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(nasm.info)Section B.4.9

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B.4.9. `ANDNPD': Bitwise Logical AND NOT of Packed Double-Precision FP Values
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     ANDNPD xmm1,xmm2/mem128       ; 66 0F 55 /r     [WILLAMETTE,SSE2]

   `ANDNPD' inverts the bits of the two double-precision floating-point
values in the destination register, and then performs a logical AND
between the two double-precision floating-point values in the source
operand and the temporary inverted result, storing the result in the
destination register.

        dst[0-63]   := src[0-63]   AND NOT dst[0-63],
        dst[64-127] := src[64-127] AND NOT dst[64-127].

   The destination is an `XMM' register. The source operand can be
either an `XMM' register or a 128-bit memory location.