1/*
2 * Copyright © 2014 Intel Corporation
3 *
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:
10 *
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
13 * Software.
14 *
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 DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25#ifndef GEN6_GS_VISITOR_H
26#define GEN6_GS_VISITOR_H
27
28#include "brw_vec4.h"
29#include "brw_vec4_gs_visitor.h"
30
31#ifdef __cplusplus
32
33namespace brw {
34
35class gen6_gs_visitor : public vec4_gs_visitor
36{
37public:
38   gen6_gs_visitor(const struct brw_compiler *comp,
39                   void *log_data,
40                   struct brw_gs_compile *c,
41                   struct brw_gs_prog_data *prog_data,
42                   struct gl_program *prog,
43                   const nir_shader *shader,
44                   void *mem_ctx,
45                   bool no_spills,
46                   int shader_time_index) :
47      vec4_gs_visitor(comp, log_data, c, prog_data, shader, mem_ctx, no_spills,
48                      shader_time_index),
49      prog(prog)
50      {
51      }
52
53protected:
54   virtual void emit_prolog();
55   virtual void emit_thread_end();
56   virtual void gs_emit_vertex(int stream_id);
57   virtual void gs_end_primitive();
58   virtual void emit_urb_write_header(int mrf);
59   virtual void emit_urb_write_opcode(bool complete,
60                                      int base_mrf,
61                                      int last_mrf,
62                                      int urb_offset);
63   virtual void setup_payload();
64
65private:
66   void xfb_write();
67   void xfb_program(unsigned vertex, unsigned num_verts);
68   void xfb_setup();
69   int get_vertex_output_offset_for_varying(int vertex, int varying);
70
71   const struct gl_program *prog;
72
73   src_reg vertex_output;
74   src_reg vertex_output_offset;
75   src_reg temp;
76   src_reg first_vertex;
77   src_reg prim_count;
78   src_reg primitive_id;
79
80   /* Transform Feedback members */
81   src_reg sol_prim_written;
82   src_reg svbi;
83   src_reg max_svbi;
84   src_reg destination_indices;
85};
86
87} /* namespace brw */
88
89#endif /* __cplusplus */
90
91#endif /* GEN6_GS_VISITOR_H */
92