# VPMOVDW/VPMOVSDW/VPMOVUSDW — Down Convert DWord to Word

Opcode/Instruction | Op / En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
EVEX.128.F3.0F38.W0 33 /r VPMOVDW xmm1/m64 {k1}{z}, xmm2 | A | V/V | AVX512VL AVX512F | Converts 4 packed double-word integers from xmm2 into 4 packed word integers in xmm1/m64 with truncation under writemask k1.
EVEX.128.F3.0F38.W0 23 /r VPMOVSDW xmm1/m64 {k1}{z}, xmm2 | A | V/V | AVX512VL AVX512F | Converts 4 packed signed double-word integers from xmm2 into 4 packed signed word integers in ymm1/m64 using signed saturation under writemask k1.
EVEX.128.F3.0F38.W0 13 /r VPMOVUSDW xmm1/m64 {k1}{z}, xmm2 | A | V/V | AVX512VL AVX512F | Converts 4 packed unsigned double-word integers from xmm2 into 4 packed unsigned word integers in xmm1/m64 using unsigned saturation under writemask k1.
EVEX.256.F3.0F38.W0 33 /r VPMOVDW xmm1/m128 {k1}{z}, ymm2 | A | V/V | AVX512VL AVX512F | Converts 8 packed double-word integers from ymm2 into 8 packed word integers in xmm1/m128 with truncation under writemask k1.
EVEX.256.F3.0F38.W0 23 /r VPMOVSDW xmm1/m128 {k1}{z}, ymm2 | A | V/V | AVX512VL AVX512F | Converts 8 packed signed double-word integers from ymm2 into 8 packed signed word integers in xmm1/m128 using signed saturation under writemask k1.
EVEX.256.F3.0F38.W0 13 /r VPMOVUSDW xmm1/m128 {k1}{z}, ymm2 | A | V/V | AVX512VL AVX512F | Converts 8 packed unsigned double-word integers from ymm2 into 8 packed unsigned word integers in xmm1/m128 using unsigned saturation under writemask k1.
EVEX.512.F3.0F38.W0 33 /r VPMOVDW ymm1/m256 {k1}{z}, zmm2 | A | V/V | AVX512F | Converts 16 packed double-word integers from zmm2 into 16 packed word integers in ymm1/m256 with truncation under writemask k1.
EVEX.512.F3.0F38.W0 23 /r VPMOVSDW ymm1/m256 {k1}{z}, zmm2 | A | V/V | AVX512F | Converts 16 packed signed double-word integers from zmm2 into 16 packed signed word integers in ymm1/m256 using signed saturation under writemask k1.
EVEX.512.F3.0F38.W0 13 /r VPMOVUSDW ymm1/m256 {k1}{z}, zmm2 | A | V/V | AVX512F | Converts 16 packed unsigned double-word integers from zmm2 into 16 packed unsigned word integers in ymm1/m256 using unsigned saturation under writemask k1.

## Instruction Operand Encoding ¶

Op/En | Tuple Type | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
A | Half Mem | ModRM:r/m (w) | ModRM:reg (r) | N/A | N/A

### Description ¶

VPMOVDW down converts 32-bit integer elements in the source operand (the second operand) into packed words using truncation. VPMOVSDW converts signed 32-bit integers into packed signed words using signed saturation. VPMOVUSDW convert unsigned double-word values into unsigned word values using unsigned saturation.

The source operand is a ZMM/YMM/XMM register. The destination operand is a YMM/XMM/XMM register or a 256/128/64-bit memory location.

Down-converted word elements are written to the destination operand (the first operand) from the least-significant word. Word elements of the destination operand are updated according to the writemask. Bits (MAXVL-1:256/128/64) of the register destination are zeroed.

EVEX.vvvv is reserved and must be 1111b otherwise instructions will #UD.

### Operation ¶

#### VPMOVDW instruction (EVEX encoded versions) when dest is a register ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := TruncateDoubleWordToWord (SRC[m+31:m])
            ELSE
                IF *merging-masking* ; merging-masking
                    THEN *DEST[i+15:i] remains unchanged*
                    ELSE *zeroing-masking*
                            ; zeroing-masking
                        DEST[i+15:i] := 0
                FI
        FI;
    ENDFOR
    DEST[MAXVL-1:VL/2] := 0;

#### VPMOVDW instruction (EVEX encoded versions) when dest is memory ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := TruncateDoubleWordToWord (SRC[m+31:m])
            ELSE
                *DEST[i+15:i] remains unchanged* ; merging-masking
        FI;
    ENDFOR

#### VPMOVSDW instruction (EVEX encoded versions) when dest is a register ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := SaturateSignedDoubleWordToWord (SRC[m+31:m])
            ELSE
                IF *merging-masking* ; merging-masking
                    THEN *DEST[i+15:i] remains unchanged*
                    ELSE *zeroing-masking*
                            ; zeroing-masking
                        DEST[i+15:i] := 0
                FI
        FI;
    ENDFOR
    DEST[MAXVL-1:VL/2] := 0;

#### VPMOVSDW instruction (EVEX encoded versions) when dest is memory ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := SaturateSignedDoubleWordToWord (SRC[m+31:m])
            ELSE
                *DEST[i+15:i] remains unchanged* ; merging-masking
        FI;
    ENDFOR

#### VPMOVUSDW instruction (EVEX encoded versions) when dest is a register ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := SaturateUnsignedDoubleWordToWord (SRC[m+31:m])
            ELSE
                IF *merging-masking* ; merging-masking
                    THEN *DEST[i+15:i] remains unchanged*
                    ELSE *zeroing-masking*
                            ; zeroing-masking
                        DEST[i+15:i] := 0
                FI
        FI;
    ENDFOR
    DEST[MAXVL-1:VL/2] := 0;

#### VPMOVUSDW instruction (EVEX encoded versions) when dest is memory ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j * 16
        m := j * 32
        IF k1[j] OR *no writemask*
            THEN DEST[i+15:i] := SaturateUnsignedDoubleWordToWord (SRC[m+31:m])
            ELSE
                *DEST[i+15:i] remains unchanged*
                    ; merging-masking
        FI;
    ENDFOR

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

    VPMOVDW __m256i _mm512_cvtepi32_epi16( __m512i a);

    VPMOVDW __m256i _mm512_mask_cvtepi32_epi16(__m256i s, __mmask16 k, __m512i a);

    VPMOVDW __m256i _mm512_maskz_cvtepi32_epi16( __mmask16 k, __m512i a);

    VPMOVDW void _mm512_mask_cvtepi32_storeu_epi16(void * d, __mmask16 k, __m512i a);

    VPMOVSDW __m256i _mm512_cvtsepi32_epi16( __m512i a);

    VPMOVSDW __m256i _mm512_mask_cvtsepi32_epi16(__m256i s, __mmask16 k, __m512i a);

    VPMOVSDW __m256i _mm512_maskz_cvtsepi32_epi16( __mmask16 k, __m512i a);

    VPMOVSDW void _mm512_mask_cvtsepi32_storeu_epi16(void * d, __mmask16 k, __m512i a);

    VPMOVUSDW __m256i _mm512_cvtusepi32_epi16 __m512i a);

    VPMOVUSDW __m256i _mm512_mask_cvtusepi32_epi16(__m256i s, __mmask16 k, __m512i a);

    VPMOVUSDW __m256i _mm512_maskz_cvtusepi32_epi16( __mmask16 k, __m512i a);

    VPMOVUSDW void _mm512_mask_cvtusepi32_storeu_epi16(void * d, __mmask16 k, __m512i a);

    VPMOVUSDW __m128i _mm256_cvtusepi32_epi16(__m256i a);

    VPMOVUSDW __m128i _mm256_mask_cvtusepi32_epi16(__m128i a, __mmask8 k, __m256i b);

    VPMOVUSDW __m128i _mm256_maskz_cvtusepi32_epi16( __mmask8 k, __m256i b);

    VPMOVUSDW void _mm256_mask_cvtusepi32_storeu_epi16(void * , __mmask8 k, __m256i b);

    VPMOVUSDW __m128i _mm_cvtusepi32_epi16(__m128i a);

    VPMOVUSDW __m128i _mm_mask_cvtusepi32_epi16(__m128i a, __mmask8 k, __m128i b);

    VPMOVUSDW __m128i _mm_maskz_cvtusepi32_epi16( __mmask8 k, __m128i b);

    VPMOVUSDW void _mm_mask_cvtusepi32_storeu_epi16(void * , __mmask8 k, __m128i b);

    VPMOVSDW __m128i _mm256_cvtsepi32_epi16(__m256i a);

    VPMOVSDW __m128i _mm256_mask_cvtsepi32_epi16(__m128i a, __mmask8 k, __m256i b);

    VPMOVSDW __m128i _mm256_maskz_cvtsepi32_epi16( __mmask8 k, __m256i b);

    VPMOVSDW void _mm256_mask_cvtsepi32_storeu_epi16(void * , __mmask8 k, __m256i b);

    VPMOVSDW __m128i _mm_cvtsepi32_epi16(__m128i a);

    VPMOVSDW __m128i _mm_mask_cvtsepi32_epi16(__m128i a, __mmask8 k, __m128i b);

    VPMOVSDW __m128i _mm_maskz_cvtsepi32_epi16( __mmask8 k, __m128i b);

    VPMOVSDW void _mm_mask_cvtsepi32_storeu_epi16(void * , __mmask8 k, __m128i b);

    VPMOVDW __m128i _mm256_cvtepi32_epi16(__m256i a);

    VPMOVDW __m128i _mm256_mask_cvtepi32_epi16(__m128i a, __mmask8 k, __m256i b);

    VPMOVDW __m128i _mm256_maskz_cvtepi32_epi16( __mmask8 k, __m256i b);

    VPMOVDW void _mm256_mask_cvtepi32_storeu_epi16(void * , __mmask8 k, __m256i b);

    VPMOVDW __m128i _mm_cvtepi32_epi16(__m128i a);

    VPMOVDW __m128i _mm_mask_cvtepi32_epi16(__m128i a, __mmask8 k, __m128i b);

    VPMOVDW __m128i _mm_maskz_cvtepi32_epi16( __mmask8 k, __m128i b);

    VPMOVDW void _mm_mask_cvtepi32_storeu_epi16(void * , __mmask8 k, __m128i b);

### SIMD Floating-Point Exceptions ¶

None.

### Other Exceptions ¶

EVEX-encoded instruction, see Table 2-53, “Type E6 Class Exception Conditions.”

Additionally:

#UD | If EVEX.vvvv != 1111B.