# VPSHLDV — Concatenate and Variable Shift Packed Data Left Logical

Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
EVEX.128.66.0F38.W1 70 /r VPSHLDVW xmm1{k1}{z}, xmm2, xmm3/m128 | A | V/V | AVX512_VBMI2 AVX512VL | Concatenate xmm1 and xmm2, extract result shifted to the left by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W1 70 /r VPSHLDVW ymm1{k1}{z}, ymm2, ymm3/m256 | A | V/V | AVX512_VBMI2 AVX512VL | Concatenate ymm1 and ymm2, extract result shifted to the left by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W1 70 /r VPSHLDVW zmm1{k1}{z}, zmm2, zmm3/m512 | A | V/V | AVX512_VBMI2 | Concatenate zmm1 and zmm2, extract result shifted to the left by value in zmm3/m512 into zmm1.
EVEX.128.66.0F38.W0 71 /r VPSHLDVD xmm1{k1}{z}, xmm2, xmm3/m128/m32bcst | B | V/V | AVX512_VBMI2 AVX512VL | Concatenate xmm1 and xmm2, extract result shifted to the left by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W0 71 /r VPSHLDVD ymm1{k1}{z}, ymm2, ymm3/m256/m32bcst | B | V/V | AVX512_VBMI2 AVX512VL | Concatenate ymm1 and ymm2, extract result shifted to the left by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W0 71 /r VPSHLDVD zmm1{k1}{z}, zmm2, zmm3/m512/m32bcst | B | V/V | AVX512_VBMI2 | Concatenate zmm1 and zmm2, extract result shifted to the left by value in zmm3/m512 into zmm1.
EVEX.128.66.0F38.W1 71 /r VPSHLDVQ xmm1{k1}{z}, xmm2, xmm3/m128/m64bcst | B | V/V | AVX512_VBMI2 AVX512VL | Concatenate xmm1 and xmm2, extract result shifted to the left by value in xmm3/m128 into xmm1.
EVEX.256.66.0F38.W1 71 /r VPSHLDVQ ymm1{k1}{z}, ymm2, ymm3/m256/m64bcst | B | V/V | AVX512_VBMI2 AVX512VL | Concatenate ymm1 and ymm2, extract result shifted to the left by value in xmm3/m256 into ymm1.
EVEX.512.66.0F38.W1 71 /r VPSHLDVQ zmm1{k1}{z}, zmm2, zmm3/m512/m64bcst | B | V/V | AVX512_VBMI2 | Concatenate zmm1 and zmm2, extract result shifted to the left by value in zmm3/m512 into zmm1.

## Instruction Operand Encoding ¶

Op/En | Tuple | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
A | Full Mem | ModRM:reg (r, w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A
B | Full | ModRM:reg (r, w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A

### Description ¶

Concatenate packed data, extract result shifted to the left by variable value.

This instruction supports memory fault suppression.

### Operation ¶

    FUNCTION concat(a,b):
        IF words:
            d.word[1] := a
            d.word[0] := b
            return d
        ELSE IF dwords:
            q.dword[1] := a
            q.dword[0] := b
            return q
        ELSE IF qwords:
            o.qword[1] := a
            o.qword[0] := b
            return o

#### VPSHLDVW DEST, SRC2, SRC3 ¶

    (KL, VL) = (8, 128), (16, 256), (32, 512)
    FOR j := 0 TO KL-1:
        IF MaskBit(j) OR *no writemask*:
            tmp := concat(DEST.word[j], SRC2.word[j]) << (SRC3.word[j] & 15)
            DEST.word[j] := tmp.word[1]
        ELSE IF *zeroing*:
            DEST.word[j] := 0
        *ELSE DEST.word[j] remains unchanged*
    DEST[MAX_VL-1:VL] := 0

#### VPSHLDVD DEST, SRC2, SRC3 ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1:
        IF SRC3 is broadcast memop:
            tsrc3 := SRC3.dword[0]
        ELSE:
            tsrc3 := SRC3.dword[j]
        IF MaskBit(j) OR *no writemask*:
            tmp := concat(DEST.dword[j], SRC2.dword[j]) << (tsrc3 & 31)
            DEST.dword[j] := tmp.dword[1]
        ELSE IF *zeroing*:
            DEST.dword[j] := 0
        *ELSE DEST.dword[j] remains unchanged*
    DEST[MAX_VL-1:VL] := 0

#### VPSHLDVQ DEST, SRC2, SRC3 ¶

    (KL, VL) = (2, 128), (4, 256), (8, 512)
    FOR j := 0 TO KL-1:
        IF SRC3 is broadcast memop:
            tsrc3 := SRC3.qword[0]
        ELSE:
            tsrc3 := SRC3.qword[j]
        IF MaskBit(j) OR *no writemask*:
            tmp := concat(DEST.qword[j], SRC2.qword[j]) << (tsrc3 & 63)
            DEST.qword[j] := tmp.qword[1]
        ELSE IF *zeroing*:
            DEST.qword[j] := 0
        *ELSE DEST.qword[j] remains unchanged*
    DEST[MAX_VL-1:VL] := 0

### Intel C/C++ Compiler Intrinsic Equivalent ¶

    VPSHLDVW __m128i _mm_shldv_epi16(__m128i, __m128i, __m128i);

    VPSHLDVW __m128i _mm_mask_shldv_epi16(__m128i, __mmask8, __m128i, __m128i);

    VPSHLDVW __m128i _mm_maskz_shldv_epi16(__mmask8, __m128i, __m128i, __m128i);

    VPSHLDVW __m256i _mm256_shldv_epi16(__m256i, __m256i, __m256i);

    VPSHLDVW __m256i _mm256_mask_shldv_epi16(__m256i, __mmask16, __m256i, __m256i);

    VPSHLDVW __m256i _mm256_maskz_shldv_epi16(__mmask16, __m256i, __m256i, __m256i);

    VPSHLDVQ __m512i _mm512_shldv_epi64(__m512i, __m512i, __m512i);

    VPSHLDVQ __m512i _mm512_mask_shldv_epi64(__m512i, __mmask8, __m512i, __m512i);

    VPSHLDVQ __m512i _mm512_maskz_shldv_epi64(__mmask8, __m512i, __m512i, __m512i);

    VPSHLDVW __m128i _mm_shldv_epi16(__m128i, __m128i, __m128i);

    VPSHLDVW __m128i _mm_mask_shldv_epi16(__m128i, __mmask8, __m128i, __m128i);

    VPSHLDVW __m128i _mm_maskz_shldv_epi16(__mmask8, __m128i, __m128i, __m128i);

    VPSHLDVW __m256i _mm256_shldv_epi16(__m256i, __m256i, __m256i);

    VPSHLDVW __m256i _mm256_mask_shldv_epi16(__m256i, __mmask16, __m256i, __m256i);

    VPSHLDVW __m256i _mm256_maskz_shldv_epi16(__mmask16, __m256i, __m256i, __m256i);

    VPSHLDVW __m512i _mm512_shldv_epi16(__m512i, __m512i, __m512i);

    VPSHLDVW __m512i _mm512_mask_shldv_epi16(__m512i, __mmask32, __m512i, __m512i);

    VPSHLDVW __m512i _mm512_maskz_shldv_epi16(__mmask32, __m512i, __m512i, __m512i);

    VPSHLDVD __m128i _mm_shldv_epi32(__m128i, __m128i, __m128i);

    VPSHLDVD __m128i _mm_mask_shldv_epi32(__m128i, __mmask8, __m128i, __m128i);

    VPSHLDVD __m128i _mm_maskz_shldv_epi32(__mmask8, __m128i, __m128i, __m128i);

    VPSHLDVD __m256i _mm256_shldv_epi32(__m256i, __m256i, __m256i);

    VPSHLDVD __m256i _mm256_mask_shldv_epi32(__m256i, __mmask8, __m256i, __m256i);

    VPSHLDVD __m256i _mm256_maskz_shldv_epi32(__mmask8, __m256i, __m256i, __m256i);

    VPSHLDVD __m512i _mm512_shldv_epi32(__m512i, __m512i, __m512i);

    VPSHLDVD __m512i _mm512_mask_shldv_epi32(__m512i, __mmask16, __m512i, __m512i);

    VPSHLDVD __m512i _mm512_maskz_shldv_epi32(__mmask16, __m512i, __m512i, __m512i);

### SIMD Floating-Point Exceptions ¶

None.

### Other Exceptions ¶

See Table 2-49, “Type E4 Class Exception Conditions.”