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POR             Bitwise OR

POR destination, source                              CPU: MMX

        Logic   mm <- mm OR mm/m64

    POR performs a bitwise logical OR on 64 bits of the destination and
    source operands, and writes the result to the destination register.

    Each bit of the result is set to 0 if the corresponding bits of the
    two operands are 0. Otherwise, the bit is 1. 

    The destination operand is an MMX register. The source operand can
    either be an MMX register or a 64-bit memory operand.


    Opcode      Format
    0F EB /r    POR mm, mm/m64