Mesa (master): i965/fs: Don' t propagate saturation modifiers if there are source modifiers.

[Matt Turner]

Module: Mesa
Branch: master
Commit: 92d03f7f2878b15a41077e1ea11962a47c1d9b29
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=92d03f7f2878b15a41077e1ea11962a47c1d9b29

Author: Matt Turner <mattst88 at gmail.com>
Date:   Thu Apr  3 13:57:44 2014 -0700

i965/fs: Don't propagate saturation modifiers if there are source modifiers.

Which would lead to translating

   mad     vgrf9:F,  vgrf3:F, u0:F, vgrf6:F
   mov.sat vgrf7:F, -vgrf9:F

into

   mad.sat vgrf9:F,  vgrf3:F, u0:F, vgrf6:F
   mov     vgrf7:F, -vgrf9:F

Fixes some lighting effects in Dota2.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76749
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

---

 src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp b/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
index 4f3dcff..35e6774 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
@@ -42,6 +42,8 @@ opt_saturate_propagation_local(fs_visitor *v, bblock_t *block)
       if (inst->opcode != BRW_OPCODE_MOV ||
           inst->dst.file != GRF ||
           inst->src[0].file != GRF ||
+          inst->src[0].abs ||
+          inst->src[0].negate ||
           !inst->saturate)
          continue;