Mesa (master): i965: Reduce the SIMD8 GS push constant threshold from 32 to 24.
Kenneth Graunke
kwg at kemper.freedesktop.org
Thu May 12 08:07:10 UTC 2016
Module: Mesa
Branch: master
Commit: 607fb0f13df8e328ed5d173c98fc250449c55aee
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=607fb0f13df8e328ed5d173c98fc250449c55aee
Author: Kenneth Graunke <kenneth at whitecape.org>
Date: Mon May 9 18:11:00 2016 -0700
i965: Reduce the SIMD8 GS push constant threshold from 32 to 24.
Three Shadow of Mordor geometry shaders increase by a single
instruction, but the number of spills/fills in Orbital Explorer
is reduced from 194:1279 -> 82:454. No other programs are affected.
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen at intel.com>
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 2a542b8..89b30c7 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -5229,8 +5229,8 @@ fs_visitor::setup_gs_payload()
payload.num_regs++;
}
- /* Use a maximum of 32 registers for push-model inputs. */
- const unsigned max_push_components = 32;
+ /* Use a maximum of 24 registers for push-model inputs. */
+ const unsigned max_push_components = 24;
/* If pushing our inputs would take too many registers, reduce the URB read
* length (which is in HWords, or 8 registers), and resort to pulling.
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