Movsldup-move packed single-fp low and duplicate, Movsldup—move packed single-fp low and duplicate – Intel 253666-024US User Manual

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Vol. 2A 3-679

INSTRUCTION SET REFERENCE, A-M

MOVSLDUP—Move Packed Single-FP Low and Duplicate

Description

The linear address corresponds to the address of the least-significant byte of the
referenced memory data. When a memory address is indicated, the 16 bytes of data
at memory location m128 are loaded and the single-precision elements in positions 0
and 2 are duplicated. When the register-register form of this operation is used, the
same operation is performed but with data coming from the 128-bit source register.
See Figure 3-16.

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

Opcode

Instruction

64-Bit

Mode

Compat/

Leg Mode

Description

F3 0F 12 /r MOVSLDUP xmm1,

xmm2/m128

Valid

Move two single-precision floating-point

values from the lower 32-bit operand of

each qword in xmm2/m128 to xmm1

and duplicate each 32-bit operand to

the higher 32-bits of each qword.

Figure 3-16. MOVSLDUP—Move Packed Single-FP Low and Duplicate

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