Rule A.2, Rule A.3 | Freescale Semiconductor SC140 specification

Static Programming Rules

Rule A.2

At least one cycle is required between a MOVE-like instruction writing to an address register (Rn or Nn) as a data operand and when the same register is used in the following manner with the following instructions:

•An address operand of a MOVE-like instruction.

•A source operand of an AGU arithmetic instruction.

•An operand holding a target of a COF instruction 1.

This rule does not apply when a MOVE-like instruction writes Bn or Mn and used for modulo calculation on Rn, by either MOVE or an AGU arithmetic instruction is the instruction immediately following the MOVE-like instruction (even in the case that Bn is referred to as Rn+8)2. The rule does apply to writing to Rn (for n = 8÷15), using Bn-8 representation3.

Example 7-26. Rn, Nn, Mn Write to AGU Use

move.l	d0,r0	;not allowed
jmp	r0	;not allowed
move.l	d0,r0	;not allowed
move.w	(r0),d1	;not allowed
move.l	d0,b0	;not allowed (b0 is alias of r8)
move.w	(r8),d1	;not allowed (b0 is alias of r8)
move.l	d0,b0	;allowed - (but may contradict Rule A.2a due to r0 post inc)
move.w	(r0)+,d1
move.l	d0,r0	;not allowed
bmclr.w	#4,(r0)	;not allowed
move.l	d0,b0	;allowed - no Rn write
move.w	(r0),d1	;allowed - no Rn write
move.l	d0,b0	;not allowed
adda	r9,d0	;not allowed
move.l	d0,b3	;not allowed - (b3 is alias of r11)
adda	r11,d2	;not allowed - (b3 is alias of r11)
move.l	d0,m0	;allowed - no Rn write
move.w	(r0),d1	;allowed - no Rn write
move.l	d0,m1	;allowed (but may contradict Rule A.2a due to r0 post inc)
move.l	d1,(r0)+	;allowed (but may contradict Rule A.2a due to r0 post inc)
move.l	d0,n0	;not allowed
move.b	(r0+n0),d1	;not allowed

Rule A.3

A VLES having a JT/JF or BT/BF or TRAP instruction must be followed by another VLES. The last VLES in a program section cannot contain a JT/JF or TRAP instruction.

1.i.e. JMP Rn, JMPD Rn, JSR Rn, JSRD Rn, JT Rn, JTD Rn, JF Rn and JFD Rn, DOENn Rn or DOENSHn Rn

2.Writing to Bn and Mn is covered by dynamic rule A.2a.

3.B and R aliasing is applicable for other rule exceptions as well. See Chapter 7.4.3.2, “B Register Aliasing,” for more details.

SC140 DSP Core Reference Manual

7-17

Image 267

Freescale Semiconductor SC140 specifications Rule A.2, Rule A.3, Example 7-26. Rn, Nn, Mn Write to AGU Use

Contents

Reference Manual SC140 DSP Core SC140 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 Set Appendix B StarCore Registry Xii 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 History Target Markets Chapter Introduction Architectural Differentiation Core Architecture Features Typical System-On-Chip Configuration SC140 platform Variable Length Execution Set Vles Software ModelSoC DSP expansion area System expansion area Core Architecture Features Architecture Overview Chapter Core Architecture Data Arithmetic Logic Unit Dalu Block Diagram of the SC140 Core Bit-Field Unit BFU Address Generation Unit AGUData Register File Multiply-Accumulate MAC Unit Bit Mask Unit BMU Stack Pointer Registers Memory Interface Program Sequencer Unit PseqEnhanced On-Chip Emulator EOnCE Instruction Set Accelerator Plug-in Isap Interface Dalu Architecture Dalu Limit EXT Dalu Programming Model Data 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 Bits DIV NEG Dalu Logical Instructions BFU Data Shifter/Limiter Scaling Example ScalingLimiting Calculating the Ln Bit Scaling 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 Example Dalu Arithmetic and Rounding Data Representation11. Saturation and Rounding Interactions Signed Fractional Data Formats Signed Integer 12. Two’s Complement Word RepresentationsSigned Fractional Signed Integer Unsigned Integer Unsigned Multiplication MultiplicationDivision Unsigned Arithmetic Unsigned Comparison 13. Rounding Position in Relation to Scaling ModeScaling Mode High Portion Low Portion Rounding Modes Convergent Rounding No Scaling 2.6.2 Two’s Complement Rounding Two’s Complement Rounding No Scaling 14. Arithmetic Saturation Example Arithmetic Saturation Mode Fractional Multi-Precision Arithmetic Multi-Precision Arithmetic Support Fractional Double-Precision Multiplication Fractional Mixed-Precision Multiplication Integer Multi-Precision Arithmetic 10. Signed Integer Double-Precision Multiplication 11. Unsigned Integer Double-Precision Multiplication Viterbi Decoding Support AGU Architecture Address Generation Unit Address ArithmeticUnit AAU Address Generation Unit 13. AGU Programming Model AGU Programming Model Stack Pointer Registers NSP, ESP Address Registers R0-R15 Shadow Stack Pointer Registers Offset Registers N0-N3Base Address Registers B0-B7 Modifier Registers M0-M3 Modifier 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 Width 20. Addressing Modes Summary Access Type Aligned AddressAddressing Modes Summary 19. Memory Address Alignment Address Register Indirect PC RelativeSpecial Address Modifier Modes Linear Addressing ModeReverse-carry Addressing Mode Modulo Addressing Mode 15. 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 Registers Bit Mask Instructions 24. AGU Bit Mask Instructions BMU Bit Mask Test and Set Semaphore Support Instruction Label BMTSET.W #mask,R0 JT label Move InstructionsSemaphore Hardware Implementation Example of Normal Usage of the Semaphoring Mechanism MOVE.W 25. AGU Move Instructions 16. Integer Move Instructions 17. Fractional Move Instructions 18. Bit Allocation in MOVE.L D0.eD1.e Memory Interface 1.1 SC140 Bus Structure 1 SC140 Endian Support 20. Basic Connection between SC140 Core and Memory Memory Organization Data Moves 26. Data Representation in MemoryRepresentation Type Value 22. Data Transfer in Big and Little Endian Modes Address Data Multi-Register Moves Multi-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, R0 Example VSL.2W D1D3, R0 + N0 Example VSL.4W D2D6D1D3, R0 + N0D6 = Example VSL.4F D2D6D1D3, R0 + N0 Data = Example Push D0Example Push D0 Push D1 Example BMSET.W #$1234, A0 Instruction Register Operands Big Little Endian 31. Control Instructions in Big and Little Endian Modes Status Register SR Core Control Registers Name Description Settings Describes the various SR bitsStatus Register Description Exceptions I2-I0 Interrupt Mask Bits Reflect Reserved Overflow Exception Enable BitDisable Interrupts Bit When this bit Exception Mode Bit Selects Rounding Mode Bit Selects the type Equation ModeS1-S0 Scaling Mode Bits Specify Scaling Mode Bit Name Description Settings Arithmetic Saturation Mode Selects Exception and Mode Register EMR Exception and Mode Register EMR EMR Description Describes the EMR fields Illegal Execution Set Indicates whether an Ilst Example 3-1. Clearing an EMR Bit PLL and Clock RegistersClearing EMR Bits Bmclr #$fffb,EMR.L Debugging System Emulation and Debug EOnCE Cascading Multiple SC140 EOnCE Modules in a SoC Jtag Interface Signal DescriptionsSignal Name Signal Description Overview of the Combined Jtag and EOnCE Interface Jtag Instructions Jtag Scan Paths Loadgpr Select-DR Scan Path Select-IR Scan Path TAP Controller State Machine Jtag Scan Paths Enabling the EOnCE Module Activating the EOnCE Through the Jtag Port Reading/Writing EOnCE Registers Through Jtag Debugrequest and Enableeonce Commands Reading and Writing EOnCE Registers Via Jtag EOnCE register read capture operation through Jtag EOnCE register write operation through Jtag Core Interface EOnCE SignalsEOnCE Signals Jtag Signals Main Capabilities of the EOnCE Module Debug State EOnCE Dedicated Instructions Debug 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 Summary EOnCE 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 Register Event Counter Event Counter Register Set Shows a block diagram of the event counter Event Detection Unit EDU EventD Event0 Event1 Event2 Event5 Count event EE5..0Address Buses XDBxx Data Buses EEi Address Event Detection Channel Edca Edca Register Set Edcd register set is shown below Data Event Detection Channel EdcdEvent External Event 6,7 Count Event EventD Optional External Event Detection Address Channels Event Selector ES 10. Event Selector Register Set EE40 ES block diagram is shown in FigureTrace Unit Event0..Event5 External Event6, Event7 EventD Count event EOnCE 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 Addressing 12 displays the EOnCE register addressing offsets 12. EOnCE Register Addressing OffsetsOffset EDCA4REFA Real-Time Jtag Access Reading or Writing EOnCE Registers Using Core Software Real-Time Data Transfer General EOnCE Register Issues EOnCE Register Addressing 13 describes the ECR fields EOnCE Command Register ECRRead/Write Command Specifies EOnCE Controller Registers EOnCE Status Register ESR 16 displays the bit configuration of the ESR 14 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 Description Debugerst EOnCE Transmit Register Etrsmt EOnCE Receive Register Ercv Detecting Entry into Debug State EE SignalsEE Signals as Outputs Detection by the Event Detection Channels EE Signals Control Register Eectrl EE Signals as Inputs Eeddef 16. Eectrl Description EE2DEF Length Control Bits Description Core Command Register CorecmdLength control bits are described in -17, below 17. Length Control Bits PC Breakpoint Detection Register Pcdetect PC of the Exception Execution Set PcexcpPC of the Next Execution Set Pcnext PC of Last Execution Set Pclast Event Counter Control Register Ecntctrl Event Counter Registers Reserved for Test Extended Mode of Operation Bit18 describes the Ecntctrl fields 18. Ecntctrl Description Event Counter Enable Used to Event Counter Value Register EcntvalEvents to be Counted Determines Extension Counter Value Register Ecntext EC Signals 19 describes the EDCAiCTRL fields Event Detection Unit EDU Channels and RegistersAddress Event Detection Channel Edca Edca Control Registers EDCAiCTRL Comparators Selection Used to Event Detection Channel EDCAi Access Type Selection These bits Comparator B Condition SelectionComparator a Condition Selection Edca Mask Register EDCAiMASK Edca Reference Value Registers a and B EDCAiREFA, EDCAiREFB 20. Edcdctrl Description Data Event Detection Channel EdcdEdcd Control Register Edcdctrl 20 describes the Edcdctrl fields AWS Access Width Selection Comparator Condition Selection Access Type Selection The ATS bit Edcd Mask Register Edcdmask Event Selector ES RegistersEvent Selector Control Register Eselctrl Edcd Reference Value Register Edcdref 21. Eselctrl Description Eselctrl fields are described in Table Event Selector Mask Debug State Register Eseldm 24 displays the bit configuration of Eseldm Event Selector Mask Debug Exception Register Eseldi Event Selector Mask Enable Trace Register Eseletb Event 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 mode Trace Buffer Extension Counter Trace Buffer Counter ModeTbctrl fields are described in the following table 23. Tbctrl Description Trace Issue of Execution Sets Enable Trace Loops Mode Enables tracingTrace Buffer Enable Mode Enables Trace Mark Instruction Mode Trace Buffer Read Pointer Register Tbrd Trace Buffer Write Pointer Register TbwrTrace Buffer Register Tbbuff Trace Unit Registers Pipeline Chapter Program Control Illustrates the five instruction pipeline stages Instruction Pipeline Stages Pipeline Stage Description Pipeline ExamplePipeline Stages Overview Instruction Cycle Operation Instruction Pre-Fetch and Fetch Instruction DispatchAddress Generation Instruction Grouping ExecutionExample 5-1. Four SC140 Instructions in an Execution Set Instruction Grouping Methods Grouping Types Prefix Grouping Serial Grouping Two-Word Prefix Prefix Types Prefix Instructions Conditional ExecutionOne-Word Low Register Prefix For example Prefix Selection Algorithm Assembly Syntax Meaning Low 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 Subgroups Instruction Timing Instruction Categories Timing Summary Sequential Instruction Timing Compare Shift Test Dalu Instruction TimingMove Instruction Timing Bit Mask Instruction Timing Example 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 COF COF Execution Cycles Delayed COF Example 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 Instructions Memory Access Timing Memory Access Examples Example 5-8. Parallel Execution of Two Move Instructions MOVE.L Memory Stall Conditions Implicit Push/Pop Memory Timing Hardware 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 Type Loop Iteration and Termination Loop Nesting Instruction Operation Loop Control Instructions10 lists the loop instructions 10. Loop Control Instructions Example 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 Use Even Register De File Odd Register Do File Stack Support Instructions11. Stack Push/Pop Instructions 12. Even and Odd Registers 14. Stack Move Instructions Addressing Mode DescriptionShadow Stack Pointer Registers 13. Stack Memory Map Fast Return from Subroutines Working Modes Normal Working ModeException Working Mode Working Mode EXP bit Active SP Dual-stack Rtos Typical Working Mode Usage Scenarios Single-stack Rtos Working Mode TransitionsFrom Exception to Normal mode From Normal to Exception mode Working Modes Processing States Processing State Change Instructions16. Processing State Change Instructions Processing State Transitions 10. Core State Diagram Processing State Transitions Description Reset Processing StateExecution State 17. Processing State Transitions Wait Processing State 18. Exit Wait Processing State due to an Interrupt or NMI Stop Processing State Exception Processing 11. Core-PIC Interface SC140 Interrupt 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 Exceptions Illegal Exception Illegal InstructionIllegal Execution Set Debug Exception Exception Interface to the PipelineDalu Overflow Trap Exception Example 5-17. Basic Exception Timing Exception Mode ExecutionException Timing 20. Exception Pipeline Exception Processing 12 provides a flow chart for Example 21. Pipeline Example Introduction Instruction Set Accelerator Plug-In SC140Core Isap SC140 Schematic ConnectionSingle Isap Data Memory Multiple Isap Core to Multiple Isap Connection Schematic Binary Encoding Words Bits Isap Memory AccessIsap instructions and instruction encoding Isap Encoding Fields Example 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 transfers Vles that uses an implicit Isap ID string Core Assembly Syntax with an IsapIdentification of Isap instructions Working with One Isap Working 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 Example Isap Functions that Interact With the Core Programming Rules Rules for implicit AGU instructions Grouping rules for explicit Isap instructions D.2, D.3 Sequencing rules for T bit update Programming Rules Vles Grouping Semantics Vles Sequencing Semantics Vles Grouping Semantics SC140 Pipeline Exposure Programming Rule NotationGrouping Rules Register Read/Write Sequencing Rules Register Aliasing Status Bit UpdatesInstruction Words MOVE-like Instructions Change-Of-Flow Destinations Delayed COF InstructionsDelay Slot AGU Arithmetic Instructions Hardware Loop Detection Enabled LoopStatic Programming Rules Hardware Loops Rule G.G.3 General Grouping RulesRule G.G.1 Rule G.G.2 Example 7-7 Duplicate Stack Pointer Destinations Rule G.G.4Example 7-5 Duplicate PC Destinations Example 7-6 Duplicate Address Pointer Register Destinations Example 7-10 Duplicate Status Bit Destinations Rule G.G.4 ExceptionsExample 7-8 Duplicate Register Destinations Example 7-9 Duplicate SR/EMR Register Destinations Example 7-15. Dalu Register Use Exceeds Four Times Prefix Grouping RulesRule G.G.5 Following rules only apply to prefix-grouped Vles Rule 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.5 Example 7-21. IFc Having Two Subgroups Rule G.P.6Rule G.P.7 Example 7-20. Data Source Use of Nn and Mn Registers Rule 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 Slot Rule D.3 Example 7-31. Instructions in a Rted Delay SlotExample RTE/D with SR Updates Rule D.2 Rule D.6 Rule D.4Rule D.5 Rule D.5a Rule T.1 Status Bit RulesRule D.8 Rule D.9 Rule SR.2 Rule T.2.aRule T.2.b Rule T.2.c Static 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.1 Example 7-50. Nested DOENn/DOENSHn Instructions Rule L.N.2Rule L.N.3 Example 7-49. Nested Loops with Ordered Index Example 7-53. Changing a loop type Example 7-52. Loopend between Doen and Loopend Example 7-54. Instructions at the End of Long Loops Loop LA RulesRule L.L.1 Rule L.L.2 Example 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 loop Rule L.D.1 Loop Sequencing RulesRule L.L.5 Rule L.L.6 Example 7-60. LCn Write at the Start of Short Loop n Rule L.D.3Rule L.D.5 Rule L.D.6 Rule L.D.7 Rule L.D.8Rule L.D.9 Rule L.C.3 Loop COF RulesRule L.C.1 Rule L.C.2 Rule 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.7 Example 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 Loops Rule L.G.3 General Looping RulesRule L.C.11 Rule L.C.12 Rule A.2a Dynamic Programming RulesAGU Dynamic Rules Rule L.G.5 Rule D.7 Memory Access RulesRule A.5 Rule A.6 Rule L.N.6 RAS RulesLoop Rules Rule J.4 Example 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 Rules VLES-Based COF Rules Rule SR.4b Example 7-85. EMR access at the start of an exceptionRule Detection Across Exception Boundaries Rule SR.2a Example 7-86. Mctl Write to R0-R7 Use Rule A.1a Rule J.2 COF destination cannot be a delay slotProgramming Guidelines Rule J.1 Rule J.5 Rules Not Detected Across COF BoundariesGood Programming Practices Source Code Practices Binary Code Practices Lpmark Rules Lpmark Instruction TypeSoftware Development Practices Prefix Grouping Rules Static Programming RulesDynamic Programming Rules General Grouping Rules Loop LA Rules Loop Nesting Rules Example 7-93. Active LCn Write at the End of Long Loops Lpmark Rule L.L.2Lpmark Rule L.L.3 Lpmark Rule L.L.5 Lpmark Rule L.D.6 Loop Sequencing RulesLpmark Rule L.L.6 Lpmark Rule L.D.2 + L.D.3 Example 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 loop Lpmark 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 Loops Lpmark 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 Examples Is assembler mapped to the IFF prefix and encoded as Is assembler mapped to the IFT prefix and encoded as Is 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 Description Brackets 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 Operand Data Representation in Memory for the Examples Encoding NotationDefinition for the field is Prefix Word Encoding Ccc Instruction Formats and OpcodesInstruction Fields Aaa Prefix 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 set High 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 set DSP Core Instruction Set Instruction Sub-types Instruction Types Table 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 Instructions Table A-13. AGU Non-Loop Change-of-Flow Instructions Table A-12. AGU Bit-Mask Instructions BMU Table A-16. Prefix Instructions Table A-15. AGU Program Control Instructions Inst InstructionsInstruction Definition Layout ABS Instruction Single Source/Destination Data Register ADC Dc,Dd ADCAdd Long With Carry Dalu Dc + Dd + C → Dd Register/Memory Address Before Dc,Dd Data Register Pairs Add d0,d1,d2 ADDAdd Dalu Operation Assembler Syntax Add d1,d0,d2 Da,Db Da,Da Data Register Pairs#u5 ADD2 Add Two 16-Bit Values DaluAdd2 d0,d1 Single Source Data Register JJJ Adda #s16,rx,Rn AddaAdd AGU Adda #u5,Rx Address Register Adda r0,r1 Rrrr AGU Source Register AGU Source/Destination Register#s16 Rx1 + Rx → Rx ADDL1A Add With One-Bit Arithmetic Shift Left ADDL1ASource Operand AGU Addl1a r0,r1 ADDL1A rx,Rx ADDL2A rx,Rx ADDL2A Add With Two-Bit Arithmetic Shift Left ADDL2AAddl2a r0,r1 Rx2 + Rx → Rx ADDL2A rx,Rx Addnc.w #$ca3e,d1,d2 ADDNC.WAdd Without Changing ADDNC.W Carry Bit Dalu Instruction Words Cycles Type RndDa + Dn → Dn ADRAdd and Round Dalu Adr d3,d4 ADR Da,Dn Da,Dn Bitwise and Dalu#0u16,Da,Dn #u16$0000,Da,Dn D2,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.H Cycles Type Opcode Data/Address Register AND.W #u16,SP+s16 AND.W #u16,RnAND.W #u16,SP-u5 AND.W #u16,a16 And.w #$54a1,r7 S16 A16 ASL Da,Dn ASLAsl d0,d1 Da 1→ Dn ASL Da,Dn ASL2A Rx ASL2AAsl2a r0 Rx2 → Rx Asla Rx AslaAsla r0 Rx1 → Rx Asll Da,Dn AsllMultiple-Bit Arithmetic Shift Left Dalu Asll #u5,Dn Asll d0,d1 Asll Da16 → Dn AslwWord Arithmetic Shift Left 16 Bits Dalu Aslw Aslw d0,d1 Aslw Da,Dn ASR Da,Dn ASRAsr d5,d3 Da1 → Dn Register/Memory Address Before After Asra Asra r2Asra Rx Multiple-Bit Arithmetic Shift Right Dalu Asrr Asrr d3,d5 Asrr #$3,d5 #u5 Asrw Da,Dn Asrw d5,d0 Asrw Da,Dn BF label If T==0, then PC + displacement → PCBranch If False AGU BF lbl Instruction Words Cycles1 Type Opcode Displacement label BFD label BFD Branch If False Using a Delay Slot AGU OperationBFD BFD lbl Label Displacement ~DR.Hi → DR.Hi Bmchg~C1.Hi → C1.Hi i denotes bits=1 in #u16 ~C1.Li → C1.Li Bmchg #$f0f0,d1.h Clears the Ln bit in the destination data registerControl Registers Iiiiiiiiiiiiiiii 16-bit unsigned immediate data Bit-Masked Change a BMCHG.W BMCHG.W #u16,SP-u5 Bmchg.w #$661f,$800c Bit signed SP address offset Bmclr #u16,DR.H Bmclr Bit-Masked Clear a 16-Bit Operand BMU Bmclr OperationBmclr #u16,C1.H Bmclr #u16,C1.L Bmclr #$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.H Bmset #$2436,d1.l Bit Operand in Memory BMU BMSET.W Bmset.w #$f111,$800c Register/Memory Address Before Immediate$800C Bmtset #u16,DR.L BmtsetBmtset #$111f,d1.l Bmtset #u16,DR.H Bmtset #$4238,d4.l Bit-Masked Test and Set a BMTSET.W BMTSET.W Bmtset.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+s16 Bmtstc.w #$8A59,r0 BMTSTC.W #u16,SP-u5 Bmtsts #u16,DR.L BmtstsBmtsts #u16,C1.L Bmtsts #u16,DR.H Bmtsts #$24a6,d7.h BMTSTS.W #u16,Rn BMTSTS.WBMTSTS.W #u16,SP-u5 BMTSTS.W #u16,SP+s16 Bmtsts.w #$0428,r0 BMTSTS.W #u16,SP-u5 BRA label PC + displacement → PCBRA Branch AGU AAAAAAAAAA0 Brad Brad labelSource Code Comments $0000 000A $0000 000E → LFn PC + displacement → PCBreak Break label Encoding is the displacement with bit Bsr label BSRBranch to Subroutine AGU Status and Conditions Changed by Instruction None Example BSR 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 lbl Register/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,d7 CLB Da,Dn → Dn CLRClear a Data Register Dalu Clr d1 Source Data Register Destination Data Register If Da == Dn, then 1→ T, else 0 → T CmpeqCompare for Equal Dalu Cmpeq d2,d3 118 CMPEQ.W #u5,Dn CMPEQ.WCMPEQ.W Compare for Equal Dalu Cmpeq.w #$5,d3 CMPEQ.W Cmpeqa rx,Rx Cmpeqa Compare for Equal AGU Cmpeqa OperationCmpeqa r1,r2 If rx == Rx, then 1 → T, else 0 → T Cmpeqa rx,Rx Dn Da → T CmpgtCompare for Greater Than Dalu Cmpgt d2,d3 124 CMPGT.W #s16,Dn CMPGT.WCmpgt.w #$8002,d2 CMPGT.W #u5,Dn CMPGT.W #u5,Dn Rx rx → T CmpgtaCompare for Greater Than AGU Cmpgta Cmpgta r2,r3 Cmpgta rx,Rx Cmphi Da,Dn CmphiUnsigned Compare for Higher Dalu Cmphi Cmphi d1,d0 130 Cmphia rx,Rx CmphiaUnsigned Compare for Higher AGU Cmphia Cmphia r0,r1 Cmphia rx,Rx Label ContContinue to the Next Loop Iteration AGU Label Cycles1 Type Opcode Contd label Contd Cycles1 Type Enter Debug Mode AGU DebugDebug Debugev Signal a Debug Event AGU Debugev Rx 1 → Rx DecaDecrement a Register AGU Deca r0 Bit 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 Rx Decge Dn DecgeExample decge Dn 1 → Dn Dn≥0 → T SC140 DSP Core Reference Manual 145 Decgea Rx DecgeaDecgea r4 Rx 1 → Rx Rx ≥ 0 → T Decgea 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 → Dn Dmacss 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 Identifier DOENSHn #u16 Do Enable Short Loop AGU DOENSHnDoensh2 d0 DOENSHn #u6 $00E4 $A0E4 DOSETUPn label Setup Long Loop DOSETUPnDosetup1 label PC + displacement → SAn Encoding is the displacement with → DI SR19 Clears disable interrupt bit 164 Da ⊕ Dn → Dn EORBitwise Exclusive or Dalu Eor d4,d5 EOR Da,Dn Eor #$5,d5.l EOR #u16,DR.LEOR #u16,DR.H EOR #u16,DR.L EOR #u16,DR.H Bitwise Exclusive or on EOR.W Eor.w #$aaaa,r0 Extract #U6,#u6,Db,Dn ExtractExtract Extract Signed Bit Field Dalu Extract #$c,#$e,d2,d4 Jjj Single Source/Destination Data Register Extractu #U6,#u6,Db,Dn ExtractuExtractu Extract Unsigned Bit Field Extractu #$c,#$e,d2,d4 Extractu #U6,#u6,Da,Dn IADDNC.W #s16,Dn Iaddnc.w #$a002,d2 Else treat as NOP Execute group/subgroup unconditionally Conditionally Execute a Group or Subgroup Prefix IFcIf T == Then execute group/subgroup Else treat as NOP If T == Then execute group/subgroup Ccc Conditional execution of the entire execution set Ift move.w #$ffff,d0 Illegal Illegal Imac ±Da,Db,Dn ImacImac d4,d5,d6 Dn ± Da.L * Db.L → Dn Accumulation Notation Imac -d4,d5,d6 182 Imaclhuu Da,Db,Dn Dn + Da.L * Db.H → Dn Imaclhuu 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 $FF80 Impy Da,Db,Dn ImpyInteger Multiply Dalu Da.L * Db.L → Dn D1,D1 D3,D3 D5,D5 D7,D7 Impy.w #$fffe,d3 #s16 * Dn.L → DnIMPY.W #s16,Dn +16 Da.H * Db.L → Dn ImpyhluuInteger Multiply Upper Impyhluu Impyhluu d4,d3,d0 Impyhluu Da,Db,Dn Register Bit Name Description Address ImpysuImpysu d3,d5,d1 Impysu Da,Db,Dn Impysu Da,Db,Dn Impyuu Impyuu d5,d3,d1Impyuu Da,Db,Dn 196 INC Dn INCINC Increment a Data Register By One Dalu Operation Inc d0 Inc d15 Inc.f d15 Dn + $0000010000 → DnINC.F Dn INC.F Dn Rx + 1 → Rx IncaIncrement Register AGU Inca r0 Inca Rx Insert #U6,#u6,Db,Dn InsertInsert Bit Field Dalu Insert #12,#22,d6,d7 Insert #U6,#u6,Db,Dn JF Rn Jump If False AGUJF lbl JF label Bit absolute long address JFD JFD labelJFD Rn $00E0 $00 0000 $0000 $00 0000 002A $00 0000 001A JMP label JMPJump AGU Jmp label JMP label Jmpd label Jump Using a Delay Slot AGUJmpd Example jmpd lbl AaaaaaaaaaaaaaaaAAAAAAAAAAAAAAAAA JSR label JSRJump to Subroutine AGU Jsr r6 Absolute long address Jsrd Rn Example jsrd r6Next* PC → RAS Rn → PC Jsrd label Jsrd label JT Rn Jump If True AGUJt r0 JT label JT label JTD label Jump If True Using Delay Slot AGUJTD Example jtd r0 JTD 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 → PC LCn Description Status and Conditions that Affect Lpmark ExecutionTable A-17. Combinations of LPMARKx Use LFn Instruction Disassembled Instruction Comments Status and Conditions Changed by Lpmark ExecutionPrefix Formats and Opcodes Insertion of lpmarkb by assembler Lsll 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 d4 Rx1 → Rx 0 → Rx31 LsraBitwise Shift Right By One Bit AGU Lsra r2 Lsrr #u5,Dn LsrrMultiple-Bit Bitwise Shift Right Dalu Lsrr Da,Dn Before After Lsrr d4,d2 Bit unsigned immediate data Lsrw Da,Dn LsrwWord Bitwise Shift Right Dalu Lsrw d4,d2 Lsrw Da,Dn MAC #s16,Da,Dn MACSigned Fractional Multiply-Accumulate Dalu Mac d4,d5,d6 Mac #$1000,d5,d6 SC140 DSP Core Reference Manual 235 Macr ±Da,Db,Dn MacrMacr d4,d5,d6 RndDn ± Da.H * Db.H → Dn 000 0000 0000 1000 $0008 Instruction Formats and Opcodes 238 Macsu Dc,Dd,Dn MacsuMacsu d0,d1,d4 Dn + Dc.H * Dd.L → Dn 111 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 Syntax Macuu 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,d4 If Dg.L Dh.L, then Dg.L → Dh.L MAX2Max2 d0,d4 If Dg.H Dh.H, then Dg.H → Dh.H 00 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 → VFn Max2vit 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,d5 Description MOVE.2FMove Two Fractional Words from MOVE.2F Memory to a Register Pair AGU MOVE.2F EA,DaDb DaDb Data Register Pairs MOVE.2L DaDb,EA MOVE.2L EA,DaDb MOVE.2LMove.2l d0d1,r0 Da,Db ↔ EA Read/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 AGU DaDbDcDd Data Register Quad Move.4f r0,d0d1d2d3 MOVE.4W EA ↔ DaDbDcDdMOVE.4W EA,DaDbDcDd MOVE.4W DaDbDcDd,EA Move.4w d0d1d2d3,r0 Byte Move AGU MOVE.B MOVE.B DR,SP+s15 Move.b d3,r7+$3MOVE.B DR,ea MOVE.B SP+s15,DR MOVE.B a16,DR S15 A32 MOVE.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.L General Registers Cccc #u32 #s32 MOVE.L Da.EDb.E,SP+s15 MOVE.L SP+s15,De.E MOVE.L Da.EDb.E,a32 Move.l d0.ed1.e,$1224MOVE.L SP+s15,Do.E MOVE.L a32,De.E Da.EDb.E ff Data Register Extension Pair Data Register 278 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+u3 MOVE.L SP+s15,C4 MOVE.L C4,SP+s15 Move.l d0,r0 MOVE.L EA,DR MOVE.L DR,EA Read/Write Notation Rrr Address Register Unsigned 3-bit offset MOVE.W #s16,SP-u5 MOVE.W #s7,DRMOVE.W #s16,C4 MOVE.W #s16,a16 Move.w #$0050,r7 MOVE.W #s7,DR MOVE.W #s16,C4 Sa16 #s7 MOVE.W a16,C4 MOVE.W C4,a16 MOVE.WMove Integer Word AGU MOVE.W a32,DR MOVE.W DR,a32 MOVE.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+Rr Move.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,Rn Qqq 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.F Moves.f d0,r0 MOVES.F Db,a16 304 Moves.l d0,r0 MOVES.LMove Long to Memory With Scaling and Saturation AGU Operation MOVES.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 → Db 31IIIIIIIIIIIIIIII16 MOVEU.W #u16,Db.H Moveu.w #$2345,d10.l#u16 → Db3116 #u16 → Db150 Iiiiiiiiiiiiiiii Bit unsigned immediate data #u16 MOVEU.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 → Dn Mpy d6,d6,d7 SC140 DSP Core Reference Manual 321 Mpyr Da,Db,Dn MpyrMpyr d4,d5,d6 RndDa.H * Db.H → Dn Register/Memory Address Before After L6D6 $0000 324 Mpysu Dc,Dd,Dn MpysuMpysu d4,d5,d6 Dc.H * Dd.L → Dn 326 Mpyus Dc.L * Dd.H → DnMpyus Dc,Dd,Dn 328 Mpyuu Dc,Dd,Dn MpyuuMpyuu d4,d5,d6 Dc.L * Dd.L → Dn 330 NEG Dn NEGNegate Dalu Neg d3 NEG Dn Nop NOPNo Operation Prefix No operation ~Da → Dn NotBitwise Complement Dalu Not d4,d5 SC140 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 → Dn SC140 DSP Core Reference Manual 341 Or #u16,DR.L Or #$0f0a,d0.l#u16 DR.L → DR.L #u16 DR.H → DR.H Or #u16,DR.L Or #u16,DR.H OR.W #u16,a16 OR.W #u16,RnOR.W #u16,SP-u5 OR.W #u16,SP+s16 OR.W #u16,Rn Or.w #$f01a,r1 346 POP Do SP 8 → De SP 8 → SPSP 4 → Do SP 8 → SP POP De Pop d3 Extension Pairs, Even Registers, and Loop Start Registers Eeeee NSP 4 → Do NSP 8 → ΝSP NSP 8 → De NSP 8 → ΝSP Popn d6.ed7.e Popn DePopn Do 352 Push Do De → SP SP + 8 → SPDo → SP + 4 SP + 8 → SP Push De Push d0.ed1.e SC140 DSP Core Reference Manual 355 Pushn Do De → NSP NSP + 8 → ΝSPDo → NSP + 4 NSP + 8 → ΝSP Pushn De Pushn d0.ed1.e Pushn De Pushn Do RND Da,Dn RNDRound Dalu RndDa → Dn Rnd d2,d1 Rnd d1,d5 RND Da,Dn ROL Dn Rol d5Dn3801 → Dn391 Dn39 → C → Dn0 ROL Dn ROR Dn Ror d15Dn39-11 → Dn38-0 → Dn39 Dn0 → C ROR Dn RTE SP 8 → PCSP 4 → SR SP 8 → SP → Nmid Instruction Words Cycles1 Type Rte Rted Trap Example rted If RAS valid, then RAS → PC RTSReturn From Subroutine AGU Rts RTS Rtsd Rtsd Rtsd Register Address Bit Name Description EMR3 Restore PC from Stack AGURtstk Cleared Example rtstk Rtstkd SP 8 → PCSP 8 → SP Example rtstkd SAT.F Da,Dn SAT.FSat.f d2,d3 If Da $007FFFFFFF then $007FFF0000 → Dn SAT.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 → Dd SBC Dc,Dd RndDn Da → Dn SBRSubtract And Round Dalu Sbr d3,d0 0010 1010 1110 0111 0000 0000 1000$2AE7 Skipls label If LCn ≤ Then PC + displacement → PC Skipls label → LFnSkipls Skipls label Skipls label Stop Stop Stop Instruction Processing AGU OperationEnter the stop processing state SUB #u5,Dn SUBSubtract Dalu Sub d1,d0,d2 Sub 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,r0 Suba 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 → Dn SUBNC.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,d14 TFR Da,Dn Tfra rx,Rx TfraTfra r0,r1 Rx → Rx SC140 DSP Core Reference Manual 407 Else Rn → ESP To/from a Register AGUIf Srexp = Then NSP → Rn Else ESP → Rn If Srexp = Then Rn → NSP Tfra r0,osp Tfrt Da, Dn Tfrt d14,d15If T=1, then Da → Dn If T=0, then Da → Dn Tfrt TRAPn Trap Execute a Software Exception AGU Trap Operation Trap If Dn == 0, then 1 → T, else 0 → T TsteqTest for Equal to Zero Dalu Tsteq d1 TSTEQA.W Rx TSTEQA.x Test for Equal to Zero AGU TSTEQA.x OperationTsteqa.w r4 Tsteqa.l r1 TSTEQA.W TSTEQA.L If Dn = 0, then 1 → T, else 0 → T TstgeTest for Greater Than Or Equal to Zero Dalu Tstge d4 Tstgea.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 → Τ Tstgta Rx Tstgta Test for Greater Than Zero AGU Tstgta OperationTstgta r2 If Rx 0, then 1 → T, else 0 → Τ Viterbi Shift Left Move AGU Word Big Endian ModeLittle Endian Mode VSL VSL.2F D1D3,Rn+N0 VSL.4W D2D6D1D3,Rn+N0VSL.4F D2D6D1D3,Rn+N0 VSL.2W D1D3,Rn+N0 Vsl.2w d1d3,r0+n0 After Little EndianAfter Big Endian VSL.4W Response Enters the low-power standby Wait processingWait State Wait 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 Registry Table 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