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* [Bug math/15418] New: PowerPC: spurious overflow for hypot @ 2013-04-30 14:19 azanella at linux dot vnet.ibm.com 2013-04-30 14:20 ` [Bug math/15418] " azanella at linux dot vnet.ibm.com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: azanella at linux dot vnet.ibm.com @ 2013-04-30 14:19 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15418 Bug #: 15418 Summary: PowerPC: spurious overflow for hypot Product: glibc Version: 2.18 Status: NEW Severity: normal Priority: P2 Component: math AssignedTo: unassigned@sourceware.org ReportedBy: azanella@linux.vnet.ibm.com Classification: Unclassified The hypot implementation for PowerPC (sysdeps/powerpc/fpu/e_hypot.c) generates spurious overflow exception for subnormal arguments. This is due it checks if arg1/arg2 > 2^60 (arg1 > arg2) by using a FP division. A possible fix would be to instead of check: if (arg1/arg2 > 2^60) return x+y To check: if (arg2 > (LDBL_MAX/2^60)) if (x/y > 2^60) return x+y else if (x > (y*2^60) return x+y The FP division will be use only for large inputs. I will send a patch to libc-alpha with a fix. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/15418] PowerPC: spurious overflow for hypot 2013-04-30 14:19 [Bug math/15418] New: PowerPC: spurious overflow for hypot azanella at linux dot vnet.ibm.com @ 2013-04-30 14:20 ` azanella at linux dot vnet.ibm.com 2013-05-07 14:15 ` azanella at linux dot vnet.ibm.com 2014-06-13 18:10 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: azanella at linux dot vnet.ibm.com @ 2013-04-30 14:20 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15418 Adhemerval Zanella Netto <azanella at linux dot vnet.ibm.com> changed: What |Removed |Added ---------------------------------------------------------------------------- AssignedTo|unassigned at sourceware |azanella at linux dot |dot org |vnet.ibm.com -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/15418] PowerPC: spurious overflow for hypot 2013-04-30 14:19 [Bug math/15418] New: PowerPC: spurious overflow for hypot azanella at linux dot vnet.ibm.com 2013-04-30 14:20 ` [Bug math/15418] " azanella at linux dot vnet.ibm.com @ 2013-05-07 14:15 ` azanella at linux dot vnet.ibm.com 2014-06-13 18:10 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: azanella at linux dot vnet.ibm.com @ 2013-05-07 14:15 UTC (permalink / raw) To: glibc-bugs http://sourceware.org/bugzilla/show_bug.cgi?id=15418 Adhemerval Zanella Netto <azanella at linux dot vnet.ibm.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #1 from Adhemerval Zanella Netto <azanella at linux dot vnet.ibm.com> 2013-05-07 14:15:35 UTC --- Fixed by commit 16e616a72f9ac247520c0c7da99b99e229facdf9. -- Configure bugmail: http://sourceware.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug math/15418] PowerPC: spurious overflow for hypot 2013-04-30 14:19 [Bug math/15418] New: PowerPC: spurious overflow for hypot azanella at linux dot vnet.ibm.com 2013-04-30 14:20 ` [Bug math/15418] " azanella at linux dot vnet.ibm.com 2013-05-07 14:15 ` azanella at linux dot vnet.ibm.com @ 2014-06-13 18:10 ` fweimer at redhat dot com 2 siblings, 0 replies; 4+ messages in thread From: fweimer at redhat dot com @ 2014-06-13 18:10 UTC (permalink / raw) To: glibc-bugs https://sourceware.org/bugzilla/show_bug.cgi?id=15418 Florian Weimer <fweimer at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Flags| |security- -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-06-13 18:10 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-04-30 14:19 [Bug math/15418] New: PowerPC: spurious overflow for hypot azanella at linux dot vnet.ibm.com 2013-04-30 14:20 ` [Bug math/15418] " azanella at linux dot vnet.ibm.com 2013-05-07 14:15 ` azanella at linux dot vnet.ibm.com 2014-06-13 18:10 ` fweimer at redhat dot com
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