src/gallium/auxiliary/draw/draw_pt_fetch_shade_pipeline_llvm.c

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   3  * Copyright 2010 VMware, Inc.
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  11  * permit persons to whom the Software is furnished to do so, subject to
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  16  * of the Software.
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  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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  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
  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 }
 179
 180
 181 static void pipeline(struct llvm_middle_end *llvm,
 182                      const struct draw_vertex_info *vert_info,
 183                      const struct draw_prim_info *prim_info)
 184 {
 185    if (prim_info->linear)
 186       draw_pipeline_run_linear( llvm->draw,
 187                                 vert_info,
 188                                 prim_info);
 189    else
 190       draw_pipeline_run( llvm->draw,
 191                          vert_info,
 192                          prim_info );
 193 }
 194
 195 static void emit(struct pt_emit *emit,
 196                  const struct draw_vertex_info *vert_info,
 197                  const struct draw_prim_info *prim_info)
 198 {
 199    if (prim_info->linear) {
 200       draw_pt_emit_linear(emit, vert_info, prim_info);
 201    }
 202    else {
 203       draw_pt_emit(emit, vert_info, prim_info);
 204    }
 205 }
 206
 207 static void
 208 llvm_pipeline_generic( struct draw_pt_middle_end *middle,
 209                        const struct draw_fetch_info *fetch_info,
 210                        const struct draw_prim_info *prim_info )
 211 {
 212    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 213    struct draw_context *draw = fpme->draw;
 214    struct draw_geometry_shader *gshader = draw->gs.geometry_shader;
 215    struct draw_prim_info gs_prim_info;
 216    struct draw_vertex_info llvm_vert_info;
 217    struct draw_vertex_info gs_vert_info;
 218    struct draw_vertex_info *vert_info;
 219    unsigned opt = fpme->opt;
 220
 221    llvm_vert_info.count = fetch_info->count;
 222    llvm_vert_info.vertex_size = fpme->vertex_size;
 223    llvm_vert_info.stride = fpme->vertex_size;
 224    llvm_vert_info.verts =
 225       (struct vertex_header *)MALLOC(fpme->vertex_size *
 226                                      align(fetch_info->count,  4));
 227    if (!llvm_vert_info.verts) {
 228       assert(0);
 229       return;
 230    }
 231
 232    if (fetch_info->linear)
 233       fpme->current_variant->jit_func( &fpme->llvm->jit_context,
 234                                        llvm_vert_info.verts,
 235                                        (const char **)draw->pt.user.vbuffer,
 236                                        fetch_info->start,
 237                                        fetch_info->count,
 238                                        fpme->vertex_size,
 239                                        draw->pt.vertex_buffer,
 240                                        draw->instance_id);
 241    else
 242       fpme->current_variant->jit_func_elts( &fpme->llvm->jit_context,
 243                                             llvm_vert_info.verts,
 244                                             (const char **)draw->pt.user.vbuffer,
 245                                             fetch_info->elts,
 246                                             fetch_info->count,
 247                                             fpme->vertex_size,
 248                                             draw->pt.vertex_buffer,
 249                                             draw->instance_id);
 250
 251    /* Finished with fetch and vs:
 252     */
 253    fetch_info = NULL;
 254    vert_info = &llvm_vert_info;
 255
 256
 257    if ((opt & PT_SHADE) && gshader) {
 258       draw_geometry_shader_run(gshader,
 259                                draw->pt.user.gs_constants,
 260                                draw->pt.user.gs_constants_size,
 261                                vert_info,
 262                                prim_info,
 263                                &gs_vert_info,
 264                                &gs_prim_info);
 265
 266       FREE(vert_info->verts);
 267       vert_info = &gs_vert_info;
 268       prim_info = &gs_prim_info;
 269    }
 270
 271    /* stream output needs to be done before clipping */
 272    draw_pt_so_emit( fpme->so_emit,
 273                     vert_info,
 274                     prim_info );
 275
 276    if (draw_pt_post_vs_run( fpme->post_vs, vert_info )) {
 277       opt |= PT_PIPELINE;
 278    }
 279
 280    /* Do we need to run the pipeline?
 281     */
 282    if (opt & PT_PIPELINE) {
 283       pipeline( fpme,
 284                 vert_info,
 285                 prim_info );
 286    }
 287    else {
 288       emit( fpme->emit,
 289             vert_info,
 290             prim_info );
 291    }
 292    FREE(vert_info->verts);
 293 }
 294
 295
 296 static void llvm_middle_end_run( struct draw_pt_middle_end *middle,
 297                                  const unsigned *fetch_elts,
 298                                  unsigned fetch_count,
 299                                  const ushort *draw_elts,
 300                                  unsigned draw_count,
 301                                  unsigned prim_flags )
 302 {
 303    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 304    struct draw_fetch_info fetch_info;
 305    struct draw_prim_info prim_info;
 306
 307    fetch_info.linear = FALSE;
 308    fetch_info.start = 0;
 309    fetch_info.elts = fetch_elts;
 310    fetch_info.count = fetch_count;
 311
 312    prim_info.linear = FALSE;
 313    prim_info.start = 0;
 314    prim_info.count = draw_count;
 315    prim_info.elts = draw_elts;
 316    prim_info.prim = fpme->input_prim;
 317    prim_info.flags = prim_flags;
 318    prim_info.primitive_count = 1;
 319    prim_info.primitive_lengths = &draw_count;
 320
 321    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 322 }
 323
 324
 325 static void llvm_middle_end_linear_run( struct draw_pt_middle_end *middle,
 326                                        unsigned start,
 327                                        unsigned count,
 328                                        unsigned prim_flags)
 329 {
 330    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 331    struct draw_fetch_info fetch_info;
 332    struct draw_prim_info prim_info;
 333
 334    fetch_info.linear = TRUE;
 335    fetch_info.start = start;
 336    fetch_info.count = count;
 337    fetch_info.elts = NULL;
 338
 339    prim_info.linear = TRUE;
 340    prim_info.start = 0;
 341    prim_info.count = count;
 342    prim_info.elts = NULL;
 343    prim_info.prim = fpme->input_prim;
 344    prim_info.flags = prim_flags;
 345    prim_info.primitive_count = 1;
 346    prim_info.primitive_lengths = &count;
 347
 348    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 349 }
 350
 351
 352
 353 static boolean
 354 llvm_middle_end_linear_run_elts( struct draw_pt_middle_end *middle,
 355                                  unsigned start,
 356                                  unsigned count,
 357                                  const ushort *draw_elts,
 358                                  unsigned draw_count,
 359                                  unsigned prim_flags )
 360 {
 361    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 362    struct draw_fetch_info fetch_info;
 363    struct draw_prim_info prim_info;
 364
 365    fetch_info.linear = TRUE;
 366    fetch_info.start = start;
 367    fetch_info.count = count;
 368    fetch_info.elts = NULL;
 369
 370    prim_info.linear = FALSE;
 371    prim_info.start = 0;
 372    prim_info.count = draw_count;
 373    prim_info.elts = draw_elts;
 374    prim_info.prim = fpme->input_prim;
 375    prim_info.flags = prim_flags;
 376    prim_info.primitive_count = 1;
 377    prim_info.primitive_lengths = &draw_count;
 378
 379    llvm_pipeline_generic( middle, &fetch_info, &prim_info );
 380
 381    return TRUE;
 382 }
 383
 384
 385
 386 static void llvm_middle_end_finish( struct draw_pt_middle_end *middle )
 387 {
 388    /* nothing to do */
 389 }
 390
 391 static void llvm_middle_end_destroy( struct draw_pt_middle_end *middle )
 392 {
 393    struct llvm_middle_end *fpme = (struct llvm_middle_end *)middle;
 394
 395    if (fpme->fetch)
 396       draw_pt_fetch_destroy( fpme->fetch );
 397
 398    if (fpme->emit)
 399       draw_pt_emit_destroy( fpme->emit );
 400
 401    if (fpme->so_emit)
 402       draw_pt_so_emit_destroy( fpme->so_emit );
 403
 404    if (fpme->post_vs)
 405       draw_pt_post_vs_destroy( fpme->post_vs );
 406
 407    FREE(middle);
 408 }
 409
 410
 411 struct draw_pt_middle_end *
 412 draw_pt_fetch_pipeline_or_emit_llvm(struct draw_context *draw)
 413 {
 414    struct llvm_middle_end *fpme = 0;
 415
 416    if (!draw->engine)
 417       return NULL;
 418
 419    fpme = CALLOC_STRUCT( llvm_middle_end );
 420    if (!fpme)
 421       goto fail;
 422
 423    fpme->base.prepare         = llvm_middle_end_prepare;
 424    fpme->base.run             = llvm_middle_end_run;
 425    fpme->base.run_linear      = llvm_middle_end_linear_run;
 426    fpme->base.run_linear_elts = llvm_middle_end_linear_run_elts;
 427    fpme->base.finish          = llvm_middle_end_finish;
 428    fpme->base.destroy         = llvm_middle_end_destroy;
 429
 430    fpme->draw = draw;
 431
 432    fpme->fetch = draw_pt_fetch_create( draw );
 433    if (!fpme->fetch)
 434       goto fail;
 435
 436    fpme->post_vs = draw_pt_post_vs_create( draw );
 437    if (!fpme->post_vs)
 438       goto fail;
 439
 440    fpme->emit = draw_pt_emit_create( draw );
 441    if (!fpme->emit)
 442       goto fail;
 443
 444    fpme->so_emit = draw_pt_so_emit_create( draw );
 445    if (!fpme->so_emit)
 446       goto fail;
 447
 448    fpme->llvm = draw->llvm;
 449    if (!fpme->llvm)
 450       goto fail;
 451
 452    fpme->current_variant = NULL;
 453
 454    return &fpme->base;
 455
 456  fail:
 457    if (fpme)
 458       llvm_middle_end_destroy( &fpme->base );
 459
 460    return NULL;
 461 }