Intel® Architecture Instruction Set Extensions Programming Reference

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$Intel® Math Kernel Library (Intel® MKL) 11.0 Release Notes$

$Intel® Math Kernel Library 11.0 Support for Intel® Xeon Phi ...$

RDSEED—Read Random SEED Opcode/ <strong>Instruction</strong> 0F C7 /7 RDSEED r16 0F C7 /7 RDSEED r32 REX.W + 0F C7 /7 RDSEED r64 Description <strong>Instruction</strong> Operand Encoding ADDITIONAL NEW INSTRUCTIONS Loads a hardware generated random value and store it in the destination register. The random value is generated from an Enhanced NRBG (Non Deterministic Random Bit Generator) that is compliant to NIST SP800-90B and NIST SP800-90C in the XOR construction mode. The size of the random value is determined by the destination register size and operating mode. The Carry Flag indicates whether a random value is available at the time the instruction is executed. CF=1 indicates that the data in the destination is valid. Otherwise CF=0 and the data in the destination operand will be returned as zeros for the specified width. All other flags are forced to 0 in either situation. Software must check the state of CF=1 for determining if a valid random seed value has been returned, otherwise it is expected to loop and retry execution of RDSEED (see Section 1.2). The RDSEED instruction is available at all privilege levels. The RDSEED instruction executes normally either inside or outside a transaction region. In 64-bit mode, the instruction's default operation size is 32 bits. Using a REX prefix in the form of REX.B permits access to additional registers (R8-R15). Using a REX prefix in the form of REX.W promotes operation to 64 bit operands. See the summary chart at the beginning of this section for encoding data and limits. Operation IF HW_NRND_GEN.ready = 1 THEN CASE of osize is 64: DEST[63:0] ← HW_NRND_GEN.data; osize is 32: DEST[31:0] ← HW_NRND_GEN.data; osize is 16: DEST[15:0] ← HW_NRND_GEN.data; ESAC; CF ← 1; ELSE CASE of osize is 64: DEST[63:0] ← 0; osize is 32: DEST[31:0] ← 0; osize is 16: DEST[15:0] ← 0; ESAC; CF ← 0; FI; OF, SF, ZF, AF, PF ← 0; Op/ En 64/32 bit Mode Support CPUID Feature Flag Description A V/V RDSEED Read a 16-bit NIST SP800-90B & C compliant random value and store in the destination register. A V/V RDSEED Read a 32-bit NIST SP800-90B & C compliant random value and store in the destination register. A V/I RDSEED Read a 64-bit NIST SP800-90B & C compliant random value and store in the destination register. Op/En Operand 1 Operand 2 Operand 3 Operand 4 A ModRM:r/m (w) NA NA NA Ref. # 319433-014 9-11
ADDITIONAL NEW INSTRUCTIONS Flags Affected All flags are affected C/C++ Compiler Intrinsic Equivalent RDSEED int _rdseed16_step( unsigned short * ); RDSEED int _rdseed32_step( unsigned int * ); RDSEED int _rdseed64_step( unsigned __int64 *); Protected Mode Exceptions #UD If the LOCK prefix is used. If the F2H or F3H prefix is used. If CPUID.(EAX=07H, ECX=0H):EBX.RDSEED[bit 18] = 0 Real-Address Mode Exceptions #UD If the LOCK prefix is used. If the F2H or F3H prefix is used. If CPUID.(EAX=07H, ECX=0H):EBX.RDSEED[bit 18] = 0 Virtual-8086 Mode Exceptions #UD If the LOCK prefix is used. If the F2H or F3H prefix is used. If CPUID.(EAX=07H, ECX=0H):EBX.RDSEED[bit 18] = 0 Compatibility Mode Exceptions #UD If the LOCK prefix is used. If the F2H or F3H prefix is used. If CPUID.(EAX=07H, ECX=0H):EBX.RDSEED[bit 18] = 0 64-Bit Mode Exceptions #UD If the LOCK prefix is used. If the F2H or F3H prefix is used. If CPUID.(EAX=07H, ECX=0H):EBX.RDSEED[bit 18] = 0 9-12 Ref. # 319433-014
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Intel® Architecture Instruction Se
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CONTENTS CHAPTER 1 INTEL® ADVANCED
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PANDN — Logical AND NOT . . . . .
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BZHI — Zero High Bits Starting wi
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TABLES 2-1 Rounding behavior of Zer
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FIGURES Figure 2-1. General Procedu
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INTEL® ADVANCED VECTOR EXTENSIONS
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APPLICATION PROGRAMMING MODEL Prior
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APPLICATION PROGRAMMING MODEL } and
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APPLICATION PROGRAMMING MODEL Scala
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APPLICATION PROGRAMMING MODEL x (mu
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APPLICATION PROGRAMMING MODEL Instr
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APPLICATION PROGRAMMING MODEL Table
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APPLICATION PROGRAMMING MODEL Excep
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APPLICATION PROGRAMMING MODEL 2.7.2
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APPLICATION PROGRAMMING MODEL EAX 3
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APPLICATION PROGRAMMING MODEL • T
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APPLICATION PROGRAMMING MODEL How B
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APPLICATION PROGRAMMING MODEL
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APPLICATION PROGRAMMING MODEL EAX[1
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APPLICATION PROGRAMMING MODEL EBX
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SYSTEM PROGRAMMING MODEL • Verify
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SYSTEM PROGRAMMING MODEL The proces
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SYSTEM PROGRAMMING MODEL 3.3 RESET
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INSTRUCTION FORMAT 4.1.1 VEX and th
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INSTRUCTION FORMAT (Bit Position) 7
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INSTRUCTION FORMAT The VEX.vvvv fie
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INSTRUCTION FORMAT 4.1.8 The Third
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INSTRUCTION FORMAT NOTES: 1. If Mod
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INSTRUCTION SET REFERENCE (V)ADDSD
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INSTRUCTION SET REFERENCE register
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INSTRUCTION SET REFERENCE MPSADBW
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INSTRUCTION SET REFERENCE SRC2_BYTE
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INSTRUCTION SET REFERENCE VMPSADBW
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INSTRUCTION SET REFERENCE DEST[79:6
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INSTRUCTION SET REFERENCE Operation
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INSTRUCTION SET REFERENCE PACKSSWB/
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INSTRUCTION SET REFERENCE PACKUSDW
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INSTRUCTION SET REFERENCE TMP[239:2
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INSTRUCTION SET REFERENCE DEST[119:
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INSTRUCTION SET REFERENCE PADDB/PAD
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INSTRUCTION SET REFERENCE PADDQ (Le
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INSTRUCTION SET REFERENCE PADDSB/PA
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INSTRUCTION SET REFERENCE PADDUSB/P
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INSTRUCTION SET REFERENCE PALIGNR
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INSTRUCTION SET REFERENCE PAND —
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INSTRUCTION SET REFERENCE PANDN —
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INSTRUCTION SET REFERENCE PAVGB/PAV
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INSTRUCTION SET REFERENCE PBLENDVB
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INSTRUCTION SET REFERENCE IF (MASK[
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INSTRUCTION SET REFERENCE PBLENDW
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INSTRUCTION SET REFERENCE ELSE DEST
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INSTRUCTION SET REFERENCE Descripti
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INSTRUCTION SET REFERENCE PCMPEQQ (
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INSTRUCTION SET REFERENCE Intel C/C
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INSTRUCTION SET REFERENCE PHADDSW
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INSTRUCTION SET REFERENCE PHSUBW/PH
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INSTRUCTION SET REFERENCE PMADDUBSW
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INSTRUCTION SET REFERENCE VPMADDWD
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INSTRUCTION SET REFERENCE VEX.128 e
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INSTRUCTION SET REFERENCE VPMINUD (
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INSTRUCTION SET REFERENCE PMOVMSKB
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INSTRUCTION SET REFERENCE Opcode/ I
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INSTRUCTION SET REFERENCE VPMOVSXWQ
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INSTRUCTION SET REFERENCE PMOVZX
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INSTRUCTION SET REFERENCE Packed_Ze
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INSTRUCTION SET REFERENCE Other Exc
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INSTRUCTION SET REFERENCE temp13[31
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INSTRUCTION SET REFERENCE PMULHUW
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INSTRUCTION SET REFERENCE PMULLW/PM
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INSTRUCTION SET REFERENCE Temp10[31
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INSTRUCTION SET REFERENCE PMULUDQ
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INSTRUCTION SET REFERENCE POR — B
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INSTRUCTION SET REFERENCE PSADBW
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INSTRUCTION SET REFERENCE PSHUFB
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INSTRUCTION SET REFERENCE PSHUFD
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INSTRUCTION SET REFERENCE PSHUFHW
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INSTRUCTION SET REFERENCE PSHUFLW
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INSTRUCTION SET REFERENCE PSIGNB/PS
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INSTRUCTION SET REFERENCE DEST[255.
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INSTRUCTION SET REFERENCE PSLLDQ
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INSTRUCTION SET REFERENCE PSLLW/PSL
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INSTRUCTION SET REFERENCE PSLLD (xm
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INSTRUCTION SET REFERENCE PSRAW/PSR
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INSTRUCTION SET REFERENCE COUNT 31
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INSTRUCTION SET REFERENCE PSRLDQ
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INSTRUCTION SET REFERENCE PSRLW/PSR
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INSTRUCTION SET REFERENCE FI; DEST[
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INSTRUCTION SET REFERENCE VPSRLQ (x
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INSTRUCTION SET REFERENCE PSUBSB/PS
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INSTRUCTION SET REFERENCE PSUBUSB/P
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INSTRUCTION SET REFERENCE PUNPCKHBW
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INSTRUCTION SET REFERENCE VPUNPCKHW
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INSTRUCTION SET REFERENCE Instructi
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INSTRUCTION SET REFERENCE INTERLEAV
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INSTRUCTION SET REFERENCE VPUNPCKLD
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INSTRUCTION SET REFERENCE SIMD Floa
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INSTRUCTION SET REFERENCE VBROADCAS
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INSTRUCTION SET REFERENCE VPBLENDD
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INSTRUCTION SET REFERENCE VPBROADCA
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INSTRUCTION SET REFERENCE VPERMPD
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INSTRUCTION SET REFERENCE VPERMQ
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INSTRUCTION SET REFERENCE VINSERTI1
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INSTRUCTION SET REFERENCE The secon
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INSTRUCTION SET REFERENCE VPSLLVD/V
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INSTRUCTION SET REFERENCE Other Exc
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INSTRUCTION SET REFERENCE VPSRAVD (
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INSTRUCTION SET REFERENCE VPSRLVD (
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INSTRUCTION SET REFERENCE VGATHERDP
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INSTRUCTION SET REFERENCE VGATHERQP
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INSTRUCTION SET REFERENCE VGATHERDP
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INSTRUCTION SET REFERENCE VGATHERQP
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INSTRUCTION SET REFERENCE VPGATHERD
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INSTRUCTION SET REFERENCE VPGATHERQ
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INSTRUCTION SET REFERENCE VPGATHERD
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INSTRUCTION SET REFERENCE VPGATHERQ
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INSTRUCTION SET REFERENCE This page
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INSTRUCTION SET REFERENCE - FMA VFM
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INSTRUCTION SET REFERENCE - FMA For
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INSTRUCTION SET REFERENCE - FMA sou
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INSTRUCTION SET REFERENCE - FMA Int
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INSTRUCTION SET REFERENCE - FMA the
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INSTRUCTION SET REFERENCE - FMA the
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INSTRUCTION SET REFERENCE - FMA } I
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INSTRUCTION SET REFERENCE - FMA ope
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INSTRUCTION SET REFERENCE - FMA VFN
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INSTRUCTION SET REFERENCE - FMA VEX
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INSTRUCTION SET REFERENCE - FMA VEX
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INSTRUCTION SET REFERENCE - FMA Thi
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INSTRUCTION SET REFERENCE - VEX-ENC
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INSTRUCTION SET REFERENCE - VEX-ENC
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Page 387 and 388: INTEL® TRANSACTIONAL SYNCHRONIZATI
Page 407 and 408: ADDITIONAL NEW INSTRUCTIONS -------
Page 409 and 410: ADDITIONAL NEW INSTRUCTIONS • If
Page 411 and 412: ADDITIONAL NEW INSTRUCTIONS ADCX
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Page 435 and 436: OPCODE MAP 0 66 1 66 2 66 3 4 66 5
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Page 451 and 452: INSTRUCTION SUMMARY VEX.256 Encodin
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INSTRUCTION SUMMARY Opcode Instruct
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SSE extensions flag . . . . . . . .
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SSE extensions CPUID flag . . . . .
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I-6 Ref. # 319433-014
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Intel® Architecture Instruction Set Extensions Programming Reference

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