# MOVAPD — Move Aligned Packed Double Precision Floating-Point Values

Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID Feature Flag | Description
--- | --- | --- | --- | ---
66 0F 28 /r MOVAPD xmm1, xmm2/m128 | A | V/V | SSE2 | Move aligned packed double precision floating-point values from xmm2/mem to xmm1.
66 0F 29 /r MOVAPD xmm2/m128, xmm1 | B | V/V | SSE2 | Move aligned packed double precision floating-point values from xmm1 to xmm2/mem.
VEX.128.66.0F.WIG 28 /r VMOVAPD xmm1, xmm2/m128 | A | V/V | AVX | Move aligned packed double precision floating-point values from xmm2/mem to xmm1.
VEX.128.66.0F.WIG 29 /r VMOVAPD xmm2/m128, xmm1 | B | V/V | AVX | Move aligned packed double precision floating-point values from xmm1 to xmm2/mem.
VEX.256.66.0F.WIG 28 /r VMOVAPD ymm1, ymm2/m256 | A | V/V | AVX | Move aligned packed double precision floating-point values from ymm2/mem to ymm1.
VEX.256.66.0F.WIG 29 /r VMOVAPD ymm2/m256, ymm1 | B | V/V | AVX | Move aligned packed double precision floating-point values from ymm1 to ymm2/mem.
EVEX.128.66.0F.W1 28 /r VMOVAPD xmm1 {k1}{z}, xmm2/m128 | C | V/V | AVX512VL AVX512F | Move aligned packed double precision floating-point values from xmm2/m128 to xmm1 using writemask k1.
EVEX.256.66.0F.W1 28 /r VMOVAPD ymm1 {k1}{z}, ymm2/m256 | C | V/V | AVX512VL AVX512F | Move aligned packed double precision floating-point values from ymm2/m256 to ymm1 using writemask k1.
EVEX.512.66.0F.W1 28 /r VMOVAPD zmm1 {k1}{z}, zmm2/m512 | C | V/V | AVX512F | Move aligned packed double precision floating-point values from zmm2/m512 to zmm1 using writemask k1.
EVEX.128.66.0F.W1 29 /r VMOVAPD xmm2/m128 {k1}{z}, xmm1 | D | V/V | AVX512VL AVX512F | Move aligned packed double precision floating-point values from xmm1 to xmm2/m128 using writemask k1.
EVEX.256.66.0F.W1 29 /r VMOVAPD ymm2/m256 {k1}{z}, ymm1 | D | V/V | AVX512VL AVX512F | Move aligned packed double precision floating-point values from ymm1 to ymm2/m256 using writemask k1.
EVEX.512.66.0F.W1 29 /r VMOVAPD zmm2/m512 {k1}{z}, zmm1 | D | V/V | AVX512F | Move aligned 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 ¶

Moves 2, 4 or 8 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, YMM or ZMM register from an 128-bit, 256-bit or 512-bit memory location, to store the contents of an XMM, YMM or ZMM register into a 128-bit, 256-bit or 512-bit memory location, or to move data between two XMM, two YMM or two ZMM registers.

When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte (128-bit versions), 32-byte (256-bit version) or 64-byte (EVEX.512 encoded version) boundary or a general-protection

exception (#GP) will be generated. For EVEX encoded versions, the operand must be aligned to the size of the memory operand. To move double precision floating-point values to and from unaligned memory locations, use the VMOVUPD instruction.

Note: VEX.vvvv and EVEX.vvvv are 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 512-bit float64 memory location, to store the contents of a ZMM register into a 512-bit float64 memory location, or to move data between two ZMM registers. When the source or destination operand is a memory operand, the operand must be aligned on a 64-byte boundary or a general-protection exception (#GP) will be generated. To move single precision floating-point values to and from unaligned memory locations, use the VMOVUPD instruction.

VEX.256 and EVEX.256 encoded versions:

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. When the source or destination operand is a memory operand, the operand must be aligned on a 32-byte boundary or a general-protection exception (#GP) will be generated. To move double precision floating-point values to and from unaligned memory locations, use the VMOVUPD instruction.

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. When the source or destination operand is a memory operand, the operand must be aligned on a 16-byte boundary or a general-protection exception (#GP) will be generated. To move single precision floating-point values to and from unaligned memory locations, use the VMOVUPD instruction.

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

(E)VEX.128 encoded version: Bits (MAXVL-1:128) of the destination ZMM register destination are zeroed.

## Operation ¶

### VMOVAPD (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

### VMOVAPD (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
            ELSE *DEST[i+63:i] remains unchanged*
                ; merging-masking
        FI;
    ENDFOR;

### VMOVAPD (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

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

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

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

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

### VMOVAPD (VEX.128 Encoded Version, Load - and Register Copy) ¶

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

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

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

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

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

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

    VMOVAPD __m512d _mm512_load_pd( void * m);

    VMOVAPD __m512d _mm512_mask_load_pd(__m512d s, __mmask8 k, void * m);

    VMOVAPD __m512d _mm512_maskz_load_pd( __mmask8 k, void * m);

    VMOVAPD void _mm512_store_pd( void * d, __m512d a);

    VMOVAPD void _mm512_mask_store_pd( void * d, __mmask8 k, __m512d a);

    VMOVAPD __m256d _mm256_mask_load_pd(__m256d s, __mmask8 k, void * m);

    VMOVAPD __m256d _mm256_maskz_load_pd( __mmask8 k, void * m);

    VMOVAPD void _mm256_mask_store_pd( void * d, __mmask8 k, __m256d a);

    VMOVAPD __m128d _mm_mask_load_pd(__m128d s, __mmask8 k, void * m);

    VMOVAPD __m128d _mm_maskz_load_pd( __mmask8 k, void * m);

    VMOVAPD void _mm_mask_store_pd( void * d, __mmask8 k, __m128d a);

    MOVAPD __m256d _mm256_load_pd (double * p);

    MOVAPD void _mm256_store_pd(double * p, __m256d a);

    MOVAPD __m128d _mm_load_pd (double * p);

    MOVAPD void _mm_store_pd(double * p, __m128d a);

## SIMD Floating-Point Exceptions ¶

None.

## Other Exceptions ¶

Non-EVEX-encoded instruction, see Exceptions Type1.SSE2 in Table 2-18, “Type 1 Class Exception Conditions.”

EVEX-encoded instruction, see Table 2-44, “Type E1 Class Exception Conditions.”

Additionally:

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