[Mesa-dev] [PATCH 3/3] i965/fs: Don't propagate saturation modifiers if there are source modifiers.

[Matt Turner]

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
---
 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;
 
-- 
1.8.3.2