What is the role of arithmetic logical unit inside the CPU
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An arithmetic logic unit (ALU) is a combinational digital electronic circuit that performs arithmetic and bitwise operationson integer binary numbers. This is in contrast to a floating-point unit (FPU), which operates on floating point numbers. An ALU is a fundamental building block of many types of computing circuits, including the central processing unit (CPU) of computers, FPUs, and graphics processing units (GPUs). A single CPU, FPU or GPU may contain multiple ALUs.
The inputs to an ALU are the data to be operated on, called operands, and a code indicating the operation to be performed; the ALU's output is the result of the performed operation. In many designs, the ALU also has status inputs or outputs, or both, which convey information about a previous operation or the current operation, respectively, between the ALU and external status registers.

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Explain the functions of the CU and ALU in the CPU of a computer.
Topics >>IT Topics >>CPU -06/04/12
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Explain the functions of the CU and ALU in the CPU of a computer.
The characteristics of the CU or control unit are as follows:
- This part of the of the CPU is the one that is in charge of all the operations being carried out.
- It is responsible to direct the system to execute instructions.
- It helps in communication between the memory and the arithmetic logical unit.
- It also aids in the loading of data and instructions residing in the secondary memory to the main memory as required.
The characteristics of the ALU are as follows:
- The ALU is responsible for performing all logical and arithmetic operations.
- Some of the arithmetic operations are as follows: addition, subtraction, multiplication and division.
- Some of the logical operations are as follows: comparison between numbers, letter and or special characters.
- The ALU is also responsible for the following conditions: Equal-to conditions, Less-than condition and greater than condition.
The inputs to an ALU are the data to be operated on, called operands, and a code indicating the operation to be performed; the ALU's output is the result of the performed operation. In many designs, the ALU also has status inputs or outputs, or both, which convey information about a previous operation or the current operation, respectively, between the ALU and external status registers.

PreparePractice
Explain the functions of the CU and ALU in the CPU of a computer.
Topics >>IT Topics >>CPU -06/04/12
« PreviousNext »
Explain the functions of the CU and ALU in the CPU of a computer.
The characteristics of the CU or control unit are as follows:
- This part of the of the CPU is the one that is in charge of all the operations being carried out.
- It is responsible to direct the system to execute instructions.
- It helps in communication between the memory and the arithmetic logical unit.
- It also aids in the loading of data and instructions residing in the secondary memory to the main memory as required.
The characteristics of the ALU are as follows:
- The ALU is responsible for performing all logical and arithmetic operations.
- Some of the arithmetic operations are as follows: addition, subtraction, multiplication and division.
- Some of the logical operations are as follows: comparison between numbers, letter and or special characters.
- The ALU is also responsible for the following conditions: Equal-to conditions, Less-than condition and greater than condition.
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ᴀʀɪᴛʜᴍᴇᴛɪᴄ ʟᴏɢɪᴄ ᴜɴɪᴛ ᴀᴄᴛs ᴀs ᴀɴ ᴀᴄᴄᴏᴜɴᴛᴀɴᴛ ᴏғ ᴀ ᴄᴏᴍᴘᴀɴʏ, ᴡʜɪᴄʜ ᴘᴇʀғᴏʀᴍs ᴀʟʟ ᴛʜᴇ ᴍᴀᴛʜᴇᴍᴀᴛɪᴄᴀʟ ᴀɴᴅ ʟᴏɢɪᴄᴀʟ ᴄᴀʟᴄᴜʟᴀᴛɪᴏɴs.
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