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Altera_Forum's avatar
Altera_Forum
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13 years ago

judgement on whether or not there is an overflow

I have 3 numbers x, y, z to be added together, each with the format of s1.14. Then the sum will be in the format of s3.14. How to make judgement on whether or not there is an overflow? If it is judg...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

the rule is :

For an N bit number

N + N = N+1 bits required.

So N + N + N requires N+2 bits. Which is what you have, hence it will never overflow.