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

Instruction Operand Encoding ¶

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*
                    ; 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 Exceptions Type 4.

Note treatment of #AC varies; additionally

EVEX-encoded instruction, see Exceptions Type E4.nb.