2 * Copyright © 2013 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
25 * \file brw_vec4_tcs.h
27 * The vec4-mode tessellation control shader compiler backend.
30 #ifndef BRW_VEC4_TCS_H
31 #define BRW_VEC4_TCS_H
33 #include "brw_compiler.h"
39 class vec4_tcs_visitor : public vec4_visitor
42 vec4_tcs_visitor(const struct brw_compiler *compiler,
44 const struct brw_tcs_prog_key *key,
45 struct brw_tcs_prog_data *prog_data,
46 const nir_shader *nir,
48 int shader_time_index,
49 const struct brw_vue_map *input_vue_map);
52 virtual dst_reg *make_reg_for_system_value(int location,
53 const glsl_type *type);
54 virtual void nir_setup_system_value_intrinsic(nir_intrinsic_instr *instr);
55 virtual void setup_payload();
56 virtual void emit_prolog();
57 virtual void emit_thread_end();
59 virtual void nir_emit_intrinsic(nir_intrinsic_instr *instr);
61 void emit_input_urb_read(const dst_reg &dst,
62 const src_reg &vertex_index,
64 const src_reg &indirect_offset);
65 void emit_output_urb_read(const dst_reg &dst,
67 const src_reg &indirect_offset);
69 void emit_urb_write(const src_reg &value, unsigned writemask,
70 unsigned base_offset, const src_reg &indirect_offset);
72 /* we do not use the normal end-of-shader URB write mechanism -- but every vec4 stage
73 * must provide implementations of these:
75 virtual void emit_urb_write_header(int mrf) {}
76 virtual vec4_instruction *emit_urb_write_opcode(bool complete) { return NULL; }
78 const struct brw_vue_map *input_vue_map;
80 const struct brw_tcs_prog_key *key;
81 src_reg invocation_id;
85 #endif /* __cplusplus */
87 #endif /* BRW_VEC4_TCS_H */