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

Instruction Operand Encoding

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 (MAX_VL-1:128) of the corresponding ZMM destination register remain unchanged.

(E)VEX.128 encoded version: Bits (MAX_VL-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 (cid:197) 0 TO KL-1

i (cid:197) j * 64

IF k1[j] OR *no writemask*

THEN DEST[i+63:i] (cid:197) SRC[i+63:i]

ELSE

IF *merging-masking*

; merging-masking

THEN *DEST[i+63:i] remains unchanged*

ELSE DEST[i+63:i] (cid:197) 0

; zeroing-masking

FI

FI;

ENDFOR

DEST[MAX_VL-1:VL] (cid:197) 0

VMOVAPD (EVEX encoded versions, store-form)

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

FOR j (cid:197) 0 TO KL-1

i (cid:197) j * 64

IF k1[j] OR *no writemask*

THEN DEST[i+63:i](cid:197) 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 (cid:197) 0 TO KL-1

i (cid:197) j * 64

IF k1[j] OR *no writemask*

THEN DEST[i+63:i] (cid:197) SRC[i+63:i]

ELSE

IF *merging-masking*

; merging-masking

THEN *DEST[i+63:i] remains unchanged*

ELSE DEST[i+63:i] (cid:197) 0

; zeroing-masking

FI

FI;

ENDFOR

DEST[MAX_VL-1:VL] (cid:197) 0

VMOVAPD (VEX.256 encoded version, load - and register copy)

DEST[255:0] (cid:197) SRC[255:0]

DEST[MAX_VL-1:256] (cid:197) 0

VMOVAPD (VEX.256 encoded version, store-form)

DEST[255:0] (cid:197) SRC[255:0]

VMOVAPD (VEX.128 encoded version, load - and register copy)

DEST[127:0] (cid:197) SRC[127:0]

DEST[MAX_VL-1:128] (cid:197) 0

MOVAPD (128-bit load- and register-copy- form Legacy SSE version)

DEST[127:0] (cid:197) SRC[127:0]

DEST[MAX_VL-1:128] (Unmodified)

(V)MOVAPD (128-bit store-form version)

DEST[127:0] (cid:197) 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;