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Instruction mmx - PAND—Logical AND

Performs a bitwise logical AND operation on the quadword source (second) and destination (first) operands and stores the result in the destination operand location. The source operand can be an MMX technology register or a quadword memory location; the destination operand must be an MMX technology register. Each bit of the result of the PAND instruction is set to 1 if the corresponding bits of the operands are both 1; otherwise it is made zero.