VPMOVQB, VPMOVSQB, VPMOVUSQB

Down Convert QWord to Byte

stableVMJITAOTinstruction

Encodings

Opcode	Instruction	Op/En	64-bit	Compat/Legacy	Description
`EVEX.128.F3.0F38.W0 32 /r`	`VPMOVQB xmm1/m16 {k1}{z}, xmm2`	A	Valid	Valid	Converts 2 packed quad-word integers from AVX512F) OR AVX10.1 xmm2 into 2 packed byte integers in xmm1/m16 with truncation under writemask k1.
`EVEX.128.F3.0F38.W0 22 /r`	`VPMOVSQB xmm1/m16 {k1}{z}, xmm2`	A	Valid	Valid	Converts 2 packed signed quad-word integers AVX512F) OR AVX10.1 from xmm2 into 2 packed signed byte integers in xmm1/m16 using signed saturation under writemask k1.
`EVEX.128.F3.0F38.W0 12 /r`	`VPMOVUSQB xmm1/m16 {k1}{z}, xmm2`	A	Valid	Valid	Converts 2 packed unsigned quad-word AVX512F) OR integers from xmm2 into 2 packed unsigned AVX10.1 byte integers in xmm1/m16 using unsigned saturation under writemask k1.
`EVEX.256.F3.0F38.W0 32 /r`	`VPMOVQB xmm1/m32 {k1}{z}, ymm2`	A	Valid	Valid	Converts 4 packed quad-word integers from AVX512F) OR AVX10.1 ymm2 into 4 packed byte integers in xmm1/m32 with truncation under writemask k1.
`EVEX.256.F3.0F38.W0 22 /r`	`VPMOVSQB xmm1/m32 {k1}{z}, ymm2`	A	Valid	Valid	Converts 4 packed signed quad-word integers AVX512F) OR AVX10.1 from ymm2 into 4 packed signed byte integers in xmm1/m32 using signed saturation under writemask k1.
`EVEX.256.F3.0F38.W0 12 /r`	`VPMOVUSQB xmm1/m32 {k1}{z}, ymm2`	A	Valid	Valid	Converts 4 packed unsigned quad-word AVX512F) OR integers from ymm2 into 4 packed unsigned AVX10.1 byte integers in xmm1/m32 using unsigned saturation under writemask k1.
`EVEX.512.F3.0F38.W0 32 /r`	`VPMOVQB xmm1/m64 {k1}{z}, zmm2`	A	Valid	Valid	Converts 8 packed quad-word integers from OR AVX10.1 zmm2 into 8 packed byte integers in xmm1/m64 with truncation under writemask k1.
`EVEX.512.F3.0F38.W0 22 /r`	`VPMOVSQB xmm1/m64 {k1}{z}, zmm2`	A	Valid	Valid	Converts 8 packed signed quad-word integers OR AVX10.1 from zmm2 into 8 packed signed byte integers in xmm1/m64 using signed saturation under writemask k1.
`EVEX.512.F3.0F38.W0 12 /r`	`VPMOVUSQB xmm1/m64 {k1}{z}, zmm2`	A	Valid	Valid	Converts 8 packed unsigned quad-word OR AVX10.1 integers from zmm2 into 8 packed unsigned byte integers in xmm1/m64 using unsigned saturation under writemask k1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

modrm.rm escrituraModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them
modrm.reg lecturaModRM byte, reg field (bits 5-3)

Tupla: Eighth Mem

Measured cost

Loading measurements from arch-data...

Description

VPMOVQB down converts 64-bit integer elements in the source operand (the second operand) into packed byte elements using truncation. VPMOVSQB converts signed 64-bit integers into packed signed bytes using signed saturation. VPMOVUSQB convert unsigned quad-word values into unsigned byte values using unsigned saturation. The source operand is a vector register. The destination operand is an XMM register or a memory location.

Down-converted byte elements are written to the destination operand (the first operand) from the least-significant byte. Byte elements of the destination operand are updated according to the writemask. Bits (MAXVL-1:64) of the destination are zeroed.

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

Operation

VPMOVQB 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 * 8

m := j * 64

IF k1[j] OR *no writemask*

           THEN DEST[i+7:i] := TruncateQuadWordToByte (SRC[m+63:m])

           ELSE

            IF *merging-masking*             ; merging-masking

                    THEN *DEST[i+7:i] remains unchanged*

                    ELSE *zeroing-masking*   ; zeroing-masking

                    DEST[i+7:i] := 0

            FI

FI;

ENDFOR

DEST[MAXVL-1:VL/8] := 0;

VPMOVQB instruction (EVEX encoded versions) when dest is memory

(KL, VL) = (2, 128), (4, 256), (8, 512)

FOR j := 0 TO KL-1

i := j * 8

m := j * 64

IF k1[j] OR *no writemask*

           THEN DEST[i+7:i] := TruncateQuadWordToByte (SRC[m+63:m])

           ELSE

            *DEST[i+7:i] remains unchanged*  ; merging-masking

FI;

ENDFOR

VPMOVSQB 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 * 8

m := j * 64

IF k1[j] OR *no writemask*

           THEN DEST[i+7:i] := SaturateSignedQuadWordToByte (SRC[m+63:m])

           ELSE

            IF *merging-masking*             ; merging-masking

                    THEN *DEST[i+7:i] remains unchanged*

                    ELSE *zeroing-masking*   ; zeroing-masking

                    DEST[i+7:i] := 0

            FI


      FI;
ENDFOR
DEST[MAXVL-1:VL/8] := 0;

VPMOVSQB instruction (EVEX encoded versions) when dest is memory

(KL, VL) = (2, 128), (4, 256), (8, 512)

FOR j := 0 TO KL-1

i := j * 8

m := j * 64

IF k1[j] OR *no writemask*

        THEN DEST[i+7:i] := SaturateSignedQuadWordToByte (SRC[m+63:m])

        ELSE

            *DEST[i+7:i] remains unchanged*  ; merging-masking

FI;

ENDFOR

VPMOVUSQB 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 * 8

m := j * 64

IF k1[j] OR *no writemask*

        THEN DEST[i+7:i] := SaturateUnsignedQuadWordToByte (SRC[m+63:m])

        ELSE

            IF *merging-masking*             ; merging-masking

                    THEN *DEST[i+7:i] remains unchanged*

                    ELSE *zeroing-masking*   ; zeroing-masking

                    DEST[i+7:i] := 0

            FI

FI;

ENDFOR

DEST[MAXVL-1:VL/8] := 0;

VPMOVUSQB instruction (EVEX encoded versions) when dest is memory

(KL, VL) = (2, 128), (4, 256), (8, 512)

FOR j := 0 TO KL-1

i := j * 8

m := j * 64

IF k1[j] OR *no writemask*

        THEN DEST[i+7:i] := SaturateUnsignedQuadWordToByte (SRC[m+63:m])

        ELSE

            *DEST[i+7:i] remains unchanged*  ; merging-masking

FI;

ENDFOR

Intel C/C++ compiler intrinsics

VPMOVQB __m128i _mm512_cvtepi64_epi8( __m512i a);
VPMOVQB __m128i _mm512_mask_cvtepi64_epi8(__m128i s, __mmask8 k, __m512i a);
VPMOVQB __m128i _mm512_maskz_cvtepi64_epi8( __mmask8 k, __m512i a);
VPMOVQB void _mm512_mask_cvtepi64_storeu_epi8(void * d, __mmask8 k, __m512i a);
VPMOVSQB __m128i _mm512_cvtsepi64_epi8( __m512i a);
VPMOVSQB __m128i _mm512_mask_cvtsepi64_epi8(__m128i s, __mmask8 k, __m512i a);
VPMOVSQB __m128i _mm512_maskz_cvtsepi64_epi8( __mmask8 k, __m512i a);
VPMOVSQB void _mm512_mask_cvtsepi64_storeu_epi8(void * d, __mmask8 k, __m512i a);
VPMOVUSQB __m128i _mm512_cvtusepi64_epi8( __m512i a);
VPMOVUSQB __m128i _mm512_mask_cvtusepi64_epi8(__m128i s, __mmask8 k, __m512i a);
VPMOVUSQB __m128i _mm512_maskz_cvtusepi64_epi8( __mmask8 k, __m512i a);
VPMOVUSQB void _mm512_mask_cvtusepi64_storeu_epi8(void * d, __mmask8 k, __m512i a);
VPMOVUSQB __m128i _mm256_cvtusepi64_epi8(__m256i a);
VPMOVUSQB __m128i _mm256_mask_cvtusepi64_epi8(__m128i a, __mmask8 k, __m256i b);
VPMOVUSQB __m128i _mm256_maskz_cvtusepi64_epi8( __mmask8 k, __m256i b);
VPMOVUSQB void _mm256_mask_cvtusepi64_storeu_epi8(void * , __mmask8 k, __m256i b);
VPMOVUSQB __m128i _mm_cvtusepi64_epi8(__m128i a);
VPMOVUSQB __m128i _mm_mask_cvtusepi64_epi8(__m128i a, __mmask8 k, __m128i b);
VPMOVUSQB __m128i _mm_maskz_cvtusepi64_epi8( __mmask8 k, __m128i b);
VPMOVUSQB void _mm_mask_cvtusepi64_storeu_epi8(void * , __mmask8 k, __m128i b);
VPMOVSQB __m128i _mm256_cvtsepi64_epi8(__m256i a);
VPMOVSQB __m128i _mm256_mask_cvtsepi64_epi8(__m128i a, __mmask8 k, __m256i b);
VPMOVSQB __m128i _mm256_maskz_cvtsepi64_epi8( __mmask8 k, __m256i b);
VPMOVSQB void _mm256_mask_cvtsepi64_storeu_epi8(void * , __mmask8 k, __m256i b);
VPMOVSQB __m128i _mm_cvtsepi64_epi8(__m128i a);
VPMOVSQB __m128i _mm_mask_cvtsepi64_epi8(__m128i a, __mmask8 k, __m128i b);
VPMOVSQB __m128i _mm_maskz_cvtsepi64_epi8( __mmask8 k, __m128i b);
VPMOVSQB void _mm_mask_cvtsepi64_storeu_epi8(void * , __mmask8 k, __m128i b);
VPMOVQB __m128i _mm256_cvtepi64_epi8(__m256i a);
VPMOVQB __m128i _mm256_mask_cvtepi64_epi8(__m128i a, __mmask8 k, __m256i b);
VPMOVQB __m128i _mm256_maskz_cvtepi64_epi8( __mmask8 k, __m256i b);
VPMOVQB void _mm256_mask_cvtepi64_storeu_epi8(void * , __mmask8 k, __m256i b);
VPMOVQB __m128i _mm_cvtepi64_epi8(__m128i a);
VPMOVQB __m128i _mm_mask_cvtepi64_epi8(__m128i a, __mmask8 k, __m128i b);
VPMOVQB __m128i _mm_maskz_cvtepi64_epi8( __mmask8 k, __m128i b);
VPMOVQB void _mm_mask_cvtepi64_storeu_epi8(void * , __mmask8 k, __m128i b);

SIMD Floating-Point Exceptions

None.

Other Exceptions

EVEX-encoded instruction, see Table 2-55, "Type E6 Class Exception Conditions."

Additionally: If EVEX.vvvv != 1111B.

#UD

VPMOVQB, VPMOVSQB, VPMOVUSQB

Encodings

Operand encoding

A

Measured cost

Description#

Operation#

Intel C/C++ compiler intrinsics#

SIMD Floating-Point Exceptions#

Other Exceptions#

Sources

Description

Operation

Intel C/C++ compiler intrinsics

SIMD Floating-Point Exceptions

Other Exceptions