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[Bug dynamic-link/21236] NaN generation by optimized math functions
- From: "charles at schwieters dot org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 09 Mar 2017 11:39:49 +0000
- Subject: [Bug dynamic-link/21236] NaN generation by optimized math functions
- Auto-submitted: auto-generated
- References: <bug-21236-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=21236
--- Comment #2 from Charles Schwieters <charles at schwieters dot org> ---
I have reproduced the behavior with the upstream master, including fixing
things by reverting that single commit. Thanks to the good documentation you
pointed me to, I was able to run this on more platforms, including a Xeon Phi
7230. Here is a summary of the results:
platform NaN occurs
Xeon Phi 7230 no
Xeon CPU E5-2670 yes
Xeon E5-1650 v2 yes
Pentium 4405 no
AMD Opteron 2218 no
My binary is available for this sort of analysis, but Intel may be the correct
place to turn.
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