Intel® Architecture Instruction Set Extensions Programming Reference

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

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

MOVNTDQA — Load Double Quadword Non-Temporal Aligned Hint Opcode/ Instruction Description Op/ En 64/32 -bit Mode CPUID Feature Flag Description Instruction Operand Encoding 1 INSTRUCTION SET REFERENCE 66 0F 38 2A /r A V/V SSE4_1 Move double quadword from m128 to xmm1 using non-temporal hint if WC memory type. MOVNTDQA xmm1, m128 VEX.128.66.0F38.WIG 2A /r A V/V AVX Move double quadword from m128 to xmm using non-temporal hint if WC memory type. VMOVNTDQA xmm1, m128 VEX.256.66.0F38.WIG 2A /r A V/V AVX2 Move 256-bit data from m256 to ymm using non-temporal hint if WC memory type. VMOVNTDQA ymm1, m256 Op/En Operand 1 Operand 2 Operand 3 Operand 4 A ModRM:reg (w) ModRM:r/m (r) NA NA MOVNTDQA loads a double quadword from the source operand (second operand) to the destination operand (first operand) using a non-temporal hint if the memory source is WC (write combining) memory type. For WC memory type, the nontemporal hint may be implemented by loading a temporary internal buffer with the equivalent of an aligned cache line without filling this data to the cache. Any memory-type aliased lines in the cache will be snooped and flushed. Subsequent MOVNTDQA reads to unread portions of the WC cache line will receive data from the temporary internal buffer if data is available. The temporary internal buffer may be flushed by the processor at any time for any reason, for example: • A load operation other than a MOVNTDQA which references memory already resident in a temporary internal buffer. • A non-WC reference to memory already resident in a temporary internal buffer. • Interleaving of reads and writes to a single temporary internal buffer. • Repeated (V)MOVNTDQA loads of a particular 16-byte item in a streaming line. • Certain micro-architectural conditions including resource shortages, detection of a mis-speculation condition, and various fault conditions. The non-temporal hint is implemented by using a write combining (WC) memory type protocol when reading the data from memory. Using this protocol, the processor does not read the data into the cache hierarchy, nor does it fetch the corresponding cache line from memory into the cache hierarchy. The memory type of the region being read can override the non-temporal hint, if the memory address specified for the non-temporal read is not a WC memory region. Information on non-temporal reads and writes can be found in “Caching of Temporal vs. Non-Temporal Data” in Chapter 10 in the Intel® 64 and IA-32 Architecture Software Developer’s Manual, Volume 3A. Because the WC protocol uses a weakly-ordered memory consistency model, a fencing operation implemented with a MFENCE instruction should be used in conjunction with MOVNTDQA instructions if multiple processors might use different memory types for the referenced memory locations or to synchronize reads of a processor with writes by other agents in the system. A processor’s implementation of the streaming load hint does not override the effective memory type, but the implementation of the hint is processor dependent. For example, a processor implementation may choose to ignore the hint and process the instruction as a normal MOVDQA for any memory type. Alternatively, another implementation may optimize cache reads generated by MOVNTDQA on WB memory type to reduce cache evictions. The 128-bit (V)MOVNTDQA addresses must be 16-byte aligned or the instruction will cause a #GP. The 256-bit VMOVNTDQA addresses must be 32-byte aligned or the instruction will cause a #GP. 1. ModRM.MOD = 011B required Ref. # 319433-014 5-173
INSTRUCTION SET REFERENCE Operation MOVNTDQA (128bit- Legacy SSE form) DEST SRC DEST[VLMAX:128] (Unmodified) VMOVNTDQA (VEX.128 encoded form) DEST SRC DEST[VLMAX:128] 0 VMOVNTDQA (VEX.256 encoded form) DEST[255:0] SRC[255:0] Intel C/C++ Compiler Intrinsic Equivalent (V)MOVNTDQA: __m128i _mm_stream_load_si128 (__m128i *p); VMOVNTDQA: __m256i _mm256_stream_load_si256 (const __m256i *p); SIMD Floating-Point Exceptions None Other Exceptions See Exceptions Type1; additionally #UD If VEX.vvvv != 1111B. 5-174 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 Descripti
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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 Intel C/C
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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 - FMA For
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INSTRUCTION SET REFERENCE - FMA sou
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INSTRUCTION SET REFERENCE - FMA VFM
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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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INTEL® TRANSACTIONAL SYNCHRONIZATI
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ADDITIONAL NEW INSTRUCTIONS -------
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ADDITIONAL NEW INSTRUCTIONS • If
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ADDITIONAL NEW INSTRUCTIONS ADCX
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ADDITIONAL NEW INSTRUCTIONS ADOX
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ADDITIONAL NEW INSTRUCTIONS Compati
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ADDITIONAL NEW INSTRUCTIONS Flags A
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ADDITIONAL NEW INSTRUCTIONS STAC—
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OPCODE MAP D The reg field of the M
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OPCODE MAP • A ModR/M byte is req
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OPCODE MAP A.2.5 Superscripts Utili
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OPCODE MAP Table A-2. One-byte Opco
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OPCODE MAP 0 1 2 3 4 5 6 7 Table A-
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OPCODE MAP 8 9 A B C D E F Table A-
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OPCODE MAP 0 Table A-4. Three-byte
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OPCODE MAP 0 66 1 66 2 66 3 4 66 5
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OPCODE MAP A.4 OPCODE EXTENSIONS FO
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OPCODE MAP Opcode Group Mod 7,6 pfx
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OPCODE MAP Table A-8 shows the map
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OPCODE MAP Table A-20 shows the opc
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OPCODE MAP This page was intentiona
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INSTRUCTION SUMMARY VEX.256 Encodin
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INSTRUCTION SUMMARY Note 3: It is e
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INSTRUCTION SUMMARY Table B-2. Prom
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INSTRUCTION SUMMARY Table B-3. VEX-
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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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