[Mesa-dev] [PATCH 1/2] i965: Reduce the SIMD8 GS push constant threshold from 32 to 24.

[Kenneth Graunke]

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>
---
 src/mesa/drivers/dri/i965/brw_fs.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index ce3e00b..332e382 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -5155,7 +5155,7 @@ fs_visitor::setup_gs_payload()
    }
 
    /* Use a maximum of 32 registers for push-model inputs. */
-   const unsigned max_push_components = 32;
+   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.
-- 
2.8.2