Since we can't get patches included upstream, I think we should include this one in Gentoo. This bug crops up elsewhere, such as https://bugs.gentoo.org/show_bug.cgi?id=245701#c10 Please add to the glibc ebuilds.
Created attachment 200877 [details, diff] patch to fix floor, ceil, rint on alpha Please apply to 2.9_p20081201-r2 and 2.10.x.
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In glibc-2.9_p20081201-r3