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i965 gen6: Fix incorrect order of dwords in gen6_update_sol_indices()

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When updating SOL indices, we were accidentally putting the starting
index in dword 1 and the SVBI number to increment in dword 2--these
should be reversed.  Usually both of these values are zero, so we
didn't see any problem.  However, if a transform feedback operation
spans multiple batch buffers, the starting index will be nonzero.

Fixes piglit test "EXT_transform_feedback/intervening-read output".

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Paul Berry
2011-12-23 13:56:07 -08:00
parent b31f62c907
commit e6e9becd50
1 changed files with 1 additions and 1 deletions
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src/mesa/drivers/dri/i965/gen6_sol.c
+1 -1
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@@ -82,8 +82,8 @@ gen6_update_sol_indices(struct brw_context *brw)
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_GS_SVB_INDEX << 16 | (4 - 2));
OUT_BATCH(brw->sol.svbi_0_starting_index); /* BRW_NEW_SOL_INDICES */
OUT_BATCH(0);
OUT_BATCH(brw->sol.svbi_0_starting_index); /* BRW_NEW_SOL_INDICES */
OUT_BATCH(brw->sol.svbi_0_max_index); /* BRW_NEW_SOL_INDICES */
ADVANCE_BATCH();
}