[Mesa-dev] [Bug 94909] [llvmpipe] piglit fs-roundEven-float regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94909

            Bug ID: 94909
           Summary: [llvmpipe] piglit fs-roundEven-float regression
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: vlee at freedesktop.org
        QA Contact: mesa-dev at lists.freedesktop.org
                CC: jfonseca at vmware.com, sroland at vmware.com

mesa: 35ade36c88e5aaa0b18c3cc911d9a4de3a60a80b (master 11.3.0-devel)

$ ./bin/shader_runner
generated_tests/spec/glsl-1.30/execution/built-in-functions/fs-roundEven-float.shader_test
-auto
Probe color at (36,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 1.000000 0.000000 0.000000 1.000000
Probe color at (60,0)
  Expected: 0.000000 1.000000 0.000000 1.000000
  Observed: 1.000000 0.000000 0.000000 1.000000
PIGLIT: {"result": "fail" }


e4f01da15d8c6ce3e8c77ff3ff3d2ce2574a3f7b is the first bad commit
commit e4f01da15d8c6ce3e8c77ff3ff3d2ce2574a3f7b
Author: Jose Fonseca <jfonseca at vmware.com>
Date:   Fri Apr 1 11:50:28 2016 +0100

    gallivm: Prefer backend agnostic intrinsic for rounding.

    We could unconditionally use these instrinsics, but performance with SSE2
    would suck, as LLVM falls back to calling libm.

    lp_test_arit.

    Reviewed-by: Roland Scheidegger <sroland at vmware.com>

:040000 040000 0f7b55e9ae1e5faa3e9ee24d5ab66605e5be096d
09bf79b798b6210887add905b1f91d8587b58bc2 M    src
bisect run success

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