모두의 코드
MOVLPD (Intel x86/64 assembly instruction)
MOVLPD
Move Low Packed Double-Precision Floating-Point Value
참고 사항
아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.
Opcode/ | Op / En | 64/32 | CPUID | Description |
|---|---|---|---|---|
| RM | V/V | SSE2 | Move double-precision floating-point value from m64 to low quadword of xmm1. |
| RVM | V/V | AVX | Merge double-precision floating-point value from m64 and the high quadword of xmm1. |
| T1S | V/V | AVX512F | Merge double-precision floating-point value from m64 and the high quadword of xmm1. |
| MR | V/V | SSE2 | Move double-precision floating-point value from low quadword of xmm1 to m64. |
| MR | V/V | AVX | Move double-precision floating-point value from low quadword of xmm1 to m64. |
| T1S-MR | V/V | AVX512F | Move double-precision floating-point value from low quadword of xmm1 to m64. |
Instruction Operand Encoding
Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
|---|---|---|---|---|
RM | ModRM:reg (r, w) | ModRM:r/m (r) | NA | NA |
RVM | ModRM:r/m (r) | VEX.vvvv | ModRM:r/m (r) | NA |
MR | ModRM:r/m (w) | ModRM:reg (r) | NA | NA |
T1S | ModRM:reg (w) | EVEX.vvvv | ModRM:r/m (r) | NA |
T1S-MR | ModRM:r/m (w) | ModRM:reg (r) | NA | NA |
Description
This instruction cannot be used for register to register or memory to memory moves.
128-bit Legacy SSE load:
Moves a double-precision floating-point value from the source 64-bit memory operand and stores it in the low 64-bits of the destination XMM register. The upper 64bits of the XMM register are preserved. Bits (MAXVL-1:128) of the corresponding destination register are preserved.
VEX.128 & EVEX encoded load:
Loads a double-precision floating-point value from the source 64-bit memory operand (third operand), merges it with the upper 64-bits of the first source XMM register (second operand), and stores it in the low 128-bits of the destination XMM register (first operand). Bits (MAXVL-1:128) of the corresponding destination register are zeroed.
128-bit store:
Stores a double-precision floating-point value from the low 64-bits of the XMM register source (second operand) to the 64-bit memory location (first operand).
Note: VMOVLPD (store) (VEX.128.66.0F 13 /r) is legal and has the same behavior as the existing 66 0F 13 store. For VMOVLPD (store) VEX.vvvv and EVEX.vvvv are reserved and must be 1111b otherwise instruction will #UD.
If VMOVLPD is encoded with VEX.L or EVEX.L'L= 1, an attempt to execute the instruction encoded with VEX.L or EVEX.L'L= 1 will cause an #UD exception.
Operation
MOVLPD (128-bit Legacy SSE load)
DEST[63:0] <- SRC[63:0] DEST[MAX_VL-1:64] (Unmodified)
VMOVLPD (VEX.128 & EVEX encoded load)
DEST[63:0] <- SRC2[63:0] DEST[127:64] <- SRC1[127:64] DEST[MAX_VL-1:128] <- 0
VMOVLPD (store)
DEST[63:0] <- SRC[63:0]
Intel C/C++ Compiler Intrinsic Equivalent
MOVLPD __m128d _mm_loadl_pd(__m128d a, double *p) MOVLPD void _mm_storel_pd(double *p, __m128d a)
SIMD Floating-Point Exceptions
None
Other Exceptions
Non-EVEX-encoded instruction, see Exceptions Type 5; additionally
#UD If VEX.L = 1.
EVEX-encoded instruction, see Exceptions Type E9NF.
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