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
  67         if (state->flags & RADV_META_SAVE_SAMPLE_LOCATIONS) {
  68                 typed_memcpy(&state->sample_location,
  69                              &cmd_buffer->state.dynamic.sample_location, 1);
  70         }
  71
  72         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
  73                 assert(!(state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE));
  74
  75                 state->old_pipeline = cmd_buffer->state.compute_pipeline;
  76         }
  77
  78         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
  79                 state->old_descriptor_set0 = descriptors_state->sets[0];
  80                 if (!(descriptors_state->valid & 1) || !state->old_descriptor_set0)
  81                         state->flags &= ~RADV_META_SAVE_DESCRIPTORS;
  82         }
  83
  84         if (state->flags & RADV_META_SAVE_CONSTANTS) {
  85                 memcpy(state->push_constants, cmd_buffer->push_constants,
  86                        MAX_PUSH_CONSTANTS_SIZE);
  87         }
  88
  89         if (state->flags & RADV_META_SAVE_PASS) {
  90                 state->pass = cmd_buffer->state.pass;
  91                 state->subpass = cmd_buffer->state.subpass;
  92                 state->framebuffer = cmd_buffer->state.framebuffer;
  93                 state->attachments = cmd_buffer->state.attachments;
  94                 state->render_area = cmd_buffer->state.render_area;
  95         }
  96 }
  97
  98 void
  99 radv_meta_restore(const struct radv_meta_saved_state *state,
 100                   struct radv_cmd_buffer *cmd_buffer)
 101 {
 102         VkPipelineBindPoint bind_point =
 103                 state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE ?
 104                         VK_PIPELINE_BIND_POINT_GRAPHICS :
 105                         VK_PIPELINE_BIND_POINT_COMPUTE;
 106
 107         if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE) {
 108                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 109                                      VK_PIPELINE_BIND_POINT_GRAPHICS,
 110                                      radv_pipeline_to_handle(state->old_pipeline));
 111
 112                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_PIPELINE;
 113
 114                 /* Restore all viewports. */
 115                 cmd_buffer->state.dynamic.viewport.count = state->viewport.count;
 116                 typed_memcpy(cmd_buffer->state.dynamic.viewport.viewports,
 117                              state->viewport.viewports,
 118                              MAX_VIEWPORTS);
 119
 120                 /* Restore all scissors. */
 121                 cmd_buffer->state.dynamic.scissor.count = state->scissor.count;
 122                 typed_memcpy(cmd_buffer->state.dynamic.scissor.scissors,
 123                              state->scissor.scissors,
 124                              MAX_SCISSORS);
 125
 126                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_DYNAMIC_VIEWPORT |
 127                                            RADV_CMD_DIRTY_DYNAMIC_SCISSOR;
 128         }
 129
 130         if (state->flags & RADV_META_SAVE_SAMPLE_LOCATIONS) {
 131                 typed_memcpy(&cmd_buffer->state.dynamic.sample_location.locations,
 132                              &state->sample_location.locations, 1);
 133
 134                 cmd_buffer->state.dirty |= RADV_CMD_DIRTY_DYNAMIC_SAMPLE_LOCATIONS;
 135         }
 136
 137         if (state->flags & RADV_META_SAVE_COMPUTE_PIPELINE) {
 138                 radv_CmdBindPipeline(radv_cmd_buffer_to_handle(cmd_buffer),
 139                                      VK_PIPELINE_BIND_POINT_COMPUTE,
 140                                      radv_pipeline_to_handle(state->old_pipeline));
 141         }
 142
 143         if (state->flags & RADV_META_SAVE_DESCRIPTORS) {
 144                 radv_set_descriptor_set(cmd_buffer, bind_point,
 145                                         state->old_descriptor_set0, 0);
 146         }
 147
 148         if (state->flags & RADV_META_SAVE_CONSTANTS) {
 149                 VkShaderStageFlags stages = VK_SHADER_STAGE_COMPUTE_BIT;
 150
 151                 if (state->flags & RADV_META_SAVE_GRAPHICS_PIPELINE)
 152                         stages |= VK_SHADER_STAGE_ALL_GRAPHICS;
 153
 154                 radv_CmdPushConstants(radv_cmd_buffer_to_handle(cmd_buffer),
 155                                       VK_NULL_HANDLE, stages, 0,
 156                                       MAX_PUSH_CONSTANTS_SIZE,
 157                                       state->push_constants);
 158         }
 159
 160         if (state->flags & RADV_META_SAVE_PASS) {
 161                 cmd_buffer->state.pass = state->pass;
 162                 cmd_buffer->state.subpass = state->subpass;
 163                 cmd_buffer->state.framebuffer = state->framebuffer;
 164                 cmd_buffer->state.attachments = state->attachments;
 165                 cmd_buffer->state.render_area = state->render_area;
 166                 if (state->subpass)
 167                         cmd_buffer->state.dirty |= RADV_CMD_DIRTY_FRAMEBUFFER;
 168         }
 169 }
 170
 171 VkImageViewType
 172 radv_meta_get_view_type(const struct radv_image *image)
 173 {
 174         switch (image->type) {
 175         case VK_IMAGE_TYPE_1D: return VK_IMAGE_VIEW_TYPE_1D;
 176         case VK_IMAGE_TYPE_2D: return VK_IMAGE_VIEW_TYPE_2D;
 177         case VK_IMAGE_TYPE_3D: return VK_IMAGE_VIEW_TYPE_3D;
 178         default:
 179                 unreachable("bad VkImageViewType");
 180         }
 181 }
 182
 183 /**
 184  * When creating a destination VkImageView, this function provides the needed
 185  * VkImageViewCreateInfo::subresourceRange::baseArrayLayer.
 186  */
 187 uint32_t
 188 radv_meta_get_iview_layer(const struct radv_image *dest_image,
 189                           const VkImageSubresourceLayers *dest_subresource,
 190                           const VkOffset3D *dest_offset)
 191 {
 192         switch (dest_image->type) {
 193         case VK_IMAGE_TYPE_1D:
 194         case VK_IMAGE_TYPE_2D:
 195                 return dest_subresource->baseArrayLayer;
 196         case VK_IMAGE_TYPE_3D:
 197                 /* HACK: Vulkan does not allow attaching a 3D image to a framebuffer,
 198                  * but meta does it anyway. When doing so, we translate the
 199                  * destination's z offset into an array offset.
 200                  */
 201                 return dest_offset->z;
 202         default:
 203                 assert(!"bad VkImageType");
 204                 return 0;
 205         }
 206 }
 207
 208 static void *
 209 meta_alloc(void* _device, size_t size, size_t alignment,
 210            VkSystemAllocationScope allocationScope)
 211 {
 212         struct radv_device *device = _device;
 213         return device->vk.alloc.pfnAllocation(device->vk.alloc.pUserData, size, alignment,
 214                                            VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 215 }
 216
 217 static void *
 218 meta_realloc(void* _device, void *original, size_t size, size_t alignment,
 219              VkSystemAllocationScope allocationScope)
 220 {
 221         struct radv_device *device = _device;
 222         return device->vk.alloc.pfnReallocation(device->vk.alloc.pUserData, original,
 223                                              size, alignment,
 224                                              VK_SYSTEM_ALLOCATION_SCOPE_DEVICE);
 225 }
 226
 227 static void
 228 meta_free(void* _device, void *data)
 229 {
 230         struct radv_device *device = _device;
 231         return device->vk.alloc.pfnFree(device->vk.alloc.pUserData, data);
 232 }
 233
 234 static bool
 235 radv_builtin_cache_path(char *path)
 236 {
 237         char *xdg_cache_home = getenv("XDG_CACHE_HOME");
 238         const char *suffix = "/radv_builtin_shaders";
 239         const char *suffix2 = "/.cache/radv_builtin_shaders";
 240         struct passwd pwd, *result;
 241         char path2[PATH_MAX + 1]; /* PATH_MAX is not a real max,but suffices here. */
 242         int ret;
 243
 244         if (xdg_cache_home) {
 245                 ret = snprintf(path, PATH_MAX + 1, "%s%s%zd",
 246                                xdg_cache_home, suffix, sizeof(void *) * 8);
 247                 return ret > 0 && ret < PATH_MAX + 1;
 248         }
 249
 250         getpwuid_r(getuid(), &pwd, path2, PATH_MAX - strlen(suffix2), &result);
 251         if (!result)
 252                 return false;
 253
 254         strcpy(path, pwd.pw_dir);
 255         strcat(path, "/.cache");
 256         if (mkdir(path, 0755) && errno != EEXIST)
 257                 return false;
 258
 259         ret = snprintf(path, PATH_MAX + 1, "%s%s%zd",
 260                        pwd.pw_dir, suffix2, sizeof(void *) * 8);
 261         return ret > 0 && ret < PATH_MAX + 1;
 262 }
 263
 264 static bool
 265 radv_load_meta_pipeline(struct radv_device *device)
 266 {
 267         char path[PATH_MAX + 1];
 268         struct stat st;
 269         void *data = NULL;
 270         bool ret = false;
 271
 272         if (!radv_builtin_cache_path(path))
 273                 return false;
 274
 275         int fd = open(path, O_RDONLY);
 276         if (fd < 0)
 277                 return false;
 278         if (fstat(fd, &st))
 279                 goto fail;
 280         data = malloc(st.st_size);
 281         if (!data)
 282                 goto fail;
 283         if(read(fd, data, st.st_size) == -1)
 284                 goto fail;
 285
 286         ret = radv_pipeline_cache_load(&device->meta_state.cache, data, st.st_size);
 287 fail:
 288         free(data);
 289         close(fd);
 290         return ret;
 291 }
 292
 293 static void
 294 radv_store_meta_pipeline(struct radv_device *device)
 295 {
 296         char path[PATH_MAX + 1], path2[PATH_MAX + 7];
 297         size_t size;
 298         void *data = NULL;
 299
 300         if (!device->meta_state.cache.modified)
 301                 return;
 302
 303         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 304                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 305                                       &size, NULL))
 306                 return;
 307
 308         if (!radv_builtin_cache_path(path))
 309                 return;
 310
 311         strcpy(path2, path);
 312         strcat(path2, "XXXXXX");
 313         int fd = mkstemp(path2);//open(path, O_WRONLY | O_CREAT, 0600);
 314         if (fd < 0)
 315                 return;
 316         data = malloc(size);
 317         if (!data)
 318                 goto fail;
 319
 320         if (radv_GetPipelineCacheData(radv_device_to_handle(device),
 321                                       radv_pipeline_cache_to_handle(&device->meta_state.cache),
 322                                       &size, data))
 323                 goto fail;
 324         if(write(fd, data, size) == -1)
 325                 goto fail;
 326
 327         rename(path2, path);
 328 fail:
 329         free(data);
 330         close(fd);
 331         unlink(path2);
 332 }
 333
 334 VkResult
 335 radv_device_init_meta(struct radv_device *device)
 336 {
 337         VkResult result;
 338
 339         memset(&device->meta_state, 0, sizeof(device->meta_state));
 340
 341         device->meta_state.alloc = (VkAllocationCallbacks) {
 342                 .pUserData = device,
 343                 .pfnAllocation = meta_alloc,
 344                 .pfnReallocation = meta_realloc,
 345                 .pfnFree = meta_free,
 346         };
 347
 348         device->meta_state.cache.alloc = device->meta_state.alloc;
 349         radv_pipeline_cache_init(&device->meta_state.cache, device);
 350         bool loaded_cache = radv_load_meta_pipeline(device);
 351         bool on_demand = !loaded_cache;
 352
 353         mtx_init(&device->meta_state.mtx, mtx_plain);
 354
 355         result = radv_device_init_meta_clear_state(device, on_demand);
 356         if (result != VK_SUCCESS)
 357                 goto fail_clear;
 358
 359         result = radv_device_init_meta_resolve_state(device, on_demand);
 360         if (result != VK_SUCCESS)
 361                 goto fail_resolve;
 362
 363         result = radv_device_init_meta_blit_state(device, on_demand);
 364         if (result != VK_SUCCESS)
 365                 goto fail_blit;
 366
 367         result = radv_device_init_meta_blit2d_state(device, on_demand);
 368         if (result != VK_SUCCESS)
 369                 goto fail_blit2d;
 370
 371         result = radv_device_init_meta_bufimage_state(device);
 372         if (result != VK_SUCCESS)
 373                 goto fail_bufimage;
 374
 375         result = radv_device_init_meta_depth_decomp_state(device, on_demand);
 376         if (result != VK_SUCCESS)
 377                 goto fail_depth_decomp;
 378
 379         result = radv_device_init_meta_buffer_state(device);
 380         if (result != VK_SUCCESS)
 381                 goto fail_buffer;
 382
 383         result = radv_device_init_meta_query_state(device, on_demand);
 384         if (result != VK_SUCCESS)
 385                 goto fail_query;
 386
 387         result = radv_device_init_meta_fast_clear_flush_state(device, on_demand);
 388         if (result != VK_SUCCESS)
 389                 goto fail_fast_clear;
 390
 391         result = radv_device_init_meta_resolve_compute_state(device, on_demand);
 392         if (result != VK_SUCCESS)
 393                 goto fail_resolve_compute;
 394
 395         result = radv_device_init_meta_resolve_fragment_state(device, on_demand);
 396         if (result != VK_SUCCESS)
 397                 goto fail_resolve_fragment;
 398
 399         result = radv_device_init_meta_fmask_expand_state(device);
 400         if (result != VK_SUCCESS)
 401                 goto fail_fmask_expand;
 402
 403         return VK_SUCCESS;
 404
 405 fail_fmask_expand:
 406         radv_device_finish_meta_resolve_fragment_state(device);
 407 fail_resolve_fragment:
 408         radv_device_finish_meta_resolve_compute_state(device);
 409 fail_resolve_compute:
 410         radv_device_finish_meta_fast_clear_flush_state(device);
 411 fail_fast_clear:
 412         radv_device_finish_meta_query_state(device);
 413 fail_query:
 414         radv_device_finish_meta_buffer_state(device);
 415 fail_buffer:
 416         radv_device_finish_meta_depth_decomp_state(device);
 417 fail_depth_decomp:
 418         radv_device_finish_meta_bufimage_state(device);
 419 fail_bufimage:
 420         radv_device_finish_meta_blit2d_state(device);
 421 fail_blit2d:
 422         radv_device_finish_meta_blit_state(device);
 423 fail_blit:
 424         radv_device_finish_meta_resolve_state(device);
 425 fail_resolve:
 426         radv_device_finish_meta_clear_state(device);
 427 fail_clear:
 428         mtx_destroy(&device->meta_state.mtx);
 429         radv_pipeline_cache_finish(&device->meta_state.cache);
 430         return result;
 431 }
 432
 433 void
 434 radv_device_finish_meta(struct radv_device *device)
 435 {
 436         radv_device_finish_meta_clear_state(device);
 437         radv_device_finish_meta_resolve_state(device);
 438         radv_device_finish_meta_blit_state(device);
 439         radv_device_finish_meta_blit2d_state(device);
 440         radv_device_finish_meta_bufimage_state(device);
 441         radv_device_finish_meta_depth_decomp_state(device);
 442         radv_device_finish_meta_query_state(device);
 443         radv_device_finish_meta_buffer_state(device);
 444         radv_device_finish_meta_fast_clear_flush_state(device);
 445         radv_device_finish_meta_resolve_compute_state(device);
 446         radv_device_finish_meta_resolve_fragment_state(device);
 447         radv_device_finish_meta_fmask_expand_state(device);
 448
 449         radv_store_meta_pipeline(device);
 450         radv_pipeline_cache_finish(&device->meta_state.cache);
 451         mtx_destroy(&device->meta_state.mtx);
 452 }
 453
 454 nir_ssa_def *radv_meta_gen_rect_vertices_comp2(nir_builder *vs_b, nir_ssa_def *comp2)
 455 {
 456
 457         nir_intrinsic_instr *vertex_id = nir_intrinsic_instr_create(vs_b->shader, nir_intrinsic_load_vertex_id_zero_base);
 458         nir_ssa_dest_init(&vertex_id->instr, &vertex_id->dest, 1, 32, "vertexid");
 459         nir_builder_instr_insert(vs_b, &vertex_id->instr);
 460
 461         /* vertex 0 - -1.0, -1.0 */
 462         /* vertex 1 - -1.0, 1.0 */
 463         /* vertex 2 - 1.0, -1.0 */
 464         /* so channel 0 is vertex_id != 2 ? -1.0 : 1.0
 465            channel 1 is vertex id != 1 ? -1.0 : 1.0 */
 466
 467         nir_ssa_def *c0cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 468                                      nir_imm_int(vs_b, 2));
 469         nir_ssa_def *c1cmp = nir_ine(vs_b, &vertex_id->dest.ssa,
 470                                      nir_imm_int(vs_b, 1));
 471
 472         nir_ssa_def *comp[4];
 473         comp[0] = nir_bcsel(vs_b, c0cmp,
 474                             nir_imm_float(vs_b, -1.0),
 475                             nir_imm_float(vs_b, 1.0));
 476
 477         comp[1] = nir_bcsel(vs_b, c1cmp,
 478                             nir_imm_float(vs_b, -1.0),
 479                             nir_imm_float(vs_b, 1.0));
 480         comp[2] = comp2;
 481         comp[3] = nir_imm_float(vs_b, 1.0);
 482         nir_ssa_def *outvec = nir_vec(vs_b, comp, 4);
 483
 484         return outvec;
 485 }
 486
 487 nir_ssa_def *radv_meta_gen_rect_vertices(nir_builder *vs_b)
 488 {
 489         return radv_meta_gen_rect_vertices_comp2(vs_b, nir_imm_float(vs_b, 0.0));
 490 }
 491
 492 /* vertex shader that generates vertices */
 493 nir_shader *
 494 radv_meta_build_nir_vs_generate_vertices(void)
 495 {
 496         const struct glsl_type *vec4 = glsl_vec4_type();
 497
 498         nir_builder b;
 499         nir_variable *v_position;
 500
 501         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_VERTEX, NULL);
 502         b.shader->info.name = ralloc_strdup(b.shader, "meta_vs_gen_verts");
 503
 504         nir_ssa_def *outvec = radv_meta_gen_rect_vertices(&b);
 505
 506         v_position = nir_variable_create(b.shader, nir_var_shader_out, vec4,
 507                                          "gl_Position");
 508         v_position->data.location = VARYING_SLOT_POS;
 509
 510         nir_store_var(&b, v_position, outvec, 0xf);
 511
 512         return b.shader;
 513 }
 514
 515 nir_shader *
 516 radv_meta_build_nir_fs_noop(void)
 517 {
 518         nir_builder b;
 519
 520         nir_builder_init_simple_shader(&b, NULL, MESA_SHADER_FRAGMENT, NULL);
 521         b.shader->info.name = ralloc_asprintf(b.shader,
 522                                                "meta_noop_fs");
 523
 524         return b.shader;
 525 }
 526
 527 void radv_meta_build_resolve_shader_core(nir_builder *b,
 528                                          bool is_integer,
 529                                          int samples,
 530                                          nir_variable *input_img,
 531                                          nir_variable *color,
 532                                          nir_ssa_def *img_coord)
 533 {
 534         /* do a txf_ms on each sample */
 535         nir_ssa_def *tmp;
 536         nir_if *outer_if = NULL;
 537
 538         nir_ssa_def *input_img_deref = &nir_build_deref_var(b, input_img)->dest.ssa;
 539
 540         nir_tex_instr *tex = nir_tex_instr_create(b->shader, 3);
 541         tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
 542         tex->op = nir_texop_txf_ms;
 543         tex->src[0].src_type = nir_tex_src_coord;
 544         tex->src[0].src = nir_src_for_ssa(img_coord);
 545         tex->src[1].src_type = nir_tex_src_ms_index;
 546         tex->src[1].src = nir_src_for_ssa(nir_imm_int(b, 0));
 547         tex->src[2].src_type = nir_tex_src_texture_deref;
 548         tex->src[2].src = nir_src_for_ssa(input_img_deref);
 549         tex->dest_type = nir_type_float;
 550         tex->is_array = false;
 551         tex->coord_components = 2;
 552
 553         nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, "tex");
 554         nir_builder_instr_insert(b, &tex->instr);
 555
 556         tmp = &tex->dest.ssa;
 557
 558         if (!is_integer && samples > 1) {
 559                 nir_tex_instr *tex_all_same = nir_tex_instr_create(b->shader, 2);
 560                 tex_all_same->sampler_dim = GLSL_SAMPLER_DIM_MS;
 561                 tex_all_same->op = nir_texop_samples_identical;
 562                 tex_all_same->src[0].src_type = nir_tex_src_coord;
 563                 tex_all_same->src[0].src = nir_src_for_ssa(img_coord);
 564                 tex_all_same->src[1].src_type = nir_tex_src_texture_deref;
 565                 tex_all_same->src[1].src = nir_src_for_ssa(input_img_deref);
 566                 tex_all_same->dest_type = nir_type_float;
 567                 tex_all_same->is_array = false;
 568                 tex_all_same->coord_components = 2;
 569
 570                 nir_ssa_dest_init(&tex_all_same->instr, &tex_all_same->dest, 1, 32, "tex");
 571                 nir_builder_instr_insert(b, &tex_all_same->instr);
 572
 573                 nir_ssa_def *all_same = nir_ieq(b, &tex_all_same->dest.ssa, nir_imm_int(b, 0));
 574                 nir_if *if_stmt = nir_if_create(b->shader);
 575                 if_stmt->condition = nir_src_for_ssa(all_same);
 576                 nir_cf_node_insert(b->cursor, &if_stmt->cf_node);
 577
 578                 b->cursor = nir_after_cf_list(&if_stmt->then_list);
 579                 for (int i = 1; i < samples; i++) {
 580                         nir_tex_instr *tex_add = nir_tex_instr_create(b->shader, 3);
 581                         tex_add->sampler_dim = GLSL_SAMPLER_DIM_MS;
 582                         tex_add->op = nir_texop_txf_ms;
 583                         tex_add->src[0].src_type = nir_tex_src_coord;
 584                         tex_add->src[0].src = nir_src_for_ssa(img_coord);
 585                         tex_add->src[1].src_type = nir_tex_src_ms_index;
 586                         tex_add->src[1].src = nir_src_for_ssa(nir_imm_int(b, i));
 587                         tex_add->src[2].src_type = nir_tex_src_texture_deref;
 588                         tex_add->src[2].src = nir_src_for_ssa(input_img_deref);
 589                         tex_add->dest_type = nir_type_float;
 590                         tex_add->is_array = false;
 591                         tex_add->coord_components = 2;
 592
 593                         nir_ssa_dest_init(&tex_add->instr, &tex_add->dest, 4, 32, "tex");
 594                         nir_builder_instr_insert(b, &tex_add->instr);
 595
 596                         tmp = nir_fadd(b, tmp, &tex_add->dest.ssa);
 597                 }
 598
 599                 tmp = nir_fdiv(b, tmp, nir_imm_float(b, samples));
 600                 nir_store_var(b, color, tmp, 0xf);
 601                 b->cursor = nir_after_cf_list(&if_stmt->else_list);
 602                 outer_if = if_stmt;
 603         }
 604         nir_store_var(b, color, &tex->dest.ssa, 0xf);
 605
 606         if (outer_if)
 607                 b->cursor = nir_after_cf_node(&outer_if->cf_node);
 608 }