VEXTRACTI128/VEXTRACTI32x4/VEXTRACTI64x2/VEXTRACTI32x8/VEXTRACTI64x4 — ExtractPacked Integer Values

Opcode/Instruction	Op/En	64/32 Bit Mode Support	CPUID Feature Flag	Description
VEX.256.66.0F3A.W0 39 /r ib VEXTRACTI128 xmm1/m128, ymm2, imm8	A	V/V	AVX2	Extract 128 bits of integer data from ymm2 and store results in xmm1/m128.
EVEX.256.66.0F3A.W0 39 /r ib VEXTRACTI32X4 xmm1/m128 {k1}{z}, ymm2, imm8	C	V/V	AVX512VL AVX512F	Extract 128 bits of double-word integer values from ymm2 and store results in xmm1/m128 subject to writemask k1.
EVEX.512.66.0F3A.W0 39 /r ib VEXTRACTI32x4 xmm1/m128 {k1}{z}, zmm2, imm8	C	V/V	AVX512F	Extract 128 bits of double-word integer values from zmm2 and store results in xmm1/m128 subject to writemask k1.
EVEX.256.66.0F3A.W1 39 /r ib VEXTRACTI64X2 xmm1/m128 {k1}{z}, ymm2, imm8	B	V/V	AVX512VL AVX512DQ	Extract 128 bits of quad-word integer values from ymm2 and store results in xmm1/m128 subject to writemask k1.
EVEX.512.66.0F3A.W1 39 /r ib VEXTRACTI64X2 xmm1/m128 {k1}{z}, zmm2, imm8	B	V/V	AVX512DQ	Extract 128 bits of quad-word integer values from zmm2 and store results in xmm1/m128 subject to writemask k1.
EVEX.512.66.0F3A.W0 3B /r ib VEXTRACTI32X8 ymm1/m256 {k1}{z}, zmm2, imm8	D	V/V	AVX512DQ	Extract 256 bits of double-word integer values from zmm2 and store results in ymm1/m256 subject to writemask k1.
EVEX.512.66.0F3A.W1 3B /r ib VEXTRACTI64x4 ymm1/m256 {k1}{z}, zmm2, imm8	C	V/V	AVX512F	Extract 256 bits of quad-word integer values from zmm2 and store results in ymm1/m256 subject to writemask k1.

Instruction Operand Encoding ¶

Op/En	Tuple Type	Operand 1	Operand 2	Operand 3	Operand 4
A	N/A	ModRM:r/m (w)	ModRM:reg (r)	imm8	N/A
B	Tuple2	ModRM:r/m (w)	ModRM:reg (r)	imm8	N/A
C	Tuple4	ModRM:r/m (w)	ModRM:reg (r)	imm8	N/A
D	Tuple8	ModRM:r/m (w)	ModRM:reg (r)	imm8	N/A

Description ¶

VEXTRACTI128/VEXTRACTI32x4 and VEXTRACTI64x2 extract 128-bits of doubleword integer values from the source operand (the second operand) and store to the low 128-bit of the destination operand (the first operand). The 128-bit data extraction occurs at an 128-bit granular offset specified by imm8[0] (256-bit) or imm8[1:0] as the multiply factor. The destination may be either a vector register or an 128-bit memory location.

VEXTRACTI32x4: The low 128-bit of the destination operand is updated at 32-bit granularity according to the writemask.

VEXTRACTI64x2: The low 128-bit of the destination operand is updated at 64-bit granularity according to the writemask.

VEXTRACTI32x8 and VEXTRACTI64x4 extract 256-bits of quadword integer values from the source operand (the second operand) and store to the low 256-bit of the destination operand (the first operand). The 256-bit data extraction occurs at an 256-bit granular offset specified by imm8[0] (256-bit) or imm8[0] as the multiply factor The destination may be either a vector register or a 256-bit memory location.

VEXTRACTI32x8: The low 256-bit of the destination operand is updated at 32-bit granularity according to the writemask.

VEXTRACTI64x4: The low 256-bit of the destination operand is updated at 64-bit granularity according to the writemask.

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

The high 7 bits (6 bits in EVEX.512) of the immediate are ignored.

If VEXTRACTI128 is encoded with VEX.L= 0, an attempt to execute the instruction encoded with VEX.L= 0 will cause an #UD exception.

Operation ¶

VEXTRACTI32x4 (EVEX encoded versions) when destination is a register ¶

VL = 256, 512
IF VL = 256
    CASE (imm8[0]) OF
        0: TMP_DEST[127:0] := SRC1[127:0]
        1: TMP_DEST[127:0] := SRC1[255:128]
    ESAC.
FI;
IF VL = 512
    CASE (imm8[1:0]) OF
        00: TMP_DEST[127:0] := SRC1[127:0]
        01: TMP_DEST[127:0] := SRC1[255:128]
        10: TMP_DEST[127:0] := SRC1[383:256]
        11: TMP_DEST[127:0] := SRC1[511:384]
    ESAC.
FI;
FOR j := 0 TO 3
    i := j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] := TMP_DEST[i+31:i]
        ELSE
            IF *merging-masking*
                        ; merging-masking
                THEN *DEST[i+31:i] remains unchanged*
                ELSE *zeroing-masking*
                            ; zeroing-masking
                    DEST[i+31:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:128] := 0

VEXTRACTI32x4 (EVEX encoded versions) when destination is memory ¶

VL = 256, 512
IF VL = 256
    CASE (imm8[0]) OF
        0: TMP_DEST[127:0] := SRC1[127:0]
        1: TMP_DEST[127:0] := SRC1[255:128]
    ESAC.
FI;
IF VL = 512
    CASE (imm8[1:0]) OF
        00: TMP_DEST[127:0] := SRC1[127:0]
        01: TMP_DEST[127:0] := SRC1[255:128]
        10: TMP_DEST[127:0] := SRC1[383:256]
        11: TMP_DEST[127:0] := SRC1[511:384]
    ESAC.
FI;
FOR j := 0 TO 3
    i := j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] := TMP_DEST[i+31:i]
        ELSE *DEST[i+31:i] remains unchanged*
            ; merging-masking
    FI;
ENDFOR

VEXTRACTI64x2 (EVEX encoded versions) when destination is a register ¶

VL = 256, 512
IF VL = 256
    CASE (imm8[0]) OF
        0: TMP_DEST[127:0] := SRC1[127:0]
        1: TMP_DEST[127:0] := SRC1[255:128]
    ESAC.
FI;
IF VL = 512
    CASE (imm8[1:0]) OF
        00: TMP_DEST[127:0] := SRC1[127:0]
        01: TMP_DEST[127:0] := SRC1[255:128]
        10: TMP_DEST[127:0] := SRC1[383:256]
        11: TMP_DEST[127:0] := SRC1[511:384]
    ESAC.
FI;
FOR j := 0 TO 1
    i := j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+63:i] := TMP_DEST[i+63:i]
        ELSE
            IF *merging-masking*
                        ; merging-masking
                THEN *DEST[i+63:i] remains unchanged*
                ELSE *zeroing-masking*
                            ; zeroing-masking
                    DEST[i+63:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:128] := 0

VEXTRACTI64x2 (EVEX encoded versions) when destination is memory ¶

VL = 256, 512
IF VL = 256
    CASE (imm8[0]) OF
        0: TMP_DEST[127:0] := SRC1[127:0]
        1: TMP_DEST[127:0] := SRC1[255:128]
    ESAC.
FI;
IF VL = 512
    CASE (imm8[1:0]) OF
        00: TMP_DEST[127:0] := SRC1[127:0]
        01: TMP_DEST[127:0] := SRC1[255:128]
        10: TMP_DEST[127:0] := SRC1[383:256]
        11: TMP_DEST[127:0] := SRC1[511:384]
    ESAC.
FI;
FOR j := 0 TO 1
    i := j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+63:i] := TMP_DEST[i+63:i]
        ELSE *DEST[i+63:i] remains unchanged*
            ; merging-masking
    FI;
ENDFOR

VEXTRACTI32x8 (EVEX.U1.512 encoded version) when destination is a register ¶

VL = 512
CASE (imm8[0]) OF
    0: TMP_DEST[255:0] := SRC1[255:0]
    1: TMP_DEST[255:0] := SRC1[511:256]
ESAC.
FOR j := 0 TO 7
    i := j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] := TMP_DEST[i+31:i]
        ELSE
            IF *merging-masking*
                        ; merging-masking
                THEN *DEST[i+31:i] remains unchanged*
                ELSE *zeroing-masking*
                            ; zeroing-masking
                    DEST[i+31:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:256] := 0

VEXTRACTI32x8 (EVEX.U1.512 encoded version) when destination is memory ¶

CASE (imm8[0]) OF
    0: TMP_DEST[255:0] := SRC1[255:0]
    1: TMP_DEST[255:0] := SRC1[511:256]
ESAC.
FOR j := 0 TO 7
    i := j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] := TMP_DEST[i+31:i]
        ELSE *DEST[i+31:i] remains unchanged*
            ; merging-masking
    FI;
ENDFOR

VEXTRACTI64x4 (EVEX.512 encoded version) when destination is a register ¶

VL = 512
CASE (imm8[0]) OF
    0: TMP_DEST[255:0] := SRC1[255:0]
    1: TMP_DEST[255:0] := SRC1[511:256]
ESAC.
FOR j := 0 TO 3
    i := j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+63:i] := TMP_DEST[i+63:i]
        ELSE
            IF *merging-masking*
                        ; merging-masking
                THEN *DEST[i+63:i] remains unchanged*
                ELSE *zeroing-masking*
                            ; zeroing-masking
                    DEST[i+63:i] := 0
            FI
    FI;
ENDFOR
DEST[MAXVL-1:256] := 0

VEXTRACTI64x4 (EVEX.512 encoded version) when destination is memory ¶

CASE (imm8[0]) OF
    0: TMP_DEST[255:0] := SRC1[255:0]
    1: TMP_DEST[255:0] := SRC1[511:256]
ESAC.
FOR j := 0 TO 3
    i := j * 64
    IF k1[j] OR *no writemask*
        THEN DEST[i+63:i] := TMP_DEST[i+63:i]
        ELSE *DEST[i+63:i] remains unchanged*
            ; merging-masking
    FI;
ENDFOR

VEXTRACTI128 (memory destination form) ¶

CASE (imm8[0]) OF
    0: DEST[127:0] := SRC1[127:0]
    1: DEST[127:0] := SRC1[255:128]
ESAC.

VEXTRACTI128 (register destination form) ¶

CASE (imm8[0]) OF
    0: DEST[127:0] := SRC1[127:0]
    1: DEST[127:0] := SRC1[255:128]
ESAC.
DEST[MAXVL-1:128] := 0

Intel C/C++ Compiler Intrinsic Equivalent ¶

VEXTRACTI32x4 __m128i _mm512_extracti32x4_epi32(__m512i a, const int nidx);

VEXTRACTI32x4 __m128i _mm512_mask_extracti32x4_epi32(__m128i s, __mmask8 k, __m512i a, const int nidx);

VEXTRACTI32x4 __m128i _mm512_maskz_extracti32x4_epi32( __mmask8 k, __m512i a, const int nidx);

VEXTRACTI32x4 __m128i _mm256_extracti32x4_epi32(__m256i a, const int nidx);

VEXTRACTI32x4 __m128i _mm256_mask_extracti32x4_epi32(__m128i s, __mmask8 k, __m256i a, const int nidx);

VEXTRACTI32x4 __m128i _mm256_maskz_extracti32x4_epi32( __mmask8 k, __m256i a, const int nidx);

VEXTRACTI32x8 __m256i _mm512_extracti32x8_epi32(__m512i a, const int nidx);

VEXTRACTI32x8 __m256i _mm512_mask_extracti32x8_epi32(__m256i s, __mmask8 k, __m512i a, const int nidx);

VEXTRACTI32x8 __m256i _mm512_maskz_extracti32x8_epi32( __mmask8 k, __m512i a, const int nidx);

VEXTRACTI64x2 __m128i _mm512_extracti64x2_epi64(__m512i a, const int nidx);

VEXTRACTI64x2 __m128i _mm512_mask_extracti64x2_epi64(__m128i s, __mmask8 k, __m512i a, const int nidx);

VEXTRACTI64x2 __m128i _mm512_maskz_extracti64x2_epi64( __mmask8 k, __m512i a, const int nidx);

VEXTRACTI64x2 __m128i _mm256_extracti64x2_epi64(__m256i a, const int nidx);

VEXTRACTI64x2 __m128i _mm256_mask_extracti64x2_epi64(__m128i s, __mmask8 k, __m256i a, const int nidx);

VEXTRACTI64x2 __m128i _mm256_maskz_extracti64x2_epi64( __mmask8 k, __m256i a, const int nidx);

VEXTRACTI64x4 __m256i _mm512_extracti64x4_epi64(__m512i a, const int nidx);

VEXTRACTI64x4 __m256i _mm512_mask_extracti64x4_epi64(__m256i s, __mmask8 k, __m512i a, const int nidx);

VEXTRACTI64x4 __m256i _mm512_maskz_extracti64x4_epi64( __mmask8 k, __m512i a, const int nidx);

VEXTRACTI128 __m128i _mm256_extracti128_si256(__m256i a, int offset);

SIMD Floating-Point Exceptions ¶

None

Other Exceptions ¶

VEX-encoded instructions, see Table 2-23, “Type 6 Class Exception Conditions.”

EVEX-encoded instructions, see Table 2-54, “Type E6NF Class Exception Conditions.”

Additionally:

#UD	IF VEX.L = 0.
#UD	If VEX.vvvv != 1111B or EVEX.vvvv != 1111B.