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Bug 1623537 - glibc: Test suite failure: math/test-ildouble-fma, math/test-ldouble-fma on ppc64le
Summary: glibc: Test suite failure: math/test-ildouble-fma, math/test-ldouble-fma on p...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: glibc
Version: 8.0
Hardware: ppc64le
OS: Linux
high
medium
Target Milestone: beta
: 8.1
Assignee: Florian Weimer
QA Contact: qe-baseos-tools-bugs
URL:
Whiteboard:
Depends On: 1623533 1682593
Blocks: 1684553
TreeView+ depends on / blocked
 
Reported: 2018-08-29 14:53 UTC by Florian Weimer
Modified: 2023-07-18 14:30 UTC (History)
9 users (show)

Fixed In Version: glibc-2.28-44.el8
Doc Type: No Doc Update
Doc Text:
undefined
Clone Of: 1623533
Environment:
Last Closed: 2019-11-05 21:28:31 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3513 0 None None None 2019-11-05 21:28:55 UTC
Sourceware 23584 0 None None None 2019-07-29 07:50:04 UTC

Description Florian Weimer 2018-08-29 14:53:12 UTC 
+++ This bug was initially created as a clone of Bug #1623533 +++

The full test outputs are:

=====FAIL: math/test-ildouble-fma.out=====
testing long double (inline functions)
Failure: Test: fma_downward (inf, inf, -max_value)
Result:
 is:         qNaN
 should be:   inf   inf
Failure: Test: fma_downward (-inf, -inf, -max_value)
Result:
 is:         qNaN
 should be:   inf   inf
Failure: Test: fma_upward (inf, -inf, max_value)
Result:
 is:         qNaN
 should be:  -inf  -inf
Failure: Test: fma_upward (-inf, inf, max_value)
Result:
 is:         qNaN
 should be:  -inf  -inf
Test suite completed:
  1458 test cases plus 0 tests for exception flags and
    0 tests for errno executed.
  4 errors occurred.

=====FAIL: math/test-ldouble-fma.out=====
testing long double (without inline functions)
Failure: fma_downward (inf, inf, -max_value): Exception "Invalid operation" set
Failure: fma_downward (inf, inf, -max_value): Exception "Overflow" set
Failure: Test: fma_downward (inf, inf, -max_value)
Result:
 is:         qNaN
 should be:   inf   inf
Failure: fma_downward (inf, -inf, -max_value): Exception "Overflow" set
Failure: fma_downward (-inf, inf, -max_value): Exception "Overflow" set
Failure: fma_downward (-inf, -inf, -max_value): Exception "Invalid operation" set
Failure: fma_downward (-inf, -inf, -max_value): Exception "Overflow" set
Failure: Test: fma_downward (-inf, -inf, -max_value)
Result:
 is:         qNaN
 should be:   inf   inf
Failure: fma_upward (inf, inf, max_value): Exception "Overflow" set
Failure: fma_upward (inf, -inf, max_value): Exception "Invalid operation" set
Failure: fma_upward (inf, -inf, max_value): Exception "Overflow" set
Failure: Test: fma_upward (inf, -inf, max_value)
Result:
 is:         qNaN
 should be:  -inf  -inf
Failure: fma_upward (-inf, inf, max_value): Exception "Invalid operation" set
Failure: fma_upward (-inf, inf, max_value): Exception "Overflow" set
Failure: Test: fma_upward (-inf, inf, max_value)
Result:
 is:         qNaN
 should be:  -inf  -inf
Failure: fma_upward (-inf, -inf, max_value): Exception "Overflow" set
Test suite completed:
  1458 test cases plus 1454 tests for exception flags and
    1454 tests for errno executed.
  16 errors occurred.

Also seen on rawhide.
Comment 1 Florian Weimer 2018-09-21 17:31:23 UTC 
Latest upstream update is here:

https://sourceware.org/ml/libc-alpha/2018-09/msg00409.html

There is still no patch.
Comment 2 Florian Weimer 2019-01-16 14:57:33 UTC 
Upstream has XFAILed these tests in this commit:

commit ecdacd34a2ac3b6d5a529ff218b29261d9d98a7a
Author: Tulio Magno Quites Machado Filho <tuliom.com>
Date:   Mon Jan 14 17:54:44 2019 -0200

    Add XFAIL_ROUNDING_IBM128_LIBGCC to more fma() tests
    
    Ignore 112 errors in math/test-ldouble-fma and math/test-ildouble-fma
    when IBM 128-bit long double used.
    These errors are caused by spurious overflows from libgcc.
    
            * math/libm-test-fma.inc (fma_test_data): Set
            XFAIL_ROUNDING_IBM128_LIBGCC to more tests.
Comment 3 Tulio Magno Quites Machado Filho 2019-01-16 18:04:38 UTC 
A reduced version of the 2.29 patch was backported to glibc 2.28 as commit:

commit b297581acb66f80b513996c1580158b0fb12d469
Author: Tulio Magno Quites Machado Filho <tuliom.com>
Date:   Mon Jan 14 17:54:44 2019 -0200

    Add XFAIL_ROUNDING_IBM128_LIBGCC to more fma() tests
    
    Ignore 16 errors in math/test-ldouble-fma and 4 errors in
    math/test-ildouble-fma when IBM 128-bit long double used.
    These errors are caused by spurious overflows from libgcc.
    
            * math/libm-test-fma.inc (fma_test_data): Set
            XFAIL_ROUNDING_IBM128_LIBGCC to more tests.
    
    Signed-off-by: Tulio Magno Quites Machado Filho <tuliom.com>
    (cherry picked from commit ecdacd34a2ac3b6d5a529ff218b29261d9d98a7a)
Comment 6 Sergey Kolosov 2019-04-30 12:39:47 UTC 
Verified,

math/test-ildouble-fma, math/test-ldouble-fma tests pass in glibc-2.28-44.el8
Comment 8 errata-xmlrpc 2019-11-05 21:28:31 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3513
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