#11920: Sympow needs to disable fused-multiply-add and should create datafiles
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Reporter: jdemeyer | Owner: tbd
Type: defect | Status: positive_review
Priority: major | Milestone: sage-5.0
Component: packages | Keywords:
Work_issues: | Upstream: None of the
above - read trac for reasoning.
Reviewer: Leif Leonhardy, Volker Braun | Author: Jeroen Demeyer
Merged: | Dependencies:
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Comment(by jdemeyer):
Replying to [comment:40 vbraun]:
> Looks good to me.
>
> Incidentally, did you look at the sympow source?
No.
> Do you have an opinion on how easy it would be to replace their
troublesome quad math implementation with libquadmath?
I think libquadmath does something different from SYMPOW's "quad double".
libquadmath implements [http://en.wikipedia.org/wiki/Quadruple_precision
Quadruple precision numbers] (113 bits) whereas SYMPOW's quad double
implements something like 4*53 = 212 bits of precision.
Anyway, I don't think it's that troublesome, once you understand that it
needs IEEE-compliants doubles.
Thanks for the review!
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11920#comment:41>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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