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(nasm.info)Section B.4.175

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B.4.175. `MOVNTQ': Move Quadword Non Temporal
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     MOVNTQ m64,mm                 ; 0F E7 /r        [KATMAI,MMX]

   `MOVNTQ' moves the quadword in the `MMX' source register to the
destination memory location, using a non-temporal hint. This store
instruction minimizes cache pollution.