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[Bug math/2564] Incorrect return from double jn (16381, -0X1.2947602EE574P+17)
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Sat, 25 Feb 2012 03:04:25 +0000
- Subject: [Bug math/2564] Incorrect return from double jn (16381, -0X1.2947602EE574P+17)
- Auto-submitted: auto-generated
- References: <bug-2564-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=2564
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> 2012-02-25 03:04:25 UTC ---
I don't know where you got your expected result of 0X1.82C6C5A295941P+903 from.
MPFR says the correctly rounded result is 0X1.0C30CB214BBF4P-9, i.e. glibc's
result is only 1ulp below the correctly rounded value. Wolfram Alpha appears
to agree, though I only eyeballed the decimal value given. Since there are
already ulps files checked in with bigger expected errors for jn with smaller
arguments, I don't think there's any point adding this 1ulp error as a new
testcase or keeping this bug open for that 1ulp error.
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