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[Bug math/13942] x86 acos inaccurate near 1
- From: "joseph at codesourcery dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Thu, 05 Apr 2012 00:12:54 +0000
- Subject: [Bug math/13942] x86 acos inaccurate near 1
- Auto-submitted: auto-generated
- References: <bug-13942-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=13942
--- Comment #6 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-04-05 00:12:54 UTC ---
fabs instructions could be used to avoid issues with sqrt(-0) = -0 (if
that's the round-downward issue you mean) and may be cheaper than taking
two square roots.
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