A.5.167 MOVLPD: Move Low Packed Double-Precision FP
MOVLPD xmm,m64 ; 66 OF 12 /r [WILLAMETTE,SSE2]
MOVLPD m64,xmm ; 66 OF 13 /r [WILLAMETTE,SSE2]
MOVLPD moves a double-precision FP value 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.