NASM 2.05 based x86 Instruction Reference[ch190]
A.5.168 MOVLPS: Move Low Packed Single-Precision FP MOVLPS xmm,m64 ; OF 12 /r [KATMAI,SSE] MOVLPS m64,xmm ; OF 13 /r [KATMAI,SSE] MOVLPS moves two packed single-precision FP values between the source and destination operands. One of the operands is a 64-bit memory location, the other is the low quadword of an XMM register. The operation of this instruction is: mem(0-63) := xmm(0-63); or xmm(0-63) := mem(0-63); xmm(64-127) remains unchanged.