PADDUSB         Add Unsigned with Saturation on Byte

PADDUSB destination, source                          CPU: MMX

        Logic
        mm(7..0)   <- SaturateToUnsignedByte( mm(7..0)   + mm/m64 (7..0)  )
        mm(15..8)  <- SaturateToUnsignedByte( mm(15..8)  + mm/m64(15..8)  )
        mm(23..16) <- SaturateToUnsignedByte( mm(23..16) + mm/m64(23..16) )
        mm(31..24) <- SaturateToUnsignedByte( mm(31..24) + mm/m64(31..24) )
        mm(39..32) <- SaturateToUnsignedByte( mm(39..32) + mm/m64(39..32) )
        mm(47..40) <- SaturateToUnsignedByte( mm(47..40) + mm/m64(47..40) )
        mm(55..48) <- SaturateToUnsignedByte( mm(55..48) + mm/m64(55..48) )
        mm(63..56) <- SaturateToUnsignedByte( mm(63..56) + mm/m64(63..56) )

    PADDUSB adds the unsigned bytes of the source operand to the unsigned
    bytes of the destination operand and stores the result in destination.

    If the result is larger than the range of an unsigned byte (overflow),
    the value is saturated to 0FFh. If the result is smaller than the
    range of an unsigned byte (underflow), the value is saturated to 00h.

    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 DC /r    PADDUSB mm/m64