1 /*
2 * Copyright 2017 Advanced Micro Devices, Inc.
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 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 */
23
24 #include "tgsi/tgsi_from_mesa.h"
25
26 #include "pipe/p_compiler.h"
27
28 /**
29 * Determine the semantic index that is used when the given varying is mapped
30 * to TGSI_SEMANTIC_GENERIC.
31 */
32 unsigned
tgsi_get_generic_gl_varying_index(gl_varying_slot attr,bool needs_texcoord_semantic)33 tgsi_get_generic_gl_varying_index(gl_varying_slot attr,
34 bool needs_texcoord_semantic)
35 {
36 if (attr >= VARYING_SLOT_VAR0) {
37 if (needs_texcoord_semantic)
38 return attr - VARYING_SLOT_VAR0;
39 else
40 return 9 + (attr - VARYING_SLOT_VAR0);
41 }
42 if (attr == VARYING_SLOT_PNTC) {
43 assert(!needs_texcoord_semantic);
44 return 8;
45 }
46 if (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7) {
47 assert(!needs_texcoord_semantic);
48 return attr - VARYING_SLOT_TEX0;
49 }
50
51 assert(0);
52 return 0;
53 }
54
55 /**
56 * Determine the semantic name and index used for the given varying.
57 */
58 void
tgsi_get_gl_varying_semantic(gl_varying_slot attr,bool needs_texcoord_semantic,unsigned * semantic_name,unsigned * semantic_index)59 tgsi_get_gl_varying_semantic(gl_varying_slot attr,
60 bool needs_texcoord_semantic,
61 unsigned *semantic_name,
62 unsigned *semantic_index)
63 {
64 switch (attr) {
65 case VARYING_SLOT_PRIMITIVE_ID:
66 *semantic_name = TGSI_SEMANTIC_PRIMID;
67 *semantic_index = 0;
68 break;
69 case VARYING_SLOT_POS:
70 *semantic_name = TGSI_SEMANTIC_POSITION;
71 *semantic_index = 0;
72 break;
73 case VARYING_SLOT_COL0:
74 *semantic_name = TGSI_SEMANTIC_COLOR;
75 *semantic_index = 0;
76 break;
77 case VARYING_SLOT_COL1:
78 *semantic_name = TGSI_SEMANTIC_COLOR;
79 *semantic_index = 1;
80 break;
81 case VARYING_SLOT_BFC0:
82 *semantic_name = TGSI_SEMANTIC_BCOLOR;
83 *semantic_index = 0;
84 break;
85 case VARYING_SLOT_BFC1:
86 *semantic_name = TGSI_SEMANTIC_BCOLOR;
87 *semantic_index = 1;
88 break;
89 case VARYING_SLOT_FOGC:
90 *semantic_name = TGSI_SEMANTIC_FOG;
91 *semantic_index = 0;
92 break;
93 case VARYING_SLOT_PSIZ:
94 *semantic_name = TGSI_SEMANTIC_PSIZE;
95 *semantic_index = 0;
96 break;
97 case VARYING_SLOT_CLIP_DIST0:
98 *semantic_name = TGSI_SEMANTIC_CLIPDIST;
99 *semantic_index = 0;
100 break;
101 case VARYING_SLOT_CLIP_DIST1:
102 *semantic_name = TGSI_SEMANTIC_CLIPDIST;
103 *semantic_index = 1;
104 break;
105 case VARYING_SLOT_CULL_DIST0:
106 case VARYING_SLOT_CULL_DIST1:
107 /* these should have been lowered by GLSL */
108 assert(0);
109 break;
110 case VARYING_SLOT_EDGE:
111 *semantic_name = TGSI_SEMANTIC_EDGEFLAG;
112 *semantic_index = 0;
113 break;
114 case VARYING_SLOT_CLIP_VERTEX:
115 *semantic_name = TGSI_SEMANTIC_CLIPVERTEX;
116 *semantic_index = 0;
117 break;
118 case VARYING_SLOT_LAYER:
119 *semantic_name = TGSI_SEMANTIC_LAYER;
120 *semantic_index = 0;
121 break;
122 case VARYING_SLOT_VIEWPORT:
123 *semantic_name = TGSI_SEMANTIC_VIEWPORT_INDEX;
124 *semantic_index = 0;
125 break;
126 case VARYING_SLOT_FACE:
127 *semantic_name = TGSI_SEMANTIC_FACE;
128 *semantic_index = 0;
129 break;
130 case VARYING_SLOT_PNTC:
131 *semantic_name = TGSI_SEMANTIC_PCOORD;
132 *semantic_index = 0;
133 break;
134 case VARYING_SLOT_TESS_LEVEL_OUTER:
135 *semantic_name = TGSI_SEMANTIC_TESSOUTER;
136 *semantic_index = 0;
137 break;
138 case VARYING_SLOT_TESS_LEVEL_INNER:
139 *semantic_name = TGSI_SEMANTIC_TESSINNER;
140 *semantic_index = 0;
141 break;
142 case VARYING_SLOT_VIEWPORT_MASK:
143 *semantic_name = TGSI_SEMANTIC_VIEWPORT_MASK;
144 *semantic_index = 0;
145 break;
146
147 case VARYING_SLOT_TEX0:
148 case VARYING_SLOT_TEX1:
149 case VARYING_SLOT_TEX2:
150 case VARYING_SLOT_TEX3:
151 case VARYING_SLOT_TEX4:
152 case VARYING_SLOT_TEX5:
153 case VARYING_SLOT_TEX6:
154 case VARYING_SLOT_TEX7:
155 if (needs_texcoord_semantic) {
156 *semantic_name = TGSI_SEMANTIC_TEXCOORD;
157 *semantic_index = attr - VARYING_SLOT_TEX0;
158 break;
159 }
160 /* fall through */
161 case VARYING_SLOT_VAR0:
162 default:
163 assert(attr >= VARYING_SLOT_VAR0 ||
164 (attr >= VARYING_SLOT_TEX0 && attr <= VARYING_SLOT_TEX7));
165 if (attr >= VARYING_SLOT_PATCH0) {
166 *semantic_name = TGSI_SEMANTIC_PATCH;
167 *semantic_index = attr - VARYING_SLOT_PATCH0;
168 } else {
169 *semantic_name = TGSI_SEMANTIC_GENERIC;
170 *semantic_index =
171 tgsi_get_generic_gl_varying_index(attr, needs_texcoord_semantic);
172 }
173 break;
174 }
175 }
176
177 /**
178 * Determine the semantic name and index used for the given fragment shader
179 * result.
180 */
181 void
tgsi_get_gl_frag_result_semantic(gl_frag_result frag_result,unsigned * semantic_name,unsigned * semantic_index)182 tgsi_get_gl_frag_result_semantic(gl_frag_result frag_result,
183 unsigned *semantic_name,
184 unsigned *semantic_index)
185 {
186 if (frag_result >= FRAG_RESULT_DATA0) {
187 *semantic_name = TGSI_SEMANTIC_COLOR;
188 *semantic_index = frag_result - FRAG_RESULT_DATA0;
189 return;
190 }
191
192 *semantic_index = 0;
193
194 switch (frag_result) {
195 case FRAG_RESULT_DEPTH:
196 *semantic_name = TGSI_SEMANTIC_POSITION;
197 break;
198 case FRAG_RESULT_STENCIL:
199 *semantic_name = TGSI_SEMANTIC_STENCIL;
200 break;
201 case FRAG_RESULT_COLOR:
202 *semantic_name = TGSI_SEMANTIC_COLOR;
203 break;
204 case FRAG_RESULT_SAMPLE_MASK:
205 *semantic_name = TGSI_SEMANTIC_SAMPLEMASK;
206 break;
207 default:
208 assert(false);
209 }
210 }
211
212 /** Map Mesa's SYSTEM_VALUE_x to TGSI_SEMANTIC_x */
213 enum tgsi_semantic
tgsi_get_sysval_semantic(unsigned sysval)214 tgsi_get_sysval_semantic(unsigned sysval)
215 {
216 switch (sysval) {
217 /* Vertex shader */
218 case SYSTEM_VALUE_VERTEX_ID:
219 return TGSI_SEMANTIC_VERTEXID;
220 case SYSTEM_VALUE_INSTANCE_ID:
221 return TGSI_SEMANTIC_INSTANCEID;
222 case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
223 return TGSI_SEMANTIC_VERTEXID_NOBASE;
224 case SYSTEM_VALUE_BASE_VERTEX:
225 return TGSI_SEMANTIC_BASEVERTEX;
226 case SYSTEM_VALUE_BASE_INSTANCE:
227 return TGSI_SEMANTIC_BASEINSTANCE;
228 case SYSTEM_VALUE_DRAW_ID:
229 return TGSI_SEMANTIC_DRAWID;
230
231 /* Geometry shader */
232 case SYSTEM_VALUE_INVOCATION_ID:
233 return TGSI_SEMANTIC_INVOCATIONID;
234
235 /* Fragment shader */
236 case SYSTEM_VALUE_FRAG_COORD:
237 return TGSI_SEMANTIC_POSITION;
238 case SYSTEM_VALUE_POINT_COORD:
239 return TGSI_SEMANTIC_PCOORD;
240 case SYSTEM_VALUE_FRONT_FACE:
241 return TGSI_SEMANTIC_FACE;
242 case SYSTEM_VALUE_SAMPLE_ID:
243 return TGSI_SEMANTIC_SAMPLEID;
244 case SYSTEM_VALUE_SAMPLE_POS:
245 return TGSI_SEMANTIC_SAMPLEPOS;
246 case SYSTEM_VALUE_SAMPLE_MASK_IN:
247 return TGSI_SEMANTIC_SAMPLEMASK;
248 case SYSTEM_VALUE_HELPER_INVOCATION:
249 return TGSI_SEMANTIC_HELPER_INVOCATION;
250
251 /* Tessellation shader */
252 case SYSTEM_VALUE_TESS_COORD:
253 return TGSI_SEMANTIC_TESSCOORD;
254 case SYSTEM_VALUE_VERTICES_IN:
255 return TGSI_SEMANTIC_VERTICESIN;
256 case SYSTEM_VALUE_PRIMITIVE_ID:
257 return TGSI_SEMANTIC_PRIMID;
258 case SYSTEM_VALUE_TESS_LEVEL_OUTER:
259 return TGSI_SEMANTIC_TESSOUTER;
260 case SYSTEM_VALUE_TESS_LEVEL_INNER:
261 return TGSI_SEMANTIC_TESSINNER;
262
263 /* Compute shader */
264 case SYSTEM_VALUE_LOCAL_INVOCATION_ID:
265 return TGSI_SEMANTIC_THREAD_ID;
266 case SYSTEM_VALUE_WORK_GROUP_ID:
267 return TGSI_SEMANTIC_BLOCK_ID;
268 case SYSTEM_VALUE_NUM_WORK_GROUPS:
269 return TGSI_SEMANTIC_GRID_SIZE;
270 case SYSTEM_VALUE_LOCAL_GROUP_SIZE:
271 return TGSI_SEMANTIC_BLOCK_SIZE;
272
273 /* ARB_shader_ballot */
274 case SYSTEM_VALUE_SUBGROUP_SIZE:
275 return TGSI_SEMANTIC_SUBGROUP_SIZE;
276 case SYSTEM_VALUE_SUBGROUP_INVOCATION:
277 return TGSI_SEMANTIC_SUBGROUP_INVOCATION;
278 case SYSTEM_VALUE_SUBGROUP_EQ_MASK:
279 return TGSI_SEMANTIC_SUBGROUP_EQ_MASK;
280 case SYSTEM_VALUE_SUBGROUP_GE_MASK:
281 return TGSI_SEMANTIC_SUBGROUP_GE_MASK;
282 case SYSTEM_VALUE_SUBGROUP_GT_MASK:
283 return TGSI_SEMANTIC_SUBGROUP_GT_MASK;
284 case SYSTEM_VALUE_SUBGROUP_LE_MASK:
285 return TGSI_SEMANTIC_SUBGROUP_LE_MASK;
286 case SYSTEM_VALUE_SUBGROUP_LT_MASK:
287 return TGSI_SEMANTIC_SUBGROUP_LT_MASK;
288
289 default:
290 unreachable("Unexpected system value to TGSI");
291 }
292 }
293
294 enum tgsi_interpolate_mode
tgsi_get_interp_mode(enum glsl_interp_mode mode,bool color)295 tgsi_get_interp_mode(enum glsl_interp_mode mode, bool color)
296 {
297 switch (mode) {
298 case INTERP_MODE_NONE:
299 return color ? TGSI_INTERPOLATE_COLOR : TGSI_INTERPOLATE_PERSPECTIVE;
300 case INTERP_MODE_FLAT:
301 return TGSI_INTERPOLATE_CONSTANT;
302 case INTERP_MODE_NOPERSPECTIVE:
303 return TGSI_INTERPOLATE_LINEAR;
304 case INTERP_MODE_SMOOTH:
305 return TGSI_INTERPOLATE_PERSPECTIVE;
306 default:
307 unreachable("unknown interpolation mode");
308 }
309 }
310