IntelÂ® Extended Memory 64 Technology Software Developer's Guide

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64-Bit Mode Exceptions#SS(0)If a memory address referencing the SS segment is in a non-canonical form.#GP(0)If the memory address is in a non-canonical form.For an attempt to set reserved bits in MXCSR.#PF(fault-code) For a page fault.#NMIf TS in CR0 is set.#UDIf EM in CR0 is set.If OSFXSR in CR4 is 0.If CPUID feature flag SSE is 0.#AC(0)If alignment checking is enabled and an unaligned memory reference is made while thecurrent privilege level is 3.2-280 Vol. 1
LDS/LES/LFS/LGS/LSS—Load Far PointerOpcode Instruction 64-Bit Mode Compat/Leg DescriptionModeC5 /r LDS r16,m16:16 Inv. Valid Load DS:r16 with far pointer from memoryC5 /r LDS r32,m16:32 Inv. Valid Load DS:r32 with far pointer from memory0F B2 /r LSS r16,m16:16 Valid Valid Load SS:r16 with far pointer from memory0F B2 /r LSS r32,m16:32 Valid Valid Load SS:r32 with far pointer from memory0F B2 /r LSS r64,m16:64 Valid N.E. Load SS:r64 with far pointer from memoryC4 /r LES r16,m16:16 Inv. Valid Load ES:r16 with far pointer from memoryC4 /r LES r32,m16:32 Inv. Valid Load ES:r32 with far pointer from memory0F B4 /r LFS r16,m16:16 Valid Valid Load FS:r16 with far pointer from memory0F B4 /r LFS r32,m16:32 Valid Valid Load FS:r32 with far pointer from memory0F B4 /r LFS r64,m16:64 Valid N.E. Load FS:r64 with far pointer from memory0F B5 /r LGS r16,m16:16 Valid Valid Load GS:r16 with far pointer from memory0F B5 /r LGS r32,m16:32 Valid Valid Load GS:r32 with far pointer from memory0F B5 /r LGS r64,m16:64 Valid N.E. Load GS:r64 with far pointer from memoryFlags AffectedNone.IA-32e Mode OperationSame as legacy mode.Default operand size 32-bits.Enables access to new registers R8-R15.Protected Mode Exceptions#UD#GP(0)#GP(selector)#SS(0)#SS(selector)#NP(selector)#PF(fault-code)#AC(0)If source operand is not a memory location.If a null selector is loaded into the SS register.If a memory operand effective address is outside the CS, DS, ES, FS, or GS segment limit.If the DS, ES, FS, or GS register is used to access memory and it contains a null segmentselector.If the SS register is being loaded and any of the following is true: the segment selector indexis not within the descriptor table limits, the segment selector RPL is not equal to CPL, thesegment is a nonwritable data segment, or DPL is not equal to CPL.If the DS, ES, FS, or GS register is being loaded with a non-null segment selector and anyof the following is true: the segment selector index is not within descriptor table limits, thesegment is neither a data nor a readable code segment, or the segment is a data or nonconforming-codesegment and both RPL and CPL are greater than DPL.If a memory operand effective address is outside the SS segment limit.If the SS register is being loaded and the segment is marked not present.If DS, ES, FS, or GS register is being loaded with a non-null segment selector and thesegment is marked not present.If a page fault occurs.If alignment checking is enabled and an unaligned memory reference is made while thecurrent privilege level is 3.Vol. 1 2-281
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Intel ® Extended Memory 64 Technol
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1.6.9.1. Call Gates. . . . . . . .
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FSUB/FSUBP/FISUB—Subtract . . . .
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PADDSB/PADDSW—Add Packed Signed I
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-xii Vol. 1
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ModeIA-32emodeOperatingSystemRequir
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1.3. REGISTER-SET CHANGESThis secti
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Table 1-4 IA32_EFER Bit Description
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IA-32e sub-modeTable 1-8 64-Bit Ext
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REX PREFIX0100WR0BOpcodemod!=11ModR
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1.4.2.4. Direct Memory-Offset MOVsI
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The 64-bit default operation-size e
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1.6.2. Register Settings and IA-32e
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1.6.3.4. Compatibility ModeCompatib
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• When in compatibility mode, FS
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Prior to activating IA-32e mode, PA
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Table 1-22 through Table 1-24 shows
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Table 1-26 Reserved Bit CheckingMod
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• Bits 29:21 index into the 512-e
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Only 64-bit mode call gates can be
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Although the hardware task-switchin
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Table 1-39 IA-32e Mode Interrupt an
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If the IST index for an interrupt g
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1-38 Vol. 1
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• ib, iw, id, io — A 1-byte (ib
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• m16:16, m16:32 & m16:64 —A me
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which is either 16, 32 or 64-bits.
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2.1.3.1. IA-32e Mode OperationThe s
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2.1.10. SIMD Floating-Point Excepti
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AAD—ASCII Adjust AX Before Divisi
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AAS—ASCII Adjust AL After Subtrac
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Real-Address Mode Exceptions#GPIf a
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64-Bit Mode Exceptions#SS(0)If a me
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#PF(fault-code)#NM#UDFor a page fau
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BOUND—Check Array Index Against B
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BSF—Bit Scan ForwardOpcode Instru
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BSWAP—Byte SwapOpcode Instruction
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#AC(0)If alignment checking is enab
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#GP(0)#PF(fault-code)#AC(0)If the m
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#PF(fault-code)#AC(0)If a page faul
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Compatibility Mode ExceptionsSame a
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CDQ—Convert Double to QuadSee ent
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CLD—Clear Direction FlagOpcode In
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CLI—Clear Interrupt FlagOpcode In
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CMC—Complement Carry FlagOpcode I
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Opcode Instruction 64-Bit Mode Comp
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CMP—Compare Two OperandsOpcode In
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CMPPD—Compare Packed Double-Preci
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CMPPS—Compare Packed Single-Preci
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CMPS/CMPSB/CMPSW/CMPSD/CMPSQ—Comp
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CMPSD—Compare Scalar Double-Preci
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CMPSS—Compare Scalar Single-Preci
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CMPXCHG—Compare and ExchangeOpcod
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CMPXCHG8B/CMPXCHG16B—Compare and
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COMISD—Compare Scalar Ordered Dou
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COMISS—Compare Scalar Ordered Sin
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CPUID—CPU IdentificationOpcode In
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Initial EAXValue80000005H80000006H8
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Table 2-8 CPUID Feature Information
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• The most significant bit (bit 3
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Table 2-10 Brand String Offsets (Co
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CVTDQ2PD—Convert Packed Doublewor
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CVTDQ2PS—Convert Packed Doublewor
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CVTPD2DQ—Convert Packed Double-Pr
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CVTPD2PI—Convert Packed Double-Pr
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CVTPD2PS—Covert Packed Double-Pre
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CVTPI2PD—Convert Packed Doublewor
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CVTPI2PS—Convert Packed Doublewor
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CVTPS2DQ—Convert Packed Single-Pr
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CVTPS2PD—Covert Packed Single-Pre
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CVTPS2PI—Convert Packed Single-Pr
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CVTSD2SI—Convert Scalar Double-Pr
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CVTSD2SS—Convert Scalar Double-Pr
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CVTSI2SD—Convert Doubleword Integ
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CVTSI2SS—Convert Doubleword Integ
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CVTSS2SD—Convert Scalar Single-Pr
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CVTSS2SI—Convert Scalar Single-Pr
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CVTTPD2PI—Convert with Truncation
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CVTTPD2DQ—Convert with Truncation
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CVTTPS2DQ—Convert with Truncation
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CVTTPS2PI—Convert with Truncation
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CVTTSD2SI—Convert with Truncation
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CVTTSS2SI—Convert with Truncation
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CWD/CDQ/CQQ—Convert Word to Doubl
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DAS—Decimal Adjust AL after Subtr
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Virtual-8086 Mode Exceptions#DE If
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ENTER—Make Stack Frame for Proced
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FABS—Absolute ValueOpcode Instruc
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Virtual-8086 Mode Exceptions#GP(0)I
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FCLEX/FNCLEX—Clear ExceptionsOpco
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FCOM/FCOMP/FCOMPP—Compare Floatin
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FCOMI/FCOMIP/ FUCOMI/FUCOMIP—Comp
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FDECSTP—Decrement Stack-Top Point
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FICOM/FICOMP—Compare IntegerOpcod
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FILD—Load IntegerOpcode Instructi
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FINCSTP—Increment Stack-Top Point
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FIST/FISTP—Store IntegerOpcode In
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FISTTP—Store Integer with Truncat
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FLD—Load Floating Point ValueOpco
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FLD1/FLDL2T/FLDL2E/FLDPI/FLDLG2/FLD
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Compatibility Mode ExceptionsSame a
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FPATAN—Partial ArctangentOpcode I
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FPREM1—Partial RemainderOpcode In
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FRNDINT—Round to IntegerOpcode In
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FSIN—SineOpcode Instruction 64-Bi
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FSQRT—Square RootOpcode Instructi
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Protected Mode Exceptions#GP(0)If a
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Protected Mode Exceptions#GP(0)If a
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FUCOM/FUCOMP/FUCOMPP—Unordered Co
Page 279 and 280: FXAM—ExamineOpcode Instruction 64
Page 281 and 282: FXRSTOR—Restore x87 FPU, MMX, SSE
Page 283 and 284: FXSAVE—Save x87 FPU, MMX, SSE, an
Page 285 and 286: XMM0 throughXMM7XMM registers (128
Page 287 and 288: Table 2-14 Layout of the 64-bit FXS
Page 289 and 290: Protected Mode Exceptions#GP(0)For
Page 291 and 292: FXTRACT—Extract Exponent and Sign
Page 293 and 294: FYL2XP1—Compute y ∗ log 2 (x +1
Page 295 and 296: 64-Bit Mode Exceptions#SS(0)If a me
Page 299 and 300: HSUBPD—Horizontal Subtract Packed
Page 301 and 302: HSUBPS—Horizontal Subtract Packed
Page 303 and 304: IDIV—Signed DivideOpcode Instruct
Page 305 and 306: IMUL—Signed MultiplyOpcode Instru
Page 307 and 308: IN—Input from PortOpcode Instruct
Page 311 and 312: Compatibility Mode ExceptionsSame a
Page 313 and 314: Real-Address Mode Exceptions#GPIf a
Page 315 and 316: INVD—Invalidate Internal CachesOp
Page 317 and 318: IRET/IRETD—Interrupt ReturnOpcode
Page 319 and 320: Jcc—Jump if Condition Is MetOpcod
Page 321 and 322: Opcode Instruction 64-Bit Mode Comp
Page 323 and 324: #SS(0)#NP (selector)#PF(fault-code)
Page 325 and 326: LAHF—Load Status Flags into AH Re
Page 327 and 328: LDDQU—Load Unaligned Double Quadw
Page 329: LDMXCSR—Load MXCSR RegisterOpcode
Page 333 and 334: LEA—Load Effective AddressOpcode
Page 335 and 336: LES—Load Full PointerSee entry fo
Page 337 and 338: LFS—Load Full PointerSee entry fo
Page 339 and 340: LGS—Load Full PointerSee entry fo
Page 343 and 344: LMSW—Load Machine Status WordOpco
Page 345 and 346: LODS/LODSB/LODSW/LODSD/LODSQ—Load
Page 347 and 348: LOOP/LOOPcc—Loop According to ECX
Page 349 and 350: LSS—Load Full PointerSee entry fo
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