Re: New math test failures on Fedora/33

[Paul Zimmermann <Paul.Zimmermann@inria.fr>]

       Dear Wilco,

> On the subject of ULPs, how about centralizing the ULP files into a single
> generic file and only adding entries to target ULP files for special cases?
> More of the math functions are becoming generic and so the ULPs should be
> the same for most (some entries might need fma and non-fma variants of course).
> Then you only need the target versions for special cases like non-standard IEEE
> formats, target specific implementations with different ULPs etc.
> 
> And if there aren't that many special cases you could use a single file with
> a syntax like:
> 
> Function: "acos":
> float: 1            // generic case
> float-alpha: 2

good idea! One question: when one does "make regen-ulps", how would it know which
value to update? For each function, we would need to tag it as "generic" or not on
each target?

By the way, "make regen-ulps" gives a diff if the new ulps are larger, but does it
also when the new ulps are smaller (for example if we improved the algorithm)?

Paul