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* [Bug math/2564] Incorrect return from double jn (16381, -0X1.2947602EE574P+17)
[not found] <bug-2564-131@http.sourceware.org/bugzilla/>
@ 2012-02-25 3:04 ` jsm28 at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-02-25 3:04 UTC (permalink / raw)
To: glibc-bugs
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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* [Bug math/2564] New: Incorrect return from double jn (16381, -0X1.2947602EE574P+17)
@ 2006-04-12 22:47 hjl at lucon dot org
2006-04-23 17:55 ` [Bug math/2564] " drepper at redhat dot com
0 siblings, 1 reply; 2+ messages in thread
From: hjl at lucon dot org @ 2006-04-12 22:47 UTC (permalink / raw)
To: glibc-bugs
Failure: Test: jn (16381, -0X1.2947602EE574P+17) == 0X1.82C6C5A295941P+903
Result:
is: 2.04613189330115621475e-03 0x1.0c30cb214bbf30000000p-9
should be: 1.02165942491467882820e+272 0x1.82c6c5a2959410000000p+903
difference: 1.02165942491467882820e+272 0x1.82c6c5a2959410000000p+903
ulp : 6804243321805121.0000
max.ulp : 0.0000
--
Summary: Incorrect return from double jn (16381, -
0X1.2947602EE574P+17)
Product: glibc
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: math
AssignedTo: aj at suse dot de
ReportedBy: hjl at lucon dot org
CC: glibc-bugs at sources dot redhat dot com
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://sourceware.org/bugzilla/show_bug.cgi?id=2564
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2012-02-25 3:04 ` [Bug math/2564] Incorrect return from double jn (16381, -0X1.2947602EE574P+17) jsm28 at gcc dot gnu.org
2006-04-12 22:47 [Bug math/2564] New: " hjl at lucon dot org
2006-04-23 17:55 ` [Bug math/2564] " drepper at redhat dot com
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