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Clifford Wolf 2014-02-06 14:01:43 +01:00
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manual/PRESENTATION_ExAdv.tex
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@ -168,14 +168,66 @@ See {\tt help select} for full documentation of this expressions.
\subsubsection{Incremental selection}
\begin{frame}{\subsubsecname}
TBD
\begin{frame}[fragile]{\subsubsecname}
Sometime a selection can most easily described by a series of add/delete operations.
For the commands {\tt select -add} and {\tt select -del} add or remove objects
from the current selection instead of overwriting it.
\medskip
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
select -none # start with an empty selection
select -add reg_* # select a bunch of objects
select -del reg_42 # but not this one
select -add state %ci # and add mor stuff
\end{lstlisting}
\bigskip
Within a select expression the token {\tt \%} can be used to push the previous selection
on the stack.
\medskip
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
select t:$add t:$sub # select all $add and $sub cells
select % %ci % %d # select only the input wires to those cells
\end{lstlisting}
\end{frame}
\subsubsection{Creating selection variables}
\begin{frame}{\subsubsecname}
TBD
\begin{frame}[fragile]{\subsubsecname}
Selections can be stored under a name with the {\tt select -set <name>}
command. The stored selections can be used in later select expressions
using the syntax {\tt @<name>}.
\medskip
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
select -set cone_a state_a %ci*:-$dff # set @cone_a to the input cone of state_a
select -set cone_b state_b %ci*:-$dff # set @cone_b to the input cone of state_b
select @cone_a @cone_b %i # select the objects that are in both cones
\end{lstlisting}
\bigskip
Remember that select expressions can also be used directly as arguments to most
commands. Some commands also except a single select argument to some options.
In those cases selection variables must be used to capture more complex selections.
\medskip
\begin{lstlisting}[xleftmargin=0.5cm, basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys]
dump @cone_a @cone_b
select -set cone_ab @cone_a @cone_b %i
show -color red @cone_ab -color magenta @cone_a -color blue @cone_b
\end{lstlisting}
\end{frame}
\begin{frame}[fragile]{\subsubsecname{} -- Example}
\begin{columns}
\column[t]{4cm}
\lstinputlisting[basicstyle=\ttfamily\fontsize{6pt}{7pt}\selectfont, language=verilog]{PRESENTATION_ExAdv/select_01.v}
\column[t]{7cm}
\lstinputlisting[basicstyle=\ttfamily\fontsize{8pt}{10pt}\selectfont, language=ys, frame=single]{PRESENTATION_ExAdv/select_01.ys}
\end{columns}
\hfil\includegraphics[width=\linewidth,trim=0 0cm 0 0cm]{PRESENTATION_ExAdv/select_01.pdf}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -225,3 +277,26 @@ TBD
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\subsection{Summary}
\begin{frame}{\subsecname}
\begin{itemize}
\item TBD
\item TBD
\item TBD
\item TBD
\end{itemize}
\bigskip
\bigskip
\begin{center}
Questions?
\end{center}
\bigskip
\bigskip
\begin{center}
\url{http://www.clifford.at/yosys/}
\end{center}
\end{frame}