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PABSQ

PABSQ packs the lower 64 bits of a 128-bit XMM register into a general-purpose register. It extracts the low quadword from the source XMM register and stores it in the destination general-purpose register.

The table below covers the supported source and destination operands.

DO NOT support LOCK

This instruction is ONLY available in 64-bit mode. It is NOT supported in compatibility mode or 32-bit mode.

To avoid data loss or unexpected behavior, ensure the source XMM register contains the intended 64-bit value in its lower bits, as the upper 64 bits of the XMM register are ignored during the operation.