1 /*
2 * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.com>
3 * Copyright 2009 Marek Olšák <maraeo@gmail.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24 #include "r300_vs.h"
25
26 #include "r300_context.h"
27 #include "r300_screen.h"
28 #include "r300_tgsi_to_rc.h"
29 #include "r300_reg.h"
30
31 #include "tgsi/tgsi_dump.h"
32 #include "tgsi/tgsi_parse.h"
33 #include "tgsi/tgsi_ureg.h"
34
35 #include "compiler/radeon_compiler.h"
36
37 /* Convert info about VS output semantics into r300_shader_semantics. */
r300_shader_read_vs_outputs(struct r300_context * r300,struct tgsi_shader_info * info,struct r300_shader_semantics * vs_outputs)38 static void r300_shader_read_vs_outputs(
39 struct r300_context *r300,
40 struct tgsi_shader_info* info,
41 struct r300_shader_semantics* vs_outputs)
42 {
43 int i;
44 unsigned index;
45
46 r300_shader_semantics_reset(vs_outputs);
47
48 for (i = 0; i < info->num_outputs; i++) {
49 index = info->output_semantic_index[i];
50
51 switch (info->output_semantic_name[i]) {
52 case TGSI_SEMANTIC_POSITION:
53 assert(index == 0);
54 vs_outputs->pos = i;
55 break;
56
57 case TGSI_SEMANTIC_PSIZE:
58 assert(index == 0);
59 vs_outputs->psize = i;
60 break;
61
62 case TGSI_SEMANTIC_COLOR:
63 assert(index < ATTR_COLOR_COUNT);
64 vs_outputs->color[index] = i;
65 break;
66
67 case TGSI_SEMANTIC_BCOLOR:
68 assert(index < ATTR_COLOR_COUNT);
69 vs_outputs->bcolor[index] = i;
70 break;
71
72 case TGSI_SEMANTIC_GENERIC:
73 assert(index < ATTR_GENERIC_COUNT);
74 vs_outputs->generic[index] = i;
75 vs_outputs->num_generic++;
76 break;
77
78 case TGSI_SEMANTIC_FOG:
79 assert(index == 0);
80 vs_outputs->fog = i;
81 break;
82
83 case TGSI_SEMANTIC_EDGEFLAG:
84 assert(index == 0);
85 fprintf(stderr, "r300 VP: cannot handle edgeflag output.\n");
86 break;
87
88 case TGSI_SEMANTIC_CLIPVERTEX:
89 assert(index == 0);
90 /* Draw does clip vertex for us. */
91 if (r300->screen->caps.has_tcl) {
92 fprintf(stderr, "r300 VP: cannot handle clip vertex output.\n");
93 }
94 break;
95
96 default:
97 fprintf(stderr, "r300 VP: unknown vertex output semantic: %i.\n",
98 info->output_semantic_name[i]);
99 }
100 }
101
102 /* WPOS is a straight copy of POSITION */
103 vs_outputs->wpos = i;
104 }
105
set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)106 static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
107 {
108 struct r300_vertex_shader_code * vs = c->UserData;
109 struct r300_shader_semantics* outputs = &vs->outputs;
110 struct tgsi_shader_info* info = &vs->info;
111 int i, reg = 0;
112 boolean any_bcolor_used = outputs->bcolor[0] != ATTR_UNUSED ||
113 outputs->bcolor[1] != ATTR_UNUSED;
114
115 /* Fill in the input mapping */
116 for (i = 0; i < info->num_inputs; i++)
117 c->code->inputs[i] = i;
118
119 /* Position. */
120 if (outputs->pos != ATTR_UNUSED) {
121 c->code->outputs[outputs->pos] = reg++;
122 } else {
123 assert(0);
124 }
125
126 /* Point size. */
127 if (outputs->psize != ATTR_UNUSED) {
128 c->code->outputs[outputs->psize] = reg++;
129 }
130
131 /* If we're writing back facing colors we need to send
132 * four colors to make front/back face colors selection work.
133 * If the vertex program doesn't write all 4 colors, lets
134 * pretend it does by skipping output index reg so the colors
135 * get written into appropriate output vectors.
136 */
137
138 /* Colors. */
139 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
140 if (outputs->color[i] != ATTR_UNUSED) {
141 c->code->outputs[outputs->color[i]] = reg++;
142 } else if (any_bcolor_used ||
143 outputs->color[1] != ATTR_UNUSED) {
144 reg++;
145 }
146 }
147
148 /* Back-face colors. */
149 for (i = 0; i < ATTR_COLOR_COUNT; i++) {
150 if (outputs->bcolor[i] != ATTR_UNUSED) {
151 c->code->outputs[outputs->bcolor[i]] = reg++;
152 } else if (any_bcolor_used) {
153 reg++;
154 }
155 }
156
157 /* Texture coordinates. */
158 for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
159 if (outputs->generic[i] != ATTR_UNUSED) {
160 c->code->outputs[outputs->generic[i]] = reg++;
161 }
162 }
163
164 /* Fog coordinates. */
165 if (outputs->fog != ATTR_UNUSED) {
166 c->code->outputs[outputs->fog] = reg++;
167 }
168
169 /* WPOS. */
170 if (vs->wpos)
171 c->code->outputs[outputs->wpos] = reg++;
172 }
173
r300_init_vs_outputs(struct r300_context * r300,struct r300_vertex_shader * vs)174 void r300_init_vs_outputs(struct r300_context *r300,
175 struct r300_vertex_shader *vs)
176 {
177 tgsi_scan_shader(vs->state.tokens, &vs->shader->info);
178 r300_shader_read_vs_outputs(r300, &vs->shader->info, &vs->shader->outputs);
179 }
180
r300_translate_vertex_shader(struct r300_context * r300,struct r300_vertex_shader * shader)181 void r300_translate_vertex_shader(struct r300_context *r300,
182 struct r300_vertex_shader *shader)
183 {
184 struct r300_vertex_program_compiler compiler;
185 struct tgsi_to_rc ttr;
186 unsigned i;
187 struct r300_vertex_shader_code *vs = shader->shader;
188
189 r300_init_vs_outputs(r300, shader);
190
191 /* Setup the compiler */
192 memset(&compiler, 0, sizeof(compiler));
193 rc_init(&compiler.Base, NULL);
194
195 DBG_ON(r300, DBG_VP) ? compiler.Base.Debug |= RC_DBG_LOG : 0;
196 compiler.code = &vs->code;
197 compiler.UserData = vs;
198 compiler.Base.debug = &r300->debug;
199 compiler.Base.is_r500 = r300->screen->caps.is_r500;
200 compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT);
201 compiler.Base.has_half_swizzles = FALSE;
202 compiler.Base.has_presub = FALSE;
203 compiler.Base.has_omod = FALSE;
204 compiler.Base.needs_trig_input_transform = DBG_ON(r300, DBG_USE_TGSI);
205 compiler.Base.max_temp_regs = 32;
206 compiler.Base.max_constants = 256;
207 compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;
208
209 if (compiler.Base.Debug & RC_DBG_LOG) {
210 DBG(r300, DBG_VP, "r300: Initial vertex program\n");
211 tgsi_dump(shader->state.tokens, 0);
212 }
213
214 /* Translate TGSI to our internal representation */
215 ttr.compiler = &compiler.Base;
216 ttr.info = &vs->info;
217 ttr.use_half_swizzles = FALSE;
218
219 r300_tgsi_to_rc(&ttr, shader->state.tokens);
220
221 if (ttr.error) {
222 fprintf(stderr, "r300 VP: Cannot translate a shader. "
223 "Corresponding draws will be skipped.\n");
224 vs->dummy = TRUE;
225 return;
226 }
227
228 if (compiler.Base.Program.Constants.Count > 200) {
229 compiler.Base.remove_unused_constants = TRUE;
230 }
231
232 compiler.RequiredOutputs = ~(~0U << (vs->info.num_outputs + (vs->wpos ? 1 : 0)));
233 compiler.SetHwInputOutput = &set_vertex_inputs_outputs;
234
235 /* Insert the WPOS output. */
236 if (vs->wpos)
237 rc_copy_output(&compiler.Base, vs->outputs.pos, vs->outputs.wpos);
238
239 /* Invoke the compiler */
240 r3xx_compile_vertex_program(&compiler);
241 if (compiler.Base.Error) {
242 fprintf(stderr, "r300 VP: Compiler error:\n%sCorresponding draws will be"
243 " skipped.\n", compiler.Base.ErrorMsg);
244
245 rc_destroy(&compiler.Base);
246 vs->dummy = TRUE;
247 return;
248 }
249
250 /* Initialize numbers of constants for each type. */
251 vs->externals_count = 0;
252 for (i = 0;
253 i < vs->code.constants.Count &&
254 vs->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
255 vs->externals_count = i+1;
256 }
257 for (; i < vs->code.constants.Count; i++) {
258 assert(vs->code.constants.Constants[i].Type == RC_CONSTANT_IMMEDIATE);
259 }
260 vs->immediates_count = vs->code.constants.Count - vs->externals_count;
261
262 /* And, finally... */
263 rc_destroy(&compiler.Base);
264 }
265