Plan 9 from Bell Labs’s /n/sources/patch/applied/5c-nan-cmp/readme

Copyright © 2009 Alcatel-Lucent.
Distributed under the Lucent Public License version 1.02.
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Ensure floating point comparisons with NaN are unordered (always return FALSE except for !=).
On ARM this is just a matter of using the right condition codes (cc in PSR has different
meaning when set from the FPSCR after a floating point comparison).

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