Mesa (master): i965/fs: Don' t propagate saturate modifiers into partial writes.

[Matt Turner]

Module: Mesa
Branch: master
Commit: 7a7b8a02bed5a113fd0f8e45acc0eafdd7227b55
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7a7b8a02bed5a113fd0f8e45acc0eafdd7227b55

Author: Matt Turner <mattst88 at gmail.com>
Date:   Thu Apr  3 14:00:32 2014 -0700

i965/fs: Don't propagate saturate modifiers into partial writes.

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

---

 src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

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 eaecb45..4f3dcff 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_saturate_propagation.cpp
@@ -59,7 +59,8 @@ opt_saturate_propagation_local(fs_visitor *v, bblock_t *block)
 
          if (scan_inst->dst.file == GRF &&
              scan_inst->dst.reg == inst->src[0].reg &&
-             scan_inst->dst.reg_offset == inst->src[0].reg_offset) {
+             scan_inst->dst.reg_offset == inst->src[0].reg_offset &&
+             !scan_inst->is_partial_write()) {
             if (scan_inst->can_do_saturate()) {
                scan_inst->saturate = true;
                inst->saturate = false;