[Bug 237800] pow(3) returns inaccurate results

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Thu May 9 17:31:00 UTC 2019


--- Comment #8 from sgk at troutmask.apl.washington.edu ---
(In reply to Karl Williamson from comment #6)


Thanks for the follow-up.  FreeBSD setting up bugzilla
to kill the ability to reply via email is rather dumb

To the matter at hand, checking for equality between
computed floating point values is not a Good Thing.
One normally checks either the ULP as I have done, or
a relative error such as "abs(x - y) / abs(x)" is
less than some tiny value.

It seems that whomever is developing the perl
module should read Goldberg's paper.


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