i965: Port tessellation evaluation shaders to vec4 mode.

This can be used on Broadwell by setting INTEL_SCALAR_TES=0.
More importantly, it will be used for Ivybridge and Haswell.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

1 files changed, 69 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vec4_tes.h b/src/mesa/drivers/dri/i965/brw_vec4_tes.h
new file mode 100644
index 0000000..4b697aa
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_vec4_tes.h
@@ -0,0 +1,69 @@
+/*
+ * Copyright © 2013 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.
+ */
+
+/**
+ * \file brw_vec4_tes.h
+ *
+ * The vec4 mode tessellation evaluation shader compiler backend.
+ */
+
+#ifndef BRW_VEC4_TES_H
+#define BRW_VEC4_TES_H
+
+#include "brw_vec4.h"
+
+#ifdef __cplusplus
+namespace brw {
+
+class vec4_tes_visitor : public vec4_visitor
+{
+public:
+   vec4_tes_visitor(const struct brw_compiler *compiler,
+                   void *log_data,
+                   const struct brw_tes_prog_key *key,
+                   struct brw_tes_prog_data *prog_data,
+                   const nir_shader *nir,
+                   void *mem_ctx,
+                   int shader_time_index);
+
+protected:
+   virtual dst_reg *make_reg_for_system_value(int location,
+                                              const glsl_type *type);
+   virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr *instr);
+   virtual void nir_emit_intrinsic(nir_intrinsic_instr *instr);
+
+   virtual void setup_payload();
+   virtual void emit_prolog();
+   virtual void emit_thread_end();
+
+   virtual void emit_urb_write_header(int mrf);
+   virtual vec4_instruction *emit_urb_write_opcode(bool complete);
+
+private:
+   src_reg input_read_header;
+};
+
+} /* namespace brw */
+#endif /* __cplusplus */
+
+#endif /* BRW_VEC4_TES_H */