[Bug 52957] New: [r200] piglit glean/vp1-LIT test 2 (degenerate case: 0 ^ 0 -> 1) test fails

[Bug 52957] New: [r200] piglit glean/vp1-LIT test 2 (degenerate case: 0 ^ 0 -> 1) test fails

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=52957

             Bug #: 52957
           Summary: [r200] piglit glean/vp1-LIT test 2 (degenerate case: 0
                    ^ 0 -> 1) test fails
    Classification: Unclassified
           Product: Mesa
           Version: 8.0
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/r200
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: mister.freeman@laposte.net


System configuration :

- radeon 9000 AGP ( M9, rv250 )
- laptop pentium 4 2.4 Ghz 1.25 Gb ram
- archlinux 32 bits

Step to reproduce the bug

- mesa 8.0.4 release ( but the bug occurs also with the git version )
- a graphic card who uses the r200 driver 
- install piglit ( git version )
- run the glean test "vp1-LIT test 2 (degenerate case: 0 ^ 0 -> 1)" in piglit :

./piglit-run.py  -t "glean/vp1-LIT test 2 (degenerate case" tests/quick.tests
results/quick

the glean/vp1-LIT test 2 (degenerate case: 0 ^ 0 -> 1) will fail with this
error message :

Vertex Program test 1: test a specific set of vertex programs.

FAILURE:
  Program: LIT test 2 (degenerate case: 0 ^ 0 -> 1)
  Expected color: 1, 0.65, 1, 1
  Observed color: 1, 0.65098, 0, 1
vertProg1:  FAIL rgba8, db, z24, s8, win+pmap, id 33
    3 tests passed, 1 tests failed.

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[Bug 52957] [r200] piglit glean/vp1-LIT test 2 (degenerate case: 0 ^ 0 -> 1) test fails

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=52957

Roland Scheidegger <sroland@vmware.com> changed:

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

--- Comment #1 from Roland Scheidegger <sroland@vmware.com> 2012-07-30 14:19:43 UTC ---
This is due to differences in LIT opcode between DX and OGL. AFAIK the chip can
only do the DX version (there's no documentation for this part of the chip, but
r300 could only do this too). Hence to make this opcode work correctly,
complicated workarounds might be needed - given the chip limits (program length
etc.) these might do more wrong than good. So unless you find some real app
where this is a problem noone will bother - not that many programs can use
vertex programs on r200 anyway since often new render paths also would require
fragment program.

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