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docs/DSP: Explain 16-bit and 40-bit modes

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Pokechu22 2022-05-22 18:16:31 -07:00
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docs/DSP/GameCube_DSP_Users_Manual/GameCube_DSP_Users_Manual.tex
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@ -505,7 +505,7 @@ The high parts of the 40-bit accumulators (\Register{acX.h}) are sign-extended 8
and the upper 8 bits read the same as the 7th bit. For instance, \Value{0x007F} reads back as \Value{0x007F}, but \Value{0x0080} reads and the upper 8 bits read the same as the 7th bit. For instance, \Value{0x007F} reads back as \Value{0x007F}, but \Value{0x0080} reads
back as \Value{0xFF80}. back as \Value{0xFF80}.
\textbf{Accumulators \Register{\$acX}:} \subsection{Accumulators \Register{\$acX}}
40-bit accumulator \Register{\$acX} (\Register{\$acX.hml}) consists of registers: 40-bit accumulator \Register{\$acX} (\Register{\$acX.hml}) consists of registers:
@ -513,7 +513,7 @@ back as \Value{0xFF80}.
$acX = $acX.h << 32 | $acX.m << 16 | $acX.l $acX = $acX.h << 32 | $acX.m << 16 | $acX.l
\end{lstlisting} \end{lstlisting}
\textbf{Short accumulators \Register{\$acs.X}:} \subsection{Short accumulators \Register{\$acsX}}
24-bit accumulator \Register{\$acsX} (\Register{\$acX.hm}) consists of the upper 24 bits of accumulator \Register{\$acX}. 24-bit accumulator \Register{\$acsX} (\Register{\$acX.hm}) consists of the upper 24 bits of accumulator \Register{\$acX}.
@ -521,12 +521,30 @@ $acX = $acX.h << 32 | $acX.m << 16 | $acX.l
$acsX = $acX.h << 16 | $acX.m $acsX = $acX.h << 16 | $acX.m
\end{lstlisting} \end{lstlisting}
\textbf{Additional accumulators \Register{\$axX}:} \subsection{Additional accumulators \Register{\$axX}}
32-bit accumulators \Register{\$axX} (\Register{\$axX.hl}) consist of registers:
\begin{lstlisting}[language=C++] \begin{lstlisting}[language=C++]
$axX = $axX.h << 16 | $axX.l $axX = $axX.h << 16 | $axX.l
\end{lstlisting} \end{lstlisting}
\subsection{16-bit and 40-bit modes}\label{subsec:SET40}
Depending on the value of \RegisterField{\$sr.SXM} (bit 14), loading to \Register{\$acX.m} may also update \Register{\$acX.h} and \Register{\$acX.l}, and stores from \Register{\$acX.m} may experience saturation based on \Register{\$acX.h}. Regardless of the value of \RegisterField{\$sr.SXM}, arithmetic operations such as \Opcode{ADDI}, \Opcode{INCM}, \Opcode{MOVR}, and \Opcode{LSRN} will still affect the entire accumulator.
If \RegisterField{\$sr.SXM} is set to 0, then 16-bit mode (\Opcode{SET16}) is in use. Loads to \Register{\$acX.m} will only change \Register{\$acX.m}, and storing \Register{\$acX.m} will use the value directly contained in \Register{\$acX.m}; the same applies to loads to and stores from \Register{\$acX.h} or \Register{\$acX.l} or any other register.
If \RegisterField{\$sr.SXM} is set to 1, then 40-bit mode (\Opcode{SET40}) is in use. Loads to \Register{\$acX.m} will set \Register{\$acX.l} to 0 and will sign-extend into \Register{\$acX.h} (setting it to \Value{0xFF} if the sign bit is set (\InlineExpression{\$acX.m \& 0x8000 != 0}), and to 0 otherwise). This means that in 40-bit mode, loads to \Register{\$acX.m} are effectively loads to the whole accumulator \Register{\$acX}. Loads to \Register{\$acX.h} and \Register{\$acX.l} do not have this special behavior; they only modify the specified register (as in 16-bit mode).
Additionally, if \RegisterField{\$sr.SXM} is set to 1, then moving or storing from \Register{\$acX.m} may instead result in \Value{0x7fff} or \Value{0x8000} being used. This happens if \Register{\$acX.hml} is not the same as sign-extending \Register{\$acX.ml}; \Value{0x7fff} is used if \Register{\$acX} is positive and \Value{0x8000} is used if \Register{\$acX} is negative.
The conditions for this saturation are the same as the conditions for \RegisterField{\$sr.AS} (bit 4, above s32) to be set when flags are updated. (This does not mean that the saturation happens if and only if \RegisterField{\$sr.AS} is set, as the flags might have been set after an operation on a different register.)
The following instructions perform sign-extension when writing to \Register{\$acX.m}: \Opcode{ILRR}, \Opcode{ILRRD}, \Opcode{ILRRI}, and \Opcode{ILRRN}; \Opcode{LR}; \Opcode{LRI}; \Opcode{LRIS}; \Opcode{LRR}, \Opcode{LRRD}, \Opcode{LRRI}, and \Opcode{LRRN}; \Opcode{LRS}; \Opcode{MRR}; and \Opcode{'L} and \Opcode{'LN}.
The following instructions experience saturation when reading from \Register{\$acX.m}: \Opcode{BLOOP}; \Opcode{LOOP}; \Opcode{MRR}; \Opcode{SR}; \Opcode{SRR}, \Opcode{SRRD}, \Opcode{SRRI}, and \Opcode{SRRN}; \Opcode{SRS}; \Opcode{'LS}, \Opcode{'LSM}, \Opcode{'LSM}, and \Opcode{'LSNM}; \Opcode{'MV}; \Opcode{'SL}, \Opcode{'SLM}, \Opcode{'SLN}, and \Opcode{'SLNM}; and \Opcode{'S} and \Opcode{'SN}.
\pagebreak{} \pagebreak{}
\section{Stacks} \section{Stacks}
@ -569,8 +587,8 @@ Furthermore, it also contains control bits to configure the flow of certain oper
\begin{tabular}{|l|l|l|} \begin{tabular}{|l|l|l|}
\hline \hline
\textbf{Bit} & \textbf{Name} & \textbf{Comment} \\ \hline \textbf{Bit} & \textbf{Name} & \textbf{Comment} \\ \hline
\texttt{15} & \texttt{SU} & Operands are signed (1 = unsigned) \\ \hline \texttt{15} & \texttt{SU} & Multiplication operands are signed (1 = unsigned) \\ \hline
\texttt{14} & \texttt{SXM} & Sign extension mode (0 = \texttt{set16}, 1 = \texttt{set40}) \\ \hline \texttt{14} & \texttt{SXM} & Sign extension mode (1 = 40-bit, see \nameref{subsec:SET40}) \\ \hline
\texttt{13} & \texttt{AM} & Product multiply result by 2 (when \texttt{AM = 0}) \\ \hline \texttt{13} & \texttt{AM} & Product multiply result by 2 (when \texttt{AM = 0}) \\ \hline
\texttt{12} & & \\ \hline \texttt{12} & & \\ \hline
\texttt{11} & \texttt{EIE} & External interrupt enable \\ \hline \texttt{11} & \texttt{EIE} & External interrupt enable \\ \hline
@ -1634,6 +1652,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\Register{\$R} reaches zero. Block ends at specified address \Address{addrA} inclusive. i.e. opcode at \Address{addrA} is the last \Register{\$R} reaches zero. Block ends at specified address \Address{addrA} inclusive. i.e. opcode at \Address{addrA} is the last
opcode included in loop. Counter is pushed on loop stack \Register{\$st3}, end of block address is pushed on loop stack opcode included in loop. Counter is pushed on loop stack \Register{\$st3}, end of block address is pushed on loop stack
\Register{\$st2} and the repeat address is pushed on call stack \Register{\$st0}. Up to 4 nested loops are allowed. \Register{\$st2} and the repeat address is pushed on call stack \Register{\$st0}. Up to 4 nested loops are allowed.
\item When using \Register{\$ac0.m} or \Register{\$ac1.m} as the initial counter value, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2138,6 +2157,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from instruction memory pointed by addressing register \Register{\$arS} \item Move value from instruction memory pointed by addressing register \Register{\$arS}
to mid accumulator register \Register{\$acD.m}. to mid accumulator register \Register{\$acD.m}.
\item Optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2160,6 +2180,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from instruction memory pointed by addressing register \Register{\$arS} \item Move value from instruction memory pointed by addressing register \Register{\$arS}
to mid accumulator register \Register{\$acD.m}. Decrement addressing register \Register{\$arS}. to mid accumulator register \Register{\$acD.m}. Decrement addressing register \Register{\$arS}.
\item Optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2183,6 +2204,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from instruction memory pointed by addressing register \Register{\$arS} to \item Move value from instruction memory pointed by addressing register \Register{\$arS} to
mid accumulator register \Register{\$acD.m}. Increment addressing register \Register{\$arS}. mid accumulator register \Register{\$acD.m}. Increment addressing register \Register{\$arS}.
\item Optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2207,6 +2229,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\item Move value from instruction memory pointed by addressing register \Register{\$arS} \item Move value from instruction memory pointed by addressing register \Register{\$arS}
to mid accumulator register \Register{\$acD.m}. Add corresponding indexing register to mid accumulator register \Register{\$acD.m}. Add corresponding indexing register
\Register{\$ixS} to addressing register \Register{\$arS}. \Register{\$ixS} to addressing register \Register{\$arS}.
\item Optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2367,6 +2390,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\item Repeatedly execute the following opcode until the counter specified by the value from register \Register{\$R} reaches zero. \item Repeatedly execute the following opcode until the counter specified by the value from register \Register{\$R} reaches zero.
Each execution decrements the counter. Register \Register{\$R} remains unchanged. If register \Register{\$R} is set to zero at the Each execution decrements the counter. Register \Register{\$R} remains unchanged. If register \Register{\$R} is set to zero at the
beginning of loop then the looped instruction will not get executed. beginning of loop then the looped instruction will not get executed.
\item When using \Register{\$ac0.m} or \Register{\$ac1.m} as the initial counter value, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2418,7 +2442,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by address \Address{M} to register \Register{\$D}. \item Move value from data memory pointed by address \Address{M} to register \Register{\$D}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2441,7 +2465,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Load immediate value \Value{I} to register \Register{\$D}. \item Load immediate value \Value{I} to register \Register{\$D}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2463,7 +2487,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Load immediate value \Value{I} (8-bit sign-extended) to accumulator register \Register{\$(0x18+D)}. \item Load immediate value \Value{I} (8-bit sign-extended) to accumulator register \Register{\$(0x18+D)}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2485,7 +2509,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}. \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2508,7 +2532,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}. \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
Decrements register \Register{\$arS}. Decrements register \Register{\$arS}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2532,7 +2556,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}. \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
Increments register \Register{\$arS}. Increments register \Register{\$arS}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2556,7 +2580,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}. \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
Add indexing register \Register{\$ixS} to register \Register{\$arS}. Add indexing register \Register{\$ixS} to register \Register{\$arS}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -2579,7 +2603,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from data memory pointed by address \Address{(\$cr << 8) | M} to register \Register{\$(0x18+D)}. \item Move value from data memory pointed by address \Address{(\$cr << 8) | M} to register \Register{\$(0x18+D)}.
Perform an additional operation depending on destination register. \item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -3049,7 +3073,8 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value from register \Register{\$S} to register \Register{\$D}. \item Move value from register \Register{\$S} to register \Register{\$D}.
Perform an additional operation depending on destination register. \item When moving to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\item When moving from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -3861,6 +3886,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeSeeAlso} \begin{DSPOpcodeSeeAlso}
\item \Opcode{SET40} \item \Opcode{SET40}
\item \nameref{subsec:SET40}
\end{DSPOpcodeSeeAlso} \end{DSPOpcodeSeeAlso}
\DSPOpcodeFlagsUnchanged \DSPOpcodeFlagsUnchanged
@ -3886,6 +3912,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeSeeAlso} \begin{DSPOpcodeSeeAlso}
\item \Opcode{SET16} \item \Opcode{SET16}
\item \nameref{subsec:SET40}
\end{DSPOpcodeSeeAlso} \end{DSPOpcodeSeeAlso}
\DSPOpcodeFlagsUnchanged \DSPOpcodeFlagsUnchanged
@ -3929,7 +3956,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from register \Register{\$S} to a memory pointed by address \Address{M}. \item Store value from register \Register{\$S} to a memory pointed by address \Address{M}.
Perform an additional operation depending on destination register. \item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -3951,7 +3978,8 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from source register \Register{\$S} to a memory location pointed by addressing \item Store value from source register \Register{\$S} to a memory location pointed by addressing
register \Register{\$arD}. Perform an additional operation depending on source register. register \Register{\$arD}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -3973,7 +4001,8 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from source register \Register{\$S} to a memory location pointed by addressing \item Store value from source register \Register{\$S} to a memory location pointed by addressing
register \Register{\$arD}. Decrement register \Register{\$arD}. Perform an additional operation depending on source register. register \Register{\$arD}. Decrement register \Register{\$arD}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -3996,7 +4025,8 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from source register \Register{\$S} to a memory location pointed by addressing \item Store value from source register \Register{\$S} to a memory location pointed by addressing
register \Register{\$arD}. Increment register \Register{\$arD}. Perform an additional operation depending on source register. register \Register{\$arD}. Increment register \Register{\$arD}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4020,7 +4050,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from source register \Register{\$S} to a memory location pointed by addressing \item Store value from source register \Register{\$S} to a memory location pointed by addressing
register \Register{\$arD}. Add indexing register \Register{\$ixD} to register \Register{\$arD}. register \Register{\$arD}. Add indexing register \Register{\$ixD} to register \Register{\$arD}.
Perform an additional operation depending on source register. \item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4043,7 +4073,7 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from register \Register{\$(0x1C+S)} to a memory pointed by address \Address{(\$cr << 8) | M}. \item Store value from register \Register{\$(0x1C+S)} to a memory pointed by address \Address{(\$cr << 8) | M}.
Perform an additional operation depending on destination register. \item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4070,7 +4100,6 @@ A ``-'' indicates that the flag retains its previous value, a ``0'' indicates th
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value from register \Register{\$acS.h} to a memory pointed by address \Address{(\$cr << 8) | M}. \item Store value from register \Register{\$acS.h} to a memory pointed by address \Address{(\$cr << 8) | M}.
Perform an additional operation depending on destination register.
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4403,6 +4432,7 @@ When the main and extension opcodes write to the same register, the register is
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}. \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}.
Post increment register \Register{\$arS}. Post increment register \Register{\$arS}.
\item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4423,6 +4453,7 @@ When the main and extension opcodes write to the same register, the register is
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}. \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}.
Add indexing register \Register{\$ixS} to register \Register{\$arS}. Add indexing register \Register{\$ixS} to register \Register{\$arS}.
\item When loading to \Register{\$ac0.m} or \Register{\$ac1.m}, optionally perform sign extension depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4662,6 +4693,7 @@ When the main and extension opcodes write to the same register, the register is
\item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}. \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}.
Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}. Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}.
Increment both \Register{\$ar0} and \Register{\$ar3}. Increment both \Register{\$ar0} and \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4689,6 +4721,7 @@ When the main and extension opcodes write to the same register, the register is
\item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}. \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}.
Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}. Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}. Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4717,6 +4750,7 @@ When the main and extension opcodes write to the same register, the register is
Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}. Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding
indexing register \Register{\$ix3} to addressing register \Register{\$ar3}. indexing register \Register{\$ix3} to addressing register \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4744,6 +4778,7 @@ When the main and extension opcodes write to the same register, the register is
\item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}. \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar0}.
Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}. Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}. Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4769,6 +4804,7 @@ When the main and extension opcodes write to the same register, the register is
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Move value of register \Register{\$(0x1c+S)} to the register \Register{\$(0x18+D)}. \item Move value of register \Register{\$(0x1c+S)} to the register \Register{\$(0x18+D)}.
\item When moving from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4824,6 +4860,7 @@ When the main and extension opcodes write to the same register, the register is
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value of register \Register{\$(0x1c+S)} in the memory pointed by register \Register{\$arD}. \item Store value of register \Register{\$(0x1c+S)} in the memory pointed by register \Register{\$arD}.
Post increment register \Register{\$arD}. Post increment register \Register{\$arD}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4845,6 +4882,7 @@ When the main and extension opcodes write to the same register, the register is
\item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}. \item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}.
Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}. Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}.
Increment both \Register{\$ar0} and \Register{\$ar3}. Increment both \Register{\$ar0} and \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4872,6 +4910,7 @@ When the main and extension opcodes write to the same register, the register is
\item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}. \item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}.
Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}. Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}. Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4900,6 +4939,7 @@ When the main and extension opcodes write to the same register, the register is
Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}. Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding
indexing register \Register{\$ix3} to addressing register \Register{\$ar3}. indexing register \Register{\$ix3} to addressing register \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4927,6 +4967,7 @@ When the main and extension opcodes write to the same register, the register is
\item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}. \item Store value from register \Register{\$acS.m} to memory location pointed by register \Register{\$ar0}.
Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}. Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$ar3}.
Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}. Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}
@ -4953,6 +4994,7 @@ When the main and extension opcodes write to the same register, the register is
\begin{DSPOpcodeDescription} \begin{DSPOpcodeDescription}
\item Store value of register \Register{\$(0x1c+S)} in the memory pointed by register \Register{\$arD}. \item Store value of register \Register{\$(0x1c+S)} in the memory pointed by register \Register{\$arD}.
Add indexing register \Register{\$ixD} to register \Register{\$arD}. Add indexing register \Register{\$ixD} to register \Register{\$arD}.
\item When storing from \Register{\$ac0.m} or \Register{\$ac1.m}, optionally apply saturation depending on the value of \RegisterField{\$sr.SXM} (see \nameref{subsec:SET40}).
\end{DSPOpcodeDescription} \end{DSPOpcodeDescription}
\begin{DSPOpcodeOperation} \begin{DSPOpcodeOperation}