x86-64.net

Instruction

KMOVD

Moves a 32-bit mask between mask registers, general-purpose registers and memory; APX adds EVEX forms that reach the extended general-purpose registers.

Extensions
Forms
10 (5 VEX, 5 EVEX)
Data
Intel XED v2026.08.23

Forms

Every encoding of KMOVD that Intel XED knows, one row per XED instruction form (iform). How to read the notation.
InstructionEncodingRequires
KMOVD k, k KMOVD_MASKmskw_MASKu32_AVX512VEX.LZ.66.0F.W1 90 /rAVX10.1 or AVX512BW
KMOVD k, m32 KMOVD_MASKmskw_MEMu32_AVX512VEX.LZ.66.0F.W1 90 /rAVX10.1 or AVX512BW
KMOVD m32, k KMOVD_MEMu32_MASKmskw_AVX512VEX.LZ.66.0F.W1 91 /rAVX10.1 or AVX512BW
KMOVD k, r32 KMOVD_MASKmskw_GPR32u32_AVX512VEX.LZ.F2.0F.W0 92 /rAVX10.1 or AVX512BW
KMOVD r32, k KMOVD_GPR32u32_MASKmskw_AVX512VEX.LZ.F2.0F.W0 93 /rAVX10.1 or AVX512BW
KMOVD r32, k KMOVD_GPR32u32_MASKmskw_APXEVEX.LLZ.F2.0F.W0 93 /rAVX10.1 + APX_F or APX_F + AVX512BW
KMOVD m32, k KMOVD_MEMu32_MASKmskw_APXEVEX.LLZ.66.0F.W1 91 /rAVX10.1 + APX_F or APX_F + AVX512BW
KMOVD k, k KMOVD_MASKmskw_MASKu32_APXEVEX.LLZ.66.0F.W1 90 /rAVX10.1 + APX_F or APX_F + AVX512BW
KMOVD k, m32 KMOVD_MASKmskw_MEMu32_APXEVEX.LLZ.66.0F.W1 90 /rAVX10.1 + APX_F or APX_F + AVX512BW
KMOVD k, r32 KMOVD_MASKmskw_GPR32u32_APXEVEX.LLZ.F2.0F.W0 92 /rAVX10.1 + APX_F or APX_F + AVX512BW

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
AVX512BW_KOPD

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

or

AVX512BW
CPUID.(EAX=07H,ECX=0):EBX[30] AVX512BW

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
APX_F_KOPD

AVX10.1 + APX_F
CPUID.(EAX=07H,ECX=1):EDX[21] APX_F
CPUID.(EAX=07H,ECX=1):EDX[19] AVX10
CPUID.(EAX=24H,ECX=0):EBX[7:0] ≥ 1 AVX10 version

or

APX_F + AVX512BW
CPUID.(EAX=07H,ECX=1):EDX[21] APX_F
CPUID.(EAX=07H,ECX=0):EBX[30] AVX512BW

Nova Lake, Diamond Rapids

More AVX10.1 instructions

All 686 AVX10.1 instructions

More APX instructions

All 88 APX instructions

Sources

  1. Intel XED v2026.08.23 (commit 0bcb6237345c): forms, encodings, ISA sets, CPUID bits and chip model.
  2. Intel Advanced Vector Extensions 10.2 Architecture Specification, revision 6.0 (361050-006, January 2026)
  3. Intel Advanced Performance Extensions (Intel APX) Architecture Specification, revision 7.0 (July 2025)

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 text is our own.