\batchmode
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\documentclass[oneside,english,a4paper,10pt,oneside,openany,final]{memoir}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}

\makeatletter

\usepackage{array}                         % Setting typefaces on a column-wide basis
\usepackage{babel}                         % Manages language rules
\usepackage{bytefield}                     % Creation of byte overviews
\usepackage[a4paper, margin=1in]{geometry} % Page geometry
\usepackage{float}                         % Used for the H specifier in tables
\usepackage[T1]{fontenc}                   % Font encoding
\usepackage[latin9]{inputenc}              % Input encoding
\usepackage{listings}                      % Code listings
\usepackage{longtable}                     % LaTeX is hilarious and tables by default cannot span more than one page
\usepackage{lmodern}                       % Latin Modern font
\usepackage{microtype}                     % Allow conditional disabling of ligatures
\usepackage{multirow}                      % Multi-row tables
\usepackage{parskip}                       % Handle non-indented paragraphs "properly"
\usepackage{upquote}                       % Use proper quotes in verbatim/listing environments
\usepackage[bookmarks=true,
            bookmarksnumbered=true,
            colorlinks=true,
            linkcolor=blue,
            linktocpage=true,
            pdfcreator={Duddie},
            pdftex,
            pdfpagelabels=true,
            pdfpagemode=UseOutlines,
            pdfstartview=FitH,
            pdfsubject={GameCube DSP User's Manual},
            pdftitle={GameCube DSP User's Manual},
            plainpages=false
           ]{hyperref}                     % Support document hyperlinking

% Paragraph settings for main body text
\setlength{\parindent}{0pt}
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\setlength{\partopsep}{0pt}

% Disable ligatures in the teletype font family
\DisableLigatures[-]{family=tt*}

% Document front page material
\title{\textbf{\Huge GameCube DSP User's Manual}}
\author{Reverse-engineered and documented by Duddie \\ \href{mailto:duddie@walla.com}{duddie@walla.com}}
\date{\today\\v0.0.6}

% Title formatting commands
\newcommand{\OpcodeTitle}[1]{\subsection{\textbf{\Large #1}}}

% Formatting/self-documenting commands
\newcommand{\Address}[1]{\texttt{#1}}
\newcommand{\Code}[1]{\texttt{#1}}
\newcommand{\Exception}[1]{\texttt{#1}}
\newcommand{\Flag}[1]{\texttt{#1}}
\newcommand{\Function}[1]{\texttt{#1}}
\newcommand{\InlineExpression}[1]{\texttt{#1}}
\newcommand{\Opcode}[1]{\texttt{#1}}
\newcommand{\Register}[1]{\texttt{#1}}
\newcommand{\RegisterField}[1]{\texttt{#1}}
\newcommand{\Value}[1]{\texttt{#1}}
\newcommand{\Variable}[1]{\texttt{#1}}

% Creates a table displaying the bits given in a register
% Useful for avoiding boilerplate
%
% Accepts an address, register name, description, and bit layout (in that exact order)
%
\newcommand{\RegisterBitOverview}[4]{
  \begin{table}[H]
  \centering
  \begin{tabular}{|lcl|}
  \hline
  \Address{#1} & \Register{#2} & \multicolumn{1}{r|}{#3} \\ \hline
               & \texttt{#4}   &                         \\ \hline
  \end{tabular}
  \end{table}
}

% Environment for describing the functionality of bits following a \RegisterBitOverview
\newenvironment{RegisterBitDescriptions}
{
  \begin{table}[H]
  \centering
  \begin{tabular}{|l|l|l|p{10cm}|}
  \hline
  \textbf{Bit} & \textbf{Name} & \textbf{R/W} & \textbf{Action} \\ \hline
}
{
  \end{tabular}
  \end{table}
}

% Used within a RegisterBitDescriptions environment to describe a bit or series of bits.
\newenvironment{RegisterBitDescription}[4]
{
  #1 & \RegisterField{#2} & \texttt{#3} & #4 \\ \hline
}
{
}

% Used for describing functions that provide pseudocode
\newcommand{\FunctionPseudocode}[3]
{
  \texttt{#1}

  \begin{itemize}
  \item \textbf{Description}: \\ #2
  \item \textbf{Operation}: \\ #3
  \end{itemize}
}

% bitbox helper for monospaced text so all usage sites of the bitbox don't
% need to specify \texttt{} over and over.
%
% First argument is the size of the bitbox (1-based).
% Second argument is the text to place within the bitbox.
%
\newcommand{\monobitbox}[2]{\bitbox{#1}{\texttt{#2}}}

% Environment for specifying an opcode.
\newenvironment{DSPOpcode}[1]
{
  \OpcodeTitle{#1}
}
{
  % Each opcode should be followed by a page break to maintain clean separation of opcodes.
  \pagebreak{}
}

% Defines the formatting for an opcode bytefield.
% The given argument specifies how many bits wide
% the bytefield should be.
%
% Note that we perform a subtraction by one, since
% we want to make the header range from 0-(N-1) to
% match regular bit field listings (i.e. we turn a 1-based
% specification of bits into a 0-based one)
\newenvironment{DSPOpcodeBytefield}[1]
{
  \begin{center}
  \begin{bytefield}[endianness=big]{#1}
    \bitheader{0-{\the\numexpr #1 - 1\relax}} \\
}
{
  \end{bytefield}
  \end{center}
}

% Environment for describing the format of a DSP opcode
\lstnewenvironment{DSPOpcodeFormat}
{
  \textbf{Format:}
  \lstset{basicstyle=\ttfamily}
}
{
}

% Environment for providing a DSP opcode description
\newenvironment{DSPOpcodeDescription}
{
  \textbf{Description:}
  \begin{description}
}
{
  \end{description}
}

% Environment for providing the pseudocode displaying the functional operation of an opcode
\lstnewenvironment{DSPOpcodeOperation}
{
\textbf{Operation:}
\lstset{basicstyle=\ttfamily}
}
{
}

% Environment for describing a not for a DSP opcode
\newenvironment{DSPOpcodeNote}
{
  \textbf{Note:}
  \begin{description}
}
{
  \end{description}
}

% Environment for a See Also section per opcode.
\newenvironment{DSPOpcodeSeeAlso}
{
  \textbf{See also:}
  \begin{description}
}
{
  \end{description}
}

\makeatother
\begin{document}
\maketitle{}

\pagebreak{}
\vspace*{\fill}

Copyright (c) 2005 Duddie. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''.

\pagebreak{}
\tableofcontents{}
\pagebreak{}

\addcontentsline{toc}{chapter}{Disclaimer}
\textbf{\LARGE Disclaimer}
\vspace{5mm}

This documentation is no way endorsed by or affiliated with Nintendo, Nintendo of America or its licenses. GameCube is a trademark of Nintendo of America. Other trademarked names used in this documentation are trademarks of their respective owners.

This documentation is provided ``AS IS'' and can be wrong, incomplete or in any other way useless.

This documentation cannot be used for any commercial purposes without prior agreement received from authors.

The purpose of this documentation is purely academic and it aims at understanding described hardware. It is based on academic reverse engineering of hardware.

\pagebreak{}
\addcontentsline{toc}{chapter}{Version History}
\textbf{\LARGE Version History}
\vspace{5mm}

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|l|}
\hline
\textbf{Version} & \textbf{Date} & \textbf{Author} & \textbf{Change}                                                                          \\ \hline
0.0.1            & 2005.05.08    & Duddie          & Initial release                                                                          \\ \hline
0.0.2            & 2005.05.09    & Duddie          & Added \Register{\$prod} and \Register{\$config} registers, table of opcodes, disclaimer. \\ \hline
0.0.3            & 2005.05.09    & Duddie          & Fixed BLOOP and BLOOPI and added description of the loop stack.                          \\ \hline
0.0.4            & 2005.05.12    & Duddie          & Added preliminary DSP memory map and opcode syntax.                                      \\ \hline
0.0.5            & 2018.04.09    & Lioncache       & Converted document over to LaTeX.                                                        \\ \hline
0.0.6            & 2018.04.13    & BhaaL           & Updated register tables, fixed opcode operations                                         \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\addcontentsline{toc}{chapter}{GNU Documentation License 1.2}

GNU Free Documentation License

Version 1.2, November 2002

  Copyright (C) 2000,2001,2002  Free Software Foundation, Inc.
  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.

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The Free Software Foundation may publish new, revised versions of the GNU Free Documentation License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. See https://www.gnu.org/licenses/.

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\pagebreak{}

\chapter{Overview}

\section{DSP Memory Map}

The DSP accesses memory in words, so all addresses refer to words. A DSP word is 16 bits in size.

Instruction Memory (IMEM) is divided into instruction RAM (IRAM) and instruction ROM (IROM).

Exception vectors are located at the top of the RAM and occupy the first 8 words.

DSP IRAM is mapped through as first 8KB of ARAM (Accelerator RAM), therefore the CPU can DMA DSP code to DSP IRAM. This usually occurs during boot time, as the DSP ROM is not enabled at cold reset and needs to be reenabled by a small stub executed in IRAM.

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|}
\hline
\begin{tabular}[c]{@{}l@{}}\texttt{0x0000}\\ \\ \\ \\ \\ \\ \\ \\ \texttt{0x0FFF}\end{tabular} & \texttt{IRAM} \\ \hline
 &  \\ \hline
\begin{tabular}[c]{@{}l@{}}\texttt{0x8000}\\ \\ \\ \\ \\ \\ \\ \\ \texttt{0x8FFF}\end{tabular} & \texttt{IROM} \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\chapter{Registers}

\section{Register names}

The DSP has 32 16-bit registers, although their individual purpose and their function differ from register to register.

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|l|}
\hline
                &                  &                      &                             \\ \hline
\Register{\$0}  & \Register{\$r00} & \Register{\$ar0}     & Addressing register 0       \\ \hline
\Register{\$1}  & \Register{\$r01} & \Register{\$ar1}     & Addressing register 1       \\ \hline
\Register{\$2}  & \Register{\$r02} & \Register{\$ar2}     & Addressing register 2       \\ \hline
\Register{\$3}  & \Register{\$r03} & \Register{\$ar3}     & Addressing register 3       \\ \hline
\Register{\$4}  & \Register{\$r04} & \Register{\$ix0}     & Indexing register 0         \\ \hline
\Register{\$5}  & \Register{\$r05} & \Register{\$ix1}     & Indexing register 1         \\ \hline
\Register{\$6}  & \Register{\$r06} & \Register{\$ix2}     & Indexing register 2         \\ \hline
\Register{\$7}  & \Register{\$r07} & \Register{\$ix3}     & Indexing register 3         \\ \hline
\Register{\$8}  & \Register{\$r08} & \Register{\$wr0}     & Wrapping register 0         \\ \hline
\Register{\$9}  & \Register{\$r09} & \Register{\$wr1}     & Wrapping register 1         \\ \hline
\Register{\$10} & \Register{\$r0A} & \Register{\$wr2}     & Wrapping register 2         \\ \hline
\Register{\$11} & \Register{\$r0B} & \Register{\$wr3}     & Wrapping register 3         \\ \hline
\Register{\$12} & \Register{\$r0C} & \Register{\$st0}     & Call stack register         \\ \hline
\Register{\$13} & \Register{\$r0D} & \Register{\$st1}     & Data stack register         \\ \hline
\Register{\$14} & \Register{\$r0E} & \Register{\$st2}     & Loop address stack register \\ \hline
\Register{\$15} & \Register{\$r0F} & \Register{\$st3}     & Loop counter register       \\ \hline
\Register{\$16} & \Register{\$r10} & \Register{\$ac0.h}   & 40-bit Accumulator 0 (high) \\ \hline
\Register{\$17} & \Register{\$r11} & \Register{\$ac1.h}   & 40-bit Accumulator 1 (high) \\ \hline
\Register{\$18} & \Register{\$r12} & \Register{\$config}  & Config register             \\ \hline
\Register{\$19} & \Register{\$r13} & \Register{\$sr}      & Status register             \\ \hline
\Register{\$20} & \Register{\$r14} & \Register{\$prod.l}  & Product register (low)      \\ \hline
\Register{\$21} & \Register{\$r15} & \Register{\$prod.m1} & Product register (mid 1)    \\ \hline
\Register{\$22} & \Register{\$r16} & \Register{\$prod.h}  & Product register (high)     \\ \hline
\Register{\$23} & \Register{\$r17} & \Register{\$prod.m2} & Product register (mid 2)    \\ \hline
\Register{\$24} & \Register{\$r18} & \Register{\$ax0.l}   & 32-bit Accumulator 0 (low)  \\ \hline
\Register{\$25} & \Register{\$r19} & \Register{\$ax1.l}   & 32-bit Accumulator 1 (low)  \\ \hline
\Register{\$26} & \Register{\$r1A} & \Register{\$ax0.h}   & 32-bit Accumulator 0 (high) \\ \hline
\Register{\$27} & \Register{\$r1B} & \Register{\$ax1.h}   & 32-bit Accumulator 1 (high) \\ \hline
\Register{\$28} & \Register{\$r1C} & \Register{\$ac0.l}   & 40-bit Accumulator 0 (low)  \\ \hline
\Register{\$29} & \Register{\$r1D} & \Register{\$ac1.l}   & 40-bit Accumulator 1 (low)  \\ \hline
\Register{\$30} & \Register{\$r1E} & \Register{\$ac0.m}   & 40-bit Accumulator 0 (mid)  \\ \hline
\Register{\$31} & \Register{\$r1F} & \Register{\$ac1.m}   & 40-bit Accumulator 1 (mid)  \\ \hline
\end{tabular}
\end{table}

\section{Accumulators}

The DSP has two long 40-bit accumulators (\Register{\$acX}) and their short 24-bit forms (\Register{\$acsX}) that reflect the
upper part of 40-bit accumulator. There are additional two 32-bit accumulators (\Register{\$axX}).

\textbf{Accumulators \Register{\$acX}:}

40-bit accumulator \Register{\$acX} (\Register{\$acX.hml}) consists of registers:

\begin{lstlisting}[language=C++]
$acX = $acX.h << 32 | $acX.m << 16 | $acX.l
\end{lstlisting}

\textbf{Short accumulators \Register{\$acs.X}:}

24-bit accumulator \Register{\$acsX} (\Register{\$acX.hm}) consists of the upper 24 bits of accumulator \Register{\$acX}.

\begin{lstlisting}[language=C++]
$acsX = $acX.h << 16 | $acX.m
\end{lstlisting}

\textbf{Additional accumulators \Register{\$axX}:}

\begin{lstlisting}[language=C++]
$axX = $axX.h << 16 | $axX.l
\end{lstlisting}

\pagebreak{}

\section{Stacks}

The GameCube DSP contains four stack registers:

\begin{itemize}
  \item \Register{\$st0} -- Call stack register
  \item \Register{\$st1} -- Data stack register
  \item \Register{\$st2} -- Loop address stack register
  \item \Register{\$st3} -- Loop counter register
\end{itemize}

Stacks are implemented in hardware and have limited depth. The data stack is limited to four values
and the call stack is limited to eight values. The loop stack is limited to four values.
Upon underflow or overflow of any of the stack registers exception \Exception{STOVF} is raised.

The loop stack is used to control execution of repeated blocks of instructions. Whenever there is a value in
\Register{\$st2} and the current PC is equal to the value in \Register{\$st2}, then the value in \Register{\$st3} is decremented.
If the value is not zero, then the PC is modified by the value from call stack \Register{\$st0}. Otherwise values from the call stack
\Register{\$st0} and both loop stacks, \Register{\$st2} and \Register{\$st3}, are popped and execution continues at the next opcode.

\pagebreak{}

\section{Config register}

Its purpose is unknown at this time. It is written with \Value{0x00FF} and \Value{0x0004} values.

\pagebreak{}

\section{Status register}

Status register \Register{\$sr} reflects flags computed on accumulators after logical or arithmetic operations.
Furthermore, it also contains control bits to configure the flow of certain operations.

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|}
\hline
\textbf{Bit} & \textbf{Name} & \textbf{Comment}                                              \\ \hline
\texttt{15}  & \texttt{SU}   & Operands are signed (1 = unsigned)                            \\ \hline
\texttt{14}  & \texttt{SXM}  & Sign extension mode (0 = \texttt{set16}, 1 = \texttt{set40})  \\ \hline
\texttt{13}  & \texttt{AM}   & Product multiply result by 2 (when \texttt{AM = 0})           \\ \hline
\texttt{12}  &               &                                                               \\ \hline
\texttt{11}  & \texttt{EIE}  & External interrupt enable                                     \\ \hline
\texttt{10}  &               &                                                               \\ \hline
\texttt{9}   & \texttt{IE}   & Interrupt enable                                              \\ \hline
\texttt{8}   & \texttt{0}    & Hardwired to 0?                                               \\ \hline
\texttt{7}   & \texttt{OS}   & Overflow (sticky)                                             \\ \hline
\texttt{6}   & \texttt{LZ}   & Logic zero                                                    \\ \hline
\texttt{5}   &               & Top two bits are equal                                        \\ \hline
\texttt{4}   & \texttt{AS}   & Above s32                                                     \\ \hline
\texttt{3}   & \texttt{S}    & Sign                                                          \\ \hline
\texttt{2}   & \texttt{Z}    & Arithmetic zero                                               \\ \hline
\texttt{1}   & \texttt{O}    & Overflow                                                      \\ \hline
\texttt{0}   & \texttt{C}    & Carry                                                         \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\section{Product register}

The product register is a register containing the intermediate product of a multiply or multiply and accumulation operation.
It's result should never be used for calculation although the register can be read or written.
It reflects the state of the internal multiply unit. The product is 40 bits with 1 bit of overflow.

\begin{lstlisting}[language=C++]
$prod = ($prod.h << 32) + (($prod.m1 + $prod.m2) << 16) + $prod.l
\end{lstlisting}

It needs to be noted that \InlineExpression{\$prod.m1 + \$prod.m2} overflow bit (bit 16) will be added to \Register{\$prod.h}.

Bit \RegisterField{\$sr.AM} affects the result of the multiply unit.
If \RegisterField{\$sr.AM} is equal 0 then the result of every multiply operation will be multiplied by two.

\pagebreak{}

\chapter{Exceptions}

\section{Exception processing}

Exception processing happens by setting the program counter to different exception vectors.
At exception time, the exception program counter is stored at call stack \Register{\$st0} and status register \Register{\$sr} is stored at data stack \Register{\$st1}.

\textbf{Operation:}
\begin{lstlisting}[basicstyle=\ttfamily]
PUSH_STACK($st0);
$st0 = $pc;
PUSH_STACK($st1);
$st1 = $sr;
$pc = exception_nr * 2;
\end{lstlisting}

\pagebreak{}

\section{Exception vectors}

Exception vectors are located at address \Address{0x0000} in Instruction RAM.

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|l|}
\hline
\textbf{Level} & \textbf{Address} & \textbf{Name}  & \textbf{Description}          \\ \hline
0              & \Address{0x0000} & \texttt{RESET} &                               \\ \hline
1              & \Address{0x0002} & \texttt{STOVF} & Stack under/overflow          \\ \hline
2              & \Address{0x0004} &                &                               \\ \hline
3              & \Address{0x0006} &                &                               \\ \hline
4              & \Address{0x0008} &                &                               \\ \hline
5              & \Address{0x000A} & \texttt{ACCOV} & Accelerator address overflow  \\ \hline
6              & \Address{0x000C} &                &                               \\ \hline
7              & \Address{0x000E} & \texttt{INT}   & External interrupt (from CPU) \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\chapter{Hardware interface}

\section{Hardware registers}

Hardware registers occupy the address space at \Address{0xFFxx} in DSP memory space. Each register is 16 bits in width.

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|}
\hline
\textbf{Address} & \textbf{Name}    & \textbf{Description}          \\ \hline
\multicolumn{3}{|l|}{\textit{Mailboxes}}                            \\ \hline
\Address{0xFFFE} & \Register{CMBH}  & CPU Mailbox H                 \\ \hline
\Address{0xFFFF} & \Register{CMBL}  & CPU Mailbox L                 \\ \hline
\Address{0xFFFC} & \Register{DMBH}  & DSP Mailbox H                 \\ \hline
\Address{0xFFFD} & \Register{DMBL}  & DSP Mailbox L                 \\ \hline
\multicolumn{3}{|l|}{\textit{DMA Interface}}                        \\ \hline
\Address{0xFFCE} & \Register{DSMAH} & Memory address H              \\ \hline
\Address{0xFFCF} & \Register{DSMAL} & Memory address L              \\ \hline
\Address{0xFFCD} & \Register{DSPA}  & DSP memory address            \\ \hline
\Address{0xFFC9} & \Register{DSCR}  & DMA control                   \\ \hline
\Address{0xFFCB} & \Register{DSBL}  & Block size                    \\ \hline
\multicolumn{3}{|l|}{\textit{Accelerator}}                          \\ \hline
\Address{0xFFD4} & \Register{ACSAH} & Accelerator start address H   \\ \hline
\Address{0xFFD5} & \Register{ACSAL} & Accelerator start address L   \\ \hline
\Address{0xFFD6} & \Register{ACEAH} & Accelerator end address H     \\ \hline
\Address{0xFFD7} & \Register{ACEAL} & Accelerator end address L     \\ \hline
\Address{0xFFD8} & \Register{ACCAH} & Accelerator current address H \\ \hline
\Address{0xFFD9} & \Register{ACCAL} & Accelerator current address L \\ \hline
\Address{0xFFDD} & \Register{ACDAT} & Accelerator data              \\ \hline
\multicolumn{3}{|l|}{\textit{Interrupts}}                           \\ \hline
\Address{0xFFFB} & \Register{DIRQ}  & IRQ request                   \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\section{Interrupts}

The DSP can raise interrupts at the CPU. Interrupts are usually used to signal that a DSP mailbox has been filled with new data.

\RegisterBitOverview{0xFFFB}{DIRQ}{IRQ Request}{---- ---- ---- ---I}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{0}{I}{W}{\Value{1} - Raise interrupt at CPU}
\end{RegisterBitDescriptions}

\pagebreak{}

\section{Mailboxes}

\subsection{CPU Mailbox}

The CPU Mailbox (CMB) is a register that allows sending 31 bits of information from the CPU to the DSP.

\RegisterBitOverview{0xFFFE}{CMBH}{CPU Mailbox H}{Mddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15}{M}{R}{
  \begin{tabular}[c]{@{}l@{}}
    \Value{1} - Mailbox contains mail from the CPU\\ \Value{0} - Mailbox empty
  \end{tabular}
}
\RegisterBitDescription{14--0}{d}{R}{Bits 30--16 of the mail sent from the CPU}
\end{RegisterBitDescriptions}

\RegisterBitOverview{0xFFFF}{CMBL}{CPU Mailbox L}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{R}{
  Bits 15--0 of mail sent from the CPU. Reading of this register by the DSP causes the \RegisterField{CMBH.M}
  bit to be cleared.
}
\end{RegisterBitDescriptions}

\textbf{Operation:}

From the CPU side, software usually checks the \RegisterField{M} bit of \Register{CMBH}. It takes action only in the case that this bit is \Value{0}.
Said action is to write \Register{CMBH} first and then \Register{CMBL}. After writing to \Register{CMBL}, the mail is ready to be received by the DSP.

From the DSP side, the DSP loops by probing the \RegisterField{M} bit. When this bit is \Value{1}, the DSP reads \Register{CMBH} first and then \Register{CMBL}.
After reading \Register{CMBL}, \RegisterField{CMBH.M} will be cleared.

\pagebreak{}

\subsection{DSP Mailbox}

The DSP mailbox (DMB) is an interface to send 31 bits of information from the DSP to the CPU.

\RegisterBitOverview{0xFFFC}{DMBH}{DSP Mailbox H}{Mddd dddd dddd dddd}

\begin{table}[htb]
\centering
\begin{tabular}{|l|l|l|l|}
\hline
\textbf{Bit}        & \textbf{Name}      & \textbf{R/W} & \textbf{Action}                                                                                                      \\ \hline
\multirow{2}{*}{15} & \multirow{2}{*}{M} & \texttt{R}   & \begin{tabular}[c]{@{}l@{}}\Value{1} - Mailbox has not been received by CPU\\ \Value{0} - Mailbox empty\end{tabular} \\ \cline{3-4}
                    &                    & \texttt{W}   & Does not matter. It will be set when DMBL is written to                                                              \\ \hline
14--0               & \RegisterField{d}  & \texttt{W}   & Bits 30--16 of mail sent from the DSP to the CPU                                                                     \\ \hline
\end{tabular}
\end{table}

\RegisterBitOverview{0xFFFD}{DMBL}{DSP Mailbox L}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{W}{
  Bits 15--0 of mail sent from the DSP to the CPU. Writing to this register by the DSP causes the
  \RegisterField{DMBH.M} bit to be set, indicating that the mail is ready.
}
\end{RegisterBitDescriptions}

\textbf{Operation:}

Sending mail from the DSP to the CPU can be achieved by writing mail to register \Register{DMBH} and then to register \Register{DMBL} in that order.
After writing to \Register{DMBL}, bit \RegisterField{DMBH.M} will be set, signaling that the mail is ready to be received by the CPU.
If the DSP needs to receive a response from the CPU, then it usually waits for the \RegisterField{M} bit to be cleared after sending a mail.
If the DSP does processing when the CPU receives a mail, then it waits for the \RegisterField{M} bit to be cleared before issuing another mail to the CPU.

\pagebreak{}

\subsection{DMA}

The GameCube DSP is connected to the memory bus through a DMA channel. DMA can be used to transfer data between DSP memory (both instruction and data) and main memory.

\RegisterBitOverview{0xFFCE}{DSMAH}{Memory Address H}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{R}{Bits 31--16 of the main memory address}
\end{RegisterBitDescriptions}

\RegisterBitOverview{0xFFCF}{DSMAL}{Memory Address L}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{R}{Bits 15--0 of the main memory address}
\end{RegisterBitDescriptions}

\RegisterBitOverview{0xFFCD}{DSPA}{DSP Address}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{W}{Bits 15--0 of the DSP memory address}
\end{RegisterBitDescriptions}

\RegisterBitOverview{0xFFCB}{DSBL}{DSP Address}{dddd dddd dddd dddd}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{W}{Length in bytes to transfer. Writing to this register starts a DMA transfer.}
\end{RegisterBitDescriptions}

\RegisterBitOverview{0xFFC9}{DSCR}{DSP Address}{---- ---- ---- ----}

\begin{RegisterBitDescriptions}
\RegisterBitDescription{15--0}{d}{W}{}
\end{RegisterBitDescriptions}

\pagebreak{}

\section{Accelerator}

The accelerator is used to transfer data from accelerator memory (ARAM) to DSP memory. The accelerator area can be marked with \Register{ACSA} (start) and \Register{ACEA} (end) addresses.
Current address for the accelerator can be set or read from the \Register{ACCA} register. Reading from accelerator memory is done by reading from the \Register{ACDAT} register.
This register contains data from ARAM pointed to by the \Register{ACCA} register.
After reading the data, \Register{ACCA} is incremented by one.
After \Register{ACCA} grows bigger than the area pointed to by \Register{ACEA}, it gets reset to a value from \Register{ACSA} and the \Exception{ACCOV} interrupt is generated.

\pagebreak{}

\chapter{Opcodes}

\section{Opcode syntax}

\vspace{3mm}
\textbf{Basic opcode syntax:}

\begin{lstlisting}[basicstyle=\ttfamily]
OPC    <opcode parameters>
\end{lstlisting}

\textit{Above syntax is correct for all opcodes.}
\vspace{5mm}

\textbf{\textit{EXAMPLES:}}
\begin{lstlisting}[basicstyle=\ttfamily]
JMP  0x0300
CALL loop
HALT
\end{lstlisting}

\vspace{5mm}

\textbf{Extended syntax:}

\begin{lstlisting}[basicstyle=\ttfamily]
OPC'EXOPC <opcode parameters> : <extended opcode parameters>
\end{lstlisting}

\textit{Above syntax is correct only for arithmetic opcodes, because those can be extended with additional load/store unit behavior.}
\vspace{5mm}

\textbf{\textit{EXAMPLES:}}
\begin{lstlisting}[basicstyle=\ttfamily]
DECM'L $acs0 : $acl.m, @ar0
NX'MV  : $acx1.h, $ac0.l
\end{lstlisting}

\pagebreak{}

\section{Operation --- Used Functions}

Functions used for describing opcode operation.

\begin{description}
  \item \Function{PUSH\_STACK(\$stR)}
  \begin{description}
	\item \textbf{Description:} \\ 
      Pushes value onto given stack referenced by stack register \Register{\$stR}. Operation moves values down in internal stack.

    \item \textbf{Operation:} \\
      \Code{stack\_stR[stack\_ptr\_stR++] = \$stR;}
  \end{description}
\end{description}

\begin{description}
  \item \Function{POP\_STACK(\$stR)}
  \begin{description}
	\item \textbf{Description:} \\ 
      Pops value from stack referenced by stack register \Register{\$stR}. Operation moves values up in internal stack.

    \item \textbf{Operation:} \\
      \Code{\$stR = stack\_stR[--stack\_ptr\_stR];}
  \end{description}
\end{description}

\begin{description}
  \item \Function{FLAGS(val)}
  \begin{description}
    \item\textbf{Description:} \\
      Calculates flags depending on given value or result of operation and sets corresponding bits in status register \Register{\$sr}.
  \end{description}
\end{description}

\begin{description}
  \item \Function{EXECUTE\_OPCODE(new\_pc)}
  \begin{description}
    \item \textbf{Description:} \\
      Executes opcode at the given \Variable{new\_pc} address.
  \end{description}
\end{description}

\pagebreak{}

\section{Bit meanings}

Opcode decoding uses special naming for bits and their decimal representations to provide easier understanding of bit fields in the opcode.

\begin{table}[H]
\centering
\begin{tabular}{|l|l|l|}
\hline
\textbf{Binary form}          & \textbf{Decimal form}          & \textbf{Meaning}                             \\ \hline
\texttt{d, dd, ddd, dddd}     & \texttt{D}                     & Destination register                         \\ \hline
\texttt{s, ss, sss, ssss}     & \texttt{S}                     & Source register                              \\ \hline
\texttt{t, tt, ttt, tttt}     & \texttt{T}                     & Source register                              \\ \hline
\texttt{r, rr, rrr, rrrr}     & \texttt{R}                     & Register (either source or destination)      \\ \hline
\texttt{Aaaaa(a)}             & \texttt{A, addrA}              & Address in either instruction or data memory \\ \hline
\texttt{xxxx xxxx}            & \texttt{X}                     & Extended opcode                              \\ \hline
\texttt{mmm(m)}               & \texttt{M, addrM}              & Address in memory                            \\ \hline
\texttt{iii(i)}               & \texttt{I, Imm}                & Immediate value                              \\ \hline
\texttt{cccc}                 & \texttt{cc}                    & Condition (see conditional opcodes)          \\ \hline
\end{tabular}
\end{table}

\pagebreak{}

\section{Conditional opcodes}

Conditional opcodes are executed only when the condition described by their encoded conditional field has been met.
The groups of conditional instructions are, \Opcode{CALL}, \Opcode{JMP}, \Opcode{IF}, and \Opcode{RET}.

\begin{table}[H]
\centering
\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
\end{tabular}
\end{table}

\textbf{Note:}

There are two pairs of conditions that work similar: \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).

\pagebreak{}

\section{Alphabetical list of opcodes}

\pagebreak{}

\begin{DSPOpcode}{ADD}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0100} & \monobitbox{4}{110d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADD $acD, $ac(1-D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds accumulator \Register{\$ac(1-D)} to accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD += $ac(1-D)
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDARN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0001} & \monobitbox{4}{ssdd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDARN $arD, $ixS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds indexing register \Register{\$ixS} to an addressing register \Register{\$arD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arD += $ixS
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDAX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0100} & \monobitbox{4}{10sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDAX $acD, $axS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds secondary accumulator \Register{\$axS} to accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD += $axS
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDAXL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{00sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDAXL $acD, $axS.l
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds secondary accumulator \Register{\$axS.l} to accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD += $axS.l
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{0000} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDI $amR, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds a 16-bit sign-extended immediate to mid accumulator \Register{\$acD.hm}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.hm += #I
    FLAGS($acD)
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDIS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{010d} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDIS $acD, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds an 8-bit sign-extended immediate to mid accumulator \Register{\$acD.hm}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.hm += #I
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0100} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDP $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds the product register to the accumulator register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD += $prod
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDPAXZ}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{10sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDPAXZ $acD, $axS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds secondary accumulator \Register{\$axS} to product register and stores result
          in accumulator register. Low 16-bits of \Register{\$acD} (\Register{\$acD.l}) are set to 0.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.hm = $prod.hm + $ax.h
    $acD.l = 0
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ADDR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0100} & \monobitbox{4}{0ssd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ADDR $acD, $(0x18+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Adds register \Register{\$(0x18+S)} to the accumulator \Register{\$acD} register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD += $(0x18+S)
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ANDC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0011} & \monobitbox{4}{110d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ANDC $acD.m, $ac(1-D).m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logic AND middle part of accumulator \Register{\$acD.m} with middle part of accumulator \Register{\$ax(1-D)}.m.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m &= $ac(1-D).m
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ANDCF}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{1010} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ANDCF $acD.m, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Sets the logic zero (\Flag{LZ}) flag in status register \Register{\$sr} if the result of the logical AND operation
          involving the mid part of accumulator \Register{\$acD.m} and the immediate value \Value{I} is equal to immediate value \Value{I}.
          If the logical AND operation does not result in a value equal to \Value{I}, then the \Flag{LZ} flag is cleared.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    IF ($acD.m & I) == I
        $sr.LZ = 1
    ELSE
        $sr.LZ = 0
    ENDIF
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ANDF}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{1100} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ANDF $acD.m, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Sets the logic zero (\Flag{LZ}) flag in status register \Register{\$sr} if the result of the logic AND operation
          involving the mid part of accumulator \Register{\$acD.m} and the immediate value \Value{I} is equal to zero.
          If the result is not equal to zero, then the \Flag{LZ} flag is cleared.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    IF ($acD.m & I) == 0
        $sr.LZ = 1
    ELSE
        $sr.LZ = 0
    ENDIF
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ANDI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{0100} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ANDI $acD.m, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Performs a logical AND with the mid part of accumulator \Register{\$acD.m} and the immediate value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m &= #I
    FLAGS($acD)
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ANDR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0011} & \monobitbox{4}{01sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ANDR $acD.m, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Performs a logical AND with the middle part of accumulator \Register{\$acD.m} and the high part of secondary accumulator, \Register{\$axS.h}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m &= $axS.h
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ASL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{010r} & \monobitbox{4}{10ii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ASL $acR, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Arithmetically left shifts the accumulator \Register{\$acR} by the amount specified by immediate \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR <<= I
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ASR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{010r} & \monobitbox{4}{11ii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ASR $acR, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Arithmetically right shifts accumulator \Register{\$acR} specified by the value calculated by negating sign-extended bits 0-6.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR >>= I
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ASR16}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1001} & \monobitbox{4}{r001} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ASR16 $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Arithmetically right shifts accumulator \Register{\$acR} by 16.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR >>= 16
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{BLOOP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{011r} & \monobitbox{4}{rrrr} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    BLOOP $R, addrA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Repeatedly execute a block of code starting at the following opcode until the counter specified by the value from register
          \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
          \Register{\$st2} and the repeat address is pushed on call stack \Register{\$st0}. Up to 4 nested loops are allowed.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $st0 = $pc + 2
    $st2 = addrA
    $st3 = $R
    $pc += 2

    // On real hardware, the below does not happen,
    // this opcode only sets stack registers
    WHILE ($st3--)
        DO
            EXECUTE_OPCODE($pc)
        WHILE($pc != $st2)
        $pc = $st0
    END
    $pc = addrA + 1
    // Remove values from stack
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{BLOOPI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0001} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    BLOOPI #I, addrA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Repeatedly execute a block of code starting at the following opcode until the counter specified by the immediate value \Value{I}
          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
          \Register{\$st2} and the repeat address is pushed on call stack \Register{\$st0}. Up to 4 nested loops are allowed.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $st0 = $pc + 2
    $st2 = addrA
    $st3 = I
    $pc += 2

    // On real hardware, the below does not happen,
    // this opcode only sets stack registers
    WHILE ($st3--)
        DO
            EXECUTE_OPCODE($pc)
        WHILE($pc != $st2)
        $pc = $st0
    END
    $pc = addrA + 1
    // Remove values from stack
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CALL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1011} & \monobitbox{4}{1111} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CALL addressA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Call function. Push program counter of the instruction following ``call'' to call stack \Register{\$st0}.
          Set program counter to address represented by the value that follows this \Opcode{CALL} instruction.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    // Must skip value that follows "call"
    PUSH_STACK($st0)
    $st0 = $pc + 2
    $pc = addressA
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CALLcc}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1011} & \monobitbox{4}{cccc} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CALLcc addressA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Call function if condition \Flag{cc} has been met. Push program counter of the instruction following
          ``call'' to call stack \Register{\$st0}. Set program counter to address represented by the value that
          follows this \Opcode{CALL} instruction.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    // Must skip value that follows "call"
    IF (cc)
        PUSH_STACK($st0)
        $st0 = $pc + 2
        $pc = addressA
    ELSE
        $pc += 2
    ENDIF
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CALLR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0111} & \monobitbox{4}{rrr1} & \monobitbox{4}{1111}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CALLR $R
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Call function. Push program counter of the instruction following ``call'' to call stack \Register{\$st0}.
          Set program counter to register \Register{\$R}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    PUSH_STACK($st0)
    $st0 = $pc + 1
    $pc = $R
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CLR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1000} & \monobitbox{4}{r001} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CLR $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Clears accumulator \Register{\$acR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR = 0
    FLAGS($acR)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CLRL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{110r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CLRL $acR.l
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Clears \Register{\$acR.l} - low 16 bits of accumulator \Register{\$acR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR.l = 0
    FLAGS($acR)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CLRP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1000} & \monobitbox{4}{0100} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CLRP
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Clears product register \Register{\$prod}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod = 0 // See note below
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeNote}
    \item Actually product register gets cleared by setting registers with following values:
    \begin{lstlisting}[basicstyle=\ttfamily]
      $prod.l  = 0x0000
      $prod.m1 = 0xfff0
      $prod.h  = 0x00ff
      $prod.m2 = 0x0010
    \end{lstlisting}
  \end{DSPOpcodeNote}
\end{DSPOpcode}

\begin{DSPOpcode}{CMP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1000} & \monobitbox{4}{0010} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CMP
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Compares accumulator \Register{\$ac0} with accumulator \Register{\$ac1}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $sr = FLAGS($ac0 - $ac1)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CMPI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{1000} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CMPI $amD, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Compares mid accumulator \Register{\$acD.hm} (\Register{\$amD}) with sign-extended immediate value \Value{I}.
          However, flags are set with regards to the whole accumulator register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    res = ($acD.hm - I) | $acD.l
    FLAGS(res)
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{CMPIS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{011d} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    CMPIS $acD, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Compares accumulator with short immediate. Comparison is performed by subtracting the short immediate (8-bit sign-extended)
          from mid accumulator \Register{\$acD.hm} and computing flags based on whole accumulator \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    FLAGS($acD - #I)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{DAR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{01dd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    DAR $arD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Decrement address register \Register{\$arD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arD--
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{DEC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{101d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    DEC $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Decrements accumulator \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD--
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{DECM}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{100d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    DECM $acsD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Decrements 24-bit mid-accumulator \Register{\$acsD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acsD--
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{HALT}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0020} & \monobitbox{4}{0001}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    HALT
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Stops execution of DSP code. Sets bit \RegisterField{DSP\_CR\_HALT} in register \Register{DREG\_CR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    DREG_CR |= DSP_CR_HALT;
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{IAR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{10dd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    IAR $arD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Increment address register \Register{\$arD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arD++
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{IFcc}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{0111} & \monobitbox{4}{cccc}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    IFcc
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Executes the following opcode if the condition described by \Flag{cccc} has been met.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    IF (cc)
        EXECUTE_OPCODE($pc + 1)
    ELSE
        $pc += 2
    ENDIF
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ILRR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001d} & \monobitbox{4}{0001} & \monobitbox{4}{00ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ILRR $acD.m, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from instruction memory pointed by addressing register \Register{\$arS}
          to mid accumulator register \Register{\$acD.m}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m = MEM[$arS]
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ILRRD}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001d} & \monobitbox{4}{0001} & \monobitbox{4}{01ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ILRRD $acD.m, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from instruction memory pointed by addressing register \Register{\$arS}
          to mid accumulator register \Register{\$acD.m}. Decrement addressing register \Register{\$arS}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m = MEM[$arS]
    $arS--
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ILRRI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001d} & \monobitbox{4}{0001} & \monobitbox{4}{10ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ILRRI $acD.m, @$S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from instruction memory pointed by addressing register \Register{\$arS} to
          mid accumulator register \Register{\$acD.m}. Increment addressing register \Register{\$arS}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m = MEM[$arS]
    $arS++
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ILRRN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001d} & \monobitbox{4}{0001} & \monobitbox{4}{11ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ILRRN $acD.m, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from instruction memory pointed by addressing register \Register{\$arS}
          to mid accumulator register \Register{\$acD.m}. Add corresponding indexing register
          \Register{\$ixS} to addressing register \Register{\$arS}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m = MEM[$arS]
    $arS += $ixS
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{INC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{011d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    INC $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Increments accumulator \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD++
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{INCM}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{010d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    INCM $acsD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Increments 24-bit mid-accumulator \Register{\$acsD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acsD++
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{JMP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1001} & \monobitbox{4}{1111} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    JMP addressA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Jumps to \Address{addressA}. Set program counter to the address represented by the
          value that follows this \Opcode{JMP} instruction.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $pc = addressA
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{Jcc}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1001} & \monobitbox{4}{cccc} \\
    \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa} & \monobitbox{4}{aaaa}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    Jcc addressA
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Jumps to \Address{addressA} if condition \Flag{cc} has been met. Set program counter to the
          address represented by the value that follows this \Opcode{Jcc} instruction.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    IF (cc)
        $pc = addressA
    ELSE
        $pc += 2
    ENDIF
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{JMPR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0111} & \monobitbox{4}{rrr0} & \monobitbox{4}{1111}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    JMPR $R
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Jump to address; set program counter to a value from register \Register{\$R}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $pc = $R
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LOOP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{010r} & \monobitbox{4}{rrrr}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LOOP $R
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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
          beginning of loop then the looped instruction will not get executed.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    counter = $R
    WHILE (counter--)
        EXECUTE_OPCODE($pc + 1)
    END
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LOOPI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0000} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LOOPI #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Repeatedly execute the following opcode until the counter specified by immediate value \Value{I} reaches zero.
          Each execution decrements the counter. If immediate \Value{I} is set to zero at the
          beginning of loop then the looped instruction will not get executed.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    counter = I
    WHILE (counter--)
        EXECUTE_OPCODE($pc + 1)
    END
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{110d} & \monobitbox{4}{dddd} \\
    \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LR $D, @M
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from data memory pointed by address \Address{M} to register \Register{\$D}.
          Perform an additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = MEM[M]
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{100d} & \monobitbox{4}{dddd} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRI $D, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Load immediate value \Value{I} to register \Register{\$D}.
          Perform and additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = I
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRIS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{1ddd} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRIS $(0x18+D), #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Load immediate value \Value{I} (8-bit sign-extended) to accumulator register \Register{\$(0x18+D)}.
          Perform an additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = I
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1000} & \monobitbox{4}{0ssd} & \monobitbox{4}{dddd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRR $D, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
          Perform an additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = MEM[$arS]
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRRD}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1000} & \monobitbox{4}{1ssd} & \monobitbox{4}{dddd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRRD $D, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
          Decrements register \Register{\$arS}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = MEM[$arS]
    $arS--
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRRI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1001} & \monobitbox{4}{0ssd} & \monobitbox{4}{dddd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRRI $D, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from data memory pointed by addressing register \Register{\$arS} to register \Register{\$D}.
          Increments register \Register{\$arS}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = MEM[$arS]
    $arS++
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRRN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1001} & \monobitbox{4}{1ssd} & \monobitbox{4}{dddd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRRN $D, @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = MEM[$arS]
    $arS += $ixS
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LRS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0010} & \monobitbox{4}{0ddd} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LRS $(0x18+D), @M
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from data memory pointed by address \Address{M} (8-bit sign-extended) to register \Register{\$(0x18+D)}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[M]
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LSL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{010r} & \monobitbox{4}{00ii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LSL $acR, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logically left shifts accumulator \Register{\$acR} by the amount specified by value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR <<= I
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LSL16}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{000r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LSL16 $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logically left shifts accumulator \Register{\$acR} by 16.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR <<= 16
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LSR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{010r} & \monobitbox{4}{01ii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LSR $acR, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logically right shifts accumulator \Register{\$acR} by the amount calculated by negating sign-extended bits 0--6.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR >>= I
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{LSR16}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{010r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    LSR16 $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logically right shifts accumulator \Register{\$acR} by 16.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR >>= 16
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MADD}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{001s} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MADD $axS.l, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply low part \Register{\$axS.l} of secondary accumulator \Register{\$axS} by high part \Register{\$axS.h} of secondary
          accumulator \Register{\$axS} (treat them both as signed) and add result to product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod += $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MADDC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1110} & \monobitbox{4}{10st} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MADDC $acS.l, $axT.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply middle part of accumulator \Register{\$acS.m} by high part of secondary accumulator
          \Register{\$axT.h} (treat them both as signed) and add result to product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod += $acS.l * $axT.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MADDX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1110} & \monobitbox{4}{00st} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MADDX $(0x18+S*2), $(0x19+T*2)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply one part of secondary accumulator \Register{\$ax0} (selected by \Value{S}) by one part of
          secondary accumulator \Register{\$ax1} (selected by \Value{T}) (treat them both as signed) and add result to product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod += $(0x18+S*2) * $(0x19+T*2)
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MOV}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0110} & \monobitbox{4}{110d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOV $acD, $ac(1-D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves accumulator \Register{\$ax(1-D)} to accumulator \Register{\$axD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD = $ax(1-D)
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MOVAX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0110} & \monobitbox{4}{10sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOVAX $acD, $axS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves secondary accumulator \Register{\$axS} to accumulator \Register{\$axD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD = $axS
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MOVNP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOVNP $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves negated multiply product from the \Register{\$prod} register to the accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD = -$prod
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MOVP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0110} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOVP $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves multiply product from the \Register{\$prod} register to the accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD = $prod
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MOVPZ}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOVPZ $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves multiply product from the \Register{\$prod} register to the accumulator \Register{\$acD} and sets \Register{\$acD.l} to 0.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.hm = $prod.hm
    $acD.l = 0
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MOVR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0110} & \monobitbox{4}{0ssd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MOVR $acD, $(0x18+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Moves register \Register{\$(0x18+S)} (sign-extended) to middle accumulator \Register{\$acD.hm}. Sets \Register{\$acD.l} to 0.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.hm = $(0x18+S)
    $acD.l = 0
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MRR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{11dd} & \monobitbox{4}{ddds} & \monobitbox{4}{ssss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MRR $D, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value from register \Register{\$S} to register \Register{\$D}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $D = $S
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{MSUB}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1111} & \monobitbox{4}{011s} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MSUB $axS.l, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply low part \Register{\$axS.l} of secondary accumulator \Register{\$axS} by high part \Register{\$axS.h}
          of secondary accumulator \Register{\$axS} (treat them both as signed) and
          subtract result from product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod -= $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MSUBC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1110} & \monobitbox{4}{11st} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MSUBC $acS.m, $axT.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply middle part of accumulator \Register{\$acS.m} by high part of secondary accumulator
          \Register{\$axT.h} (treat them both as signed) and subtract result from product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod -= $acS.m * $axT.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MSUBX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1110} & \monobitbox{4}{01st} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MSUBX $(0x18+S*2), $(0x19+T*2)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply one part of secondary accumulator \Register{\$ax0} (selected by \Value{S}) by one part of secondary accumulator
          \Register{\$ax1} (selected by \Value{T}) (treat them both as signed) and subtract result from product register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod -= $(0x18+S*2) * $(0x19+T*2)
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MUL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1001} & \monobitbox{4}{s000} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MUL $axS.l, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply low part \Register{\$axS.l} of secondary accumulator \Register{\$axS} by high part \Register{\$axS.h}
          of secondary accumulator \Register{\$axS} (treat them both as signed).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod = $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULAC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1001} & \monobitbox{4}{s10r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULAC $axS.l, $axS.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Add product register to accumulator register \Register{\$acR}. Multiply low part \Register{\$axS.l} of
          secondary accumulator \Register{\$axS} by high part \Register{\$axS.h} of secondary accumulator
          \Register{\$axS} (treat them both as signed).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR += $prod
    $prod = $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{110s} & \monobitbox{4}{t000} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULC $acS.m, $axT.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply mid part of accumulator register \Register{\$acS.m} by high part \Register{\$axS.h}
          of secondary accumulator \Register{\$axS} (treat them both as signed).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod = $acS.m * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULCAC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{110s} & \monobitbox{4}{t10r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULCAC $acS.m, $axT.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply mid part of accumulator register \Register{\$acS.m} by high part \Register{\$axS.h} of
          secondary accumulator \Register{\$axS} (treat them both as signed).
          Add product register before multiplication to accumulator \Register{\$acR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    temp = $prod
    $prod = $acS.m * $axS.h
    $acR += temp
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULCMV}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{110s} & \monobitbox{4}{t11r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULCMV $acS.m, $axT.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply mid part of accumulator register \Register{\$acS.m} by high part \Register{\$axS.h} of
          secondary accumulator \Register{\$axS} (treat them both as signed).
          Move product register before multiplication to accumulator \Register{\$acR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    temp = $prod
    $prod = $acS.m * $axS.h
    $acR = temp
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULCMVZ}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{110s} & \monobitbox{4}{t01r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULCMVZ $acS.m, $axT.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply mid part of accumulator register \Register{\$acS.m} by high part \Register{\$axS.h} of
          secondary accumulator \Register{\$axS} (treat them both as signed).
          Move product register before multiplication to accumulator \Register{\$acR}.
          Set low part of accumulator \Register{\$acR.l} to zero.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    temp = $prod
    $prod = $acS.m * $axS.h
    $acR.hm = temp.hm
    $acR.l = 0
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULMV}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1001} & \monobitbox{4}{s11r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULMV $axS.l, $axS.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move product register to accumulator register \Register{\$acR}.
          Multiply low part \Register{\$axS.l} of secondary accumulator Register{\$axS} by high part
          \Register{\$axS.h} of secondary accumulator \Register{\$axS} (treat them both as signed).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR = $prod
    $prod = $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULMVZ}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1001} & \monobitbox{4}{s01r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULMVZ $axS.l, $axS.h, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move product register to accumulator register \Register{\$acR} and clear low
          part of accumulator register \Register{\$acR.l}. Multiply low part \Register{\$axS.l} of
          secondary accumulator \Register{\$axS} by high part \Register{\$axS.h} of secondary accumulator
          \Register{\$axS} (treat them both as signed).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR.hm = $prod.hm
    $acR.l = 0
    $prod = $axS.l * $axS.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{101s} & \monobitbox{4}{t000} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULX $ax0.S, $ax1.T
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Multiply one part \Register{\$ax0} by one part \Register{\$ax1} (treat them both as signed).
          Part is selected by \Value{S} and \Value{T} bits. Zero selects low part, one selects high part.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $prod = (S == 0) ? $ax0.l : ax0.h * (T == 0) ? $ax1.l : $ax1.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULXAC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{101s} & \monobitbox{4}{t01r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULXAC $ax0.S, $ax1.T, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Add product register to accumulator register \Register{\$acR}.
          Multiply one part \Register{\$ax0} by one part \Register{\$ax1} (treat them both as signed).
          Part is selected by \Value{S} and \Value{T} bits.
          Zero selects low part, one selects high part.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR += $prod
    $prod = (S == 0) ? $ax0.l : ax0.h * (T == 0) ? $ax1.l : $ax1.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULXMV}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{101s} & \monobitbox{4}{t11r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULXMV $ax0.S, $ax1.T, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move product register to accumulator register \Register{\$acR}.
          Multiply one part \Register{\$ax0} by one part \Register{\$ax1} (treat them both as signed).
          Part is selected by \Value{S} and \Value{T} bits.
          Zero selects low part, one selects high part.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR = $prod
    $prod = (S == 0) ? $ax0.l : ax0.h * (T == 0) ? $ax1.l : $ax1.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{MULXMVZ}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{101s} & \monobitbox{4}{t01r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    MULXMVZ $ax0.S, $ax1.T, $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move product register to accumulator register \Register{\$acR} and
          clear low part of accumulator register \Register{\$acR.l}. Multiply one part \Register{\$ax0} by one
          part \Register{\$ax1} (treat them both as signed).
          Part is selected by \Value{S} and \Value{T} bits.
          Zero selects low part, one selects high part.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acR.hm = $prod.hm
    $acR.l = 0
    $prod = (S == 0) ? $ax0.l : ax0.h * (T == 0) ? $ax1.l : $ax1.h
    $pc++
  \end{DSPOpcodeOperation}

  \begin{DSPOpcodeSeeAlso}
    \item \RegisterField{\$sr.AM} bit affects multiply result.
  \end{DSPOpcodeSeeAlso}
\end{DSPOpcode}

\begin{DSPOpcode}{NEG}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0111} & \monobitbox{4}{110d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    NEG $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Negates accumulator \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD =- $acD
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{NOP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{0000}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    NOP
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item No operation.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{NX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1000} & \monobitbox{4}{-000} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    NX
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item No operation, but can be extended with extended opcode.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ORC}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0011} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ORC $acD.m, $ac(1-D).m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logic OR middle part of accumulator \Register{\$acD.m} with middle part of accumulator \Register{\$ax(1-D).m}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m |= $ac(1-D).m
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ORI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{0110} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ORI $acD.m, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logical OR of accumulator mid part \Register{\$acD.m} with immediate value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m |= #I
    FLAGS($acD)
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{ORR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0011} & \monobitbox{4}{10sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    ORR $acD.m, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logical OR middle part of accumulator \Register{\$acD.m} with high part of secondary accumulator \Register{\$axS.h}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m |= $axS.h
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{RET}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1101} & \monobitbox{4}{1111}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    RET
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Return from subroutine. Pops stored PC from call stack \Register{\$st0} and sets \Register{\$pc} to this location.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $pc = $st0
    POP_STACK($st0)
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{RETcc}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1101} & \monobitbox{4}{cccc}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    RETcc
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Return from subroutine if condition \Flag{cc} has been met.
          Pops stored PC from call stack \Register{\$st0} and sets \Register{\$pc} to this location.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    IF (cc)
        POP_STACK($st0)
    ELSE
        $pc += 2
    ENDIF
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{RTI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0010} & \monobitbox{4}{1111} & \monobitbox{4}{1111}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    RTI
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Return from exception. Pops stored status register \Register{\$sr} from data stack \Register{\$st1} and
          program counter PC from call stack \Register{\$st0} and sets \Register{\$pc} to this location.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $sr = $st1
    POP_STACK($st1)
    $pc = $st0
    POP_STACK($st0)
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SBSET}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0010} & \monobitbox{4}{0000} & \monobitbox{4}{0iii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SBSET #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Set bit of status register \Register{\$sr}. Bit number is calculated by adding 6 to immediate value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $sr |= (I + 6)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SBCLR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0011} & \monobitbox{4}{0000} & \monobitbox{4}{0iii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SBCLR #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Clear bit of status register \Register{\$sr}. Bit number is calculated by adding 6 to immediate value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $sr &= ~(I + 6)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{0110} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SI @M, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store 16-bit immediate value \Value{I} to a memory location pointed by address \Address{M} (\Address{M} is an 8-bit sign-extended value).
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[M] = I
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{0000} & \monobitbox{4}{111s} & \monobitbox{4}{ssss} \\
    \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SR @M, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value from register \Register{\$S} to a memory pointed by address \Address{M}.
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[M] = $S
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SRR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1010} & \monobitbox{4}{0dds} & \monobitbox{4}{ssss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SRR @$arD, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value from source register \Register{\$S} to a memory location pointed by addressing
          register \Register{\$arD}. Perform additional operation depending on source register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $S
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SRRD}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1010} & \monobitbox{4}{1dds} & \monobitbox{4}{ssss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SRRD @$arD, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value from source register \Register{\$S} to a memory location pointed by addressing
          register \Register{\$arD}. Decrement register \Register{\$arD}. Perform additional operation depending on source register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $S
    $arD--
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SRRI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1011} & \monobitbox{4}{0dds} & \monobitbox{4}{ssss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SRRI @$arD, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value from source register \Register{\$S} to a memory location pointed by addressing
          register \Register{\$arD}. Increment register \Register{\$arD}. Perform additional operation depending on source register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $S
    $arD++
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SRRN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0001} & \monobitbox{4}{1011} & \monobitbox{4}{1dds} & \monobitbox{4}{ssss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SRRN @$arD, $S
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Perform additional operation depending on source register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $S
    $arD += $ixD
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SRS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0010} & \monobitbox{4}{1sss} & \monobitbox{4}{mmmm} & \monobitbox{4}{mmmm}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SRS @M, $(0x18+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value from register \Register{\$(0x18+S)} to a memory pointed by address \Address{M} (8-bit sign-extended).
          Perform additional operation depending on destination register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[M] = $(0x18+S)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SUB}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0101} & \monobitbox{4}{110d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SUB $acD, $ac(1-D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Subtracts accumulator \Register{\$ac(1-D)} from accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD -= $ac(1-D)
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SUBAX}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0101} & \monobitbox{4}{10sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SUBAX $acD, $axS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Subtracts secondary accumulator \Register{\$axS} from accumulator register \Register{\$acD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD -= $axS
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SUBP}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0101} & \monobitbox{4}{111d} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SUBP $acD
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Subtracts product register from accumulator register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD -= $prod
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{SUBR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0101} & \monobitbox{4}{0ssd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    SUBR $acD, $(0x18+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Subtracts register \Register{\$(0x18+S)} from accumulator \Register{\$acD} register.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD -= $(0x18+S)
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{TST}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1011} & \monobitbox{4}{r001} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    TST $acR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Test accumulator \Register{\$acR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    FLAGS($acR)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{TSTAXH}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{1000} & \monobitbox{4}{011r} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    TSTAXH $axR.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Test hight part of secondary accumulator \Register{\$axR.h}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    FLAGS($axR.h)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{XORI}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0000} & \monobitbox{4}{001r} & \monobitbox{4}{0010} & \monobitbox{4}{0000} \\
    \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii} & \monobitbox{4}{iiii}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    XORI $acD.m, #I
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logical XOR (exclusive OR) of accumulator mid part \Register{\$acD.m} with immediate value \Value{I}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m ^= #I
    FLAGS($acD)
    $pc += 2
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{XORR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{0011} & \monobitbox{4}{00sd} & \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    XORR $acD.m, $axS.h
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Logical XOR (exclusive OR) middle part of accumulator \Register{\$acD.m} with high part of secondary accumulator \Register{\$axS.h}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $acD.m ^= $axS.h
    FLAGS($acD)
    $pc++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\section{Extended opcodes}

Extended opcodes do not exist on their own. These opcodes can only be attached to opcodes that
allow extending (8 lower bits of opcode not used by opcode). Extended opcodes do not modify the program counter (\Register{\$pc} register.

\pagebreak{}

\section{Alphabetical list of extended opcodes}

\pagebreak{}

\begin{DSPOpcode}{'DR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{0000} & \monobitbox{4}{01rr}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'DR $arR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Decrement addressing register \Register{\$arR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arR--
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'IR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{0000} & \monobitbox{4}{10rr}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'IR $arR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Increment addressing register \Register{\$arR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arR++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'L}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{01dd} & \monobitbox{4}{d0ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'L $(0x18+D), @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}.
          Post increment register \Register{\$arS}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$arS]
    $arS++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'LN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{01dd} & \monobitbox{4}{d1ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'LN $(0x18+D), @$arS
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Load register \Register{\$(0x18+D)} with value from memory pointed by register \Register{\$arS}.
          Add indexing register \Register{\$ixS} to register \Register{\$arS}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$arS]
    $arS += $ixS
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'LS}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{01dd} & \monobitbox{4}{d1ss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'LS $(0x18+D), $acS.m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Increment both \Register{\$ar0} and \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar0]
    MEM[$ar3] = $acS.m
    $ar0++
    $ar3++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'LSM}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{100s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'LSM $(0x18+D), $acS.m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar0]
    MEM[$ar3] = $acS.m
    $ar0++
    $ar3 += $ix3
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'LSNM}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{110s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'LSNM $(0x18+D), $acS.m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding
          indexing register \Register{\$ix3} to addressing register \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar0]
    MEM[$ar3] = $acS.m
    $ar0 += $ix0
    $ar3 += $ix3
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'LSN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{010s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'LSN $(0x18+D), $acS.m
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar0]
    MEM[$ar3] = $acS.m
    $ar0 += $ix0
    $ar3++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'MV}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{0001} & \monobitbox{4}{ddss}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'MV $(0x18+D), $(0x1c+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Move value of register \Register{\$(0x1c+S)} to the register \Register{\$(0x18+D)}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = $(0x1c+S)
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'NR}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{0000} & \monobitbox{4}{11rr}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'NR $arR
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Add corresponding indexing register \Register{\$ixR} to addressing register \Register{\$arR}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $arR += $ixR
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'S}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{001s} & \monobitbox{4}{s0dd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'S @$D, $(0x1c+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \item Store value of register \Register{\$(0x1c+S)} in the memory pointed by register \Register{\$arD}.
          Post increment register \Register{\$arD}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $(0x1c+S)
    $arD++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'SL}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{001s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'SL $acS.m, $(0x18+D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Increment both \Register{\$ar0} and \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar3]
    MEM[$ar0] = $acS.m
    $ar0++
    $ar3++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'SLM}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{101s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'SLM $acS.m, $(0x18+D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix3} to addressing register \Register{\$ar3} and increment \Register{\$ar0}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar3]
    MEM[$ar0] = $acS.m
    $ar0++
    $ar3 += $ix3
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'SLMN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{111s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'SLMN $acS.m, $(0x18+D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and add corresponding
          indexing register \Register{\$ix3} to addressing register \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar3]
    MEM[$ar0] = $acS.m
    $ar0 += $ix0
    $ar3 += $ix3
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'SLN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{10dd} & \monobitbox{4}{011s}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'SLN $acS.m, $(0x18+D)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
          Add corresponding indexing register \Register{\$ix0} to addressing register \Register{\$ar0} and increment \Register{\$ar3}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    $(0x18+D) = MEM[$ar3]
    MEM[$ar0] = $acS.m
    $ar0 += $ix0
    $ar3++
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\begin{DSPOpcode}{'SN}
  \begin{DSPOpcodeBytefield}{16}
    \monobitbox{4}{xxxx} & \monobitbox{4}{xxxx} & \monobitbox{4}{001s} & \monobitbox{4}{s1dd}
  \end{DSPOpcodeBytefield}

  \begin{DSPOpcodeFormat}
    'SN @$arD, $(0x1c+S)
  \end{DSPOpcodeFormat}

  \begin{DSPOpcodeDescription}
    \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}.
  \end{DSPOpcodeDescription}

  \begin{DSPOpcodeOperation}
    MEM[$arD] = $(0x1c+S)
    $arD += $ixD
  \end{DSPOpcodeOperation}
\end{DSPOpcode}

\section{Instructions sorted by opcode}


\newcolumntype{T}{>{\ttfamily}l}

\begin{center}
\begin{longtable}{TllT}
NOP         &          & *  & 0000 0000 0000 0000                     \\
DAR         &          & *  & 0000 0000 0000 01aa                     \\
IAR         &          & *  & 0000 0000 0000 10aa                     \\
XXX         & NOT USED &    & 0000 0000 0000 11xx                     \\
ADDARN      &          & *  & 0000 0000 0001 bbaa                     \\
HALT        &          & *  & 0000 0000 0010 0001                     \\
            &          &    &                                         \\
LOOP        &          & *  & 0000 0000 010r rrrr                     \\
BLOOP       &          & *  & 00000 0000 011r rrrr                    \\
            &          &    &                                         \\
LRI         &          & *  & 0000 0000 100r rrrr iiii iiii iiii iiii \\
XXX         & NOT USED & *  & 0000 0000 101x xxxx                     \\
LR          &          & *  & 0000 0000 110r rrrr mmmm mmmm mmmm mmmm \\
SR          &          & *  & 0000 0000 111r rrrr mmmm mmmm mmmm mmmm \\
            &          &    &                                         \\
IF cc       &          & *  & 0000 0010 0111 cccc                     \\
JMP cc      &          & *  & 0000 0010 1001 cccc                     \\
CALL cc     &          & *  & 0000 0010 1011 cccc                     \\
RET cc      &          & *  & 0000 0010 1101 cccc                     \\
            &          &    &                                         \\
ADDI        &          & *  & 0000 001r 0000 0000 iiii iiii iiii iiii \\
XORI        &          & *  & 0000 001r 0010 0000 iiii iiii iiii iiii \\
ANDI        &          & *  & 0000 001r 0100 0000 iiii iiii iiii iiii \\
ORI         &          & *  & 0000 001r 0110 0000 iiii iiii iiii iiii \\
CMPI        &          & *  & 0000 001r 1000 0000 iiii iiii iiii iiii \\
ANDCF       &          & *  & 0000 001r 1010 0000 iiii iiii iiii iiii \\
ANDF        &          & *  & 0000 001r 1100 0000 iiii iiii iiii iiii \\
            &          &    &                                         \\
ILRR        &          & *  & 0000 001r 0001 mmaa                     \\
            &          &    &                                         \\
ADDIS       &          & *  & 0000 010d iiii iiii                     \\
CMPIS       &          & *  & 0000 011d iiii iiii                     \\
LRIS        &          & *  & 0000 1rrr iiii iiii                     \\
            &          &    &                                         \\
LOOPI       &          & *  & 0001 0000 iiii iiii aaaa aaaa aaaa aaaa \\
BLOOPI      &          & *  & 0001 0001 iiii iiii aaaa aaaa aaaa aaaa \\
SBSET       &          & *  & 0001 0010 ???? ?iii                     \\
SBCLR       &          & *  & 0001 0011 ???? ?iii                     \\
LSL/LSR     &          & *  & 0001 010r 0sss ssss                     \\
ASL/ASR     &          & *  & 0001 010r 1sss ssss                     \\
SI          &          & *  & 0001 0110 iiii iiii mmmm mmmm mmmm mmmm \\
CALLR       &          & *  & 0001 0111 rrr1 1111                     \\
JMPR        &          & *  & 0001 0111 rrr0 1111                     \\
LRR(I|D|X)  &          & *  & 0001 100x xaar rrrr                     \\
SRR(I|D|X)  &          & *  & 0001 101x xaar rrrr                     \\
MRR         &          & *  & 0001 11dd ddds ssss                     \\
            &          &    &                                         \\
LRS         &          & *  & 0010 0rrr mmmm mmmm                     \\
SRS         &          & *  & 0010 1rrr mmmm mmmm                     \\
            &          &    &                                         \\
XORR        &          & *  & 0011 00sr xxxx xxxx                     \\
ANDR        &          & *  & 0011 01sr xxxx xxxx                     \\
ORR         &          & *  & 0011 10sr xxxx xxxx                     \\
ANDC        &          & *  & 0011 110r xxxx xxxx                     \\
ORC         &          & *  & 0011 111r xxxx xxxx                     \\
            &          &    &                                         \\
ADDR        &          & *  & 0100 0ssd xxxx xxxx                     \\
ADDAX       &          & *  & 0100 10sd xxxx xxxx                     \\
ADD         &          & *  & 0100 110d xxxx xxxx                     \\
ADDP        &          & *  & 0100 111d xxxx xxxx                     \\
            &          &    &                                         \\
SUBR        &          & *  & 0101 0ssd xxxx xxxx                     \\
SUBAX       &          & *  & 0101 10sd xxxx xxxx                     \\
SUB         &          & *  & 0101 110d xxxx xxxx                     \\
SUBP        &          & *  & 0101 111d xxxx xxxx                     \\
            &          &    &                                         \\
MOVR        &          & *  & 0110 0ssd xxxx xxxx                     \\
MOVAX       &          & *  & 0110 10sd xxxx xxxx                     \\
MOV         &          & *  & 0110 110d xxxx xxxx                     \\
MOVP        &          & *  & 0110 111d xxxx xxxx                     \\
            &          &    &                                         \\
ADDAXL      &          & *  & 0111 00sr xxxx xxxx                     \\
INCM        &          & *  & 0111 010r xxxx xxxx                     \\
INC         &          & *  & 0111 011r xxxx xxxx                     \\
DECM        &          & *  & 0111 100r xxxx xxxx                     \\
DEC         &          & *  & 0111 101r xxxx xxxx                     \\
NEG         &          & *  & 0111 110r xxxx xxxx                     \\
MOVNP       &          & *  & 0111 111r xxxx xxxx                     \\
            &          &    &                                         \\
NX          &          & *  & 1000 x000 xxxx xxxx                     \\
CLR         &          & *  & 1000 x001 xxxx xxxx                     \\
CMP         &          & *  & 1000 0010 xxxx xxxx                     \\
???         & UNUSED   & *  & 1000 0011 xxxx xxxx                     \\
CLRP        &          & *  & 1000 0100 xxxx xxxx                     \\
TSTAXH      &          & *  & 1000 011x xxxx xxxx                     \\
M0/M2       &          &    & 1000 101x xxxx xxxx                     \\
CLR15/SET15 &          &    & 1000 110x xxxx xxxx                     \\
SET40/16    &          &    & 1000 111x xxxx xxxx                     \\
            &          &    &                                         \\
MUL         &          & *  & 1001 a000 xxxx xxxx                     \\
ASR16       &          & *  & 1001 r001 xxxx xxxx                     \\
MULMVZ      &          & *  & 1001 a01r xxxx xxxx                     \\
MULAC       &          & *  & 1001 a10r xxxx xxxx                     \\
MULMV       &          & *  & 1001 a11r xxxx xxxx                     \\
            &          &    &                                         \\
MULX        &          & *  & 101b a000 xxxx xxxx                     \\
???         &          &    & 1010 r001 xxxx xxxx                     \\
MULXMVZ     &          & *  & 101b a01r xxxx xxxx                     \\
MULXAC      &          & *  & 101b a10r xxxx xxxx                     \\
MULXMV      &          & *  & 101b a11r xxxx xxxx                     \\
            &          &    &                                         \\
MULC        &          & *  & 110s a000 xxxx xxxx                     \\
CMP         &          & *  & 110x r001 xxxx xxxx                     \\
MULCMVZ     &          & *  & 110s a01r xxxx xxxx                     \\
MULCAC      &          & *  & 110s a10r xxxx xxxx                     \\
MULCMV      &          & *  & 110s a11r xxxx xxxx                     \\
            &          &    &                                         \\
MADDX       &          & ** & 1110 00st xxxx xxxx                     \\
MSUBX       &          & ** & 1110 01st xxxx xxxx                     \\
MADDC       &          & ** & 1110 10st xxxx xxxx                     \\
MSUBC       &          & ** & 1110 11st xxxx xxxx                     \\
            &          &    &                                         \\
LSL16       &          & *  & 1111 000r xxxx xxxx                     \\
MADD        &          & *  & 1111 001s xxxx xxxx                     \\
LSR16       &          & *  & 1111 010r xxxx xxxx                     \\
MSUB        &          & *  & 1111 011s xxxx xxxx                     \\
ADDPAXZ     &          & *  & 1111 10ar xxxx xxxx                     \\
CLRL        &          & *  & 1111 110r xxxx xxxx                     \\
MOVPZ       &          & *  & 1111 111r xxxx xxxx
\end{longtable}
\end{center}

\begin{center}
Extension Opcodes
\begin{longtable}{TllT}
[D|I|N]R    &          & *  & xxxx xxxx 0000 nnaa \\
MV          &          & *  & xxxx xxxx 0001 ddss \\
S[N]        &          & *  & xxxx xxxx 001r rnaa \\
L[N]        &          & *  & xxxx xxxx 01dd diss \\
LS[NM|M|N]  &          & *  & xxxx xxxx 10dd ba0r \\
SL          &          & *  & xxxx xxxx 10dd ba1r \\
LD[NM|M|N]  &          &    & xxxx xxxx 11mn barr \\
LD2[NM|M|N] &          &    & xxxx xxxx 11rm ba11
\end{longtable}
\end{center}

\end{document}
