src/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() 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    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  49 }
  50
  51 bool ast_type_qualifier::has_interpolation() const
  52 {
  53    return this->flags.q.smooth
  54           || this->flags.q.flat
  55           || this->flags.q.noperspective;
  56 }
  57
  58 bool
  59 ast_type_qualifier::has_layout() const
  60 {
  61    return this->flags.q.origin_upper_left
  62           || this->flags.q.pixel_center_integer
  63           || this->flags.q.depth_any
  64           || this->flags.q.depth_greater
  65           || this->flags.q.depth_less
  66           || this->flags.q.depth_unchanged
  67           || this->flags.q.std140
  68           || this->flags.q.std430
  69           || this->flags.q.shared
  70           || this->flags.q.column_major
  71           || this->flags.q.row_major
  72           || this->flags.q.packed
  73           || this->flags.q.explicit_location
  74           || this->flags.q.explicit_index
  75           || this->flags.q.explicit_binding
  76           || this->flags.q.explicit_offset;
  77 }
  78
  79 bool
  80 ast_type_qualifier::has_storage() const
  81 {
  82    return this->flags.q.constant
  83           || this->flags.q.attribute
  84           || this->flags.q.varying
  85           || this->flags.q.in
  86           || this->flags.q.out
  87           || this->flags.q.uniform
  88           || this->flags.q.buffer
  89           || this->flags.q.shared_storage;
  90 }
  91
  92 bool
  93 ast_type_qualifier::has_auxiliary_storage() const
  94 {
  95    return this->flags.q.centroid
  96           || this->flags.q.sample
  97           || this->flags.q.patch;
  98 }
  99
 100 const char*
 101 ast_type_qualifier::interpolation_string() const
 102 {
 103    if (this->flags.q.smooth)
 104       return "smooth";
 105    else if (this->flags.q.flat)
 106       return "flat";
 107    else if (this->flags.q.noperspective)
 108       return "noperspective";
 109    else
 110       return NULL;
 111 }
 112
 113 bool
 114 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 115                                     _mesa_glsl_parse_state *state,
 116                                     ast_type_qualifier q)
 117 {
 118    ast_type_qualifier ubo_mat_mask;
 119    ubo_mat_mask.flags.i = 0;
 120    ubo_mat_mask.flags.q.row_major = 1;
 121    ubo_mat_mask.flags.q.column_major = 1;
 122
 123    ast_type_qualifier ubo_layout_mask;
 124    ubo_layout_mask.flags.i = 0;
 125    ubo_layout_mask.flags.q.std140 = 1;
 126    ubo_layout_mask.flags.q.packed = 1;
 127    ubo_layout_mask.flags.q.shared = 1;
 128    ubo_layout_mask.flags.q.std430 = 1;
 129
 130    ast_type_qualifier ubo_binding_mask;
 131    ubo_binding_mask.flags.i = 0;
 132    ubo_binding_mask.flags.q.explicit_binding = 1;
 133    ubo_binding_mask.flags.q.explicit_offset = 1;
 134
 135    ast_type_qualifier stream_layout_mask;
 136    stream_layout_mask.flags.i = 0;
 137    stream_layout_mask.flags.q.stream = 1;
 138
 139    /* Uniform block layout qualifiers get to overwrite each
 140     * other (rightmost having priority), while all other
 141     * qualifiers currently don't allow duplicates.
 142     */
 143    ast_type_qualifier allowed_duplicates_mask;
 144    allowed_duplicates_mask.flags.i =
 145       ubo_mat_mask.flags.i |
 146       ubo_layout_mask.flags.i |
 147       ubo_binding_mask.flags.i;
 148
 149    /* Geometry shaders can have several layout qualifiers
 150     * assigning different stream values.
 151     */
 152    if (state->stage == MESA_SHADER_GEOMETRY)
 153       allowed_duplicates_mask.flags.i |=
 154          stream_layout_mask.flags.i;
 155
 156    if ((this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 157       _mesa_glsl_error(loc, state,
 158                        "duplicate layout qualifiers used");
 159       return false;
 160    }
 161
 162    if (q.flags.q.prim_type) {
 163       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 164          _mesa_glsl_error(loc, state,
 165                           "conflicting primitive type qualifiers used");
 166          return false;
 167       }
 168       this->prim_type = q.prim_type;
 169    }
 170
 171    if (q.flags.q.max_vertices) {
 172       if (this->flags.q.max_vertices && this->max_vertices != q.max_vertices) {
 173          _mesa_glsl_error(loc, state,
 174                           "geometry shader set conflicting max_vertices "
 175                           "(%d and %d)", this->max_vertices, q.max_vertices);
 176          return false;
 177       }
 178       this->max_vertices = q.max_vertices;
 179    }
 180
 181    if (q.flags.q.invocations) {
 182       if (this->flags.q.invocations && this->invocations != q.invocations) {
 183          _mesa_glsl_error(loc, state,
 184                           "geometry shader set conflicting invocations "
 185                           "(%d and %d)", this->invocations, q.invocations);
 186          return false;
 187       }
 188       this->invocations = q.invocations;
 189    }
 190
 191    if (state->stage == MESA_SHADER_GEOMETRY &&
 192        state->has_explicit_attrib_stream()) {
 193       if (!this->flags.q.explicit_stream) {
 194          if (q.flags.q.stream) {
 195             this->flags.q.stream = 1;
 196             this->stream = q.stream;
 197          } else if (!this->flags.q.stream && this->flags.q.out) {
 198             /* Assign default global stream value */
 199             this->flags.q.stream = 1;
 200             this->stream = state->out_qualifier->stream;
 201          }
 202       } else {
 203          if (q.flags.q.explicit_stream) {
 204             _mesa_glsl_error(loc, state,
 205                              "duplicate layout `stream' qualifier");
 206          }
 207       }
 208    }
 209
 210    if (q.flags.q.vertices) {
 211       if (this->flags.q.vertices && this->vertices != q.vertices) {
 212          _mesa_glsl_error(loc, state,
 213                           "tessellation control shader set conflicting "
 214                           "vertices (%d and %d)",
 215                           this->vertices, q.vertices);
 216          return false;
 217       }
 218       this->vertices = q.vertices;
 219    }
 220
 221    if (q.flags.q.vertex_spacing) {
 222       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 223          _mesa_glsl_error(loc, state,
 224                           "conflicting vertex spacing used");
 225          return false;
 226       }
 227       this->vertex_spacing = q.vertex_spacing;
 228    }
 229
 230    if (q.flags.q.ordering) {
 231       if (this->flags.q.ordering && this->ordering != q.ordering) {
 232          _mesa_glsl_error(loc, state,
 233                           "conflicting ordering used");
 234          return false;
 235       }
 236       this->ordering = q.ordering;
 237    }
 238
 239    if (q.flags.q.point_mode) {
 240       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 241          _mesa_glsl_error(loc, state,
 242                           "conflicting point mode used");
 243          return false;
 244       }
 245       this->point_mode = q.point_mode;
 246    }
 247
 248    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 249       this->flags.i &= ~ubo_mat_mask.flags.i;
 250    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 251       this->flags.i &= ~ubo_layout_mask.flags.i;
 252
 253    for (int i = 0; i < 3; i++) {
 254       if (q.flags.q.local_size & (1 << i)) {
 255          if ((this->flags.q.local_size & (1 << i)) &&
 256              this->local_size[i] != q.local_size[i]) {
 257             _mesa_glsl_error(loc, state,
 258                              "compute shader set conflicting values for "
 259                              "local_size_%c (%d and %d)", 'x' + i,
 260                              this->local_size[i], q.local_size[i]);
 261             return false;
 262          }
 263          this->local_size[i] = q.local_size[i];
 264       }
 265    }
 266
 267    this->flags.i |= q.flags.i;
 268
 269    if (q.flags.q.explicit_location)
 270       this->location = q.location;
 271
 272    if (q.flags.q.explicit_index)
 273       this->index = q.index;
 274
 275    if (q.flags.q.explicit_binding)
 276       this->binding = q.binding;
 277
 278    if (q.flags.q.explicit_offset)
 279       this->offset = q.offset;
 280
 281    if (q.precision != ast_precision_none)
 282       this->precision = q.precision;
 283
 284    if (q.flags.q.explicit_image_format) {
 285       this->image_format = q.image_format;
 286       this->image_base_type = q.image_base_type;
 287    }
 288
 289    return true;
 290 }
 291
 292 bool
 293 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 294                                         _mesa_glsl_parse_state *state,
 295                                         ast_type_qualifier q,
 296                                         ast_node* &node)
 297 {
 298    void *mem_ctx = state;
 299    const bool r = this->merge_qualifier(loc, state, q);
 300
 301    if (state->stage == MESA_SHADER_TESS_CTRL) {
 302       node = new(mem_ctx) ast_tcs_output_layout(*loc, q.vertices);
 303    }
 304
 305    return r;
 306 }
 307
 308 bool
 309 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 310                                        _mesa_glsl_parse_state *state,
 311                                        ast_type_qualifier q,
 312                                        ast_node* &node)
 313 {
 314    void *mem_ctx = state;
 315    bool create_gs_ast = false;
 316    bool create_cs_ast = false;
 317    ast_type_qualifier valid_in_mask;
 318    valid_in_mask.flags.i = 0;
 319
 320    switch (state->stage) {
 321    case MESA_SHADER_TESS_EVAL:
 322       if (q.flags.q.prim_type) {
 323          /* Make sure this is a valid input primitive type. */
 324          switch (q.prim_type) {
 325          case GL_TRIANGLES:
 326          case GL_QUADS:
 327          case GL_ISOLINES:
 328             break;
 329          default:
 330             _mesa_glsl_error(loc, state,
 331                              "invalid tessellation evaluation "
 332                              "shader input primitive type");
 333             break;
 334          }
 335       }
 336
 337       valid_in_mask.flags.q.prim_type = 1;
 338       valid_in_mask.flags.q.vertex_spacing = 1;
 339       valid_in_mask.flags.q.ordering = 1;
 340       valid_in_mask.flags.q.point_mode = 1;
 341       break;
 342    case MESA_SHADER_GEOMETRY:
 343       if (q.flags.q.prim_type) {
 344          /* Make sure this is a valid input primitive type. */
 345          switch (q.prim_type) {
 346          case GL_POINTS:
 347          case GL_LINES:
 348          case GL_LINES_ADJACENCY:
 349          case GL_TRIANGLES:
 350          case GL_TRIANGLES_ADJACENCY:
 351             break;
 352          default:
 353             _mesa_glsl_error(loc, state,
 354                              "invalid geometry shader input primitive type");
 355             break;
 356          }
 357       }
 358
 359       create_gs_ast |=
 360          q.flags.q.prim_type &&
 361          !state->in_qualifier->flags.q.prim_type;
 362
 363       valid_in_mask.flags.q.prim_type = 1;
 364       valid_in_mask.flags.q.invocations = 1;
 365       break;
 366    case MESA_SHADER_FRAGMENT:
 367       valid_in_mask.flags.q.early_fragment_tests = 1;
 368       break;
 369    case MESA_SHADER_COMPUTE:
 370       create_cs_ast |=
 371          q.flags.q.local_size != 0 &&
 372          state->in_qualifier->flags.q.local_size == 0;
 373
 374       valid_in_mask.flags.q.local_size = 7;
 375       break;
 376    default:
 377       _mesa_glsl_error(loc, state,
 378                        "input layout qualifiers only valid in "
 379                        "geometry, fragment and compute shaders");
 380       break;
 381    }
 382
 383    /* Generate an error when invalid input layout qualifiers are used. */
 384    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 385       _mesa_glsl_error(loc, state,
 386                        "invalid input layout qualifiers used");
 387       return false;
 388    }
 389
 390    /* Input layout qualifiers can be specified multiple
 391     * times in separate declarations, as long as they match.
 392     */
 393    if (this->flags.q.prim_type) {
 394       if (q.flags.q.prim_type &&
 395           this->prim_type != q.prim_type) {
 396          _mesa_glsl_error(loc, state,
 397                           "conflicting input primitive %s specified",
 398                           state->stage == MESA_SHADER_GEOMETRY ?
 399                           "type" : "mode");
 400       }
 401    } else if (q.flags.q.prim_type) {
 402       state->in_qualifier->flags.q.prim_type = 1;
 403       state->in_qualifier->prim_type = q.prim_type;
 404    }
 405
 406    if (this->flags.q.invocations &&
 407        q.flags.q.invocations &&
 408        this->invocations != q.invocations) {
 409       _mesa_glsl_error(loc, state,
 410                        "conflicting invocations counts specified");
 411       return false;
 412    } else if (q.flags.q.invocations) {
 413       this->flags.q.invocations = 1;
 414       this->invocations = q.invocations;
 415    }
 416
 417    if (q.flags.q.early_fragment_tests) {
 418       state->fs_early_fragment_tests = true;
 419    }
 420
 421    if (this->flags.q.vertex_spacing) {
 422       if (q.flags.q.vertex_spacing &&
 423           this->vertex_spacing != q.vertex_spacing) {
 424          _mesa_glsl_error(loc, state,
 425                           "conflicting vertex spacing specified");
 426       }
 427    } else if (q.flags.q.vertex_spacing) {
 428       this->flags.q.vertex_spacing = 1;
 429       this->vertex_spacing = q.vertex_spacing;
 430    }
 431
 432    if (this->flags.q.ordering) {
 433       if (q.flags.q.ordering &&
 434           this->ordering != q.ordering) {
 435          _mesa_glsl_error(loc, state,
 436                           "conflicting ordering specified");
 437       }
 438    } else if (q.flags.q.ordering) {
 439       this->flags.q.ordering = 1;
 440       this->ordering = q.ordering;
 441    }
 442
 443    if (this->flags.q.point_mode) {
 444       if (q.flags.q.point_mode &&
 445           this->point_mode != q.point_mode) {
 446          _mesa_glsl_error(loc, state,
 447                           "conflicting point mode specified");
 448       }
 449    } else if (q.flags.q.point_mode) {
 450       this->flags.q.point_mode = 1;
 451       this->point_mode = q.point_mode;
 452    }
 453
 454    if (create_gs_ast) {
 455       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 456    } else if (create_cs_ast) {
 457       /* Infer a local_size of 1 for every unspecified dimension */
 458       unsigned local_size[3];
 459       for (int i = 0; i < 3; i++) {
 460          if (q.flags.q.local_size & (1 << i))
 461             local_size[i] = q.local_size[i];
 462          else
 463             local_size[i] = 1;
 464       }
 465       node = new(mem_ctx) ast_cs_input_layout(*loc, local_size);
 466    }
 467
 468    return true;
 469 }
 470
 471 bool
 472 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 473                                                   const char *qual_indentifier,
 474                                                   unsigned *value,
 475                                                   bool can_be_zero)
 476 {
 477    int min_value = 0;
 478    bool first_pass = true;
 479    *value = 0;
 480
 481    if (!can_be_zero)
 482       min_value = 1;
 483
 484    for (exec_node *node = layout_const_expressions.head;
 485            !node->is_tail_sentinel(); node = node->next) {
 486
 487       exec_list dummy_instructions;
 488       ast_node *const_expression = exec_node_data(ast_node, node, link);
 489
 490       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 491
 492       ir_constant *const const_int = ir->constant_expression_value();
 493       if (const_int == NULL || !const_int->type->is_integer()) {
 494          YYLTYPE loc = const_expression->get_location();
 495          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 496                           "expression", qual_indentifier);
 497          return false;
 498       }
 499
 500       if (const_int->value.i[0] < min_value) {
 501          YYLTYPE loc = const_expression->get_location();
 502          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 503                           "(%d < %d)", qual_indentifier,
 504                           const_int->value.i[0], min_value);
 505          return false;
 506       }
 507
 508       if (!first_pass && *value != const_int->value.u[0]) {
 509          YYLTYPE loc = const_expression->get_location();
 510          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 511                           "match previous declaration (%d vs %d)",
 512                           qual_indentifier, *value, const_int->value.i[0]);
 513          return false;
 514       } else {
 515          first_pass = false;
 516          *value = const_int->value.u[0];
 517       }
 518
 519       /* If the location is const (and we've verified that
 520        * it is) then no instructions should have been emitted
 521        * when we converted it to HIR. If they were emitted,
 522        * then either the location isn't const after all, or
 523        * we are emitting unnecessary instructions.
 524        */
 525       assert(dummy_instructions.is_empty());
 526    }
 527
 528    return true;
 529 }