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* [Bug math/15419] New: PowerPC: spurious overflow for hypotf
@ 2013-04-30 14:25 azanella at linux dot vnet.ibm.com
2013-05-07 14:16 ` [Bug math/15419] " azanella at linux dot vnet.ibm.com
2014-06-13 18:09 ` fweimer at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: azanella at linux dot vnet.ibm.com @ 2013-04-30 14:25 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15419
Bug #: 15419
Summary: PowerPC: spurious overflow for hypotf
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 hypotf implementation for PowerPC (sysdeps/powerpc/fpu/e_hypotf.c)
generates
spurious overflow exception for subnormal arguments. This is due it checks
if arg1/arg2 > 2^30 (arg1 > arg2) by using a FP division.
Since the double version of ieee sqrt function will be used to compute final
value, there is not need to argument reduction in such case. A possible fix
would be just to clean up the test and call ieee sqrt directly.
I will send a patch to libc-alpha with a fix.
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* [Bug math/15419] PowerPC: spurious overflow for hypotf
2013-04-30 14:25 [Bug math/15419] New: PowerPC: spurious overflow for hypotf azanella at linux dot vnet.ibm.com
@ 2013-05-07 14:16 ` azanella at linux dot vnet.ibm.com
2014-06-13 18:09 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: azanella at linux dot vnet.ibm.com @ 2013-05-07 14:16 UTC (permalink / raw)
To: glibc-bugs
http://sourceware.org/bugzilla/show_bug.cgi?id=15419
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 14:16:06 UTC ---
Fixed by commit 16e616a72f9ac247520c0c7da99b99e229facdf9.
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* [Bug math/15419] PowerPC: spurious overflow for hypotf
2013-04-30 14:25 [Bug math/15419] New: PowerPC: spurious overflow for hypotf azanella at linux dot vnet.ibm.com
2013-05-07 14:16 ` [Bug math/15419] " azanella at linux dot vnet.ibm.com
@ 2014-06-13 18:09 ` fweimer at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fweimer at redhat dot com @ 2014-06-13 18:09 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=15419
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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2013-04-30 14:25 [Bug math/15419] New: PowerPC: spurious overflow for hypotf azanella at linux dot vnet.ibm.com
2013-05-07 14:16 ` [Bug math/15419] " azanella at linux dot vnet.ibm.com
2014-06-13 18:09 ` fweimer at redhat dot com
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