x86-64.net

Instruction

VEXTRACTI64X4

Copies the 256-bit block of quadwords that an immediate selects to a register or memory, masked per element.

Extensions
Forms
2 (2 EVEX)
Data
Intel XED v2026.08.23

Forms

Every encoding of VEXTRACTI64X4 that Intel XED knows, one row per XED instruction form (iform). How to read the notation.
InstructionEncodingRequires
VEXTRACTI64X4 ymm {k}{z}, zmm, imm8 VEXTRACTI64X4_YMMu64_MASKmskw_ZMMu64_IMM8_AVX512EVEX.512.66.0F3A.W1 3B /r ibAVX10.1 or AVX512F
VEXTRACTI64X4 m256 {k}, zmm, imm8 VEXTRACTI64X4_MEMu64_MASKmskw_ZMMu64_IMM8_AVX512EVEX.512.66.0F3A.W1 3B /r ibAVX10.1 or AVX512F

Intrinsics

The C intrinsics of Clang 23.1.2 that compile to VEXTRACTI64X4, each with the form it compiles to and the Clang options it needs. The forms come from compiling every intrinsic and decoding the result with Intel XED; all intrinsics A–Z explains the method.

IntrinsicCompiles to
_mm512_extracti64x4_epi64 __m256i _mm512_extracti64x4_epi64(__m512i A, const int imm)

VEXTRACTI64X4 ymm, zmm, imm8 EVEX.512 -mavx512f

_mm512_mask_extracti64x4_epi64 __m256i _mm512_mask_extracti64x4_epi64(__m256i W, __mmask8 U, __m512i A, const int imm)

VEXTRACTI64X4 ymm {k}, zmm, imm8 EVEX.512 -mavx512f

_mm512_maskz_extracti64x4_epi64 __m256i _mm512_maskz_extracti64x4_epi64(__mmask8 U, __m512i A, const int imm)

VEXTRACTI64X4 ymm {k}{z}, zmm, imm8 EVEX.512 -mavx512f

CPUID and processors

Each form belongs to an XED ISA set. A form can be used when the processor reports every CPUID bit of one of its ISA set's alternatives.

CPUID requirements and processors of the XED ISA sets above. Alternatives are separated by “or”; processors follow XED’s chip model, which covers AMD processors up to Zen 2.
ISA setCPUIDProcessors in XED
AVX512F_512

AVX10.1
CPUID.(EAX=07H,ECX=1):EDX[19] AVX10
CPUID.(EAX=24H,ECX=0):EBX[7:0] ≥ 1 AVX10 version

or

AVX512F
CPUID.(EAX=07H,ECX=0):EBX[16] AVX512F

Cannon Lake, Ice Lake (client), Tiger Lake, Nova Lake, Skylake-SP, Cascade Lake, Cooper Lake, Ice Lake (server), Sapphire Rapids, Emerald Rapids, Granite Rapids, Diamond Rapids, Knights Landing, Knights Mill

More AVX10.1 instructions

All 686 AVX10.1 instructions

Sources

  1. Intel XED v2026.08.23 (commit 0bcb6237345c): forms, encodings, ISA sets, CPUID bits and chip model.
  2. Clang's x86 intrinsic headers, LLVM 23.1.2 (commit 85ac56026243): the intrinsics, their signatures and doc comments, and the Clang of that release, which compiled each of them.
  3. Intel Advanced Vector Extensions 10.2 Architecture Specification, revision 6.0 (361050-006, January 2026)

The tables are derived from Intel XED, Copyright Intel Corporation, licensed under the Apache License 2.0; x86-64.net converted and reformatted them. The intrinsics and their signatures come from Clang, part of the LLVM Project, licensed under the Apache License 2.0 with LLVM Exceptions. The text is our own.