src/amd/vulkan/radv_meta.c

   1 /*
   2  * Copyright © 2016 Red Hat
   3  * based on intel anv code:
   4  * Copyright © 2015 Intel Corporation
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the next
  14  * paragraph) shall be included in all copies or substantial portions of the
  15  * Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  23  * IN THE SOFTWARE.
  24  */
  25
  26 #include "radv_meta.h"
  27
  28 #include <fcntl.h>
  29 #include <limits.h>
  30 #include <pwd.h>
  31 #include <sys/stat.h>
  32
  33 void
  34 radv_meta_save(struct radv_meta_saved_state *state,
  35                struct radv_cmd_buffer *cmd_buffer, uint32_t flags)
  36 {
  37         assert(flags & (RADV_META_SAVE_GRAPHICS_PIPELINE |
  38                         RADV_META_SAVE_COMPUTE_PIPELINE));
  39
  40         state->flags = flags;
  41
  42         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
  43                 assert(!(state->flags & RADV_META_SAVE_COMPUTE_PIPELINE));
  44
  45                 state->old_pipeline = cmd_buffer->state.pipeline;
  46
  47                 /* Save all viewports. */
  48                 state->viewport.count = cmd_buffer->state.dynamic.viewport.count;
  49                 typed_memcpy(state->viewport.viewports,
  50                              cmd_buffer->state.dynamic.viewport.viewports,
  51                              MAX_VIEWPORTS);
  52
  53                 /* Save all scissors. */
  54                 state->scissor.count = cmd_buffer->state.dynamic.scissor.count;
  55                 typed_memcpy(state->scissor.scissors,
  56                              cmd_buffer->state.dynamic.scissor.scissors,
  57                              MAX_SCISSORS);
  58
  59                 /* The most common meta operations all want to have the
  60                  * viewport reset and any scissors disabled. The rest of the
  61                  * dynamic state should have no effect.
  62                  */
  63                 cmd_buffer->state.dynamic.viewport.count = 0;
  64                 cmd_buffer->state.dynamic.scissor.count = 0;
  65                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
  66                                            1 << VK_DYNAMIC_STATE_SCISSOR;
  67         }
  68
  69         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
  70                 assert(!(state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE));
  71
  72                 state->old_pipeline = cmd_buffer->state.compute_pipeline;
  73         }
  74
  75         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
  76                 if (cmd_buffer->state.valid_descriptors & (1 << 0))
  77                         state->old_descriptor_set0 = cmd_buffer->descriptors[0];
  78                 else
  79                         state->old_descriptor_set0 = NULL;
  80         }
  81
  82         if (state->flags & RADV_META_SAVE_CONSTANTS) {
  83                 memcpy(state->push_constants, cmd_buffer->push_constants,
  84                        MAX_PUSH_CONSTANTS_SIZE);
  85         }
  86
  87         if (state->flags & RADV_META_SAVE_PASS) {
  88                 state->pass = cmd_buffer->state.pass;
  89                 state->subpass = cmd_buffer->state.subpass;
  90                 state->framebuffer = cmd_buffer->state.framebuffer;
  91                 state->attachments = cmd_buffer->state.attachments;
  92                 state->render_area = cmd_buffer->state.render_area;
  93         }
  94 }
  95
  96 void
  97 radv_meta_restore(const struct radv_meta_saved_state *state,
  98                   struct radv_cmd_buffer *cmd_buffer)
  99 {
 100         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 101                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 102                                      VK_PIPELINE_BIND_POINT_GRAPHICS,
 103                                      radv_pipeline_to_handle(state->old_pipeline));
 104
 105                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_PIPELINE;
 106
 107                 /* Restore all viewports. */
 108                 cmd_buffer->state.dynamic.viewport.count = state->viewport.count;
 109                 typed_memcpy(cmd_buffer->state.dynamic.viewport.viewports,
 110                              state->viewport.viewports,
 111                              MAX_VIEWPORTS);
 112
 113                 /* Restore all scissors. */
 114                 cmd_buffer->state.dynamic.scissor.count = state->scissor.count;
 115                 typed_memcpy(cmd_buffer->state.dynamic.scissor.scissors,
 116                              state->scissor.scissors,
 117                              MAX_SCISSORS);
 118
 119                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
 120                                            1 << VK_DYNAMIC_STATE_SCISSOR;
 121         }
 122
 123         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
 124                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 125                                      VK_PIPELINE_BIND_POINT_COMPUTE,
 126                                      radv_pipeline_to_handle(state->old_pipeline));
 127         }
 128
 129         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
 130                 radv_set_descriptor_set(cmd_buffer, state->old_descriptor_set0, 0);
 131         }
 132
 133         if (state->flags & RADV_META_SAVE_CONSTANTS) {
 134                 memcpy(cmd_buffer->push_constants, state->push_constants,
 135                        MAX_PUSH_CONSTANTS_SIZE);
 136                 cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_COMPUTE_BIT;
 137
 138                 if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 139                         cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_ALL_GRAPHICS;
 140                 }
 141         }
 142
 143         if (state->flags & RADV_META_SAVE_PASS) {
 144                 cmd_buffer->state.pass = state->pass;
 145                 cmd_buffer->state.subpass = state->subpass;
 146                 cmd_buffer->state.framebuffer = state->framebuffer;
 147                 cmd_buffer->state.attachments = state->attachments;
 148                 cmd_buffer->state.render_area = state->render_area;
 149                 if (state->subpass)
 150                         cmd_buffer->state.dirty |= RADV_CMD_DIRTY_FRAMEBUFFER;
 151         }
 152 }
 153
 154 VkImageViewType
 155 radv_meta_get_view_type(const struct radv_image *image)
 156 {
 157         switch (image->type) {
 158         case VK_IMAGE_TYPE_1D: return VK_IMAGE_VIEW_TYPE_1D;
 159         case VK_IMAGE_TYPE_2D: return VK_IMAGE_VIEW_TYPE_2D;
 160         case VK_IMAGE_TYPE_3D: return VK_IMAGE_VIEW_TYPE_3D;
 161         default:
 162                 unreachable("bad VkImageViewType");
 163         }
 164 }
 165
 166 /**
 167  * When creating a destination VkImageView, this function provides the needed
 168  * VkImageViewCreateInfo::subresourceRange::baseArrayLayer.
 169  */
 170 uint32_t
 171 radv_meta_get_iview_layer(const struct radv_image *dest_image,
 172                           const VkImageSubresourceLayers *dest_subresource,
 173                           const VkOffset3D *dest_offset)
 174 {
 175         switch (dest_image->type) {
 176         case VK_IMAGE_TYPE_1D:
 177         case VK_IMAGE_TYPE_2D:
 178                 return dest_subresource->baseArrayLayer;
 179         case VK_IMAGE_TYPE_3D:
 180                 /* HACK: Vulkan does not allow attaching a 3D image to a framebuffer,
 181                  * but meta does it anyway. When doing so, we translate the
 182                  * destination's z offset into an array offset.
 183                  */
 184                 return dest_offset->z;
 185         default:
 186                 assert(!"bad VkImageType");
 187                 return 0;
 188         }
 189 }
 190
 191 static void *
 192 meta_alloc(void* _device, size_t size, size_t alignment,
 193            VkSystemAllocationScope allocationScope)
 194 {
 195         struct radv_device *device = _device;
 196         return device->alloc.pfnAllocation(device->alloc.pUserData, size, alignment,
 197                                            VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 198 }
 199
 200 static void *
 201 meta_realloc(void* _device, void *original, size_t size, size_t alignment,
 202              VkSystemAllocationScope allocationScope)
 203 {
 204         struct radv_device *device = _device;
 205         return device->alloc.pfnReallocation(device->alloc.pUserData, original,
 206                                              size, alignment,
 207                                              VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 208 }
 209
 210 static void
 211 meta_free(void* _device, void *data)
 212 {
 213         struct radv_device *device = _device;
 214         return device->alloc.pfnFree(device->alloc.pUserData, data);
 215 }
 216
 217 static bool
 218 radv_builtin_cache_path(char *path)
 219 {
 220         char *xdg_cache_home = getenv("XDG_CACHE_HOME");
 221         const char *suffix = "/radv_builtin_shaders";
 222         const char *suffix2 = "/.cache/radv_builtin_shaders";
 223         struct passwd pwd, *result;
 224         char path2[PATH_MAX + 1]; /* PATH_MAX is not a real max,but suffices here. */
 225
 226         if (xdg_cache_home) {
 227
 228                 if (strlen(xdg_cache_home) + strlen(suffix) > PATH_MAX)
 229                         return false;
 230
 231                 strcpy(path, xdg_cache_home);
 232                 strcat(path, suffix);
 233                 return true;
 234         }
 235
 236         getpwuid_r(getuid(), &pwd, path2, PATH_MAX - strlen(suffix2), &result);
 237         if (!result)
 238                 return false;
 239
 240         strcpy(path, pwd.pw_dir);
 241         strcat(path, "/.cache");
 242         mkdir(path, 0755);
 243
 244         strcat(path, suffix);
 245         return true;
 246 }
 247
 248 static void
 249 radv_load_meta_pipeline(struct radv_device *device)
 250 {
 251         char path[PATH_MAX + 1];
 252         struct stat st;
 253         void *data = NULL;
 254
 255         if (!radv_builtin_cache_path(path))
 256                 return;
 257
 258         int fd = open(path, O_RDONLY);
 259         if (fd < 0)
 260                 return;
 261         if (fstat(fd, &st))
 262                 goto fail;
 263         data = malloc(st.st_size);
 264         if (!data)
 265                 goto fail;
 266         if(read(fd, data, st.st_size) == -1)
 267                 goto fail;
 268
 269         radv_pipeline_cache_load(&device->meta_state.cache, data, st.st_size);
 270 fail:
 271         free(data);
 272         close(fd);
 273 }
 274
 275 static void
 276 radv_store_meta_pipeline(struct radv_device *device)
 277 {
 278         char path[PATH_MAX + 1], path2[PATH_MAX + 7];
 279         size_t size;
 280         void *data = NULL;
 281
 282         if (!device->meta_state.cache.modified)
 283                 return;
 284
 285         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 286                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 287                                       &size, NULL))
 288                 return;
 289
 290         if (!radv_builtin_cache_path(path))
 291                 return;
 292
 293         strcpy(path2, path);
 294         strcat(path2, "XXXXXX");
 295         int fd = mkstemp(path2);//open(path, O_WRONLY | O_CREAT, 0600);
 296         if (fd < 0)
 297                 return;
 298         data = malloc(size);
 299         if (!data)
 300                 goto fail;
 301
 302         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 303                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 304                                       &size, data))
 305                 goto fail;
 306         if(write(fd, data, size) == -1)
 307                 goto fail;
 308
 309         rename(path2, path);
 310 fail:
 311         free(data);
 312         close(fd);
 313         unlink(path2);
 314 }
 315
 316 VkResult
 317 radv_device_init_meta(struct radv_device *device)
 318 {
 319         VkResult result;
 320
 321         device->meta_state.alloc = (VkAllocationCallbacks) {
 322                 .pUserData = device,
 323                 .pfnAllocation = meta_alloc,
 324                 .pfnReallocation = meta_realloc,
 325                 .pfnFree = meta_free,
 326         };
 327
 328         device->meta_state.cache.alloc = device->meta_state.alloc;
 329         radv_pipeline_cache_init(&device->meta_state.cache, device);
 330         radv_load_meta_pipeline(device);
 331
 332         result = radv_device_init_meta_clear_state(device);
 333         if (result != VK_SUCCESS)
 334                 goto fail_clear;
 335
 336         result = radv_device_init_meta_resolve_state(device);
 337         if (result != VK_SUCCESS)
 338                 goto fail_resolve;
 339
 340         result = radv_device_init_meta_blit_state(device);
 341         if (result != VK_SUCCESS)
 342                 goto fail_blit;
 343
 344         result = radv_device_init_meta_blit2d_state(device);
 345         if (result != VK_SUCCESS)
 346                 goto fail_blit2d;
 347
 348         result = radv_device_init_meta_bufimage_state(device);
 349         if (result != VK_SUCCESS)
 350                 goto fail_bufimage;
 351
 352         result = radv_device_init_meta_depth_decomp_state(device);
 353         if (result != VK_SUCCESS)
 354                 goto fail_depth_decomp;
 355
 356         result = radv_device_init_meta_buffer_state(device);
 357         if (result != VK_SUCCESS)
 358                 goto fail_buffer;
 359
 360         result = radv_device_init_meta_query_state(device);
 361         if (result != VK_SUCCESS)
 362                 goto fail_query;
 363
 364         result = radv_device_init_meta_fast_clear_flush_state(device);
 365         if (result != VK_SUCCESS)
 366                 goto fail_fast_clear;
 367
 368         result = radv_device_init_meta_resolve_compute_state(device);
 369         if (result != VK_SUCCESS)
 370                 goto fail_resolve_compute;
 371
 372         result = radv_device_init_meta_resolve_fragment_state(device);
 373         if (result != VK_SUCCESS)
 374                 goto fail_resolve_fragment;
 375         return VK_SUCCESS;
 376
 377 fail_resolve_fragment:
 378         radv_device_finish_meta_resolve_compute_state(device);
 379 fail_resolve_compute:
 380         radv_device_finish_meta_fast_clear_flush_state(device);
 381 fail_fast_clear:
 382         radv_device_finish_meta_query_state(device);
 383 fail_query:
 384         radv_device_finish_meta_buffer_state(device);
 385 fail_buffer:
 386         radv_device_finish_meta_depth_decomp_state(device);
 387 fail_depth_decomp:
 388         radv_device_finish_meta_bufimage_state(device);
 389 fail_bufimage:
 390         radv_device_finish_meta_blit2d_state(device);
 391 fail_blit2d:
 392         radv_device_finish_meta_blit_state(device);
 393 fail_blit:
 394         radv_device_finish_meta_resolve_state(device);
 395 fail_resolve:
 396         radv_device_finish_meta_clear_state(device);
 397 fail_clear:
 398         radv_pipeline_cache_finish(&device->meta_state.cache);
 399         return result;
 400 }
 401
 402 void
 403 radv_device_finish_meta(struct radv_device *device)
 404 {
 405         radv_device_finish_meta_clear_state(device);
 406         radv_device_finish_meta_resolve_state(device);
 407         radv_device_finish_meta_blit_state(device);
 408         radv_device_finish_meta_blit2d_state(device);
 409         radv_device_finish_meta_bufimage_state(device);
 410         radv_device_finish_meta_depth_decomp_state(device);
 411         radv_device_finish_meta_query_state(device);
 412         radv_device_finish_meta_buffer_state(device);
 413         radv_device_finish_meta_fast_clear_flush_state(device);
 414         radv_device_finish_meta_resolve_compute_state(device);
 415         radv_device_finish_meta_resolve_fragment_state(device);
 416
 417         radv_store_meta_pipeline(device);
 418         radv_pipeline_cache_finish(&device->meta_state.cache);
 419 }
 420
 421 nir_ssa_def *radv_meta_gen_rect_vertices_comp2(nir_builder *vs_b, nir_ssa_def *comp2)
 422 {
 423
 424         nir_intrinsic_instr *vertex_id = nir_intrinsic_instr_create(vs_b->shader, nir_intrinsic_load_vertex_id_zero_base);
 425         nir_ssa_dest_init(&vertex_id->instr, &vertex_id->dest, 1, 32, "vertexid");
 426         nir_builder_instr_insert(vs_b, &vertex_id->instr);
 427
 428         /* vertex 0 - -1.0, -1.0 */
 429         /* vertex 1 - -1.0, 1.0 */
 430         /* vertex 2 - 1.0, -1.0 */
 431         /* so channel 0 is vertex_id != 2 ? -1.0 : 1.0
 432            channel 1 is vertex id != 1 ? -1.0 : 1.0 */
 433
 434         nir_ssa_def *c0cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 435                                      nir_imm_int(vs_b, 2));
 436         nir_ssa_def *c1cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 437                                      nir_imm_int(vs_b, 1));
 438
 439         nir_ssa_def *comp[4];
 440         comp[0] = nir_bcsel(vs_b, c0cmp,
 441                             nir_imm_float(vs_b, -1.0),
 442                             nir_imm_float(vs_b, 1.0));
 443
 444         comp[1] = nir_bcsel(vs_b, c1cmp,
 445                             nir_imm_float(vs_b, -1.0),
 446                             nir_imm_float(vs_b, 1.0));
 447         comp[2] = comp2;
 448         comp[3] = nir_imm_float(vs_b, 1.0);
 449         nir_ssa_def *outvec = nir_vec(vs_b, comp, 4);
 450
 451         return outvec;
 452 }
 453
 454 nir_ssa_def *radv_meta_gen_rect_vertices(nir_builder *vs_b)
 455 {
 456         return radv_meta_gen_rect_vertices_comp2(vs_b, nir_imm_float(vs_b, 0.0));
 457 }
 458
 459 /* vertex shader that generates vertices */
 460 nir_shader *
 461 radv_meta_build_nir_vs_generate_vertices(void)
 462 {
 463         const struct glsl_type *vec4 = glsl_vec4_type();
 464
 465         nir_builder b;
 466         nir_variable *v_position;
 467
 468         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_VERTEX, NULL);
 469         b.shader->info.name = ralloc_strdup(b.shader, "meta_vs_gen_verts");
 470
 471         nir_ssa_def *outvec = radv_meta_gen_rect_vertices(&b);
 472
 473         v_position = nir_variable_create(b.shader, nir_var_shader_out, vec4,
 474                                          "gl_Position");
 475         v_position->data.location = VARYING_SLOT_POS;
 476
 477         nir_store_var(&b, v_position, outvec, 0xf);
 478
 479         return b.shader;
 480 }
 481
 482 nir_shader *
 483 radv_meta_build_nir_fs_noop(void)
 484 {
 485         nir_builder b;
 486
 487         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, NULL);
 488         b.shader->info.name = ralloc_asprintf(b.shader,
 489                                                "meta_noop_fs");
 490
 491         return b.shader;
 492 }
 493
 494 void radv_meta_build_resolve_shader_core(nir_builder *b,
 495                                          bool is_integer,
 496                                          int samples,
 497                                          nir_variable *input_img,
 498                                          nir_variable *color,
 499                                          nir_ssa_def *img_coord)
 500 {
 501         /* do a txf_ms on each sample */
 502         nir_ssa_def *tmp;
 503         nir_if *outer_if = NULL;
 504
 505         nir_tex_instr *tex = nir_tex_instr_create(b->shader, 2);
 506         tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
 507         tex->op = nir_texop_txf_ms;
 508         tex->src[0].src_type = nir_tex_src_coord;
 509         tex->src[0].src = nir_src_for_ssa(img_coord);
 510         tex->src[1].src_type = nir_tex_src_ms_index;
 511         tex->src[1].src = nir_src_for_ssa(nir_imm_int(b, 0));
 512         tex->dest_type = nir_type_float;
 513         tex->is_array = false;
 514         tex->coord_components = 2;
 515         tex->texture = nir_deref_var_create(tex, input_img);
 516         tex->sampler = NULL;
 517
 518         nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, "tex");
 519         nir_builder_instr_insert(b, &tex->instr);
 520
 521         tmp = &tex->dest.ssa;
 522
 523         if (!is_integer && samples > 1) {
 524                 nir_tex_instr *tex_all_same = nir_tex_instr_create(b->shader, 1);
 525                 tex_all_same->sampler_dim = GLSL_SAMPLER_DIM_MS;
 526                 tex_all_same->op = nir_texop_samples_identical;
 527                 tex_all_same->src[0].src_type = nir_tex_src_coord;
 528                 tex_all_same->src[0].src = nir_src_for_ssa(img_coord);
 529                 tex_all_same->dest_type = nir_type_float;
 530                 tex_all_same->is_array = false;
 531                 tex_all_same->coord_components = 2;
 532                 tex_all_same->texture = nir_deref_var_create(tex_all_same, input_img);
 533                 tex_all_same->sampler = NULL;
 534
 535                 nir_ssa_dest_init(&tex_all_same->instr, &tex_all_same->dest, 1, 32, "tex");
 536                 nir_builder_instr_insert(b, &tex_all_same->instr);
 537
 538                 nir_ssa_def *all_same = nir_ieq(b, &tex_all_same->dest.ssa, nir_imm_int(b, 0));
 539                 nir_if *if_stmt = nir_if_create(b->shader);
 540                 if_stmt->condition = nir_src_for_ssa(all_same);
 541                 nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
 542
 543                 b->cursor = nir_after_cf_list(&if_stmt->then_list);
 544                 for (int i = 1; i < samples; i++) {
 545                         nir_tex_instr *tex_add = nir_tex_instr_create(b->shader, 2);
 546                         tex_add->sampler_dim = GLSL_SAMPLER_DIM_MS;
 547                         tex_add->op = nir_texop_txf_ms;
 548                         tex_add->src[0].src_type = nir_tex_src_coord;
 549                         tex_add->src[0].src = nir_src_for_ssa(img_coord);
 550                         tex_add->src[1].src_type = nir_tex_src_ms_index;
 551                         tex_add->src[1].src = nir_src_for_ssa(nir_imm_int(b, i));
 552                         tex_add->dest_type = nir_type_float;
 553                         tex_add->is_array = false;
 554                         tex_add->coord_components = 2;
 555                         tex_add->texture = nir_deref_var_create(tex_add, input_img);
 556                         tex_add->sampler = NULL;
 557
 558                         nir_ssa_dest_init(&tex_add->instr, &tex_add->dest, 4, 32, "tex");
 559                         nir_builder_instr_insert(b, &tex_add->instr);
 560
 561                         tmp = nir_fadd(b, tmp, &tex_add->dest.ssa);
 562                 }
 563
 564                 tmp = nir_fdiv(b, tmp, nir_imm_float(b, samples));
 565                 nir_store_var(b, color, tmp, 0xf);
 566                 b->cursor = nir_after_cf_list(&if_stmt->else_list);
 567                 outer_if = if_stmt;
 568         }
 569         nir_store_var(b, color, &tex->dest.ssa, 0xf);
 570
 571         if (outer_if)
 572                 b->cursor = nir_after_cf_node(&outer_if->cf_node);
 573 }