x86-64.net

Instruction

VPSLLDQ

Shifts each 128-bit lane left by a number of bytes given by an immediate.

Extensions
Forms
8 (2 VEX, 6 EVEX)
Data
Intel XED v2026.08.23

Forms

Every encoding of VPSLLDQ that Intel XED knows, one row per XED instruction form (iform). How to read the notation.
InstructionEncodingRequires
VPSLLDQ xmm, xmm, imm8 VPSLLDQ_XMMdq_XMMdq_IMMbVEX.128.66.0F.WIG 73 /7 ibAVX
VPSLLDQ ymm, ymm, imm8 VPSLLDQ_YMMqq_YMMqq_IMMbVEX.256.66.0F.WIG 73 /7 ibAVX2
VPSLLDQ xmm, xmm, imm8 VPSLLDQ_XMMu8_XMMu8_IMM8_AVX512EVEX.128.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW + AVX512VL
VPSLLDQ xmm, m128, imm8 VPSLLDQ_XMMu8_MEMu8_IMM8_AVX512EVEX.128.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW + AVX512VL
VPSLLDQ ymm, ymm, imm8 VPSLLDQ_YMMu8_YMMu8_IMM8_AVX512EVEX.256.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW + AVX512VL
VPSLLDQ ymm, m256, imm8 VPSLLDQ_YMMu8_MEMu8_IMM8_AVX512EVEX.256.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW + AVX512VL
VPSLLDQ zmm, zmm, imm8 VPSLLDQ_ZMMu8_ZMMu8_IMM8_AVX512EVEX.512.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW
VPSLLDQ zmm, m512, imm8 VPSLLDQ_ZMMu8_MEMu8_IMM8_AVX512EVEX.512.66.0F.WIG 73 /7 ibAVX10.1 or AVX512BW

Intrinsics

The C intrinsics of Clang 23.1.2 that compile to VPSLLDQ, 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
_mm_bslli_si128 __m128i _mm_bslli_si128(__m128i a, const int imm)

VPSLLDQ xmm, xmm, imm8 VEX.128 -mavxwith AVX enabled

_mm_slli_si128 __m128i _mm_slli_si128(__m128i a, const int imm)

VPSLLDQ xmm, xmm, imm8 VEX.128 -mavxwith AVX enabled

_mm256_bslli_epi128 __m256i _mm256_bslli_epi128(__m256i a, const int imm)

VPSLLDQ ymm, ymm, imm8 VEX.256 -mavx2

_mm256_slli_si256 __m256i _mm256_slli_si256(__m256i a, const int imm)

VPSLLDQ ymm, ymm, imm8 VEX.256 -mavx2

_mm512_bslli_epi128 __m512i _mm512_bslli_epi128(__m512i a, const int imm)

VPSLLDQ zmm, zmm, imm8 EVEX.512 -mavx512bw

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
AVX

AVX
CPUID.01H:ECX[28] AVX

Sandy Bridge, Ivy Bridge, Haswell, Broadwell, Skylake, Comet Lake, Cannon Lake, Ice Lake (client), Tiger Lake, Alder Lake, Arrow Lake, Panther Lake, Nova Lake, Skylake-SP, Cascade Lake, Cooper Lake, Ice Lake (server), Sapphire Rapids, Emerald Rapids, Granite Rapids, Diamond Rapids, Sierra Forest, Clearwater Forest, Knights Landing, Knights Mill, Bulldozer, Piledriver, Zen, Zen+, Zen 2
AVX2

AVX2
CPUID.(EAX=07H,ECX=0):EBX[5] AVX2

Haswell, Broadwell, Skylake, Comet Lake, Cannon Lake, Ice Lake (client), Tiger Lake, Alder Lake, Arrow Lake, Panther Lake, Nova Lake, Skylake-SP, Cascade Lake, Cooper Lake, Ice Lake (server), Sapphire Rapids, Emerald Rapids, Granite Rapids, Diamond Rapids, Sierra Forest, Clearwater Forest, Knights Landing, Knights Mill, Zen, Zen+, Zen 2
AVX512BW_128

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

or

AVX512BW + AVX512VL
CPUID.(EAX=07H,ECX=0):EBX[30] AVX512BW
CPUID.(EAX=07H,ECX=0):EBX[31] AVX512VL

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
AVX512BW_256

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

or

AVX512BW + AVX512VL
CPUID.(EAX=07H,ECX=0):EBX[30] AVX512BW
CPUID.(EAX=07H,ECX=0):EBX[31] AVX512VL

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
AVX512BW_512

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

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.