31 lines
1.7 KiB
TeX
31 lines
1.7 KiB
TeX
\chapter{Instruction Set Architecture}
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\section{Encoding Schemes}
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\def\minY{0} \def\maxY{0.5}
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\def\minX{-7} \def\maxX{7}
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\usetikzlibrary{decorations.pathreplacing}
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\begin{figure}[!htb]
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\begin{tikzpicture}
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\draw (\minX, \minY) -- (\maxX, \minY);
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\draw (\minX, \minY) -- (\minX, \maxY) node[above] {31}; %{$y$}; Note the $'s, those make something math stylized.
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\draw (\maxX, \minY) -- (\maxX, \maxY) node[above] {0};
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\draw (0, \minY) -- (0, \maxY) node[above] {15};
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\draw [dotted] ({\maxX / 2}, \minY) -- ({\maxX / 2}, \maxY) node[above] {7};
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\draw [decorate, decoration={brace, amplitude=1em, mirror}] (\minX, -\maxY) -- (0, -\maxY) node[midway, below=1em] {Op Code (16-bits)};
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\draw [decorate, decoration={brace, amplitude=1em, mirror}] (0, -\maxY) -- ({\maxX / 2}, -\maxY) node[midway, below=1em] {Destination (8-bits)};
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\draw [decorate, decoration={brace, amplitude=1em, mirror}] ({\maxX / 2}, -\maxY) -- (\maxX, -\maxY) node[midway, below=1em] {Source (8-bits)};
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\end{tikzpicture}
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\caption{Register Based Opcodes}
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\end{figure}
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\begin{figure}[!htb]
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\begin{tikzpicture}
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\draw (\minX, \minY) -- (\maxX, \minY);
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\draw (\minX, \minY) -- (\minX, \maxY) node[above] {31}; %{$y$}; Note the $'s, those make something math stylized.
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\draw (\maxX, \minY) -- (\maxX, \maxY) node[above] {0};
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\draw (0, \minY) -- (0, \maxY) node[above] {15};
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\draw [decorate, decoration={brace, amplitude=1em, mirror}] (\minX, -\maxY) -- (0, -\maxY) node[midway, below=1em] {Op Code (16-bits)};
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\draw [decorate, decoration={brace, amplitude=1em, mirror}] (0, -\maxY) -- (\maxX, -\maxY) node[midway, below=1em] {Near Address (16-bits)};
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\end{tikzpicture}
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\caption{Short Valued Opcodes}
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\end{figure} |