presentation progress

manual/PRESENTATION_ExSyn.tex

@@ -423,7 +423,70 @@ more advanced ABC features. It is also possible to write the design with
 \subsection{Other special-purpose mapping commands}
 
 \begin{frame}{\subsecname}
-TBD
+\begin{block}{\tt dfflibmap}
+This command maps the internal register cell types to the register types
+described in a liberty file.
+\end{block}
+
+\bigskip
+\begin{block}{\tt hilomap}
+Some architectures require special driver cells for driving a constant hi or lo
+value. This command replaces simple constants with instances of such driver cells.
+\end{block}
+
+\bigskip
+\begin{block}{\tt iopadmap}
+Top-level input/outputs must usually be implemented using special I/O-pad cells.
+This command inserts this cells to the design.
+\end{block}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\subsection{Example Synthesis Script}
+
+\begin{frame}[fragile]{\subsecname}
+\begin{columns}
+\column[t]{4cm}
+\begin{lstlisting}[basicstyle=\ttfamily\fontsize{6pt}{7pt}\selectfont]
+# read and elaborate design
+read_verilog cpu_top.v cpu_ctrl.v cpu_regs.v
+read_verilog -D WITH_MULT cpu_alu.v
+hierarchy -check -top cpu_top
+
+# high-level synthesis
+proc; opt; memory -nomap;; fsm; opt
+
+# substitute block rams
+techmap -map map_rams.v
+
+# map remaining memories
+memory_map
+
+# low-level synthesis
+techmap; opt; flatten;; abc -lut6
+techmap -map map_xl_cells.v
+
+# add clock buffers
+select -set xl_clocks t:FDRE %x:+FDRE[C] t:FDRE %d
+iopadmap -inpad BUFGP O:I @xl_clocks
+
+# add io buffers
+select -set xl_nonclocks w:* t:BUFGP %x:+BUFGP[I] %d
+iopadmap -outpad OBUF I:O -inpad IBUF O:I @xl_nonclocks
+
+# write synthesis results
+write_edif synth.edif
+\end{lstlisting}
+\column[t]{6cm}
+\begin{block}{Teaser / Outlook}
+\small\parbox{6cm}{
+This script contains some constructs that have not been explained
+so far, such as the weird {\tt select} expressions at the end of
+the script. They are only one of the topics covered in Section 3
+``Advanced Synthesis'' of this presentation.}
+\end{block}
+\end{columns}
 \end{frame}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

manual/PRESENTATION_Intro.tex

@@ -247,6 +247,23 @@ as Qflow\footnote[frame]{\url{http://opencircuitdesign.com/qflow/}} for ASIC des
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+\subsection{Example Problem}
+
+\begin{frame}[fragile]{\subsecname{} -- Verilog Source: \tt counter.v}
+\lstinputlisting[xleftmargin=1cm, language=Verilog]{PRESENTATION_Intro/counter.v}
+\end{frame}
+
+\begin{frame}[fragile]{\subsecname{} -- Cell Library: \tt mycells.lib}
+\begin{columns}
+\column[t]{5cm}
+\lstinputlisting[basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=liberty, lastline=20]{PRESENTATION_Intro/mycells.lib}
+\column[t]{5cm}
+\lstinputlisting[basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=liberty, firstline=21]{PRESENTATION_Intro/mycells.lib}
+\end{columns}
+\end{frame}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
 \subsection{Example Synthesis Script}
 
 \begin{frame}[t]{\subsecname}
@@ -256,8 +273,8 @@ as Qflow\footnote[frame]{\url{http://opencircuitdesign.com/qflow/}} for ASIC des
 \begin{minipage}[t]{6cm}
 \tt\scriptsize
 \# read design\\
-\boxalert<1>{read\_verilog mydesign.v}\\
+\boxalert<1>{read\_verilog counter.v}\\
-\boxalert<2>{hierarchy -check -top mytop}
+\boxalert<2>{hierarchy -check -top counter}
 
 \medskip
 \# the high-level stuff\\
@@ -291,8 +308,8 @@ as Qflow\footnote[frame]{\url{http://opencircuitdesign.com/qflow/}} for ASIC des
 \vskip1cm
 
 \begin{block}{Command: \tt
-\only<1>{read\_verilog mydesign.v}%
+\only<1>{read\_verilog counter.v}%
-\only<2>{hierarchy -check -top mytop}%
+\only<2>{hierarchy -check -top counter}%
 \only<3>{proc}%
 \only<4>{opt}%
 \only<5>{memory}%
@@ -306,46 +323,49 @@ as Qflow\footnote[frame]{\url{http://opencircuitdesign.com/qflow/}} for ASIC des
 \only<13>{clean}%
 \only<14>{write\_verilog synth.v}}
 \only<1>{
-	TBD
+	Read Verilog source file and convert to internal representation.
 }%
 \only<2>{
-	TBD
+	Elaborate the design hierarchy. Should alsways be the first
+	command after reading the design.
 }%
 \only<3>{
-	TBD
+	Convert ``processes'' (the internal representation of behavioral
+	Verilog code) into multiplexers and registers.
 }%
 \only<4>{
-	TBD
+	Perform some basic optimizations and cleanups.
 }%
 \only<5>{
-	TBD
+	Analyze memories and create circuits to implement them.
 }%
 \only<6>{
-	TBD
+	Perform some basic optimizations and cleanups.
 }%
 \only<7>{
-	TBD
+	Analyze and optimize finite state machines.
 }%
 \only<8>{
-	TBD
+	Perform some basic optimizations and cleanups.
 }%
 \only<9>{
-	TBD
+	Map coarse-grain RTL cells (adders, etc.) to fine-grain
+	logic gates (AND, OR, NOT, etc.).
 }%
 \only<10>{
-	TBD
+	Perform some basic optimizations and cleanups.
 }%
 \only<11>{
-	TBD
+	Map registers to available hardware flip-flops.
 }%
 \only<12>{
-	TBD
+	Map logix to available hardware gates.
 }%
 \only<13>{
-	TBD
+	Clean up the design (just the last step of {\tt opt}).
 }%
 \only<14>{
-	TBD
+	Write final synthesis result to output file.
 }%
 \end{block}
 
@@ -355,19 +375,6 @@ as Qflow\footnote[frame]{\url{http://opencircuitdesign.com/qflow/}} for ASIC des
 
 \subsection{Running the Synthesis Script}
 
-\begin{frame}[fragile]{\subsecname{} -- Verilog Source: \tt counter.v}
-\lstinputlisting[xleftmargin=1cm, language=Verilog]{PRESENTATION_Intro/counter.v}
-\end{frame}
-
-\begin{frame}[fragile]{\subsecname{} -- Cell Library: \tt mycells.lib}
-\begin{columns}
-\column[t]{5cm}
-\lstinputlisting[basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=liberty, lastline=20]{PRESENTATION_Intro/mycells.lib}
-\column[t]{5cm}
-\lstinputlisting[basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=liberty, firstline=21]{PRESENTATION_Intro/mycells.lib}
-\end{columns}
-\end{frame}
-
 \begin{frame}[t, fragile]{\subsecname{} -- Step 1/4}
 \begin{verbatim}
 read_verilog counter.v
@@ -409,7 +416,7 @@ clean
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-\subsection{More Yosys Commands}
+\subsection{Yosys Commands}
 
 \begin{frame}[fragile]{\subsecname{} 1/3}
 Command reference:

manual/PRESENTATION_Prog.tex

@@ -93,6 +93,6 @@ if (module->processes.size() != 0 || module->memories.size() != 0)
 \end{lstlisting}
 
 \bigskip
-So we only discuss this version of RTLIL in this presentation.
+For simplicity we only discuss this version of RTLIL in this presentation.
 \end{frame}