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发表于 2009-1-21 14:00:11
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First, you should believe that the Booth is more friendly for signed than unsigned.
Then, after booth encoding, all data are signed, you should be care for this point.
Next, the signed/unsigned result depends on your definition, or it depends on booth encoding. It is coincide with the input data.
Next, You should know NxN's result is less than ((1<<2N)-1), so, the overflow is always false.
If you want N bits result of NxN mul, all result above ((1<<N)-1) is overflow. |
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