VPMOVQW/VPMOVSQW/VPMOVUSQW — Down Convert QWord to Word

Instruction Operand Encoding ¶

Description ¶

VPMOVQW down converts 64-bit integer elements in the source operand (the second operand) into packed words using truncation. VPMOVSQW converts signed 64-bit integers into packed signed words using signed saturation. VPMOVUSQW convert unsigned quad-word values into unsigned word values using unsigned saturation.

The source operand is a ZMM/YMM/XMM register. The destination operand is a XMM register or a 128/64/32-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-1:128/64/32) of the register destination are zeroed.

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

Operation ¶

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

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←TruncateQuadWordToWord (SRC[m+63: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/4] ← 0;

VPMOVQW instruction (EVEX encoded versions) when dest is memory ¶

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←TruncateQuadWordToWord (SRC[m+63:m])
        ELSE
            *DEST[i+15:i] remains unchanged* ; merging-masking
    FI;
ENDFOR

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

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←SaturateSignedQuadWordToWord (SRC[m+63: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/4] ← 0;

VPMOVSQW instruction (EVEX encoded versions) when dest is memory ¶

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←SaturateSignedQuadWordToWord (SRC[m+63:m])
        ELSE
            *DEST[i+15:i] remains unchanged* ; merging-masking
    FI;
ENDFOR

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

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←SaturateUnsignedQuadWordToWord (SRC[m+63: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/4] ← 0;

VPMOVUSQW instruction (EVEX encoded versions) when dest is memory ¶

(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j←0 TO KL-1
    i←j * 16
    m←j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+15:i]←SaturateUnsignedQuadWordToWord (SRC[m+63:m])
        ELSE
            *DEST[i+15:i] remains unchanged* ; merging-masking
    FI;
ENDFOR

Intel C/C++ Compiler Intrinsic Equivalents ¶

VPMOVQW __m128i _mm512_cvtepi64_epi16( __m512i a);

VPMOVQW __m128i _mm512_mask_cvtepi64_epi16(__m128i s, __mmask8 k, __m512i a);

VPMOVQW __m128i _mm512_maskz_cvtepi64_epi16( __mmask8 k, __m512i a);

VPMOVQW void _mm512_mask_cvtepi64_storeu_epi16(void * d, __mmask8 k, __m512i a);

VPMOVSQW __m128i _mm512_cvtsepi64_epi16( __m512i a);

VPMOVSQW __m128i _mm512_mask_cvtsepi64_epi16(__m128i s, __mmask8 k, __m512i a);

VPMOVSQW __m128i _mm512_maskz_cvtsepi64_epi16( __mmask8 k, __m512i a);

VPMOVSQW void _mm512_mask_cvtsepi64_storeu_epi16(void * d, __mmask8 k, __m512i a);

VPMOVUSQW __m128i _mm512_cvtusepi64_epi16( __m512i a);

VPMOVUSQW __m128i _mm512_mask_cvtusepi64_epi16(__m128i s, __mmask8 k, __m512i a);

VPMOVUSQW __m128i _mm512_maskz_cvtusepi64_epi16( __mmask8 k, __m512i a);

VPMOVUSQW void _mm512_mask_cvtusepi64_storeu_epi16(void * d, __mmask8 k, __m512i a);

VPMOVUSQD __m128i _mm256_cvtusepi64_epi32(__m256i a);

VPMOVUSQD __m128i _mm256_mask_cvtusepi64_epi32(__m128i a, __mmask8 k, __m256i b);

VPMOVUSQD __m128i _mm256_maskz_cvtusepi64_epi32( __mmask8 k, __m256i b);

VPMOVUSQD void _mm256_mask_cvtusepi64_storeu_epi32(void * , __mmask8 k, __m256i b);

VPMOVUSQD __m128i _mm_cvtusepi64_epi32(__m128i a);

VPMOVUSQD __m128i _mm_mask_cvtusepi64_epi32(__m128i a, __mmask8 k, __m128i b);

VPMOVUSQD __m128i _mm_maskz_cvtusepi64_epi32( __mmask8 k, __m128i b);

VPMOVUSQD void _mm_mask_cvtusepi64_storeu_epi32(void * , __mmask8 k, __m128i b);

VPMOVSQD __m128i _mm256_cvtsepi64_epi32(__m256i a);

VPMOVSQD __m128i _mm256_mask_cvtsepi64_epi32(__m128i a, __mmask8 k, __m256i b);

VPMOVSQD __m128i _mm256_maskz_cvtsepi64_epi32( __mmask8 k, __m256i b);

VPMOVSQD void _mm256_mask_cvtsepi64_storeu_epi32(void * , __mmask8 k, __m256i b);

VPMOVSQD __m128i _mm_cvtsepi64_epi32(__m128i a);

VPMOVSQD __m128i _mm_mask_cvtsepi64_epi32(__m128i a, __mmask8 k, __m128i b);

VPMOVSQD __m128i _mm_maskz_cvtsepi64_epi32( __mmask8 k, __m128i b);

VPMOVSQD void _mm_mask_cvtsepi64_storeu_epi32(void * , __mmask8 k, __m128i b);

VPMOVQD __m128i _mm256_cvtepi64_epi32(__m256i a);

VPMOVQD __m128i _mm256_mask_cvtepi64_epi32(__m128i a, __mmask8 k, __m256i b);

VPMOVQD __m128i _mm256_maskz_cvtepi64_epi32( __mmask8 k, __m256i b);

VPMOVQD void _mm256_mask_cvtepi64_storeu_epi32(void * , __mmask8 k, __m256i b);

VPMOVQD __m128i _mm_cvtepi64_epi32(__m128i a);

VPMOVQD __m128i _mm_mask_cvtepi64_epi32(__m128i a, __mmask8 k, __m128i b);

VPMOVQD __m128i _mm_maskz_cvtepi64_epi32( __mmask8 k, __m128i b);

VPMOVQD void _mm_mask_cvtepi64_storeu_epi32(void * , __mmask8 k, __m128i b);

SIMD Floating-Point Exceptions ¶

None

Other Exceptions ¶

EVEX-encoded instruction, see Exceptions Type E6.