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Updated the encoding layout figures.

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This commit is contained in:
Garritt McCune
2024-07-19 15:54:34 -05:00
parent df15bb60e7
commit 8003d389e9
1 changed files with 18 additions and 18 deletions
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chapter 2.tex
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@@ -14,7 +14,7 @@
\end{minipage}
}
\def\minY{0} \def\maxY{0.5}
\def\minY{-1.5em} \def\maxY{1.5em}
\def\minX{-7} \def\maxX{7}
\usetikzlibrary{decorations.pathreplacing}
@@ -24,30 +24,30 @@ There are two basic encoding schemes that the object code will take. The most ba
%Placement info here: https://en.wikibooks.org/wiki/LaTeX/Floats,_Figures_and_Captions#Figures
\begin{figure}[h]
\begin{tikzpicture}
\draw (\minX, \minY) -- (\maxX, \minY);
\draw (\minX, \minY) -- (\minX, \maxY) node[above] {31}; %{$y$}; Note the $'s, those make something math stylized.
\draw (\maxX, \minY) -- (\maxX, \maxY) node[above] {0};
\draw (0, \minY) -- (0, \maxY) node[above] {15};
\draw [decorate, decoration={brace, amplitude=1em, mirror}] (\minX, -\maxY) -- (0, -\maxY) node[midway, below=1em] {Op Code (16-bits)};
\draw [decorate, decoration={brace, amplitude=1em, mirror}] (0, -\maxY) -- (\maxX, -\maxY) node[midway, below=1em] {Near Address (16-bits)};
\draw (\minX, 0) -- (\maxX, 0);
\draw (\minX, \minY / 2) -- (\minX, \maxY / 2); %{$y$}; Note the $'s, those make something math stylized.
\draw (\maxX, \minY / 2) -- (\maxX, \maxY / 2);
\draw (0, \minY / 2) -- (0, \maxY / 2); % Halfway mark
\draw (\minX, -\maxY) node[below=1em] {31} [decorate, decoration={brace, amplitude=1em, mirror}] -- (0, -\maxY) node[below=1em] {16} node[midway, below=1em] {Op Code (16-bits)};
\draw (0, \maxY) node[above=1em] {15} [decorate, decoration={brace, amplitude=1em}] -- (\maxX, \maxY) node[above=1em] {0} node[midway, above=1em] {Near Address (16-bits)};
\end{tikzpicture}
\caption{Short Valued Opcodes}
\label{fig:OpShortEncodingFigure} % https://www.overleaf.com/learn/latex/Referencing_Figures
\end{figure}
\begin{figure}
\begin{tikzpicture}
\draw (\minX, \minY) -- (\maxX, \minY);
\draw (\minX, \minY) -- (\minX, \maxY) node[above] {31}; %{$y$}; Note the $'s, those make something math stylized.
\draw (\maxX, \minY) -- (\maxX, \maxY) node[above] {0};
\draw (0, \minY) -- (0, \maxY) node[above] {15};
\draw [dotted] ({\maxX / 2}, \minY) -- ({\maxX / 2}, \maxY) node[above] {7};
\draw [decorate, decoration={brace, amplitude=1em, mirror}] (\minX, -\maxY) -- (0, -\maxY) node[midway, below=1em] {Op Code (16-bits)};
\draw [decorate, decoration={brace, amplitude=1em, mirror}] (0, -\maxY) -- ({\maxX / 2}, -\maxY) node[midway, below=1em] {Destination (8-bits)};
\draw [decorate, decoration={brace, amplitude=1em, mirror}] ({\maxX / 2}, -\maxY) -- (\maxX, -\maxY) node[midway, below=1em] {Source (8-bits)};
\draw (\minX, 0) -- (\maxX, 0);
\draw (\minX, \minY / 2) -- (\minX, \maxY / 2); %{$y$}; Note the $'s, those make something math stylized.
\draw (\maxX, \minY / 2) -- (\maxX, \maxY / 2);
\draw (0, \minY / 2) -- (0, \maxY / 2); % Halfway mark
\draw [dotted] (\maxX / 2, \minY / 2) -- (\maxX / 2, \maxY / 2); % Halfway mark for the lower 16 bits
\draw (\minX, -\maxY) node[below=1em] {31} [decorate, decoration={brace, amplitude=1em, mirror}] -- (0, -\maxY) node[below=1em] {16} node[midway, below=1em] {Op Code (16-bits)};
\draw (0, \maxY) node[above=1em] {15} [decorate, decoration={brace, amplitude=1em}] -- (\maxX / 2, \maxY) node[above=1em] {8} node[midway, above=1em] {Destination};
\draw (\maxX / 2, -\maxY) node[below=1em] {7} [decorate, decoration={brace, amplitude=1em, mirror}] -- (\maxX, -\maxY) node[below=1em] {0} node[midway, below=1em] {Source};
\end{tikzpicture}
\caption{Register Based Opcodes}
\label{fig:OpArgEncodingFigure} % https://www.overleaf.com/learn/latex/Referencing_Figures
\paragraph{Note} How the \textit{Destination} and \textit{Source} are interpreted is dependent on the opcode and operand mode bits as shown in Figure \ref{fig:OperandModeBitPattern}.
\paragraph{Note} How the \textit{Destination} and \textit{Source} are interpreted is dependent on the opcode and operand mode bits as shown in Figure \ref{fig:AddressingModeBitPattern}.
\end{figure}
\begin{figure}
\begin{tabularx}{\textwidth}{ | X | X | X | }
@@ -61,8 +61,8 @@ There are two basic encoding schemes that the object code will take. The most ba
100 & 32 Bit Immediate & Register \\
\hline
\end{tabularx}
\caption{Operand Mode Bit Pattern}
\label{fig:OperandModeBitPattern}
\caption{Addressing Mode}
\label{fig:AddressingModeBitPattern}
\paragraph{Note} The \textit{Immediate} values could represent an address (if 8-bit, relative otherwise 32-bit values will represent absolute addresses) or a numeric constant.
\end{figure}