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KXNORD

Performs a bitwise XOR operation between a register and a memory operand, then performs a logical NOT operation on the result, storing the final value in the destination.

The following table specifies the supported sources and destinations:

DO NOT support LOCK

This instruction SHALL be used only in 64-bit mode. It is NOT supported in compatibility mode.

To avoid unexpected behavior, ensure that the size of the register matches the size of the memory operand (mN); mismatching operand sizes SHALL result in an invalid opcode exception.