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* [Bug math/2154] accuracy of cacoshl is bad.
[not found] <bug-2154-131@http.sourceware.org/bugzilla/>
@ 2012-02-22 22:22 ` jsm28 at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: jsm28 at gcc dot gnu.org @ 2012-02-22 22:22 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=2154
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> 2012-02-22 22:22:26 UTC ---
The tests given in this bug take the double constants 0.3 and 0.4 and convert
them to long double. The results of cacoshl appear to be within a few ULPs of
what is expected for those particular long double values, whereas the
expectations given in this testcase are the results for infinite-precision
constants 0.3 and 0.4 (as opposed to those for values rounded to 53 bits then
extended to 64 bits, or rounded directly to 64 bits) - and when your inputs
differ by 11 bits from what they were intended to be, 770 ULPs is hardly an
unexpected error. So this is not a correct test and there is no sign of undue
inaccuracy here (I don't think it's yet expected for complex functions to be
last-bit-accurate correctly rounded).
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* [Bug math/2154] accuracy of cacoshl is bad.
2006-01-15 18:02 [Bug math/2154] New: " aj at suse dot de
@ 2006-04-25 18:43 ` drepper at redhat dot com
0 siblings, 0 replies; 2+ messages in thread
From: drepper at redhat dot com @ 2006-04-25 18:43 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From drepper at redhat dot com 2006-04-25 18:43 -------
Suspended until somebody comes up with a patch.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |SUSPENDED
http://sourceware.org/bugzilla/show_bug.cgi?id=2154
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[not found] <bug-2154-131@http.sourceware.org/bugzilla/>
2012-02-22 22:22 ` [Bug math/2154] accuracy of cacoshl is bad jsm28 at gcc dot gnu.org
2006-01-15 18:02 [Bug math/2154] New: " aj at suse dot de
2006-04-25 18:43 ` [Bug math/2154] " drepper at redhat dot com
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