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.