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         VkPipelineBindPoint bind_point =
  38                 flags & RADV_META_SAVE_GRAPHICS_PIPELINE ?
  39                         VK_PIPELINE_BIND_POINT_GRAPHICS :
  40                         VK_PIPELINE_BIND_POINT_COMPUTE;
  41         struct radv_descriptor_state *descriptors_state =
  42                 radv_get_descriptors_state(cmd_buffer, bind_point);
  43
  44         assert(flags & (RADV_META_SAVE_GRAPHICS_PIPELINE |
  45                         RADV_META_SAVE_COMPUTE_PIPELINE));
  46
  47         state->flags = flags;
  48
  49         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
  50                 assert(!(state->flags & RADV_META_SAVE_COMPUTE_PIPELINE));
  51
  52                 state->old_pipeline = cmd_buffer->state.pipeline;
  53
  54                 /* Save all viewports. */
  55                 state->viewport.count = cmd_buffer->state.dynamic.viewport.count;
  56                 typed_memcpy(state->viewport.viewports,
  57                              cmd_buffer->state.dynamic.viewport.viewports,
  58                              MAX_VIEWPORTS);
  59
  60                 /* Save all scissors. */
  61                 state->scissor.count = cmd_buffer->state.dynamic.scissor.count;
  62                 typed_memcpy(state->scissor.scissors,
  63                              cmd_buffer->state.dynamic.scissor.scissors,
  64                              MAX_SCISSORS);
  65
  66                 /* The most common meta operations all want to have the
  67                  * viewport reset and any scissors disabled. The rest of the
  68                  * dynamic state should have no effect.
  69                  */
  70                 cmd_buffer->state.dynamic.viewport.count = 0;
  71                 cmd_buffer->state.dynamic.scissor.count = 0;
  72                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
  73                                            1 << VK_DYNAMIC_STATE_SCISSOR;
  74         }
  75
  76         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
  77                 assert(!(state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE));
  78
  79                 state->old_pipeline = cmd_buffer->state.compute_pipeline;
  80         }
  81
  82         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
  83                 if (descriptors_state->valid & (1 << 0))
  84                         state->old_descriptor_set0 = descriptors_state->sets[0];
  85                 else
  86                         state->old_descriptor_set0 = NULL;
  87         }
  88
  89         if (state->flags & RADV_META_SAVE_CONSTANTS) {
  90                 memcpy(state->push_constants, cmd_buffer->push_constants,
  91                        MAX_PUSH_CONSTANTS_SIZE);
  92         }
  93
  94         if (state->flags & RADV_META_SAVE_PASS) {
  95                 state->pass = cmd_buffer->state.pass;
  96                 state->subpass = cmd_buffer->state.subpass;
  97                 state->framebuffer = cmd_buffer->state.framebuffer;
  98                 state->attachments = cmd_buffer->state.attachments;
  99                 state->render_area = cmd_buffer->state.render_area;
 100         }
 101 }
 102
 103 void
 104 radv_meta_restore(const struct radv_meta_saved_state *state,
 105                   struct radv_cmd_buffer *cmd_buffer)
 106 {
 107         VkPipelineBindPoint bind_point =
 108                 state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE ?
 109                         VK_PIPELINE_BIND_POINT_GRAPHICS :
 110                         VK_PIPELINE_BIND_POINT_COMPUTE;
 111
 112         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 113                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 114                                      VK_PIPELINE_BIND_POINT_GRAPHICS,
 115                                      radv_pipeline_to_handle(state->old_pipeline));
 116
 117                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_PIPELINE;
 118
 119                 /* Restore all viewports. */
 120                 cmd_buffer->state.dynamic.viewport.count = state->viewport.count;
 121                 typed_memcpy(cmd_buffer->state.dynamic.viewport.viewports,
 122                              state->viewport.viewports,
 123                              MAX_VIEWPORTS);
 124
 125                 /* Restore all scissors. */
 126                 cmd_buffer->state.dynamic.scissor.count = state->scissor.count;
 127                 typed_memcpy(cmd_buffer->state.dynamic.scissor.scissors,
 128                              state->scissor.scissors,
 129                              MAX_SCISSORS);
 130
 131                 cmd_buffer->state.dirty |= 1 << VK_DYNAMIC_STATE_VIEWPORT |
 132                                            1 << VK_DYNAMIC_STATE_SCISSOR;
 133         }
 134
 135         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
 136                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 137                                      VK_PIPELINE_BIND_POINT_COMPUTE,
 138                                      radv_pipeline_to_handle(state->old_pipeline));
 139         }
 140
 141         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
 142                 radv_set_descriptor_set(cmd_buffer, bind_point,
 143                                         state->old_descriptor_set0, 0);
 144         }
 145
 146         if (state->flags & RADV_META_SAVE_CONSTANTS) {
 147                 memcpy(cmd_buffer->push_constants, state->push_constants,
 148                        MAX_PUSH_CONSTANTS_SIZE);
 149                 cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_COMPUTE_BIT;
 150
 151                 if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 152                         cmd_buffer->push_constant_stages |= VK_SHADER_STAGE_ALL_GRAPHICS;
 153                 }
 154         }
 155
 156         if (state->flags & RADV_META_SAVE_PASS) {
 157                 cmd_buffer->state.pass = state->pass;
 158                 cmd_buffer->state.subpass = state->subpass;
 159                 cmd_buffer->state.framebuffer = state->framebuffer;
 160                 cmd_buffer->state.attachments = state->attachments;
 161                 cmd_buffer->state.render_area = state->render_area;
 162                 if (state->subpass)
 163                         cmd_buffer->state.dirty |= RADV_CMD_DIRTY_FRAMEBUFFER;
 164         }
 165 }
 166
 167 VkImageViewType
 168 radv_meta_get_view_type(const struct radv_image *image)
 169 {
 170         switch (image->type) {
 171         case VK_IMAGE_TYPE_1D: return VK_IMAGE_VIEW_TYPE_1D;
 172         case VK_IMAGE_TYPE_2D: return VK_IMAGE_VIEW_TYPE_2D;
 173         case VK_IMAGE_TYPE_3D: return VK_IMAGE_VIEW_TYPE_3D;
 174         default:
 175                 unreachable("bad VkImageViewType");
 176         }
 177 }
 178
 179 /**
 180  * When creating a destination VkImageView, this function provides the needed
 181  * VkImageViewCreateInfo::subresourceRange::baseArrayLayer.
 182  */
 183 uint32_t
 184 radv_meta_get_iview_layer(const struct radv_image *dest_image,
 185                           const VkImageSubresourceLayers *dest_subresource,
 186                           const VkOffset3D *dest_offset)
 187 {
 188         switch (dest_image->type) {
 189         case VK_IMAGE_TYPE_1D:
 190         case VK_IMAGE_TYPE_2D:
 191                 return dest_subresource->baseArrayLayer;
 192         case VK_IMAGE_TYPE_3D:
 193                 /* HACK: Vulkan does not allow attaching a 3D image to a framebuffer,
 194                  * but meta does it anyway. When doing so, we translate the
 195                  * destination's z offset into an array offset.
 196                  */
 197                 return dest_offset->z;
 198         default:
 199                 assert(!"bad VkImageType");
 200                 return 0;
 201         }
 202 }
 203
 204 static void *
 205 meta_alloc(void* _device, size_t size, size_t alignment,
 206            VkSystemAllocationScope allocationScope)
 207 {
 208         struct radv_device *device = _device;
 209         return device->alloc.pfnAllocation(device->alloc.pUserData, size, alignment,
 210                                            VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 211 }
 212
 213 static void *
 214 meta_realloc(void* _device, void *original, size_t size, size_t alignment,
 215              VkSystemAllocationScope allocationScope)
 216 {
 217         struct radv_device *device = _device;
 218         return device->alloc.pfnReallocation(device->alloc.pUserData, original,
 219                                              size, alignment,
 220                                              VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 221 }
 222
 223 static void
 224 meta_free(void* _device, void *data)
 225 {
 226         struct radv_device *device = _device;
 227         return device->alloc.pfnFree(device->alloc.pUserData, data);
 228 }
 229
 230 static bool
 231 radv_builtin_cache_path(char *path)
 232 {
 233         char *xdg_cache_home = getenv("XDG_CACHE_HOME");
 234         const char *suffix = "/radv_builtin_shaders";
 235         const char *suffix2 = "/.cache/radv_builtin_shaders";
 236         struct passwd pwd, *result;
 237         char path2[PATH_MAX + 1]; /* PATH_MAX is not a real max,but suffices here. */
 238
 239         if (xdg_cache_home) {
 240
 241                 if (strlen(xdg_cache_home) + strlen(suffix) > PATH_MAX)
 242                         return false;
 243
 244                 strcpy(path, xdg_cache_home);
 245                 strcat(path, suffix);
 246                 return true;
 247         }
 248
 249         getpwuid_r(getuid(), &pwd, path2, PATH_MAX - strlen(suffix2), &result);
 250         if (!result)
 251                 return false;
 252
 253         strcpy(path, pwd.pw_dir);
 254         strcat(path, "/.cache");
 255         mkdir(path, 0755);
 256
 257         strcat(path, suffix);
 258         return true;
 259 }
 260
 261 static void
 262 radv_load_meta_pipeline(struct radv_device *device)
 263 {
 264         char path[PATH_MAX + 1];
 265         struct stat st;
 266         void *data = NULL;
 267
 268         if (!radv_builtin_cache_path(path))
 269                 return;
 270
 271         int fd = open(path, O_RDONLY);
 272         if (fd < 0)
 273                 return;
 274         if (fstat(fd, &st))
 275                 goto fail;
 276         data = malloc(st.st_size);
 277         if (!data)
 278                 goto fail;
 279         if(read(fd, data, st.st_size) == -1)
 280                 goto fail;
 281
 282         radv_pipeline_cache_load(&device->meta_state.cache, data, st.st_size);
 283 fail:
 284         free(data);
 285         close(fd);
 286 }
 287
 288 static void
 289 radv_store_meta_pipeline(struct radv_device *device)
 290 {
 291         char path[PATH_MAX + 1], path2[PATH_MAX + 7];
 292         size_t size;
 293         void *data = NULL;
 294
 295         if (!device->meta_state.cache.modified)
 296                 return;
 297
 298         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 299                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 300                                       &size, NULL))
 301                 return;
 302
 303         if (!radv_builtin_cache_path(path))
 304                 return;
 305
 306         strcpy(path2, path);
 307         strcat(path2, "XXXXXX");
 308         int fd = mkstemp(path2);//open(path, O_WRONLY | O_CREAT, 0600);
 309         if (fd < 0)
 310                 return;
 311         data = malloc(size);
 312         if (!data)
 313                 goto fail;
 314
 315         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 316                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 317                                       &size, data))
 318                 goto fail;
 319         if(write(fd, data, size) == -1)
 320                 goto fail;
 321
 322         rename(path2, path);
 323 fail:
 324         free(data);
 325         close(fd);
 326         unlink(path2);
 327 }
 328
 329 VkResult
 330 radv_device_init_meta(struct radv_device *device)
 331 {
 332         VkResult result;
 333
 334         device->meta_state.alloc = (VkAllocationCallbacks) {
 335                 .pUserData = device,
 336                 .pfnAllocation = meta_alloc,
 337                 .pfnReallocation = meta_realloc,
 338                 .pfnFree = meta_free,
 339         };
 340
 341         device->meta_state.cache.alloc = device->meta_state.alloc;
 342         radv_pipeline_cache_init(&device->meta_state.cache, device);
 343         radv_load_meta_pipeline(device);
 344
 345         result = radv_device_init_meta_clear_state(device);
 346         if (result != VK_SUCCESS)
 347                 goto fail_clear;
 348
 349         result = radv_device_init_meta_resolve_state(device);
 350         if (result != VK_SUCCESS)
 351                 goto fail_resolve;
 352
 353         result = radv_device_init_meta_blit_state(device);
 354         if (result != VK_SUCCESS)
 355                 goto fail_blit;
 356
 357         result = radv_device_init_meta_blit2d_state(device);
 358         if (result != VK_SUCCESS)
 359                 goto fail_blit2d;
 360
 361         result = radv_device_init_meta_bufimage_state(device);
 362         if (result != VK_SUCCESS)
 363                 goto fail_bufimage;
 364
 365         result = radv_device_init_meta_depth_decomp_state(device);
 366         if (result != VK_SUCCESS)
 367                 goto fail_depth_decomp;
 368
 369         result = radv_device_init_meta_buffer_state(device);
 370         if (result != VK_SUCCESS)
 371                 goto fail_buffer;
 372
 373         result = radv_device_init_meta_query_state(device);
 374         if (result != VK_SUCCESS)
 375                 goto fail_query;
 376
 377         result = radv_device_init_meta_fast_clear_flush_state(device);
 378         if (result != VK_SUCCESS)
 379                 goto fail_fast_clear;
 380
 381         result = radv_device_init_meta_resolve_compute_state(device);
 382         if (result != VK_SUCCESS)
 383                 goto fail_resolve_compute;
 384
 385         result = radv_device_init_meta_resolve_fragment_state(device);
 386         if (result != VK_SUCCESS)
 387                 goto fail_resolve_fragment;
 388         return VK_SUCCESS;
 389
 390 fail_resolve_fragment:
 391         radv_device_finish_meta_resolve_compute_state(device);
 392 fail_resolve_compute:
 393         radv_device_finish_meta_fast_clear_flush_state(device);
 394 fail_fast_clear:
 395         radv_device_finish_meta_query_state(device);
 396 fail_query:
 397         radv_device_finish_meta_buffer_state(device);
 398 fail_buffer:
 399         radv_device_finish_meta_depth_decomp_state(device);
 400 fail_depth_decomp:
 401         radv_device_finish_meta_bufimage_state(device);
 402 fail_bufimage:
 403         radv_device_finish_meta_blit2d_state(device);
 404 fail_blit2d:
 405         radv_device_finish_meta_blit_state(device);
 406 fail_blit:
 407         radv_device_finish_meta_resolve_state(device);
 408 fail_resolve:
 409         radv_device_finish_meta_clear_state(device);
 410 fail_clear:
 411         radv_pipeline_cache_finish(&device->meta_state.cache);
 412         return result;
 413 }
 414
 415 void
 416 radv_device_finish_meta(struct radv_device *device)
 417 {
 418         radv_device_finish_meta_clear_state(device);
 419         radv_device_finish_meta_resolve_state(device);
 420         radv_device_finish_meta_blit_state(device);
 421         radv_device_finish_meta_blit2d_state(device);
 422         radv_device_finish_meta_bufimage_state(device);
 423         radv_device_finish_meta_depth_decomp_state(device);
 424         radv_device_finish_meta_query_state(device);
 425         radv_device_finish_meta_buffer_state(device);
 426         radv_device_finish_meta_fast_clear_flush_state(device);
 427         radv_device_finish_meta_resolve_compute_state(device);
 428         radv_device_finish_meta_resolve_fragment_state(device);
 429
 430         radv_store_meta_pipeline(device);
 431         radv_pipeline_cache_finish(&device->meta_state.cache);
 432 }
 433
 434 nir_ssa_def *radv_meta_gen_rect_vertices_comp2(nir_builder *vs_b, nir_ssa_def *comp2)
 435 {
 436
 437         nir_intrinsic_instr *vertex_id = nir_intrinsic_instr_create(vs_b->shader, nir_intrinsic_load_vertex_id_zero_base);
 438         nir_ssa_dest_init(&vertex_id->instr, &vertex_id->dest, 1, 32, "vertexid");
 439         nir_builder_instr_insert(vs_b, &vertex_id->instr);
 440
 441         /* vertex 0 - -1.0, -1.0 */
 442         /* vertex 1 - -1.0, 1.0 */
 443         /* vertex 2 - 1.0, -1.0 */
 444         /* so channel 0 is vertex_id != 2 ? -1.0 : 1.0
 445            channel 1 is vertex id != 1 ? -1.0 : 1.0 */
 446
 447         nir_ssa_def *c0cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 448                                      nir_imm_int(vs_b, 2));
 449         nir_ssa_def *c1cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 450                                      nir_imm_int(vs_b, 1));
 451
 452         nir_ssa_def *comp[4];
 453         comp[0] = nir_bcsel(vs_b, c0cmp,
 454                             nir_imm_float(vs_b, -1.0),
 455                             nir_imm_float(vs_b, 1.0));
 456
 457         comp[1] = nir_bcsel(vs_b, c1cmp,
 458                             nir_imm_float(vs_b, -1.0),
 459                             nir_imm_float(vs_b, 1.0));
 460         comp[2] = comp2;
 461         comp[3] = nir_imm_float(vs_b, 1.0);
 462         nir_ssa_def *outvec = nir_vec(vs_b, comp, 4);
 463
 464         return outvec;
 465 }
 466
 467 nir_ssa_def *radv_meta_gen_rect_vertices(nir_builder *vs_b)
 468 {
 469         return radv_meta_gen_rect_vertices_comp2(vs_b, nir_imm_float(vs_b, 0.0));
 470 }
 471
 472 /* vertex shader that generates vertices */
 473 nir_shader *
 474 radv_meta_build_nir_vs_generate_vertices(void)
 475 {
 476         const struct glsl_type *vec4 = glsl_vec4_type();
 477
 478         nir_builder b;
 479         nir_variable *v_position;
 480
 481         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_VERTEX, NULL);
 482         b.shader->info.name = ralloc_strdup(b.shader, "meta_vs_gen_verts");
 483
 484         nir_ssa_def *outvec = radv_meta_gen_rect_vertices(&b);
 485
 486         v_position = nir_variable_create(b.shader, nir_var_shader_out, vec4,
 487                                          "gl_Position");
 488         v_position->data.location = VARYING_SLOT_POS;
 489
 490         nir_store_var(&b, v_position, outvec, 0xf);
 491
 492         return b.shader;
 493 }
 494
 495 nir_shader *
 496 radv_meta_build_nir_fs_noop(void)
 497 {
 498         nir_builder b;
 499
 500         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, NULL);
 501         b.shader->info.name = ralloc_asprintf(b.shader,
 502                                                "meta_noop_fs");
 503
 504         return b.shader;
 505 }
 506
 507 void radv_meta_build_resolve_shader_core(nir_builder *b,
 508                                          bool is_integer,
 509                                          int samples,
 510                                          nir_variable *input_img,
 511                                          nir_variable *color,
 512                                          nir_ssa_def *img_coord)
 513 {
 514         /* do a txf_ms on each sample */
 515         nir_ssa_def *tmp;
 516         nir_if *outer_if = NULL;
 517
 518         nir_tex_instr *tex = nir_tex_instr_create(b->shader, 2);
 519         tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
 520         tex->op = nir_texop_txf_ms;
 521         tex->src[0].src_type = nir_tex_src_coord;
 522         tex->src[0].src = nir_src_for_ssa(img_coord);
 523         tex->src[1].src_type = nir_tex_src_ms_index;
 524         tex->src[1].src = nir_src_for_ssa(nir_imm_int(b, 0));
 525         tex->dest_type = nir_type_float;
 526         tex->is_array = false;
 527         tex->coord_components = 2;
 528         tex->texture = nir_deref_var_create(tex, input_img);
 529         tex->sampler = NULL;
 530
 531         nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, "tex");
 532         nir_builder_instr_insert(b, &tex->instr);
 533
 534         tmp = &tex->dest.ssa;
 535
 536         if (!is_integer && samples > 1) {
 537                 nir_tex_instr *tex_all_same = nir_tex_instr_create(b->shader, 1);
 538                 tex_all_same->sampler_dim = GLSL_SAMPLER_DIM_MS;
 539                 tex_all_same->op = nir_texop_samples_identical;
 540                 tex_all_same->src[0].src_type = nir_tex_src_coord;
 541                 tex_all_same->src[0].src = nir_src_for_ssa(img_coord);
 542                 tex_all_same->dest_type = nir_type_float;
 543                 tex_all_same->is_array = false;
 544                 tex_all_same->coord_components = 2;
 545                 tex_all_same->texture = nir_deref_var_create(tex_all_same, input_img);
 546                 tex_all_same->sampler = NULL;
 547
 548                 nir_ssa_dest_init(&tex_all_same->instr, &tex_all_same->dest, 1, 32, "tex");
 549                 nir_builder_instr_insert(b, &tex_all_same->instr);
 550
 551                 nir_ssa_def *all_same = nir_ieq(b, &tex_all_same->dest.ssa, nir_imm_int(b, 0));
 552                 nir_if *if_stmt = nir_if_create(b->shader);
 553                 if_stmt->condition = nir_src_for_ssa(all_same);
 554                 nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
 555
 556                 b->cursor = nir_after_cf_list(&if_stmt->then_list);
 557                 for (int i = 1; i < samples; i++) {
 558                         nir_tex_instr *tex_add = nir_tex_instr_create(b->shader, 2);
 559                         tex_add->sampler_dim = GLSL_SAMPLER_DIM_MS;
 560                         tex_add->op = nir_texop_txf_ms;
 561                         tex_add->src[0].src_type = nir_tex_src_coord;
 562                         tex_add->src[0].src = nir_src_for_ssa(img_coord);
 563                         tex_add->src[1].src_type = nir_tex_src_ms_index;
 564                         tex_add->src[1].src = nir_src_for_ssa(nir_imm_int(b, i));
 565                         tex_add->dest_type = nir_type_float;
 566                         tex_add->is_array = false;
 567                         tex_add->coord_components = 2;
 568                         tex_add->texture = nir_deref_var_create(tex_add, input_img);
 569                         tex_add->sampler = NULL;
 570
 571                         nir_ssa_dest_init(&tex_add->instr, &tex_add->dest, 4, 32, "tex");
 572                         nir_builder_instr_insert(b, &tex_add->instr);
 573
 574                         tmp = nir_fadd(b, tmp, &tex_add->dest.ssa);
 575                 }
 576
 577                 tmp = nir_fdiv(b, tmp, nir_imm_float(b, samples));
 578                 nir_store_var(b, color, tmp, 0xf);
 579                 b->cursor = nir_after_cf_list(&if_stmt->else_list);
 580                 outer_if = if_stmt;
 581         }
 582         nir_store_var(b, color, &tex->dest.ssa, 0xf);
 583
 584         if (outer_if)
 585                 b->cursor = nir_after_cf_node(&outer_if->cf_node);
 586 }