#16997: Upgrade PARI to git master
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Reporter: jdemeyer | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-6.6
Component: packages: | Resolution:
standard | Merged in:
Keywords: | Reviewers: François Bissey
Authors: Jeroen Demeyer | Work issues:
Report Upstream: N/A | Commit:
Branch: | 73e4040bc212753a9549688bfe5189a48df8be96
u/jdemeyer/ticket/16997 | Stopgaps:
Dependencies: #16976 |
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Comment (by jdemeyer):
Replying to [comment:92 zimmerma]:
> > but all 32-bit and all 64-bit systems should be the same).
>
> I would not bet on this. It suffices that some processor provides a
fused multiply-add and
> that Pari uses it to get different results.
As far as I know, PARI doesn't use native floating-point operations. They
use custom arbitrary-precision arithmetic which shouldn't depend on the
system.
The reason there is a difference between 32-bit and 64-bit is because
their precision is measured in words: some computation which would use 96
bits on a 32-bit system would use 128 bits on a 64-bit system.
--
Ticket URL: <http://trac.sagemath.org/ticket/16997#comment:93>
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