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Texas Instruments TMS320C67X/C67X+ DSP manual Sshl .S1

Models: TMS320C67X/C67X+ DSP

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Shift Left With Saturation SSHL

	Pipeline
	Pipeline	Pipeline	E1
		Pipeline
		Stage

		Read	src1, src2
		Written	dst
		Unit in use	.S

Instruction Type	Single-cycle
Delay Slots	0
See Also	SHL, SHR
Example 1	SSHL .S1	A0,2,A1
Before instruction		1 cycle after instruction	2 cycles after instruction

A0	02E3	031Ch

A1 xxxx xxxxh

CSR 0001 0100h

A0

A1

CSR

02E3 031Ch

0B8C 0C70h

0001 0100h

A0

A1

CSR

02E3 031Ch

0B8C 0C70h

0001 0100h

Not saturated

Example 2	SSHL .S1	A0,A1,A2
Before instruction		1 cycle after instruction	2 cycles after instruction

A0

A1

A2

CSR

4719 1925h

0000 0006h

xxxxxxxxh

0001 0100h

A0

A1

A2

CSR

4719 1925h

0000 0006h

7FFF FFFFh

0001 0100h

A0

A1

A2

CSR

4719 1925h

0000 0006h

7FFF FFFFh

0001 0300h

Saturated

SPRU733

Instruction Set

3-233

Image 293

Texas Instruments TMS320C67X/C67X+ DSP manual Sshl .S1

Contents

TMS320C67x/C67x+ DSP CPU and Instruction Set Reference Guide Copyright 2005, Texas Instruments Incorporated Read This First Trademarks Contents Instruction Set Contents Vii Mvkl Move Signed Constant Into Register Pipeline Interrupts SPRU733 Figures −18 Tables 131 Tables Examples Introduction TMS320C6000 DSP Family Overview TMS320 DSP Family OverviewAutomotive Consumer Control −1. Typical Applications for the TMS320 DSPsGeneral-Purpose Graphics/Imaging Industrial Instrumentation Medical MilitaryTMS320C67x DSP Features and Options SPRU733 TMS320C67x DSP Features and Options TMS320C67x DSP Architecture −1. TMS320C67x DSP Block DiagramMemory and Peripheral Options Central Processing Unit CPUInternal Memory SPRU733 CPU Data Paths and Control General-Purpose Register Files Introduction−1. TMS320C67x CPU Data Paths Register Files Devices −1 -Bit/64-Bit Register Pairs−2. Functional Units and Operations Performed Functional UnitsMemory, Load, and Store Paths Register File Cross PathsControl Register File Data Address Paths−3. Control Registers Acronym Register Name SectionAcronym Register Name Address Read/ Write Register Addresses for Accessing the Control Registers−4. Register Addresses for Accessing the Control Registers Pipeline Stage Pipeline/Timing of Control Register AccessesBit Field Value Description Addressing Mode Register AMR−5. Addressing Mode Register AMR Field Descriptions B6 Mode BK n Value Block Size −6. Block Size Calculations−4. Control Status Register CSR Control Status Register CSRBit Field −7. Control Status Register CSR Field DescriptionsDCC −8. Interrupt Clear Register ICR Field Descriptions Interrupt Clear Register ICR−9. Interrupt Enable Register IER Field Descriptions Interrupt Enable Register IER−10. Interrupt Flag Register IFR Field Descriptions Interrupt Flag Register IFR−9. Interrupt Return Pointer Register IRP Interrupt Return Pointer Register IRP−11. Interrupt Set Register ISR Field Descriptions Interrupt Set Register ISR−11.Interrupt Service Table Pointer Register Istp Interrupt Service Table Pointer Register IstpNonmaskable Interrupt NMI Return Pointer Register NRP 12 E1 Phase Program Counter PCE1−13. Control Register File Extensions Floating-Point Adder Configuration Register FadcrControl Register File Extensions −14. Floating-Point Adder Configuration Register Fadcr NAN2 Inexact results status for .L1 −15. Floating-Point Auxiliary Configuration Register Faucr Floating-Point Auxiliary Configuration Register FaucrUND NaN select for .S2 src2 Signed infinity for .S1 −16. Floating-Point Multiplier Configuration Register Fmcr Floating-Point Multiplier Configuration Register FmcrInexact results status for .M2 Rounding mode select for .M1 Denormalized number select for .M1 src1 Topic Instruction Set−1. Instruction Operation and Execution Notations Symbol MeaningInstruction Operation and Execution Notations Rotl Occurs Extu l,r Greater than −2. Instruction Syntax and Opcode Notations Instruction Syntax and Opcode NotationsUcstn Bit unsigned constant field Ucst n SPRU733 Sdfpn −3. Ieee Floating-Point Notations−4. Special Single-Precision Values Symbol Sign s Exponent e Fraction f−2. Double-Precision Floating-Point Fields Symbol Hex Value Decimal Value−6. Special Double-Precision Values Delay Slots Instruction Type Slots Unit Latency Read Cycles† −8. Delay Slot and Functional Unit Latency−3. Basic Format of a Fetch Packet Parallel OperationsExample 3−2. Fully Parallel p-Bit Pattern in a Fetch Packet Example 3−1. Fully Serial p-Bit Pattern in a Fetch PacketCycle/Execute InstructionsCycle/Execute Packet Instructions Example Parallel CodeBranching Into the Middle of an Execute Packet −9. Registers That Can Be Tested by Conditional Operations Conditional OperationsSpecified Conditional Bit RegisterResource Constraints Constraints on Instructions Using the Same Functional UnitConstraints on Cross Paths 1X Following execute packets are valid Constraints on Loads and StoresFollowing code sequence is invalid Constraints on Long 40-Bit DataConstraints on Register Reads However, this code sequence is valid Constraints on Register WritesMPYSP2DP Constraints on Floating-Point InstructionsIntdp Tional unit on cycle i + 4, i + 5, or i + Addsp Subsp Spint Sptrunc Intsp Mpysp Addressing Modes Linear Addressing ModeExample 3−4. LDW Instruction in Circular Mode Circular Addressing ModeBefore LDW Cycle after LDW Cycles after LDWSyntax for Load/Store Address Generation Example 3−5. Addah Instruction in Circular ModeBefore Addah Cycle after Addah−10. Indirect Address Generation for Load/Store Mode Field Syntax Modification Performed−11. Address Generator Options for Load/Store Addressing Type Address RegisterInstruction Descriptions Instruction CompatibilityExample Way each instruction is describedOpcode map field used For operand type Unit Opfield Execution for .L1, .L2 and .S1, .S2 Opcodes Pipeline StageE1 Read src2 Written dst Unit in use Absolute Value With SaturationABS Before instruction ABSDP, AbsspCycle after instruction Before instruction Cycle after instructionAbsdp Absolute Value, Double-Precision Floating-PointPipeline Stage Read ABS, AbsspWritten Before instruction Cycles after instructionAbssp Absolute Value, Single-Precision Floating-PointABS, Absdp ADD Add Two Signed Integers Without SaturationADD Unit in use Or .D ADDDP, ADDK, ADDSP, ADDU, ADD2, SADD, SUBAdd Two Signed Integers Without Saturation ADD ADD, ADDAD, ADDAH, Addaw Add Using Byte Addressing ModeAddab Add Using Byte Addressing Mode Addab Addad Add Using Doubleword Addressing ModeADD, ADDAB, ADDAH, Addaw ADD, ADDAB, ADDAD, Addaw Add Using Halfword Addressing ModeAddah Add Using Halfword Addressing Mode Addah ADD, ADDAB, ADDAD, Addah Add Using Word Addressing ModeAddaw Add Using Word Addressing Mode Addaw Adddp Add Two Double-Precision Floating-Point ValuesAdd Two Double-Precision Floating-Point Values Adddp Unit in use Or .S ADD, ADDSP, ADDU, SubdpPipeline StageE1 Read cst16 Written dst Unit in use Add Signed 16-Bit Constant to RegisterAddk Addsp Add Two Single-Precision Floating-Point ValuesAdd Two Single-Precision Floating-Point Values Addsp ADD, ADDDP, ADDU, Subsp ADD, SADD, Subu Add Two Unsigned Integers Without SaturationAddu Addu Add Two Unsigned Integers Without Saturation ADD2 Add Two 16-Bit Integers on Upper and Lower Register HalvesADD, ADDU, SUB2 Bitwise OR, XOR S1, .S2 Branch Using a DisplacementOpcode map field used For operand type Unit Cycle Program Counter Value Action Delay Slots ExampleXuint Branch Using a RegisterWritten Branch Taken Unit in use Target Instruction Pipeline Stage ReadXsint Branch Using an Interrupt Return PointerIRP −15. Program Counter Values for B IRP Instruction NRP Branch Using NMI Return Pointer−16. Program Counter Values for B NRP Instruction CLR Clear a Bit FieldSET Execution PipelineClear a Bit Field CLR Cmpeq Compare for Equality, Signed IntegersCMPEQDP, CMPEQSP, CMPGT, Cmplt Cmpeqdp Compare for Equality, Double-Precision Floating-Point ValuesCmpeqdp .S1 Cmpeqsp Compare for Equality, Single-Precision Floating-Point ValuesCMPEQ, CMPEQDP, CMPGTSP, Cmpltsp Cmpgt Compare for Greater Than, Signed IntegersCMPEQ, CMPGTDP, CMPGTSP, CMPGTU, Cmplt Cmpgt .L1X Cmpgtdp Delay Slots Functional Unit Latency See Also Example Cmpgtsp CMPEQSP, CMPGT, CMPGTDP, CMPGTU, Cmpltsp Cmpgtu Compare for Greater Than, Unsigned IntegersCMPGT, CMPGTDP, CMPGTSP, Cmpltu Cmplt Compare for Less Than, Signed IntegersCmplt Compare for Less Than, Signed Integers Compare for Less Than, Signed Integers Cmplt Wise, 0 is written to dst CMPEQDP, CMPGTDP, CMPLT, CMPLTSP, Cmpltu Cmpltsp Cmpltsp .S1 A1,A2,A3 Cmpltu Compare for Less Than, Unsigned IntegersInstruction Type Single-cycle Delay Slots See Also Example Dpint Convert Double-Precision Floating-Point Value to IntegerExample DpintFloating-Point Value DpspDPINT, DPTRUNC, INTSP, Spdp With Truncation DptruncDPINT, DPSP, Sptrunc DptruncEXT Extract and Sign-Extend a Bit FieldIf cond src2 ext csta, cstb → dst else nop Extu Extu Extract and Zero-Extend a Bit FieldIf cond src2 extu csta, cstb → dst else nop EXT Idle Multicycle NOP With No Termination Until InterruptIdle DPINT, INTDPU, INTSP, Intspu IntdpIntdp INTDP, INTSP, Intspu IntdpuIntdpu INTDP, INTDPU, Intspu IntspINTDP, INTDPU, Intsp IntspuRegister Offset Ldbu−17. Data Types Supported by Ldbu Instruction Left ShiftLDH, LDW Cycles after LDB Before LDBCycle after LDB −18. Data Types Supported by Ldbu Instruction 15-Bit Offset Load Byte From Memory With a 15-Bit Unsigned Constant OffsetBefore LDB Cycle after LDB Pipeline Stage Read B14 / B15 WrittenOr Register Offset LddwExecution Pipeline Instruction Type LDB, LDH, LDW −19. Data Types Supported by Ldhu Instruction LdhuLDB, LDW Cycles after LDH Before LDHCycle after LDH Tion operates only on the .D2 unit −20. Data Types Supported by Ldhu Instruction 15-Bit Offset LDW LDB, LDDW, LDH Cycle after LDW LDW LDB, LDH Leftmost Bit Detection Lmbd→ dst MPY Multiply Signed 16 LSB y Signed 16 LSBMPYU, MPYSU, MPYUS, Smpy Pipeline StageE1 E2 ReadMPY Multiply Signed 16 LSB x Signed 16 LSB Mpydp Multiply Two Double-Precision Floating-Point ValuesPipeline E10 Stage Read MPY, MpyspMPYHU, MPYHSU, MPYHUS, Smpyh Multiply Signed 16 MSB y Signed 16 MSBMpyh Multiply Signed 16 MSB x Signed 16 MSB MPYHLU, MPYHSLU, MPYHULS, Smpyhl Multiply Signed 16 MSB y Signed 16 LSBMpyhl Mpyhl Multiply Signed 16 MSB x Signed 16 LSB MPYHL, MPYHSLU, Mpyhuls Multiply Unsigned 16 MSB y Unsigned 16 LSBMPYHL, MPYHLU, Mpyhuls MpyhsluMultiply Signed 16 MSB y Unsigned 16 LSB MPYH, MPYHU, Mpyhus Multiply Signed 16 MSB y Unsigned 16 MSBMPYH, MPYHSU, Mpyhus MpyhuMultiply Unsigned 16 MSB y Unsigned 16 MSB MPYHL, MPYHLU, Mpyhslu Multiply Unsigned 16 MSB y Signed 16 LSBMpyhuls MPYH, MPYHU, Mpyhsu Multiply Unsigned 16 MSB y Signed 16 MSBMpyi Multiply 32-Bit y 32-Bit Into 32-Bit ResultMpyi Mpyid Mpyid Multiply 32-Bit y 32-Bit Into 64-Bit ResultMpyid Multiply 32-Bit x 32-Bit Into 64-Bit Result MPYLHU, MPYLSHU, MPYLUHS, Smpylh Multiply Signed 16 LSB y Signed 16 MSBMpylh Mpylh Multiply Signed 16 LSB x Signed 16 MSB MPYLH, MPYLSHU, Mpyluhs Multiply Unsigned 16 LSB y Unsigned 16 MSBMPYLH, MPYLHU, Mpyluhs MpylshuMultiply Signed 16 LSB y Unsigned 16 MSB MPYLH, MPYLHU, Mpylshu Multiply Unsigned 16 LSB y Signed 16 MSBMpyluhs Mpysp Multiply Two Single-Precision Floating-Point ValuesMPY, MPYDP, MPYSP2DP MpyspMpyspdp MPY, MPYDP, MPYSP, MPYSP2DP MpyspdpDouble-Precision Result Multiply Two Single-Precision Floating-Point Values forMPYSP2DP MPYSP2DP Multiply Signed 16 LSB y Unsigned 16 LSB MpysuMPY, MPYU, Mpyus MPY, MPYSU, Mpyus Multiply Unsigned 16 LSB y Unsigned 16 LSBMultiply Unsigned 16 LSB x Unsigned 16 LSB Mpyu MPY, MPYU, Mpysu MpyusMultiply Unsigned 16 LSB y Signed 16 LSB Multiply Unsigned 16 LSB x Signed 16 LSB Mpyus Move From Register to Register If cond 0 + src2 → dst MVC Move Between Control File and Register FileSrc2 → dst −21. Register Addresses for Accessing the Control Registers Pipeline StageE1 Read Written dst Unit in use Move Signed Constant Into Register and Sign ExtendMVK MVKH, MVKL, Mvklh MVKH/MVKLH Move 16-Bit Constant Into Upper Bits of RegisterIf you are loading the address of a label, use Mvkl Pipeline Stage Read Written MVK, MVKH, MvklhNEG NegateUcst4 None No OperationNOP Cycle after NOP Before NOPNo operation Executes Cycle after ADDNorm Normalize IntegerExecution If cond Norm src → dst Else nop Pipeline Not Bitwise notBitwise or AND, XOR Src1 or src2 → dstRcpdp Double-Precision Floating-Point Reciprocal ApproximationRCPSP, Rsqrdp Rcpsp Single-Precision Floating-Point Reciprocal ApproximationRCPDP, Rsqrsp Rsqrdp If src2 is positive infinity, positive 0 is placed in dst Rsqrsp Rsqrsp .S1 Sadd Add Two Signed Integers With SaturationADD, Ssub Add Two Signed Integers With Saturation Sadd SAT Saturate a 40-Bit Integer to a 32-Bit IntegerSAT .L2 SET Set a Bit FieldCLR If cond src2 SET csta, cstb → dst else nopSET .S1 SHL Arithmetic Shift LeftSHR, Sshl SHR Arithmetic Shift RightSHL, Shru Shru Logical Shift RightSHL, SHR MPY, SMPYH, SMPYHL, Smpylh SmpyCSR MPYH, SMPY, SMPYHL, Smpylh SmpyhMPYHL, SMPY, SMPYH, Smpylh SmpyhlInstruction Set 223 MPYLH, SMPY, SMPYH, Smpyhl SmpylhInstruction Set 225 Spdp DPSP, INTDP, SPINT, Sptrunc Spint Convert Single-Precision Floating-Point Value to IntegerDPINT, INTSP, SPDP, Sptrunc SpintSptrunc DPTRUNC, SPDP, Spint SptruncSshl Shift Left With SaturationSshl .S1 Ssub Subtract Two Signed Integers With SaturationSUB STB Before Cycle after Instruction STH, STWStore Byte to Memory With a 15-Bit Unsigned Constant Offset Pipeline Stage Read B14 /B15 , src Written Unit in use STH Before STB, STWInstruction Cycles after STH Instruction Type Store Delay Slots See Also STW STB, STH Store Word to Memory With a 15-Bit Unsigned Constant Offset 248 SUB Subtract Two Signed Integers Without SaturationSrc1 − src2 → dst else nop Src2 − src1 → dst ADD, SSUB, SUBC, SUBDP, SUBSP, SUBU, SUB2 SUB, SUBAH, Subaw Subtract Using Byte Addressing ModeSubab BK0 = 3 → size = A5 in circular addressing mode using BK0 SUB, SUBAB, Subaw Subtract Using Halfword Addressing ModeSubah SUB, SUBAB, Subah Subtract Using Word Addressing ModeSubaw Subtract Using Word Addressing Mode Subaw ADD, SSUB, SUB, SUBDP, SUBSP, SUBU, SUB2 Subtract Conditionally and Shift-Used for DivisionSubc Subtract Conditionally and Shift−Used for Division Subc Subdp Subtract Two Double-Precision Floating-Point ValuesSubtract Two Double-Precision Floating-Point Values Subdp ADDDP, SUB, SUBSP, Subu Subsp Subtract Two Single-Precision Floating-Point ValuesSubsp Subtract Two Single-Precision Floating-Point Values ADDSP, SUB, SUBDP, Subu ADDU, SSUB, SUB, SUBC, SUBDP, SUBSP, SUB2 Subtract Two Unsigned Integers Without SaturationSubu Subtract Two Unsigned Integers Without Saturation Subu Src1 and placed in the lower-half of dst SUB2ADD2, SSUB, SUB, SUBC, Subu XOR Bitwise Exclusive orAND, or Zero Zero a RegisterPipeline Fetch Pipeline Operation OverviewDecode −2. Fetch Phases of the Pipeline−3. Decode Phases of the Pipeline Execute −4. Execute Phases of the PipelineClock cycle Fetch Pipeline Operation Summary−1. Operations Occurring During Pipeline Phases Stage Phase Symbol During This Phase Completed Adddp −7. Pipeline Phases Block Diagram Example 4−1. Execute Packet in −7 Pipeline Execution of Instruction Types Delay slots Functional Unit latencyDP Compare Instruction Type Execution Phases Cycle DPADDDP/SUBDP Mpyi Mpyid Mpydp Instruction Type Execution PhasesInstruction Type Execution PhasesUnit in use M, or .D Single-Cycle Instructions−3. Single-Cycle Instruction Execution −4 y 16-Bit Multiply Instruction Execution 2 16 y 16-Bit Multiply Instructions−5. Store Instruction Execution Store Instructions−13. Store Instruction Execution Block Diagram −6. Load Instruction Execution Load Instructions−15. Load Instruction Execution Block Diagram −7. Branch Instruction Execution Branch Instructions−17. Branch Instruction Execution Block Diagram −8. Two-Cycle DP Instruction Execution Two-Cycle DP InstructionsUnit in use Or .M Four-Cycle Instructions−9. Four-Cycle Instruction Execution −10. Intdp Instruction Execution Intdp Instruction−11. DP Compare Instruction Execution DP Compare Instructions−12. ADDDP/SUBDP Instruction Execution ADDDP/SUBDP Instructions−13. Mpyi Instruction Execution Mpyi InstructionPipeline Stage E4 E5 E6 E7 E8 E9 E10 Read Mpyid Instruction−14. Mpyid Instruction Execution −15. Mpydp Instruction Execution Mpydp Instruction−16. Mpyspdp Instruction Execution Mpyspdp Instruction−17. MPYSP2DP Instruction Execution Functional Unit ConstraintsMPYSP2DP Instruction Instruction Execution Unit Constraints−18. Single-Cycle .S-Unit Instruction Constraints −19. DP Compare .S-Unit Instruction Constraints −20 -Cycle DP .S-Unit Instruction Constraints −21. ADDSP/SUBSP .S-Unit Instruction Constraints −22. ADDDP/SUBDP .S-Unit Instruction Constraints −23. Branch .S-Unit Instruction Constraints −24 y 16 Multiply .M-Unit Instruction Constraints −25 -Cycle .M-Unit Instruction Constraints −26. Mpyi .M-Unit Instruction Constraints −27. Mpyid .M-Unit Instruction Constraints −28. Mpydp .M-Unit Instruction Constraints −29. Mpysp .M-Unit Instruction Constraints −30. Mpyspdp .M-Unit Instruction Constraints −31. MPYSP2DP .M-Unit Instruction Constraints −32. Single-Cycle .L-Unit Instruction Constraints −33 -Cycle .L-Unit Instruction Constraints −34. Intdp .L-Unit Instruction Constraints −35. ADDDP/SUBDP .L-Unit Instruction Constraints −36. Load .D-Unit Instruction Constraints Unit Instruction Constraints−37. Store .D-Unit Instruction Constraints −38. Single-Cycle .D-Unit Instruction Constraints Lddw Performance Considerations Pipeline Stall −29. Multicycle NOP in an Execute Packet Multicycle NOPsCycle # Pipeline Phase Branch TargetMemory Considerations −40. Program Memory Accesses Versus Data Load AccessesData Load Operation+10 −32. Program and Data Memory StallsExample 4−2. Load From Memory Banks −33 -Bank Interleaved Memory−34 -Bank Interleaved Memory With Two Memory Spaces −41. Loads in Pipeline from Example 4−2Interrupts Overview Types of Interrupts and Signals UsedPriority Interrupt Name Interrupt Type −1. Interrupt PrioritiesNonmaskable Interrupt NMI Interrupt Acknowledgment Iack and Interrupt Number INUMn −1. Interrupt Service Table Interrupt Service Table IST−2. Interrupt Service Fetch Packet 1238h Interrupt Service Table Pointer Istp Example 5−1. Relocation of Interrupt Service TableAcronym Register Name Description Summary of Interrupt Control Registers−2. Interrupt Control Registers Globally Enabling and Disabling Interrupts MVC CSR,B0 Enabling and Disabling Interrupts Individual Interrupt ControlStatus of Interrupts Setting and Clearing InterruptsExample 5−9. Code to Return from a Maskable Interrupt Returning From Interrupt ServicingExample 5−8. Code to Return From NMI Interrupt Detection and Processing Setting the Nonreset Interrupt FlagConditions for Processing a Nonreset Interrupt Isfp Actions Taken During Nonreset Interrupt Processing PS PW PR DP DC Setting the Reset Interrupt FlagActions Taken During Reset Interrupt Processing Pipeline Interaction General PerformanceSingle Assignment Programming Programming ConsiderationsNested Interrupts Example 5−11. Code Using Single AssignmentSTW Example 5−14. Manual Interrupt Processing Manual Interrupt ProcessingExample 5−16. Code Sequence for Trap Return TrapsExample 5−15. Code Sequence to Invoke a Trap Instruction C62x DSP C64x DSP C67x DSP C67x+ DSP Instruction CompatibilityCmpltu Intsp Mpylh Rsqrdp Subab Functional Unit Instruction Table B−1. Functional Unit to Instruction MappingDisplacement Register Intdp Intdpu Intsp Intspu N n n n n n n n n n n n n STB memory SUB Subab Subah Subaw Subc Subdp Subsp Subu SUB2 XOR Zero Unit Instructions and Opcode Maps Table C−1. Instructions Executing in the .D Functional Unit Instructions Executing in the .D Functional UnitTable C−2. .D Unit Opcode Map Symbol Definitions Opcode Map Symbols and MeaningsSyntax Modification Performed Table C−3. Address Generator Options for Load/StoreFigure C−1 or 2 Sources Instruction Format 32-Bit Opcode MapsAppendix D Table D−1. Instructions Executing in the .L Functional Unit Instructions Executing in the .L Functional UnitTable D−2. .L Unit Opcode Map Symbol Definitions Figure D−1 or 2 Sources Instruction Format Appendix E Table E−1. Instructions Executing in the .M Functional Unit Instructions Executing in the .M Functional UnitTable E−2. .M Unit Opcode Map Symbol Definitions Figure E−1. Extended M-Unit with Compound Operations Appendix F Table F−1. Instructions Executing in the .S Functional Unit Instructions Executing in the .S Functional UnitTable F−2. .S Unit Opcode Map Symbol Definitions Figure F−1 or 2 Sources Instruction Format Figure F−7. Branch with NOP Constant Instruction Format No Unit Specified Instructions and Opcode Maps Table G−1. Instructions Executing With No Unit Specified Instructions Executing With No Unit SpecifiedFigure G−1. Loop Buffer Instruction Format Index Cmpeqdp Dpsp Index-4 Reset Index-6 Mpysu Unit No unit instructions Rsqrdp To memory with a 15-bit unsigned constant offset STB 260 Single-precision Subsp 263