Mesa (master): i965/vs/gen7: Allow MATH instructions to have MRF as a destination

[Matt Turner]

Module: Mesa
Branch: master
Commit: f0213b124259804ce8e114575fe9058dffdf5864
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f0213b124259804ce8e114575fe9058dffdf5864

Author: Matt Turner <mattst88 at gmail.com>
Date:   Tue Feb 12 15:50:43 2013 -0800

i965/vs/gen7: Allow MATH instructions to have MRF as a destination

total instructions in shared programs: 346873 -> 346847 (-0.01%)
instructions in affected programs:     364 -> 338 (-7.14%)

(All affected shaders are from Lightsmark)

Reviewed-by: Eric Anholt <eric at anholt.net>

---

 src/mesa/drivers/dri/i965/brw_vec4.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index d5b7cb7..70f6b9d 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -753,7 +753,7 @@ vec4_visitor::opt_register_coalesce()
                if (scan_inst->mlen)
                   break;
 
-               if (intel->gen >= 6) {
+               if (intel->gen == 6) {
                   /* gen6 math instructions must have the destination be
                    * GRF, so no compute-to-MRF for them.
                    */