A.5.163 MOVHLPS: Move Packed Single-Precision FP High to Low
MOVHLPS xmm1,xmm2 ; OF 12 /r [KATMAI,SSE]
MOVHLPS moves the two packed single-precision FP values from the
high quadword of the source register xmm2 to the low quadword of
the destination register, xmm2. The upper quadword of xmm1 is left
unchanged.
The operation of this instruction is:
dst[0-63] := src[64-127],
dst[64-127] remains unchanged.