MMX instruction that compares 2 64 bit values for inequality, wordwise. There is no "PCMPLT?" instruction, because you can just flip the order of the operands to the "PCMPGT?" instructions.

Note: unlike integer comparison operators, MMX comparison operators do not affect any flags.

Each word of the destination register is set to all 1's if it was greater than the corresponding word of the source register. Otherwise, it is set to all zeros.

See also: PCMPEQW, PCMPGTB, PCMPGTD

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