Bug 82643 - [BDW Bisected]Piglit spec_ARB_clear_texture_arb_clear_texture-multisample fails
Summary: [BDW Bisected]Piglit spec_ARB_clear_texture_arb_clear_texture-multisample fails
Status: VERIFIED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: high normal
Assignee: Kenneth Graunke
QA Contact: Intel 3D Bugs Mailing List
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-08-15 03:03 UTC by lu hua
Modified: 2014-08-18 05:57 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:


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Description lu hua 2014-08-15 03:03:51 UTC
System Environment:
--------------------------
Platform: BDW
Libdrm:		(master)libdrm-2.4.56-4-g07fead4462b2d537d0c3cae69a09272fc426c598
Mesa:		(master)c66d928f2c9fa59e162c391fbdd37df969959718
Xserver:	(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel:(master)2.99.914-47-gd974dabc8ac06e76bffe5824caf86fd072c35ed3
Libva:		(master)3fddb7f937df4e0e15391bd65ae3c7552ea5b3d7
Libva_intel_driver:(master)82d2ed8d7da3619c0ea467c06604f5626fc0b901
Kernel:   (drm-intel-nightly)da31e7c60be217316278a055dd3f91c33913270f

Bug detailed description:
---------------------------
It fails on BDW with mesa master branch, works well on 10.2 branch.
Bisect shows:c66d928f2c9fa59e162c391fbdd37df969959718 is the first bad commit
commit c66d928f2c9fa59e162c391fbdd37df969959718
Author:     Kenneth Graunke <kenneth@whitecape.org>
AuthorDate: Thu Jul 17 14:33:15 2014 -0700
Commit:     Kenneth Graunke <kenneth@whitecape.org>
CommitDate: Wed Aug 13 21:19:07 2014 -0700

    i965: Enable INTDIV in SIMD16 mode.

    All we need to do is decompose this to two SIMD8 instructions, like we
    do in many other cases.  We even already have code for that.

    I apparently just botched this last time I tried, and it was easy.

    Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
    Reviewed-by: Matt Turner <mattst88@gmail.com>

output:
Probe color at (8,8)
  Expected: 0.000000 1.000000 0.000000
  Observed: 1.000000 0.000000 0.000000
Probe color at (10,2)
  Expected: 0.000000 0.000000 0.000000
  Observed: 1.000000 0.000000 0.000000
PIGLIT: {"result": "fail" }


Reproduce steps:
-------------------------
1. xinit
2. bin/arb_clear_texture-multisample -fbo -auto
Comment 1 Kenneth Graunke 2014-08-15 03:45:11 UTC
Oh, thanks for catching this!

Patch on the mailing list:
https://bugs.freedesktop.org/show_bug.cgi?id=82643
Comment 2 Kenneth Graunke 2014-08-15 06:22:47 UTC
Pushed a bit early.
Comment 3 lu hua 2014-08-18 05:57:32 UTC
Verified.Fixed.


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