A.5.252 PSHUFHW: Shuffle Packed High Words
PSHUFHW xmm1,xmm2/m128,imm8 ; F3 0F 70 /r ib [WILLAMETTE,SSE2]
PSHUFW shuffles the words in the high quadword of the source (second)
operand according to the encoding specified by imm8, and stores the
result in the high quadword of the destination (first) operand.
The operation of this instruction is similar to the PSHUFW instruction,
except that the source and destination are the top quadword of a 128-bit
operand, instead of being 64-bit operands. The low quadword is copied
from the source to the destination without any changes.