#65 Bit Extender in "Sign" mode should have additional input

open
nobody
None
6
2011-03-23
2011-03-23
Ilia Lilov
No

While adding two signed (2-complement) values, and they both are negative, we need to know adder's carry out bit to perform sign extending correctly. So I suggest to add carry bit input for Bit Extender in "Sign" mode. Attached circuit demonstrates current wrong behavior and how to solve the problem.

Discussion

  • Ilia Lilov
    Ilia Lilov
    2011-03-23

    • priority: 5 --> 6