MDU unit

hello ,
i am having some problems with the multiplication division unit of the xc878 infineon microcontroller.
i am trying to do a shift operation. the number to be shifted is a 32 bit. lets say i want to do this: 0x00FB00FF >> 16. i would require the MD0,MD1,MD2,MD3 registers. now my problem. i can load the MD0 and MD1 registers but i dont know how to load the MD2 and MD3 registers. please kindly help out.
stephen

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