[Bug math/15419] New: PowerPC: spurious overflow for hypotf

["azanella at linux dot vnet.ibm.com" <sourceware-bugzilla at sourceware dot org>]

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.

-- 
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.