[Bug testsuite/39769] New: vmx tests fail due to reliance on floating point equality

[Bug testsuite/39769] New: vmx tests fail due to reliance on floating point equality

[meissner at linux dot vnet dot ibm dot com]

3 of the vmx tests (3a-04.c, 3a-04m.c, and 3a-05.c) fail on different powerpc
machines because the test relies on the Vector 2 Raised to the Exponent
Estimate and Vector Reciprocal Estimate instructions producing the exact same
bit value for each machine.  Since these instructions are estitmate functions,
different implementations of the powerpc architecture produce different
results.  Floating point equality should never have been used for these tests.

I have patches to change the test to see whether the value produces is accurate
to 4 decimal digits using greater than and less than tests, which I will attach
shortly.


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           Summary: vmx tests fail due to reliance on floating point
                    equality
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: meissner at linux dot vnet dot ibm dot com
 GCC build triplet: powerpc64-unknown-linux-gnu
  GCC host triplet: powerpc64-unknown-linux-gnu
GCC target triplet: powerpc64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769

[Bug testsuite/39769] vmx tests fail due to reliance on floating point equality

[meissner at linux dot vnet dot ibm dot com]

------- Comment #1 from meissner at linux dot vnet dot ibm dot com  2009-04-14 17:48 -------
Created an attachment (id=17637)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17637&action=view)
Patch to fix the tests not to use floating point equality.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769

[Bug testsuite/39769] vmx tests fail due to reliance on floating point equality

[meissner at gcc dot gnu dot org]

------- Comment #2 from meissner at gcc dot gnu dot org  2009-04-14 22:56 -------
Subject: Bug 39769

Author: meissner
Date: Tue Apr 14 22:55:52 2009
New Revision: 146068

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146068
Log:
PR testsuite/39769

Modified:
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/vmx/3a-04.c
    trunk/gcc/testsuite/gcc.dg/vmx/3a-04m.c
    trunk/gcc/testsuite/gcc.dg/vmx/3a-05.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769

[Bug testsuite/39769] vmx tests fail due to reliance on floating point equality

[meissner at gcc dot gnu dot org]

------- Comment #3 from meissner at gcc dot gnu dot org  2009-04-14 22:57 -------
Subject: Bug 39769

Author: meissner
Date: Tue Apr 14 22:56:52 2009
New Revision: 146070

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146070
Log:
PR testsuite/39769

Modified:
    branches/ibm/power7-meissner/gcc/testsuite/ChangeLog.power7
    branches/ibm/power7-meissner/gcc/testsuite/gcc.dg/vmx/3a-04.c
    branches/ibm/power7-meissner/gcc/testsuite/gcc.dg/vmx/3a-04m.c
    branches/ibm/power7-meissner/gcc/testsuite/gcc.dg/vmx/3a-05.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769

[Bug testsuite/39769] vmx tests fail due to reliance on floating point equality

[meissner at gcc dot gnu dot org]

------- Comment #4 from meissner at gcc dot gnu dot org  2009-04-14 22:58 -------
Subject: Bug 39769

Author: meissner
Date: Tue Apr 14 22:57:51 2009
New Revision: 146071

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146071
Log:
PR testsuite/39769

Modified:
    branches/ibm/gcc-4_3-branch/gcc/testsuite/ChangeLog
    branches/ibm/gcc-4_3-branch/gcc/testsuite/gcc.dg/vmx/3a-04.c
    branches/ibm/gcc-4_3-branch/gcc/testsuite/gcc.dg/vmx/3a-04m.c
    branches/ibm/gcc-4_3-branch/gcc/testsuite/gcc.dg/vmx/3a-05.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769

[Bug testsuite/39769] vmx tests fail due to reliance on floating point equality

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2009-04-16 18:14 -------
Fixed.


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pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39769