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[Bug math/14914] New: ldbl-128ibm powl inaccuracy


http://sourceware.org/bugzilla/show_bug.cgi?id=14914

             Bug #: 14914
           Summary: ldbl-128ibm powl inaccuracy
           Product: glibc
           Version: 2.16
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
        AssignedTo: unassigned@sourceware.org
        ReportedBy: jsm28@gcc.gnu.org
    Classification: Unclassified
              Host: powerpc*-*


Various powl tests fail for ldbl-128ibm with errors of up to 168ulp:

Failure: Test: pow (0x1.0000000000001p0, -0x1.23456789abcdfp61) ==
1.0118762747828234466621210689458255908670e-253
Result:
 is:          1.01187627478282344666e-253   0x1.7bd57afffb8670bdc80bp-841
 should be:   1.01187627478282344666e-253   0x1.7bd57afffb8670bdc80bp-841
 difference:  2.82339593858271666738e-283   0x1.4fe00000000000000000p-939
 ulp       :  167.9375
 max.ulp   :  0.0000
Maximal error of `pow'
 is      : 168 ulp
 accepted: 1 ulp

I have a patch.

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