src/mesa/drivers/dri/i965/brw_state_upload.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics to
   4  develop this 3D driver.
   5
   6  Permission is hereby granted, free of charge, to any person obtaining
   7  a copy of this software and associated documentation files (the
   8  "Software"), to deal in the Software without restriction, including
   9  without limitation the rights to use, copy, modify, merge, publish,
  10  distribute, sublicense, and/or sell copies of the Software, and to
  11  permit persons to whom the Software is furnished to do so, subject to
  12  the following conditions:
  13
  14  The above copyright notice and this permission notice (including the
  15  next paragraph) shall be included in all copies or substantial
  16  portions of the Software.
  17
  18  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25
  26  **********************************************************************/
  27  /*
  28   * Authors:
  29   *   Keith Whitwell <keithw@vmware.com>
  30   */
  31
  32
  33
  34 #include "brw_context.h"
  35 #include "brw_state.h"
  36 #include "drivers/common/meta.h"
  37 #include "intel_batchbuffer.h"
  38 #include "intel_buffers.h"
  39
  40 static const struct brw_tracked_state *gen4_atoms[] =
  41 {
  42    &brw_vs_prog, /* must do before GS prog, state base address. */
  43    &brw_ff_gs_prog, /* must do before state base address */
  44
  45    &brw_interpolation_map,
  46
  47    &brw_clip_prog, /* must do before state base address */
  48    &brw_sf_prog, /* must do before state base address */
  49    &brw_wm_prog, /* must do before state base address */
  50
  51    /* Once all the programs are done, we know how large urb entry
  52     * sizes need to be and can decide if we need to change the urb
  53     * layout.
  54     */
  55    &brw_curbe_offsets,
  56    &brw_recalculate_urb_fence,
  57
  58    &brw_cc_vp,
  59    &brw_cc_unit,
  60
  61    /* Surface state setup.  Must come before the VS/WM unit.  The binding
  62     * table upload must be last.
  63     */
  64    &brw_vs_pull_constants,
  65    &brw_wm_pull_constants,
  66    &brw_renderbuffer_surfaces,
  67    &brw_texture_surfaces,
  68    &brw_vs_binding_table,
  69    &brw_wm_binding_table,
  70
  71    &brw_fs_samplers,
  72    &brw_vs_samplers,
  73
  74    /* These set up state for brw_psp_urb_cbs */
  75    &brw_wm_unit,
  76    &brw_sf_vp,
  77    &brw_sf_unit,
  78    &brw_vs_unit,                /* always required, enabled or not */
  79    &brw_clip_unit,
  80    &brw_gs_unit,
  81
  82    /* Command packets:
  83     */
  84    &brw_invariant_state,
  85    &brw_state_base_address,
  86
  87    &brw_binding_table_pointers,
  88    &brw_blend_constant_color,
  89
  90    &brw_depthbuffer,
  91
  92    &brw_polygon_stipple,
  93    &brw_polygon_stipple_offset,
  94
  95    &brw_line_stipple,
  96    &brw_aa_line_parameters,
  97
  98    &brw_psp_urb_cbs,
  99
 100    &brw_drawing_rect,
 101    &brw_indices,
 102    &brw_index_buffer,
 103    &brw_vertices,
 104
 105    &brw_constant_buffer
 106 };
 107
 108 static const struct brw_tracked_state *gen6_atoms[] =
 109 {
 110    &brw_vs_prog, /* must do before state base address */
 111    &brw_ff_gs_prog, /* must do before state base address */
 112    &brw_wm_prog, /* must do before state base address */
 113
 114    &gen6_clip_vp,
 115    &gen6_sf_vp,
 116
 117    /* Command packets: */
 118
 119    /* must do before binding table pointers, cc state ptrs */
 120    &brw_state_base_address,
 121
 122    &brw_cc_vp,
 123    &gen6_viewport_state,        /* must do after *_vp stages */
 124
 125    &gen6_urb,
 126    &gen6_blend_state,           /* must do before cc unit */
 127    &gen6_color_calc_state,      /* must do before cc unit */
 128    &gen6_depth_stencil_state,   /* must do before cc unit */
 129
 130    &gen6_vs_push_constants, /* Before vs_state */
 131    &gen6_wm_push_constants, /* Before wm_state */
 132
 133    /* Surface state setup.  Must come before the VS/WM unit.  The binding
 134     * table upload must be last.
 135     */
 136    &brw_vs_pull_constants,
 137    &brw_vs_ubo_surfaces,
 138    &brw_wm_pull_constants,
 139    &brw_wm_ubo_surfaces,
 140    &gen6_renderbuffer_surfaces,
 141    &brw_texture_surfaces,
 142    &gen6_sol_surface,
 143    &brw_vs_binding_table,
 144    &gen6_gs_binding_table,
 145    &brw_wm_binding_table,
 146
 147    &brw_fs_samplers,
 148    &brw_vs_samplers,
 149    &gen6_sampler_state,
 150    &gen6_multisample_state,
 151
 152    &gen6_vs_state,
 153    &gen6_gs_state,
 154    &gen6_clip_state,
 155    &gen6_sf_state,
 156    &gen6_wm_state,
 157
 158    &gen6_scissor_state,
 159
 160    &gen6_binding_table_pointers,
 161
 162    &brw_depthbuffer,
 163
 164    &brw_polygon_stipple,
 165    &brw_polygon_stipple_offset,
 166
 167    &brw_line_stipple,
 168    &brw_aa_line_parameters,
 169
 170    &brw_drawing_rect,
 171
 172    &brw_indices,
 173    &brw_index_buffer,
 174    &brw_vertices,
 175 };
 176
 177 static const struct brw_tracked_state *gen7_atoms[] =
 178 {
 179    &brw_vs_prog,
 180    &brw_gs_prog,
 181    &brw_wm_prog,
 182
 183    /* Command packets: */
 184
 185    /* must do before binding table pointers, cc state ptrs */
 186    &brw_state_base_address,
 187
 188    &brw_cc_vp,
 189    &gen7_cc_viewport_state_pointer, /* must do after brw_cc_vp */
 190    &gen7_sf_clip_viewport,
 191
 192    &gen7_push_constant_space,
 193    &gen7_urb,
 194    &gen6_blend_state,           /* must do before cc unit */
 195    &gen6_color_calc_state,      /* must do before cc unit */
 196    &gen6_depth_stencil_state,   /* must do before cc unit */
 197
 198    &gen6_vs_push_constants, /* Before vs_state */
 199    &gen7_gs_push_constants, /* Before gs_state */
 200    &gen6_wm_push_constants, /* Before wm_surfaces and constant_buffer */
 201
 202    /* Surface state setup.  Must come before the VS/WM unit.  The binding
 203     * table upload must be last.
 204     */
 205    &brw_vs_pull_constants,
 206    &brw_vs_ubo_surfaces,
 207    &brw_vs_abo_surfaces,
 208    &brw_gs_pull_constants,
 209    &brw_gs_ubo_surfaces,
 210    &brw_gs_abo_surfaces,
 211    &brw_wm_pull_constants,
 212    &brw_wm_ubo_surfaces,
 213    &brw_wm_abo_surfaces,
 214    &gen6_renderbuffer_surfaces,
 215    &brw_texture_surfaces,
 216    &brw_vs_binding_table,
 217    &brw_gs_binding_table,
 218    &brw_wm_binding_table,
 219
 220    &brw_fs_samplers,
 221    &brw_vs_samplers,
 222    &brw_gs_samplers,
 223    &gen6_multisample_state,
 224
 225    &gen7_disable_stages,
 226    &gen7_vs_state,
 227    &gen7_gs_state,
 228    &gen7_sol_state,
 229    &gen7_clip_state,
 230    &gen7_sbe_state,
 231    &gen7_sf_state,
 232    &gen7_wm_state,
 233    &gen7_ps_state,
 234
 235    &gen6_scissor_state,
 236
 237    &gen7_depthbuffer,
 238
 239    &brw_polygon_stipple,
 240    &brw_polygon_stipple_offset,
 241
 242    &brw_line_stipple,
 243    &brw_aa_line_parameters,
 244
 245    &brw_drawing_rect,
 246
 247    &brw_indices,
 248    &brw_index_buffer,
 249    &brw_vertices,
 250
 251    &haswell_cut_index,
 252 };
 253
 254 static const struct brw_tracked_state *gen8_atoms[] =
 255 {
 256    &brw_vs_prog,
 257    &brw_gs_prog,
 258    &brw_wm_prog,
 259
 260    /* Command packets: */
 261    &gen8_state_base_address,
 262
 263    &brw_cc_vp,
 264    &gen7_cc_viewport_state_pointer, /* must do after brw_cc_vp */
 265    &gen8_sf_clip_viewport,
 266
 267    &gen7_push_constant_space,
 268    &gen7_urb,
 269    &gen8_blend_state,
 270    &gen6_color_calc_state,
 271
 272    &gen6_vs_push_constants, /* Before vs_state */
 273    &gen7_gs_push_constants, /* Before gs_state */
 274    &gen6_wm_push_constants, /* Before wm_surfaces and constant_buffer */
 275
 276    /* Surface state setup.  Must come before the VS/WM unit.  The binding
 277     * table upload must be last.
 278     */
 279    &brw_vs_pull_constants,
 280    &brw_vs_ubo_surfaces,
 281    &brw_vs_abo_surfaces,
 282    &brw_gs_pull_constants,
 283    &brw_gs_ubo_surfaces,
 284    &brw_gs_abo_surfaces,
 285    &brw_wm_pull_constants,
 286    &brw_wm_ubo_surfaces,
 287    &brw_wm_abo_surfaces,
 288    &gen6_renderbuffer_surfaces,
 289    &brw_texture_surfaces,
 290    &brw_vs_binding_table,
 291    &brw_gs_binding_table,
 292    &brw_wm_binding_table,
 293
 294    &brw_fs_samplers,
 295    &brw_vs_samplers,
 296    &brw_gs_samplers,
 297    &gen8_multisample_state,
 298
 299    &gen8_disable_stages,
 300    &gen8_vs_state,
 301    &gen8_gs_state,
 302    &gen8_sol_state,
 303    &gen6_clip_state,
 304    &gen8_raster_state,
 305    &gen8_sbe_state,
 306    &gen8_sf_state,
 307    &gen8_ps_blend,
 308    &gen8_ps_extra,
 309    &gen8_ps_state,
 310    &gen8_wm_depth_stencil,
 311    &gen8_wm_state,
 312
 313    &gen6_scissor_state,
 314
 315    &gen7_depthbuffer,
 316
 317    &brw_polygon_stipple,
 318    &brw_polygon_stipple_offset,
 319
 320    &brw_line_stipple,
 321    &brw_aa_line_parameters,
 322
 323    &brw_drawing_rect,
 324
 325    &gen8_vf_topology,
 326
 327    &brw_indices,
 328    &gen8_index_buffer,
 329    &gen8_vertices,
 330
 331    &haswell_cut_index,
 332 };
 333
 334 static void
 335 brw_upload_initial_gpu_state(struct brw_context *brw)
 336 {
 337    /* On platforms with hardware contexts, we can set our initial GPU state
 338     * right away rather than doing it via state atoms.  This saves a small
 339     * amount of overhead on every draw call.
 340     */
 341    if (!brw->hw_ctx)
 342       return;
 343
 344    brw_upload_invariant_state(brw);
 345
 346    if (brw->gen >= 8) {
 347       gen8_emit_3dstate_sample_pattern(brw);
 348    }
 349 }
 350
 351 void brw_init_state( struct brw_context *brw )
 352 {
 353    struct gl_context *ctx = &brw->ctx;
 354    const struct brw_tracked_state **atoms;
 355    int num_atoms;
 356
 357    brw_init_caches(brw);
 358
 359    if (brw->gen >= 8) {
 360       atoms = gen8_atoms;
 361       num_atoms = ARRAY_SIZE(gen8_atoms);
 362    } else if (brw->gen == 7) {
 363       atoms = gen7_atoms;
 364       num_atoms = ARRAY_SIZE(gen7_atoms);
 365    } else if (brw->gen == 6) {
 366       atoms = gen6_atoms;
 367       num_atoms = ARRAY_SIZE(gen6_atoms);
 368    } else {
 369       atoms = gen4_atoms;
 370       num_atoms = ARRAY_SIZE(gen4_atoms);
 371    }
 372
 373    brw->atoms = atoms;
 374    brw->num_atoms = num_atoms;
 375
 376    while (num_atoms--) {
 377       assert((*atoms)->dirty.mesa |
 378              (*atoms)->dirty.brw |
 379              (*atoms)->dirty.cache);
 380       assert((*atoms)->emit);
 381       atoms++;
 382    }
 383
 384    brw_upload_initial_gpu_state(brw);
 385
 386    brw->state.dirty.mesa = ~0;
 387    brw->state.dirty.brw = ~0;
 388
 389    /* Make sure that brw->state.dirty.brw has enough bits to hold all possible
 390     * dirty flags.
 391     */
 392    STATIC_ASSERT(BRW_NUM_STATE_BITS <= 8 * sizeof(brw->state.dirty.brw));
 393
 394    ctx->DriverFlags.NewTransformFeedback = BRW_NEW_TRANSFORM_FEEDBACK;
 395    ctx->DriverFlags.NewTransformFeedbackProg = BRW_NEW_TRANSFORM_FEEDBACK;
 396    ctx->DriverFlags.NewRasterizerDiscard = BRW_NEW_RASTERIZER_DISCARD;
 397    ctx->DriverFlags.NewUniformBuffer = BRW_NEW_UNIFORM_BUFFER;
 398    ctx->DriverFlags.NewAtomicBuffer = BRW_NEW_ATOMIC_BUFFER;
 399 }
 400
 401
 402 void brw_destroy_state( struct brw_context *brw )
 403 {
 404    brw_destroy_caches(brw);
 405 }
 406
 407 /***********************************************************************
 408  */
 409
 410 static bool
 411 check_state(const struct brw_state_flags *a, const struct brw_state_flags *b)
 412 {
 413    return ((a->mesa & b->mesa) |
 414            (a->brw & b->brw) |
 415            (a->cache & b->cache)) != 0;
 416 }
 417
 418 static void accumulate_state( struct brw_state_flags *a,
 419                               const struct brw_state_flags *b )
 420 {
 421    a->mesa |= b->mesa;
 422    a->brw |= b->brw;
 423    a->cache |= b->cache;
 424 }
 425
 426
 427 static void xor_states( struct brw_state_flags *result,
 428                              const struct brw_state_flags *a,
 429                               const struct brw_state_flags *b )
 430 {
 431    result->mesa = a->mesa ^ b->mesa;
 432    result->brw = a->brw ^ b->brw;
 433    result->cache = a->cache ^ b->cache;
 434 }
 435
 436 struct dirty_bit_map {
 437    uint32_t bit;
 438    char *name;
 439    uint32_t count;
 440 };
 441
 442 #define DEFINE_BIT(name) {name, #name, 0}
 443
 444 static struct dirty_bit_map mesa_bits[] = {
 445    DEFINE_BIT(_NEW_MODELVIEW),
 446    DEFINE_BIT(_NEW_PROJECTION),
 447    DEFINE_BIT(_NEW_TEXTURE_MATRIX),
 448    DEFINE_BIT(_NEW_COLOR),
 449    DEFINE_BIT(_NEW_DEPTH),
 450    DEFINE_BIT(_NEW_EVAL),
 451    DEFINE_BIT(_NEW_FOG),
 452    DEFINE_BIT(_NEW_HINT),
 453    DEFINE_BIT(_NEW_LIGHT),
 454    DEFINE_BIT(_NEW_LINE),
 455    DEFINE_BIT(_NEW_PIXEL),
 456    DEFINE_BIT(_NEW_POINT),
 457    DEFINE_BIT(_NEW_POLYGON),
 458    DEFINE_BIT(_NEW_POLYGONSTIPPLE),
 459    DEFINE_BIT(_NEW_SCISSOR),
 460    DEFINE_BIT(_NEW_STENCIL),
 461    DEFINE_BIT(_NEW_TEXTURE),
 462    DEFINE_BIT(_NEW_TRANSFORM),
 463    DEFINE_BIT(_NEW_VIEWPORT),
 464    DEFINE_BIT(_NEW_ARRAY),
 465    DEFINE_BIT(_NEW_RENDERMODE),
 466    DEFINE_BIT(_NEW_BUFFERS),
 467    DEFINE_BIT(_NEW_CURRENT_ATTRIB),
 468    DEFINE_BIT(_NEW_MULTISAMPLE),
 469    DEFINE_BIT(_NEW_TRACK_MATRIX),
 470    DEFINE_BIT(_NEW_PROGRAM),
 471    DEFINE_BIT(_NEW_PROGRAM_CONSTANTS),
 472    DEFINE_BIT(_NEW_BUFFER_OBJECT),
 473    DEFINE_BIT(_NEW_FRAG_CLAMP),
 474    DEFINE_BIT(_NEW_VARYING_VP_INPUTS),
 475    {0, 0, 0}
 476 };
 477
 478 static struct dirty_bit_map brw_bits[] = {
 479    DEFINE_BIT(BRW_NEW_URB_FENCE),
 480    DEFINE_BIT(BRW_NEW_FRAGMENT_PROGRAM),
 481    DEFINE_BIT(BRW_NEW_GEOMETRY_PROGRAM),
 482    DEFINE_BIT(BRW_NEW_VERTEX_PROGRAM),
 483    DEFINE_BIT(BRW_NEW_CURBE_OFFSETS),
 484    DEFINE_BIT(BRW_NEW_REDUCED_PRIMITIVE),
 485    DEFINE_BIT(BRW_NEW_PRIMITIVE),
 486    DEFINE_BIT(BRW_NEW_CONTEXT),
 487    DEFINE_BIT(BRW_NEW_PSP),
 488    DEFINE_BIT(BRW_NEW_SURFACES),
 489    DEFINE_BIT(BRW_NEW_VS_BINDING_TABLE),
 490    DEFINE_BIT(BRW_NEW_GS_BINDING_TABLE),
 491    DEFINE_BIT(BRW_NEW_PS_BINDING_TABLE),
 492    DEFINE_BIT(BRW_NEW_INDICES),
 493    DEFINE_BIT(BRW_NEW_VERTICES),
 494    DEFINE_BIT(BRW_NEW_BATCH),
 495    DEFINE_BIT(BRW_NEW_INDEX_BUFFER),
 496    DEFINE_BIT(BRW_NEW_VS_CONSTBUF),
 497    DEFINE_BIT(BRW_NEW_GS_CONSTBUF),
 498    DEFINE_BIT(BRW_NEW_PROGRAM_CACHE),
 499    DEFINE_BIT(BRW_NEW_STATE_BASE_ADDRESS),
 500    DEFINE_BIT(BRW_NEW_VUE_MAP_VS),
 501    DEFINE_BIT(BRW_NEW_VUE_MAP_GEOM_OUT),
 502    DEFINE_BIT(BRW_NEW_TRANSFORM_FEEDBACK),
 503    DEFINE_BIT(BRW_NEW_RASTERIZER_DISCARD),
 504    DEFINE_BIT(BRW_NEW_STATS_WM),
 505    DEFINE_BIT(BRW_NEW_UNIFORM_BUFFER),
 506    DEFINE_BIT(BRW_NEW_ATOMIC_BUFFER),
 507    DEFINE_BIT(BRW_NEW_META_IN_PROGRESS),
 508    DEFINE_BIT(BRW_NEW_INTERPOLATION_MAP),
 509    DEFINE_BIT(BRW_NEW_PUSH_CONSTANT_ALLOCATION),
 510    {0, 0, 0}
 511 };
 512
 513 static struct dirty_bit_map cache_bits[] = {
 514    DEFINE_BIT(CACHE_NEW_CC_VP),
 515    DEFINE_BIT(CACHE_NEW_CC_UNIT),
 516    DEFINE_BIT(CACHE_NEW_WM_PROG),
 517    DEFINE_BIT(CACHE_NEW_BLORP_BLIT_PROG),
 518    DEFINE_BIT(CACHE_NEW_BLORP_CONST_COLOR_PROG),
 519    DEFINE_BIT(CACHE_NEW_SAMPLER),
 520    DEFINE_BIT(CACHE_NEW_WM_UNIT),
 521    DEFINE_BIT(CACHE_NEW_SF_PROG),
 522    DEFINE_BIT(CACHE_NEW_SF_VP),
 523    DEFINE_BIT(CACHE_NEW_SF_UNIT),
 524    DEFINE_BIT(CACHE_NEW_VS_UNIT),
 525    DEFINE_BIT(CACHE_NEW_VS_PROG),
 526    DEFINE_BIT(CACHE_NEW_FF_GS_UNIT),
 527    DEFINE_BIT(CACHE_NEW_FF_GS_PROG),
 528    DEFINE_BIT(CACHE_NEW_GS_PROG),
 529    DEFINE_BIT(CACHE_NEW_CLIP_VP),
 530    DEFINE_BIT(CACHE_NEW_CLIP_UNIT),
 531    DEFINE_BIT(CACHE_NEW_CLIP_PROG),
 532    {0, 0, 0}
 533 };
 534
 535
 536 static void
 537 brw_update_dirty_count(struct dirty_bit_map *bit_map, int32_t bits)
 538 {
 539    int i;
 540
 541    for (i = 0; i < 32; i++) {
 542       if (bit_map[i].bit == 0)
 543          return;
 544
 545       if (bit_map[i].bit & bits)
 546          bit_map[i].count++;
 547    }
 548 }
 549
 550 static void
 551 brw_print_dirty_count(struct dirty_bit_map *bit_map)
 552 {
 553    int i;
 554
 555    for (i = 0; i < 32; i++) {
 556       if (bit_map[i].bit == 0)
 557          return;
 558
 559       fprintf(stderr, "0x%08x: %12d (%s)\n",
 560               bit_map[i].bit, bit_map[i].count, bit_map[i].name);
 561    }
 562 }
 563
 564 /***********************************************************************
 565  * Emit all state:
 566  */
 567 void brw_upload_state(struct brw_context *brw)
 568 {
 569    struct gl_context *ctx = &brw->ctx;
 570    struct brw_state_flags *state = &brw->state.dirty;
 571    int i;
 572    static int dirty_count = 0;
 573
 574    state->mesa |= brw->NewGLState;
 575    brw->NewGLState = 0;
 576
 577    state->brw |= ctx->NewDriverState;
 578    ctx->NewDriverState = 0;
 579
 580    if (0) {
 581       /* Always re-emit all state. */
 582       state->mesa |= ~0;
 583       state->brw |= ~0;
 584       state->cache |= ~0;
 585    }
 586
 587    if (brw->fragment_program != ctx->FragmentProgram._Current) {
 588       brw->fragment_program = ctx->FragmentProgram._Current;
 589       brw->state.dirty.brw |= BRW_NEW_FRAGMENT_PROGRAM;
 590    }
 591
 592    if (brw->geometry_program != ctx->GeometryProgram._Current) {
 593       brw->geometry_program = ctx->GeometryProgram._Current;
 594       brw->state.dirty.brw |= BRW_NEW_GEOMETRY_PROGRAM;
 595    }
 596
 597    if (brw->vertex_program != ctx->VertexProgram._Current) {
 598       brw->vertex_program = ctx->VertexProgram._Current;
 599       brw->state.dirty.brw |= BRW_NEW_VERTEX_PROGRAM;
 600    }
 601
 602    if (brw->meta_in_progress != _mesa_meta_in_progress(ctx)) {
 603       brw->meta_in_progress = _mesa_meta_in_progress(ctx);
 604       brw->state.dirty.brw |= BRW_NEW_META_IN_PROGRESS;
 605    }
 606
 607    if ((state->mesa | state->cache | state->brw) == 0)
 608       return;
 609
 610    if (unlikely(INTEL_DEBUG)) {
 611       /* Debug version which enforces various sanity checks on the
 612        * state flags which are generated and checked to help ensure
 613        * state atoms are ordered correctly in the list.
 614        */
 615       struct brw_state_flags examined, prev;
 616       memset(&examined, 0, sizeof(examined));
 617       prev = *state;
 618
 619       for (i = 0; i < brw->num_atoms; i++) {
 620          const struct brw_tracked_state *atom = brw->atoms[i];
 621          struct brw_state_flags generated;
 622
 623          if (check_state(state, &atom->dirty)) {
 624             atom->emit(brw);
 625          }
 626
 627          accumulate_state(&examined, &atom->dirty);
 628
 629          /* generated = (prev ^ state)
 630           * if (examined & generated)
 631           *     fail;
 632           */
 633          xor_states(&generated, &prev, state);
 634          assert(!check_state(&examined, &generated));
 635          prev = *state;
 636       }
 637    }
 638    else {
 639       for (i = 0; i < brw->num_atoms; i++) {
 640          const struct brw_tracked_state *atom = brw->atoms[i];
 641
 642          if (check_state(state, &atom->dirty)) {
 643             atom->emit(brw);
 644          }
 645       }
 646    }
 647
 648    if (unlikely(INTEL_DEBUG & DEBUG_STATE)) {
 649       STATIC_ASSERT(ARRAY_SIZE(brw_bits) == BRW_NUM_STATE_BITS + 1);
 650       STATIC_ASSERT(ARRAY_SIZE(cache_bits) == BRW_MAX_CACHE + 1);
 651
 652       brw_update_dirty_count(mesa_bits, state->mesa);
 653       brw_update_dirty_count(brw_bits, state->brw);
 654       brw_update_dirty_count(cache_bits, state->cache);
 655       if (dirty_count++ % 1000 == 0) {
 656          brw_print_dirty_count(mesa_bits);
 657          brw_print_dirty_count(brw_bits);
 658          brw_print_dirty_count(cache_bits);
 659          fprintf(stderr, "\n");
 660       }
 661    }
 662 }
 663
 664
 665 /**
 666  * Clear dirty bits to account for the fact that the state emitted by
 667  * brw_upload_state() has been committed to the hardware.  This is a separate
 668  * call from brw_upload_state() because it's possible that after the call to
 669  * brw_upload_state(), we will discover that we've run out of aperture space,
 670  * and need to rewind the batch buffer to the state it had before the
 671  * brw_upload_state() call.
 672  */
 673 void
 674 brw_clear_dirty_bits(struct brw_context *brw)
 675 {
 676    struct brw_state_flags *state = &brw->state.dirty;
 677    memset(state, 0, sizeof(*state));
 678 }