Convergent Rounding No Scaling | Freescale Semiconductor SC140

DALU

Figure 2-5 shows the four cases for rounding a number in the Dn.h register. If scaling is set in the SR, the rounding position is updated to reflect the alignment of the result when it is put on the data bus. However, the contents of the register are not scaled.

Case I: If D0.l < $8000 (1/2), then round down (add nothing)

Before Rounding
					0

	D0.e		D0.h					D0.l
X X . . X X		X X X . . . X X X 0 1 0 0				0 1 1 X X X . . . . X X X
39	32 31		16 15				0


After Rounding
	D0.e		D0.h		D0.l*
X X . . X X		. . .X X X X X X 0 1 0 0		0 0 0 . . .	. . . . . . 0 0 0
39	32 31		16 15		0

Case II: If D0.l > $8000 (1/2), then round up (add 1 to D0.h)

Before Rounding
					1

	D0.e		D0.h					D0.l
X X . . X X		X X X . . . X X X 0 1 0 0				1 1 1 0 X X . . . . X X X
39	32 31		16 15				0


After Rounding
	D0.e		D0.h		D0.l*
X X . . X X		. . .X X X X X X 0 1 0 1		0 0 0 . . .	. . . . . . 0 0 0
39	32 31		16 15		0

Case III: If D0.l = $8000 (1/2), and the LSB of D0.h= 0, then round down (add nothing)

Before Rounding
					0

	D0.e		D0.h					D0.l
X X . . X X		X X X . . . X X X 0 1 0 0				1 0 0 0 . . . . . . . . 0 0 0
39	32 31		16 15				0


After Rounding
	D0.e		D0.h		D0.l*
X X . . X X		. . .X X X X X X 0 1 0 0		0 0 0 . . .	. . . . . . 0 0 0
39	32 31		16 15		0

Case IV: If D0.l = $8000 (1/2), and the LSB of Do.h = 1, then round up (add 1 to D0.h)

Before Rounding
					1
					1
	D0.e		D0.h					D0.l
X X . . X X		X X X . . . X X X 0 1 0 1				1 0 0 0 . . . . . . . . 0 0 0
39	32	31	16			15	0


After Rounding
	D0.e		D0.h		D0.l*
X X . . X X		. . .X X X X X X 0 1 1 0		0 0 0 . . .	. . . . . . 0 0 0
39	32 31		16 15		0

*D0.l is always clear, performed during RND, MPYR, and MACR.

Figure 2-5. Convergent Rounding (No Scaling)

2-22	SC140 DSP Core Reference Manual

Image 54

Freescale Semiconductor SC140 specifications Convergent Rounding No Scaling

Contents

SC140 DSP Core Reference Manual 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 SC140 DSP Core Instruction Set Appendix a StarCore Registry Appendix B 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 History Revision Date Description Chapter Introduction Target Markets Architectural Differentiation Core Architecture Features Typical System-On-Chip Configuration System expansion area Variable Length Execution Set Vles Software ModelSoC DSP expansion area SC140 platform Core Architecture Features Chapter Core Architecture Architecture Overview Block Diagram of the SC140 Core Data Arithmetic Logic Unit Dalu Multiply-Accumulate MAC Unit Address Generation Unit AGUData Register File Bit-Field Unit BFU Stack Pointer Registers Bit Mask Unit BMU Instruction Set Accelerator Plug-in Isap Interface Program Sequencer Unit PseqEnhanced On-Chip Emulator EOnCE Memory Interface Dalu Dalu Architecture Dalu Programming Model Limit EXT Data Registers D0-D15 Write to Data Registers Read from Data RegistersOperand Type Dn.e Dn.h Dn.l Operand Type Data Width Bits Data Registers Access WidthDalu Arithmetic Instructions MAC Instruction Description DIV NEG Data Shifter/Limiter Dalu Logical Instructions BFU Calculating the Ln Bit ScalingLimiting Scaling Example Scaling Mode Bits Defining the Ln bit Calculation Limiting with the Moves InstructionsLn Bit Calculation Limiting Example Scaling and Arithmetic Saturation Mode InteractionsSelected Special Six Other Dalu Instructions Mode 10. Scaling and Limiting Interactions Dalu Arithmetic and Rounding Data Representation11. Saturation and Rounding Interactions Data Formats Signed Fractional Signed Integer 12. Two’s Complement Word RepresentationsSigned Fractional Signed Integer Unsigned Integer Unsigned Arithmetic MultiplicationDivision Unsigned Multiplication Rounding Modes 13. Rounding Position in Relation to Scaling ModeScaling Mode High Portion Low Portion Unsigned Comparison Convergent Rounding No Scaling 2.6.2 Two’s Complement Rounding Two’s Complement Rounding No Scaling Arithmetic Saturation Mode 14. Arithmetic Saturation Example Multi-Precision Arithmetic Support Fractional Multi-Precision Arithmetic Fractional Double-Precision Multiplication Integer Multi-Precision Arithmetic Fractional Mixed-Precision Multiplication 10. Signed Integer Double-Precision Multiplication Viterbi Decoding Support 11. Unsigned Integer Double-Precision Multiplication Address Generation Unit AGU Architecture Address ArithmeticUnit AAU Address Generation Unit AGU Programming Model 13. AGU Programming Model Address Registers R0-R15 Stack Pointer Registers NSP, ESP Modifier Registers M0-M3 Offset Registers N0-N3Base Address Registers B0-B7 Shadow Stack Pointer Registers 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 Width Memory Access Misalignment 19. Memory Address Alignment Access Type Aligned AddressAddressing Modes Summary 20. Addressing Modes Summary Address Register Indirect PC RelativeSpecial Modulo Addressing Mode Linear Addressing ModeReverse-carry Addressing Mode Address Modifier Modes 15. Modulo Addressing Example Multiple Wrap-Around Modulo Addressing Mode 21. Modulo Register Values for Modulo Addressing ModeModifier Mj Address Calculation Arithmetic Arithmetic Instructions on Address Registers 23. AGU Arithmetic Instructions Bit Mask Instructions Bit Mask Test and Set Semaphore Support Instruction 24. AGU Bit Mask Instructions BMU Example of Normal Usage of the Semaphoring Mechanism Move InstructionsSemaphore Hardware Implementation Label BMTSET.W #mask,R0 JT label 25. AGU Move Instructions MOVE.W 16. Integer Move Instructions 17. Fractional Move Instructions Memory Interface 18. Bit Allocation in MOVE.L D0.eD1.e 1 SC140 Endian Support 1.1 SC140 Bus Structure Memory Organization 20. Basic Connection between SC140 Core and Memory Data Moves 26. Data Representation in MemoryRepresentation Type Value 22. Data Transfer in Big and Little Endian Modes Multi-Register Moves Address Data 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.F D0, R0 Example MOVE.L D0.ED1.E, A0Example MOVE.2L D0D1, R0 Example MOVE.2F D0D1, R0 Example VSL.4F D2D6D1D3, R0 + N0 Example VSL.4W D2D6D1D3, R0 + N0D6 = Example VSL.2W D1D3, R0 + N0 Example BMSET.W #$1234, A0 Example Push D0Example Push D0 Push D1 Data = 31. Control Instructions in Big and Little Endian Modes Instruction Register Operands Big Little Endian Core Control Registers Status Register SR Name Description Settings Describes the various SR bitsStatus Register Description I2-I0 Interrupt Mask Bits Reflect Exceptions Exception Mode Bit Selects Overflow Exception Enable BitDisable Interrupts Bit When this bit Reserved Scaling Mode Bit Equation ModeS1-S0 Scaling Mode Bits Specify Rounding Mode Bit Selects the type Name Description Settings Arithmetic Saturation Mode Selects Exception and Mode Register EMR Exception and Mode Register EMR Describes the EMR fields EMR Description Ilst Illegal Execution Set Indicates whether an Bmclr #$fffb,EMR.L PLL and Clock RegistersClearing EMR Bits Example 3-1. Clearing an EMR Bit Emulation and Debug EOnCE Debugging System Overview of the Combined Jtag and EOnCE Interface Jtag Interface Signal DescriptionsSignal Name Signal Description Cascading Multiple SC140 EOnCE Modules in a SoC Jtag Scan Paths Jtag Instructions Loadgpr TAP Controller State Machine Jtag Scan Paths Select-DR Scan Path Select-IR Scan Path Activating the EOnCE Through the Jtag Port Enabling the EOnCE Module Debugrequest and Enableeonce Commands Reading/Writing EOnCE Registers Through Jtag Reading and Writing EOnCE Registers Via Jtag EOnCE register write operation through Jtag EOnCE register read capture operation through Jtag Main Capabilities of the EOnCE Module EOnCE SignalsEOnCE Signals Jtag Signals Core Interface EOnCE Dedicated Instructions Debug State Debug Exception Executing an Instruction while in Debug StateSoftware Downloading Software Downloading EOnCE Events EOnCE Event TypesEvent type Occurs when EOnCE Event and Action Summary EOnCE ActionsEvent and Action Summary Event type EOnCE Enabling and Power Considerations EOnCE Module Internal ArchitectureEOnCE Controller Address Monitor and Control Register Command RegisterTransmit Register Update Signal from the TAP Controller Address Control Decoder Logic Receive Register Event Counter Shows a block diagram of the event counter Event Counter Register Set Event Detection Unit EDU XDBxx Data Buses EE5..0Address Buses EventD Event0 Event1 Event2 Event5 Count event Address Event Detection Channel Edca EEi Edca Register Set EventD Data Event Detection Channel EdcdEvent External Event 6,7 Count Event Edcd register set is shown below Event Selector ES Optional External Event Detection Address Channels Event0..Event5 External Event6, Event7 EventD Count event EE40 ES block diagram is shown in FigureTrace Unit 10. Event Selector Register Set 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 EOnCE Register Addressing 11. Trace Buffer Register Set 12 displays the EOnCE register addressing offsets 12. EOnCE Register Addressing OffsetsOffset EDCA4REFA Reading or Writing EOnCE Registers Using Core Software Real-Time Jtag Access General EOnCE Register Issues Real-Time Data Transfer EOnCE Register Addressing EOnCE Controller Registers EOnCE Command Register ECRRead/Write Command Specifies 13 describes the ECR fields 16 displays the bit configuration of the ESR EOnCE Status Register ESR 14 describes the ESR fields 14. ESR DescriptionName Description Section DREE3 15. Emcr Description EOnCE Monitor and Control Register Emcr15 describes the Emcr fields Name Description Reserved Debugerst EOnCE Receive Register Ercv EOnCE Transmit Register Etrsmt Detection by the Event Detection Channels EE SignalsEE Signals as Outputs Detecting Entry into Debug State EE Signals as Inputs EE Signals Control Register Eectrl 16. Eectrl Description Eeddef EE2DEF 17. Length Control Bits Core Command Register CorecmdLength control bits are described in -17, below Length Control Bits Description PC of Last Execution Set Pclast PC of the Exception Execution Set PcexcpPC of the Next Execution Set Pcnext PC Breakpoint Detection Register Pcdetect Event Counter Registers Event Counter Control Register Ecntctrl 18. Ecntctrl Description Extended Mode of Operation Bit18 describes the Ecntctrl fields Reserved for Test Event Counter Enable Used to Event Counter Value Register EcntvalEvents to be Counted Determines EC Signals Extension Counter Value Register Ecntext Edca Control Registers EDCAiCTRL Event Detection Unit EDU Channels and RegistersAddress Event Detection Channel Edca 19 describes the EDCAiCTRL fields Event Detection Channel EDCAi Comparators Selection Used to Access Type Selection These bits Comparator B Condition SelectionComparator a Condition Selection Edca Reference Value Registers a and B EDCAiREFA, EDCAiREFB Edca Mask Register EDCAiMASK 20 describes the Edcdctrl fields Data Event Detection Channel EdcdEdcd Control Register Edcdctrl 20. Edcdctrl Description Access Width Selection AWS Access Type Selection The ATS bit Comparator Condition Selection Edcd Reference Value Register Edcdref Event Selector ES RegistersEvent Selector Control Register Eselctrl Edcd Mask Register Edcdmask Eselctrl fields are described in Table 21. Eselctrl Description 24 displays the bit configuration of Eseldm Event Selector Mask Debug State Register Eseldm Event Selector Mask Enable Trace Register Eseletb Event Selector Mask Debug Exception Register Eseldi Event Selector Mask Disable Trace Register Eseldtb Trace Unit RegistersTrace Buffer Control Register Tbctrl Trace mode This mode is usefull only with the Tcount mode22. Allowed tracing mode combinations Upon a trace event, trace the counter value Ecntval 23. Tbctrl Description Trace Buffer Counter ModeTbctrl fields are described in the following table Trace Buffer Extension Counter Trace Mark Instruction Mode Trace Loops Mode Enables tracingTrace Buffer Enable Mode Enables Trace Issue of Execution Sets Enable Trace Buffer Read Pointer Register Tbrd Trace Buffer Write Pointer Register TbwrTrace Buffer Register Tbbuff Trace Unit Registers Chapter Program Control Pipeline Instruction Pipeline Stages Illustrates the five instruction pipeline stages Instruction Cycle Operation Pipeline ExamplePipeline Stages Overview Pipeline Stage Description Instruction Pre-Fetch and Fetch Instruction DispatchAddress Generation Instruction Grouping ExecutionExample 5-1. Four SC140 Instructions in an Execution Set Grouping Types Instruction Grouping Methods Serial Grouping Prefix Grouping Prefix Types Two-Word Prefix For example Conditional ExecutionOne-Word Low Register Prefix Prefix Instructions Assembly Syntax Meaning Prefix Selection Algorithm Low Register Prefix Selection Algorithm Instruction Reordering Within an Execution Set Example 5-4. Conditional Vles Having Two Subgroups Example 5-5. Set of 2 Two-word Instructions Requiring a NOP Instruction Timing Sequential Instruction Timing Instruction Categories Timing Summary Bit Mask Instruction Timing Dalu Instruction TimingMove Instruction Timing Compare Shift Test Example 5-6. Delayed Change-of-Flow and Its Delay Slot Change-Of-Flow Instruction TimingNon-Loop Change-of-Flow Instructions Direct, PC-Relative, and Conditional COF Loop Change-Of-Flow Instructions Delayed COF COF Execution Cycles Number of Cycles Needed by Change-of-Flow Instructions Example 5-7 shows a case when a stall cycle is addedHighest cycle count of instructions grouped with Call Example 5-7. Subroutine Call Timing Memory Access Timing Memory Access Examples MOVE.L Example 5-8. Parallel Execution of Two Move Instructions Implicit Push/Pop Memory Timing Memory Stall Conditions Hardware Loops Loop Programming ModelLoop Start Address Registers SAn Loop Notation and Encoding Loop Counter Registers LCnStatus Register SR Loop Flag Bits Loop Type Loop Initiation and ExecutionLpmarka and Lpmarkb Bits in Short and Long Loops Location Functionality Loop Nesting Loop Iteration and Termination 10. Loop Control Instructions Loop Control Instructions10 lists the loop instructions Instruction Operation 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 2 SC140 Dual Stack Memory Use Shows the stack structure 12. Even and Odd Registers Stack Support Instructions11. Stack Push/Pop Instructions Even Register De File Odd Register Do File 13. Stack Memory Map Addressing Mode DescriptionShadow Stack Pointer Registers 14. Stack Move Instructions Fast Return from Subroutines Working Mode EXP bit Active SP Normal Working ModeException Working Mode Working Modes Typical Working Mode Usage Scenarios Dual-stack Rtos From Normal to Exception mode Working Mode TransitionsFrom Exception to Normal mode Single-stack Rtos Working Modes Processing States Processing State Change Instructions16. Processing State Change Instructions 10. Core State Diagram Processing State Transitions 17. Processing State Transitions Reset Processing StateExecution State Processing State Transitions Description Wait Processing State Stop Processing State 18. Exit Wait Processing State due to an Interrupt or NMI Exception Processing SC140 11. Core-PIC Interface 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 Internal Exceptions Maskable InterruptsNon-Maskable Interrupts NMI Interrupt Priority Level Illegal Exception Illegal InstructionIllegal Execution Set Trap Exception Exception Interface to the PipelineDalu Overflow Debug Exception 20. Exception Pipeline Exception Mode ExecutionException Timing Example 5-17. Basic Exception Timing Exception Processing 12 provides a flow chart for Example 21. Pipeline Example Instruction Set Accelerator Plug-In Introduction Data Memory Isap SC140 Schematic ConnectionSingle Isap SC140Core Core to Multiple Isap Connection Schematic Multiple Isap Isap Encoding Fields Isap Memory AccessIsap instructions and instruction encoding Binary Encoding Words Bits Example 6-1. Isap memory access ISAP-core register transfersTo understand this, look at the following lines of code Example 6-2. ISAP-Core register transfers Immediate Data Transfer to Isap registersFollowing line of code Example 6-3. ISAP-Core register transfers Working with One Isap Core Assembly Syntax with an IsapIdentification of Isap instructions Vles that uses an implicit Isap ID string 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 6-6. Conditional Execution Example Example 6-7. Conditional Execution Example Programming Rules Isap Functions that Interact With the Core Grouping rules for explicit Isap instructions Rules for implicit AGU instructions Sequencing rules for T bit update D.2, D.3 Programming Rules Vles Sequencing Semantics Vles Grouping Semantics Vles Grouping Semantics SC140 Pipeline Exposure Programming Rule NotationGrouping Rules Sequencing Rules Register Read/Write MOVE-like Instructions Status Bit UpdatesInstruction Words Register Aliasing AGU Arithmetic Instructions Delayed COF InstructionsDelay Slot Change-Of-Flow Destinations Hardware Loops Enabled LoopStatic Programming Rules Hardware Loop Detection Rule G.G.2 General Grouping RulesRule G.G.1 Rule G.G.3 Example 7-6 Duplicate Address Pointer Register Destinations Rule G.G.4Example 7-5 Duplicate PC Destinations Example 7-7 Duplicate Stack Pointer Destinations Example 7-9 Duplicate SR/EMR Register Destinations Rule G.G.4 ExceptionsExample 7-8 Duplicate Register Destinations Example 7-10 Duplicate Status Bit Destinations Following rules only apply to prefix-grouped Vles Prefix Grouping RulesRule G.G.5 Example 7-15. Dalu Register Use Exceeds Four Times Rule G.P.1 Example 7-16 Vles Extension Words Exceed TwoExample 7-17 Two-Word Instructions Exceed Two Rule G.P.5 Rule G.P.3Rule G.P.4 Example 7-18. Vles Has Mutually Exclusive Instructions Example 7-20. Data Source Use of Nn and Mn Registers Rule G.P.6Rule G.P.7 Example 7-21. IFc Having Two Subgroups 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 Example 7-30. Instructions in a Delay Slot Delayed COF RulesExample 7-29. Nmid Update to EMR Read Rule A.7 Rule D.2 Example 7-31. Instructions in a Rted Delay SlotExample RTE/D with SR Updates Rule D.3 Rule D.5a Rule D.4Rule D.5 Rule D.6 Rule D.9 Status Bit RulesRule D.8 Rule T.1 Rule T.2.c Rule T.2.aRule T.2.b Rule SR.2 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 Rule L.N.1 Loop Nesting RulesRule SR.7 DI and EI DOENn and DOENSHn Example 7-49. Nested Loops with Ordered Index Rule L.N.2Rule L.N.3 Example 7-50. Nested DOENn/DOENSHn Instructions Example 7-52. Loopend between Doen and Loopend Example 7-53. Changing a loop type Rule L.L.2 Loop LA RulesRule L.L.1 Example 7-54. Instructions at the End of Long Loops LA of a short loop cannot be at LA-1 of a long loop Rule L.L.3Rule L.L.4 Example 7-56. Instructions in Short Loops Rule L.L.6 Loop Sequencing RulesRule L.L.5 Rule L.D.1 Rule L.D.6 Rule L.D.3Rule L.D.5 Example 7-60. LCn Write at the Start of Short Loop n Rule L.D.7 Rule L.D.8Rule L.D.9 Rule L.C.2 Loop COF RulesRule L.C.1 Rule L.C.3 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 Rule L.C.7 Example 7-69. Loop COF Destination in the Same Loop Example 7-70. Loop COF at End of Nested Long Loops Rule L.C.9Rule L.C.10 Example 7-71. Subroutine Call to End of Loops Rule L.C.12 General Looping RulesRule L.C.11 Rule L.G.3 Rule L.G.5 Dynamic Programming RulesAGU Dynamic Rules Rule A.2a Rule A.6 Memory Access RulesRule A.5 Rule D.7 Rule J.4 RAS RulesLoop Rules Rule L.N.6 Cycle-Based COF Rules Example 7-83. A.2 from a Delay Slot to a COF DestinationRule Detection Across COF Boundaries Example 7-82. SR.2 Across a COF Boundary VLES-Based COF Rules Rule SR.2a Example 7-85. EMR access at the start of an exceptionRule Detection Across Exception Boundaries Rule SR.4b Rule A.1a Example 7-86. Mctl Write to R0-R7 Use Rule J.1 COF destination cannot be a delay slotProgramming Guidelines Rule J.2 Source Code Practices Rules Not Detected Across COF BoundariesGood Programming Practices Rule J.5 Binary Code Practices Lpmark Rules Lpmark Instruction TypeSoftware Development Practices General Grouping Rules Static Programming RulesDynamic Programming Rules Prefix Grouping Rules Loop Nesting Rules Loop LA Rules Lpmark Rule L.L.5 Lpmark Rule L.L.2Lpmark Rule L.L.3 Example 7-93. Active LCn Write at the End of Long Loops Lpmark Rule L.D.2 + L.D.3 Loop Sequencing RulesLpmark Rule L.L.6 Lpmark Rule L.D.6 COF instructions are not allowed at LPB of a long loop Loop COF RulesLpmark Rule L.C.2 Example 7-97. Active LCn Read at the Start of a 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 7-100. Loop COF at End of Nested Long Loops Lpmark Rule L.C.9Lpmark Rule L.C.10 Example 7-101. Subroutine Call to End of 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 Grouping Examples Is encoded as Is assembler mapped to the IFT prefix and encoded as Is assembler mapped to the IFF 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 Operator Description Table A-2. Operations SyntaxTable A-3. Register Abbreviations Abbreviation Register Name Brackets as Isap indicators Brackets as address indicatorsTable A-4. Assembler Syntax Table A-6. Addressing Mode Notation for the ea Operand Addressing Mode NotationTable A-5. Addressing Mode Notation for the EA Operand Addressing Mode Definition Notation in Instruction Field Data Representation in Memory for the Examples Encoding NotationDefinition for the field is Prefix Word Encoding Aaa Instruction Formats and OpcodesInstruction Fields Ccc If true, all the set Example, 2-w prefix + 2 grouped instruction words, aaa =If true D0, D2, A0, if false D1, D3, A1 Prefix Words Cycles Type High data register is used for the op3 field E3 is set Last, or to last-1 ExampleFirst execution set of the loop High data register is used for the op1 field E2 is set DSP Core Instruction Set Instruction Types Instruction Sub-types Table A-7. Dalu Arithmetic Instructions MAC Table A-8. Dalu Logical Instructions BFU Table A-9. AGU Arithmetic Instructions Table A-10. AGU Move Instructions Table A-11. AGU Stack Support Instructions Table A-12. AGU Bit-Mask Instructions BMU Table A-13. AGU Non-Loop Change-of-Flow Instructions Table A-15. AGU Program Control Instructions Table A-16. Prefix Instructions Inst InstructionsInstruction Definition Layout ABS Single Source/Destination Data Register Instruction Dc + Dd + C → Dd ADCAdd Long With Carry Dalu ADC Dc,Dd Dc,Dd Data Register Pairs Register/Memory Address Before Operation Assembler Syntax ADDAdd Dalu Add d0,d1,d2 Add d1,d0,d2 Da,Db Da,Da Data Register Pairs#u5 ADD2 Add Two 16-Bit Values DaluAdd2 d0,d1 JJJ Single Source Data Register Adda #u5,Rx AddaAdd AGU Adda #s16,rx,Rn Adda r0,r1 Address Register Rrrr AGU Source Register AGU Source/Destination Register#s16 Addl1a r0,r1 ADDL1A Add With One-Bit Arithmetic Shift Left ADDL1ASource Operand AGU Rx1 + Rx → Rx ADDL1A rx,Rx Rx2 + Rx → Rx ADDL2A Add With Two-Bit Arithmetic Shift Left ADDL2AAddl2a r0,r1 ADDL2A rx,Rx ADDL2A rx,Rx Carry Bit Dalu ADDNC.WAdd Without Changing ADDNC.W Addnc.w #$ca3e,d1,d2 Instruction Words Cycles Type Adr d3,d4 ADRAdd and Round Dalu RndDa + Dn → Dn ADR Da,Dn #u16$0000,Da,Dn Bitwise and Dalu#0u16,Da,Dn Da,Dn D2,d1 #$0ff2e,d2,d1#$ff2e0000,d2,d1 #0u16 #u16$0000#u16 #u16 DR.H → DR.H #$a70e,d1.h#u16 DR.L → DR.L #u16,DR.L Data/Address Register Cycles Type Opcode AND.W #u16,a16 AND.W #u16,RnAND.W #u16,SP-u5 AND.W #u16,SP+s16 And.w #$54a1,r7 A16 S16 Da 1→ Dn ASLAsl d0,d1 ASL Da,Dn ASL Da,Dn Rx2 → Rx ASL2AAsl2a r0 ASL2A Rx Rx1 → Rx AslaAsla r0 Asla Rx Asll #u5,Dn AsllMultiple-Bit Arithmetic Shift Left Dalu Asll Da,Dn Asll d0,d1 Asll Aslw d0,d1 AslwWord Arithmetic Shift Left 16 Bits Dalu Aslw Da16 → Dn Aslw Da,Dn Da1 → Dn ASRAsr d5,d3 ASR Da,Dn Register/Memory Address Before After Asra Asra r2Asra Rx Asrr Multiple-Bit Arithmetic Shift Right Dalu Asrr #$3,d5 Asrr d3,d5 #u5 Asrw d5,d0 Asrw Da,Dn Asrw Da,Dn BF lbl If T==0, then PC + displacement → PCBranch If False AGU BF label Displacement label Instruction Words Cycles1 Type Opcode BFD lbl BFD Branch If False Using a Delay Slot AGU OperationBFD BFD label Label Displacement ~C1.Li → C1.Li Bmchg~C1.Hi → C1.Hi i denotes bits=1 in #u16 ~DR.Hi → DR.Hi Bmchg #$f0f0,d1.h Clears the Ln bit in the destination data registerControl Registers Iiiiiiiiiiiiiiii 16-bit unsigned immediate data BMCHG.W Bit-Masked Change a Bmchg.w #$661f,$800c BMCHG.W #u16,SP-u5 Bit signed SP address offset Bmclr #u16,C1.L Bmclr Bit-Masked Clear a 16-Bit Operand BMU Bmclr OperationBmclr #u16,C1.H Bmclr #u16,DR.H Bmclr #$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.H Bmset #u16,C1.HBmset #u16,C1.L Bmset #u16,DR.L Bmset #$2436,d1.l BMSET.W Bit Operand in Memory BMU Bmset.w #$f111,$800c Register/Memory Address Before Immediate$800C Bmtset #u16,DR.H BmtsetBmtset #$111f,d1.l Bmtset #u16,DR.L Bmtset #$4238,d4.l BMTSET.W Bit-Masked Test and Set a BMTSET.W Bmtset.w #$4328,$c BMTSET.W #u16,SP-u5 Bmtstc Bmtstc #$8a59,d7.h $0$0024A60000 $00E40000 BMTSTC.W #u16,SP+s16 BMTSTC.WBMTSTC.W #u16,SP-u5 BMTSTC.W #u16,Rn Bmtstc.w #$8A59,r0 BMTSTC.W #u16,SP-u5 Bmtsts #u16,DR.H BmtstsBmtsts #u16,C1.L Bmtsts #u16,DR.L Bmtsts #$24a6,d7.h BMTSTS.W #u16,SP+s16 BMTSTS.WBMTSTS.W #u16,SP-u5 BMTSTS.W #u16,Rn Bmtsts.w #$0428,r0 BMTSTS.W #u16,SP-u5 Branch AGU PC + displacement → PCBRA BRA label AAAAAAAAAA0 Brad Brad labelSource Code Comments $0000 000A $0000 000E Break label PC + displacement → PCBreak → LFn Encoding is the displacement with bit Status and Conditions Changed by Instruction None Example BSRBranch to Subroutine AGU Bsr label BSR PC + displacement → PC, next* PC→RAS Next* PC → SP SR → SP + 4 SP + 8 → SPBsrd label Bsrd label BT lbl If T==1, then PC + displacement → PCBranch If True AGU BT label Register/Memory Address Before BT After BTD lbl BTD Branch If True Using a Delay Slot AGU OperationBTD BTD label $0035 $0000 $0006 $002A $001A $0016 Clb d3,d7 CLBCount Leading Bits Dalu CLB Da,Dn CLB Da,Dn Clr d1 CLRClear a Data Register Dalu → Dn Destination Data Register Source Data Register Cmpeq d2,d3 CmpeqCompare for Equal Dalu If Da == Dn, then 1→ T, else 0 → T 118 Cmpeq.w #$5,d3 CMPEQ.WCMPEQ.W Compare for Equal Dalu CMPEQ.W #u5,Dn CMPEQ.W If rx == Rx, then 1 → T, else 0 → T Cmpeqa Compare for Equal AGU Cmpeqa OperationCmpeqa r1,r2 Cmpeqa rx,Rx Cmpeqa rx,Rx Cmpgt d2,d3 CmpgtCompare for Greater Than Dalu Dn Da → T 124 CMPGT.W #u5,Dn CMPGT.WCmpgt.w #$8002,d2 CMPGT.W #s16,Dn CMPGT.W #u5,Dn Cmpgta r2,r3 CmpgtaCompare for Greater Than AGU Cmpgta Rx rx → T Cmpgta rx,Rx Cmphi d1,d0 CmphiUnsigned Compare for Higher Dalu Cmphi Cmphi Da,Dn 130 Cmphia r0,r1 CmphiaUnsigned Compare for Higher AGU Cmphia Cmphia rx,Rx Cmphia rx,Rx Label ContContinue to the Next Loop Iteration AGU Label Cycles1 Type Opcode Contd Contd label Cycles1 Type Enter Debug Mode AGU DebugDebug Signal a Debug Event AGU Debugev Debugev Deca r0 DecaDecrement a Register AGU Rx 1 → Rx 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 Rx 1 → Rx if Rx==0, then 1 → T, else 0 → T Deceqa Rx Deceqa Decrement and Set T If Equal Zero DeceqaDeceqa r0 Deceqa Rx Dn 1 → Dn Dn≥0 → T DecgeExample decge Decge Dn SC140 DSP Core Reference Manual 145 Rx 1 → Rx Rx ≥ 0 → T DecgeaDecgea r4 Decgea Rx Decgea Rx → DI Determines execution working modeSR19 Set disable interrupt bit SR18Page If Dn39 ⊕ Da39 = DIVDivide Iteration Dalu Then 2 * Dn + C + Da & $FF Ffff 0000 → Dn Div d2,d1 DIV Da,Dn Dn16 + Dc.H * Dd.H → Dn DmacssDmacss d2,d3,d5 Dc signed, Dd signed 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 #u6 Do Enable Long Loop AGUDoen2 d0 DOENn #u16 Loop Identifier #u6 DOENSHn #u6 Do Enable Short Loop AGU DOENSHnDoensh2 d0 DOENSHn #u16 $00E4 $A0E4 PC + displacement → SAn Setup Long Loop DOSETUPnDosetup1 label DOSETUPn label Encoding is the displacement with SR19 Clears disable interrupt bit → DI 164 Eor d4,d5 EORBitwise Exclusive or Dalu Da ⊕ Dn → Dn EOR Da,Dn Eor #$5,d5.l EOR #u16,DR.LEOR #u16,DR.H EOR #u16,DR.L EOR #u16,DR.H EOR.W Bitwise Exclusive or on Eor.w #$aaaa,r0 Extract #$c,#$e,d2,d4 ExtractExtract Extract Signed Bit Field Dalu Extract #U6,#u6,Db,Dn Jjj Single Source/Destination Data Register Extractu #$c,#$e,d2,d4 ExtractuExtractu Extract Unsigned Bit Field Extractu #U6,#u6,Db,Dn Extractu #U6,#u6,Da,Dn Iaddnc.w #$a002,d2 IADDNC.W #s16,Dn Else treat as NOP If T == Then execute group/subgroup Conditionally Execute a Group or Subgroup Prefix IFcIf T == Then execute group/subgroup Else treat as NOP Execute group/subgroup unconditionally Ift move.w #$ffff,d0 Ccc Conditional execution of the entire execution set Illegal Illegal Dn ± Da.L * Db.L → Dn ImacImac d4,d5,d6 Imac ±Da,Db,Dn Imac -d4,d5,d6 Accumulation Notation 182 Dn + Da.L * Db.H → Dn Imaclhuu Da,Db,Dn Imaclhuu Da,Db,Dn Unsigned By Signed Dalu Operation Assembler Syntax ImacusInteger Multiply Accumulate Imacus d3,d4,d0 $0002 x -64 $FFC0 -128 $FF80 +0 $0000 -128 $FF80 Da.L * Db.L → Dn ImpyInteger Multiply Dalu Impy Da,Db,Dn D1,D1 D3,D3 D5,D5 D7,D7 Impy.w #$fffe,d3 #s16 * Dn.L → DnIMPY.W #s16,Dn +16 Impyhluu d4,d3,d0 ImpyhluuInteger Multiply Upper Impyhluu Da.H * Db.L → Dn Impyhluu Da,Db,Dn Impysu Da,Db,Dn ImpysuImpysu d3,d5,d1 Register Bit Name Description Address Impysu Da,Db,Dn Impyuu Impyuu d5,d3,d1Impyuu Da,Db,Dn 196 Inc d0 INCINC Increment a Data Register By One Dalu Operation INC Dn Inc d15 Inc.f d15 Dn + $0000010000 → DnINC.F Dn INC.F Dn Inca r0 IncaIncrement Register AGU Rx + 1 → Rx Inca Rx Insert #12,#22,d6,d7 InsertInsert Bit Field Dalu Insert #U6,#u6,Db,Dn Insert #U6,#u6,Db,Dn JF label Jump If False AGUJF lbl JF Rn 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 Example jmpd lbl Jump Using a Delay Slot AGUJmpd Jmpd label AaaaaaaaaaaaaaaaAAAAAAAAAAAAAAAAA Jsr r6 JSRJump to Subroutine AGU JSR label Absolute long address Jsrd label Example jsrd r6Next* PC → RAS Rn → PC Jsrd Rn Jsrd label JT label Jump If True AGUJt r0 JT Rn JT label Example jtd r0 Jump If True Using Delay Slot AGUJTD JTD label JTD label LCn 1 → LCn Else next PC → PC → LFn If LCn Then SAn → PC LPMARKx End-of-Loop Mark Prefix LPMARKx OperationIf LCn Then SAn → PC LCn 1 → LCn Else next PC → PC → LFn → SLF LFn Status and Conditions that Affect Lpmark ExecutionTable A-17. Combinations of LPMARKx Use LCn Description Insertion of lpmarkb by assembler Status and Conditions Changed by Lpmark ExecutionPrefix Formats and Opcodes Instruction Disassembled Instruction Comments Lsll d4,d2 LsllMultiple-Bit Bitwise Shift Left Dalu Lsll Da,Dn $00E4 $0$FF 8765 Lsr d4 LSRBitwise Shift Right One Bit Dalu Dn1 → Dn 0 → Dn39 Lsra r2 LsraBitwise Shift Right By One Bit AGU Rx1 → Rx 0 → Rx31 Lsrr Da,Dn LsrrMultiple-Bit Bitwise Shift Right Dalu Lsrr #u5,Dn Lsrr d4,d2 Before After Bit unsigned immediate data Lsrw d4,d2 LsrwWord Bitwise Shift Right Dalu Lsrw Da,Dn Lsrw Da,Dn Mac d4,d5,d6 MACSigned Fractional Multiply-Accumulate Dalu MAC #s16,Da,Dn Mac #$1000,d5,d6 SC140 DSP Core Reference Manual 235 RndDn ± Da.H * Db.H → Dn MacrMacr d4,d5,d6 Macr ±Da,Db,Dn 000 0000 0000 1000 $0008 Instruction Formats and Opcodes 238 Dn + Dc.H * Dd.L → Dn MacsuMacsu d0,d1,d4 Macsu Dc,Dd,Dn 111 1111 1111 1111 $FFFF Instruction Formats and Opcodes Macus Dn + Dc.L * Dd.H → DnMacus Dc,Dd,Dn Macus Dc,Dd,Dn Unsigned By Unsigned Dalu Operation Assembler Syntax MacuuFractional Multiply-Accumulate Macuu d2,d3,d1 Macuu Dc,Dd,Dn Mark Push the PC into the Trace Buffer AGU MarkPC → trace buffer Max d0,d4 MAXTransfer Maximum Signed Value Dalu If Dg Dh, then Dg → Dh If Dg.H Dh.H, then Dg.H → Dh.H MAX2Max2 d0,d4 If Dg.L Dh.L, then Dg.L → Dh.L 00 D0,D4 01 D1,D5 10 D2,D6 11 D3,D7 248 Else 1 → VFn MAX2VITIf Da.L Db.L, then 0 → VFn, Da.L → Db.L MAX2VIT Da,Db 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 d1,d5 MINTransfer Minimum Signed Value Dalu MIN Dg,Dh Memory to a Register Pair AGU MOVE.2FMove Two Fractional Words from MOVE.2F Description DaDb Data Register Pairs MOVE.2F EA,DaDb Da,Db ↔ EA MOVE.2LMove.2l d0d1,r0 MOVE.2L DaDb,EA MOVE.2L EA,DaDb Read/Write Notation EA ↔ DaDb MOVE.2WMove.2w d0d1,r0 MOVE.2W EA,DaDb MOVE.2W DaDb,EA $FF Ffff AF44 Memory to a Register Quad AGU MOVE.4FMove Four Fractional Words from MOVE.4F EA → DaDbDcDd Move.4f r0,d0d1d2d3 DaDbDcDd Data Register Quad MOVE.4W EA ↔ DaDbDcDdMOVE.4W EA,DaDbDcDd MOVE.4W DaDbDcDd,EA Move.4w d0d1d2d3,r0 MOVE.B Byte Move AGU MOVE.B SP+s15,DR Move.b d3,r7+$3MOVE.B DR,ea MOVE.B DR,SP+s15 MOVE.B a16,DR A32 S15 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.L Move Long Word AGU Cccc General Registers #s32 #u32 MOVE.L SP+s15,De.E MOVE.L Da.EDb.E,SP+s15 MOVE.L a32,De.E Move.l d0.ed1.e,$1224MOVE.L SP+s15,Do.E MOVE.L Da.EDb.E,a32 Data Register Da.EDb.E ff Data Register Extension Pair 278 Move Long AGU MOVE.L Rn+u3,DR MOVE.L DR,Rn+u3 MOVE.L a32,DR MOVE.L DR,a32MOVE.L a16,C4 MOVE.L C4,a16 MOVE.L Rn+s15,DR MOVE.L DR,Rn+s15 Move.l d0,r0 MOVE.L SP+s15,C4 MOVE.L C4,SP+s15 MOVE.L EA,DR MOVE.L DR,EA Rrr Address Register Read/Write Notation Unsigned 3-bit offset MOVE.W #s16,a16 MOVE.W #s7,DRMOVE.W #s16,C4 MOVE.W #s16,SP-u5 Move.w #$0050,r7 MOVE.W #s7,DR MOVE.W #s16,C4 #s7 Sa16 MOVE.W a32,DR MOVE.W DR,a32 MOVE.WMove Integer Word AGU MOVE.W a16,C4 MOVE.W C4,a16 MOVE.W Rn+Rr,DR MOVE.W DR,Rn+Rr MOVE.W Rn+u3,DR MOVE.W DR,Rn+u3MOVE.W Rn+s15,DR MOVE.W DR,Rn+s15 MOVE.W Rn,C3 MOVE.W C3,Rn Move.w d1,r7+4 MOVE.W a32,DR MOVE.W DR,a32 Write Sss0 Movet Rq,Rn MOVEc Conditional Address Register Move AGU MOVEc OperationMovet r0,r1 Movef 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 MOVES.F Move Fractional Word to Moves.f d0,r0 MOVES.F Db,a16 304 Memory With Scaling and Saturation AGU Operation MOVES.LMove Long to Moves.l d0,r0 MOVES.L Db,EA MOVEU.B Move Unsigned Byte fromMemory AGU Operation Assembler Syntax Moveu.b $0053,d10 MOVEU.B a16,DR 310 #u32 → Db MOVEU.LMoveu.l #$fffffff8,d3 MOVEU.L #u32,Db 31IIIIIIIIIIIIIIII16 #u16 → Db150 Moveu.w #$2345,d10.l#u16 → Db3116 MOVEU.W #u16,Db.H #u16 Iiiiiiiiiiiiiiii Bit unsigned immediate data MOVEU.W Move Unsigned Word fromMemory to a Register AGU Operation Moveu.w r7+2,d10 MOVEU.W a16,C4 318 Da.H * Db.H → Dn MPYMpy d4,d5,d6 MPY Da,Db,Dn Mpy d6,d6,d7 SC140 DSP Core Reference Manual 321 RndDa.H * Db.H → Dn MpyrMpyr d4,d5,d6 Mpyr Da,Db,Dn $0000 Register/Memory Address Before After L6D6 324 Dc.H * Dd.L → Dn MpysuMpysu d4,d5,d6 Mpysu Dc,Dd,Dn 326 Mpyus Dc.L * Dd.H → DnMpyus Dc,Dd,Dn 328 Dc.L * Dd.L → Dn MpyuuMpyuu d4,d5,d6 Mpyuu Dc,Dd,Dn 330 Neg d3 NEGNegate Dalu NEG Dn NEG Dn No operation NOPNo Operation Prefix Nop Not d4,d5 NotBitwise Complement Dalu ~Da → Dn 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 Da Dn → Dn Bitwise Inclusive or DaluExample or d3,d0 Or Da,Dn SC140 DSP Core Reference Manual 341 #u16 DR.H → DR.H Or #$0f0a,d0.l#u16 DR.L → DR.L Or #u16,DR.L Or #u16,DR.L Or #u16,DR.H OR.W #u16,SP+s16 OR.W #u16,RnOR.W #u16,SP-u5 OR.W #u16,a16 Or.w #$f01a,r1 OR.W #u16,Rn 346 POP De SP 8 → De SP 8 → SPSP 4 → Do SP 8 → SP POP Do Pop d3 Eeeee Extension Pairs, Even Registers, and Loop Start Registers NSP 8 → De NSP 8 → ΝSP NSP 4 → Do NSP 8 → ΝSP Popn d6.ed7.e Popn DePopn Do 352 Push De De → SP SP + 8 → SPDo → SP + 4 SP + 8 → SP Push Do Push d0.ed1.e SC140 DSP Core Reference Manual 355 Pushn De De → NSP NSP + 8 → ΝSPDo → NSP + 4 NSP + 8 → ΝSP Pushn Do Pushn d0.ed1.e Pushn De Pushn Do RndDa → Dn RNDRound Dalu RND Da,Dn Rnd d1,d5 Rnd d2,d1 RND Da,Dn Dn39 → C → Dn0 Rol d5Dn3801 → Dn391 ROL Dn ROL Dn → Dn39 Dn0 → C Ror d15Dn39-11 → Dn38-0 ROR Dn ROR Dn RTE SP 8 → PCSP 4 → SR SP 8 → SP → Nmid Rte Instruction Words Cycles1 Type Rted Example rted Trap Rts RTSReturn From Subroutine AGU If RAS valid, then RAS → PC RTS Rtsd Rtsd Rtsd Cleared Restore PC from Stack AGURtstk Register Address Bit Name Description EMR3 Example rtstk Rtstkd SP 8 → PCSP 8 → SP Example rtstkd If Da $007FFFFFFF then $007FFF0000 → Dn SAT.FSat.f d2,d3 SAT.F Da,Dn SAT.F Da,Dn SAT.L Sat.l d6SAT.L Dn SC140 DSP Core Reference Manual 381 Db Dc C → Dd SBCSubtract With Borrow Dalu SBC Dc,Dd SBC Dc,Dd Sbr d3,d0 SBRSubtract And Round Dalu RndDn Da → Dn 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 d1,d0,d2 SUBSubtract Dalu SUB #u5,Dn Sub d0,d1,d2 SC140 DSP Core Reference Manual 391 SUB2 Subtract Two 16-Bit Values DaluSub2 d0,d1 SUB2 Da,Dn Suba r1,r0 SubaSubtract AGU Suba #u5,Rx Suba Subl d0,d1 SublShift Left and Subtract Dalu Dn Da → Dn $0$FF Ffff Fffe Dn #s16 → Dn SUBNC.WSubnc.w #$15,d0 SUBNC.W #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 d15,d14 TFRTransfer Data Register to Data Register Dalu Tfr d7,d6 TFR Da,Dn Rx → Rx TfraTfra r0,r1 Tfra rx,Rx SC140 DSP Core Reference Manual 407 Else ESP → Rn If Srexp = Then Rn → NSP To/from a Register AGUIf Srexp = Then NSP → Rn Else Rn → ESP Tfra r0,osp If T=0, then Da → Dn Tfrt d14,d15If T=1, then Da → Dn Tfrt Da, Dn Tfrt Trap Execute a Software Exception AGU Trap Operation TRAPn Trap Tsteq d1 TsteqTest for Equal to Zero Dalu If Dn == 0, then 1 → T, else 0 → T Tsteqa.l r1 TSTEQA.x Test for Equal to Zero AGU TSTEQA.x OperationTsteqa.w r4 TSTEQA.W Rx TSTEQA.W TSTEQA.L Tstge d4 TstgeTest for Greater Than Or Equal to Zero Dalu If Dn = 0, then 1 → T, else 0 → T Tstgea.l r7 If Rx ≥ 0, then 1 → T, else 0 → TTESTGEA.L Rx TSTGEA.L Rx If Dn 0, then 1 → T, else 0 → Τ Tstgt Test for Greater Than Zero Dalu Tstgt OperationTstgt d6 Tstgt Dn If Rx 0, then 1 → T, else 0 → Τ Tstgta Test for Greater Than Zero AGU Tstgta OperationTstgta r2 Tstgta Rx VSL Word Big Endian ModeLittle Endian Mode Viterbi Shift Left Move AGU VSL.2W D1D3,Rn+N0 VSL.4W D2D6D1D3,Rn+N0VSL.4F D2D6D1D3,Rn+N0 VSL.2F D1D3,Rn+N0 Vsl.2w d1d3,r0+n0 After Little EndianAfter Big Endian VSL.4W State Enters the low-power standby Wait processingWait Response 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 Using the StarCore Registry Appendix B 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