src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c

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  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
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  27
  28 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "draw/draw_context.h"
  31 #include "draw/draw_gs.h"
  32 #include "draw/draw_vbuf.h"
  33 #include "draw/draw_vertex.h"
  34 #include "draw/draw_pt.h"
  35 #include "draw/draw_vs.h"
  36 #include "draw/draw_llvm.h"
  37
  38
  39 struct llvm_middle_end {
  40    struct draw_pt_middle_end base;
  41    struct draw_context *draw;
  42
  43    struct pt_emit *emit;
  44    struct pt_so_emit *so_emit;
  45    struct pt_fetch *fetch;
  46    struct pt_post_vs *post_vs;
  47
  48
  49    unsigned vertex_data_offset;
  50    unsigned vertex_size;
  51    unsigned input_prim;
  52    unsigned opt;
  53
  54    struct draw_llvm *llvm;
  55    struct draw_llvm_variant *current_variant;
  56 };
  57
  58
  59 static void
  60 llvm_middle_end_prepare( struct draw_pt_middle_end *middle,
  61                          unsigned in_prim,
  62                          unsigned opt,
  63                          unsigned *max_vertices )
  64 {
  65    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
  66    struct draw_context *draw = fpme->draw;
  67    struct llvm_vertex_shader *shader =
  68       llvm_vertex_shader(draw->vs.vertex_shader);
  69    char store[DRAW_LLVM_MAX_VARIANT_KEY_SIZE];
  70    struct draw_llvm_variant_key *key;
  71    struct draw_llvm_variant *variant = NULL;
  72    struct draw_llvm_variant_list_item *li;
  73    unsigned i;
  74    unsigned instance_id_index = ~0;
  75
  76
  77    unsigned out_prim = (draw->gs.geometry_shader ?
  78                         draw->gs.geometry_shader->output_primitive :
  79                         in_prim);
  80
  81    /* Add one to num_outputs because the pipeline occasionally tags on
  82     * an additional texcoord, eg for AA lines.
  83     */
  84    unsigned nr = MAX2( shader->base.info.num_inputs,
  85                        shader->base.info.num_outputs + 1 );
  86
  87    /* Scan for instanceID system value.
  88     */
  89    for (i = 0; i < shader->base.info.num_inputs; i++) {
  90       if (shader->base.info.input_semantic_name[i] == TGSI_SEMANTIC_INSTANCEID) {
  91          instance_id_index = i;
  92          break;
  93       }
  94    }
  95
  96    fpme->input_prim = in_prim;
  97    fpme->opt = opt;
  98
  99    /* Always leave room for the vertex header whether we need it or
 100     * not.  It's hard to get rid of it in particular because of the
 101     * viewport code in draw_pt_post_vs.c.
 102     */
 103    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
 104
 105
 106    /* XXX: it's not really gl rasterization rules we care about here,
 107     * but gl vs dx9 clip spaces.
 108     */
 109    draw_pt_post_vs_prepare( fpme->post_vs,
 110                             draw->clip_xy,
 111                             draw->clip_z,
 112                             draw->clip_user,
 113                             draw->identity_viewport,
 114                             (boolean)draw->rasterizer->gl_rasterization_rules,
 115                             (draw->vs.edgeflag_output ? TRUE : FALSE) );
 116
 117    draw_pt_so_emit_prepare( fpme->so_emit );
 118
 119    if (!(opt & PT_PIPELINE)) {
 120       draw_pt_emit_prepare( fpme->emit,
 121                             out_prim,
 122                             max_vertices );
 123
 124       *max_vertices = MAX2( *max_vertices, 4096 );
 125    }
 126    else {
 127       /* limit max fetches by limiting max_vertices */
 128       *max_vertices = 4096;
 129    }
 130
 131    /* return even number */
 132    *max_vertices = *max_vertices & ~1;
 133
 134    key = draw_llvm_make_variant_key(fpme->llvm, store);
 135
 136    li = first_elem(&shader->variants);
 137    while(!at_end(&shader->variants, li)) {
 138       if(memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
 139          variant = li->base;
 140          break;
 141       }
 142       li = next_elem(li);
 143    }
 144
 145    if (variant) {
 146       move_to_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
 147    }
 148    else {
 149       unsigned i;
 150       if (fpme->llvm->nr_variants >= DRAW_MAX_SHADER_VARIANTS) {
 151          /*
 152           * XXX: should we flush here ?
 153           */
 154          for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
 155             struct draw_llvm_variant_list_item *item =
 156                last_elem(&fpme->llvm->vs_variants_list);
 157             draw_llvm_destroy_variant(item->base);
 158          }
 159       }
 160
 161       variant = draw_llvm_create_variant(fpme->llvm, nr, key);
 162
 163       if (variant) {
 164          insert_at_head(&shader->variants, &variant->list_item_local);
 165          insert_at_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
 166          fpme->llvm->nr_variants++;
 167          shader->variants_cached++;
 168       }
 169    }
 170
 171    fpme->current_variant = variant;
 172
 173    /*XXX we only support one constant buffer */
 174    fpme->llvm->jit_context.vs_constants =
 175       draw->pt.user.vs_constants[0];
 176    fpme->llvm->jit_context.gs_constants =
 177       draw->pt.user.gs_constants[0];
 178    fpme->llvm->jit_context.planes =
 179       (float (*) [12][4]) draw->pt.user.planes[0];
 180    fpme->llvm->jit_context.viewport =
 181       (float *)draw->viewport.scale;
 182
 183 }
 184
 185
 186 static void pipeline(struct llvm_middle_end *llvm,
 187                      const struct draw_vertex_info *vert_info,
 188                      const struct draw_prim_info *prim_info)
 189 {
 190    if (prim_info->linear)
 191       draw_pipeline_run_linear( llvm->draw,
 192                                 vert_info,
 193                                 prim_info);
 194    else
 195       draw_pipeline_run( llvm->draw,
 196                          vert_info,
 197                          prim_info );
 198 }
 199
 200 static void emit(struct pt_emit *emit,
 201                  const struct draw_vertex_info *vert_info,
 202                  const struct draw_prim_info *prim_info)
 203 {
 204    if (prim_info->linear) {
 205       draw_pt_emit_linear(emit, vert_info, prim_info);
 206    }
 207    else {
 208       draw_pt_emit(emit, vert_info, prim_info);
 209    }
 210 }
 211
 212 static void
 213 llvm_pipeline_generic( struct draw_pt_middle_end *middle,
 214                        const struct draw_fetch_info *fetch_info,
 215                        const struct draw_prim_info *prim_info )
 216 {
 217    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 218    struct draw_context *draw = fpme->draw;
 219    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 220    struct draw_prim_info gs_prim_info;
 221    struct draw_vertex_info llvm_vert_info;
 222    struct draw_vertex_info gs_vert_info;
 223    struct draw_vertex_info *vert_info;
 224    unsigned opt = fpme->opt;
 225    unsigned clipped = 0;
 226
 227    llvm_vert_info.count = fetch_info->count;
 228    llvm_vert_info.vertex_size = fpme->vertex_size;
 229    llvm_vert_info.stride = fpme->vertex_size;
 230    llvm_vert_info.verts =
 231       (struct vertex_header *)MALLOC(fpme->vertex_size *
 232                                      align(fetch_info->count,  4));
 233    if (!llvm_vert_info.verts) {
 234       assert(0);
 235       return;
 236    }
 237
 238    if (fetch_info->linear)
 239       clipped = fpme->current_variant->jit_func( &fpme->llvm->jit_context,
 240                                        llvm_vert_info.verts,
 241                                        (const char **)draw->pt.user.vbuffer,
 242                                        fetch_info->start,
 243                                        fetch_info->count,
 244                                        fpme->vertex_size,
 245                                        draw->pt.vertex_buffer,
 246                                        draw->instance_id);
 247    else
 248       clipped = fpme->current_variant->jit_func_elts( &fpme->llvm->jit_context,
 249                                             llvm_vert_info.verts,
 250                                             (const char **)draw->pt.user.vbuffer,
 251                                             fetch_info->elts,
 252                                             fetch_info->count,
 253                                             fpme->vertex_size,
 254                                             draw->pt.vertex_buffer,
 255                                             draw->instance_id);
 256
 257    /* Finished with fetch and vs:
 258     */
 259    fetch_info = NULL;
 260    vert_info = &llvm_vert_info;
 261
 262
 263    if ((opt & PT_SHADE) && gshader) {
 264       draw_geometry_shader_run(gshader,
 265                                draw->pt.user.gs_constants,
 266                                draw->pt.user.gs_constants_size,
 267                                vert_info,
 268                                prim_info,
 269                                &gs_vert_info,
 270                                &gs_prim_info);
 271
 272       FREE(vert_info->verts);
 273       vert_info = &gs_vert_info;
 274       prim_info = &gs_prim_info;
 275
 276       clipped = draw_pt_post_vs_run( fpme->post_vs, vert_info );
 277
 278    }
 279
 280    /* stream output needs to be done before clipping */
 281    draw_pt_so_emit( fpme->so_emit,
 282                     vert_info,
 283                     prim_info );
 284
 285    if (clipped) {
 286       opt |= PT_PIPELINE;
 287    }
 288
 289    /* Do we need to run the pipeline? Now will come here if clipped
 290     */
 291    if (opt & PT_PIPELINE) {
 292       pipeline( fpme,
 293                 vert_info,
 294                 prim_info );
 295    }
 296    else {
 297       emit( fpme->emit,
 298             vert_info,
 299             prim_info );
 300    }
 301    FREE(vert_info->verts);
 302 }
 303
 304
 305 static void llvm_middle_end_run( struct draw_pt_middle_end *middle,
 306                                  const unsigned *fetch_elts,
 307                                  unsigned fetch_count,
 308                                  const ushort *draw_elts,
 309                                  unsigned draw_count,
 310                                  unsigned prim_flags )
 311 {
 312    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 313    struct draw_fetch_info fetch_info;
 314    struct draw_prim_info prim_info;
 315
 316    fetch_info.linear = FALSE;
 317    fetch_info.start = 0;
 318    fetch_info.elts = fetch_elts;
 319    fetch_info.count = fetch_count;
 320
 321    prim_info.linear = FALSE;
 322    prim_info.start = 0;
 323    prim_info.count = draw_count;
 324    prim_info.elts = draw_elts;
 325    prim_info.prim = fpme->input_prim;
 326    prim_info.flags = prim_flags;
 327    prim_info.primitive_count = 1;
 328    prim_info.primitive_lengths = &draw_count;
 329
 330    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 331 }
 332
 333
 334 static void llvm_middle_end_linear_run( struct draw_pt_middle_end *middle,
 335                                        unsigned start,
 336                                        unsigned count,
 337                                        unsigned prim_flags)
 338 {
 339    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 340    struct draw_fetch_info fetch_info;
 341    struct draw_prim_info prim_info;
 342
 343    fetch_info.linear = TRUE;
 344    fetch_info.start = start;
 345    fetch_info.count = count;
 346    fetch_info.elts = NULL;
 347
 348    prim_info.linear = TRUE;
 349    prim_info.start = 0;
 350    prim_info.count = count;
 351    prim_info.elts = NULL;
 352    prim_info.prim = fpme->input_prim;
 353    prim_info.flags = prim_flags;
 354    prim_info.primitive_count = 1;
 355    prim_info.primitive_lengths = &count;
 356
 357    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 358 }
 359
 360
 361
 362 static boolean
 363 llvm_middle_end_linear_run_elts( struct draw_pt_middle_end *middle,
 364                                  unsigned start,
 365                                  unsigned count,
 366                                  const ushort *draw_elts,
 367                                  unsigned draw_count,
 368                                  unsigned prim_flags )
 369 {
 370    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 371    struct draw_fetch_info fetch_info;
 372    struct draw_prim_info prim_info;
 373
 374    fetch_info.linear = TRUE;
 375    fetch_info.start = start;
 376    fetch_info.count = count;
 377    fetch_info.elts = NULL;
 378
 379    prim_info.linear = FALSE;
 380    prim_info.start = 0;
 381    prim_info.count = draw_count;
 382    prim_info.elts = draw_elts;
 383    prim_info.prim = fpme->input_prim;
 384    prim_info.flags = prim_flags;
 385    prim_info.primitive_count = 1;
 386    prim_info.primitive_lengths = &draw_count;
 387
 388    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 389
 390    return TRUE;
 391 }
 392
 393
 394
 395 static void llvm_middle_end_finish( struct draw_pt_middle_end *middle )
 396 {
 397    /* nothing to do */
 398 }
 399
 400 static void llvm_middle_end_destroy( struct draw_pt_middle_end *middle )
 401 {
 402    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 403
 404    if (fpme->fetch)
 405       draw_pt_fetch_destroy( fpme->fetch );
 406
 407    if (fpme->emit)
 408       draw_pt_emit_destroy( fpme->emit );
 409
 410    if (fpme->so_emit)
 411       draw_pt_so_emit_destroy( fpme->so_emit );
 412
 413    if (fpme->post_vs)
 414       draw_pt_post_vs_destroy( fpme->post_vs );
 415
 416    FREE(middle);
 417 }
 418
 419
 420 struct draw_pt_middle_end *
 421 draw_pt_fetch_pipeline_or_emit_llvm(struct draw_context *draw)
 422 {
 423    struct llvm_middle_end *fpme = 0;
 424
 425    if (!draw->engine)
 426       return NULL;
 427
 428    fpme = CALLOC_STRUCT( llvm_middle_end );
 429    if (!fpme)
 430       goto fail;
 431
 432    fpme->base.prepare         = llvm_middle_end_prepare;
 433    fpme->base.run             = llvm_middle_end_run;
 434    fpme->base.run_linear      = llvm_middle_end_linear_run;
 435    fpme->base.run_linear_elts = llvm_middle_end_linear_run_elts;
 436    fpme->base.finish          = llvm_middle_end_finish;
 437    fpme->base.destroy         = llvm_middle_end_destroy;
 438
 439    fpme->draw = draw;
 440
 441    fpme->fetch = draw_pt_fetch_create( draw );
 442    if (!fpme->fetch)
 443       goto fail;
 444
 445    fpme->post_vs = draw_pt_post_vs_create( draw );
 446    if (!fpme->post_vs)
 447       goto fail;
 448
 449    fpme->emit = draw_pt_emit_create( draw );
 450    if (!fpme->emit)
 451       goto fail;
 452
 453    fpme->so_emit = draw_pt_so_emit_create( draw );
 454    if (!fpme->so_emit)
 455       goto fail;
 456
 457    fpme->llvm = draw->llvm;
 458    if (!fpme->llvm)
 459       goto fail;
 460
 461    fpme->current_variant = NULL;
 462
 463    return &fpme->base;
 464
 465  fail:
 466    if (fpme)
 467       llvm_middle_end_destroy( &fpme->base );
 468
 469    return NULL;
 470 }