1 /*
2 * Copyright © 2013 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
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24
25 #include "elk_vec4_vs.h"
26 #include "dev/intel_debug.h"
27
28 namespace elk {
29
30 void
emit_prolog()31 vec4_vs_visitor::emit_prolog()
32 {
33 }
34
35
36 void
emit_urb_write_header(int mrf)37 vec4_vs_visitor::emit_urb_write_header(int mrf)
38 {
39 /* No need to do anything for VS; an implied write to this MRF will be
40 * performed by ELK_VEC4_VS_OPCODE_URB_WRITE.
41 */
42 (void) mrf;
43 }
44
45
46 vec4_instruction *
emit_urb_write_opcode(bool complete)47 vec4_vs_visitor::emit_urb_write_opcode(bool complete)
48 {
49 vec4_instruction *inst = emit(ELK_VEC4_VS_OPCODE_URB_WRITE);
50 inst->urb_write_flags = complete ?
51 ELK_URB_WRITE_EOT_COMPLETE : ELK_URB_WRITE_NO_FLAGS;
52
53 return inst;
54 }
55
56
57 void
emit_urb_slot(dst_reg reg,int varying)58 vec4_vs_visitor::emit_urb_slot(dst_reg reg, int varying)
59 {
60 reg.type = ELK_REGISTER_TYPE_F;
61 output_reg[varying][0].type = reg.type;
62
63 switch (varying) {
64 case VARYING_SLOT_COL0:
65 case VARYING_SLOT_COL1:
66 case VARYING_SLOT_BFC0:
67 case VARYING_SLOT_BFC1: {
68 /* These built-in varyings are only supported in compatibility mode,
69 * and we only support GS in core profile. So, this must be a vertex
70 * shader.
71 */
72 vec4_instruction *inst = emit_generic_urb_slot(reg, varying, 0);
73 if (inst && key->clamp_vertex_color)
74 inst->saturate = true;
75 break;
76 }
77 default:
78 return vec4_visitor::emit_urb_slot(reg, varying);
79 }
80 }
81
82
83 void
emit_thread_end()84 vec4_vs_visitor::emit_thread_end()
85 {
86 /* For VS, we always end the thread by emitting a single vertex.
87 * emit_urb_write_opcode() will take care of setting the eot flag on the
88 * SEND instruction.
89 */
90 emit_vertex();
91 }
92
93
vec4_vs_visitor(const struct elk_compiler * compiler,const struct elk_compile_params * params,const struct elk_vs_prog_key * key,struct elk_vs_prog_data * vs_prog_data,const nir_shader * shader,bool debug_enabled)94 vec4_vs_visitor::vec4_vs_visitor(const struct elk_compiler *compiler,
95 const struct elk_compile_params *params,
96 const struct elk_vs_prog_key *key,
97 struct elk_vs_prog_data *vs_prog_data,
98 const nir_shader *shader,
99 bool debug_enabled)
100 : vec4_visitor(compiler, params, &key->base.tex, &vs_prog_data->base,
101 shader, false /* no_spills */, debug_enabled),
102 key(key),
103 vs_prog_data(vs_prog_data)
104 {
105 }
106
107
108 } /* namespace elk */
109