| Re: [eigen] Decrease in performances |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Decrease in performances
- From: Rhys Ulerich <rhys.ulerich@xxxxxxxxx>
- Date: Mon, 25 Jun 2012 12:01:37 -0500
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> I guess it can easily be replaced by 128bit integer multiplication. I
> suggested that back then, but I guess it was ignored due to portability
> concerns:
> http://listengine.tuxfamily.org/lists.tuxfamily.org/eigen/2011/10/msg00041.html
For int32*int32 overflow detection on platforms lacking int128s, could
one use double*double operations and compare to
numeric_limits<int32>::max() since double can represent a seriously
wide range of integers exactly?
- Rhys