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i965: Disable PrimitiveID upload.

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We currently don't support gl_PrimitiveID, and I believe asking the
hardware to generate it results in vertex cache invalidations.

This could result in slowdowns for applications that use gl_InstanceID,
which would be counter-productive.  Just turn it off for now.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Kenneth Graunke
2012-02-27 11:43:10 -08:00
parent e9bcdc2c37
commit c59bdee12e
1 changed files with 1 additions and 1 deletions
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src/mesa/drivers/dri/i965/brw_draw_upload.c
+1 -1
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@@ -731,7 +731,7 @@ static void brw_emit_vertices(struct brw_context *brw)
dw1 = ((BRW_VE1_COMPONENT_STORE_VID << BRW_VE1_COMPONENT_0_SHIFT) |
(BRW_VE1_COMPONENT_STORE_IID << BRW_VE1_COMPONENT_1_SHIFT) |
(BRW_VE1_COMPONENT_STORE_PID << BRW_VE1_COMPONENT_2_SHIFT) |
(BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_2_SHIFT) |
(BRW_VE1_COMPONENT_STORE_0 << BRW_VE1_COMPONENT_3_SHIFT));
if (intel->gen >= 6) {