x86-64.net

Instruction

VCVTDQ2PD

Converts packed signed doublewords to doubles.

Extensions
Forms
10 (4 VEX, 6 EVEX)
Data
Intel XED v2026.08.23

Forms

Every encoding of VCVTDQ2PD that Intel XED knows, one row per XED instruction form (iform). How to read the notation.
InstructionEncodingRequires
VCVTDQ2PD xmm, m64 VCVTDQ2PD_XMMdq_MEMqVEX.128.F3.0F.WIG E6 /rAVX
VCVTDQ2PD xmm, xmm VCVTDQ2PD_XMMdq_XMMqVEX.128.F3.0F.WIG E6 /rAVX
VCVTDQ2PD ymm, m128 VCVTDQ2PD_YMMqq_MEMdqVEX.256.F3.0F.WIG E6 /rAVX
VCVTDQ2PD ymm, xmm VCVTDQ2PD_YMMqq_XMMdqVEX.256.F3.0F.WIG E6 /rAVX
VCVTDQ2PD zmm {k}{z}, ymm VCVTDQ2PD_ZMMf64_MASKmskw_YMMi32_AVX512EVEX.512.F3.0F.W0 E6 /r
EVEX.LIG.F3.0F.W0 E6 /r		AVX10.1 or AVX512F
VCVTDQ2PD zmm {k}{z}, m512/m32bcst VCVTDQ2PD_ZMMf64_MASKmskw_MEMi32_AVX512EVEX.512.F3.0F.W0 E6 /rAVX10.1 or AVX512F
VCVTDQ2PD xmm {k}{z}, xmm VCVTDQ2PD_XMMf64_MASKmskw_XMMi32_AVX512EVEX.128.F3.0F.W0 E6 /rAVX10.1 or AVX512F + AVX512VL
VCVTDQ2PD xmm {k}{z}, m128/m32bcst VCVTDQ2PD_XMMf64_MASKmskw_MEMi32_AVX512EVEX.128.F3.0F.W0 E6 /rAVX10.1 or AVX512F + AVX512VL
VCVTDQ2PD ymm {k}{z}, xmm VCVTDQ2PD_YMMf64_MASKmskw_XMMi32_AVX512EVEX.256.F3.0F.W0 E6 /rAVX10.1 or AVX512F + AVX512VL
VCVTDQ2PD ymm {k}{z}, m256/m32bcst VCVTDQ2PD_YMMf64_MASKmskw_MEMi32_AVX512EVEX.256.F3.0F.W0 E6 /rAVX10.1 or AVX512F + AVX512VL

Intrinsics

The C intrinsics of Clang 23.1.2 that compile to VCVTDQ2PD, 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_cvtepi32_pd __m128d _mm_cvtepi32_pd(__m128i __a)

VCVTDQ2PD xmm, xmm VEX.128 -mavxwith AVX enabled

_mm_mask_cvtepi32_pd __m128d _mm_mask_cvtepi32_pd(__m128d __W, __mmask8 __U, __m128i __A)

VCVTDQ2PD xmm {k}, xmm EVEX.128 -mavx512vl

_mm_maskz_cvtepi32_pd __m128d _mm_maskz_cvtepi32_pd(__mmask8 __U, __m128i __A)

VCVTDQ2PD xmm {k}{z}, xmm EVEX.128 -mavx512vl

_mm256_cvtepi32_pd __m256d _mm256_cvtepi32_pd(__m128i __a)

VCVTDQ2PD ymm, xmm VEX.256 -mavx

_mm256_mask_cvtepi32_pd __m256d _mm256_mask_cvtepi32_pd(__m256d __W, __mmask8 __U, __m128i __A)

VCVTDQ2PD ymm {k}, xmm EVEX.256 -mavx512vl

_mm256_maskz_cvtepi32_pd __m256d _mm256_maskz_cvtepi32_pd(__mmask8 __U, __m128i __A)

VCVTDQ2PD ymm {k}{z}, xmm EVEX.256 -mavx512vl

_mm512_cvtepi32_pd __m512d _mm512_cvtepi32_pd(__m256i __A)

VCVTDQ2PD zmm, ymm EVEX.512 -mavx512f

_mm512_cvtepi32lo_pd __m512d _mm512_cvtepi32lo_pd(__m512i __A)

VCVTDQ2PD zmm, ymm EVEX.512 -mavx512f

_mm512_mask_cvtepi32_pd __m512d _mm512_mask_cvtepi32_pd(__m512d __W, __mmask8 __U, __m256i __A)

VCVTDQ2PD zmm {k}, ymm EVEX.512 -mavx512f

_mm512_mask_cvtepi32lo_pd __m512d _mm512_mask_cvtepi32lo_pd(__m512d __W, __mmask8 __U, __m512i __A)

VCVTDQ2PD zmm {k}, ymm EVEX.512 -mavx512f

_mm512_maskz_cvtepi32_pd __m512d _mm512_maskz_cvtepi32_pd(__mmask8 __U, __m256i __A)

VCVTDQ2PD zmm {k}{z}, ymm 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
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
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
AVX512F_128

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

or

AVX512F + AVX512VL
CPUID.(EAX=07H,ECX=0):EBX[16] AVX512F
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
AVX512F_256

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

or

AVX512F + AVX512VL
CPUID.(EAX=07H,ECX=0):EBX[16] AVX512F
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

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.