[Mesa-dev] [PATCH 16/23] i965: Revisit NIR atomic counter intrinsic translation.

[Francisco Jerez]

---
 src/mesa/drivers/dri/i965/Makefile.sources     |  1 +
 src/mesa/drivers/dri/i965/brw_nir_intrinsics.h | 80 ++++++++++++++++++++++++++
 2 files changed, 81 insertions(+)
 create mode 100644 src/mesa/drivers/dri/i965/brw_nir_intrinsics.h

diff --git a/src/mesa/drivers/dri/i965/Makefile.sources b/src/mesa/drivers/dri/i965/Makefile.sources
index fd6d840..d07b6fe 100644
--- a/src/mesa/drivers/dri/i965/Makefile.sources
+++ b/src/mesa/drivers/dri/i965/Makefile.sources
@@ -82,6 +82,7 @@ i965_FILES = \
 	brw_multisample_state.h \
 	brw_nir.h \
 	brw_nir.c \
+	brw_nir_intrinsics.h \
 	brw_nir_analyze_boolean_resolves.c \
 	brw_object_purgeable.c \
 	brw_packed_float.c \
diff --git a/src/mesa/drivers/dri/i965/brw_nir_intrinsics.h b/src/mesa/drivers/dri/i965/brw_nir_intrinsics.h
new file mode 100644
index 0000000..65edc40
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_nir_intrinsics.h
@@ -0,0 +1,80 @@
+/* -*- c++ -*- */
+/*
+ * Copyright © 2014-2015 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef BRW_NIR_INTRINSICS_H
+#define BRW_NIR_INTRINSICS_H
+
+#include "brw_ir_surface_builder.h"
+#include "main/shaderimage.h"
+
+namespace brw {
+   /**
+    * Entry point for translating NIR atomic counter intrinsics.
+    */
+   template<typename V, typename B>
+   void
+   emit_atomic_counter_intrinsic(V *v, const B &bld,
+                                 const nir_intrinsic_instr *instr)
+   {
+      using namespace surface_access;
+      typedef typename B::vector_builder::src_reg src_reg;
+      typename B::vector_builder vbld = bld.vector();
+
+      /* Get the arguments of the atomic intrinsic. */
+      const src_reg offset(v->get_nir_src(instr->src[0]));
+      const src_reg surface(v->stage_prog_data->binding_table.abo_start +
+                            instr->const_index[0]);
+
+      /* Get some metadata from the atomic intrinsic. */
+      const unsigned rsize = (nir_intrinsic_infos[instr->intrinsic].has_dest ?
+                              1 : 0);
+      src_reg tmp;
+
+      /* Emit a surface read or atomic op. */
+      switch (instr->intrinsic) {
+      case nir_intrinsic_atomic_counter_read:
+         tmp = emit_untyped_read(vbld, surface, offset, 1, 1);
+         break;
+
+      case nir_intrinsic_atomic_counter_inc:
+         tmp = emit_untyped_atomic(vbld, surface, offset, src_reg(),
+                                   src_reg(), 1, rsize, BRW_AOP_INC);
+         break;
+
+      case nir_intrinsic_atomic_counter_dec:
+         tmp = emit_untyped_atomic(vbld, surface, offset, src_reg(),
+                                   src_reg(), 1, rsize, BRW_AOP_PREDEC);
+         break;
+
+      default:
+         unreachable("Unreachable");
+      }
+
+      /* Assign the result. */
+      if (rsize)
+         vbld.MOV(v->get_nir_dest(instr->dest), tmp);
+   }
+}
+
+#endif
-- 
2.3.5