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<a id='n160' href='#n160'>160</a<style>pre { line-height: 125%; margin: 0; }
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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */</style><div class="highlight"><pre><span></span><span class="k">\documentclass</span><span class="nb">{</span>beamer<span class="nb">}</span>
<span class="k">\hypersetup</span><span class="nb">{</span>bookmarksdepth=5<span class="nb">}</span>

<span class="k">\usepackage</span><span class="na">[T1]</span><span class="nb">{</span>fontenc<span class="nb">}</span>   <span class="c">% required for luximono!</span>
<span class="k">\usepackage</span><span class="nb">{</span>lmodern<span class="nb">}</span>
<span class="k">\usepackage</span><span class="na">[scaled=0.8]</span><span class="nb">{</span>luximono<span class="nb">}</span>  <span class="c">% typewriter font with bold face</span>

<span class="c">% To install the luximono font files:</span>
<span class="c">% getnonfreefonts-sys --all        or</span>
<span class="c">% getnonfreefonts-sys luximono</span>
<span class="c">%</span>
<span class="c">% when there are trouble you might need to:</span>
<span class="c">% - Create /etc/texmf/updmap.d/99local-luximono.cfg</span>
<span class="c">%   containing the single line: Map ul9.map</span>
<span class="c">% - Run update-updmap followed by mktexlsr and updmap-sys</span>
<span class="c">%</span>
<span class="c">% This commands must be executed as root with a root environment</span>
<span class="c">% (i.e. run &quot;sudo su&quot; and then execute the commands in the root</span>
<span class="c">% shell, don&#39;t just prefix the commands with &quot;sudo&quot;).</span>

<span class="c">% formats the text according the set language</span>
<span class="k">\usepackage</span><span class="na">[english]</span><span class="nb">{</span>babel<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>amsmath<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>multirow<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>booktabs<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>listings<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>setspace<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>skull<span class="nb">}</span>
<span class="k">\usepackage</span><span class="nb">{</span>units<span class="nb">}</span>

<span class="k">\usepackage</span><span class="nb">{</span>tikz<span class="nb">}</span>
<span class="k">\usetikzlibrary</span><span class="nb">{</span>calc<span class="nb">}</span>
<span class="k">\usetikzlibrary</span><span class="nb">{</span>arrows<span class="nb">}</span>
<span class="k">\usetikzlibrary</span><span class="nb">{</span>scopes<span class="nb">}</span>
<span class="k">\usetikzlibrary</span><span class="nb">{</span>through<span class="nb">}</span>
<span class="k">\usetikzlibrary</span><span class="nb">{</span>shapes.geometric<span class="nb">}</span>

<span class="k">\lstset</span><span class="nb">{</span>basicstyle=<span class="k">\ttfamily</span><span class="nb">}</span>

<span class="k">\def\B</span>#1<span class="nb">{{</span><span class="k">\tt\textbackslash</span><span class="nb">{}</span>#1<span class="nb">}}</span>
<span class="k">\def\C</span>#1<span class="nb">{</span><span class="k">\lstinline</span><span class="na">[language=C++]</span><span class="nb">{</span>#1<span class="nb">}}</span>
<span class="k">\def\V</span>#1<span class="nb">{</span><span class="k">\lstinline</span><span class="na">[language=Verilog]</span><span class="nb">{</span>#1<span class="nb">}}</span>

<span class="k">\lstdefinelanguage</span><span class="nb">{</span>liberty<span class="nb">}{</span>
	morecomment=[s]<span class="nb">{</span>/*<span class="nb">}{</span>*/<span class="nb">}</span>,
	morekeywords=<span class="nb">{</span>library,cell,area,pin,direction,function,clocked<span class="nb">_</span>on,next<span class="nb">_</span>state,clock,ff<span class="nb">}</span>,
	morestring=[b]&quot;,
<span class="nb">}</span>

<span class="k">\lstdefinelanguage</span><span class="nb">{</span>rtlil<span class="nb">}{</span>
	morecomment=[l]<span class="nb">{</span><span class="k">\#</span><span class="nb">}</span>,
	morekeywords=<span class="nb">{</span>module,attribute,parameter,wire,memory,auto,width,offset,size,input,output,inout,cell,connect,switch,case,assign,sync,low,high,posedge,negedge,edge,always,update,process,end<span class="nb">}</span>,
	morestring=[b]&quot;,
<span class="nb">}</span>

<span class="k">\lstdefinelanguage</span><span class="nb">{</span>ys<span class="nb">}{</span>
	morecomment=[l]<span class="nb">{</span><span class="k">\#</span><span class="nb">}</span>,
<span class="nb">}</span>

<span class="k">\lstset</span><span class="nb">{</span>
	commentstyle=<span class="k">\color</span><span class="nb">{</span>YosysGreen<span class="nb">}</span>,
<span class="nb">}</span>

<span class="k">\newenvironment</span><span class="nb">{</span>boxalertenv<span class="nb">}{</span><span class="k">\begin</span><span class="nb">{</span>altenv<span class="nb">}</span><span class="c">%</span>
<span class="nb">{</span><span class="k">\usebeamertemplate</span><span class="nb">{</span>alerted text begin<span class="nb">}</span><span class="k">\usebeamercolor</span><span class="na">[fg]</span><span class="nb">{</span>alerted text<span class="nb">}</span><span class="k">\usebeamerfont</span><span class="nb">{</span>alerted text<span class="nb">}</span><span class="k">\setlength</span><span class="nb">{</span><span class="k">\fboxsep</span><span class="nb">}{</span>1pt<span class="nb">}</span><span class="k">\colorbox</span><span class="nb">{</span>bg<span class="nb">}}</span>
<span class="nb">{</span><span class="k">\usebeamertemplate</span><span class="nb">{</span>alerted text end<span class="nb">}}{</span><span class="k">\color</span><span class="nb">{</span>.<span class="nb">}}{}}{</span><span class="k">\end</span><span class="nb">{</span>altenv<span class="nb">}}</span>

<span class="k">\newcommand</span>&lt;&gt;<span class="nb">{</span><span class="k">\boxalert</span><span class="nb">}</span>[1]<span class="nb">{{</span><span class="c">%</span>
<span class="k">\begin</span><span class="nb">{</span>boxalertenv<span class="nb">}</span>#2<span class="nb">{</span>#1<span class="nb">}</span><span class="k">\end</span><span class="nb">{</span>boxalertenv<span class="nb">}</span><span class="c">%</span>
<span class="nb">}}</span>

<span class="k">\newcommand</span><span class="nb">{</span><span class="k">\subsectionpagesuffix</span><span class="nb">}{</span>
<span class="k">\vfill\begin</span><span class="nb">{</span>centering<span class="nb">}</span>
<span class="nb">{</span><span class="k">\usebeamerfont</span><span class="nb">{</span>subsection name<span class="nb">}</span><span class="k">\usebeamercolor</span><span class="na">[fg]</span><span class="nb">{</span>subsection name<span class="nb">}</span>of <span class="k">\sectionname</span>~<span class="k">\insertsectionnumber</span><span class="nb">}</span>
<span class="k">\vskip</span>1em<span class="k">\par</span>
<span class="k">\setbeamercolor</span><span class="nb">{</span>graybox<span class="nb">}{</span>bg=gray<span class="nb">}</span>
<span class="k">\begin</span><span class="nb">{</span>beamercolorbox<span class="nb">}</span>[sep=8pt,center]<span class="nb">{</span>graybox<span class="nb">}</span>
<span class="k">\usebeamerfont</span><span class="nb">{</span>subsection title<span class="nb">}</span><span class="k">\insertsection\par</span>
<span class="k">\end</span><span class="nb">{</span>beamercolorbox<span class="nb">}</span>
<span class="k">\end</span><span class="nb">{</span>centering<span class="nb">}}</span>

<span class="k">\title</span><span class="nb">{</span>Yosys Open SYnthesis Suite<span class="nb">}</span>
<span class="k">\author</span><span class="nb">{</span>Clifford Wolf<span class="nb">}</span>
<span class="k">\institute</span><span class="nb">{</span>http://www.clifford.at/yosys/<span class="nb">}</span>

<span class="k">\usetheme</span><span class="nb">{</span>Madrid<span class="nb">}</span>
<span class="k">\usecolortheme</span><span class="nb">{</span>seagull<span class="nb">}</span>
<span class="k">\beamertemplatenavigationsymbolsempty</span>

<span class="k">\definecolor</span><span class="nb">{</span>YosysGreen<span class="nb">}{</span>RGB<span class="nb">}{</span>85,136,102<span class="nb">}</span>
<span class="k">\definecolor</span><span class="nb">{</span>MyBlue<span class="nb">}{</span>RGB<span class="nb">}{</span>85,130,180<span class="nb">}</span>

<span class="k">\setbeamercolor</span><span class="nb">{</span>title<span class="nb">}{</span>fg=black,bg=YosysGreen!70<span class="nb">}</span>
<span class="k">\setbeamercolor</span><span class="nb">{</span>titlelike<span class="nb">}{</span>fg=black,bg=YosysGreen!70<span class="nb">}</span>
<span class="k">\setbeamercolor</span><span class="nb">{</span>frametitle<span class="nb">}{</span>fg=black,bg=YosysGreen!70<span class="nb">}</span>
<span class="k">\setbeamercolor</span><span class="nb">{</span>block title<span class="nb">}{</span>fg=black,bg=YosysGreen!70<span class="nb">}</span>
<span class="k">\setbeamercolor</span><span class="nb">{</span>item projected<span class="nb">}{</span>fg=black,bg=YosysGreen<span class="nb">}</span>

<span class="k">\begin</span><span class="nb">{</span>document<span class="nb">}</span>

<span class="k">\begin</span><span class="nb">{</span>frame<span class="nb">}</span>
<span class="k">\titlepage</span>
<span class="k">\end</span><span class="nb">{</span>frame<span class="nb">}</span>

<span class="k">\setcounter</span><span class="nb">{</span>section<span class="nb">}{</span>-3<span class="nb">}</span>

<span class="k">\section</span><span class="nb">{</span>Abstract<span class="nb">}</span>
<span class="k">\begin</span><span class="nb">{</span>frame<span class="nb">}{</span>Abstract<span class="nb">}</span>
Yosys is the first full-featured open source software for Verilog HDL
synthesis. It supports most of Verilog-2005 and is well tested with
real-world designs from the ASIC and FPGA world.

<span class="k">\bigskip</span>
Learn how to use Yosys to create your own custom synthesis flows and
discover why open source HDL synthesis is important for researchers,
hobbyists, educators and engineers alike.

<span class="k">\bigskip</span>
This presentation covers basic concepts of Yosys, writing synthesis scripts
for a wide range of applications, creating Yosys scripts for various
non-synthesis applications (such as formal equivalence checking) and
writing extensions to Yosys using the C++ API.
<span class="k">\end</span><span class="nb">{</span>frame<span class="nb">}</span>

<span class="k">\section</span><span class="nb">{</span>About me<span class="nb">}</span>
<span class="k">\begin</span><span class="nb">{</span>frame<span class="nb">}{</span>About me<span class="nb">}</span>
Hi! I&#39;m Clifford Wolf.

<span class="k">\bigskip</span>
I like writing open source software. For example:
<span class="k">\begin</span><span class="nb">{</span>itemize<span class="nb">}</span>
<span class="k">\item</span> Yosys
<span class="k">\item</span> OpenSCAD (now maintained by Marius Kintel)
<span class="k">\item</span> SPL (a not very popular scripting language)
<span class="k">\item</span> EmbedVM (a very simple compiler+vm for 8 bit micros)
<span class="k">\item</span> Lib(X)SVF (a library to play SVF/XSVF files over JTAG)
<span class="k">\item</span> ROCK Linux (discontinued since 2010)
<span class="k">\end</span><span class="nb">{</span>itemize<span class="nb">}</span>
<span class="k">\end</span><span class="nb">{</span>frame<span class="nb">}</span>

<span class="k">\section</span><span class="nb">{</span>Outline<span class="nb">}</span>
<span class="k">\begin</span><span class="nb">{</span>frame<span class="nb">}{</span>Outline<span class="nb">}</span>
Yosys is an Open Source Verilog synthesis tool, and more.

<span class="k">\bigskip</span>
Outline of this presentation:
<span class="k">\begin</span><span class="nb">{</span>itemize<span class="nb">}</span>
<span class="k">\item</span> Introduction to the field and Yosys
<span class="k">\item</span> Yosys by example: synthesis
<span class="k">\item</span> Yosys by example: advanced synthesis
<span class="k">\item</span> Yosys by example: beyond synthesis
<span class="k">\item</span> Writing Yosys extensions in C++
<span class="k">\end</span><span class="nb">{</span>itemize<span class="nb">}</span>
<span class="k">\end</span><span class="nb">{</span>frame<span class="nb">}</span>

<span class="k">\include</span><span class="nb">{</span>PRESENTATION<span class="nb">_</span>Intro<span class="nb">}</span>
<span class="k">\include</span><span class="nb">{</span>PRESENTATION<span class="nb">_</span>ExSyn<span class="nb">}</span>
<span class="k">\include</span><span class="nb">{</span>PRESENTATION<span class="nb">_</span>ExAdv<span class="nb">}</span>
<span class="k">\include</span><span class="nb">{</span>PRESENTATION<span class="nb">_</span>ExOth<span class="nb">}</span>
<span class="k">\include</span><span class="nb">{</span>PRESENTATION<span class="nb">_</span>Prog<span class="nb">}</span>

<span class="k">\end</span><span class="nb">{</span>document<span class="nb">}</span>
</pre></div>
</code></pre></td></tr></table>
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