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(nasm.info)Section B.4.323

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B.4.323. `UNPCKHPS': Unpack and Interleave High Packed Single-Precision FP Values
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     UNPCKHPS xmm1,xmm2/m128       ; 0F 15 /r        [KATMAI,SSE]

   `UNPCKHPS' performs an interleaved unpack of the high-order data
elements of the source and destination operands, saving the result in
`xmm1'. It ignores the lower half of the sources.

   The operation of this instruction is:

        dst[31-0]   := dst[95-64];
        dst[63-32]  := src[95-64];
        dst[95-64]  := dst[127-96];
        dst[127-96] := src[127-96].