What is the main function of the arithmetic unit in a microcomputer?

#What is the main function of the arithmetic unit in a microcomputer?

The main function of the arithmetic unit in the microcomputer is arithmetic and logical operations.

Arithmetic unit: arithmetic unit, a component in a computer that performs various arithmetic and logical operations. The basic operations of the arithmetic unit include the four arithmetic operations of addition, subtraction, multiplication, and division, logical operations such as AND, OR, NOT, and XOR, as well as operations such as shifts, comparisons, and transmissions. It is also called the Arithmetic Logic Unit (ALU).

The processing object of the operator is data, so the data length and computer data representation method have a great impact on the performance of the operator. In the 1970s, microprocessors often used 1, 4, 8, and 16 binary bits as the basic unit for processing data. Most general-purpose computers use 16, 32, or 64 bits as the length of data processed by the arithmetic unit.

Extended information

The basic function of the arithmetic unit is to complete the processing of various data, such as the four arithmetic operations, logical operations such as AND, OR, and negation, arithmetic and logical shift operations , compare values, change symbols, calculate main memory addresses, etc. The registers in the arithmetic unit are used to temporarily save the data participating in the operation and the intermediate results of the operation. Corresponding components should also be set up in the operator to record the characteristics of an operation result, such as whether it overflows, the sign bit of the result, whether the result is zero, etc. There are many types of operators used in computers, and there are different classification methods from different perspectives. The decimal point representation can be divided into fixed-point arithmetic and floating-point arithmetic.

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