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i965: Reduce the SIMD8 GS push constant threshold from 32 to 24.

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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@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Kenneth Graunke
2016-05-09 18:11:00 -07:00
parent 3aa542c657
commit 607fb0f13d
1 changed files with 2 additions and 2 deletions
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src/mesa/drivers/dri/i965/brw_fs.cpp
+2 -2
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@@ -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.