The **%y** register is used to hold to 32 most significant bits from the result of multiplication and the 32 most significant bits of the dividend for division. It is up to the programmer to make sure that the value of the **%y** register is both examined for multiplication and set properly for division.

add addcc addx addxcc sdiv sdivcc smul smulcc sub subcc subx subxcc udiv udivcc umul umulcc

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