[Bug 84223] New: [BSW]Piglit spec_arb_shading_language_packing_execution_built-in-functions_vs-packHalf2x16 fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84223

          Priority: medium
            Bug ID: 84223
          Assignee: idr at freedesktop.org
           Summary: [BSW]Piglit
                    spec_arb_shading_language_packing_execution_built-in-f
                    unctions_vs-packHalf2x16 fails
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform: BSW
Libdrm:       
(master)libdrm-2.4.56-29-g666788a6062de62aa0b3560760fbb0903167a319
Mesa:        (master)d69faf851fff5d41086c9940b2fcf2aa72c40e60
Xserver:(master)xorg-server-1.16.0-317-geaee6572beefca240c42791f9a3a6e547bedd410 
Xf86_video_intel:(master)2.99.916-52-g376037e6336dfc3b32c51b774ab8a80f64390e02
Libva:        (master)e0d25ece01e7aba819c910e98c4fb4706cdab055
Libva_intel_driver:(master)bc2e06ef0f89b264fe968fbff4f06e425385c3d8
Kernel:   (drm-intel-nightly)c5660b4ad395f1e34eacc22cf81c687edfc9c83c

Bug detailed description:
---------------------------
It fails on BSW with mesa master branch, works well on BDW.
spec_arb_shading_language_packing_execution_built-in-functions_vs-unpackHalf2x16
also fails.

output:
Probe color at (3,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 0.011765 0.988235 0.000000 1.000000
PIGLIT: {"result": "fail" }

Reproduce steps:
-------------------------
1. xinit
2. bin/shader_runner
generated_tests/spec/arb_shading_language_packing/execution/built-in-functions/vs-packHalf2x16.shader_test
-auto

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