ANALOG DEVICES ADSP-219x Service Manual

ADSP-219x DSP

Instruction Set Reference

Analog Devices, Inc.
One Technology Way
Norwood, Mass. 02062-9106

Revision 2.0, December 2005

Part Number

82-000390-07

a

Copyright Information

© 2005 Analog Devices, Inc., ALL RIGHTS RESERVED. This docu­ment may not be reproduced in any form without prior, express written
consent from Analog Devices, Inc.

Printed in the USA.

Disclaimer

Analog Devices, Inc. reserves the right to change this product without
prior notice. Information furnished by Analog Devices is believed to be
accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use; nor for any infringement of patents or other rights of
third parties which may result from its use. No license is granted by impli­cation or otherwise under the patent rights of Analog Devices, Inc.

Trademark and Service Mark Notice

The Analog Devices logo, Blackfin, EZ-KIT Lite, SHARC, TigerSHARC,
and VisualDSP++ are registered trademarks of Analog Devices, Inc.

All other brand and product names are trademarks or service marks of
their respective owners.

CONTENTS

PREFACE

Purpose of This Manual ................................................................ xiii

Intended Audience ........................................................................ xiii

Manual Contents ........................................................................... xiv

What’s New in This Manual ............................................................ xv

Technical or Customer Support ....................................................... xv

Supported Processors ...................................................................... xvi

Product Information ..................................................................... xvii

MyAnalog.com ........................................................................ xvii

Processor Product Information ................................................ xviii

Related Documents .................................................................. xix

Online Technical Documentation ............................................. xix

Accessing Documentation From VisualDSP++ ....................... xx

Accessing Documentation From Windows ............................. xx

Accessing Documentation From the Web .............................. xxi

Printed Manuals ....................................................................... xxi

VisualDSP++ Documentation Set ........................................ xxii

Hardware Tools Manuals ..................................................... xxii

Processor Manuals ............................................................... xxii

ADSP-219x DSP Instruction Set Reference iii

CONTENTS

Data Sheets ........................................................................ xxii

Conventions ................................................................................ xxiii

INSTRUCTION SET SUMMARY

Core Registers Summary ............................................................... 1-2

Arithmetic Status (ASTAT) Register .............................................. 1-3

Condition Code (CCODE) Register ............................................. 1-5

Interrupt Control (ICNTL) Register ............................................. 1-6

Interrupt Mask (IMASK) Register and

Interrupt Latch (IRPTL) Register ............................................... 1-7

Mode Status (MSTAT) Register .................................................... 1-8

System Status (SSTAT) Register .................................................. 1-10

Condition Codes Summary ......................................................... 1-11

Instruction Summary .................................................................. 1-12

ALU Instructions .................................................................. 1-14

Multiplier Instructions .......................................................... 1-15

Shifter Instructions ............................................................... 1-16

Data Move Instructions ......................................................... 1-16

Program Flow Instructions .................................................... 1-18

Multifunction Instructions .................................................... 1-19

ALU INSTRUCTIONS

ALU Instruction Conventions ....................................................... 2-1

Input Registers ........................................................................ 2-1

Output Registers ..................................................................... 2-2

Constants ............................................................................... 2-2

iv ADSP-219x DSP Instruction Set Reference

CONTENTS

ALU Mode Control ................................................................. 2-3

ALU Status Flags ..................................................................... 2-4

ALU Instruction Reference ............................................................ 2-4

Add/Add with Carry ..................................................................... 2-5

Subtract X−Y/Subtract X−Y with Borrow ....................................... 2-9

Subtract Y−X/Subtract Y−X with Borrow ..................................... 2-13

Bitwise Logic: AND, OR, XOR ................................................... 2-16

Bit Manipulation: TSTBIT, SETBIT, CLRBIT, TGLBIT ............. 2-19

Clear: PASS ................................................................................ 2-22

Negate: NOT .............................................................................. 2-25

Absolute Value: ABS ................................................................... 2-28

Increment ................................................................................... 2-31

Decrement .................................................................................. 2-34

Divide Primitives: DIVS and DIVQ ............................................ 2-37

Generate ALU Status Only: NONE ............................................. 2-46

MAC INSTRUCTIONS

Multiply Instruction Conventions ................................................. 3-2

MAC Input Registers ............................................................... 3-2

MAC Output Registers ............................................................ 3-2

Data Format Options .............................................................. 3-3

Rounding Modes ..................................................................... 3-4

Numeric Format Modes ........................................................... 3-6

Status Flags ............................................................................. 3-7

Multiply ....................................................................................... 3-8

ADSP-219x DSP Instruction Set Reference v

CONTENTS

Multiply with Cumulative Add ................................................... 3-11

Multiply with Cumulative Subtract ............................................. 3-14

MAC Clear ................................................................................ 3-17

MAC Round/Transfer ................................................................. 3-19

MAC Saturate ............................................................................ 3-21

Generate MAC Status Only: NONE ........................................... 3-24

SHIFTER INSTRUCTIONS

Shifter Operation Conventions ..................................................... 4-2

Shifter Registers ...................................................................... 4-2

Shifter Instruction Options ..................................................... 4-3

Shifter Status Flags .................................................................. 4-5

Arithmetic Shift ............................................................................ 4-6

Arithmetic Shift Immediate .......................................................... 4-8

Logical Shift ............................................................................... 4-10

Logical Shift Immediate .............................................................. 4-12

Normalize .................................................................................. 4-14

Normalize Immediate ................................................................. 4-17

Exponent Derive ........................................................................ 4-20

Exponent (Block) Adjust ............................................................. 4-23

Denormalization ......................................................................... 4-26

MULTIFUNCTION INSTRUCTIONS

Order of Execution of Multifunction Operations ........................... 5-2

Multifunction Instruction Reference ............................................. 5-3

vi ADSP-219x DSP Instruction Set Reference

CONTENTS

Compute with Dual Memory Read ................................................ 5-4

Dual Memory Read ....................................................................... 5-8

Compute with Memory Read ...................................................... 5-11

Compute with Memory Write ..................................................... 5-15

Compute with Register-to-Register Move .................................... 5-19

DATA MOVE INSTRUCTIONS

Core Registers ............................................................................... 6-2

PX Register ................................................................................... 6-3

DAG Registers .............................................................................. 6-5

Address Registers ..................................................................... 6-5

DAG Memory Page Registers (DMPGx) .................................. 6-6

Secondary DAG Registers ........................................................ 6-7

Register Load Latencies ................................................................. 6-9

Data Addressing Methods ............................................................ 6-11

Direct Addressing .................................................................. 6-11

Indirect Addressing ................................................................ 6-12

Circular Data Buffer Addressing ............................................ 6-14

Bit-Reversed Addressing ........................................................ 6-16

Data Move Instruction Reference ................................................ 6-21

Register-to-Register Move ........................................................... 6-22

Direct Memory Read/Write—Immediate Address ........................ 6-24

Direct Register Load ................................................................... 6-27

Indirect 16-Bit Memory Read/Write—Postmodify ....................... 6-30

Indirect 16-Bit Memory Read/Write—Premodify ......................... 6-34

ADSP-219x DSP Instruction Set Reference vii

CONTENTS

Indirect 24-Bit Memory Read/Write—Postmodify ....................... 6-38

Indirect 24-Bit Memory Read/Write—Premodify ........................ 6-43

Indirect DAG Register Write (Premodify or Postmodify),

with DAG Register Move ......................................................... 6-47

Indirect Memory Read/Write—Immediate Postmodify ................ 6-51

Indirect Memory Read/Write—Immediate Premodify .................. 6-54

Indirect 16-Bit Memory Write—Immediate Data ........................ 6-57

Indirect 24-Bit Memory Write—Immediate Data ........................ 6-59

External I/O Port Read/Write ..................................................... 6-62

System Control Register Read/Write ........................................... 6-65

Modify Address Register—Indirect .............................................. 6-68

Modify Address Register—Direct ................................................ 6-70

PROGRAM FLOW INSTRUCTIONS

Conditions ................................................................................... 7-2

Counter-Based Conditions ............................................................ 7-2

CCODE Register ......................................................................... 7-3

Mode Control .............................................................................. 7-4

Branch Options ............................................................................ 7-4

Addressing Branch Targets ............................................................ 7-6

Stacks ........................................................................................... 7-7

PC and Status Stack Operation ................................................ 7-8

Loop Stacks Operation .......................................................... 7-10

Stack Status Flags ....................................................................... 7-12

Interrupts ................................................................................... 7-13

viii ADSP-219x DSP Instruction Set Reference

CONTENTS

Enabling Interrupts ............................................................... 7-14

Switching Contexts ................................................................ 7-16

Nesting Interrupts ................................................................. 7-16

Application Performance ............................................................. 7-17

Exiting a Loop ....................................................................... 7-18

Using Long Jumps and Calls .................................................. 7-20

Effect Latencies ..................................................................... 7-22

Program Flow Instruction Reference ............................................ 7-23

DO UNTIL (PC Relative) .......................................................... 7-24

Direct JUMP (PC Relative) ......................................................... 7-29

CALL (PC Relative) .................................................................... 7-33

JUMP (PC Relative) ................................................................... 7-37

Long Call (LCALL) ..................................................................... 7-40

Long Jump (LJUMP) .................................................................. 7-43

Indirect CALL ............................................................................ 7-46

Indirect JUMP ............................................................................ 7-50

Return from Interrupt (RTI) ....................................................... 7-53

Return from Subroutine (RTS) .................................................... 7-57

PUSH or POP Stacks .................................................................. 7-61

FLUSH CACHE ......................................................................... 7-67

Set Interrupt (SETINT) .............................................................. 7-69

Clear Interrupt (CLRINT) .......................................................... 7-71

NOP .......................................................................................... 7-73

IDLE .......................................................................................... 7-74

ADSP-219x DSP Instruction Set Reference ix

CONTENTS

Mode Control ............................................................................ 7-76

INSTRUCTION OPCODES

Opcode Mnemonics ..................................................................... 8-1

ALU or Multiplier Function (AMF) Codes .............................. 8-6

Condition Codes .................................................................... 8-8

Constant Codes ...................................................................... 8-9

Core Register Codes .............................................................. 8-11

Shift Function (SF) Codes ..................................................... 8-12

Index Register and Modify Register Codes ............................. 8-13

DMI, DMM, PMI, and PMM Codes .................................... 8-14

IREG/MREG Codes ............................................................. 8-15

XOP and YOP Codes ............................................................ 8-15

Opcode Definitions .................................................................... 8-16

Type 1: Compute | DregX«···DM | DregY«···PM ......................... 8-17

Type 3: Dreg/Ireg/Mreg «···» DM/PM ......................................... 8-18

Type 4: Compute | Dreg «···» DM ............................................... 8-19

Type 6: Dreg «··· Data16 ............................................................. 8-20

Type 7: Reg1/2 «··· Data16 ......................................................... 8-21

Type 8: Compute | Dreg1 «··· Dreg2 ........................................... 8-22

Type 9: Compute ........................................................................ 8-23

Type 9a: Compute ...................................................................... 8-26

Type 10: Direct Jump ................................................................. 8-28

Type 10a: Direct Jump/Call ........................................................ 8-29

Type 11: Do ··· Until .................................................................. 8-30

x ADSP-219x DSP Instruction Set Reference

CONTENTS

Type 12: Shift | Dreg «···» DM .................................................... 8-31

Type 14: Shift | Dreg1 «··· Dreg2 ................................................. 8-32

Type 15: Shift Data8 ................................................................... 8-33

Type 16: Shift Reg0 .................................................................... 8-34

Type 17: Any Reg «···Any Reg ..................................................... 8-35

Type 18: Mode Change ............................................................... 8-36

Type 19: Indirect Jump/Call ........................................................ 8-37

Type 20: Return .......................................................................... 8-38

Type 21: Modify DagI ................................................................. 8-39

Type 21a: Modify DagI ............................................................... 8-40

Type 22: DM «··· Data16 ............................................................ 8-41

Type 22a: PM «··· Data24 ............................................................ 8-42

Type 23: Divide primitive, DIVQ ................................................ 8-43

Type 24: Divide primitive, DIVS ................................................. 8-44

Type 25: Saturate ........................................................................ 8-45

Type 26:Push/Pop/Cache ............................................................ 8-46

Type 29: Dreg «···» DM .............................................................. 8-47

Type 30: NOP ............................................................................ 8-48

Type 31: Idle ............................................................................... 8-49

Type 32: Any Reg «···» PM/DM .................................................. 8-50

Type 32a: DM«···DAG Reg | DAG Reg«···Ireg ............................. 8-51

Type 33: Reg3 «··· Data12 ........................................................... 8-52

Type 34: Dreg «···» IOreg ............................................................ 8-53

Type 35: Dreg «···»Sreg ............................................................... 8-54

ADSP-219x DSP Instruction Set Reference xi

CONTENTS

Type 36: Long Jump/Call ........................................................... 8-55

Type 37: Interrupt ...................................................................... 8-56

INDEX

xii ADSP-219x DSP Instruction Set Reference

PREFACE

Thank you for purchasing and developing systems using ADSP-219x
DSPs from Analog Devices.

Purpose of This Manual

The ADSP-219x DSP Instruction Set Reference provides assembly syntax
information for ADSP-219x DSPs. The syntax descriptions cover instruc­tions that execute within the DSP’s processor core (processing elements,
program sequencer, and data address generators). For architecture and
design information on the DSP, see the ADSP-219x/2192 DSP Hardware
Reference.

Intended Audience

The primary audience for this manual is a programmer who is familiar
with Analog Devices processors. This manual assumes that the audience
has a working knowledge of the appropriate processor architecture and
instruction set. Programmers who are unfamiliar with Analog Devices
processors can use this manual, but should supplement it with other texts
(such as the appropriate hardware reference manuals and data sheets) that
describe your target architecture.

ADSP-219x DSP Instruction Set Reference xiii

Manual Contents

Manual Contents

This reference presents instruction information organized by the type of
the instruction. Instruction types relate to the machine language opcode
for the instruction. On this DSP, the opcodes categorize the instructions
by the portions of the DSP architecture that execute the instructions. The
following chapters cover the different types of instructions.

• “Instruction Set Summary” on page 1-1—This chapter provides a
syntax summary of all instructions and describes the conventions
that are used on the instruction reference pages.

• “ALU Instructions” on page 2-1—These instruction specify opera-
tions that occur in the DSP’s ALU.

• “MAC Instructions” on page 3-1—These instructions specify oper­ations that occur in the DSP’s Shifter.

• “Shifter Instructions” on page 4-1—These instructions specify
operations that occur in the DSP’s Shifter.

• “Multifunction Instructions” on page 5-1—These instructions
specify parallel, single-cycle operations.

• “Data Move Instructions” on page 6-1—These instructions specify
memory and register access operations.

• “Program Flow Instructions” on page 7-1—These instructions
specify program sequencer operations.

• “Instruction Opcodes” on page 8-1—This chapter lists the instruc­tion encoding fields for all instructions.

Each of the DSP’s instructions is specified in this text. The reference page
for an instruction shows the syntax of the instruction, describes its func­tion, gives one or two assembly-language examples, and identifies fields of

xiv ADSP-219x DSP Instruction Set Reference

Preface

its opcode. The instructions are referred to by type, ranging from 1 to 37.
These types correspond to the opcodes that ADSP-219x DSPs recognize,
but are for reference only and have no bearing on programming.

Some instructions have more than one syntactical form; for example, the
instruction “Type 9: Compute” on page 8-23 has many distinct forms.

Many instructions can be conditional. These instructions are prefaced by

IF COND; for example:

If COND compute;

In a conditional instruction, the execution of the entire instruction is
based on the specified condition.

What’s New in This Manual

Revision 2.0 of the ADSP-219x DSP Instruction Set Reference corrects all
known document errata issues.

L

This instruction set reference is a companion document to the
ADSP-219x/2192 DSP Hardware Reference (Rev 1.1, April 2004).

Technical or Customer Support

You can reach Analog Devices, Inc. Customer Support in the following
ways:

• Visit the Embedded Processing and DSP products Web site at

http://www.analog.com/processors/technicalSupport

• E-mail tools questions to

[e-mail]

ADSP-219x DSP Instruction Set Reference xv

Supported Processors

• E-mail processor questions to

[e-mail] (World wide support)
[e-mail] (Europe support)
[e-mail] (China support)

• Phone questions to 1-800-ANALOGD

• Contact your Analog Devices, Inc. local sales office or authorized
distributor

• Send questions by mail to:

Analog Devices, Inc.
One Technology Way
P.O. Box 9106
Norwood, MA 02062-9106
USA

Supported Processors

The following is the list of Analog Devices, Inc. processors supported in
VisualDSP++®.

TigerSHARC® (ADSP-TSxxx) Processors

The name TigerSHARC refers to a family of floating-point and fixed-point
[8-bit, 16-bit, and 32-bit] processors. VisualDSP++ currently supports the
following TigerSHARC families: ADSP-TS101 and ADSP-TS20x.

SHARC® (ADSP-21xxx) Processors

The name SHARC refers to a family of high-performance, 32-bit,
floating-point processors that can be used in speech, sound, graphics, and
imaging applications. VisualDSP++ currently supports the following
SHARC families: ADSP-2106x, ADSP-2116x, ADSP-2126x, and
ADSP-2136x.

xvi ADSP-219x DSP Instruction Set Reference

Blackfin® (ADSP-BFxxx) Processors

The name Blackfin refers to a family of 16-bit, embedded processors.
VisualDSP++ currently supports the following Blackfin families:
ADSP-BF53x and ADSP-BF56x.

ADSP-21xx Processors

The ADSP-21xx processors are high-performance 16-bit DSPs for com­munications, instrumentation, industrial/control, voice/speech, medical
and military applications. The family includes the ADSP-218x,
ADSP-219x, and mixed-signal products (ADSP-21990, ADSP-21991,
and ADSP-21992).

Product Information

You can obtain product information from the Analog Devices Web site,
from the product CD-ROM, or from the printed publications (manuals).

Preface

Analog Devices is online at www.analog.com. Our Web site provides infor­mation about a broad range of products—analog integrated circuits,
amplifiers, converters, and digital signal processors.

MyAnalog.com

MyAnalog.com is a free feature of the Analog Devices Web site that allows

customization of a Web page to display only the latest information on
products you are interested in. You can also choose to receive weekly
e-mail notifications containing updates to the Web pages that meet your
interests. MyAnalog.com provides access to books, application notes, data
sheets, code examples, and more.

ADSP-219x DSP Instruction Set Reference xvii

Product Information

Registration

Visit

www.myanalog.com to sign up. Click Register to use MyAnalog.com.

Registration takes about five minutes and serves as a means to select the
information you want to receive.

If you are already a registered user, just log on. Your user name is your
e-mail address.

Processor Product Information

For information on embedded processors and DSPs, visit our Web site at

www.analog.com/processors, which provides access to technical publica-

tions, data sheets, application notes, product overviews, and product
announcements.

You may also obtain additional information about Analog Devices and its
products in any of the following ways.

• E-mail questions or requests for information to

[e-mail] (World wide support)
[e-mail] (Europe support)
[e-mail] (China support)

• Fax questions or requests for information to

1-781-461-3010 (North America)
[phone] (Europe)

• Access the FTP Web site at

ftp ftp.analog.com (or ftp 137.71.25.69)
ftp://ftp.analog.com

xviii ADSP-219x DSP Instruction Set Reference

Preface

Related Documents

The following publications that describe the ADSP-219x processor can be
ordered from any Analog Devices sales office:

• ADSP-219x Processor Data Sheet

• ADSP-219x/2192 DSP Hardware Reference

For information on product related development software and Analog
Devices processors, see these publications:

• VisualDSP++ User’s Guide

• VisualDSP++ C/C++ Compiler and Library Manual

• VisualDSP++ Assembler and Preprocessor Manual

• VisualDSP++ Linker and Utilities Manual

• VisualDSP++ Kernel (VDK) User’s Guide

Visit the Technical Library Web site to access all processor and tools
manuals and data sheets:

http://www.analog.com/processors/technical_library

Online Technical Documentation

Online documentation comprises the VisualDSP++ Help system, software
tools manuals, hardware tools manuals, processor manuals, the Dinkum
Abridged C++ library, and Flexible License Manager (FlexLM) network
license manager software documentation. You can easily search across the
entire VisualDSP++ documentation set for any topic of interest. For easy
printing, supplementary .PDF files of most manuals are also provided.

ADSP-219x DSP Instruction Set Reference xix

Product Information

Each documentation file type is described as follows.

File Description

.CHM Help system files and manuals in Help format

.HTM or
.HTML

.PDF VisualDSP++ and processor manuals in Portable Documentation Format (PDF).

Dinkum Abridged C++ library and FlexLM network license manager software doc­umentation. Viewing and printing the
Internet Explorer 4.0 (or higher).

Viewing and printing the .PDF files requires a PDF reader, such as Adobe Acrobat
Reader (4.0 or higher).

.HTML files requires a browser, such as

If documentation is not installed on your system as part of the software
installation, you can add it from the VisualDSP++ CD-ROM at any time
by running the Tools installation. Access the online documentation from
the VisualDSP++ environment, Windows® Explorer, or the Analog
Devices Web site.

Accessing Documentation From VisualDSP++

From the VisualDSP++ environment:

• Access VisualDSP++ online Help from the Help menu’s Contents,
Search, and Index commands.

• Open online Help from context-sensitive user interface items (tool­bar buttons, menu commands, and windows).

Accessing Documentation From Windows

In addition to any shortcuts you may have constructed, there are many
ways to open VisualDSP++ online Help or the supplementary documenta­tion from Windows.

xx ADSP-219x DSP Instruction Set Reference

Preface

Help system files (.

CHM) are located in the Help folder, and .PDF files are

located in the Docs folder of your VisualDSP++ installation CD-ROM.
The Docs folder also contains the Dinkum Abridged C++ library and the
FlexLM network license manager software documentation.

Using Windows Explorer

• Double-click the vdsp-help.chm file, which is the master Help sys­tem, to access all the other .CHM files.

• Double-click any file that is part of the VisualDSP++ documenta­tion set.

Using the Windows Start Button

• Access VisualDSP++ online Help by clicking the Start button and
choosing Programs, Analog Devices, VisualDSP++, and
VisualDSP++ Documentation.

• Access the .PDF files by clicking the Start button and choosing

Programs, Analog Devices, VisualDSP++, Documentation for
Printing, and the name of the book.

Accessing Documentation From the Web

Download manuals at the following Web site:

http://www.analog.com/processors/technical_library

Select a processor family and book title. Download archive (.ZIP) files, one
for each manual. Use any archive management software, such as WinZip,
to decompress downloaded files.

Printed Manuals

For general questions regarding literature ordering, call the Literature
Center at 1-800-ANALOGD (1-800-262-5643) and follow the prompts.

ADSP-219x DSP Instruction Set Reference xxi

Product Information

VisualDSP++ Documentation Set

To purchase VisualDSP++ manuals, call 1-603-883-2430. The manuals
may be purchased only as a kit.

If you do not have an account with Analog Devices, you are referred to
Analog Devices distributors. For information on our distributors, log onto

http://www.analog.com/salesdir.

Hardware Tools Manuals

To purchase EZ-KIT Lite® and In-Circuit Emulator (ICE) manuals, call
1-603-883-2430. The manuals may be ordered by title or by product
number located on the back cover of each manual.

Processor Manuals

Hardware reference and instruction set reference manuals may be ordered
through the Literature Center at 1-800-ANALOGD (1-800-262-5643),
or downloaded from the Analog Devices Web site. Manuals may be
ordered by title or by product number located on the back cover of each
manual.

Data Sheets

All data sheets (preliminary and production) may be downloaded from the
Analog Devices Web site. Only production (final) data sheets (Rev. 0, A,
B, C, and so on) can be obtained from the Literature Center at
1-800-ANALOGD (1-800-262-5643); they also can be downloaded from
the Web site.

To have a data sheet faxed to you, call the Analog Devices Faxback System
at 1-800-446-6212. Follow the prompts and a list of data sheet code
numbers will be faxed to you. If the data sheet you want is not listed,
check for it on the Web site.

xxii ADSP-219x DSP Instruction Set Reference

Conventions

Text conventions used in this manual are identified and described as
follows.

Example Description

Preface

Close command
(File menu)

{this | that} Alternative items in syntax descriptions appear within curly brackets and

[this | that] Optional items in syntax descriptions appear within brackets and separated

[this,…] Optional item lists in syntax descriptions appear within brackets delimited

.SECTION Commands, directives, keywords, and feature names are in text with let-

filename Non-keyword placeholders appear in text with italic style format.

L
a

Titles in reference sections indicate the location of an item within the
VisualDSP++ environment’s menu system (for example, the Close com­mand appears on the File menu).

separated by vertical bars; read the example as this or that. One or the
other is required.

by vertical bars; read the example as an optional

by commas and terminated with an ellipse; read the example as an optional
comma-separated list of this.

ter gothic font.

Note: For correct operation, ...
A Note: provides supplementary information on a related topic. In the
online version of this book, the word Note appears instead of this symbol.

Caution: Incorrect device operation may result if ...
Caution: Device damage may result if ...

A Caution: identifies conditions or inappropriate usage of the product that
could lead to undesirable results or product damage. In the online version of
this book, the word Caution appears instead of this symbol.

this or that.

Warn in g: Injury to device users may result if ...

[

A Warning: identifies conditions or inappropriate usage of the product that
could lead to conditions that are potentially hazardous for devices users. In
the online version of this book, the word War ni ng appears instead of this
symbol.

ADSP-219x DSP Instruction Set Reference xxiii

Preface

L

Additional conventions, which apply only to specific chapters, may
appear throughout this document.

ADSP-219x DSP Instruction Set Reference xxiv

1 INSTRUCTION SET SUMMARY

This chapter provides a summary of the instructions in the ADSP-219x
DSP’s instruction set. Chapters 2 through 8 describe these instructions in
more detail as follows:

• “ALU Instructions” on page 2-1

• “MAC Instructions” on page 3-1

• “Shifter Instructions” on page 4-1

• “Multifunction Instructions” on page 5-1

• “Data Move Instructions” on page 6-1

• “Program Flow Instructions” on page 7-1

• “Instruction Opcodes” on page 8-1

Also, this chapter identifies mnemonics for using DSP registers, bits, and
operating conditions. This information appears in the following
summaries:

• “Core Registers Summary” on page 1-2

• “Arithmetic Status (ASTAT) Register” on page 1-3

• “Condition Code (CCODE) Register” on page 1-5

• “Interrupt Control (ICNTL) Register” on page 1-6

• “Interrupt Mask (IMASK) Register and Interrupt Latch (IRPTL)

Register” on page 1-7

ADSP-219x DSP Instruction Set Reference 1-1

Core Registers Summary

• “Mode Status (MSTAT) Register” on page 1-8

• “System Status (SSTAT) Register” on page 1-10

• “Condition Codes Summary” on page 1-11

For information on instruction reference notation, see “Conventions” on

page xxiii.

Core Registers Summary

The DSP has three categories of registers: core registers, system control
registers, and I/O registers. Table 1-1 lists and describes the DSP’s core
registers. For information about system control and I/O registers, see the
ADSP-219x/2192 DSP Hardware Reference.

Table 1-1. Core Registers

Type Registers Function

ALU data AX0, AX1, AY0, AY1,

AR, AF

Multiplier data MX0, MX1, MY0, MY1,

MR0, MR1, MR2

Shifter data SI, SE, SB, SR0, SR1, SR2

DAG address I0, I1, I2, I3

I4, I5, I6, I7

M0, M1, M2, M3
M4, M5, M6, M7

L0, L1, L2, L3
L4, L5, L6, L7

16-bit data registers (X and Y) provide input
for ALU, multiplier, and shifter operations.
AR and AF are ALU result and feedback regis­ters. MR and SR are multiplier result and feed­back registers. SR also is the shifter results
register.
In this text, Dreg denotes unrestricted use of
data registers as a data register file, while “
XOP” and “YOP” denote restricted use.
The data registers (except AF, SE, and SB) serve
as a register file for unconditional, single-func­tion instructions.

DAG1 index registers
DAG2 index registers

DAG1 modify registers
DAG2 modify registers

DAG1 length registers
DAG2 length registers

1-2 ADSP-219x DSP Instruction Set Reference

Table 1-1. Core Registers (Cont’d)

Type Registers Function

Instruction Set Summary

System control B0, B1, B2, B3, B4, B5,

B6, B7, SYSCTL, CACTL

Program flow CCODE

LPSTACKA
LPSTACKP
STACKA
STACKP

Interrupt ICNTL

IMASK
IRPTL

Status ASTAT

MSTAT
SSTAT (read-only)

Page DMPG1

DMPG2
IJPG
IOPG

Bus exchange PX Holds eight LSBs of 24-bit memory data for

Shifter SE

SB

DAG1 base address registers (B0-3), DAG2
base address registers (B4-7), System control,
and Cache control

Software condition register
Loop PC stack A register, 16 address LSBs
Loop PC stack P register, 8 address MSBs
PC stack A register, 16 address LSBs
PC stack P register, 8 address MSBs

Interrupt control register
Interrupt mask register
Interrupt latch register

Arithmetic status flags
Mode control and status flags
System status

DAG1 page register, 8 address MSBs
DAG2 page register, 8 address MSBs
Indirect jump page register, 8 address MSBs
I/O page register, 8 address MSBs

transfers between memory and data registers
only.

Shifter exponent register
Shifter block exponent register

Arithmetic Status (ASTAT) Register

The DSP updates the status bits in ASTAT, indicating the status of the
most recent ALU, multiplier, or shifter operation.

ADSP-219x DSP Instruction Set Reference 1-3

Arithmetic Status (ASTAT) Register

Table 1-2. ASTAT Register Bit Definitions

Bit Name Description

0 AZ ALU result zero. Logical NOR of all bits written to the ALU result register

(AR) or ALU feedback register (AF).
0 =ALU output ≠ 0
1 =ALU output = 0

1 AN ALU result negative. Sign of the value written to the ALU result register

(AR) or ALU feedback register (AF).
0 =ALU output positive (+)
1 =ALU output negative (−)

2 AV ALU result overflow.

0 =No overflow
1 =Overflow

3 AC ALU result carry.

0 =No carry
1 =Carry

4AS ALU x input sign. Sign bit of the ALU x-input operand; set by the ABS

instruction only.
0 =Positive (+)
1 =Negative (−)

5 AQ ALU quotient. Sign of the resulting quotient; set by the DIVS or DIVQ

instructions.
0 =Positive (+)
1 =Negative (−)

6 MV Multiplier overflow. Records overflow/underflow condition for MR result

register.
0 =No overflow or underflow
1 =Overflow or underflow

7 SS Shifter input sign. Sign of the shifter input operand.

0 =Positive (+)
1 =Negative (−)

8 SV Shifter overflow. Records overflow/underflow condition for SR result reg-

ister.
0 =No overflow or underflow
1 =Overflow or underflow

1-4 ADSP-219x DSP Instruction Set Reference

Instruction Set Summary

Condition Code (CCODE) Register

Using the CCODE register (shown in Table 1-3), conditional instructions
may base execution on a comparison of the CCODE value (user-selected) and
the SWCOND condition (DSP status). The CCODE register holds a value
between 0x0 and 0xF, which the instruction tests against when the condi­tional instruction uses SWCOND or NOT SWCOND. Note that the CCODE register
has a one-cycle effect latency.

Table 1-3. CCODE Register Bit Definitions

CCODE Software Condition

Value SWCOND (1010) NOT SWCOND (1011)

0x00 PF0 pin high PF0 pin low

0x01 PF1 pin high PF1 pin low

0x02 PF2 pin high PF2 pin low

0x03 PF3 pin high PF3 pin low

0x04 PF4 pin high PF4 pin low

0x05 PF5 pin high PF5 pin low

0x06 PF6 pin high PF6 pin low

0x07 PF7 pin high PF7 pin low

0x08 AS NOT AS

0x09 SV NOT SV

0x0A PF8 pin high PF8 pin low

0x0B PF9 pin high PF9 pin low

0x0C PF10 pin high PF10 pin low

0x0D PF11 pin high PF11 pin low

0x0E PF12 pin high PF12 pin low

0x0F PF13 pin high PF13 pin low

ADSP-219x DSP Instruction Set Reference 1-5

Interrupt Control (ICNTL) Register

Interrupt Control (ICNTL) Register

Refer to Table 1-4 for ICNTL register bit definitions.

Table 1-4. ICNTL Register Bit Definitions

Bit Name Description

0reserved write 0

1reserved write 0

2reserved write 0

3reserved write 0

4 INE Interrupt nesting enable.

0 =Disabled
1 =Enabled

5 GIE Global interrupt enable.

0 =Disabled
1 =Enabled

6reserved write 0

7 BIASRND MAC biased rounding mode.

0 =Disabled
1 =Enabled

8-9 reserved write 0

10 PCSTKE PC stack interrupt enable.

0 =Disabled
1 =Enabled

11 EMUCNTE Emulator cycle counter interrupt enable.

0 =Disabled
1 =Enabled

12-15 reserved write 0

1-6 ADSP-219x DSP Instruction Set Reference