In computing, an arithmetic logic unit (ALU) is a combinational digital circuit that performs arithmetic and bitwise operations on integer binary numbers. [1][2] This is in contrast to a floating-point unit (FPU), which operates on floating point numbers.

2025年1月5日 · 算术逻辑单元（ALU，Arithmetic Logic Unit）是计算机中央处理器（CPU）中的一个关键组件，负责执行各种算术和逻辑运算。ALU的设计和功能对于计算机的性能和效率至关重要。以下是对ALU的详细解析，包括其功能、结构、工作原理以及在现代计算机中的应用。

本文深入探讨了ALU的设计原理，包括半加器、全加器的构建，以及如何通过扩展实现减法、比较等功能。 同时，文章详细介绍了整数加减法的运算规则，溢出处理，以及乘法、除法的硬件实现。 ALU就是运算器，这些内容都可以在书中的附录中找到，我们接下来看一个简单的例子. 可以看到，这里有两个输入，a、b，他们分别连接到了一个与门和一个或门，他们分别与和或的结果又连接到了一个多路选择器上，Select用于控制到底是做与运算还是做或运算，Select = 0时，做 …

An 8-bit arithmetic logic unit (ALU) is a combinational circuit which operates on two 8-bit input buses based on selection inputs. The ALU performs common arithmetic (addition and subtraction) and logic (AND, INV, XOR, and OR) functions. These operations are common to all computer systems and thus are an essential part of computer architecture.

In this Instructable, I will be going through the process of building and understanding the architecture behind an ALU (Arithmetic Logic Unit). The ALU is part of a computer's CPU (central processing unit) and it handles arithmetic and logic operations as the name suggests.

It demonstrates the design and implementation of an 8-bit Arithmetic Logic Unit (ALU) using fundamental logic gates and integrated circuits (ICs). The ALU is the core computational unit of all digital computing devices, performing basic arithmetic and logic operations.

We’ll there-fore start by constructing a 1-bit ALU. The logical operations are easiest, because they map directly onto the hardware components in Figure B.2.1. The 1-bit logical unit for AND and OR looks like Figure B.5.1. The multiplexor on the right then selects a AND b or a OR b, depending on whether the value of Operation is 0 or 1.

This chapter gives an overview of the Hierarchy of the 8-bit ALU and its design. First, we will introduce all the different types of logic gates that has been used in the design. Then, we will give an overview of the 4-bit ALU, 74S181 [1] and show

Arithmetic Logic Unit (ALU) Example ALU: given inputs a and b, and an operation code, produce output. Operation code: 000: AND 001: OR 010: NOR 011: ADD 111: SUB How do we implement this ALU?

2021年2月9日 · In this post we will create an Arithmetic & Logic Unit (ALU) using logic gates. The ALU is one of the main component of the CPU. It is used in the Execution stage of the FDE cycle to perform all the logical (e.g. AND, OR, NOT) operations and …