book

32/64-Bit 80x86 Assembly Language Architecture

Name: 32/64-Bit 80x86 Assembly Language Architecture
Author: James Leiterman
ISBN: 9781449612702

by James Leiterman

August 2005

Intermediate to advanced

545 pages

9h 35m

English

Jones & Bartlett Learning

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Copyright
Preface
1. Introduction
Conventions Used in This BookCompanion CodeImage PatterningProcessor LegendNotes, Tips, and HintsPseudo VecPseudo Vec (x86) (3DNow!) (3DNow!+) (MMX) (MMX+) (SSE) (SSE2) (SSE3)Graphics 101 (x86) (3DNow!) (MMX)Algebraic LawI-VU-Q
2. Coding Standards
ConstantsData AlignmentStacks and Vectors3D Vector (Floating-Point)3D Quad Vector (Floating-Point)Compiler DataAssertionsMemory SystemsRamTest Memory Alignment TestMemory HeaderAllocate Memory (Malloc Wrapper)Release Memory (Free Wrapper)Allocate MemoryAllocate (Cleared) MemoryFree Memory — Pointer Is Set to NULLExercises
3. Processor Differential Insight
Processor OverviewHistoryThe 64-Bit Processor80x86 RegistersGeneral-Purpose RegistersREXSegment/Selector RegistersMMX RegistersXMM RegistersCPU Status Registers (EFLAGS/64-Bit RFLAGS)LAHF — Load AH FlagsSAHF — Save AH FlagsPUSHF/PUSHFD — Push EFLAGS onto StackPUSHFQ — Push RFLAGS onto StackPOPF/POPFD — Pop EFLAGS from StackPOPFQ — Pop RFLAGS from StackCLC — Clear (Reset) Carry FlagSTC — Set Carry FlagCMC — Complement Carry FlagNOP — No OperationFloating-Point 101Processor Data Type EncodingEMMS — Enter/Leave MMX StateFEMMS — Enter/Leave MMX StateDestination/Source OrientationsBig/Little-EndianAlignment Quickie(Un)aligned Memory AccessMOV/MOVQ — Move DataMove (Unaligned)Move (Aligned)Misaligned SSE(2) (128-bit)Aligned SSE(2) (128-bit)XCHG — Exchange (Swap) DataSystem Level FunctionalityIndirect Memory Addressinguint32 OddTable[ ]LEA — Load Effective AddressTranslation TableXLAT/XLATB — Translation Table LookupString InstructionsLODSB/LODSW/LODSD/LODSQ — Load StringREP LODSxSTOSB/STOSW/STOSD/STOSQ — Save StringREP/REPE/REPZ/REPNE/REPNZ — Repeat StringREP STOSxMOVSB/MOVSW/MOVSD/MOVSQ — Move StringREP MOVSxCLD/STD — Clear/Set Direction FlagSpecial (Non-Temporal) Memory InstructionsMOVNTx — Copy Using Non-Temporal HintMOVNTPS — Copy 4 × SPFP Using Non-Temporal HintMOVNTPD — Copy 2×DPFP Using Non-Temporal HintMASKMOVQ/MASKMOVDQU — Copy Selected BytesExercises
4. Bit Mangling
Boolean Logical ANDPseudo VecLogical Packed AND D=(AB)vmp_pand (x86) 32-bitvmp_pand (x86) 64-bitvmp_pand (MMX)vmp_pand (SSE2) Aligned Memoryvmp_pand (SSE2) Unaligned MemoryBoolean Logical ORPseudo VecLogical Packed OR D=(AB)Boolean Logical XOR (Exclusive OR)Pseudo VecLogical Packed XOR D=(AB)NOT — One's Complement NegationNEG — Two's Complement NegationToolBox Snippet — The Butterfly SwitchI-VU-QBoolean Logical ANDCPseudo VecLogical Packed ANDC D=(AB′)Exercises
5. Bit Wrangling
Logical Left ShiftingSHL/SAL - Shift (Logical/Arithmetic) LeftSHLD — Shift (Logical) Left (Double)PSLLx — Parallel Shift Left (Logical)Pseudo VecPacked Shift Left Logical 16×8-bit by n:{0...7}Pseudo Vec (x86)vmp_psllB (MMX) 16×8-bit VectorLogical Right ShiftingSHR — Shift (Logical) RightSHRD — Shift (Logical) Right (Double)PSRLx — Parallel Shift Right (Logical)Pseudo VecPacked Shift Right Logical 16×8-bit by n:{0...7}Arithmetic Right ShiftingSAR — Shift (Arithmetic) RightPSRAx — Packed Shift Right (Arithmetic)Pseudo VecRotate Left (or n-Right)ROL — Rotate LeftRCL — Rotate Carry LeftRotate RightROR — Rotate RightRCR — Rotate Carry RightBit ScanningBSF — Bit Scan ForwardBSR — Bit Scan ReverseToolBox Snippet — Get Bit CountGraphics 101 — Palette BitsExercises
6. Data Conversion
Data Interlacing, Exchanging, Unpacking, and MergingByte SwappingLittle-Endian(Big/Little)-Endian to (Big/Little)-Endian Data Relationship MacrosBSWAP — Byte SwapPSWAPD — Packed Swap Double WordData InterlacingPUNPCKLBW — Parallel Extend Lower from BytePUNPCKHBW — Parallel Extend Upper from BytePUNPCKLWD — Parallel Extend Lower from 16-BitPUNPCKHWD — Parallel Extend Upper from 16-BitPUNPCKLDQ — Parallel Extend Lower from 32-BitAlso: (Unpack and Interleave Low Packed SPFP)PUNPCKHDQ — Parallel Extend Upper from 32-BitALSO: (Unpack and Interleave High Packed SPFP)MOVSS — Move Scalar (SPFP)MOVQ2DQ — Move Scalar (1×32-Bit) MMX to XMMMOVDQ2Q — Move Scalar (1×32-bit) XMM to MMXMOVLPS — Move Low Packed (2×SPFP)MOVHPS — Move High Packed (2×SPFP)MOVLHPS — Move Low to High Packed (2×SPFP)MOVHLPS — Move High to Low Packed (2×SPFP)MOVSD — Move Scalar (1×DPFP)MOVLPD — Move Low Packed (1×DPFP)MOVHPD — Move High Packed (1×DPFP)PUNPCKLQDQ — Parallel Copy Lower (2×64-Bit)Also: (Unpack and Interleave Low Packed Double-Precision Floating-Point Values)PUNPCKHQDQ — Parallel Copy Upper (2×64-Bit)Also: (Unpack and Interleave High Packed Double-Precision Floating-Point Values)Swizzle, Shuffle, and SplatPINSRW — Shuffle (1×16-Bit) to (4×16-Bit)PSHUFW — Shuffle Packed Words (4×16-Bit)PSHUFLW — Shuffle Packed Low Words (4×16-Bit)PSHUFHW — Shuffle Packed High Words (4×16-Bit)PSHUFD — Shuffle Packed Double Words (4×32-Bit)SHUFPS — Shuffle Packed SPFP Values (4×SPFP)MOVSLDUP — Splat Packed Even SPFP to (4×SPFP)MOVSHDUP — Splat Packed Odd SPFP to (4×SPFP)MOVDDUP — Splat Lower DPFP to Packed (2×DPFP)SHUFPD — Shuffle Packed DPFP (2×64-Bit)Data Bit ExpansionCBW Convert Signed AL (Byte) to AX (Word)CWDE Convert Signed AX (Word) to EAX (DWord)CDQE Convert Signed EAX (DWord) to RAX (QWord)MOVSX/MOVSXD — Move with Sign ExtensionMOVZX — Move with Zero ExtensionCWD — Convert Signed AX (Word) to DX:AXCDQ — Convert Signed EAX (DWord) to EDX:EAXCQO — Convert Signed RAX (QWord) to RDX:RAXPEXTRW — Extract (4×16-bit) into Integer to (1×16)Data Bit Reduction (with Saturation)PACKSSWB — Packed Signed int16 to int8 with SaturationPACKUSWB — Packed uint16 to uint8 with SaturationPACKSSDW — Packed int32 to int16 with SaturationData Conversion (Integer : Float, Float : Integer, Float : Float)PI2FW — Convert Packed Even int16 to SPFPCVTDQ2PS — Convert Packed int32 to SPFPCVTPS2DQ — Convert Packed SPFP to int32CVTPI2PS — Convert Lo Packed int32 to SPFPCVTPS2PI — Convert Lo Packed SPFP to int32CVTSI2SS — Convert Scalar int32 to SPFPCVTDQ2PD — Convert Even Packed int32 to DPFPCVTPD2DQ — Convert Packed DPFP to Even int32CVTPD2PS — Convert Packed DPFP to Lo SPFPCVTPS2PD — Convert Lo Packed SPFP to DPFPCVTPD2PI — Convert Packed DPFP to int32CVTPI2PD — Convert Packed int32 to DPFPCVTSS2SI — Convert Scalar SPFP to int32/64CVTSD2SI — Convert Scalar DPFP to IntCVTSI2SD — Convert Scalar Int to DPFPCVTSD2SS — Convert Scalar DPFP to SPFPCVTSS2SD — Convert Scalar SPFP to DPFPExercises
7. Interger Math
General Integer MathADD — AddADC — Add with CarryINC — Increment by 1Thread-Safe IncrementXADD — Exchange and AddSUB — SubtractSBB — Subtract with BorrowDEC — Decrement by 1Thread-Safe DecrementPacked Addition and SubtractionPADDB/PADDW/PADDD/PADDQ Integer AdditionVector_{8/16/32/64}-Bit_Int_Addition_with_SaturationPSUBB/PSUBW/PSUBD/PSUBQ Integer SubtractionVector {8/16/32/64}-Bit Integer Subtraction with SaturationVector Addition and Subtraction (Fixed Point)Pseudo VecPseudo Vec (x86)vmp_paddB (MMX) 16×8-Bitvmp_paddB (SSE2) 16×8-BitAveragesPAVGB/PAVGUSB — N×8-Bit [Un]signed Integer AveragePAVGW — N×16-Bit [Un]signed Integer AverageSum of Absolute DifferencesPSADBW — N×8-Bit Sum of Absolute DifferencesInteger MultiplicationMUL — Unsigned Muliplication (Scalar)IMUL — Signed Multiplication (Scalar)Packed Integer MultiplicationPMULLW — N×16-Bit Parallel Multiplication (Lower)PMULHW/PMULHUW — N×16-Bit Parallel Multiplication (Upper)PMULHRW — Signed 4×16-Bit Multiplication with Rounding (Upper)Pseudo Vec (x86)(MMX Mul Low) 4×16-Bit(SSE2 Mul Low) 8×16-BitPMULUDQ — Unsigned N×32-Bit Multiply EvenPMADDWD — Signed N×16-Bit Parallel Multiplication — ADDInteger DivisionDIV — Unsigned DivisionIDIV — Signed DivisionExercises
8. Floating-Point Anyone?
The Floating-Point NumberFPU RegistersLoading/Storing Numbers and the FPU StackFLD — Floating-Point LoadFST/FSTP — FPU Floating-Point SaveFILD — FPU Integer LoadFIST/FISTP/FISTTP — FPU Integer SaveFPU ConstantsFXCHFINCSTP — FPU Increment Stack PointerFDECSTP — FPU Decrement Stack PointerFWAIT/WAITEMMS/FEMMSFNOPGeneral Math InstructionsFCHS — FPU Two's Complement ST(0) = – ST(0)FABS — FPU Absolute Value ST(0) = |ST(0)|FADD/FADDP/FIADD — FPU Addition D = ST(0) + AFSUB/FSUBP/FISUB — FPU Subtraction D = ST(0) – AFSUBR/FSUBRP/FISUBR — FPU Reverse Subtraction D = A – ST(0)FMUL/FMULP/FIMUL — FPU Multiplication D = ST(0) × AFDIV/FDIVP/FIDIV — FPU Division D = Dst ÷ SrcFDIVR/FDIVRP/FIDIVR — FPU Reverse Division D = Src ÷ DstFPREM — FPU Partial RemainderFPREM1 — FPU Partial RemainderFRNDINT — FPU Round to IntegerAdvanced Math InstructionsFSQRT — FPU ST(0) Square RootFSCALE — FPU Scale ST(0) = ST(0) << ST(1)F2XM1 — FPU ST(0) = 2ST(0) – 1FYL2X — FPU ST(0) = y log2xFYL2XP1 — FPU ST(0) = y log2(x+1)FXTRACT — FPU Extract Exponent and SignificandFloating-Point ComparisonFTST — FPU Test If ZeroFCOM/FCOMP/FCOMPP — FPU Unordered CMP FPFUCOM/FUCOMP/FUCOMPP — FPU Unordered CMP FPFCOMI/FCOMIP/FUCOMI/FUCOMIP — FPU A ? B and EFLAGSFICOM/FICOMP — FPU A ? BFCMOVcc — FPU Conditional MoveFXAM — FPU ExamineFPU BCD (Binary-Coded Decimal)FBLD — FPU (BCD Load)FBSTP — FPU (BCD Save and Pop ST(0))FPU TrigonometryFPTAN — FPU Partial TangentFPATAN — FPU Partial ArctangentFSINCOS — Sine and CosinePseudo VecPseudo Vec (x86)AMD-SDK3DSMax-SDKFSIN — FPU SineFCOS — FPU CosineFSINCOS — FPU Sine and Cosinevmp_SinCos (3DNow!)FPU System InstructionsFINIT/FNINIT — FPU InitFCLEX/FNCLEX — FPU Clear ExceptionsFFREE — FPU Free FP RegisterFSAVE/FNSAVE — FPU Save X87 FPU, MMX, SSE, SSE2FRSTOR — FPU Restore x87 StateFXSAVE — FPU Save x87 FPU, MMX, SSE, SSE2, SSE3FXRSTOR — FPU Restore x87 FPU, MMX, SSE, SSE2, SSE3FSTENV/FNSTENV — FPU Store x87 EnvironmentFLDENV — FPU Load x87 EnvironmentFSTCW/FNSTCW — FPU Store x87 Control WordFLDCW — FPU Load x87 Control WordFSTSW/FNSTSW — FPU Store x87 Status WordValidating (Invalid) Floating-PointExercises

9. Comparison
TEST — Logical Compare A BIndexed Bit TestingBT — Bit TestBTC — Bit Test and ComplementBTR — Bit Test and Reset (Clear)BTS — Bit Test and SetSETcc — Set Byte on ConditionComparing Operands and Setting EFLAGSCMP — Compare Two OperandsCOMISS — Compare Scalar SPFP, Set EFLAGSCOMISD — Compare Scalar DPFP, Set EFLAGSUCOMISS — Unordered Cmp Scalar SPFP, Set EFLAGSUCOMISD — Unordered Cmp Scalar DPFP, Set EFLAGSCMPSB/CMPSW/CMPSD/CMPSQ — Compare String OperandsCMP — Packed ComparisonCMPPS/CMPSS/CMPPD/CMPSD —Floating-PointPacked Compare if Equal to (=)Packed Compare if Greater Than or Equal (≥)Packed Compare if Greater Than (>)Extract Packed Sign MasksPMOVMSKB — Extract Packed Byte (Sign) MaskMOVMSKPS — Extract Packed SPFP Sign MaskMOVMSKPD — Extract Packed DPFP Sign MaskSCAS/SCASB/SCASW/SCASD/SCASQ —Scan StringREP SCASxCMOVcc — Conditional MoveCMPXCHG — Compare and ExchangeCMPXCHG8B — Compare and Exchange 64 BitsCMPXCHG16B — Compare and Exchange 128 BitsBoolean Operations upon Floating-Point NumbersANDPS — Logical AND of Packed SPFP D = A BANDPD — Logical AND of Packed DPFPPseudo Vec — (XMM) FABS — FP Absolute A = | A |Pseudo Vec — (3DNow!) FABS — FP Absolute A = | A |ORPS — Logical OR of Packed SPFP D = A BORPD — Logical OR of Packed DPFPXORPS — Logical XOR of Packed SPFP D = A BXORPD — Logical XOR of Packed DPFPPseudo Vec — FCHS — FP Change Sign A = – APseudo Vec (XMM)Pseudo Vec — (3DNow!)ANDNPS — Logical ANDC of Packed SPFP D = A (¬B)ANDNPD — Logical ANDC of Packed DPFPMin — MinimumPseudo VecN×8-Bit Integer MinimumN×16-Bit Integer MinimumN×SPFP Minimum1×SPFP Scalar Minimum2×DPFP Minimum1×DPFP Scalar MinimumMax — MaximumN×8-Bit Integer MaximumN×16-Bit Integer MaximumN×SPFP Maximum1×SPFP Scalar Maximum2×DPFP Maximum1×DPFP Scalar Maximum
10. Branching
Jump UnconditionallyJMP — JumpDelta JMPProtected Mode JMP (NEAR)Protected Mode JMP (FAR)Real Mode JMP (NEAR)Real Mode JMP (FAR)Delta JMPProtected Mode JMP (NEAR)Protected Mode JMP (FAR)Real Mode — NEAR or FAR has Same OpcodesProtected Mode — NEAR or FAR has Same OpcodesReal Mode — NEAR or FAR has Same OpcodesProtected Mode — NEAR or FAR has Same OpcodesJump ConditionallyJcc — BranchingDelta JMPBranch PredictionIntel Branch PredictionStatic Branch PredictionBack-Branch-TakenForward-Branch-Not-TakenBranching HintsAMD Branch PredictionBranch OptimizationPAUSE — (Spin Loop Hint)I-VU-QJECXZ/JCXZ — Jump if ECX/CX Is ZeroLOOPccLOOPPancake Memory LIFO QueueStackPUSH — Push Value onto StackPOP — Pop Value off StackPUSHA/PUSHAD — Push All General-Purpose RegistersPOPA/POPAD — Pop All General-Purpose RegistersPUSHFD/PUSHFQ and POPFD/POPFQENTER — Allocate Stack Frame for Procedure ARGSLEAVE — Deallocate Stack Frame of Procedure ARGSCALL Procedure (Function)CALLDelta CALLProtected Mode CALL (NEAR)Protected Mode CALL (FAR)Real Mode CALL (FAR)Protected Mode CALL (NEAR)Protected Mode CALL (FAR)Real Mode — NEAR or FAR has Same OpcodesProtected Mode — NEAR or FAR has Same OpcodesReal Mode — NEAR or FAR has Same OpcodesProtected Mode — NEAR or FAR has Same OpcodesRET/RETF — ReturnCalling Conventions (Stack Argument Methods)C Declaration (_CDECL)Standard Declaration (_STDCALL)Fast Call Declaration (_FASTCALL)Interrupt HandlingINT/INTO - Call Interrupt ProcedureIRET/IRETD/IRETQ — Interrupt ReturnCLI/STI — Clear (Reset)/Set Interrupt Flag
11. Branchless
Function y=ABS(x) 'Absolute' D = | A |Function y=MIN(p, q) 'Minimum'Function y=MAX(p, q) 'Maximum'Graphics 101 — Quick 2D Distance
12. Floating-Point Vector Addition and Subtraction
Floating-Point Vector Addition and SubtractionVector Floating-Point AdditionVector Floating-Point Addition with ScalarVector Floating-Point SubtractionVector Floating-Point Subtraction with ScalarVector Floating-Point Reverse SubtractionPseudo VecSingle-Precision Float AdditionSingle-Precision Float SubtractionSingle-Precision Vector Float AdditionSingle-Precision Vector Float SubtractionSingle-Precision Quad Vector Float AdditionSingle-Precision Quad Vector Float SubtractionPseudo Vec (×86)vmp_VecAdd (3DNow!)vmp_VecSub (3DNow!)vmp_QVecAdd (3DNow!)vmp_VecAdd (SSE) Unalignedvmp_VecAdd (SSE) Alignedvmp_QVecAdd (SSE) AlignedVector Scalar Addition and SubtractionSingle-Precision Quad Vector Float Scalar AdditionSingle-Precision Quad Vector Float Scalar SubtractionSpecial — FP Vector Addition and SubtractionVector Floating-Point Addition and SubtractionHADDPS/HADDPD/PFACC — Vector Floating-Point Horizontal AdditionHSUBPS/HSUBPD/PFNACC — Vector Floating-Point Horizontal SubtractionPFPNACC — Vector Floating-Point Horizontal Add/SubExercises
13. FP Vector Multiplication and Division
Floating-Point MultiplicationVector Floating-Point Multiplication(Semi-Vector) DPFP MultiplicationSPFP Scalar MultiplicationDPFP Scalar MultiplicationVector (Float) Multiplication — ADDPseudo VecSingle-Precision Float MultiplicationSingle-Precision Vector Float MultiplicationSingle-Precision Quad Vector Float MultiplicationSingle-Precision Quad Vector Float Multiplication-AddPseudo Vec (x86)vmp_VecMul (3DNow!)vmp_QVecMul (3DNow!)vmp_QVecMAdd (3DNow!)vmp_VecMul (SSE)vmp_VecMul (SSE) Alignedvmp_QVecMul (SSE) Alignedvmp_QVecMAdd (SSE) AlignedVector Scalar MultiplicationPseudo VecSingle-Precision Vector Float Multiplication with ScalarSingle-Precision Quad Vector Float Multiplication with ScalarPseudo Vec (x86)vmp_VecScale (3DNow!)vmp_VecScale (SSE) Alignedvmp_QVecScale (SSE) AlignedI-VU-QGraphics 101 — Dot ProductPseudo VecSingle-Precision Dot ProductPseudo Vec (x86)vmp_DotProduct (3DNow!)vmp_DotProduct (SSE) AlignedGraphics 101 — Cross Productvmp_CrossProduct (3DNow!)vmp_CrossProduct (SSE) AlignedVector Floating-Point Division(Vector) SPFP Division(Semi-Vector) DPFP DivisionSPFP Scalar DivisionDPFP Scalar DivisionN×SPFP Reciprocal1×SPFP Reciprocal (14-Bit)vmp_FDiv (3DNow!) Fast Float Division 14-Bit PrecisionSPFP Reciprocal (2 Stage) (24-Bit)vmp_FDiv (3DNow!) Standard Float Division 24-Bit Precisionvmp_FDiv (SSE) Standard Float Division 24-Bit PrecisionPseudo VecSingle-Precision Vector Float Scalar DivisionPseudo Vec (x86)vmp_QVecDiv (3DNow!) Fast Quad Float Division 14-Bit Precisionvmp_QVecDiv (3DNow!) Standard Quad Float Division 24-Bit Precisionvmp_QVecDiv (SSE) Standard Quad Float Division 24-Bit PrecisionExercises
14. Floating-Point Deux
SQRT — Square Root1×SPFP Scalar Square Root4×SPFP Square Root1×DPFP Scalar Square Root2×DPFP Square Root1×SPFP Scalar Reciprocal Square Root (15-Bit)Pseudo Vec(Float) Square RootPseudo Vec (x86)vmp_FSqrt (3DNow!) Fast Float 15-Bit PrecisionSPFP Square Root (2 Stage) (24-Bit)vmp_FSqrt (3DNow!) Standard Float 24-Bit Precisionvmp_FSqrt (SSE) Float Sqrt 24-Bit PrecisionVector Square RootPseudo VecVector Square RootQuad Vector Square RootPseudo Vec (x86)vmp_QVecSqrt (3DNow!) Fast Quad Float SQRT 15-Bit Precisionvmp_QVecSqrt (3DNow!) Quad Float Sqrt 24-Bit Precisionvmp_QVecSqrt (SSE) Float Sqrt 24-Bit Precisionvmp_QVecSqrtFast (SSE) Float Sqrt ApproximateGraphics 101 — Vector Magnitude (aka 3D Pythagorean Theorem)Pseudo VecPseudo Vec (x86)vmp_VecMagnitude (3DNow!)vmp_VecMagnitude (SSE) AlignedVector NormalizePseudo VecPseudo Vec (x86)vmp_VecNormalize (3DNow!)vmp_VecNormalize (SSE) Aligned
15. Binary-Coded Decimal (BCD)
BCDDAA — Decimal Adjust AL (After) AdditionDAS — Decimal Adjust AL (After) SubtractionAAA — ASCII Adjust (After) AdditionAAS — ASCII Adjust AL (After) SubtractionAAM — ASCII Adjust AX (After) MultiplicationAAD — ASCII Adjust AX (Before) DivisionFBLD — FPU (BCD Load)Graphics 101ASCII String to Double-Precision FloatASCII to Double
16. What CPUID?
CPUIDStandard CPUID EDX-Feature FlagsIntel — Standard CPUID ECX-Feature FlagsIntel — Extended #1 CPUID EDX-Feature FlagsAMD — Extended #1 CPUID EDX-Feature FlagsPIII Serial LicenseSample CPU Detection Codex86 CPU Detect — Bit Flagsx86 CPU Detect — VendorsCpu Detect — Information
17. PC I/O
IN — Input from PortVertical SyncOUT — Output to PortINSx — Input from Port to StringOUTSx — Output String to PortSerial/Parallel Port for IBM PCParallel PortParallel Port Dip SwitchesSerial Port
18. System
System "Lite"System Timing InstructionsRDPMC — Read Performance — Monitoring CountersRDTSC — Read Time-Stamp CounterCalculating Processor Speed80×86 ArchitectureCPU Status Registers (32-Bit EFLAGS/64-Bit RFLAGS)Protection RingsControl Registers(TPR) Task Priority Registers — (CR8)Debug RegistersCache ManipulationCache SizesCache Line SizesPREFETCHx — Prefetch Data into CachesLFENCE — Load FenceSFENCE — Store FenceMFENCE — Memory FenceCLFLUSH — Flush Cache LineINVD — Invalidate Cache (WO/Writeback)WBINVD — Write Back and Invalidate CacheSystem InstructionsARPL — Adjust Requested Privilege LevelBOUND — Check Array Index For Bounding ErrorCLTS — Clear Task Switch FlagHLT — Halt ProcessorUD2 — Undefined InstructionINVLPG — Invalidate TLBLAR — Load Access RightsLOCK — Assert Lock # Signal PrefixLSL — Load Segment LimitMOV — Move To/From Control RegistersMOV — Move To/From Debug RegistersSTMXCSR — Save MXCSR Register StateLDMXCSR — Load MXCSR Register StateSGDT/SIDT — Save Global/Interrupt Descriptor TableLGDT/LIDT — Load Global/Interrupt Descriptor TableSLDT — Save Local Descriptor TableLLDT — Load Local Descriptor TableSMSW — Save Machine Status WordLMSW — Load Machine Status WordSTR — Save Task RegisterLTR — Load Task RegisterRDMSR — Read from Model Specific RegisterWRMSR — Write to Model Specific RegisterSWAPGS — Swap GS Base RegisterSYSCALL — 64-Bit Fast System CallSYSRET — Fast Return from 64-Bit Fast System CallSYSENTER — Fast System CallSYSEXIT — Fast Return from Fast System CallRSM — Resume from System Management ModeVERR/VERW — Verify Segment for ReadingLDS/LES/LFS/LGS/LSS — Load Far PointerHyperthreading InstructionsMONITOR — MonitorMWAIT — Wait
19. Gfx 'R' Asm
Setting MemoryCopying MemorySpeed FreakGraphics 101 — Frame BufferGraphics 101 — BlitCopy BlitTransparent BlitGraphics 101 — Blit (MMX)Graphics Engine — Sprite LayeredGraphics Engine — Sprite OverlayGraphics 101 — Clipping Blit
20. MASM vs. NASM vs. TASM vs. WASM
MASM — Microsoft Macro AssemblerREPEATWHILEFORCompiler Intrinsics
21. Debugging Functions
Guidelines of Assembly DevelopmentVisual C++Tuning and OptimizationException Handling — AKA: Dang that 1.#QNANExceptionsHardware ExceptionSoftware ExceptionFPU Versus MMXPrint OutputFloat Array PrintVector PrintQuad Vector PrintQuaternion PrintMatrix PrintMemory DumpTest JigsMatrix Test FillMatrix Splat
22. Epilogue
A. Data Structure Definitions
B. Mnemonics
C. Reg/Mem Mapping
Glossary
References
ASE File FormatGame Development LinksMPEGSHA-1Personal Computer

Content preview from 32/64-Bit 80x86 Assembly Language Architecture

Chapter 10. Branching

The processor's instruction pointer is just that — a pointer to the instruction that is about to be executed. This register is the RIP in 64-bit, EIP in Protected Mode, and IP in Real Mode. It behaves very similarly to that of a CD player. You can only read one data stream at a time. To read elsewhere, you have to move the pointer to the new location to read. (A better visualization would be a record player with its needle that cannot skip around.)

The only way to read the value of the instruction pointer is to call a function with the CALL instruction and then read the value on the stack where you had been. There is no MOV EAX,EIP instruction.

There are four primary methods that can be used to change the position of the processor's ...

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32/64-Bit 80x86 Assembly Language Architecture

by James Leiterman

Chapter 10. Branching

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