[Bug math/19168] New: math/test-ildoubl and math/test-ldouble failure

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19168

            Bug ID: 19168
           Summary: math/test-ildoubl and math/test-ldouble failure
           Product: glibc
           Version: 2.23
            Status: NEW
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
  Target Milestone: ---
             Flags: security-

Created attachment 8738
  --> https://sourceware.org/bugzilla/attachment.cgi?id=8738&action=edit
ulps.diff

On a machine with Opteron 6272 CPUs, I see these failures building upstream
glibc :

==> math/test-ildoubl.out <==
testing long double (inline functions)
Failure: Test: gamma_upward (-0x2.f00004p+4)
Result:
 is:         -1.24326088114809082584e+02  -0xf.8a6f5057970487b0p+3
 should be:  -1.24326088114809082542e+02  -0xf.8a6f505797048750p+3
 difference:  4.16333634234433702659e-17   0xc.0000000000000000p-58
 ulp       :  6.0000
 max.ulp   :  5.0000
Maximal error of `gamma_upward'
 is      : 6 ulp
 accepted: 5 ulp
Failure: Test: lgamma_upward (-0x2.f00004p+4)
Result:
 is:         -1.24326088114809082584e+02  -0xf.8a6f5057970487b0p+3
 should be:  -1.24326088114809082542e+02  -0xf.8a6f505797048750p+3
 difference:  4.16333634234433702659e-17   0xc.0000000000000000p-58
 ulp       :  6.0000
 max.ulp   :  5.0000
Maximal error of `lgamma_upward'
 is      : 6 ulp
 accepted: 5 ulp
Failure: Test: Real part of: clog10_upward (-0x4.74556ec92eb48p-4 +
0x1.1e7aa1d936f6fp+0 i)
Result:
 is:          6.18931597824831541829e-02   0xf.d83ae91ca35b3d30p-8
 should be:   6.18931597824831541558e-02   0xf.d83ae91ca35b3cb0p-8
 difference:  2.71050543121376108502e-20   0x8.0000000000000000p-68
 ulp       :  8.0000
 max.ulp   :  7.0000
Maximal error of real part of: clog10_upward
 is      : 8 ulp
 accepted: 7 ulp
Maximal error of imaginary part of: clog10_upward
 is      : 2 ulp
 accepted: 3 ulp

Test suite completed:
  115106 test cases plus 105358 tests for exception flags and
    105358 tests for errno executed.
  6 errors occurred.

==> math/test-ldouble.out <==
testing long double (without inline functions)
Failure: Test: gamma_upward (-0x2.f00004p+4)
Result:
 is:         -1.24326088114809082584e+02  -0xf.8a6f5057970487b0p+3
 should be:  -1.24326088114809082542e+02  -0xf.8a6f505797048750p+3
 difference:  4.16333634234433702659e-17   0xc.0000000000000000p-58
 ulp       :  6.0000
 max.ulp   :  5.0000
Maximal error of `gamma_upward'
 is      : 6 ulp
 accepted: 5 ulp
Failure: Test: lgamma_upward (-0x2.f00004p+4)
Result:
 is:         -1.24326088114809082584e+02  -0xf.8a6f5057970487b0p+3
 should be:  -1.24326088114809082542e+02  -0xf.8a6f505797048750p+3
 difference:  4.16333634234433702659e-17   0xc.0000000000000000p-58
 ulp       :  6.0000
 max.ulp   :  5.0000
Maximal error of `lgamma_upward'
 is      : 6 ulp
 accepted: 5 ulp
Failure: Test: Real part of: clog10_upward (-0x4.74556ec92eb48p-4 +
0x1.1e7aa1d936f6fp+0 i)
Result:
 is:          6.18931597824831541829e-02   0xf.d83ae91ca35b3d30p-8
 should be:   6.18931597824831541558e-02   0xf.d83ae91ca35b3cb0p-8
 difference:  2.71050543121376108502e-20   0x8.0000000000000000p-68
 ulp       :  8.0000
 max.ulp   :  7.0000
Maximal error of real part of: clog10_upward
 is      : 8 ulp
 accepted: 7 ulp
Maximal error of imaginary part of: clog10_upward
 is      : 2 ulp
 accepted: 3 ulp

Test suite completed:
  116014 test cases plus 106266 tests for exception flags and
    106266 tests for errno executed.
  6 errors occurred.

Upstream glibc version is:

commit 45ccb8346bba9b0f7a72a92d7f8b1c796dd496ba
Author: Chris Metcalf <cmetcalf@ezchip.com>
Date:   Thu Oct 22 13:36:53 2015 -0400

I'm attaching the âmake regen-ulpsâ diff.

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