In my long task of getting sage on Gentoo I
inspect spkg. So today I was creating an ebuild
for quaddouble and looked at the config options
available and the one used by sage and I see this:
--enable-ieee-add use addition that satisfies IEEE-style error
bound
instead of Cray-style error bound.
[default=no]
--enable-sloppy-mul use fast but slightly inaccurate
multiplication.
[default=yes]
--enable-sloppy-div use fast but slightly inaccurate division.
[default=yes]
None of these are changed from the default in
quaddouble spkg-install, which means that sage
use the sloppy options and Cray-style error bound.
Is it really what we want in sage?
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