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docs/DSP: Change conditional names to match Dolphin
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@Pokechu22
Pokechu22 committed Aug 22, 2021
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37 changes: 19 additions & 18 deletions docs/DSP/GameCube_DSP_Users_Manual/GameCube_DSP_Users_Manual.tex
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Expand Up @@ -1037,29 +1037,30 @@ \section{Conditional opcodes}
\begin{tabular}{|l|l|l|l|}
\hline
\textbf{Bits} & \textbf{\texttt{cc}} & \textbf{Name} & \textbf{Evaluated expression} \\ \hline
\texttt{0b0000} & \texttt{GE} & Greater than or equal & \\ \hline
\texttt{0b0001} & \texttt{L} & Less than & \\ \hline
\texttt{0b0010} & \texttt{G} & Greater than & \\ \hline
\texttt{0b0011} & \texttt{LE} & Less than or equal & \\ \hline
\texttt{0b0100} & \texttt{NE} & Not equal & \texttt{(\$sr \& 0x4) == 0} \\ \hline
\texttt{0b0101} & \texttt{EQ} & Equal & \texttt{(\$sr \& 0x4) != 0} \\ \hline
\texttt{0b0110} & \texttt{NC} & Not carry & \texttt{(\$sr \& 0x1) == 0} \\ \hline
\texttt{0b0111} & \texttt{C} & Carry & \texttt{(\$sr \& 0x1) != 0} \\ \hline
\texttt{0b1000} & & Below s32 & \texttt{(\$sr \& 0x10) == 0} \\ \hline
\texttt{0b1001} & & Above s32 & \texttt{(\$sr \& 0x10) != 0} \\ \hline
\texttt{0b1010} & & & \\ \hline
\texttt{0b1011} & & & \\ \hline
\texttt{0b1100} & \texttt{NZ} & Not zero & \texttt{(\$sr \& 0x40) == 0} \\ \hline
\texttt{0b1101} & \texttt{ZR} & Zero & \texttt{(\$sr \& 0x40) != 0} \\ \hline
\texttt{0b1110} & \texttt{O} & Overflow & \texttt{(\$sr \& 0x2) != 0} \\ \hline
\texttt{0b1111} & & \textless always\textgreater & \\ \hline
\texttt{0b0000} & \texttt{GE} & Greater than or equal & \Code{\$sr.O == \$sr.S} \\ \hline
\texttt{0b0001} & \texttt{L} & Less than & \Code{\$sr.O != \$sr.S} \\ \hline
\texttt{0b0010} & \texttt{G} & Greater than & \Code{(\$sr.O == \$sr.S) \&\& (\$sr.Z == 0)} \\ \hline
\texttt{0b0011} & \texttt{LE} & Less than or equal & \Code{(\$sr.O != \$sr.S) || (\$sr.Z != 0)} \\ \hline
\texttt{0b0100} & \texttt{NZ} & Not zero & \Code{\$sr.Z == 0} \\ \hline
\texttt{0b0101} & \texttt{Z} & Zero & \Code{\$sr.Z != 0} \\ \hline
\texttt{0b0110} & \texttt{NC} & Not carry & \Code{\$sr.C == 0} \\ \hline
\texttt{0b0111} & \texttt{C} & Carry & \Code{\$sr.C != 0} \\ \hline
\texttt{0b1000} & \texttt{x8} & Below s32 & \Code{\$sr.AS == 0} \\ \hline
\texttt{0b1001} & \texttt{x9} & Above s32 & \Code{\$sr.AS != 0} \\ \hline
\texttt{0b1010} & \texttt{xA} & & \Code{((\$sr.AS != 0) || (\$sr.TB != 0)) \&\& (\$sr.Z == 0)} \\ \hline
\texttt{0b1011} & \texttt{xB} & & \Code{((\$sr.AS == 0) \&\& (\$sr.TB == 0)) || (\$sr.Z != 0)} \\ \hline
\texttt{0b1100} & \texttt{LNZ} & Not logic zero & \Code{\$sr.LZ == 0} \\ \hline
\texttt{0b1101} & \texttt{LZ} & Logic zero & \Code{\$sr.LZ != 0} \\ \hline
\texttt{0b1110} & \texttt{O} & Overflow & \Code{\$sr.O != 0} \\ \hline
\texttt{0b1111} & & \textless always\textgreater & \\ \hline
\end{tabular}
\end{table}

\textbf{Note:}

There are two pairs of conditions that work similarly: \texttt{EQ}/\texttt{NE} and \texttt{ZR}/\texttt{NZ}.
\texttt{EQ}/\texttt{NE} pair operates on arithmetic zero flag (arithmetic 0) while \texttt{ZR}/\texttt{NZ} pair operates on logic zero flag (logic 0).
There are two pairs of conditions that work similarly: \texttt{Z}/\texttt{NZ} and \texttt{LZ}/\texttt{LNZ}.
\texttt{Z}/\texttt{NZ} pair operates on arithmetic zero flag (arithmetic 0) while \texttt{LZ}/\texttt{LNZ} pair operates on logic zero flag (logic 0).
The logic zero flag is only set by \Opcode{ANDCF} and \Opcode{ANDF}.

\pagebreak{}

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