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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<title>
Bob Playground
</title>
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<meta name="author" content="Bob">
<meta name="description" content="No pain no gain.">
<meta name="description" content="No pain no gain.">
<meta property="og:type" content="website">
<meta property="og:title" content="Bob Playground">
<meta property="og:url" content="https://bobcn.github.io/index.html">
<meta property="og:site_name" content="Bob Playground">
<meta property="og:description" content="No pain no gain.">
<meta property="og:locale" content="zh-Hans">
<meta name="twitter:card" content="summary">
<meta name="twitter:title" content="Bob Playground">
<meta name="twitter:description" content="No pain no gain.">
<link rel="icon" type="image/x-icon" href="/favicon.png">
<link rel="stylesheet" href="/css/uno.css">
<link rel="stylesheet" href="/css/archive.css">
<link rel="stylesheet" href="/css/china-social-icon.css">
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<link rel="stylesheet" href="/css/prism.css">
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<body>
<span class="mobile btn-mobile-menu">
<i class="icon icon-list btn-mobile-menu__icon"></i>
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<header class="panel-cover">
<div class="panel-main">
<div class="panel-main__inner panel-inverted">
<div class="panel-main__content">
<h1 class="panel-cover__title panel-title"><a href="/" title="link to homepage">Bob Playground</a></h1>
<hr class="panel-cover__divider" />
<p class="panel-cover__description">
Welcome to Bob‘s blog.
</p>
<hr class="panel-cover__divider panel-cover__divider--secondary" />
<div class="navigation-wrapper">
<nav class="cover-navigation cover-navigation--primary">
<ul class="navigation">
<li class="navigation__item"><a href="/#blog" title="" class="blog-button">BLOG</a></li>
<li class="navigation__item"><a href="/archive" title="" class="">LIST</a></li>
<li class="navigation__item"><a href="/about" title="" class="">ME</a></li>
</ul>
</nav>
<!-- ----------------------------
To add a new social icon simply duplicate one of the list items from below
and change the class in the <i> tag to match the desired social network
and then add your link to the <a>. Here is a full list of social network
classes that you can use:
icon-social-500px
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<nav class="cover-navigation navigation--social">
<ul class="navigation">
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<i class='icon icon-social-github'></i>
<span class="label">GitHub</span>
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<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/04/01/ds_ algorithm_ performance/" title="link to 算法的性能分析——空间复杂度与时间复杂度">算法的性能分析——空间复杂度与时间复杂度</a>
</h2>
<div class="excerpt">
<p>
算法（algorithm）是一组完成特定任务的有穷指令序列。可以使用空间复杂性和时间复杂性来评估算法性能。
</p>
</div>
<div class="post-list__meta">
<time datetime="2018-04-01" class="post-list__meta--date date">2018-04-01</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《数据结构》/">《数据结构》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/04/01/ds_ algorithm_ performance/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/30/make_y86_cpu_6/" title="link to 实现 Y86 处理器 —— 流水线冒险与异常处理">实现 Y86 处理器 —— 流水线冒险与异常处理</a>
</h2>
<div class="excerpt">
<p>在上一章中，已经介绍了指令相关的两种形式：数据相关和控制相关。</p>
<p>这些相关可能会导致流水线产生计算错误，称为 <em>冒险（hazard）</em>。</p>
<p>与两种指令相关对应，冒险也分为 <em>数据冒险（data hazard）</em> 和 <em>控制冒险（control hazard）</em>。</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-30" class="post-list__meta--date date">2018-03-30</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/30/make_y86_cpu_6/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/30/make_y86_cpu_5/" title="link to 实现 Y86 处理器 —— 流水线实现">实现 Y86 处理器 —— 流水线实现</a>
</h2>
<div class="excerpt">
<p>在 SEQ 的结构中，一条指令必须等到它之前的指令执行完毕，才能被执行。</p>
<p>通过流水线技术，可以增加系统的 <em>吞吐量（throughput）</em>，也就是单位时间内执行的指令数量。</p>
<p>执行一条指令所花费的时间称为 <em>延迟（latency）</em>。</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-30" class="post-list__meta--date date">2018-03-30</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/30/make_y86_cpu_5/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/27/make_y86_cpu_4/" title="link to 实现 Y86 处理器 —— 指令执行分析及顺序实现">实现 Y86 处理器 —— 指令执行分析及顺序实现</a>
</h2>
<div class="excerpt">
<p>我们初步要实现的处理器是顺序的，即完全执行完一条指令才执行下一条指令。</p>
<p>通常，会将不同的指令分解成相同的阶段序列，这样有利于简化处理器设计及充分利用硬件。</p>
<p>下面是各阶段的简略描述：</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-27" class="post-list__meta--date date">2018-03-27</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/27/make_y86_cpu_4/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/27/make_y86_cpu_3/" title="link to 实现 Y86 处理器 —— 指令集体系结构">实现 Y86 处理器 —— 指令集体系结构</a>
</h2>
<div class="excerpt">
<p>指令被编码为由一个或多个字节序列组成的二进制格式。</p>
<p>一个处理器支持的指令和指令的字节级编码称为它的 <em>指令集体系结构（Instruction-Set Architecture, ISA）。</em></p>
<p>定义一个指令集体系结构，包括：</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-27" class="post-list__meta--date date">2018-03-27</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/27/make_y86_cpu_3/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/26/make_y86_cpu_2/" title="link to 实现 Y86 处理器 —— 组合电路">实现 Y86 处理器 —— 组合电路</a>
</h2>
<div class="excerpt">
<p>在硬件设计中，用电子电路来实现对位的运算，以及在各种存储器中存储位。</p>
<p>大多数的现代电路技术都是用信号线上的高低压来表示不同的位值。</p>
<p>在当前的技术中，逻辑 1 使用 1.0 V 左右的高电压表示，而逻辑 0 则是用 0.0 V 左右的低电压表示。</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-26" class="post-list__meta--date date">2018-03-26</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/26/make_y86_cpu_2/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/25/make_y86_cpu_1/" title="link to 实现 Y86 处理器 —— 需要的部件">实现 Y86 处理器 —— 需要的部件</a>
</h2>
<div class="excerpt">
<p>从本篇起，我们将自己实现一个 Y86 处理器。</p>
<p>首先看一下为了实现 Y86 处理器，我们都需要哪些部件。</p>
<p>我们已经知道，CPU 会逐条地执行机器指令。那么 CPU 是如何判断正在执行的指令是否执行完毕，继而可以开始执行下一条指令的呢？</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-25" class="post-list__meta--date date">2018-03-25</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/《深入理解计算机系统》/">《深入理解计算机系统》</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/25/make_y86_cpu_1/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/24/hexo_reset_image_size/" title="link to Hexo 中扩展 Markdown 语法设置图片的大小">Hexo 中扩展 Markdown 语法设置图片的大小</a>
</h2>
<div class="excerpt">
<p>在使用 Hexo 的过程中发现 Markdown 的原生语法貌似没办法设置图片的大小。</p>
<p>在网上搜索了一下，貌似比较好的做法是：</p>
<pre><code class="language-html"><img src="/image/test.jpg" width="50%" height="50%">
</code></pre>
<p>不过我还是想用 Markdown 的原生语法,于是用我抠脚的 JS 写了一个。</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-24" class="post-list__meta--date date">2018-03-24</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/小工具/">小工具</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/24/hexo_reset_image_size/">Details-></a>
<!-- End: appended by Bob -->
</div>
<hr class="post-list__divider" />
</li>
<li>
<h2 class="post-list__post-title post-title">
<a href="/2018/03/23/build-blog-by-hexo/" title="link to 使用 Hexo - Huno 搭建个人博客">使用 Hexo - Huno 搭建个人博客</a>
</h2>
<div class="excerpt">
<p><a href="https://hexo.io" target="_blank" rel="noopener">Hexo 官网</a> 提供了详细的文档。</p>
<p>本文就一部分最主要的工作进行了记录。</p>
</div>
<div class="post-list__meta">
<time datetime="2018-03-23" class="post-list__meta--date date">2018-03-23</time>
<!-- Start: appended by Bob -->
<span class="post-list__meta--tags tags">
<font class="categories">
• [
<a class="categories-link" href="/categories/配置环境/">配置环境</a>
]
</font>
</span>
<a class="btn-border-small" href="/2018/03/23/build-blog-by-hexo/">Details-></a>
<!-- End: appended by Bob -->
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<span class="footer__copyright">© 2014-2015. | 由<a href="https://hexo.io/">Hexo</a>强力驱动 | 主题<a href="https://github.com/someus/huno">Huno</a></span>
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