commit a5efb0eae85106bd89537ed755501a59a9cbbc92
author Francisco Jerez <currojerez@riseup.net> Tue Sep 03 17:31:37 2019 -0700
committer Francisco Jerez <currojerez@riseup.net> Fri Oct 11 12:24:16 2019 -0700
tree ce7e266d3070c5e8d57cfea604f4d57af1c752c5
parent 6b52f813958648d7ba7ae469cac0c0a53ef1987c

intel/fs/gen12: Fix barrier codegen.

The WAIT instruction has been removed, but SYNC.bar can be used
instead to wait for a notification on n0.0.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/intel/compiler/brw_fs_generator.cpp

diff --git a/src/intel/compiler/brw_fs_generator.cpp b/src/intel/compiler/brw_fs_generator.cpp
index ffdcc96..4a39864 100644
--- a/src/intel/compiler/brw_fs_generator.cpp
+++ b/src/intel/compiler/brw_fs_generator.cpp
@@ -783,8 +783,12 @@
 fs_generator::generate_barrier(fs_inst *, struct brw_reg src)
 {
    brw_barrier(p, src);
-   brw_set_default_swsb(p, tgl_swsb_null());
-   brw_WAIT(p);
+   if (devinfo->gen >= 12) {
+      brw_set_default_swsb(p, tgl_swsb_null());
+      brw_SYNC(p, TGL_SYNC_BAR);
+   } else {
+      brw_WAIT(p);
+   }
 }
 
 bool

src/intel/compiler/brw_fs_visitor.cpp

diff --git a/src/intel/compiler/brw_fs_visitor.cpp b/src/intel/compiler/brw_fs_visitor.cpp
index d723e28..6ced1b9 100644
--- a/src/intel/compiler/brw_fs_visitor.cpp
+++ b/src/intel/compiler/brw_fs_visitor.cpp
@@ -920,6 +920,7 @@
    case 10:
       barrier_id_mask = 0x8f000000u; break;
    case 11:
+   case 12:
       barrier_id_mask = 0x7f000000u; break;
    default:
       unreachable("barrier is only available on gen >= 7");