carry flag and subtraction issue!

Posted by Zia ur Rahman on Stack Overflow See other posts from Stack Overflow or by Zia ur Rahman
Published on 2010-05-17T17:50:48Z Indexed on 2010/05/17 18:00 UTC
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If a large number is subtracted from a smaller number then borrow is needed. The carry flag plays the role of borrow during the subtraction operation. Now suppose we want to subtract 56 from 66, obviously the borrow is needed and carry flag will be set. Now how this subtraction is performed to get the result -10, how computer will distinguish that the result is going to be a negative number. Please explain the process.

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Developer IT

carry flag and subtraction issue! - Developer IT

carry flag and subtraction issue!

assembly

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