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 "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 #include "gallivm/lp_bld_init.h"
  38
  39
  40 struct llvm_middle_end {
  41    struct draw_pt_middle_end base;
  42    struct draw_context *draw;
  43
  44    struct pt_emit *emit;
  45    struct pt_so_emit *so_emit;
  46    struct pt_fetch *fetch;
  47    struct pt_post_vs *post_vs;
  48
  49
  50    unsigned vertex_data_offset;
  51    unsigned vertex_size;
  52    unsigned input_prim;
  53    unsigned opt;
  54
  55    struct draw_llvm *llvm;
  56    struct draw_llvm_variant *current_variant;
  57 };
  58
  59
  60 static void
  61 llvm_middle_end_prepare( struct draw_pt_middle_end *middle,
  62                          unsigned in_prim,
  63                          unsigned opt,
  64                          unsigned *max_vertices )
  65 {
  66    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
  67    struct draw_context *draw = fpme->draw;
  68    struct llvm_vertex_shader *shader =
  69       llvm_vertex_shader(draw->vs.vertex_shader);
  70    char store[DRAW_LLVM_MAX_VARIANT_KEY_SIZE];
  71    struct draw_llvm_variant_key *key;
  72    struct draw_llvm_variant *variant = NULL;
  73    struct draw_llvm_variant_list_item *li;
  74    const unsigned out_prim = (draw->gs.geometry_shader ?
  75                               draw->gs.geometry_shader->output_primitive :
  76                               in_prim);
  77
  78    /* Add one to num_outputs because the pipeline occasionally tags on
  79     * an additional texcoord, eg for AA lines.
  80     */
  81    const unsigned nr = MAX2( shader->base.info.num_inputs,
  82                              shader->base.info.num_outputs + 1 );
  83
  84    fpme->input_prim = in_prim;
  85    fpme->opt = opt;
  86
  87    /* Always leave room for the vertex header whether we need it or
  88     * not.  It's hard to get rid of it in particular because of the
  89     * viewport code in draw_pt_post_vs.c.
  90     */
  91    fpme->vertex_size = sizeof(struct vertex_header) + nr * 4 * sizeof(float);
  92
  93
  94    /* XXX: it's not really gl rasterization rules we care about here,
  95     * but gl vs dx9 clip spaces.
  96     */
  97    draw_pt_post_vs_prepare( fpme->post_vs,
  98                             draw->clip_xy,
  99                             draw->clip_z,
 100                             draw->clip_user,
 101                             draw->guard_band_xy,
 102                             draw->identity_viewport,
 103                             (boolean)draw->rasterizer->gl_rasterization_rules,
 104                             (draw->vs.edgeflag_output ? TRUE : FALSE) );
 105
 106    draw_pt_so_emit_prepare( fpme->so_emit );
 107
 108    if (!(opt & PT_PIPELINE)) {
 109       draw_pt_emit_prepare( fpme->emit,
 110                             out_prim,
 111                             max_vertices );
 112
 113       *max_vertices = MAX2( *max_vertices, 4096 );
 114    }
 115    else {
 116       /* limit max fetches by limiting max_vertices */
 117       *max_vertices = 4096;
 118    }
 119
 120    /* return even number */
 121    *max_vertices = *max_vertices & ~1;
 122
 123    key = draw_llvm_make_variant_key(fpme->llvm, store);
 124
 125    /* Search shader's list of variants for the key */
 126    li = first_elem(&shader->variants);
 127    while (!at_end(&shader->variants, li)) {
 128       if (memcmp(&li->base->key, key, shader->variant_key_size) == 0) {
 129          variant = li->base;
 130          break;
 131       }
 132       li = next_elem(li);
 133    }
 134
 135    if (variant) {
 136       /* found the variant, move to head of global list (for LRU) */
 137       move_to_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
 138    }
 139    else {
 140       /* Need to create new variant */
 141       unsigned i;
 142
 143       /* First check if we've created too many variants.  If so, free
 144        * 25% of the LRU to avoid using too much memory.
 145        */
 146       if (fpme->llvm->nr_variants >= DRAW_MAX_SHADER_VARIANTS) {
 147          /*
 148           * XXX: should we flush here ?
 149           */
 150          for (i = 0; i < DRAW_MAX_SHADER_VARIANTS / 4; i++) {
 151             struct draw_llvm_variant_list_item *item;
 152             if (is_empty_list(&fpme->llvm->vs_variants_list)) {
 153                break;
 154             }
 155             item = last_elem(&fpme->llvm->vs_variants_list);
 156             assert(item);
 157             assert(item->base);
 158             draw_llvm_destroy_variant(item->base);
 159          }
 160       }
 161
 162       variant = draw_llvm_create_variant(fpme->llvm, nr, key);
 163
 164       if (variant) {
 165          insert_at_head(&shader->variants, &variant->list_item_local);
 166          insert_at_head(&fpme->llvm->vs_variants_list, &variant->list_item_global);
 167          fpme->llvm->nr_variants++;
 168          shader->variants_cached++;
 169       }
 170    }
 171
 172    fpme->current_variant = variant;
 173
 174    /*XXX we only support one constant buffer */
 175    fpme->llvm->jit_context.vs_constants =
 176       draw->pt.user.vs_constants[0];
 177    fpme->llvm->jit_context.gs_constants =
 178       draw->pt.user.gs_constants[0];
 179    fpme->llvm->jit_context.planes =
 180       (float (*) [DRAW_TOTAL_CLIP_PLANES][4]) draw->pt.user.planes[0];
 181    fpme->llvm->jit_context.viewport =
 182       (float *)draw->viewport.scale;
 183
 184 }
 185
 186
 187 static void pipeline(struct llvm_middle_end *llvm,
 188                      const struct draw_vertex_info *vert_info,
 189                      const struct draw_prim_info *prim_info)
 190 {
 191    if (prim_info->linear)
 192       draw_pipeline_run_linear( llvm->draw,
 193                                 vert_info,
 194                                 prim_info);
 195    else
 196       draw_pipeline_run( llvm->draw,
 197                          vert_info,
 198                          prim_info );
 199 }
 200
 201 static void emit(struct pt_emit *emit,
 202                  const struct draw_vertex_info *vert_info,
 203                  const struct draw_prim_info *prim_info)
 204 {
 205    if (prim_info->linear) {
 206       draw_pt_emit_linear(emit, vert_info, prim_info);
 207    }
 208    else {
 209       draw_pt_emit(emit, vert_info, prim_info);
 210    }
 211 }
 212
 213 static void
 214 llvm_pipeline_generic( struct draw_pt_middle_end *middle,
 215                        const struct draw_fetch_info *fetch_info,
 216                        const struct draw_prim_info *prim_info )
 217 {
 218    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 219    struct draw_context *draw = fpme->draw;
 220    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 221    struct draw_prim_info gs_prim_info;
 222    struct draw_vertex_info llvm_vert_info;
 223    struct draw_vertex_info gs_vert_info;
 224    struct draw_vertex_info *vert_info;
 225    unsigned opt = fpme->opt;
 226    unsigned clipped = 0;
 227
 228    llvm_vert_info.count = fetch_info->count;
 229    llvm_vert_info.vertex_size = fpme->vertex_size;
 230    llvm_vert_info.stride = fpme->vertex_size;
 231    llvm_vert_info.verts =
 232       (struct vertex_header *)MALLOC(fpme->vertex_size *
 233                                      align(fetch_info->count,  lp_native_vector_width / 32));
 234    if (!llvm_vert_info.verts) {
 235       assert(0);
 236       return;
 237    }
 238
 239    if (fetch_info->linear)
 240       clipped = fpme->current_variant->jit_func( &fpme->llvm->jit_context,
 241                                        llvm_vert_info.verts,
 242                                        (const char **)draw->pt.user.vbuffer,
 243                                        fetch_info->start,
 244                                        fetch_info->count,
 245                                        fpme->vertex_size,
 246                                        draw->pt.vertex_buffer,
 247                                        draw->instance_id);
 248    else
 249       clipped = fpme->current_variant->jit_func_elts( &fpme->llvm->jit_context,
 250                                             llvm_vert_info.verts,
 251                                             (const char **)draw->pt.user.vbuffer,
 252                                             fetch_info->elts,
 253                                             fetch_info->count,
 254                                             fpme->vertex_size,
 255                                             draw->pt.vertex_buffer,
 256                                             draw->instance_id);
 257
 258    /* Finished with fetch and vs:
 259     */
 260    fetch_info = NULL;
 261    vert_info = &llvm_vert_info;
 262
 263
 264    if ((opt & PT_SHADE) && gshader) {
 265       draw_geometry_shader_run(gshader,
 266                                draw->pt.user.gs_constants,
 267                                draw->pt.user.gs_constants_size,
 268                                vert_info,
 269                                prim_info,
 270                                &gs_vert_info,
 271                                &gs_prim_info);
 272
 273       FREE(vert_info->verts);
 274       vert_info = &gs_vert_info;
 275       prim_info = &gs_prim_info;
 276
 277       clipped = draw_pt_post_vs_run( fpme->post_vs, vert_info );
 278
 279    }
 280
 281    /* stream output needs to be done before clipping */
 282    draw_pt_so_emit( fpme->so_emit,
 283                     vert_info,
 284                     prim_info );
 285
 286    if (clipped) {
 287       opt |= PT_PIPELINE;
 288    }
 289
 290    /* Do we need to run the pipeline? Now will come here if clipped
 291     */
 292    if (opt & PT_PIPELINE) {
 293       pipeline( fpme,
 294                 vert_info,
 295                 prim_info );
 296    }
 297    else {
 298       emit( fpme->emit,
 299             vert_info,
 300             prim_info );
 301    }
 302    FREE(vert_info->verts);
 303 }
 304
 305
 306 static void llvm_middle_end_run( struct draw_pt_middle_end *middle,
 307                                  const unsigned *fetch_elts,
 308                                  unsigned fetch_count,
 309                                  const ushort *draw_elts,
 310                                  unsigned draw_count,
 311                                  unsigned prim_flags )
 312 {
 313    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 314    struct draw_fetch_info fetch_info;
 315    struct draw_prim_info prim_info;
 316
 317    fetch_info.linear = FALSE;
 318    fetch_info.start = 0;
 319    fetch_info.elts = fetch_elts;
 320    fetch_info.count = fetch_count;
 321
 322    prim_info.linear = FALSE;
 323    prim_info.start = 0;
 324    prim_info.count = draw_count;
 325    prim_info.elts = draw_elts;
 326    prim_info.prim = fpme->input_prim;
 327    prim_info.flags = prim_flags;
 328    prim_info.primitive_count = 1;
 329    prim_info.primitive_lengths = &draw_count;
 330
 331    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 332 }
 333
 334
 335 static void llvm_middle_end_linear_run( struct draw_pt_middle_end *middle,
 336                                        unsigned start,
 337                                        unsigned count,
 338                                        unsigned prim_flags)
 339 {
 340    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 341    struct draw_fetch_info fetch_info;
 342    struct draw_prim_info prim_info;
 343
 344    fetch_info.linear = TRUE;
 345    fetch_info.start = start;
 346    fetch_info.count = count;
 347    fetch_info.elts = NULL;
 348
 349    prim_info.linear = TRUE;
 350    prim_info.start = 0;
 351    prim_info.count = count;
 352    prim_info.elts = NULL;
 353    prim_info.prim = fpme->input_prim;
 354    prim_info.flags = prim_flags;
 355    prim_info.primitive_count = 1;
 356    prim_info.primitive_lengths = &count;
 357
 358    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 359 }
 360
 361
 362
 363 static boolean
 364 llvm_middle_end_linear_run_elts( struct draw_pt_middle_end *middle,
 365                                  unsigned start,
 366                                  unsigned count,
 367                                  const ushort *draw_elts,
 368                                  unsigned draw_count,
 369                                  unsigned prim_flags )
 370 {
 371    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 372    struct draw_fetch_info fetch_info;
 373    struct draw_prim_info prim_info;
 374
 375    fetch_info.linear = TRUE;
 376    fetch_info.start = start;
 377    fetch_info.count = count;
 378    fetch_info.elts = NULL;
 379
 380    prim_info.linear = FALSE;
 381    prim_info.start = 0;
 382    prim_info.count = draw_count;
 383    prim_info.elts = draw_elts;
 384    prim_info.prim = fpme->input_prim;
 385    prim_info.flags = prim_flags;
 386    prim_info.primitive_count = 1;
 387    prim_info.primitive_lengths = &draw_count;
 388
 389    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 390
 391    return TRUE;
 392 }
 393
 394
 395
 396 static void llvm_middle_end_finish( struct draw_pt_middle_end *middle )
 397 {
 398    /* nothing to do */
 399 }
 400
 401 static void llvm_middle_end_destroy( struct draw_pt_middle_end *middle )
 402 {
 403    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 404
 405    if (fpme->fetch)
 406       draw_pt_fetch_destroy( fpme->fetch );
 407
 408    if (fpme->emit)
 409       draw_pt_emit_destroy( fpme->emit );
 410
 411    if (fpme->so_emit)
 412       draw_pt_so_emit_destroy( fpme->so_emit );
 413
 414    if (fpme->post_vs)
 415       draw_pt_post_vs_destroy( fpme->post_vs );
 416
 417    FREE(middle);
 418 }
 419
 420
 421 struct draw_pt_middle_end *
 422 draw_pt_fetch_pipeline_or_emit_llvm(struct draw_context *draw)
 423 {
 424    struct llvm_middle_end *fpme = 0;
 425
 426    if (!draw->llvm)
 427       return NULL;
 428
 429    fpme = CALLOC_STRUCT( llvm_middle_end );
 430    if (!fpme)
 431       goto fail;
 432
 433    fpme->base.prepare         = llvm_middle_end_prepare;
 434    fpme->base.run             = llvm_middle_end_run;
 435    fpme->base.run_linear      = llvm_middle_end_linear_run;
 436    fpme->base.run_linear_elts = llvm_middle_end_linear_run_elts;
 437    fpme->base.finish          = llvm_middle_end_finish;
 438    fpme->base.destroy         = llvm_middle_end_destroy;
 439
 440    fpme->draw = draw;
 441
 442    fpme->fetch = draw_pt_fetch_create( draw );
 443    if (!fpme->fetch)
 444       goto fail;
 445
 446    fpme->post_vs = draw_pt_post_vs_create( draw );
 447    if (!fpme->post_vs)
 448       goto fail;
 449
 450    fpme->emit = draw_pt_emit_create( draw );
 451    if (!fpme->emit)
 452       goto fail;
 453
 454    fpme->so_emit = draw_pt_so_emit_create( draw );
 455    if (!fpme->so_emit)
 456       goto fail;
 457
 458    fpme->llvm = draw->llvm;
 459    if (!fpme->llvm)
 460       goto fail;
 461
 462    fpme->current_variant = NULL;
 463
 464    return &fpme->base;
 465
 466  fail:
 467    if (fpme)
 468       llvm_middle_end_destroy( &fpme->base );
 469
 470    return NULL;
 471 }