Nouveau - Mar 2015 - [Bug 89758] New: pow WebGL Conformance test with mesa drivers

https://bugs.freedesktop.org/show_bug.cgi?id=89758

            Bug ID: 89758
           Summary: pow WebGL Conformance test with mesa drivers
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: lukebenes at hotmail.com
        QA Contact: nouveau at lists.freedesktop.org

On a GTX 650, the following 6 pow tests fail with the nouveau drivers but pass
with the nvidia proprietary driver:

https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/conformance/ogles/GL/pow/pow_009_to_016.html

test: pow_float_frag_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,0,0,255] expected [16,0,0,255]

test: pow_vec2_frag_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,0,255] expected [16,255,0,255]

test: pow_vec3_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,90,255] expected [16,255,255,255]

https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/conformance/ogles/GL/pow/pow_017_to_024.html

test: pow_float_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,0,0,255] expected [16,0,0,255]

test: pow_vec2_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,0,255] expected [16,255,0,255]

test: pow_vec3_vert_xconsthalf_yvary.test.html
FAIL pixel @ (33, 33 was [45,90,90,255] expected [16,255,255,255]

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https://bugs.freedesktop.org/show_bug.cgi?id=89758

--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Confirmed on a GF108. Need to piglit this so that we can look at what's
going
on without running a web browser...

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--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Thanks for the report. As I suspected, nothing actually to do with pow, just
that the test, as written, happens to tickle a nouveau optimization bug. Should
be fixed by:

http://patchwork.freedesktop.org/patch/45657/

Still need to run it through piglit.

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Fix pushed in 49b86007aa. Thanks for reporting!

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