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11. Signed Numbers Addition, Cont.

  •  

    INPUTS OUTPUTS
    Asign Bsign CARRY IN CARRY OUT SUMsign OVERFLOW
    0 0 0 0 0 0
    0 0 1 0 1 ?
    0 1 0 0 1 0
    0 1 1 1 0 0
    1 0 0 0 1 0
    1 0 1 1 0 0
    1 1 0 1 0 ?
    1 1 1 1 1 0

  •  

  • There is no overflow, if:

    • both operands are positive and the sum is positive.

    • both operands are negative and the sum is negative.

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