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[mesa.git] / src / gallium / drivers / radeonsi / si_shader_nir.c
1 /*
2 * Copyright 2017 Advanced Micro Devices, Inc.
3 * All Rights Reserved.
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
25 #include "ac_nir_to_llvm.h"
26 #include "compiler/nir/nir.h"
27 #include "compiler/nir/nir_builder.h"
28 #include "compiler/nir/nir_deref.h"
29 #include "compiler/nir_types.h"
30 #include "si_pipe.h"
31 #include "si_shader_internal.h"
32 #include "tgsi/tgsi_from_mesa.h"
33
34 static const nir_deref_instr *tex_get_texture_deref(nir_tex_instr *instr)
35 {
36 for (unsigned i = 0; i < instr->num_srcs; i++) {
37 switch (instr->src[i].src_type) {
38 case nir_tex_src_texture_deref:
39 return nir_src_as_deref(instr->src[i].src);
40 default:
41 break;
42 }
43 }
44
45 return NULL;
46 }
47
48 static void scan_io_usage(struct si_shader_info *info, nir_intrinsic_instr *intr,
49 bool is_input)
50 {
51 unsigned interp = INTERP_MODE_FLAT; /* load_input uses flat shading */
52
53 if (intr->intrinsic == nir_intrinsic_load_interpolated_input) {
54 nir_intrinsic_instr *baryc = nir_instr_as_intrinsic(intr->src[0].ssa->parent_instr);
55
56 if (baryc) {
57 if (nir_intrinsic_infos[baryc->intrinsic].index_map[NIR_INTRINSIC_INTERP_MODE] > 0)
58 interp = nir_intrinsic_interp_mode(baryc);
59 else
60 unreachable("unknown barycentric intrinsic");
61 } else {
62 unreachable("unknown barycentric expression");
63 }
64 }
65
66 unsigned mask, bit_size;
67 bool dual_slot, is_output_load;
68
69 if (nir_intrinsic_infos[intr->intrinsic].index_map[NIR_INTRINSIC_WRMASK] > 0) {
70 mask = nir_intrinsic_write_mask(intr); /* store */
71 bit_size = nir_src_bit_size(intr->src[0]);
72 dual_slot = bit_size == 64 && nir_src_num_components(intr->src[0]) >= 3;
73 is_output_load = false;
74 } else {
75 mask = nir_ssa_def_components_read(&intr->dest.ssa); /* load */
76 bit_size = intr->dest.ssa.bit_size;
77 dual_slot = bit_size == 64 && intr->dest.ssa.num_components >= 3;
78 is_output_load = !is_input;
79 }
80
81 /* Convert the 64-bit component mask to a 32-bit component mask. */
82 if (bit_size == 64) {
83 unsigned new_mask = 0;
84 for (unsigned i = 0; i < 4; i++) {
85 if (mask & (1 << i))
86 new_mask |= 0x3 << (2 * i);
87 }
88 mask = new_mask;
89 }
90
91 /* Convert the 16-bit component mask to a 32-bit component mask. */
92 if (bit_size == 16) {
93 unsigned new_mask = 0;
94 for (unsigned i = 0; i < 4; i++) {
95 if (mask & (1 << i))
96 new_mask |= 0x1 << (i / 2);
97 }
98 mask = new_mask;
99 }
100
101 mask <<= nir_intrinsic_component(intr);
102
103 unsigned name, index;
104 if (info->stage == MESA_SHADER_VERTEX && is_input) {
105 /* VS doesn't have semantics. */
106 name = 0;
107 index = 0;
108 } else if (info->stage == MESA_SHADER_FRAGMENT && !is_input) {
109 tgsi_get_gl_frag_result_semantic(nir_intrinsic_io_semantics(intr).location,
110 &name, &index);
111 /* Adjust for dual source blending. */
112 if (nir_intrinsic_io_semantics(intr).dual_source_blend_index)
113 index++;
114 } else {
115 tgsi_get_gl_varying_semantic(nir_intrinsic_io_semantics(intr).location,
116 true, &name, &index);
117 }
118
119 nir_src offset = *nir_get_io_offset_src(intr);
120 bool indirect = !nir_src_is_const(offset);
121 if (!indirect)
122 assert(nir_src_as_uint(offset) == 0);
123
124 unsigned driver_location = nir_intrinsic_base(intr);
125 unsigned num_slots = indirect ? nir_intrinsic_io_semantics(intr).num_slots : (1 + dual_slot);
126
127 if (is_input) {
128 assert(driver_location + num_slots <= ARRAY_SIZE(info->input_usage_mask));
129
130 for (unsigned i = 0; i < num_slots; i++) {
131 unsigned loc = driver_location + i;
132 unsigned slot_mask = (dual_slot && i % 2 ? mask >> 4 : mask) & 0xf;
133
134 info->input_semantic_name[loc] = name;
135 info->input_semantic_index[loc] = index + i;
136 info->input_interpolate[loc] = interp;
137
138 if (slot_mask) {
139 info->input_usage_mask[loc] |= slot_mask;
140 info->num_inputs = MAX2(info->num_inputs, loc + 1);
141
142 if (name == TGSI_SEMANTIC_PRIMID)
143 info->uses_primid = true;
144 }
145 }
146 } else {
147 /* Outputs. */
148 assert(driver_location + num_slots <= ARRAY_SIZE(info->output_usagemask));
149
150 for (unsigned i = 0; i < num_slots; i++) {
151 unsigned loc = driver_location + i;
152 unsigned slot_mask = (dual_slot && i % 2 ? mask >> 4 : mask) & 0xf;
153
154 info->output_semantic_name[loc] = name;
155 info->output_semantic_index[loc] = index + i;
156
157 if (is_output_load) {
158 /* Output loads have only a few things that we need to track. */
159 info->output_readmask[loc] |= slot_mask;
160
161 if (info->stage == MESA_SHADER_FRAGMENT &&
162 nir_intrinsic_io_semantics(intr).fb_fetch_output)
163 info->uses_fbfetch = true;
164 } else if (slot_mask) {
165 /* Output stores. */
166 if (info->stage == MESA_SHADER_GEOMETRY) {
167 unsigned gs_streams = (uint32_t)nir_intrinsic_io_semantics(intr).gs_streams <<
168 (nir_intrinsic_component(intr) * 2);
169 unsigned new_mask = slot_mask & ~info->output_usagemask[loc];
170
171 for (unsigned i = 0; i < 4; i++) {
172 unsigned stream = (gs_streams >> (i * 2)) & 0x3;
173
174 if (new_mask & (1 << i)) {
175 info->output_streams[loc] |= stream << (i * 2);
176 info->num_stream_output_components[stream]++;
177 }
178 }
179 }
180
181 info->output_usagemask[loc] |= slot_mask;
182 info->num_outputs = MAX2(info->num_outputs, loc + 1);
183
184 switch (name) {
185 case TGSI_SEMANTIC_PRIMID:
186 info->writes_primid = true;
187 break;
188 case TGSI_SEMANTIC_VIEWPORT_INDEX:
189 info->writes_viewport_index = true;
190 break;
191 case TGSI_SEMANTIC_LAYER:
192 info->writes_layer = true;
193 break;
194 case TGSI_SEMANTIC_PSIZE:
195 info->writes_psize = true;
196 break;
197 case TGSI_SEMANTIC_CLIPVERTEX:
198 info->writes_clipvertex = true;
199 break;
200 case TGSI_SEMANTIC_COLOR:
201 info->colors_written |= 1 << (index + i);
202
203 if (info->stage == MESA_SHADER_FRAGMENT &&
204 nir_intrinsic_io_semantics(intr).location == FRAG_RESULT_COLOR)
205 info->properties[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS] = true;
206 break;
207 case TGSI_SEMANTIC_STENCIL:
208 info->writes_stencil = true;
209 break;
210 case TGSI_SEMANTIC_SAMPLEMASK:
211 info->writes_samplemask = true;
212 break;
213 case TGSI_SEMANTIC_EDGEFLAG:
214 info->writes_edgeflag = true;
215 break;
216 case TGSI_SEMANTIC_POSITION:
217 if (info->stage == MESA_SHADER_FRAGMENT)
218 info->writes_z = true;
219 else
220 info->writes_position = true;
221 break;
222 }
223 }
224 }
225 }
226 }
227
228 static void scan_instruction(const struct nir_shader *nir, struct si_shader_info *info,
229 nir_instr *instr)
230 {
231 if (instr->type == nir_instr_type_alu) {
232 nir_alu_instr *alu = nir_instr_as_alu(instr);
233
234 switch (alu->op) {
235 case nir_op_fddx:
236 case nir_op_fddy:
237 case nir_op_fddx_fine:
238 case nir_op_fddy_fine:
239 case nir_op_fddx_coarse:
240 case nir_op_fddy_coarse:
241 info->uses_derivatives = true;
242 break;
243 default:
244 break;
245 }
246 } else if (instr->type == nir_instr_type_tex) {
247 nir_tex_instr *tex = nir_instr_as_tex(instr);
248 const nir_deref_instr *deref = tex_get_texture_deref(tex);
249 nir_variable *var = deref ? nir_deref_instr_get_variable(deref) : NULL;
250
251 if (!var) {
252 info->samplers_declared |= u_bit_consecutive(tex->sampler_index, 1);
253 } else {
254 if (deref->mode != nir_var_uniform || var->data.bindless)
255 info->uses_bindless_samplers = true;
256 }
257
258 switch (tex->op) {
259 case nir_texop_tex:
260 case nir_texop_txb:
261 case nir_texop_lod:
262 info->uses_derivatives = true;
263 break;
264 default:
265 break;
266 }
267 } else if (instr->type == nir_instr_type_intrinsic) {
268 nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
269
270 switch (intr->intrinsic) {
271 case nir_intrinsic_load_front_face:
272 info->uses_frontface = 1;
273 break;
274 case nir_intrinsic_load_instance_id:
275 info->uses_instanceid = 1;
276 break;
277 case nir_intrinsic_load_invocation_id:
278 info->uses_invocationid = true;
279 break;
280 case nir_intrinsic_load_num_work_groups:
281 info->uses_grid_size = true;
282 break;
283 case nir_intrinsic_load_local_invocation_index:
284 case nir_intrinsic_load_subgroup_id:
285 case nir_intrinsic_load_num_subgroups:
286 info->uses_subgroup_info = true;
287 break;
288 case nir_intrinsic_load_local_group_size:
289 /* The block size is translated to IMM with a fixed block size. */
290 if (info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] == 0)
291 info->uses_block_size = true;
292 break;
293 case nir_intrinsic_load_local_invocation_id:
294 case nir_intrinsic_load_work_group_id: {
295 unsigned mask = nir_ssa_def_components_read(&intr->dest.ssa);
296 while (mask) {
297 unsigned i = u_bit_scan(&mask);
298
299 if (intr->intrinsic == nir_intrinsic_load_work_group_id)
300 info->uses_block_id[i] = true;
301 else
302 info->uses_thread_id[i] = true;
303 }
304 break;
305 }
306 case nir_intrinsic_load_vertex_id:
307 info->uses_vertexid = 1;
308 break;
309 case nir_intrinsic_load_vertex_id_zero_base:
310 info->uses_vertexid_nobase = 1;
311 break;
312 case nir_intrinsic_load_base_vertex:
313 info->uses_basevertex = 1;
314 break;
315 case nir_intrinsic_load_draw_id:
316 info->uses_drawid = 1;
317 break;
318 case nir_intrinsic_load_primitive_id:
319 info->uses_primid = 1;
320 break;
321 case nir_intrinsic_load_sample_mask_in:
322 info->reads_samplemask = true;
323 break;
324 case nir_intrinsic_load_tess_level_inner:
325 case nir_intrinsic_load_tess_level_outer:
326 info->reads_tess_factors = true;
327 break;
328 case nir_intrinsic_bindless_image_load:
329 case nir_intrinsic_bindless_image_size:
330 case nir_intrinsic_bindless_image_samples:
331 info->uses_bindless_images = true;
332 break;
333 case nir_intrinsic_bindless_image_store:
334 info->uses_bindless_images = true;
335 info->writes_memory = true;
336 info->num_memory_instructions++; /* we only care about stores */
337 break;
338 case nir_intrinsic_image_deref_store:
339 info->writes_memory = true;
340 info->num_memory_instructions++; /* we only care about stores */
341 break;
342 case nir_intrinsic_bindless_image_atomic_add:
343 case nir_intrinsic_bindless_image_atomic_imin:
344 case nir_intrinsic_bindless_image_atomic_umin:
345 case nir_intrinsic_bindless_image_atomic_imax:
346 case nir_intrinsic_bindless_image_atomic_umax:
347 case nir_intrinsic_bindless_image_atomic_and:
348 case nir_intrinsic_bindless_image_atomic_or:
349 case nir_intrinsic_bindless_image_atomic_xor:
350 case nir_intrinsic_bindless_image_atomic_exchange:
351 case nir_intrinsic_bindless_image_atomic_comp_swap:
352 info->uses_bindless_images = true;
353 info->writes_memory = true;
354 info->num_memory_instructions++; /* we only care about stores */
355 break;
356 case nir_intrinsic_image_deref_atomic_add:
357 case nir_intrinsic_image_deref_atomic_imin:
358 case nir_intrinsic_image_deref_atomic_umin:
359 case nir_intrinsic_image_deref_atomic_imax:
360 case nir_intrinsic_image_deref_atomic_umax:
361 case nir_intrinsic_image_deref_atomic_and:
362 case nir_intrinsic_image_deref_atomic_or:
363 case nir_intrinsic_image_deref_atomic_xor:
364 case nir_intrinsic_image_deref_atomic_exchange:
365 case nir_intrinsic_image_deref_atomic_comp_swap:
366 case nir_intrinsic_image_deref_atomic_inc_wrap:
367 case nir_intrinsic_image_deref_atomic_dec_wrap:
368 info->writes_memory = true;
369 info->num_memory_instructions++; /* we only care about stores */
370 break;
371 case nir_intrinsic_store_ssbo:
372 case nir_intrinsic_ssbo_atomic_add:
373 case nir_intrinsic_ssbo_atomic_imin:
374 case nir_intrinsic_ssbo_atomic_umin:
375 case nir_intrinsic_ssbo_atomic_imax:
376 case nir_intrinsic_ssbo_atomic_umax:
377 case nir_intrinsic_ssbo_atomic_and:
378 case nir_intrinsic_ssbo_atomic_or:
379 case nir_intrinsic_ssbo_atomic_xor:
380 case nir_intrinsic_ssbo_atomic_exchange:
381 case nir_intrinsic_ssbo_atomic_comp_swap:
382 info->writes_memory = true;
383 info->num_memory_instructions++; /* we only care about stores */
384 break;
385 case nir_intrinsic_load_color0:
386 case nir_intrinsic_load_color1: {
387 unsigned index = intr->intrinsic == nir_intrinsic_load_color1;
388 uint8_t mask = nir_ssa_def_components_read(&intr->dest.ssa);
389 info->colors_read |= mask << (index * 4);
390 break;
391 }
392 case nir_intrinsic_load_barycentric_pixel:
393 case nir_intrinsic_load_barycentric_centroid:
394 case nir_intrinsic_load_barycentric_sample:
395 case nir_intrinsic_load_barycentric_at_offset: /* uses center */
396 case nir_intrinsic_load_barycentric_at_sample: { /* uses center */
397 unsigned mode = nir_intrinsic_interp_mode(intr);
398
399 if (mode == INTERP_MODE_FLAT)
400 break;
401
402 if (mode == INTERP_MODE_NOPERSPECTIVE) {
403 if (intr->intrinsic == nir_intrinsic_load_barycentric_sample)
404 info->uses_linear_sample = true;
405 else if (intr->intrinsic == nir_intrinsic_load_barycentric_centroid)
406 info->uses_linear_centroid = true;
407 else
408 info->uses_linear_center = true;
409
410 if (intr->intrinsic == nir_intrinsic_load_barycentric_at_sample)
411 info->uses_linear_opcode_interp_sample = true;
412 } else {
413 if (intr->intrinsic == nir_intrinsic_load_barycentric_sample)
414 info->uses_persp_sample = true;
415 else if (intr->intrinsic == nir_intrinsic_load_barycentric_centroid)
416 info->uses_persp_centroid = true;
417 else
418 info->uses_persp_center = true;
419
420 if (intr->intrinsic == nir_intrinsic_load_barycentric_at_sample)
421 info->uses_persp_opcode_interp_sample = true;
422 }
423 break;
424 }
425 case nir_intrinsic_load_input:
426 case nir_intrinsic_load_per_vertex_input:
427 case nir_intrinsic_load_input_vertex:
428 case nir_intrinsic_load_interpolated_input:
429 scan_io_usage(info, intr, true);
430 break;
431 case nir_intrinsic_load_output:
432 case nir_intrinsic_load_per_vertex_output:
433 case nir_intrinsic_store_output:
434 case nir_intrinsic_store_per_vertex_output:
435 scan_io_usage(info, intr, false);
436 break;
437 case nir_intrinsic_load_deref:
438 case nir_intrinsic_store_deref:
439 case nir_intrinsic_interp_deref_at_centroid:
440 case nir_intrinsic_interp_deref_at_sample:
441 case nir_intrinsic_interp_deref_at_offset:
442 unreachable("these opcodes should have been lowered");
443 break;
444 default:
445 break;
446 }
447 }
448 }
449
450 void si_nir_scan_shader(const struct nir_shader *nir, struct si_shader_info *info)
451 {
452 nir_function *func;
453
454 info->stage = nir->info.stage;
455 info->properties[TGSI_PROPERTY_NEXT_SHADER] = pipe_shader_type_from_mesa(nir->info.next_stage);
456
457 if (nir->info.stage == MESA_SHADER_VERTEX) {
458 info->properties[TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION] = nir->info.vs.window_space_position;
459 info->properties[TGSI_PROPERTY_VS_BLIT_SGPRS_AMD] = nir->info.vs.blit_sgprs_amd;
460 }
461
462 if (nir->info.stage == MESA_SHADER_TESS_CTRL) {
463 info->properties[TGSI_PROPERTY_TCS_VERTICES_OUT] = nir->info.tess.tcs_vertices_out;
464 }
465
466 if (nir->info.stage == MESA_SHADER_TESS_EVAL) {
467 if (nir->info.tess.primitive_mode == GL_ISOLINES)
468 info->properties[TGSI_PROPERTY_TES_PRIM_MODE] = PIPE_PRIM_LINES;
469 else
470 info->properties[TGSI_PROPERTY_TES_PRIM_MODE] = nir->info.tess.primitive_mode;
471
472 STATIC_ASSERT((TESS_SPACING_EQUAL + 1) % 3 == PIPE_TESS_SPACING_EQUAL);
473 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_ODD + 1) % 3 == PIPE_TESS_SPACING_FRACTIONAL_ODD);
474 STATIC_ASSERT((TESS_SPACING_FRACTIONAL_EVEN + 1) % 3 == PIPE_TESS_SPACING_FRACTIONAL_EVEN);
475
476 info->properties[TGSI_PROPERTY_TES_SPACING] = (nir->info.tess.spacing + 1) % 3;
477 info->properties[TGSI_PROPERTY_TES_VERTEX_ORDER_CW] = !nir->info.tess.ccw;
478 info->properties[TGSI_PROPERTY_TES_POINT_MODE] = nir->info.tess.point_mode;
479 }
480
481 if (nir->info.stage == MESA_SHADER_GEOMETRY) {
482 info->properties[TGSI_PROPERTY_GS_INPUT_PRIM] = nir->info.gs.input_primitive;
483 info->properties[TGSI_PROPERTY_GS_OUTPUT_PRIM] = nir->info.gs.output_primitive;
484 info->properties[TGSI_PROPERTY_GS_MAX_OUTPUT_VERTICES] = nir->info.gs.vertices_out;
485 info->properties[TGSI_PROPERTY_GS_INVOCATIONS] = nir->info.gs.invocations;
486 }
487
488 if (nir->info.stage == MESA_SHADER_FRAGMENT) {
489 info->properties[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL] =
490 nir->info.fs.early_fragment_tests | nir->info.fs.post_depth_coverage;
491 info->properties[TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE] = nir->info.fs.post_depth_coverage;
492
493 if (nir->info.fs.pixel_center_integer) {
494 info->properties[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER] = TGSI_FS_COORD_PIXEL_CENTER_INTEGER;
495 }
496
497 if (nir->info.fs.depth_layout != FRAG_DEPTH_LAYOUT_NONE) {
498 switch (nir->info.fs.depth_layout) {
499 case FRAG_DEPTH_LAYOUT_ANY:
500 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_ANY;
501 break;
502 case FRAG_DEPTH_LAYOUT_GREATER:
503 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_GREATER;
504 break;
505 case FRAG_DEPTH_LAYOUT_LESS:
506 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_LESS;
507 break;
508 case FRAG_DEPTH_LAYOUT_UNCHANGED:
509 info->properties[TGSI_PROPERTY_FS_DEPTH_LAYOUT] = TGSI_FS_DEPTH_LAYOUT_UNCHANGED;
510 break;
511 default:
512 unreachable("Unknow depth layout");
513 }
514 }
515
516 info->color_interpolate[0] = nir->info.fs.color0_interp;
517 info->color_interpolate[1] = nir->info.fs.color1_interp;
518 for (unsigned i = 0; i < 2; i++) {
519 if (info->color_interpolate[i] == INTERP_MODE_NONE)
520 info->color_interpolate[i] = INTERP_MODE_COLOR;
521 }
522
523 info->color_interpolate_loc[0] = nir->info.fs.color0_sample ? TGSI_INTERPOLATE_LOC_SAMPLE :
524 nir->info.fs.color0_centroid ? TGSI_INTERPOLATE_LOC_CENTROID :
525 TGSI_INTERPOLATE_LOC_CENTER;
526 info->color_interpolate_loc[1] = nir->info.fs.color1_sample ? TGSI_INTERPOLATE_LOC_SAMPLE :
527 nir->info.fs.color1_centroid ? TGSI_INTERPOLATE_LOC_CENTROID :
528 TGSI_INTERPOLATE_LOC_CENTER;
529 }
530
531 if (gl_shader_stage_is_compute(nir->info.stage)) {
532 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] = nir->info.cs.local_size[0];
533 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT] = nir->info.cs.local_size[1];
534 info->properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH] = nir->info.cs.local_size[2];
535 info->properties[TGSI_PROPERTY_CS_USER_DATA_COMPONENTS_AMD] =
536 nir->info.cs.user_data_components_amd;
537 }
538
539 info->constbuf0_num_slots = nir->num_uniforms;
540 info->shader_buffers_declared = u_bit_consecutive(0, nir->info.num_ssbos);
541 info->const_buffers_declared = u_bit_consecutive(0, nir->info.num_ubos);
542 info->images_declared = u_bit_consecutive(0, nir->info.num_images);
543 info->msaa_images_declared = nir->info.msaa_images;
544 info->image_buffers = nir->info.image_buffers;
545 info->samplers_declared = nir->info.textures_used;
546
547 info->num_written_clipdistance = nir->info.clip_distance_array_size;
548 info->num_written_culldistance = nir->info.cull_distance_array_size;
549 info->clipdist_writemask = u_bit_consecutive(0, info->num_written_clipdistance);
550 info->culldist_writemask = u_bit_consecutive(0, info->num_written_culldistance);
551
552 if (info->stage == MESA_SHADER_FRAGMENT)
553 info->uses_kill = nir->info.fs.uses_discard;
554
555 if (nir->info.stage == MESA_SHADER_TESS_CTRL) {
556 info->tessfactors_are_def_in_all_invocs = ac_are_tessfactors_def_in_all_invocs(nir);
557 }
558
559 func = (struct nir_function *)exec_list_get_head_const(&nir->functions);
560 nir_foreach_block (block, func->impl) {
561 nir_foreach_instr (instr, block)
562 scan_instruction(nir, info, instr);
563 }
564
565 /* Add color inputs to the list of inputs. */
566 if (nir->info.stage == MESA_SHADER_FRAGMENT) {
567 for (unsigned i = 0; i < 2; i++) {
568 if ((info->colors_read >> (i * 4)) & 0xf) {
569 info->input_semantic_name[info->num_inputs] = TGSI_SEMANTIC_COLOR;
570 info->input_semantic_index[info->num_inputs] = i;
571 info->input_interpolate[info->num_inputs] = info->color_interpolate[i];
572 info->input_usage_mask[info->num_inputs] = info->colors_read >> (i * 4);
573 info->num_inputs++;
574 }
575 }
576 }
577
578 /* Trim output read masks based on write masks. */
579 for (unsigned i = 0; i < info->num_outputs; i++)
580 info->output_readmask[i] &= info->output_usagemask[i];
581 }
582
583 static void si_nir_opts(struct nir_shader *nir, bool first)
584 {
585 bool progress;
586
587 NIR_PASS_V(nir, nir_lower_vars_to_ssa);
588 NIR_PASS_V(nir, nir_lower_alu_to_scalar, NULL, NULL);
589 NIR_PASS_V(nir, nir_lower_phis_to_scalar);
590
591 do {
592 progress = false;
593 bool lower_alu_to_scalar = false;
594 bool lower_phis_to_scalar = false;
595
596 if (first) {
597 bool opt_find_array_copies = false;
598
599 NIR_PASS(progress, nir, nir_split_array_vars, nir_var_function_temp);
600 NIR_PASS(lower_alu_to_scalar, nir, nir_shrink_vec_array_vars, nir_var_function_temp);
601 NIR_PASS(opt_find_array_copies, nir, nir_opt_find_array_copies);
602 NIR_PASS(progress, nir, nir_opt_copy_prop_vars);
603
604 /* Call nir_lower_var_copies() to remove any copies introduced
605 * by nir_opt_find_array_copies().
606 */
607 if (opt_find_array_copies)
608 NIR_PASS(progress, nir, nir_lower_var_copies);
609 progress |= opt_find_array_copies;
610 } else {
611 NIR_PASS(progress, nir, nir_opt_copy_prop_vars);
612 }
613
614 NIR_PASS(progress, nir, nir_opt_dead_write_vars);
615
616 NIR_PASS(lower_alu_to_scalar, nir, nir_opt_trivial_continues);
617 /* (Constant) copy propagation is needed for txf with offsets. */
618 NIR_PASS(progress, nir, nir_copy_prop);
619 NIR_PASS(progress, nir, nir_opt_remove_phis);
620 NIR_PASS(progress, nir, nir_opt_dce);
621 NIR_PASS(lower_phis_to_scalar, nir, nir_opt_if, true);
622 NIR_PASS(progress, nir, nir_opt_dead_cf);
623
624 if (lower_alu_to_scalar)
625 NIR_PASS_V(nir, nir_lower_alu_to_scalar, NULL, NULL);
626 if (lower_phis_to_scalar)
627 NIR_PASS_V(nir, nir_lower_phis_to_scalar);
628 progress |= lower_alu_to_scalar | lower_phis_to_scalar;
629
630 NIR_PASS(progress, nir, nir_opt_cse);
631 NIR_PASS(progress, nir, nir_opt_peephole_select, 8, true, true);
632
633 /* Needed for algebraic lowering */
634 NIR_PASS(progress, nir, nir_opt_algebraic);
635 NIR_PASS(progress, nir, nir_opt_constant_folding);
636
637 if (!nir->info.flrp_lowered) {
638 unsigned lower_flrp = (nir->options->lower_flrp16 ? 16 : 0) |
639 (nir->options->lower_flrp32 ? 32 : 0) |
640 (nir->options->lower_flrp64 ? 64 : 0);
641 assert(lower_flrp);
642 bool lower_flrp_progress = false;
643
644 NIR_PASS(lower_flrp_progress, nir, nir_lower_flrp, lower_flrp, false /* always_precise */,
645 nir->options->lower_ffma);
646 if (lower_flrp_progress) {
647 NIR_PASS(progress, nir, nir_opt_constant_folding);
648 progress = true;
649 }
650
651 /* Nothing should rematerialize any flrps, so we only
652 * need to do this lowering once.
653 */
654 nir->info.flrp_lowered = true;
655 }
656
657 NIR_PASS(progress, nir, nir_opt_undef);
658 NIR_PASS(progress, nir, nir_opt_conditional_discard);
659 if (nir->options->max_unroll_iterations) {
660 NIR_PASS(progress, nir, nir_opt_loop_unroll, 0);
661 }
662 } while (progress);
663 }
664
665 static int type_size_vec4(const struct glsl_type *type, bool bindless)
666 {
667 return glsl_count_attribute_slots(type, false);
668 }
669
670 static void si_nir_lower_color(nir_shader *nir)
671 {
672 nir_function_impl *entrypoint = nir_shader_get_entrypoint(nir);
673
674 nir_builder b;
675 nir_builder_init(&b, entrypoint);
676
677 nir_foreach_block (block, entrypoint) {
678 nir_foreach_instr_safe (instr, block) {
679 if (instr->type != nir_instr_type_intrinsic)
680 continue;
681
682 nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
683
684 if (intrin->intrinsic != nir_intrinsic_load_deref)
685 continue;
686
687 nir_deref_instr *deref = nir_src_as_deref(intrin->src[0]);
688 if (deref->mode != nir_var_shader_in)
689 continue;
690
691 b.cursor = nir_before_instr(instr);
692 nir_variable *var = nir_deref_instr_get_variable(deref);
693 nir_ssa_def *def;
694
695 if (var->data.location == VARYING_SLOT_COL0) {
696 def = nir_load_color0(&b);
697 nir->info.fs.color0_interp = var->data.interpolation;
698 nir->info.fs.color0_sample = var->data.sample;
699 nir->info.fs.color0_centroid = var->data.centroid;
700 } else if (var->data.location == VARYING_SLOT_COL1) {
701 def = nir_load_color1(&b);
702 nir->info.fs.color1_interp = var->data.interpolation;
703 nir->info.fs.color1_sample = var->data.sample;
704 nir->info.fs.color1_centroid = var->data.centroid;
705 } else {
706 continue;
707 }
708
709 nir_ssa_def_rewrite_uses(&intrin->dest.ssa, nir_src_for_ssa(def));
710 nir_instr_remove(instr);
711 }
712 }
713 }
714
715 static void si_lower_io(struct nir_shader *nir)
716 {
717 /* HW supports indirect indexing for: | Enabled in driver
718 * -------------------------------------------------------
719 * VS inputs | No
720 * TCS inputs | Yes
721 * TES inputs | Yes
722 * GS inputs | No
723 * -------------------------------------------------------
724 * VS outputs before TCS | No
725 * VS outputs before GS | No
726 * TCS outputs | Yes
727 * TES outputs before GS | No
728 */
729 bool has_indirect_inputs = nir->info.stage == MESA_SHADER_TESS_CTRL ||
730 nir->info.stage == MESA_SHADER_TESS_EVAL;
731 bool has_indirect_outputs = nir->info.stage == MESA_SHADER_TESS_CTRL;
732
733 if (!has_indirect_inputs || !has_indirect_outputs) {
734 NIR_PASS_V(nir, nir_lower_io_to_temporaries, nir_shader_get_entrypoint(nir),
735 !has_indirect_outputs, !has_indirect_inputs);
736
737 /* Since we're doing nir_lower_io_to_temporaries late, we need
738 * to lower all the copy_deref's introduced by
739 * lower_io_to_temporaries before calling nir_lower_io.
740 */
741 NIR_PASS_V(nir, nir_split_var_copies);
742 NIR_PASS_V(nir, nir_lower_var_copies);
743 NIR_PASS_V(nir, nir_lower_global_vars_to_local);
744 }
745
746 if (nir->info.stage == MESA_SHADER_FRAGMENT)
747 si_nir_lower_color(nir);
748
749 NIR_PASS_V(nir, nir_lower_io, nir_var_shader_out | nir_var_shader_in,
750 type_size_vec4, 0);
751 nir->info.io_lowered = true;
752
753 /* This pass needs actual constants */
754 NIR_PASS_V(nir, nir_opt_constant_folding);
755 NIR_PASS_V(nir, nir_io_add_const_offset_to_base, nir_var_shader_in);
756 NIR_PASS_V(nir, nir_io_add_const_offset_to_base, nir_var_shader_out);
757
758 /* Remove dead derefs, so that nir_validate doesn't fail. */
759 NIR_PASS_V(nir, nir_opt_dce);
760
761 /* Remove input and output nir_variables, because we don't need them
762 * anymore. Also remove uniforms, because those should have been lowered
763 * to UBOs already.
764 */
765 unsigned modes = nir_var_shader_in | nir_var_shader_out | nir_var_uniform;
766 nir_foreach_variable_with_modes_safe(var, nir, modes) {
767 if (var->data.mode == nir_var_uniform &&
768 (glsl_type_get_image_count(var->type) ||
769 glsl_type_get_sampler_count(var->type)))
770 continue;
771
772 exec_node_remove(&var->node);
773 }
774 }
775
776 /**
777 * Perform "lowering" operations on the NIR that are run once when the shader
778 * selector is created.
779 */
780 static void si_lower_nir(struct si_screen *sscreen, struct nir_shader *nir)
781 {
782 /* Perform lowerings (and optimizations) of code.
783 *
784 * Performance considerations aside, we must:
785 * - lower certain ALU operations
786 * - ensure constant offsets for texture instructions are folded
787 * and copy-propagated
788 */
789
790 static const struct nir_lower_tex_options lower_tex_options = {
791 .lower_txp = ~0u,
792 };
793 NIR_PASS_V(nir, nir_lower_tex, &lower_tex_options);
794
795 const nir_lower_subgroups_options subgroups_options = {
796 .subgroup_size = 64,
797 .ballot_bit_size = 64,
798 .lower_to_scalar = true,
799 .lower_subgroup_masks = true,
800 .lower_vote_trivial = false,
801 .lower_vote_eq_to_ballot = true,
802 };
803 NIR_PASS_V(nir, nir_lower_subgroups, &subgroups_options);
804
805 /* Lower load constants to scalar and then clean up the mess */
806 NIR_PASS_V(nir, nir_lower_load_const_to_scalar);
807 NIR_PASS_V(nir, nir_lower_var_copies);
808 NIR_PASS_V(nir, nir_lower_pack);
809 NIR_PASS_V(nir, nir_opt_access);
810 si_nir_opts(nir, true);
811
812 /* Lower large variables that are always constant with load_constant
813 * intrinsics, which get turned into PC-relative loads from a data
814 * section next to the shader.
815 *
816 * st/mesa calls finalize_nir twice, but we can't call this pass twice.
817 */
818 bool changed = false;
819 if (!nir->constant_data) {
820 /* The pass crashes if there are dead temps of lowered IO interface types. */
821 NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp, NULL);
822 NIR_PASS(changed, nir, nir_opt_large_constants, glsl_get_natural_size_align_bytes, 16);
823 }
824
825 changed |= ac_lower_indirect_derefs(nir, sscreen->info.chip_class);
826 if (changed)
827 si_nir_opts(nir, false);
828
829 NIR_PASS_V(nir, nir_lower_bool_to_int32);
830 NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp, NULL);
831
832 if (sscreen->debug_flags & DBG(FS_CORRECT_DERIVS_AFTER_KILL))
833 NIR_PASS_V(nir, nir_lower_discard_to_demote);
834 }
835
836 void si_finalize_nir(struct pipe_screen *screen, void *nirptr, bool optimize)
837 {
838 struct si_screen *sscreen = (struct si_screen *)screen;
839 struct nir_shader *nir = (struct nir_shader *)nirptr;
840
841 nir_shader_gather_info(nir, nir_shader_get_entrypoint(nir));
842 si_lower_io(nir);
843 si_lower_nir(sscreen, nir);
844 }