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Author juraj.sukop
Recipients juraj.sukop, mark.dickinson, rhettinger, serhiy.storchaka, stutzbach
Date 2021-01-28.14:08:34
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Message-id <1611842914.98.0.00807296303966.issue43053@roundup.psfhosted.org>
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Content 
The rounding down of `l` might compute more than half of the bits so that the final Heron' step in `isqrt_2` might correct the uncertain low bit if `a - (a*a > n)` is missing from `isqrt`.

As it currently stands, `a - (a*a > n)` is computed both in `isqrt` and `isqrt_2`. So I was thinking that maybe the former might be dropped.

Are you saying that both correction are need?
History
Date User Action Args
2021-01-28 14:08:35juraj.sukopsetrecipients: + juraj.sukop, rhettinger, mark.dickinson, stutzbach, serhiy.storchaka
2021-01-28 14:08:34juraj.sukopsetmessageid: <1611842914.98.0.00807296303966.issue43053@roundup.psfhosted.org>
2021-01-28 14:08:34juraj.sukoplinkissue43053 messages
2021-01-28 14:08:34juraj.sukopcreate