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# 电子工程代写|并行计算代写Parallel Computing代考|COSC530 VERY LONG INSTRUCTION WORD ( VLIW ) PROCESSORS

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## 电子工程代写|并行计算代写Parallel Computing代考|VERY LONG INSTRUCTION WORD ( VLIW ) PROCESSORS

This technique is considered fine-grain parallelism since the algorithm is now parallelized at the instruction level, which is the finest level of detail one could hope to divide an algorithm into. A VLIW implies that several instructions or opcodes are sent to the CPU to be executed simultaneously. Picking the instructions to be issued in one VLIW word is done by the compiler. The compiler must ensure that there is no dependency between the instructions in a VLIW word and that the hardware can support executing all the issued instructions [20]. This presents a potential advantage over instruction pipelining since instruction scheduling is done before the code is actually run.

Figure $2.16$ illustrates a processor that uses VLIW to control the operation of two datapath units. Figure 2.16a shows the schematic of the processor where the VLIW contains two instructions. Each instruction is used to control a datapath unit. Figure 2.16b shows the content of the VLIW word at different processing cycles. The figure is based on the ones presented in References 18 and 24. Each row represents a VLIW word issue. The vertical axis represents the machine cycles. A gray box indicates an instruction within the VLIW word and an empty box indicates a no-op. A no-op instruction is used when the compiler is unable to resolve the dependency among the instructions or datapath availability.

## 电子工程代写|并行计算代写Parallel Computing代考|INSTRUCTION – LEVEL PARALLELISM ( ILP ) AND SUPERSCALAR PROCESSORS

A superscalar processor is able to simultaneously execute several instructions from independent instruction pipelines [18]. Superscalar processors have a dynamic scheduler that examines the instructions in the instruction cache/memory and decides which ones to be issued to each instruction pipeline. Dynamic scheduling allows out-of-order instruction issue and execution. Figure $2.17$ shows a general organization of a three-way superscalar processor where the processor contains three instruction pipelines operating on three independent datapath units. A superscalar computer has several instruction pipelines and datapath units that can work in parallel to execute instructions issued to them from the CPU. Using this technique, the instruction execution rate will be greater than the clock rate. For a three-way superscalar architecture with an instruction pipeline, up to three instructions could be executed per clock cycle.

The instruction pipeline for a two-way superscalar processor shown in Fig. 2.18, which is a modification of Fig. 2.14, indicates the fact that we now have two instruction pipelines.

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## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。