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(nasm.info)Section B.4.171

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B.4.171. `MOVNTDQ': Move Double Quadword Non Temporal
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     MOVNTDQ m128,xmm              ; 66 0F E7 /r     [WILLAMETTE,SSE2]

   `MOVNTDQ' moves the double quadword from the `XMM' source register
to the destination memory location, using a non-temporal hint.  This
store instruction minimizes cache pollution.