A.5.164 MOVHPD: Move High Packed Double-Precision FP
MOVHPD xmm,m64 ; 66 OF 16 /r [WILLAMETTE,SSE2]
MOVHPD m64,xmm ; 66 OF 17 /r [WILLAMETTE,SSE2]
MOVHPD 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 high quadword of an XMM register.
The operation of this instruction is:
mem[0-63] := xmm[64-127];
or
xmm[0-63] remains unchanged;
xmm[64-127] := mem[0-63].