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[Bug math/2574] Incorrect return from float log10 (0X1.118C6318C6319P+0)
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Sun, 26 Feb 2012 17:26:48 +0000
- Subject: [Bug math/2574] Incorrect return from float log10 (0X1.118C6318C6319P+0)
- Auto-submitted: auto-generated
- References: <bug-2574-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=2574
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|SUSPENDED |RESOLVED
Resolution| |INVALID
--- Comment #2 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-02-26 17:26:48 UTC ---
When the argument is rounded to float (0X1.118C64P+0), the correctly rounded
result becomes 0X1.D7C3B0P-6, so the error is 1ulp not 12ulp, and since there's
already a test of log10f in the testsuite with a 2ulp error recorded in
libm-test-ulps for x86_64, I don't think it's useful to add this test as well
or keep a bug open for this 1ulp error.
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