# MOVUPD — Move Unaligned Packed Double Precision Floating-Point Values

Opcode/Instruction | Op / En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
66 0F 10 /r MOVUPD xmm1, xmm2/m128 | A | V/V | SSE2 | Move unaligned packed double precision floating-point from xmm2/mem to xmm1.
66 0F 11 /r MOVUPD xmm2/m128, xmm1 | B | V/V | SSE2 | Move unaligned packed double precision floating-point from xmm1 to xmm2/mem.
VEX.128.66.0F.WIG 10 /r VMOVUPD xmm1, xmm2/m128 | A | V/V | AVX | Move unaligned packed double precision floating-point from xmm2/mem to xmm1.
VEX.128.66.0F.WIG 11 /r VMOVUPD xmm2/m128, xmm1 | B | V/V | AVX | Move unaligned packed double precision floating-point from xmm1 to xmm2/mem.
VEX.256.66.0F.WIG 10 /r VMOVUPD ymm1, ymm2/m256 | A | V/V | AVX | Move unaligned packed double precision floating-point from ymm2/mem to ymm1.
VEX.256.66.0F.WIG 11 /r VMOVUPD ymm2/m256, ymm1 | B | V/V | AVX | Move unaligned packed double precision floating-point from ymm1 to ymm2/mem.
EVEX.128.66.0F.W1 10 /r VMOVUPD xmm1 {k1}{z}, xmm2/m128 | C | V/V | AVX512VL AVX512F | Move unaligned packed double precision floating-point from xmm2/m128 to xmm1 using writemask k1.
EVEX.128.66.0F.W1 11 /r VMOVUPD xmm2/m128 {k1}{z}, xmm1 | D | V/V | AVX512VL AVX512F | Move unaligned packed double precision floating-point from xmm1 to xmm2/m128 using writemask k1.
EVEX.256.66.0F.W1 10 /r VMOVUPD ymm1 {k1}{z}, ymm2/m256 | C | V/V | AVX512VL AVX512F | Move unaligned packed double precision floating-point from ymm2/m256 to ymm1 using writemask k1.
EVEX.256.66.0F.W1 11 /r VMOVUPD ymm2/m256 {k1}{z}, ymm1 | D | V/V | AVX512VL AVX512F | Move unaligned packed double precision floating-point from ymm1 to ymm2/m256 using writemask k1.
EVEX.512.66.0F.W1 10 /r VMOVUPD zmm1 {k1}{z}, zmm2/m512 | C | V/V | AVX512F | Move unaligned packed double precision floating-point values from zmm2/m512 to zmm1 using writemask k1.
EVEX.512.66.0F.W1 11 /r VMOVUPD zmm2/m512 {k1}{z}, zmm1 | D | V/V | AVX512F | Move unaligned packed double precision floating-point values from zmm1 to zmm2/m512 using writemask k1.

## Instruction Operand Encoding ¶

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

## Description ¶

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

EVEX.512 encoded version:

Moves 512 bits of packed double precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load a ZMM register from a float64 memory location, to store the contents of a ZMM register into a memory. The destination operand is updated according to the writemask.

VEX.256 encoded version:

Moves 256 bits of packed double precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load a YMM register from a 256-bit memory location, to store the contents of a YMM register into a 256-bit memory location, or to move data between two YMM registers. Bits (MAXVL-1:256) of the destination register are zeroed.

128-bit versions:

Moves 128 bits of packed double precision floating-point values from the source operand (second operand) to the destination operand (first operand). This instruction can be used to load an XMM register from a 128-bit memory location, to store the contents of an XMM register into a 128-bit memory location, or to move data between two XMM registers.

128-bit Legacy SSE version: Bits (MAXVL-1:128) of the corresponding destination register remain unchanged.

When the source or destination operand is a memory operand, the operand may be unaligned on a 16-byte boundary without causing a general-protection exception (#GP) to be generated

VEX.128 and EVEX.128 encoded versions: Bits (MAXVL-1:128) of the destination register are zeroed.

## Operation ¶

### VMOVUPD (EVEX Encoded Versions, Register-Copy Form) ¶

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

### VMOVUPD (EVEX Encoded Versions, Store-Form) ¶

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

### VMOVUPD (EVEX Encoded Versions, Load-Form) ¶

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

### VMOVUPD (VEX.256 Encoded Version, Load - and Register Copy) ¶

    DEST[255:0] := SRC[255:0]
    DEST[MAXVL-1:256] := 0

### VMOVUPD (VEX.256 Encoded Version, Store-Form) ¶

    DEST[255:0] := SRC[255:0]

### VMOVUPD (VEX.128 Encoded Version) ¶

    DEST[127:0] := SRC[127:0]
    DEST[MAXVL-1:128] := 0

### MOVUPD (128-bit Load- and Register-Copy- Form Legacy SSE Version) ¶

    DEST[127:0] := SRC[127:0]
    DEST[MAXVL-1:128] (Unmodified)

### (V)MOVUPD (128-bit Store-Form Version) ¶

    DEST[127:0] := SRC[127:0]

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

    VMOVUPD __m512d _mm512_loadu_pd( void * s);

    VMOVUPD __m512d _mm512_mask_loadu_pd(__m512d a, __mmask8 k, void * s);

    VMOVUPD __m512d _mm512_maskz_loadu_pd( __mmask8 k, void * s);

    VMOVUPD void _mm512_storeu_pd( void * d, __m512d a);

    VMOVUPD void _mm512_mask_storeu_pd( void * d, __mmask8 k, __m512d a);

    VMOVUPD __m256d _mm256_mask_loadu_pd(__m256d s, __mmask8 k, void * m);

    VMOVUPD __m256d _mm256_maskz_loadu_pd( __mmask8 k, void * m);

    VMOVUPD void _mm256_mask_storeu_pd( void * d, __mmask8 k, __m256d a);

    VMOVUPD __m128d _mm_mask_loadu_pd(__m128d s, __mmask8 k, void * m);

    VMOVUPD __m128d _mm_maskz_loadu_pd( __mmask8 k, void * m);

    VMOVUPD void _mm_mask_storeu_pd( void * d, __mmask8 k, __m128d a);

    MOVUPD __m256d _mm256_loadu_pd (double * p);

    MOVUPD void _mm256_storeu_pd( double *p, __m256d a);

    MOVUPD __m128d _mm_loadu_pd (double * p);

    MOVUPD void _mm_storeu_pd( double *p, __m128d a);

## SIMD Floating-Point Exceptions ¶

None.

## Other Exceptions ¶

Non-EVEX-encoded instruction, see Table 2-21, “Type 4 Class Exception Conditions.”

Note treatment of #AC varies; additionally:

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

EVEX-encoded instruction, see Exceptions Type E4.nb in Table 2-49, “Type E4 Class Exception Conditions.”