src/compiler/glsl/ast_type.cpp

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "ast.h"
  25
  26 void
  27 ast_type_specifier::print(void) const
  28 {
  29    if (structure) {
  30       structure->print();
  31    } else {
  32       printf("%s ", type_name);
  33    }
  34
  35    if (array_specifier) {
  36       array_specifier->print();
  37    }
  38 }
  39
  40 bool
  41 ast_fully_specified_type::has_qualifiers(_mesa_glsl_parse_state *state) const
  42 {
  43    /* 'subroutine' isnt a real qualifier. */
  44    ast_type_qualifier subroutine_only;
  45    subroutine_only.flags.i = 0;
  46    subroutine_only.flags.q.subroutine = 1;
  47    subroutine_only.flags.q.subroutine_def = 1;
  48    if (state->has_explicit_uniform_location()) {
  49       subroutine_only.flags.q.explicit_index = 1;
  50    }
  51    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  52 }
  53
  54 bool ast_type_qualifier::has_interpolation() const
  55 {
  56    return this->flags.q.smooth
  57           || this->flags.q.flat
  58           || this->flags.q.noperspective;
  59 }
  60
  61 bool
  62 ast_type_qualifier::has_layout() const
  63 {
  64    return this->flags.q.origin_upper_left
  65           || this->flags.q.pixel_center_integer
  66           || this->flags.q.depth_any
  67           || this->flags.q.depth_greater
  68           || this->flags.q.depth_less
  69           || this->flags.q.depth_unchanged
  70           || this->flags.q.std140
  71           || this->flags.q.std430
  72           || this->flags.q.shared
  73           || this->flags.q.column_major
  74           || this->flags.q.row_major
  75           || this->flags.q.packed
  76           || this->flags.q.explicit_location
  77           || this->flags.q.explicit_image_format
  78           || this->flags.q.explicit_index
  79           || this->flags.q.explicit_binding
  80           || this->flags.q.explicit_offset
  81           || this->flags.q.explicit_stream;
  82 }
  83
  84 bool
  85 ast_type_qualifier::has_storage() const
  86 {
  87    return this->flags.q.constant
  88           || this->flags.q.attribute
  89           || this->flags.q.varying
  90           || this->flags.q.in
  91           || this->flags.q.out
  92           || this->flags.q.uniform
  93           || this->flags.q.buffer
  94           || this->flags.q.shared_storage;
  95 }
  96
  97 bool
  98 ast_type_qualifier::has_auxiliary_storage() const
  99 {
 100    return this->flags.q.centroid
 101           || this->flags.q.sample
 102           || this->flags.q.patch;
 103 }
 104
 105 /**
 106  * This function merges both duplicate identifies within a single layout and
 107  * multiple layout qualifiers on a single variable declaration. The
 108  * is_single_layout_merge param is used differentiate between the two.
 109  */
 110 bool
 111 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 112                                     _mesa_glsl_parse_state *state,
 113                                     const ast_type_qualifier &q,
 114                                     bool is_single_layout_merge)
 115 {
 116    ast_type_qualifier ubo_mat_mask;
 117    ubo_mat_mask.flags.i = 0;
 118    ubo_mat_mask.flags.q.row_major = 1;
 119    ubo_mat_mask.flags.q.column_major = 1;
 120
 121    ast_type_qualifier ubo_layout_mask;
 122    ubo_layout_mask.flags.i = 0;
 123    ubo_layout_mask.flags.q.std140 = 1;
 124    ubo_layout_mask.flags.q.packed = 1;
 125    ubo_layout_mask.flags.q.shared = 1;
 126    ubo_layout_mask.flags.q.std430 = 1;
 127
 128    ast_type_qualifier ubo_binding_mask;
 129    ubo_binding_mask.flags.i = 0;
 130    ubo_binding_mask.flags.q.explicit_binding = 1;
 131    ubo_binding_mask.flags.q.explicit_offset = 1;
 132
 133    ast_type_qualifier stream_layout_mask;
 134    stream_layout_mask.flags.i = 0;
 135    stream_layout_mask.flags.q.stream = 1;
 136
 137    /* Uniform block layout qualifiers get to overwrite each
 138     * other (rightmost having priority), while all other
 139     * qualifiers currently don't allow duplicates.
 140     */
 141    ast_type_qualifier allowed_duplicates_mask;
 142    allowed_duplicates_mask.flags.i =
 143       ubo_mat_mask.flags.i |
 144       ubo_layout_mask.flags.i |
 145       ubo_binding_mask.flags.i;
 146
 147    /* Geometry shaders can have several layout qualifiers
 148     * assigning different stream values.
 149     */
 150    if (state->stage == MESA_SHADER_GEOMETRY)
 151       allowed_duplicates_mask.flags.i |=
 152          stream_layout_mask.flags.i;
 153
 154    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 155        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 156       _mesa_glsl_error(loc, state,
 157                        "duplicate layout qualifiers used");
 158       return false;
 159    }
 160
 161    if (q.flags.q.prim_type) {
 162       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 163          _mesa_glsl_error(loc, state,
 164                           "conflicting primitive type qualifiers used");
 165          return false;
 166       }
 167       this->prim_type = q.prim_type;
 168    }
 169
 170    if (q.flags.q.max_vertices) {
 171       if (this->max_vertices) {
 172          this->max_vertices->merge_qualifier(q.max_vertices);
 173       } else {
 174          this->max_vertices = q.max_vertices;
 175       }
 176    }
 177
 178    if (q.flags.q.subroutine_def) {
 179       if (this->flags.q.subroutine_def) {
 180          _mesa_glsl_error(loc, state,
 181                           "conflicting subroutine qualifiers used");
 182       } else {
 183          this->subroutine_list = q.subroutine_list;
 184       }
 185    }
 186
 187    if (q.flags.q.invocations) {
 188       if (this->invocations) {
 189          this->invocations->merge_qualifier(q.invocations);
 190       } else {
 191          this->invocations = q.invocations;
 192       }
 193    }
 194
 195    if (state->stage == MESA_SHADER_GEOMETRY &&
 196        state->has_explicit_attrib_stream()) {
 197       if (!this->flags.q.explicit_stream) {
 198          if (q.flags.q.stream) {
 199             this->flags.q.stream = 1;
 200             this->stream = q.stream;
 201          } else if (!this->flags.q.stream && this->flags.q.out) {
 202             /* Assign default global stream value */
 203             this->flags.q.stream = 1;
 204             this->stream = state->out_qualifier->stream;
 205          }
 206       }
 207    }
 208
 209    if (q.flags.q.vertices) {
 210       if (this->vertices) {
 211          this->vertices->merge_qualifier(q.vertices);
 212       } else {
 213          this->vertices = q.vertices;
 214       }
 215    }
 216
 217    if (q.flags.q.vertex_spacing) {
 218       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 219          _mesa_glsl_error(loc, state,
 220                           "conflicting vertex spacing used");
 221          return false;
 222       }
 223       this->vertex_spacing = q.vertex_spacing;
 224    }
 225
 226    if (q.flags.q.ordering) {
 227       if (this->flags.q.ordering && this->ordering != q.ordering) {
 228          _mesa_glsl_error(loc, state,
 229                           "conflicting ordering used");
 230          return false;
 231       }
 232       this->ordering = q.ordering;
 233    }
 234
 235    if (q.flags.q.point_mode) {
 236       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 237          _mesa_glsl_error(loc, state,
 238                           "conflicting point mode used");
 239          return false;
 240       }
 241       this->point_mode = q.point_mode;
 242    }
 243
 244    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 245       this->flags.i &= ~ubo_mat_mask.flags.i;
 246    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 247       this->flags.i &= ~ubo_layout_mask.flags.i;
 248
 249    for (int i = 0; i < 3; i++) {
 250       if (q.flags.q.local_size & (1 << i)) {
 251          if (this->local_size[i]) {
 252             this->local_size[i]->merge_qualifier(q.local_size[i]);
 253          } else {
 254             this->local_size[i] = q.local_size[i];
 255          }
 256       }
 257    }
 258
 259    this->flags.i |= q.flags.i;
 260
 261    if (q.flags.q.explicit_location)
 262       this->location = q.location;
 263
 264    if (q.flags.q.explicit_index)
 265       this->index = q.index;
 266
 267    if (q.flags.q.explicit_binding)
 268       this->binding = q.binding;
 269
 270    if (q.flags.q.explicit_offset)
 271       this->offset = q.offset;
 272
 273    if (q.precision != ast_precision_none)
 274       this->precision = q.precision;
 275
 276    if (q.flags.q.explicit_image_format) {
 277       this->image_format = q.image_format;
 278       this->image_base_type = q.image_base_type;
 279    }
 280
 281    return true;
 282 }
 283
 284 bool
 285 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 286                                         _mesa_glsl_parse_state *state,
 287                                         const ast_type_qualifier &q,
 288                                         ast_node* &node, bool create_node)
 289 {
 290    void *mem_ctx = state;
 291    const bool r = this->merge_qualifier(loc, state, q, false);
 292
 293    if (state->stage == MESA_SHADER_GEOMETRY) {
 294       if (q.flags.q.prim_type) {
 295          /* Make sure this is a valid output primitive type. */
 296          switch (q.prim_type) {
 297          case GL_POINTS:
 298          case GL_LINE_STRIP:
 299          case GL_TRIANGLE_STRIP:
 300             break;
 301          default:
 302             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 303                              "primitive type");
 304             break;
 305          }
 306       }
 307
 308       /* Allow future assigments of global out's stream id value */
 309       this->flags.q.explicit_stream = 0;
 310    } else if (state->stage == MESA_SHADER_TESS_CTRL) {
 311       if (create_node) {
 312          node = new(mem_ctx) ast_tcs_output_layout(*loc);
 313       }
 314    } else {
 315       _mesa_glsl_error(loc, state, "out layout qualifiers only valid in "
 316                        "tessellation control or geometry shaders");
 317    }
 318
 319    return r;
 320 }
 321
 322 bool
 323 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 324                                        _mesa_glsl_parse_state *state,
 325                                        const ast_type_qualifier &q,
 326                                        ast_node* &node, bool create_node)
 327 {
 328    void *mem_ctx = state;
 329    bool create_gs_ast = false;
 330    bool create_cs_ast = false;
 331    ast_type_qualifier valid_in_mask;
 332    valid_in_mask.flags.i = 0;
 333
 334    switch (state->stage) {
 335    case MESA_SHADER_TESS_EVAL:
 336       if (q.flags.q.prim_type) {
 337          /* Make sure this is a valid input primitive type. */
 338          switch (q.prim_type) {
 339          case GL_TRIANGLES:
 340          case GL_QUADS:
 341          case GL_ISOLINES:
 342             break;
 343          default:
 344             _mesa_glsl_error(loc, state,
 345                              "invalid tessellation evaluation "
 346                              "shader input primitive type");
 347             break;
 348          }
 349       }
 350
 351       valid_in_mask.flags.q.prim_type = 1;
 352       valid_in_mask.flags.q.vertex_spacing = 1;
 353       valid_in_mask.flags.q.ordering = 1;
 354       valid_in_mask.flags.q.point_mode = 1;
 355       break;
 356    case MESA_SHADER_GEOMETRY:
 357       if (q.flags.q.prim_type) {
 358          /* Make sure this is a valid input primitive type. */
 359          switch (q.prim_type) {
 360          case GL_POINTS:
 361          case GL_LINES:
 362          case GL_LINES_ADJACENCY:
 363          case GL_TRIANGLES:
 364          case GL_TRIANGLES_ADJACENCY:
 365             break;
 366          default:
 367             _mesa_glsl_error(loc, state,
 368                              "invalid geometry shader input primitive type");
 369             break;
 370          }
 371       }
 372
 373       create_gs_ast |=
 374          q.flags.q.prim_type &&
 375          !state->in_qualifier->flags.q.prim_type;
 376
 377       valid_in_mask.flags.q.prim_type = 1;
 378       valid_in_mask.flags.q.invocations = 1;
 379       break;
 380    case MESA_SHADER_FRAGMENT:
 381       valid_in_mask.flags.q.early_fragment_tests = 1;
 382       break;
 383    case MESA_SHADER_COMPUTE:
 384       create_cs_ast |=
 385          q.flags.q.local_size != 0 &&
 386          state->in_qualifier->flags.q.local_size == 0;
 387
 388       valid_in_mask.flags.q.local_size = 7;
 389       break;
 390    default:
 391       _mesa_glsl_error(loc, state,
 392                        "input layout qualifiers only valid in "
 393                        "geometry, fragment and compute shaders");
 394       break;
 395    }
 396
 397    /* Generate an error when invalid input layout qualifiers are used. */
 398    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 399       _mesa_glsl_error(loc, state,
 400                        "invalid input layout qualifiers used");
 401       return false;
 402    }
 403
 404    /* Input layout qualifiers can be specified multiple
 405     * times in separate declarations, as long as they match.
 406     */
 407    if (this->flags.q.prim_type) {
 408       if (q.flags.q.prim_type &&
 409           this->prim_type != q.prim_type) {
 410          _mesa_glsl_error(loc, state,
 411                           "conflicting input primitive %s specified",
 412                           state->stage == MESA_SHADER_GEOMETRY ?
 413                           "type" : "mode");
 414       }
 415    } else if (q.flags.q.prim_type) {
 416       state->in_qualifier->flags.q.prim_type = 1;
 417       state->in_qualifier->prim_type = q.prim_type;
 418    }
 419
 420    if (q.flags.q.invocations) {
 421       this->flags.q.invocations = 1;
 422       if (this->invocations) {
 423          this->invocations->merge_qualifier(q.invocations);
 424       } else {
 425          this->invocations = q.invocations;
 426       }
 427    }
 428
 429    if (q.flags.q.early_fragment_tests) {
 430       state->fs_early_fragment_tests = true;
 431    }
 432
 433    if (this->flags.q.vertex_spacing) {
 434       if (q.flags.q.vertex_spacing &&
 435           this->vertex_spacing != q.vertex_spacing) {
 436          _mesa_glsl_error(loc, state,
 437                           "conflicting vertex spacing specified");
 438       }
 439    } else if (q.flags.q.vertex_spacing) {
 440       this->flags.q.vertex_spacing = 1;
 441       this->vertex_spacing = q.vertex_spacing;
 442    }
 443
 444    if (this->flags.q.ordering) {
 445       if (q.flags.q.ordering &&
 446           this->ordering != q.ordering) {
 447          _mesa_glsl_error(loc, state,
 448                           "conflicting ordering specified");
 449       }
 450    } else if (q.flags.q.ordering) {
 451       this->flags.q.ordering = 1;
 452       this->ordering = q.ordering;
 453    }
 454
 455    if (this->flags.q.point_mode) {
 456       if (q.flags.q.point_mode &&
 457           this->point_mode != q.point_mode) {
 458          _mesa_glsl_error(loc, state,
 459                           "conflicting point mode specified");
 460       }
 461    } else if (q.flags.q.point_mode) {
 462       this->flags.q.point_mode = 1;
 463       this->point_mode = q.point_mode;
 464    }
 465
 466    if (create_node) {
 467       if (create_gs_ast) {
 468          node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 469       } else if (create_cs_ast) {
 470          node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 471       }
 472    }
 473
 474    return true;
 475 }
 476
 477 bool
 478 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 479                                                   const char *qual_indentifier,
 480                                                   unsigned *value,
 481                                                   bool can_be_zero)
 482 {
 483    int min_value = 0;
 484    bool first_pass = true;
 485    *value = 0;
 486
 487    if (!can_be_zero)
 488       min_value = 1;
 489
 490    for (exec_node *node = layout_const_expressions.head;
 491            !node->is_tail_sentinel(); node = node->next) {
 492
 493       exec_list dummy_instructions;
 494       ast_node *const_expression = exec_node_data(ast_node, node, link);
 495
 496       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 497
 498       ir_constant *const const_int = ir->constant_expression_value();
 499       if (const_int == NULL || !const_int->type->is_integer()) {
 500          YYLTYPE loc = const_expression->get_location();
 501          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 502                           "expression", qual_indentifier);
 503          return false;
 504       }
 505
 506       if (const_int->value.i[0] < min_value) {
 507          YYLTYPE loc = const_expression->get_location();
 508          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 509                           "(%d < %d)", qual_indentifier,
 510                           const_int->value.i[0], min_value);
 511          return false;
 512       }
 513
 514       if (!first_pass && *value != const_int->value.u[0]) {
 515          YYLTYPE loc = const_expression->get_location();
 516          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 517                           "match previous declaration (%d vs %d)",
 518                           qual_indentifier, *value, const_int->value.i[0]);
 519          return false;
 520       } else {
 521          first_pass = false;
 522          *value = const_int->value.u[0];
 523       }
 524
 525       /* If the location is const (and we've verified that
 526        * it is) then no instructions should have been emitted
 527        * when we converted it to HIR. If they were emitted,
 528        * then either the location isn't const after all, or
 529        * we are emitting unnecessary instructions.
 530        */
 531       assert(dummy_instructions.is_empty());
 532    }
 533
 534    return true;
 535 }