[Bug 92595] [HSW,BDW,SKL][GLES 3.1 CTS] Big difference in the results for the ES31-CTS.shader_bitfield_operation.* tests

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92595

            Bug ID: 92595
           Summary: [HSW,BDW,SKL][GLES 3.1 CTS] Big difference in the
                    results for the ES31-CTS.shader_bitfield_operation.*
                    tests
           Product: Mesa
           Version: 11.0
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: marta.lofstedt at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 119066
  --> https://bugs.freedesktop.org/attachment.cgi?id=119066&action=edit
bitfield failing

Software versions:
    4.2.0-1-generic
    OpenGL version string: 3.0 Mesa 11.1.0-devel (git-13a5805)

GPU hardware:
    OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop 
    00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200
v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06)

CPU hardware:
    x86_64
    Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
---------------
Software versions:
    4.3.0-rc3+
    OpenGL version string: 3.0 Mesa 11.1.0-devel (git-13a5805)

GPU hardware:
    OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 5300 (Broadwell GT2)
    00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U
Integrated Graphics [8086:161e] (rev 06)

CPU hardware:
    x86_64
    Genuine Intel(R) CPU 0000 @ 0.60GHz
----------------
Software versions:
    4.3.0-rc5-mainline+
    OpenGL version string: 3.0 Mesa 11.1.0-devel (git-13a5805)

GPU hardware:
    OpenGL renderer string: Mesa DRI Intel(R) Skylake ULX GT2
    00:02.0 VGA compatible controller [0300]: Intel Corporation Sky Lake
Integrated Graphics [8086:191e] (rev 07)

CPU hardware:
    x86_64
    Intel(R) Core(TM) m7-6Y75 CPU @ 1.20GHz
-----------------
CTS version:
git at 67ae88f31295

command: 
./glcts --deqp-case=ES31-CTS.shader_bitfield_operation*

Environment:
Mesa built with: --enable-debug
export MESA_GLES_VERSION_OVERRIDE=3.1
export MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader
------------------
The shader bitfield test of the OpenGL ES 3.1 CTS, run builtin GLSL functions
on various types set up in std430 layout. For example the: 
ES31-CTS.shader_bitfield_operation.frexp.vec4_0, the will run frexp(vec4,
vec4), then dispatch compute, mapbufferrange out the result and compare with an
expected result.
Unfortunately there is a big gap between the numbers of passing test for
different HW.I attach a list of failing test for HSW, BDW and SKL.

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