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radeonsi/nir: set TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL correctly
[mesa.git] / src / gallium / drivers / radeonsi / si_shader_nir.c
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 "si_shader.h"
25 #include "si_shader_internal.h"
26
27 #include "ac_nir_to_llvm.h"
28
29 #include "tgsi/tgsi_from_mesa.h"
30
31 #include "compiler/nir/nir.h"
32 #include "compiler/nir_types.h"
33
34
35 static int
36 type_size(const struct glsl_type *type)
37 {
38 return glsl_count_attribute_slots(type, false);
39 }
40
41 static void scan_instruction(struct tgsi_shader_info *info,
42 nir_instr *instr)
43 {
44 if (instr->type == nir_instr_type_alu) {
45 nir_alu_instr *alu = nir_instr_as_alu(instr);
46
47 switch (alu->op) {
48 case nir_op_fddx:
49 case nir_op_fddy:
50 case nir_op_fddx_fine:
51 case nir_op_fddy_fine:
52 case nir_op_fddx_coarse:
53 case nir_op_fddy_coarse:
54 info->uses_derivatives = true;
55 break;
56 default:
57 break;
58 }
59 } else if (instr->type == nir_instr_type_tex) {
60 nir_tex_instr *tex = nir_instr_as_tex(instr);
61
62 if (!tex->texture) {
63 info->samplers_declared |=
64 u_bit_consecutive(tex->sampler_index, 1);
65 }
66
67 switch (tex->op) {
68 case nir_texop_tex:
69 case nir_texop_txb:
70 case nir_texop_lod:
71 info->uses_derivatives = true;
72 break;
73 default:
74 break;
75 }
76 } else if (instr->type == nir_instr_type_intrinsic) {
77 nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
78
79 switch (intr->intrinsic) {
80 case nir_intrinsic_load_front_face:
81 info->uses_frontface = 1;
82 break;
83 case nir_intrinsic_load_instance_id:
84 info->uses_instanceid = 1;
85 break;
86 case nir_intrinsic_load_invocation_id:
87 info->uses_invocationid = true;
88 break;
89 case nir_intrinsic_load_num_work_groups:
90 info->uses_grid_size = true;
91 break;
92 case nir_intrinsic_load_local_group_size:
93 /* The block size is translated to IMM with a fixed block size. */
94 if (info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] == 0)
95 info->uses_block_size = true;
96 break;
97 case nir_intrinsic_load_local_invocation_id:
98 case nir_intrinsic_load_work_group_id: {
99 unsigned mask = nir_ssa_def_components_read(&intr->dest.ssa);
100 while (mask) {
101 unsigned i = u_bit_scan(&mask);
102
103 if (intr->intrinsic == nir_intrinsic_load_work_group_id)
104 info->uses_block_id[i] = true;
105 else
106 info->uses_thread_id[i] = true;
107 }
108 break;
109 }
110 case nir_intrinsic_load_vertex_id:
111 info->uses_vertexid = 1;
112 break;
113 case nir_intrinsic_load_vertex_id_zero_base:
114 info->uses_vertexid_nobase = 1;
115 break;
116 case nir_intrinsic_load_base_vertex:
117 info->uses_basevertex = 1;
118 break;
119 case nir_intrinsic_load_primitive_id:
120 info->uses_primid = 1;
121 break;
122 case nir_intrinsic_load_sample_mask_in:
123 info->reads_samplemask = true;
124 break;
125 case nir_intrinsic_load_tess_level_inner:
126 case nir_intrinsic_load_tess_level_outer:
127 info->reads_tess_factors = true;
128 break;
129 case nir_intrinsic_image_store:
130 case nir_intrinsic_image_atomic_add:
131 case nir_intrinsic_image_atomic_min:
132 case nir_intrinsic_image_atomic_max:
133 case nir_intrinsic_image_atomic_and:
134 case nir_intrinsic_image_atomic_or:
135 case nir_intrinsic_image_atomic_xor:
136 case nir_intrinsic_image_atomic_exchange:
137 case nir_intrinsic_image_atomic_comp_swap:
138 case nir_intrinsic_store_ssbo:
139 case nir_intrinsic_ssbo_atomic_add:
140 case nir_intrinsic_ssbo_atomic_imin:
141 case nir_intrinsic_ssbo_atomic_umin:
142 case nir_intrinsic_ssbo_atomic_imax:
143 case nir_intrinsic_ssbo_atomic_umax:
144 case nir_intrinsic_ssbo_atomic_and:
145 case nir_intrinsic_ssbo_atomic_or:
146 case nir_intrinsic_ssbo_atomic_xor:
147 case nir_intrinsic_ssbo_atomic_exchange:
148 case nir_intrinsic_ssbo_atomic_comp_swap:
149 info->writes_memory = true;
150 break;
151 case nir_intrinsic_load_var: {
152 nir_variable *var = intr->variables[0]->var;
153 nir_variable_mode mode = var->data.mode;
154 enum glsl_base_type base_type =
155 glsl_get_base_type(glsl_without_array(var->type));
156
157 if (mode == nir_var_shader_in) {
158 switch (var->data.interpolation) {
159 case INTERP_MODE_NONE:
160 if (glsl_base_type_is_integer(base_type))
161 break;
162
163 /* fall-through */
164 case INTERP_MODE_SMOOTH:
165 if (var->data.sample)
166 info->uses_persp_sample = true;
167 else if (var->data.centroid)
168 info->uses_persp_centroid = true;
169 else
170 info->uses_persp_center = true;
171 break;
172
173 case INTERP_MODE_NOPERSPECTIVE:
174 if (var->data.sample)
175 info->uses_linear_sample = true;
176 else if (var->data.centroid)
177 info->uses_linear_centroid = true;
178 else
179 info->uses_linear_center = true;
180 break;
181 }
182 }
183 break;
184 }
185 case nir_intrinsic_interp_var_at_centroid:
186 case nir_intrinsic_interp_var_at_sample:
187 case nir_intrinsic_interp_var_at_offset: {
188 enum glsl_interp_mode interp =
189 intr->variables[0]->var->data.interpolation;
190 switch (interp) {
191 case INTERP_MODE_SMOOTH:
192 case INTERP_MODE_NONE:
193 if (intr->intrinsic == nir_intrinsic_interp_var_at_centroid)
194 info->uses_persp_opcode_interp_centroid = true;
195 else if (intr->intrinsic == nir_intrinsic_interp_var_at_sample)
196 info->uses_persp_opcode_interp_sample = true;
197 else
198 info->uses_persp_opcode_interp_offset = true;
199 break;
200 case INTERP_MODE_NOPERSPECTIVE:
201 if (intr->intrinsic == nir_intrinsic_interp_var_at_centroid)
202 info->uses_linear_opcode_interp_centroid = true;
203 else if (intr->intrinsic == nir_intrinsic_interp_var_at_sample)
204 info->uses_linear_opcode_interp_sample = true;
205 else
206 info->uses_linear_opcode_interp_offset = true;
207 break;
208 case INTERP_MODE_FLAT:
209 break;
210 default:
211 unreachable("Unsupported interpoation type");
212 }
213 break;
214 }
215 default:
216 break;
217 }
218 }
219 }
220
221 void si_nir_scan_tess_ctrl(const struct nir_shader *nir,
222 const struct tgsi_shader_info *info,
223 struct tgsi_tessctrl_info *out)
224 {
225 memset(out, 0, sizeof(*out));
226
227 if (nir->info.stage != MESA_SHADER_TESS_CTRL)
228 return;
229
230 /* Initial value = true. Here the pass will accumulate results from
231 * multiple segments surrounded by barriers. If tess factors aren't
232 * written at all, it's a shader bug and we don't care if this will be
233 * true.
234 */
235 out->tessfactors_are_def_in_all_invocs = true;
236
237 /* TODO: Implement scanning of tess factors, see tgsi backend. */
238 }
239
240 void si_nir_scan_shader(const struct nir_shader *nir,
241 struct tgsi_shader_info *info)
242 {
243 nir_function *func;
244 unsigned i;
245
246 info->processor = pipe_shader_type_from_mesa(nir->info.stage);
247 info->num_tokens = 2; /* indicate that the shader is non-empty */
248 info->num_instructions = 2;
249
250 if (nir->info.stage == MESA_SHADER_TESS_CTRL) {
251 info->properties[TGSI_PROPERTY_TCS_VERTICES_OUT] =
252 nir->info.tess.tcs_vertices_out;
253 }
254
255 if (nir->info.stage == MESA_SHADER_TESS_EVAL) {
256 if (nir->info.tess.primitive_mode == GL_ISOLINES)
257 info->properties[TGSI_PROPERTY_TES_PRIM_MODE] = PIPE_PRIM_LINES;
258 else
259 info->properties[TGSI_PROPERTY_TES_PRIM_MODE] = nir->info.tess.primitive_mode;
260
261 STATIC_ASSERT((TESS_SPACING_EQUAL + 1) % 3 == PIPE_TESS_SPACING_EQUAL);
262 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_ODD + 1) % 3 ==
263 PIPE_TESS_SPACING_FRACTIONAL_ODD);
264 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_EVEN + 1) % 3 ==
265 PIPE_TESS_SPACING_FRACTIONAL_EVEN);
266
267 info->properties[TGSI_PROPERTY_TES_SPACING] = (nir->info.tess.spacing + 1) % 3;
268 info->properties[TGSI_PROPERTY_TES_VERTEX_ORDER_CW] = !nir->info.tess.ccw;
269 info->properties[TGSI_PROPERTY_TES_POINT_MODE] = nir->info.tess.point_mode;
270 }
271
272 if (nir->info.stage == MESA_SHADER_GEOMETRY) {
273 info->properties[TGSI_PROPERTY_GS_INPUT_PRIM] = nir->info.gs.input_primitive;
274 info->properties[TGSI_PROPERTY_GS_OUTPUT_PRIM] = nir->info.gs.output_primitive;
275 info->properties[TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES] = nir->info.gs.vertices_out;
276 info->properties[TGSI_PROPERTY_GS_INVOCATIONS] = nir->info.gs.invocations;
277 }
278
279 if (nir->info.stage == MESA_SHADER_FRAGMENT) {
280 info->properties[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL] =
281 nir->info.fs.early_fragment_tests | nir->info.fs.post_depth_coverage;
282 info->properties[TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE] = nir->info.fs.post_depth_coverage;
283
284 if (nir->info.fs.depth_layout != FRAG_DEPTH_LAYOUT_NONE) {
285 switch (nir->info.fs.depth_layout) {
286 case FRAG_DEPTH_LAYOUT_ANY:
287 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_ANY;
288 break;
289 case FRAG_DEPTH_LAYOUT_GREATER:
290 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_GREATER;
291 break;
292 case FRAG_DEPTH_LAYOUT_LESS:
293 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_LESS;
294 break;
295 case FRAG_DEPTH_LAYOUT_UNCHANGED:
296 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_UNCHANGED;
297 break;
298 default:
299 unreachable("Unknow depth layout");
300 }
301 }
302 }
303
304 if (nir->info.stage == MESA_SHADER_COMPUTE) {
305 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] = nir->info.cs.local_size[0];
306 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT] = nir->info.cs.local_size[1];
307 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH] = nir->info.cs.local_size[2];
308 }
309
310 i = 0;
311 uint64_t processed_inputs = 0;
312 unsigned num_inputs = 0;
313 nir_foreach_variable(variable, &nir->inputs) {
314 unsigned semantic_name, semantic_index;
315
316 const struct glsl_type *type = variable->type;
317 if (nir_is_per_vertex_io(variable, nir->info.stage)) {
318 assert(glsl_type_is_array(type));
319 type = glsl_get_array_element(type);
320 }
321
322 unsigned attrib_count = glsl_count_attribute_slots(type,
323 nir->info.stage == MESA_SHADER_VERTEX);
324
325 i = variable->data.driver_location;
326
327 /* Vertex shader inputs don't have semantics. The state
328 * tracker has already mapped them to attributes via
329 * variable->data.driver_location.
330 */
331 if (nir->info.stage == MESA_SHADER_VERTEX) {
332 /* TODO: gather the actual input useage and remove this. */
333 info->input_usage_mask[i] = TGSI_WRITEMASK_XYZW;
334
335 if (glsl_type_is_dual_slot(variable->type)) {
336 num_inputs += 2;
337
338 /* TODO: gather the actual input useage and remove this. */
339 info->input_usage_mask[i+1] = TGSI_WRITEMASK_XYZW;
340 } else
341 num_inputs++;
342 continue;
343 }
344
345 /* Fragment shader position is a system value. */
346 if (nir->info.stage == MESA_SHADER_FRAGMENT &&
347 variable->data.location == VARYING_SLOT_POS) {
348 if (variable->data.pixel_center_integer)
349 info->properties[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER] =
350 TGSI_FS_COORD_PIXEL_CENTER_INTEGER;
351
352 num_inputs++;
353 continue;
354 }
355
356 for (unsigned j = 0; j < attrib_count; j++, i++) {
357
358 if (processed_inputs & ((uint64_t)1 << i))
359 continue;
360
361 processed_inputs |= ((uint64_t)1 << i);
362 num_inputs++;
363
364 tgsi_get_gl_varying_semantic(variable->data.location + j, true,
365 &semantic_name, &semantic_index);
366
367 info->input_semantic_name[i] = semantic_name;
368 info->input_semantic_index[i] = semantic_index;
369
370 if (semantic_name == TGSI_SEMANTIC_PRIMID)
371 info->uses_primid = true;
372
373 if (variable->data.sample)
374 info->input_interpolate_loc[i] = TGSI_INTERPOLATE_LOC_SAMPLE;
375 else if (variable->data.centroid)
376 info->input_interpolate_loc[i] = TGSI_INTERPOLATE_LOC_CENTROID;
377 else
378 info->input_interpolate_loc[i] = TGSI_INTERPOLATE_LOC_CENTER;
379
380 enum glsl_base_type base_type =
381 glsl_get_base_type(glsl_without_array(variable->type));
382
383 switch (variable->data.interpolation) {
384 case INTERP_MODE_NONE:
385 if (glsl_base_type_is_integer(base_type)) {
386 info->input_interpolate[i] = TGSI_INTERPOLATE_CONSTANT;
387 break;
388 }
389
390 if (semantic_name == TGSI_SEMANTIC_COLOR) {
391 info->input_interpolate[i] = TGSI_INTERPOLATE_COLOR;
392 break;
393 }
394 /* fall-through */
395
396 case INTERP_MODE_SMOOTH:
397 assert(!glsl_base_type_is_integer(base_type));
398
399 info->input_interpolate[i] = TGSI_INTERPOLATE_PERSPECTIVE;
400 break;
401
402 case INTERP_MODE_NOPERSPECTIVE:
403 assert(!glsl_base_type_is_integer(base_type));
404
405 info->input_interpolate[i] = TGSI_INTERPOLATE_LINEAR;
406 break;
407
408 case INTERP_MODE_FLAT:
409 info->input_interpolate[i] = TGSI_INTERPOLATE_CONSTANT;
410 break;
411 }
412
413 /* TODO make this more precise */
414 if (variable->data.location == VARYING_SLOT_COL0)
415 info->colors_read |= 0x0f;
416 else if (variable->data.location == VARYING_SLOT_COL1)
417 info->colors_read |= 0xf0;
418 }
419 }
420
421 info->num_inputs = num_inputs;
422
423
424 i = 0;
425 uint64_t processed_outputs = 0;
426 unsigned num_outputs = 0;
427 nir_foreach_variable(variable, &nir->outputs) {
428 unsigned semantic_name, semantic_index;
429
430 if (nir->info.stage == MESA_SHADER_FRAGMENT) {
431 tgsi_get_gl_frag_result_semantic(variable->data.location,
432 &semantic_name, &semantic_index);
433
434 /* Adjust for dual source blending */
435 if (variable->data.index > 0) {
436 semantic_index++;
437 }
438 } else {
439 tgsi_get_gl_varying_semantic(variable->data.location, true,
440 &semantic_name, &semantic_index);
441 }
442
443 i = variable->data.driver_location;
444 if (processed_outputs & ((uint64_t)1 << i))
445 continue;
446
447 processed_outputs |= ((uint64_t)1 << i);
448 num_outputs++;
449
450 info->output_semantic_name[i] = semantic_name;
451 info->output_semantic_index[i] = semantic_index;
452 info->output_usagemask[i] = TGSI_WRITEMASK_XYZW;
453
454 unsigned num_components = 4;
455 unsigned vector_elements = glsl_get_vector_elements(glsl_without_array(variable->type));
456 if (vector_elements)
457 num_components = vector_elements;
458
459 unsigned gs_out_streams;
460 if (variable->data.stream & (1u << 31)) {
461 gs_out_streams = variable->data.stream & ~(1u << 31);
462 } else {
463 assert(variable->data.stream < 4);
464 gs_out_streams = 0;
465 for (unsigned j = 0; j < num_components; ++j)
466 gs_out_streams |= variable->data.stream << (2 * (variable->data.location_frac + j));
467 }
468
469 unsigned streamx = gs_out_streams & 3;
470 unsigned streamy = (gs_out_streams >> 2) & 3;
471 unsigned streamz = (gs_out_streams >> 4) & 3;
472 unsigned streamw = (gs_out_streams >> 6) & 3;
473
474 if (info->output_usagemask[i] & TGSI_WRITEMASK_X) {
475 info->output_streams[i] |= streamx;
476 info->num_stream_output_components[streamx]++;
477 }
478 if (info->output_usagemask[i] & TGSI_WRITEMASK_Y) {
479 info->output_streams[i] |= streamy << 2;
480 info->num_stream_output_components[streamy]++;
481 }
482 if (info->output_usagemask[i] & TGSI_WRITEMASK_Z) {
483 info->output_streams[i] |= streamz << 4;
484 info->num_stream_output_components[streamz]++;
485 }
486 if (info->output_usagemask[i] & TGSI_WRITEMASK_W) {
487 info->output_streams[i] |= streamw << 6;
488 info->num_stream_output_components[streamw]++;
489 }
490
491 switch (semantic_name) {
492 case TGSI_SEMANTIC_PRIMID:
493 info->writes_primid = true;
494 break;
495 case TGSI_SEMANTIC_VIEWPORT_INDEX:
496 info->writes_viewport_index = true;
497 break;
498 case TGSI_SEMANTIC_LAYER:
499 info->writes_layer = true;
500 break;
501 case TGSI_SEMANTIC_PSIZE:
502 info->writes_psize = true;
503 break;
504 case TGSI_SEMANTIC_CLIPVERTEX:
505 info->writes_clipvertex = true;
506 break;
507 case TGSI_SEMANTIC_COLOR:
508 info->colors_written |= 1 << semantic_index;
509 break;
510 case TGSI_SEMANTIC_STENCIL:
511 info->writes_stencil = true;
512 break;
513 case TGSI_SEMANTIC_SAMPLEMASK:
514 info->writes_samplemask = true;
515 break;
516 case TGSI_SEMANTIC_EDGEFLAG:
517 info->writes_edgeflag = true;
518 break;
519 case TGSI_SEMANTIC_POSITION:
520 if (info->processor == PIPE_SHADER_FRAGMENT)
521 info->writes_z = true;
522 else
523 info->writes_position = true;
524 break;
525 }
526
527 if (nir->info.stage == MESA_SHADER_TESS_CTRL) {
528 switch (semantic_name) {
529 case TGSI_SEMANTIC_PATCH:
530 info->reads_perpatch_outputs = true;
531 break;
532 case TGSI_SEMANTIC_TESSINNER:
533 case TGSI_SEMANTIC_TESSOUTER:
534 info->reads_tessfactor_outputs = true;
535 break;
536 default:
537 info->reads_pervertex_outputs = true;
538 }
539 }
540
541 unsigned loc = variable->data.location;
542 if (loc == FRAG_RESULT_COLOR &&
543 nir->info.outputs_written & (1ull << loc)) {
544 info->properties[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS] = true;
545 }
546 }
547
548 info->num_outputs = num_outputs;
549
550 nir_foreach_variable(variable, &nir->uniforms) {
551 const struct glsl_type *type = variable->type;
552 enum glsl_base_type base_type =
553 glsl_get_base_type(glsl_without_array(type));
554 unsigned aoa_size = MAX2(1, glsl_get_aoa_size(type));
555
556 /* We rely on the fact that nir_lower_samplers_as_deref has
557 * eliminated struct dereferences.
558 */
559 if (base_type == GLSL_TYPE_SAMPLER)
560 info->samplers_declared |=
561 u_bit_consecutive(variable->data.binding, aoa_size);
562 else if (base_type == GLSL_TYPE_IMAGE)
563 info->images_declared |=
564 u_bit_consecutive(variable->data.binding, aoa_size);
565 }
566
567 info->num_written_clipdistance = nir->info.clip_distance_array_size;
568 info->num_written_culldistance = nir->info.cull_distance_array_size;
569 info->clipdist_writemask = u_bit_consecutive(0, info->num_written_clipdistance);
570 info->culldist_writemask = u_bit_consecutive(0, info->num_written_culldistance);
571
572 if (info->processor == PIPE_SHADER_FRAGMENT)
573 info->uses_kill = nir->info.fs.uses_discard;
574
575 /* TODO make this more accurate */
576 info->const_buffers_declared = u_bit_consecutive(0, SI_NUM_CONST_BUFFERS);
577 info->shader_buffers_declared = u_bit_consecutive(0, SI_NUM_SHADER_BUFFERS);
578
579 func = (struct nir_function *)exec_list_get_head_const(&nir->functions);
580 nir_foreach_block(block, func->impl) {
581 nir_foreach_instr(instr, block)
582 scan_instruction(info, instr);
583 }
584 }
585
586 /**
587 * Perform "lowering" operations on the NIR that are run once when the shader
588 * selector is created.
589 */
590 void
591 si_lower_nir(struct si_shader_selector* sel)
592 {
593 /* Adjust the driver location of inputs and outputs. The state tracker
594 * interprets them as slots, while the ac/nir backend interprets them
595 * as individual components.
596 */
597 nir_foreach_variable(variable, &sel->nir->inputs)
598 variable->data.driver_location *= 4;
599
600 nir_foreach_variable(variable, &sel->nir->outputs) {
601 variable->data.driver_location *= 4;
602
603 if (sel->nir->info.stage == MESA_SHADER_FRAGMENT) {
604 if (variable->data.location == FRAG_RESULT_DEPTH)
605 variable->data.driver_location += 2;
606 else if (variable->data.location == FRAG_RESULT_STENCIL)
607 variable->data.driver_location += 1;
608 }
609 }
610
611 /* Perform lowerings (and optimizations) of code.
612 *
613 * Performance considerations aside, we must:
614 * - lower certain ALU operations
615 * - ensure constant offsets for texture instructions are folded
616 * and copy-propagated
617 */
618 NIR_PASS_V(sel->nir, nir_lower_io, nir_var_uniform, type_size,
619 (nir_lower_io_options)0);
620 NIR_PASS_V(sel->nir, nir_lower_uniforms_to_ubo);
621
622 NIR_PASS_V(sel->nir, nir_lower_returns);
623 NIR_PASS_V(sel->nir, nir_lower_vars_to_ssa);
624 NIR_PASS_V(sel->nir, nir_lower_alu_to_scalar);
625 NIR_PASS_V(sel->nir, nir_lower_phis_to_scalar);
626
627 static const struct nir_lower_tex_options lower_tex_options = {
628 .lower_txp = ~0u,
629 };
630 NIR_PASS_V(sel->nir, nir_lower_tex, &lower_tex_options);
631
632 const nir_lower_subgroups_options subgroups_options = {
633 .subgroup_size = 64,
634 .ballot_bit_size = 64,
635 .lower_to_scalar = true,
636 .lower_subgroup_masks = true,
637 .lower_vote_trivial = false,
638 };
639 NIR_PASS_V(sel->nir, nir_lower_subgroups, &subgroups_options);
640
641 bool progress;
642 do {
643 progress = false;
644
645 /* (Constant) copy propagation is needed for txf with offsets. */
646 NIR_PASS(progress, sel->nir, nir_copy_prop);
647 NIR_PASS(progress, sel->nir, nir_opt_remove_phis);
648 NIR_PASS(progress, sel->nir, nir_opt_dce);
649 if (nir_opt_trivial_continues(sel->nir)) {
650 progress = true;
651 NIR_PASS(progress, sel->nir, nir_copy_prop);
652 NIR_PASS(progress, sel->nir, nir_opt_dce);
653 }
654 NIR_PASS(progress, sel->nir, nir_opt_if);
655 NIR_PASS(progress, sel->nir, nir_opt_dead_cf);
656 NIR_PASS(progress, sel->nir, nir_opt_cse);
657 NIR_PASS(progress, sel->nir, nir_opt_peephole_select, 8);
658
659 /* Needed for algebraic lowering */
660 NIR_PASS(progress, sel->nir, nir_opt_algebraic);
661 NIR_PASS(progress, sel->nir, nir_opt_constant_folding);
662
663 NIR_PASS(progress, sel->nir, nir_opt_undef);
664 NIR_PASS(progress, sel->nir, nir_opt_conditional_discard);
665 if (sel->nir->options->max_unroll_iterations) {
666 NIR_PASS(progress, sel->nir, nir_opt_loop_unroll, 0);
667 }
668 } while (progress);
669 }
670
671 static void declare_nir_input_vs(struct si_shader_context *ctx,
672 struct nir_variable *variable,
673 unsigned input_index,
674 LLVMValueRef out[4])
675 {
676 si_llvm_load_input_vs(ctx, input_index, out);
677 }
678
679 static void declare_nir_input_fs(struct si_shader_context *ctx,
680 struct nir_variable *variable,
681 unsigned input_index,
682 LLVMValueRef out[4])
683 {
684 unsigned slot = variable->data.location;
685 if (slot == VARYING_SLOT_POS) {
686 out[0] = LLVMGetParam(ctx->main_fn, SI_PARAM_POS_X_FLOAT);
687 out[1] = LLVMGetParam(ctx->main_fn, SI_PARAM_POS_Y_FLOAT);
688 out[2] = LLVMGetParam(ctx->main_fn, SI_PARAM_POS_Z_FLOAT);
689 out[3] = ac_build_fdiv(&ctx->ac, ctx->ac.f32_1,
690 LLVMGetParam(ctx->main_fn, SI_PARAM_POS_W_FLOAT));
691 return;
692 }
693
694 si_llvm_load_input_fs(ctx, input_index, out);
695 }
696
697 LLVMValueRef si_nir_load_input_gs(struct ac_shader_abi *abi,
698 unsigned location,
699 unsigned driver_location,
700 unsigned component,
701 unsigned num_components,
702 unsigned vertex_index,
703 unsigned const_index,
704 LLVMTypeRef type)
705 {
706 struct si_shader_context *ctx = si_shader_context_from_abi(abi);
707
708 LLVMValueRef value[4];
709 for (unsigned i = component; i < num_components + component; i++) {
710 value[i] = si_llvm_load_input_gs(&ctx->abi, driver_location / 4,
711 vertex_index, type, i);
712 }
713
714 return ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
715 }
716
717 LLVMValueRef
718 si_nir_lookup_interp_param(struct ac_shader_abi *abi,
719 enum glsl_interp_mode interp, unsigned location)
720 {
721 struct si_shader_context *ctx = si_shader_context_from_abi(abi);
722 int interp_param_idx = -1;
723
724 switch (interp) {
725 case INTERP_MODE_FLAT:
726 return NULL;
727 case INTERP_MODE_SMOOTH:
728 case INTERP_MODE_NONE:
729 if (location == INTERP_CENTER)
730 interp_param_idx = SI_PARAM_PERSP_CENTER;
731 else if (location == INTERP_CENTROID)
732 interp_param_idx = SI_PARAM_PERSP_CENTROID;
733 else if (location == INTERP_SAMPLE)
734 interp_param_idx = SI_PARAM_PERSP_SAMPLE;
735 break;
736 case INTERP_MODE_NOPERSPECTIVE:
737 if (location == INTERP_CENTER)
738 interp_param_idx = SI_PARAM_LINEAR_CENTER;
739 else if (location == INTERP_CENTROID)
740 interp_param_idx = SI_PARAM_LINEAR_CENTROID;
741 else if (location == INTERP_SAMPLE)
742 interp_param_idx = SI_PARAM_LINEAR_SAMPLE;
743 break;
744 default:
745 assert(!"Unhandled interpolation mode.");
746 return NULL;
747 }
748
749 return interp_param_idx != -1 ?
750 LLVMGetParam(ctx->main_fn, interp_param_idx) : NULL;
751 }
752
753 static LLVMValueRef
754 si_nir_load_sampler_desc(struct ac_shader_abi *abi,
755 unsigned descriptor_set, unsigned base_index,
756 unsigned constant_index, LLVMValueRef dynamic_index,
757 enum ac_descriptor_type desc_type, bool image,
758 bool write)
759 {
760 struct si_shader_context *ctx = si_shader_context_from_abi(abi);
761 LLVMBuilderRef builder = ctx->ac.builder;
762 LLVMValueRef list = LLVMGetParam(ctx->main_fn, ctx->param_samplers_and_images);
763 LLVMValueRef index = dynamic_index;
764
765 assert(!descriptor_set);
766
767 if (!index)
768 index = ctx->ac.i32_0;
769
770 index = LLVMBuildAdd(builder, index,
771 LLVMConstInt(ctx->ac.i32, base_index + constant_index, false),
772 "");
773
774 if (image) {
775 assert(desc_type == AC_DESC_IMAGE || desc_type == AC_DESC_BUFFER);
776 assert(base_index + constant_index < ctx->num_images);
777
778 if (dynamic_index)
779 index = si_llvm_bound_index(ctx, index, ctx->num_images);
780
781 index = LLVMBuildSub(ctx->gallivm.builder,
782 LLVMConstInt(ctx->i32, SI_NUM_IMAGES - 1, 0),
783 index, "");
784
785 /* TODO: be smarter about when we use dcc_off */
786 return si_load_image_desc(ctx, list, index, desc_type, write);
787 }
788
789 assert(base_index + constant_index < ctx->num_samplers);
790
791 if (dynamic_index)
792 index = si_llvm_bound_index(ctx, index, ctx->num_samplers);
793
794 index = LLVMBuildAdd(ctx->gallivm.builder, index,
795 LLVMConstInt(ctx->i32, SI_NUM_IMAGES / 2, 0), "");
796
797 return si_load_sampler_desc(ctx, list, index, desc_type);
798 }
799
800 static void bitcast_inputs(struct si_shader_context *ctx,
801 LLVMValueRef data[4],
802 unsigned input_idx)
803 {
804 for (unsigned chan = 0; chan < 4; chan++) {
805 ctx->inputs[input_idx + chan] =
806 LLVMBuildBitCast(ctx->ac.builder, data[chan], ctx->ac.i32, "");
807 }
808 }
809
810 bool si_nir_build_llvm(struct si_shader_context *ctx, struct nir_shader *nir)
811 {
812 struct tgsi_shader_info *info = &ctx->shader->selector->info;
813
814 if (nir->info.stage == MESA_SHADER_VERTEX ||
815 nir->info.stage == MESA_SHADER_FRAGMENT) {
816 uint64_t processed_inputs = 0;
817 nir_foreach_variable(variable, &nir->inputs) {
818 unsigned attrib_count = glsl_count_attribute_slots(variable->type,
819 nir->info.stage == MESA_SHADER_VERTEX);
820 unsigned input_idx = variable->data.driver_location;
821
822 LLVMValueRef data[4];
823 unsigned loc = variable->data.location;
824
825 for (unsigned i = 0; i < attrib_count; i++) {
826 /* Packed components share the same location so skip
827 * them if we have already processed the location.
828 */
829 if (processed_inputs & ((uint64_t)1 << loc)) {
830 input_idx += 4;
831 continue;
832 }
833
834 if (nir->info.stage == MESA_SHADER_VERTEX) {
835 declare_nir_input_vs(ctx, variable, input_idx / 4, data);
836 bitcast_inputs(ctx, data, input_idx);
837 if (glsl_type_is_dual_slot(variable->type)) {
838 input_idx += 4;
839 declare_nir_input_vs(ctx, variable, input_idx / 4, data);
840 bitcast_inputs(ctx, data, input_idx);
841 }
842 } else if (nir->info.stage == MESA_SHADER_FRAGMENT) {
843 declare_nir_input_fs(ctx, variable, input_idx / 4, data);
844 bitcast_inputs(ctx, data, input_idx);
845 }
846
847 processed_inputs |= ((uint64_t)1 << loc);
848 loc++;
849 input_idx += 4;
850 }
851 }
852 }
853
854 ctx->abi.inputs = &ctx->inputs[0];
855 ctx->abi.load_sampler_desc = si_nir_load_sampler_desc;
856 ctx->abi.clamp_shadow_reference = true;
857
858 ctx->num_samplers = util_last_bit(info->samplers_declared);
859 ctx->num_images = util_last_bit(info->images_declared);
860
861 if (ctx->shader->selector->local_size) {
862 assert(nir->info.stage == MESA_SHADER_COMPUTE);
863 si_declare_compute_memory(ctx);
864 }
865 ac_nir_translate(&ctx->ac, &ctx->abi, nir);
866
867 return true;
868 }