[Mesa-dev] [PATCH 035/133] i965/fs_nir: Add atomic counters support

[Jason Ekstrand]

---
 src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index dcbcebf..3c8430a 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -1327,9 +1327,28 @@ fs_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
 
    case nir_intrinsic_atomic_counter_inc:
    case nir_intrinsic_atomic_counter_dec:
-   case nir_intrinsic_atomic_counter_read:
-      assert(!"TODO");
-
+   case nir_intrinsic_atomic_counter_read: {
+      unsigned surf_index = prog_data->binding_table.abo_start +
+                            (unsigned) instr->const_index[0];
+      fs_reg offset = fs_reg(get_nir_src(instr->src[0]));
+
+      switch (instr->intrinsic) {
+         case nir_intrinsic_atomic_counter_inc:
+            emit_untyped_atomic(BRW_AOP_INC, surf_index, dest, offset,
+                                fs_reg(), fs_reg());
+            break;
+         case nir_intrinsic_atomic_counter_dec:
+            emit_untyped_atomic(BRW_AOP_PREDEC, surf_index, dest, offset,
+                                fs_reg(), fs_reg());
+            break;
+         case nir_intrinsic_atomic_counter_read:
+            emit_untyped_surface_read(surf_index, dest, offset);
+            break;
+         default:
+            unreachable("Unreachable");
+      }
+      break;
+   }
 
    case nir_intrinsic_load_front_face:
       assert(!"TODO");
-- 
2.2.0