or on for onwardexecution cycles.

# The unit that performs the arithmetic and logical operations within the processor?

The unit that performs the arithmetic and logical operations withinthe processor is called the Arithmetic Logic Unit (ALU).

# How do the arithmetic shift and logical shift differ?

With a logical shift the vacated bits are always filled withzeroes. With an arithmetic shift, a left shift will fill vacatedbits with zeroes but a right shift fills the vacated bits with acopy of the most significant bit.