Since they're actually GRFs, we can read from them.
total instructions in shared programs: 852751 -> 851371 (-0.16%)
instructions in affected programs: 227286 -> 225906 (-0.61%)
(no regressions)
---
src/mesa/drivers/dri/i965/brw_fs.cpp | 22 ++++++++++++----------
1 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp
b/src/mesa/drivers/dri/i965/brw_fs.cpp
index c12ba45..57be319 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -2121,16 +2121,18 @@ fs_visitor::compute_to_mrf()
/* You can't read from an MRF, so if someone else reads our
* MRF's source GRF that we wanted to rewrite, that stops us.
*/
- bool interfered = false;
- for (int i = 0; i < 3; i++) {
- if (scan_inst->src[i].file == GRF &&
- scan_inst->src[i].reg == inst->src[0].reg &&
- scan_inst->src[i].reg_offset == inst->src[0].reg_offset) {
- interfered = true;
- }
- }
- if (interfered)
- break;
+ if (intel->gen < 7) {
+ bool interfered = false;
+ for (int i = 0; i < 3; i++) {
+ if (scan_inst->src[i].file == GRF &&
+ scan_inst->src[i].reg == inst->src[0].reg &&
+ scan_inst->src[i].reg_offset == inst->src[0].reg_offset) {
+ interfered = true;
+ }
+ }
+ if (interfered)
+ break;
+ }
if (scan_inst->dst.file == MRF) {
/* If somebody else writes our MRF here, we can't
--
1.7.8.6
_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
