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(nasm.info)Section B.4.42

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B.4.42. `CVTPS2DQ': Packed Single-Precision FP to Packed Signed INT32 Conversion
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     CVTPS2DQ xmm1,xmm2/mem128     ; 66 0F 5B /r     [WILLAMETTE,SSE2]

   `CVTPS2DQ' converts four packed single-precision FP values from the
source operand to four packed signed doublewords in the destination
operand.

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

   For more details of this instruction, see the Intel Processor
manuals.