MOVHPS—Move High Packed Single-Precision Floating-Point Values

Opcode/Instruction	Op/En	64/32-bit Mode	CPUID Feature Flag	Description
0F 16 /r MOVHPS xmm, m64	RM	V/V	SSE	Move two packed single-precision floating-point values from m64 to high quadword of xmm.
0F 17 /r MOVHPS m64, xmm	MR	V/V	SSE	Move two packed single-precision floating-point values from high quadword of xmm to m64.
VEX.NDS.128.0F.WIG 16 /r VMOVHPS xmm2, xmm1, m64	RVM	V/V	AVX	Merge two packed single-precision floating-point values from m64 and the low quadword of xmm1.
VEX.128.0F.WIG 17/r VMOVHPS m64, xmm1	MR	V/V	AVX	Move two packed single-precision floating-point values from high quadword of xmm1to 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
MR	ModRM:r/m (w)	ModRM:reg (r)	NA	NA
RVM	ModRM:reg (w)	VEX.vvvv (r)	ModRM:r/m (r)	NA

Description

This instruction cannot be used for register to register or memory to memory moves.

128-bit Legacy SSE load:

Moves two packed single-precision floating-point values from the source 64-bit memory operand and stores them in the high 64-bits of the destination XMM register. The lower 64bits of the XMM register are preserved. The upper 128-bits of the corresponding YMM destination register are preserved.

In 64-bit mode, use of the REX.R prefix permits this instruction to access additional registers (XMM8-XMM15).

VEX.128 encoded load:

Loads two single-precision floating-point values from the source 64-bit memory operand (third operand) and stores it in the upper 64-bits of the destination XMM register (first operand). The low 64-bits from second XMM register (second operand) are stored in the lower 64-bits of the destination. The upper 128-bits of the destination YMM register are zeroed.

128-bit store:

Stores two packed single-precision floating-point values from the high 64-bits of the XMM register source (second operand) to the 64-bit memory location (first operand).

Note: VMOVHPS (store) (VEX.NDS.128.0F 17 /r) is legal and has the same behavior as the existing 0F 17 store.

For VMOVHPS (store) (VEX.NDS.128.0F 17 /r) instruction version, VEX.vvvv is reserved and must be 1111b other-

wise instruction will #UD.

If VMOVHPS is encoded with VEX.L= 1, an attempt to execute the instruction encoded with VEX.L= 1 will cause an #UD exception.

Operation

MOVHPS (128-bit Legacy SSE load)

DEST[63:0] (Unmodified)
DEST[127:64] ← SRC[63:0]
DEST[VLMAX-1:128] (Unmodified)

VMOVHPS (VEX.128 encoded load)

DEST[63:0] ← SRC1[63:0]
DEST[127:64] ← SRC2[63:0]
DEST[VLMAX-1:128] ← 0

VMOVHPS (store)

DEST[63:0] ← SRC[127:64]

Intel C/C++ Compiler Intrinsic Equivalent

MOVHPS:

__m128d _mm_loadh_pi ( __m128d a, __m64 *p)

MOVHPS:

void _mm_storeh_pi (__m64 *p, __m128d a)

SIMD Floating-Point Exceptions

None.

Other Exceptions

See Exceptions Type 5; additionally

#UD	If VEX.L= 1.