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Freescale Semiconductor SC140 specifications Rule L.N.2, Rule L.N.3

Models: SC140

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Static Programming Rules

Rule L.N.2

A loop body n must be surrounded by the LOOPSTARTn and LOOPENDn assembly directives, and can only be nested inside a loop body having a smaller index.

Example 7-49. Nested Loops with Ordered Index

doen1 #count1 move.w #num,d1 move.l #mem_l,r1 move.w #offset,n0

loopstart1

label1	d1
inc	d1
dosetup0	label2
doen0	#count2
move.w	#num,d2
loopstart0		;not allowed
label2	d2
inc	d2
impyuu	d1,d2,d3
move.w	d3,(r1)+
loopend0

nop loopend1

Rule L.N.3

A DOENn/DOENSHn instruction having a different loop index and any LOOPEND directive cannot come between the DOENn/DOENSHn instruction and LOOPSTARTn directive of loop n.

Also, it is not allowed to place a DOENSH instruction with any index between the DOENn and its respective LOOPSTARTn directive, or a DOEN instruction with any index between the DOENSHn instruction and its respective LOOPSTARTn directive.

Example 7-50. Nested DOENn/DOENSHn Instructions

count2 equ 5
...	#count2,d6
move.w	#count2,d6
dosetup0 label2
doen0	d6	; not allowed
doen1	#2	; not allowed
loopstart0
doen1	#5	; allowed
doen1	#6	; allowed

loopstart1

SC140 DSP Core Reference Manual

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Freescale Semiconductor SC140 specifications Rule L.N.2, Rule L.N.3, Example 7-49. Nested Loops with Ordered Index

Contents

Reference Manual SC140 DSP CoreSC140 DSP Core Reference Manual Table of Contents SC140 DSP Core Reference Manual Control Registers SC140 DSP Core Reference Manual Program Control Instruction Set Accelerator Plug-In Programming Rules Appendix a SC140 DSP Core Instruction SetAppendix B StarCore RegistryXii List of Figures Xiv List of Tables Xvi SC140 DSP Core Reference Manual Xvii Xviii List of Examples SC140 DSP Core Reference Manual SC140 DSP Core Reference Manual Xxi Xxii About This Book Abbreviations used in this manual are listed below AbbreviationsAbbreviation Description ISR Revision Date Description Revision HistoryTarget Markets Chapter IntroductionArchitectural Differentiation Core Architecture Features Typical System-On-Chip Configuration SC140 platform Variable Length Execution Set Vles Software ModelSoC DSP expansion area System expansion areaCore Architecture Features Architecture Overview Chapter Core ArchitectureData Arithmetic Logic Unit Dalu Block Diagram of the SC140 CoreBit-Field Unit BFU Address Generation Unit AGUData Register File Multiply-Accumulate MAC UnitBit Mask Unit BMU Stack Pointer RegistersMemory Interface Program Sequencer Unit PseqEnhanced On-Chip Emulator EOnCE Instruction Set Accelerator Plug-in Isap InterfaceDalu Architecture DaluLimit EXT Dalu Programming ModelData Registers D0-D15 Write to Data Registers Read from Data RegistersOperand Type Dn.e Dn.h Dn.l Instruction Description Data Registers Access WidthDalu Arithmetic Instructions MAC Operand Type Data Width BitsDIV NEG Dalu Logical Instructions BFU Data Shifter/LimiterScaling Example ScalingLimiting Calculating the Ln BitScaling Mode Bits Defining the Ln bit Calculation Limiting with the Moves InstructionsLn Bit Calculation 10. Scaling and Limiting Interactions Scaling and Arithmetic Saturation Mode InteractionsSelected Special Six Other Dalu Instructions Mode Limiting ExampleDalu Arithmetic and Rounding Data Representation11. Saturation and Rounding Interactions Signed Fractional Data FormatsSigned Integer 12. Two’s Complement Word RepresentationsSigned Fractional Signed Integer Unsigned Integer Unsigned Multiplication MultiplicationDivision Unsigned ArithmeticUnsigned Comparison 13. Rounding Position in Relation to Scaling ModeScaling Mode High Portion Low Portion Rounding ModesConvergent Rounding No Scaling 2.6.2 Two’s Complement Rounding Two’s Complement Rounding No Scaling 14. Arithmetic Saturation Example Arithmetic Saturation ModeFractional Multi-Precision Arithmetic Multi-Precision Arithmetic SupportFractional Double-Precision Multiplication Fractional Mixed-Precision Multiplication Integer Multi-Precision Arithmetic10. Signed Integer Double-Precision Multiplication 11. Unsigned Integer Double-Precision Multiplication Viterbi Decoding SupportAGU Architecture Address Generation UnitAddress ArithmeticUnit AAU Address Generation Unit 13. AGU Programming Model AGU Programming ModelStack Pointer Registers NSP, ESP Address Registers R0-R15Shadow Stack Pointer Registers Offset Registers N0-N3Base Address Registers B0-B7 Modifier Registers M0-M3Modifier Control Register Mctl 17. Address Modifier AM BitsAddress Modifier Modes Addressing Modes Register Direct ModesAddress Register Indirect Modes Address Generation Unit PC Relative Mode Special Addressing Modes Memory Access Misalignment Memory Access Width20. Addressing Modes Summary Access Type Aligned AddressAddressing Modes Summary 19. Memory Address AlignmentAddress Register Indirect PC RelativeSpecial Address Modifier Modes Linear Addressing ModeReverse-carry Addressing Mode Modulo Addressing Mode15. Modulo Addressing Example Multiple Wrap-Around Modulo Addressing Mode 21. Modulo Register Values for Modulo Addressing ModeModifier Mj Address Calculation Arithmetic 23. AGU Arithmetic Instructions Arithmetic Instructions on Address RegistersBit Mask Instructions 24. AGU Bit Mask Instructions BMU Bit Mask Test and Set Semaphore Support InstructionLabel BMTSET.W #mask,R0 JT label Move InstructionsSemaphore Hardware Implementation Example of Normal Usage of the Semaphoring MechanismMOVE.W 25. AGU Move Instructions16. Integer Move Instructions 17. Fractional Move Instructions 18. Bit Allocation in MOVE.L D0.eD1.e Memory Interface1.1 SC140 Bus Structure 1 SC140 Endian Support20. Basic Connection between SC140 Core and Memory Memory OrganizationData Moves 26. Data Representation in MemoryRepresentation Type Value 22. Data Transfer in Big and Little Endian Modes Address Data Multi-Register MovesMulti-Register Transfer in Big and Little Endian Modes Instruction Word Transfers 25. Instruction Moves in Big and Little Endian Modes Memory Access Behavior in Big/Little Endian Modes Example MOVE.2F D0D1, R0 Example MOVE.L D0.ED1.E, A0Example MOVE.2L D0D1, R0 Example MOVE.F D0, R0Example VSL.2W D1D3, R0 + N0 Example VSL.4W D2D6D1D3, R0 + N0D6 = Example VSL.4F D2D6D1D3, R0 + N0Data = Example Push D0Example Push D0 Push D1 Example BMSET.W #$1234, A0Instruction Register Operands Big Little Endian 31. Control Instructions in Big and Little Endian ModesStatus Register SR Core Control RegistersName Description Settings Describes the various SR bitsStatus Register Description Exceptions I2-I0 Interrupt Mask Bits ReflectReserved Overflow Exception Enable BitDisable Interrupts Bit When this bit Exception Mode Bit SelectsRounding Mode Bit Selects the type Equation ModeS1-S0 Scaling Mode Bits Specify Scaling Mode BitName Description Settings Arithmetic Saturation Mode Selects Exception and Mode Register EMR Exception and Mode Register EMREMR Description Describes the EMR fieldsIllegal Execution Set Indicates whether an IlstExample 3-1. Clearing an EMR Bit PLL and Clock RegistersClearing EMR Bits Bmclr #$fffb,EMR.LDebugging System Emulation and Debug EOnCECascading Multiple SC140 EOnCE Modules in a SoC Jtag Interface Signal DescriptionsSignal Name Signal Description Overview of the Combined Jtag and EOnCE InterfaceJtag Instructions Jtag Scan PathsLoadgpr Select-DR Scan Path Select-IR Scan Path TAP Controller State Machine Jtag Scan PathsEnabling the EOnCE Module Activating the EOnCE Through the Jtag PortReading/Writing EOnCE Registers Through Jtag Debugrequest and Enableeonce CommandsReading and Writing EOnCE Registers Via Jtag EOnCE register read capture operation through Jtag EOnCE register write operation through JtagCore Interface EOnCE SignalsEOnCE Signals Jtag Signals Main Capabilities of the EOnCE ModuleDebug State EOnCE Dedicated InstructionsDebug Exception Executing an Instruction while in Debug StateSoftware Downloading Software Downloading EOnCE Events EOnCE Event TypesEvent type Occurs when Event type EOnCE ActionsEvent and Action Summary EOnCE Event and Action SummaryEOnCE Enabling and Power Considerations EOnCE Module Internal ArchitectureEOnCE Controller Address Control Decoder Logic Receive Register Command RegisterTransmit Register Update Signal from the TAP Controller Address Monitor and Control RegisterEvent Counter Event Counter Register Set Shows a block diagram of the event counterEvent Detection Unit EDU EventD Event0 Event1 Event2 Event5 Count event EE5..0Address Buses XDBxx Data BusesEEi Address Event Detection Channel EdcaEdca Register Set Edcd register set is shown below Data Event Detection Channel EdcdEvent External Event 6,7 Count Event EventDOptional External Event Detection Address Channels Event Selector ES10. Event Selector Register Set EE40 ES block diagram is shown in FigureTrace Unit Event0..Event5 External Event6, Event7 EventD Count eventEOnCE Module Internal Architecture Change of Flow and Interrupt Tracing Change of FlowTrace Buffer TB Off-Core Writing to the Trace Buffer Reading the Trace Buffer TbbuffTrace Unit Programming Model 11. Trace Buffer Register Set EOnCE Register Addressing12 displays the EOnCE register addressing offsets 12. EOnCE Register Addressing OffsetsOffset EDCA4REFA Real-Time Jtag Access Reading or Writing EOnCE Registers Using Core SoftwareReal-Time Data Transfer General EOnCE Register IssuesEOnCE Register Addressing 13 describes the ECR fields EOnCE Command Register ECRRead/Write Command Specifies EOnCE Controller RegistersEOnCE Status Register ESR 16 displays the bit configuration of the ESR14 describes the ESR fields 14. ESR DescriptionName Description Section DREE3 Name Description Reserved EOnCE Monitor and Control Register Emcr15 describes the Emcr fields 15. Emcr DescriptionDebugerst EOnCE Transmit Register Etrsmt EOnCE Receive Register ErcvDetecting Entry into Debug State EE SignalsEE Signals as Outputs Detection by the Event Detection ChannelsEE Signals Control Register Eectrl EE Signals as InputsEeddef 16. Eectrl DescriptionEE2DEF Length Control Bits Description Core Command Register CorecmdLength control bits are described in -17, below 17. Length Control BitsPC Breakpoint Detection Register Pcdetect PC of the Exception Execution Set PcexcpPC of the Next Execution Set Pcnext PC of Last Execution Set PclastEvent Counter Control Register Ecntctrl Event Counter RegistersReserved for Test Extended Mode of Operation Bit18 describes the Ecntctrl fields 18. Ecntctrl DescriptionEvent Counter Enable Used to Event Counter Value Register EcntvalEvents to be Counted Determines Extension Counter Value Register Ecntext EC Signals19 describes the EDCAiCTRL fields Event Detection Unit EDU Channels and RegistersAddress Event Detection Channel Edca Edca Control Registers EDCAiCTRLComparators Selection Used to Event Detection Channel EDCAiAccess Type Selection These bits Comparator B Condition SelectionComparator a Condition Selection Edca Mask Register EDCAiMASK Edca Reference Value Registers a and B EDCAiREFA, EDCAiREFB20. Edcdctrl Description Data Event Detection Channel EdcdEdcd Control Register Edcdctrl 20 describes the Edcdctrl fieldsAWS Access Width SelectionComparator Condition Selection Access Type Selection The ATS bitEdcd Mask Register Edcdmask Event Selector ES RegistersEvent Selector Control Register Eselctrl Edcd Reference Value Register Edcdref21. Eselctrl Description Eselctrl fields are described in TableEvent Selector Mask Debug State Register Eseldm 24 displays the bit configuration of EseldmEvent Selector Mask Debug Exception Register Eseldi Event Selector Mask Enable Trace Register EseletbEvent Selector Mask Disable Trace Register Eseldtb Trace Unit RegistersTrace Buffer Control Register Tbctrl Upon a trace event, trace the counter value Ecntval This mode is usefull only with the Tcount mode22. Allowed tracing mode combinations Trace modeTrace Buffer Extension Counter Trace Buffer Counter ModeTbctrl fields are described in the following table 23. Tbctrl DescriptionTrace Issue of Execution Sets Enable Trace Loops Mode Enables tracingTrace Buffer Enable Mode Enables Trace Mark Instruction ModeTrace Buffer Read Pointer Register Tbrd Trace Buffer Write Pointer Register TbwrTrace Buffer Register Tbbuff Trace Unit Registers Pipeline Chapter Program ControlIllustrates the five instruction pipeline stages Instruction Pipeline StagesPipeline Stage Description Pipeline ExamplePipeline Stages Overview Instruction Cycle OperationInstruction Pre-Fetch and Fetch Instruction DispatchAddress Generation Instruction Grouping ExecutionExample 5-1. Four SC140 Instructions in an Execution Set Instruction Grouping Methods Grouping TypesPrefix Grouping Serial GroupingTwo-Word Prefix Prefix TypesPrefix Instructions Conditional ExecutionOne-Word Low Register Prefix For examplePrefix Selection Algorithm Assembly Syntax MeaningLow Register Prefix Selection Algorithm Instruction Reordering Within an Execution Set Example 5-5. Set of 2 Two-word Instructions Requiring a NOP Example 5-4. Conditional Vles Having Two SubgroupsInstruction Timing Instruction Categories Timing Summary Sequential Instruction TimingCompare Shift Test Dalu Instruction TimingMove Instruction Timing Bit Mask Instruction TimingExample 5-6. Delayed Change-of-Flow and Its Delay Slot Change-Of-Flow Instruction TimingNon-Loop Change-of-Flow Instructions Loop Change-Of-Flow Instructions Direct, PC-Relative, and Conditional COFCOF Execution Cycles Delayed COFExample 5-7. Subroutine Call Timing Example 5-7 shows a case when a stall cycle is addedHighest cycle count of instructions grouped with Call Number of Cycles Needed by Change-of-Flow InstructionsMemory Access Timing Memory Access Examples Example 5-8. Parallel Execution of Two Move Instructions MOVE.LMemory Stall Conditions Implicit Push/Pop Memory TimingHardware Loops Loop Programming ModelLoop Start Address Registers SAn Loop Notation and Encoding Loop Counter Registers LCnStatus Register SR Loop Flag Bits Location Functionality Loop Initiation and ExecutionLpmarka and Lpmarkb Bits in Short and Long Loops Loop TypeLoop Iteration and Termination Loop NestingInstruction Operation Loop Control Instructions10 lists the loop instructions 10. Loop Control InstructionsExample 5-13. Long Loop Disassembly Example 5-12. Long LoopExample 5-14. Short Loop, Two Execution Sets Following is an example of a nested loop Example 5-15. Short Loop, One Execution SetExample 5-16. Nested Loop Stack Support Loop Timing1 SC140 Single Stack Memory Use Shows the stack structure 2 SC140 Dual Stack Memory UseEven Register De File Odd Register Do File Stack Support Instructions11. Stack Push/Pop Instructions 12. Even and Odd Registers14. Stack Move Instructions Addressing Mode DescriptionShadow Stack Pointer Registers 13. Stack Memory MapFast Return from Subroutines Working Modes Normal Working ModeException Working Mode Working Mode EXP bit Active SPDual-stack Rtos Typical Working Mode Usage ScenariosSingle-stack Rtos Working Mode TransitionsFrom Exception to Normal mode From Normal to Exception modeWorking Modes Processing States Processing State Change Instructions16. Processing State Change Instructions Processing State Transitions 10. Core State DiagramProcessing State Transitions Description Reset Processing StateExecution State 17. Processing State TransitionsWait Processing State 18. Exit Wait Processing State due to an Interrupt or NMI Stop Processing StateException Processing 11. Core-PIC Interface SC140Interrupt Vector Address Vector Base Address RegisterProgramming Exception Routine Addresses Return From Exception Instructions 19. Exception Vector Address TableException Address Priority Type Description Offset Highest Interrupt Priority Level Maskable InterruptsNon-Maskable Interrupts NMI Internal ExceptionsIllegal Exception Illegal InstructionIllegal Execution Set Debug Exception Exception Interface to the PipelineDalu Overflow Trap ExceptionExample 5-17. Basic Exception Timing Exception Mode ExecutionException Timing 20. Exception PipelineException Processing 12 provides a flow chart for Example 21. Pipeline Example Introduction Instruction Set Accelerator Plug-InSC140Core Isap SC140 Schematic ConnectionSingle Isap Data MemoryMultiple Isap Core to Multiple Isap Connection SchematicBinary Encoding Words Bits Isap Memory AccessIsap instructions and instruction encoding Isap Encoding FieldsExample 6-1. Isap memory access ISAP-core register transfersTo understand this, look at the following lines of code Example 6-3. ISAP-Core register transfers Immediate Data Transfer to Isap registersFollowing line of code Example 6-2. ISAP-Core register transfersVles that uses an implicit Isap ID string Core Assembly Syntax with an IsapIdentification of Isap instructions Working with One IsapWorking with Multiple ISAPs One Isap in a Single-Line VlesOne Isap in a Multi-Line Vles An Example of the Definition Flexibility of an Isap Multiple ISAPs in a Multi-Line VlesExample 6-5. Multiple Isap coding Example 6-7. Conditional Execution Example Example 6-6. Conditional Execution ExampleIsap Functions that Interact With the Core Programming RulesRules for implicit AGU instructions Grouping rules for explicit Isap instructionsD.2, D.3 Sequencing rules for T bit updateProgramming Rules Vles Grouping Semantics Vles Sequencing SemanticsVles Grouping Semantics SC140 Pipeline Exposure Programming Rule NotationGrouping Rules Register Read/Write Sequencing RulesRegister Aliasing Status Bit UpdatesInstruction Words MOVE-like InstructionsChange-Of-Flow Destinations Delayed COF InstructionsDelay Slot AGU Arithmetic InstructionsHardware Loop Detection Enabled LoopStatic Programming Rules Hardware LoopsRule G.G.3 General Grouping RulesRule G.G.1 Rule G.G.2Example 7-7 Duplicate Stack Pointer Destinations Rule G.G.4Example 7-5 Duplicate PC Destinations Example 7-6 Duplicate Address Pointer Register DestinationsExample 7-10 Duplicate Status Bit Destinations Rule G.G.4 ExceptionsExample 7-8 Duplicate Register Destinations Example 7-9 Duplicate SR/EMR Register DestinationsExample 7-15. Dalu Register Use Exceeds Four Times Prefix Grouping RulesRule G.G.5 Following rules only apply to prefix-grouped VlesRule G.P.1 Example 7-16 Vles Extension Words Exceed TwoExample 7-17 Two-Word Instructions Exceed Two Example 7-18. Vles Has Mutually Exclusive Instructions Rule G.P.3Rule G.P.4 Rule G.P.5Example 7-21. IFc Having Two Subgroups Rule G.P.6Rule G.P.7 Example 7-20. Data Source Use of Nn and Mn RegistersRule G.P.8 Rule G.P.9Example 7-24. Isap instructions in same IFc group AGU Rules Rule A.1Example 7-25. Mctl Write to R0-R7 Use Rule A.2 Rule A.3Example 7-26. Rn, Nn, Mn Write to AGU Use Rule A.4 Example 7-27. Rn or Nn Write to MOVE-like UseExample 7-28. LCn Write to MOVE-like Use Rule A.7 Delayed COF RulesExample 7-29. Nmid Update to EMR Read Example 7-30. Instructions in a Delay SlotRule D.3 Example 7-31. Instructions in a Rted Delay SlotExample RTE/D with SR Updates Rule D.2Rule D.6 Rule D.4Rule D.5 Rule D.5aRule T.1 Status Bit RulesRule D.8 Rule D.9Rule SR.2 Rule T.2.aRule T.2.b Rule T.2.cStatic Programming Rules Example 7-43. SR Write to SR Status Bit Use Example 7-44. SR Write to SR Status Bit Update Rule SR.3Rule SR.4 Example 7-45. Dovf Update to SR Read or Write Example 7-46. Dovf Update grouped with Move-like SR updatesRule SR.4a DI and EI DOENn and DOENSHn Loop Nesting RulesRule SR.7 Rule L.N.1Example 7-50. Nested DOENn/DOENSHn Instructions Rule L.N.2Rule L.N.3 Example 7-49. Nested Loops with Ordered IndexExample 7-53. Changing a loop type Example 7-52. Loopend between Doen and LoopendExample 7-54. Instructions at the End of Long Loops Loop LA RulesRule L.L.1 Rule L.L.2Example 7-56. Instructions in Short Loops Rule L.L.3Rule L.L.4 LA of a short loop cannot be at LA-1 of a long loopRule L.D.1 Loop Sequencing RulesRule L.L.5 Rule L.L.6Example 7-60. LCn Write at the Start of Short Loop n Rule L.D.3Rule L.D.5 Rule L.D.6Rule L.D.7 Rule L.D.8Rule L.D.9 Rule L.C.3 Loop COF RulesRule L.C.1 Rule L.C.2Rule L.C.5 Bc or Jc instruction is not allowed at LA-3 of a long loopExample 7-68. Bc/Jc at LA-3 of a Long Loop Example 7-69. Loop COF Destination in the Same Loop Rule L.C.7Example 7-71. Subroutine Call to End of Loops Rule L.C.9Rule L.C.10 Example 7-70. Loop COF at End of Nested Long LoopsRule L.G.3 General Looping RulesRule L.C.11 Rule L.C.12Rule A.2a Dynamic Programming RulesAGU Dynamic Rules Rule L.G.5Rule D.7 Memory Access RulesRule A.5 Rule A.6Rule L.N.6 RAS RulesLoop Rules Rule J.4Example 7-82. SR.2 Across a COF Boundary Example 7-83. A.2 from a Delay Slot to a COF DestinationRule Detection Across COF Boundaries Cycle-Based COF RulesVLES-Based COF Rules Rule SR.4b Example 7-85. EMR access at the start of an exceptionRule Detection Across Exception Boundaries Rule SR.2aExample 7-86. Mctl Write to R0-R7 Use Rule A.1aRule J.2 COF destination cannot be a delay slotProgramming Guidelines Rule J.1Rule J.5 Rules Not Detected Across COF BoundariesGood Programming Practices Source Code PracticesBinary Code Practices Lpmark Rules Lpmark Instruction TypeSoftware Development Practices Prefix Grouping Rules Static Programming RulesDynamic Programming Rules General Grouping RulesLoop LA Rules Loop Nesting RulesExample 7-93. Active LCn Write at the End of Long Loops Lpmark Rule L.L.2Lpmark Rule L.L.3 Lpmark Rule L.L.5Lpmark Rule L.D.6 Loop Sequencing RulesLpmark Rule L.L.6 Lpmark Rule L.D.2 + L.D.3Example 7-97. Active LCn Read at the Start of a Loop Loop COF RulesLpmark Rule L.C.2 COF instructions are not allowed at LPB of a long loopLpmark Rule L.C.3 + L.C.5 Example 7-98. COF Instructions at LPB of a Long LoopExample 7-99. Bc/Jc at the Start of a Loop Example 7-101. Subroutine Call to End of Loops Lpmark Rule L.C.9Lpmark Rule L.C.10 Example 7-100. Loop COF at End of Nested Long LoopsLpmark Programming Guidelines General Looping RulesRule Detection Across Exception Boundaries Example 7-104. COF Destination to Loop Delay Slots NOP DefinitionLpmark Rule L.C.1 Is encoded as Grouping ExamplesIs assembler mapped to the IFF prefix and encoded as Is assembler mapped to the IFT prefix and encoded asIs encoded ignoring the NOP subgroup as NOP Definition Appendix a SC140 DSP Core Instruction Set Conventions Table A-1. Instruction ConventionsConvention Definition Abbreviation Register Name Table A-2. Operations SyntaxTable A-3. Register Abbreviations Operator DescriptionBrackets as Isap indicators Brackets as address indicatorsTable A-4. Assembler Syntax Addressing Mode Definition Notation in Instruction Field Addressing Mode NotationTable A-5. Addressing Mode Notation for the EA Operand Table A-6. Addressing Mode Notation for the ea OperandData Representation in Memory for the Examples Encoding NotationDefinition for the field is Prefix Word Encoding Ccc Instruction Formats and OpcodesInstruction Fields AaaPrefix Words Cycles Type Example, 2-w prefix + 2 grouped instruction words, aaa =If true D0, D2, A0, if false D1, D3, A1 If true, all the setHigh data register is used for the op1 field E2 is set Last, or to last-1 ExampleFirst execution set of the loop High data register is used for the op3 field E3 is setDSP Core Instruction Set Instruction Sub-types Instruction TypesTable A-7. Dalu Arithmetic Instructions MAC Table A-8. Dalu Logical Instructions BFU Table A-9. AGU Arithmetic Instructions Table A-11. AGU Stack Support Instructions Table A-10. AGU Move InstructionsTable A-13. AGU Non-Loop Change-of-Flow Instructions Table A-12. AGU Bit-Mask Instructions BMUTable A-16. Prefix Instructions Table A-15. AGU Program Control InstructionsInst InstructionsInstruction Definition Layout ABS Instruction Single Source/Destination Data RegisterADC Dc,Dd ADCAdd Long With Carry Dalu Dc + Dd + C → DdRegister/Memory Address Before Dc,Dd Data Register PairsAdd d0,d1,d2 ADDAdd Dalu Operation Assembler SyntaxAdd d1,d0,d2 Da,Db Da,Da Data Register Pairs#u5 ADD2 Add Two 16-Bit Values DaluAdd2 d0,d1 Single Source Data Register JJJAdda #s16,rx,Rn AddaAdd AGU Adda #u5,RxAddress Register Adda r0,r1Rrrr AGU Source Register AGU Source/Destination Register#s16 Rx1 + Rx → Rx ADDL1A Add With One-Bit Arithmetic Shift Left ADDL1ASource Operand AGU Addl1a r0,r1ADDL1A rx,Rx ADDL2A rx,Rx ADDL2A Add With Two-Bit Arithmetic Shift Left ADDL2AAddl2a r0,r1 Rx2 + Rx → RxADDL2A rx,Rx Addnc.w #$ca3e,d1,d2 ADDNC.WAdd Without Changing ADDNC.W Carry Bit DaluInstruction Words Cycles Type RndDa + Dn → Dn ADRAdd and Round Dalu Adr d3,d4ADR Da,Dn Da,Dn Bitwise and Dalu#0u16,Da,Dn #u16$0000,Da,DnD2,d1 #$0ff2e,d2,d1#$ff2e0000,d2,d1 #0u16 #u16$0000#u16 #u16,DR.L #$a70e,d1.h#u16 DR.L → DR.L #u16 DR.H → DR.HCycles Type Opcode Data/Address RegisterAND.W #u16,SP+s16 AND.W #u16,RnAND.W #u16,SP-u5 AND.W #u16,a16And.w #$54a1,r7 S16 A16ASL Da,Dn ASLAsl d0,d1 Da 1→ DnASL Da,Dn ASL2A Rx ASL2AAsl2a r0 Rx2 → RxAsla Rx AslaAsla r0 Rx1 → RxAsll Da,Dn AsllMultiple-Bit Arithmetic Shift Left Dalu Asll #u5,DnAsll d0,d1 Asll Da16 → Dn AslwWord Arithmetic Shift Left 16 Bits Dalu Aslw Aslw d0,d1Aslw Da,Dn ASR Da,Dn ASRAsr d5,d3 Da1 → DnRegister/Memory Address Before After Asra Asra r2Asra Rx Multiple-Bit Arithmetic Shift Right Dalu AsrrAsrr d3,d5 Asrr #$3,d5#u5 Asrw Da,Dn Asrw d5,d0Asrw Da,Dn BF label If T==0, then PC + displacement → PCBranch If False AGU BF lblInstruction Words Cycles1 Type Opcode Displacement labelBFD label BFD Branch If False Using a Delay Slot AGU OperationBFD BFD lblLabel Displacement ~DR.Hi → DR.Hi Bmchg~C1.Hi → C1.Hi i denotes bits=1 in #u16 ~C1.Li → C1.LiBmchg #$f0f0,d1.h Clears the Ln bit in the destination data registerControl Registers Iiiiiiiiiiiiiiii 16-bit unsigned immediate data Bit-Masked Change a BMCHG.WBMCHG.W #u16,SP-u5 Bmchg.w #$661f,$800cBit signed SP address offset Bmclr #u16,DR.H Bmclr Bit-Masked Clear a 16-Bit Operand BMU Bmclr OperationBmclr #u16,C1.H Bmclr #u16,C1.LBmclr #$b646,d7.l #u16 BMCLR.W Bit-Masked Clear aBit Operand in Memory BMU Operation Assembler Syntax BMCLR.W #u16,SP-u5 Bmset #u16,DR.L Bmset #u16,C1.HBmset #u16,C1.L Bmset #u16,DR.HBmset #$2436,d1.l Bit Operand in Memory BMU BMSET.WBmset.w #$f111,$800c Register/Memory Address Before Immediate$800C Bmtset #u16,DR.L BmtsetBmtset #$111f,d1.l Bmtset #u16,DR.HBmtset #$4238,d4.l Bit-Masked Test and Set a BMTSET.W BMTSET.WBmtset.w #$4328,$c BMTSET.W #u16,SP-u5 Bmtstc #$8a59,d7.h Bmtstc$0$0024A60000 $00E40000 BMTSTC.W #u16,Rn BMTSTC.WBMTSTC.W #u16,SP-u5 BMTSTC.W #u16,SP+s16Bmtstc.w #$8A59,r0 BMTSTC.W #u16,SP-u5 Bmtsts #u16,DR.L BmtstsBmtsts #u16,C1.L Bmtsts #u16,DR.HBmtsts #$24a6,d7.h BMTSTS.W #u16,Rn BMTSTS.WBMTSTS.W #u16,SP-u5 BMTSTS.W #u16,SP+s16Bmtsts.w #$0428,r0 BMTSTS.W #u16,SP-u5 BRA label PC + displacement → PCBRA Branch AGUAAAAAAAAAA0 Brad Brad labelSource Code Comments $0000 000A $0000 000E → LFn PC + displacement → PCBreak Break labelEncoding is the displacement with bit Bsr label BSRBranch to Subroutine AGU Status and Conditions Changed by Instruction None ExampleBSR PC + displacement → PC, next* PC→RAS Next* PC → SP SR → SP + 4 SP + 8 → SPBsrd label Bsrd label BT label If T==1, then PC + displacement → PCBranch If True AGU BT lblRegister/Memory Address Before BT After BTD label BTD Branch If True Using a Delay Slot AGU OperationBTD BTD lbl$0035 $0000 $0006 $002A $001A $0016 CLB Da,Dn CLBCount Leading Bits Dalu Clb d3,d7CLB Da,Dn → Dn CLRClear a Data Register Dalu Clr d1Source Data Register Destination Data RegisterIf Da == Dn, then 1→ T, else 0 → T CmpeqCompare for Equal Dalu Cmpeq d2,d3118 CMPEQ.W #u5,Dn CMPEQ.WCMPEQ.W Compare for Equal Dalu Cmpeq.w #$5,d3CMPEQ.W Cmpeqa rx,Rx Cmpeqa Compare for Equal AGU Cmpeqa OperationCmpeqa r1,r2 If rx == Rx, then 1 → T, else 0 → TCmpeqa rx,Rx Dn Da → T CmpgtCompare for Greater Than Dalu Cmpgt d2,d3124 CMPGT.W #s16,Dn CMPGT.WCmpgt.w #$8002,d2 CMPGT.W #u5,DnCMPGT.W #u5,Dn Rx rx → T CmpgtaCompare for Greater Than AGU Cmpgta Cmpgta r2,r3Cmpgta rx,Rx Cmphi Da,Dn CmphiUnsigned Compare for Higher Dalu Cmphi Cmphi d1,d0130 Cmphia rx,Rx CmphiaUnsigned Compare for Higher AGU Cmphia Cmphia r0,r1Cmphia rx,Rx Label ContContinue to the Next Loop Iteration AGU LabelCycles1 Type Opcode Contd label ContdCycles1 Type Enter Debug Mode AGU DebugDebug Debugev Signal a Debug Event AGU DebugevRx 1 → Rx DecaDecrement a Register AGU Deca r0Bit unsigned immediate data = 1, set by the assembler Deceq d7 Dn 1 → Dn if Dn==0, then 1→ T, else 0 → TDeceq Dn 142 Deceqa Rx Deceqa Decrement and Set T If Equal Zero DeceqaDeceqa r0 Rx 1 → Rx if Rx==0, then 1 → T, else 0 → T Deceqa RxDecge Dn DecgeExample decge Dn 1 → Dn Dn≥0 → TSC140 DSP Core Reference Manual 145 Decgea Rx DecgeaDecgea r4 Rx 1 → Rx Rx ≥ 0 → TDecgea Rx SR18 Determines execution working modeSR19 Set disable interrupt bit → DIPage Then 2 * Dn + C + Da & $FF Ffff 0000 → Dn DIVDivide Iteration Dalu If Dn39 ⊕ Da39 =Div d2,d1 DIV Da,Dn Dc signed, Dd signed DmacssDmacss d2,d3,d5 Dn16 + Dc.H * Dd.H → DnDmacss Dc,Dd,Dn 1 1 Dmacsu Multiply Signed By Unsigned and Dmacsu Accumulate With Right Shifted Data Register DaluDmacsu d2,d3,d5 156 DOENn #u16 Do Enable Long Loop AGUDoen2 d0 DOENn #u6#u6 Loop IdentifierDOENSHn #u16 Do Enable Short Loop AGU DOENSHnDoensh2 d0 DOENSHn #u6$00E4 $A0E4 DOSETUPn label Setup Long Loop DOSETUPnDosetup1 label PC + displacement → SAnEncoding is the displacement with → DI SR19 Clears disable interrupt bit164 Da ⊕ Dn → Dn EORBitwise Exclusive or Dalu Eor d4,d5EOR Da,Dn Eor #$5,d5.l EOR #u16,DR.LEOR #u16,DR.H EOR #u16,DR.L EOR #u16,DR.H Bitwise Exclusive or on EOR.WEor.w #$aaaa,r0 Extract #U6,#u6,Db,Dn ExtractExtract Extract Signed Bit Field Dalu Extract #$c,#$e,d2,d4Jjj Single Source/Destination Data Register Extractu #U6,#u6,Db,Dn ExtractuExtractu Extract Unsigned Bit Field Extractu #$c,#$e,d2,d4Extractu #U6,#u6,Da,Dn IADDNC.W #s16,Dn Iaddnc.w #$a002,d2Else treat as NOP Execute group/subgroup unconditionally Conditionally Execute a Group or Subgroup Prefix IFcIf T == Then execute group/subgroup Else treat as NOP If T == Then execute group/subgroupCcc Conditional execution of the entire execution set Ift move.w #$ffff,d0Illegal Illegal Imac ±Da,Db,Dn ImacImac d4,d5,d6 Dn ± Da.L * Db.L → DnAccumulation Notation Imac -d4,d5,d6182 Imaclhuu Da,Db,Dn Dn + Da.L * Db.H → DnImaclhuu Da,Db,Dn Imacus d3,d4,d0 ImacusInteger Multiply Accumulate Unsigned By Signed Dalu Operation Assembler Syntax$0002 x -64 $FFC0 -128 $FF80 +0 $0000 -128 $FF80 Impy Da,Db,Dn ImpyInteger Multiply Dalu Da.L * Db.L → DnD1,D1 D3,D3 D5,D5 D7,D7 Impy.w #$fffe,d3 #s16 * Dn.L → DnIMPY.W #s16,Dn +16 Da.H * Db.L → Dn ImpyhluuInteger Multiply Upper Impyhluu Impyhluu d4,d3,d0Impyhluu Da,Db,Dn Register Bit Name Description Address ImpysuImpysu d3,d5,d1 Impysu Da,Db,DnImpysu Da,Db,Dn Impyuu Impyuu d5,d3,d1Impyuu Da,Db,Dn 196 INC Dn INCINC Increment a Data Register By One Dalu Operation Inc d0Inc d15 Inc.f d15 Dn + $0000010000 → DnINC.F Dn INC.F Dn Rx + 1 → Rx IncaIncrement Register AGU Inca r0Inca Rx Insert #U6,#u6,Db,Dn InsertInsert Bit Field Dalu Insert #12,#22,d6,d7Insert #U6,#u6,Db,Dn JF Rn Jump If False AGUJF lbl JF labelBit absolute long address JFD JFD labelJFD Rn $00E0 $00 0000 $0000 $00 0000 002A $00 0000 001A JMP label JMPJump AGU Jmp labelJMP label Jmpd label Jump Using a Delay Slot AGUJmpd Example jmpd lblAaaaaaaaaaaaaaaaAAAAAAAAAAAAAAAAA JSR label JSRJump to Subroutine AGU Jsr r6Absolute long address Jsrd Rn Example jsrd r6Next* PC → RAS Rn → PC Jsrd labelJsrd label JT Rn Jump If True AGUJt r0 JT labelJT label JTD label Jump If True Using Delay Slot AGUJTD Example jtd r0JTD label LCn 1 → LCn Else next PC → PC → LFn → SLF LPMARKx End-of-Loop Mark Prefix LPMARKx OperationIf LCn Then SAn → PC LCn 1 → LCn Else next PC → PC → LFn If LCn Then SAn → PCLCn Description Status and Conditions that Affect Lpmark ExecutionTable A-17. Combinations of LPMARKx Use LFnInstruction Disassembled Instruction Comments Status and Conditions Changed by Lpmark ExecutionPrefix Formats and Opcodes Insertion of lpmarkb by assemblerLsll Da,Dn LsllMultiple-Bit Bitwise Shift Left Dalu Lsll d4,d2$00E4 $0$FF 8765 Dn1 → Dn 0 → Dn39 LSRBitwise Shift Right One Bit Dalu Lsr d4Rx1 → Rx 0 → Rx31 LsraBitwise Shift Right By One Bit AGU Lsra r2Lsrr #u5,Dn LsrrMultiple-Bit Bitwise Shift Right Dalu Lsrr Da,DnBefore After Lsrr d4,d2Bit unsigned immediate data Lsrw Da,Dn LsrwWord Bitwise Shift Right Dalu Lsrw d4,d2Lsrw Da,Dn MAC #s16,Da,Dn MACSigned Fractional Multiply-Accumulate Dalu Mac d4,d5,d6Mac #$1000,d5,d6 SC140 DSP Core Reference Manual 235 Macr ±Da,Db,Dn MacrMacr d4,d5,d6 RndDn ± Da.H * Db.H → Dn000 0000 0000 1000 $0008 Instruction Formats and Opcodes 238 Macsu Dc,Dd,Dn MacsuMacsu d0,d1,d4 Dn + Dc.H * Dd.L → Dn111 1111 1111 1111 $FFFF Instruction Formats and Opcodes Macus Dn + Dc.L * Dd.H → DnMacus Dc,Dd,Dn Macus Dc,Dd,Dn Macuu d2,d3,d1 MacuuFractional Multiply-Accumulate Unsigned By Unsigned Dalu Operation Assembler SyntaxMacuu Dc,Dd,Dn Mark Push the PC into the Trace Buffer AGU MarkPC → trace buffer If Dg Dh, then Dg → Dh MAXTransfer Maximum Signed Value Dalu Max d0,d4If Dg.L Dh.L, then Dg.L → Dh.L MAX2Max2 d0,d4 If Dg.H Dh.H, then Dg.H → Dh.H00 D0,D4 01 D1,D5 10 D2,D6 11 D3,D7 248 MAX2VIT Da,Db MAX2VITIf Da.L Db.L, then 0 → VFn, Da.L → Db.L Else 1 → VFnMax2vit d4,d2 Maxm Transfer Maximum Absolute Value Dalu Maxm Operation Maxm d2,d6Maxm Dg,Dh 00 D0,D4 01 D1,D5 10 D2,D6 11 D3,D7 252 MIN Dg,Dh MINTransfer Minimum Signed Value Dalu Min d1,d5Description MOVE.2FMove Two Fractional Words from MOVE.2F Memory to a Register Pair AGUMOVE.2F EA,DaDb DaDb Data Register PairsMOVE.2L DaDb,EA MOVE.2L EA,DaDb MOVE.2LMove.2l d0d1,r0 Da,Db ↔ EARead/Write Notation MOVE.2W EA,DaDb MOVE.2W DaDb,EA MOVE.2WMove.2w d0d1,r0 EA ↔ DaDb$FF Ffff AF44 EA → DaDbDcDd MOVE.4FMove Four Fractional Words from MOVE.4F Memory to a Register Quad AGUDaDbDcDd Data Register Quad Move.4f r0,d0d1d2d3MOVE.4W EA ↔ DaDbDcDdMOVE.4W EA,DaDbDcDd MOVE.4W DaDbDcDd,EA Move.4w d0d1d2d3,r0 Byte Move AGU MOVE.BMOVE.B DR,SP+s15 Move.b d3,r7+$3MOVE.B DR,ea MOVE.B SP+s15,DRMOVE.B a16,DR S15 A32MOVE.F Move Fractional WordTo/from Memory AGU Operation Assembler Syntax Move.f $54,d10 MOVE.F SP+s15,DbMOVE.F Db,ea MOVE.F #s16,Db MOVE.F a16,Db SC140 DSP Core Reference Manual 271 Move Long Word AGU MOVE.LGeneral Registers Cccc#u32 #s32MOVE.L Da.EDb.E,SP+s15 MOVE.L SP+s15,De.EMOVE.L Da.EDb.E,a32 Move.l d0.ed1.e,$1224MOVE.L SP+s15,Do.E MOVE.L a32,De.EDa.EDb.E ff Data Register Extension Pair Data Register278 Move Long AGU MOVE.L Rn+s15,DR MOVE.L DR,Rn+s15 MOVE.L a32,DR MOVE.L DR,a32MOVE.L a16,C4 MOVE.L C4,a16 MOVE.L Rn+u3,DR MOVE.L DR,Rn+u3MOVE.L SP+s15,C4 MOVE.L C4,SP+s15 Move.l d0,r0MOVE.L EA,DR MOVE.L DR,EA Read/Write Notation Rrr Address RegisterUnsigned 3-bit offset MOVE.W #s16,SP-u5 MOVE.W #s7,DRMOVE.W #s16,C4 MOVE.W #s16,a16Move.w #$0050,r7 MOVE.W #s7,DR MOVE.W #s16,C4 Sa16 #s7MOVE.W a16,C4 MOVE.W C4,a16 MOVE.WMove Integer Word AGU MOVE.W a32,DR MOVE.W DR,a32MOVE.W Rn,C3 MOVE.W C3,Rn MOVE.W Rn+u3,DR MOVE.W DR,Rn+u3MOVE.W Rn+s15,DR MOVE.W DR,Rn+s15 MOVE.W Rn+Rr,DR MOVE.W DR,Rn+RrMove.w d1,r7+4 MOVE.W a32,DR MOVE.W DR,a32 Write Sss0 Movef Rq,Rn MOVEc Conditional Address Register Move AGU MOVEc OperationMovet r0,r1 Movet Rq,RnQqq Address Register MOVES.2F Move Two Fractional Words to MOVES.2F DaDb → EAMOVES.2F DaDb,EA $7FFF $7EAC Moves.4f d0d1d2d3,r0 DaDbDcDd → EAMOVES.4F DaDbDcDd,EA $7FFF Move Fractional Word to MOVES.FMoves.f d0,r0 MOVES.F Db,a16 304 Moves.l d0,r0 MOVES.LMove Long to Memory With Scaling and Saturation AGU OperationMOVES.L Db,EA MOVEU.B Move Unsigned Byte fromMemory AGU Operation Assembler Syntax Moveu.b $0053,d10 MOVEU.B a16,DR 310 MOVEU.L #u32,Db MOVEU.LMoveu.l #$fffffff8,d3 #u32 → Db31IIIIIIIIIIIIIIII16 MOVEU.W #u16,Db.H Moveu.w #$2345,d10.l#u16 → Db3116 #u16 → Db150Iiiiiiiiiiiiiiii Bit unsigned immediate data #u16MOVEU.W Move Unsigned Word fromMemory to a Register AGU Operation Moveu.w r7+2,d10 MOVEU.W a16,C4 318 MPY Da,Db,Dn MPYMpy d4,d5,d6 Da.H * Db.H → DnMpy d6,d6,d7 SC140 DSP Core Reference Manual 321 Mpyr Da,Db,Dn MpyrMpyr d4,d5,d6 RndDa.H * Db.H → DnRegister/Memory Address Before After L6D6 $0000324 Mpysu Dc,Dd,Dn MpysuMpysu d4,d5,d6 Dc.H * Dd.L → Dn326 Mpyus Dc.L * Dd.H → DnMpyus Dc,Dd,Dn 328 Mpyuu Dc,Dd,Dn MpyuuMpyuu d4,d5,d6 Dc.L * Dd.L → Dn330 NEG Dn NEGNegate Dalu Neg d3NEG Dn Nop NOPNo Operation Prefix No operation~Da → Dn NotBitwise Complement Dalu Not d4,d5SC140 DSP Core Reference Manual 335 Binary Inversion of a 16-Bit Operand BMU Not D0.L~DR.L → DR.L Not DR.L NOT.W Binary Inversion of a 16-Bit OperandMemory BMU Operation Assembler Syntax Not.w r1 Or Da,Dn Bitwise Inclusive or DaluExample or d3,d0 Da Dn → DnSC140 DSP Core Reference Manual 341 Or #u16,DR.L Or #$0f0a,d0.l#u16 DR.L → DR.L #u16 DR.H → DR.HOr #u16,DR.L Or #u16,DR.H OR.W #u16,a16 OR.W #u16,RnOR.W #u16,SP-u5 OR.W #u16,SP+s16OR.W #u16,Rn Or.w #$f01a,r1346 POP Do SP 8 → De SP 8 → SPSP 4 → Do SP 8 → SP POP DePop d3 Extension Pairs, Even Registers, and Loop Start Registers EeeeeNSP 4 → Do NSP 8 → ΝSP NSP 8 → De NSP 8 → ΝSPPopn d6.ed7.e Popn DePopn Do 352 Push Do De → SP SP + 8 → SPDo → SP + 4 SP + 8 → SP Push DePush d0.ed1.e SC140 DSP Core Reference Manual 355 Pushn Do De → NSP NSP + 8 → ΝSPDo → NSP + 4 NSP + 8 → ΝSP Pushn DePushn d0.ed1.e Pushn De Pushn Do RND Da,Dn RNDRound Dalu RndDa → DnRnd d2,d1 Rnd d1,d5RND Da,Dn ROL Dn Rol d5Dn3801 → Dn391 Dn39 → C → Dn0ROL Dn ROR Dn Ror d15Dn39-11 → Dn38-0 → Dn39 Dn0 → CROR Dn RTE SP 8 → PCSP 4 → SR SP 8 → SP → Nmid Instruction Words Cycles1 Type RteRted Trap Example rtedIf RAS valid, then RAS → PC RTSReturn From Subroutine AGU RtsRTS Rtsd RtsdRtsd Register Address Bit Name Description EMR3 Restore PC from Stack AGURtstk ClearedExample rtstk Rtstkd SP 8 → PCSP 8 → SP Example rtstkd SAT.F Da,Dn SAT.FSat.f d2,d3 If Da $007FFFFFFF then $007FFF0000 → DnSAT.F Da,Dn SAT.L Sat.l d6SAT.L Dn SC140 DSP Core Reference Manual 381 SBC Dc,Dd SBCSubtract With Borrow Dalu Db Dc C → DdSBC Dc,Dd RndDn Da → Dn SBRSubtract And Round Dalu Sbr d3,d00010 1010 1110 0111 0000 0000 1000$2AE7 Skipls label If LCn ≤ Then PC + displacement → PC Skipls label → LFnSkipls Skipls labelSkipls label Stop Stop Stop Instruction Processing AGU OperationEnter the stop processing state SUB #u5,Dn SUBSubtract Dalu Sub d1,d0,d2Sub d0,d1,d2 SC140 DSP Core Reference Manual 391 SUB2 Subtract Two 16-Bit Values DaluSub2 d0,d1 SUB2 Da,Dn Suba #u5,Rx SubaSubtract AGU Suba r1,r0Suba Dn Da → Dn SublShift Left and Subtract Dalu Subl d0,d1$0$FF Ffff Fffe SUBNC.W #s16,Dn SUBNC.WSubnc.w #$15,d0 Dn #s16 → DnSUBNC.W #s16,Dn Sign-Extension Dalu Sxt.b d3,d0Sxt.w d3,d2 Sxt.l d3 Sign-Extension AGU Sxta.b r3,r1Sxta.w r3 SXTA.B Tfr d7,d6 TFRTransfer Data Register to Data Register Dalu Tfr d15,d14TFR Da,Dn Tfra rx,Rx TfraTfra r0,r1 Rx → RxSC140 DSP Core Reference Manual 407 Else Rn → ESP To/from a Register AGUIf Srexp = Then NSP → Rn Else ESP → Rn If Srexp = Then Rn → NSPTfra r0,osp Tfrt Da, Dn Tfrt d14,d15If T=1, then Da → Dn If T=0, then Da → DnTfrt TRAPn Trap Execute a Software Exception AGU Trap OperationTrap If Dn == 0, then 1 → T, else 0 → T TsteqTest for Equal to Zero Dalu Tsteq d1TSTEQA.W Rx TSTEQA.x Test for Equal to Zero AGU TSTEQA.x OperationTsteqa.w r4 Tsteqa.l r1TSTEQA.W TSTEQA.L If Dn = 0, then 1 → T, else 0 → T TstgeTest for Greater Than Or Equal to Zero Dalu Tstge d4Tstgea.l r7 If Rx ≥ 0, then 1 → T, else 0 → TTESTGEA.L Rx TSTGEA.L Rx Tstgt Dn Tstgt Test for Greater Than Zero Dalu Tstgt OperationTstgt d6 If Dn 0, then 1 → T, else 0 → ΤTstgta Rx Tstgta Test for Greater Than Zero AGU Tstgta OperationTstgta r2 If Rx 0, then 1 → T, else 0 → ΤViterbi Shift Left Move AGU Word Big Endian ModeLittle Endian Mode VSLVSL.2F D1D3,Rn+N0 VSL.4W D2D6D1D3,Rn+N0VSL.4F D2D6D1D3,Rn+N0 VSL.2W D1D3,Rn+N0Vsl.2w d1d3,r0+n0 After Little EndianAfter Big Endian VSL.4W Response Enters the low-power standby Wait processingWait StateWait Zero Extension Dalu Zxt.b d2,d5Zxt.w d3,d6 Zxt.l d0 Zero Extension AGU Zxta.b r3,n2Zxta.w r4 ZXTA.B ZXTA.x 432 Appendix B StarCore Registry Using the StarCore RegistryTable B-1. Scid Assignments Hex Bits Instruction Cores ExampleSet Version SoC / platform Index Ecnten Eeddef Eselctrl 4-26ESELDI 4-26ESELDM 4-26ESELDTB 4-26 Eseletb MOVES.F A-299 MOVES.L A-301 MOVEU.B A-307 Macsu A-239 Macus A-241 Macuu A-243 Mpysu A-325 Mpyus A-327 Mpyuu A-329 Rtstk A-374 Index Index SC140 DSP Core Reference Manual

Static Programming Rules

Rule L.N.2

Example 7-49. Nested Loops with Ordered Index

Rule L.N.3

Example 7-50. Nested DOENn/DOENSHn Instructions

doen1

loopstart0

; allowed

loopstart1