src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2010 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * 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, sub license, 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 portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_prim.h"
  31 #include "draw/draw_context.h"
  32 #include "draw/draw_gs.h"
  33 #include "draw/draw_vbuf.h"
  34 #include "draw/draw_vertex.h"
  35 #include "draw/draw_pt.h"
  36 #include "draw/draw_prim_assembler.h"
  37 #include "draw/draw_vs.h"
  38 #include "draw/draw_llvm.h"
  39 #include "gallivm/lp_bld_init.h"
  40
  41
  42 struct llvm_middle_end {
  43    struct draw_pt_middle_end base;
  44    struct draw_context *draw;
  45
  46    struct pt_emit *emit;
  47    struct pt_so_emit *so_emit;
  48    struct pt_fetch *fetch;
  49    struct pt_post_vs *post_vs;
  50
  51
  52    unsigned vertex_data_offset;
  53    unsigned vertex_size;
  54    unsigned input_prim;
  55    unsigned opt;
  56
  57    struct draw_llvm *llvm;
  58    struct draw_llvm_variant *current_variant;
  59 };
  60
  61
  62 static void
  63 llvm_middle_end_prepare_gs(struct llvm_middle_end *fpme)
  64 {
  65    struct draw_context *draw = fpme->draw;
  66    struct draw_geometry_shader *gs = draw->gs.geometry_shader;
  67    struct draw_gs_llvm_variant_key *key;
  68    struct draw_gs_llvm_variant *variant = NULL;
  69    struct draw_gs_llvm_variant_list_item *li;
  70    struct llvm_geometry_shader *shader = llvm_geometry_shader(gs);
  71    char store[DRAW_GS_LLVM_MAX_VARIANT_KEY_SIZE];
  72    unsigned i;
  73
  74    key = draw_gs_llvm_make_variant_key(fpme->llvm, store);
  75
  76    /* Search shader's list of variants for the key */
  77    li = first_elem(&shader->variants);
  78    while (!at_end(&shader->variants, li)) {
  79       if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
  80          variant = li->base;
  81          break;
  82       }
  83       li = next_elem(li);
  84    }
  85
  86    if (variant) {
  87       /* found the variant, move to head of global list (for LRU) */
  88       move_to_head(&fpme->llvm->gs_variants_list,
  89                    &variant->list_item_global);
  90    }
  91    else {
  92       /* Need to create new variant */
  93
  94       /* First check if we've created too many variants.  If so, free
  95        * 25% of the LRU to avoid using too much memory.
  96        */
  97       if (fpme->llvm->nr_gs_variants >= DRAW_MAX_SHADER_VARIANTS) {
  98          /*
  99           * XXX: should we flush here ?
 100           */
 101          for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
 102             struct draw_gs_llvm_variant_list_item *item;
 103             if (is_empty_list(&fpme->llvm->gs_variants_list)) {
 104                break;
 105             }
 106             item = last_elem(&fpme->llvm->gs_variants_list);
 107             assert(item);
 108             assert(item->base);
 109             draw_gs_llvm_destroy_variant(item->base);
 110          }
 111       }
 112
 113       variant = draw_gs_llvm_create_variant(fpme->llvm, gs->info.num_outputs, key);
 114
 115       if (variant) {
 116          insert_at_head(&shader->variants, &variant->list_item_local);
 117          insert_at_head(&fpme->llvm->gs_variants_list,
 118                         &variant->list_item_global);
 119          fpme->llvm->nr_gs_variants++;
 120          shader->variants_cached++;
 121       }
 122    }
 123
 124    gs->current_variant = variant;
 125 }
 126
 127 /**
 128  * Prepare/validate middle part of the vertex pipeline.
 129  * NOTE: if you change this function, also look at the non-LLVM
 130  * function fetch_pipeline_prepare() for similar changes.
 131  */
 132 static void
 133 llvm_middle_end_prepare( struct draw_pt_middle_end *middle,
 134                          unsigned in_prim,
 135                          unsigned opt,
 136                          unsigned *max_vertices )
 137 {
 138    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 139    struct draw_context *draw = fpme->draw;
 140    struct draw_vertex_shader *vs = draw->vs.vertex_shader;
 141    struct draw_geometry_shader *gs = draw->gs.geometry_shader;
 142    const unsigned out_prim = gs ? gs->output_primitive :
 143       u_assembled_prim(in_prim);
 144
 145    /* Add one to num_outputs because the pipeline occasionally tags on
 146     * an additional texcoord, eg for AA lines.
 147     */
 148    const unsigned nr = MAX2( vs->info.num_inputs,
 149                              vs->info.num_outputs + 1 );
 150
 151    fpme->input_prim = in_prim;
 152    fpme->opt = opt;
 153
 154    /* Always leave room for the vertex header whether we need it or
 155     * not.  It's hard to get rid of it in particular because of the
 156     * viewport code in draw_pt_post_vs.c.
 157     */
 158    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
 159
 160
 161    draw_pt_post_vs_prepare( fpme->post_vs,
 162                             draw->clip_xy,
 163                             draw->clip_z,
 164                             draw->clip_user,
 165                             draw->guard_band_xy,
 166                             draw->identity_viewport,
 167                             draw->rasterizer->clip_halfz,
 168                             (draw->vs.edgeflag_output ? TRUE : FALSE) );
 169
 170    draw_pt_so_emit_prepare( fpme->so_emit, gs == NULL );
 171
 172    if (!(opt & PT_PIPELINE)) {
 173       draw_pt_emit_prepare( fpme->emit,
 174                             out_prim,
 175                             max_vertices );
 176
 177       *max_vertices = MAX2( *max_vertices, 4096 );
 178    }
 179    else {
 180       /* limit max fetches by limiting max_vertices */
 181       *max_vertices = 4096;
 182    }
 183
 184    /* return even number */
 185    *max_vertices = *max_vertices & ~1;
 186
 187    /* Find/create the vertex shader variant */
 188    {
 189       struct draw_llvm_variant_key *key;
 190       struct draw_llvm_variant *variant = NULL;
 191       struct draw_llvm_variant_list_item *li;
 192       struct llvm_vertex_shader *shader = llvm_vertex_shader(vs);
 193       char store[DRAW_LLVM_MAX_VARIANT_KEY_SIZE];
 194       unsigned i;
 195
 196       key = draw_llvm_make_variant_key(fpme->llvm, store);
 197
 198       /* Search shader's list of variants for the key */
 199       li = first_elem(&shader->variants);
 200       while (!at_end(&shader->variants, li)) {
 201          if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
 202             variant = li->base;
 203             break;
 204          }
 205          li = next_elem(li);
 206       }
 207
 208       if (variant) {
 209          /* found the variant, move to head of global list (for LRU) */
 210          move_to_head(&fpme->llvm->vs_variants_list,
 211                       &variant->list_item_global);
 212       }
 213       else {
 214          /* Need to create new variant */
 215
 216          /* First check if we've created too many variants.  If so, free
 217           * 25% of the LRU to avoid using too much memory.
 218           */
 219          if (fpme->llvm->nr_variants >= DRAW_MAX_SHADER_VARIANTS) {
 220             /*
 221              * XXX: should we flush here ?
 222              */
 223             for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
 224                struct draw_llvm_variant_list_item *item;
 225                if (is_empty_list(&fpme->llvm->vs_variants_list)) {
 226                   break;
 227                }
 228                item = last_elem(&fpme->llvm->vs_variants_list);
 229                assert(item);
 230                assert(item->base);
 231                draw_llvm_destroy_variant(item->base);
 232             }
 233          }
 234
 235          variant = draw_llvm_create_variant(fpme->llvm, nr, key);
 236
 237          if (variant) {
 238             insert_at_head(&shader->variants, &variant->list_item_local);
 239             insert_at_head(&fpme->llvm->vs_variants_list,
 240                            &variant->list_item_global);
 241             fpme->llvm->nr_variants++;
 242             shader->variants_cached++;
 243          }
 244       }
 245
 246       fpme->current_variant = variant;
 247    }
 248
 249    if (gs) {
 250       llvm_middle_end_prepare_gs(fpme);
 251    }
 252 }
 253
 254
 255 /**
 256  * Bind/update constant buffer pointers, clip planes and viewport dims.
 257  * These are "light weight" parameters which aren't baked into the
 258  * generated code.  Updating these items is much cheaper than revalidating
 259  * and rebuilding the generated pipeline code.
 260  */
 261 static void
 262 llvm_middle_end_bind_parameters(struct draw_pt_middle_end *middle)
 263 {
 264    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 265    struct draw_context *draw = fpme->draw;
 266    unsigned i;
 267
 268    for (i = 0; i < Elements(fpme->llvm->jit_context.vs_constants); ++i) {
 269       fpme->llvm->jit_context.vs_constants[i] = draw->pt.user.vs_constants[i];
 270    }
 271    for (i = 0; i < Elements(fpme->llvm->gs_jit_context.constants); ++i) {
 272       fpme->llvm->gs_jit_context.constants[i] = draw->pt.user.gs_constants[i];
 273    }
 274
 275    fpme->llvm->jit_context.planes =
 276       (float (*)[DRAW_TOTAL_CLIP_PLANES][4]) draw->pt.user.planes[0];
 277    fpme->llvm->gs_jit_context.planes =
 278       (float (*)[DRAW_TOTAL_CLIP_PLANES][4]) draw->pt.user.planes[0];
 279
 280    fpme->llvm->jit_context.viewport = (float *) draw->viewports[0].scale;
 281    fpme->llvm->gs_jit_context.viewport = (float *) draw->viewports[0].scale;
 282 }
 283
 284
 285 static void pipeline(struct llvm_middle_end *llvm,
 286                      const struct draw_vertex_info *vert_info,
 287                      const struct draw_prim_info *prim_info)
 288 {
 289    if (prim_info->linear)
 290       draw_pipeline_run_linear( llvm->draw,
 291                                 vert_info,
 292                                 prim_info);
 293    else
 294       draw_pipeline_run( llvm->draw,
 295                          vert_info,
 296                          prim_info );
 297 }
 298
 299 static void emit(struct pt_emit *emit,
 300                  const struct draw_vertex_info *vert_info,
 301                  const struct draw_prim_info *prim_info)
 302 {
 303    if (prim_info->linear) {
 304       draw_pt_emit_linear(emit, vert_info, prim_info);
 305    }
 306    else {
 307       draw_pt_emit(emit, vert_info, prim_info);
 308    }
 309 }
 310
 311 static void
 312 llvm_pipeline_generic( struct draw_pt_middle_end *middle,
 313                        const struct draw_fetch_info *fetch_info,
 314                        const struct draw_prim_info *in_prim_info )
 315 {
 316    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 317    struct draw_context *draw = fpme->draw;
 318    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 319    struct draw_prim_info gs_prim_info;
 320    struct draw_vertex_info llvm_vert_info;
 321    struct draw_vertex_info gs_vert_info;
 322    struct draw_vertex_info *vert_info;
 323    struct draw_prim_info ia_prim_info;
 324    struct draw_vertex_info ia_vert_info;
 325    const struct draw_prim_info *prim_info = in_prim_info;
 326    boolean free_prim_info = FALSE;
 327    unsigned opt = fpme->opt;
 328    unsigned clipped = 0;
 329
 330    llvm_vert_info.count = fetch_info->count;
 331    llvm_vert_info.vertex_size = fpme->vertex_size;
 332    llvm_vert_info.stride = fpme->vertex_size;
 333    llvm_vert_info.verts =
 334       (struct vertex_header *)MALLOC(fpme->vertex_size *
 335                                      align(fetch_info->count,  lp_native_vector_width / 32));
 336    if (!llvm_vert_info.verts) {
 337       assert(0);
 338       return;
 339    }
 340
 341    if (draw->collect_statistics) {
 342       draw->statistics.ia_vertices += prim_info->count;
 343       draw->statistics.ia_primitives +=
 344          u_decomposed_prims_for_vertices(prim_info->prim, prim_info->count);
 345       draw->statistics.vs_invocations += fetch_info->count;
 346    }
 347
 348    if (fetch_info->linear)
 349       clipped = fpme->current_variant->jit_func( &fpme->llvm->jit_context,
 350                                        llvm_vert_info.verts,
 351                                        draw->pt.user.vbuffer,
 352                                        fetch_info->start,
 353                                        fetch_info->count,
 354                                        fpme->vertex_size,
 355                                        draw->pt.vertex_buffer,
 356                                        draw->instance_id,
 357                                        draw->start_index);
 358    else
 359       clipped = fpme->current_variant->jit_func_elts( &fpme->llvm->jit_context,
 360                                             llvm_vert_info.verts,
 361                                             draw->pt.user.vbuffer,
 362                                             fetch_info->elts,
 363                                             draw->pt.user.eltMax,
 364                                             fetch_info->count,
 365                                             fpme->vertex_size,
 366                                             draw->pt.vertex_buffer,
 367                                             draw->instance_id,
 368                                             draw->pt.user.eltBias);
 369
 370    /* Finished with fetch and vs:
 371     */
 372    fetch_info = NULL;
 373    vert_info = &llvm_vert_info;
 374
 375
 376    if ((opt & PT_SHADE) && gshader) {
 377       struct draw_vertex_shader *vshader = draw->vs.vertex_shader;
 378       draw_geometry_shader_run(gshader,
 379                                draw->pt.user.gs_constants,
 380                                draw->pt.user.gs_constants_size,
 381                                vert_info,
 382                                prim_info,
 383                                &vshader->info,
 384                                &gs_vert_info,
 385                                &gs_prim_info);
 386
 387       FREE(vert_info->verts);
 388       vert_info = &gs_vert_info;
 389       prim_info = &gs_prim_info;
 390    } else {
 391       if (draw_prim_assembler_is_required(draw, prim_info, vert_info)) {
 392          draw_prim_assembler_run(draw, prim_info, vert_info,
 393                                  &ia_prim_info, &ia_vert_info);
 394
 395          if (ia_vert_info.count) {
 396             FREE(vert_info->verts);
 397             vert_info = &ia_vert_info;
 398             prim_info = &ia_prim_info;
 399             free_prim_info = TRUE;
 400          }
 401       }
 402    }
 403    if (prim_info->count == 0) {
 404       debug_printf("GS/IA didn't emit any vertices!\n");
 405
 406       FREE(vert_info->verts);
 407       if (free_prim_info) {
 408          FREE(prim_info->primitive_lengths);
 409       }
 410       return;
 411    }
 412
 413    /* stream output needs to be done before clipping */
 414    draw_pt_so_emit( fpme->so_emit, vert_info, prim_info );
 415
 416    draw_stats_clipper_primitives(draw, prim_info);
 417
 418    /*
 419     * if there's no position, need to stop now, or the latter stages
 420     * will try to access non-existent position output.
 421     */
 422    if (draw_current_shader_position_output(draw) != -1) {
 423       if ((opt & PT_SHADE) && gshader) {
 424          clipped = draw_pt_post_vs_run( fpme->post_vs, vert_info, prim_info );
 425       }
 426       if (clipped) {
 427          opt |= PT_PIPELINE;
 428       }
 429
 430       /* Do we need to run the pipeline? Now will come here if clipped
 431        */
 432       if (opt & PT_PIPELINE) {
 433          pipeline( fpme, vert_info, prim_info );
 434       }
 435       else {
 436          emit( fpme->emit, vert_info, prim_info );
 437       }
 438    }
 439    FREE(vert_info->verts);
 440    if (free_prim_info) {
 441       FREE(prim_info->primitive_lengths);
 442    }
 443 }
 444
 445
 446 static void llvm_middle_end_run( struct draw_pt_middle_end *middle,
 447                                  const unsigned *fetch_elts,
 448                                  unsigned fetch_count,
 449                                  const ushort *draw_elts,
 450                                  unsigned draw_count,
 451                                  unsigned prim_flags )
 452 {
 453    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 454    struct draw_fetch_info fetch_info;
 455    struct draw_prim_info prim_info;
 456
 457    fetch_info.linear = FALSE;
 458    fetch_info.start = 0;
 459    fetch_info.elts = fetch_elts;
 460    fetch_info.count = fetch_count;
 461
 462    prim_info.linear = FALSE;
 463    prim_info.start = 0;
 464    prim_info.count = draw_count;
 465    prim_info.elts = draw_elts;
 466    prim_info.prim = fpme->input_prim;
 467    prim_info.flags = prim_flags;
 468    prim_info.primitive_count = 1;
 469    prim_info.primitive_lengths = &draw_count;
 470
 471    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 472 }
 473
 474
 475 static void llvm_middle_end_linear_run( struct draw_pt_middle_end *middle,
 476                                        unsigned start,
 477                                        unsigned count,
 478                                        unsigned prim_flags)
 479 {
 480    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 481    struct draw_fetch_info fetch_info;
 482    struct draw_prim_info prim_info;
 483
 484    fetch_info.linear = TRUE;
 485    fetch_info.start = start;
 486    fetch_info.count = count;
 487    fetch_info.elts = NULL;
 488
 489    prim_info.linear = TRUE;
 490    prim_info.start = 0;
 491    prim_info.count = count;
 492    prim_info.elts = NULL;
 493    prim_info.prim = fpme->input_prim;
 494    prim_info.flags = prim_flags;
 495    prim_info.primitive_count = 1;
 496    prim_info.primitive_lengths = &count;
 497
 498    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 499 }
 500
 501
 502
 503 static boolean
 504 llvm_middle_end_linear_run_elts( struct draw_pt_middle_end *middle,
 505                                  unsigned start,
 506                                  unsigned count,
 507                                  const ushort *draw_elts,
 508                                  unsigned draw_count,
 509                                  unsigned prim_flags )
 510 {
 511    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 512    struct draw_fetch_info fetch_info;
 513    struct draw_prim_info prim_info;
 514
 515    fetch_info.linear = TRUE;
 516    fetch_info.start = start;
 517    fetch_info.count = count;
 518    fetch_info.elts = NULL;
 519
 520    prim_info.linear = FALSE;
 521    prim_info.start = 0;
 522    prim_info.count = draw_count;
 523    prim_info.elts = draw_elts;
 524    prim_info.prim = fpme->input_prim;
 525    prim_info.flags = prim_flags;
 526    prim_info.primitive_count = 1;
 527    prim_info.primitive_lengths = &draw_count;
 528
 529    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 530
 531    return TRUE;
 532 }
 533
 534
 535
 536 static void llvm_middle_end_finish( struct draw_pt_middle_end *middle )
 537 {
 538    /* nothing to do */
 539 }
 540
 541 static void llvm_middle_end_destroy( struct draw_pt_middle_end *middle )
 542 {
 543    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 544
 545    if (fpme->fetch)
 546       draw_pt_fetch_destroy( fpme->fetch );
 547
 548    if (fpme->emit)
 549       draw_pt_emit_destroy( fpme->emit );
 550
 551    if (fpme->so_emit)
 552       draw_pt_so_emit_destroy( fpme->so_emit );
 553
 554    if (fpme->post_vs)
 555       draw_pt_post_vs_destroy( fpme->post_vs );
 556
 557    FREE(middle);
 558 }
 559
 560
 561 struct draw_pt_middle_end *
 562 draw_pt_fetch_pipeline_or_emit_llvm(struct draw_context *draw)
 563 {
 564    struct llvm_middle_end *fpme = 0;
 565
 566    if (!draw->llvm)
 567       return NULL;
 568
 569    fpme = CALLOC_STRUCT( llvm_middle_end );
 570    if (!fpme)
 571       goto fail;
 572
 573    fpme->base.prepare         = llvm_middle_end_prepare;
 574    fpme->base.bind_parameters = llvm_middle_end_bind_parameters;
 575    fpme->base.run             = llvm_middle_end_run;
 576    fpme->base.run_linear      = llvm_middle_end_linear_run;
 577    fpme->base.run_linear_elts = llvm_middle_end_linear_run_elts;
 578    fpme->base.finish          = llvm_middle_end_finish;
 579    fpme->base.destroy         = llvm_middle_end_destroy;
 580
 581    fpme->draw = draw;
 582
 583    fpme->fetch = draw_pt_fetch_create( draw );
 584    if (!fpme->fetch)
 585       goto fail;
 586
 587    fpme->post_vs = draw_pt_post_vs_create( draw );
 588    if (!fpme->post_vs)
 589       goto fail;
 590
 591    fpme->emit = draw_pt_emit_create( draw );
 592    if (!fpme->emit)
 593       goto fail;
 594
 595    fpme->so_emit = draw_pt_so_emit_create( draw );
 596    if (!fpme->so_emit)
 597       goto fail;
 598
 599    fpme->llvm = draw->llvm;
 600    if (!fpme->llvm)
 601       goto fail;
 602
 603    fpme->current_variant = NULL;
 604
 605    return &fpme->base;
 606
 607  fail:
 608    if (fpme)
 609       llvm_middle_end_destroy( &fpme->base );
 610
 611    return NULL;
 612 }