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->max_vertices) {
 173          this->max_vertices->merge_qualifier(q.max_vertices);
 174       } else {
 175          this->max_vertices = q.max_vertices;
 176       }
 177    }
 178
 179    if (q.flags.q.invocations) {
 180       if (this->invocations) {
 181          this->invocations->merge_qualifier(q.invocations);
 182       } else {
 183          this->invocations = q.invocations;
 184       }
 185    }
 186
 187    if (state->stage == MESA_SHADER_GEOMETRY &&
 188        state->has_explicit_attrib_stream()) {
 189       if (!this->flags.q.explicit_stream) {
 190          if (q.flags.q.stream) {
 191             this->flags.q.stream = 1;
 192             this->stream = q.stream;
 193          } else if (!this->flags.q.stream && this->flags.q.out) {
 194             /* Assign default global stream value */
 195             this->flags.q.stream = 1;
 196             this->stream = state->out_qualifier->stream;
 197          }
 198       } else {
 199          if (q.flags.q.explicit_stream) {
 200             _mesa_glsl_error(loc, state,
 201                              "duplicate layout `stream' qualifier");
 202          }
 203       }
 204    }
 205
 206    if (q.flags.q.vertices) {
 207       if (this->vertices) {
 208          this->vertices->merge_qualifier(q.vertices);
 209       } else {
 210          this->vertices = q.vertices;
 211       }
 212    }
 213
 214    if (q.flags.q.vertex_spacing) {
 215       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 216          _mesa_glsl_error(loc, state,
 217                           "conflicting vertex spacing used");
 218          return false;
 219       }
 220       this->vertex_spacing = q.vertex_spacing;
 221    }
 222
 223    if (q.flags.q.ordering) {
 224       if (this->flags.q.ordering && this->ordering != q.ordering) {
 225          _mesa_glsl_error(loc, state,
 226                           "conflicting ordering used");
 227          return false;
 228       }
 229       this->ordering = q.ordering;
 230    }
 231
 232    if (q.flags.q.point_mode) {
 233       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 234          _mesa_glsl_error(loc, state,
 235                           "conflicting point mode used");
 236          return false;
 237       }
 238       this->point_mode = q.point_mode;
 239    }
 240
 241    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 242       this->flags.i &= ~ubo_mat_mask.flags.i;
 243    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 244       this->flags.i &= ~ubo_layout_mask.flags.i;
 245
 246    for (int i = 0; i < 3; i++) {
 247       if (q.flags.q.local_size & (1 << i)) {
 248          if (this->local_size[i]) {
 249             this->local_size[i]->merge_qualifier(q.local_size[i]);
 250          } else {
 251             this->local_size[i] = q.local_size[i];
 252          }
 253       }
 254    }
 255
 256    this->flags.i |= q.flags.i;
 257
 258    if (q.flags.q.explicit_location)
 259       this->location = q.location;
 260
 261    if (q.flags.q.explicit_index)
 262       this->index = q.index;
 263
 264    if (q.flags.q.explicit_binding)
 265       this->binding = q.binding;
 266
 267    if (q.flags.q.explicit_offset)
 268       this->offset = q.offset;
 269
 270    if (q.precision != ast_precision_none)
 271       this->precision = q.precision;
 272
 273    if (q.flags.q.explicit_image_format) {
 274       this->image_format = q.image_format;
 275       this->image_base_type = q.image_base_type;
 276    }
 277
 278    return true;
 279 }
 280
 281 bool
 282 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 283                                         _mesa_glsl_parse_state *state,
 284                                         ast_type_qualifier q,
 285                                         ast_node* &node)
 286 {
 287    void *mem_ctx = state;
 288    const bool r = this->merge_qualifier(loc, state, q);
 289
 290    if (state->stage == MESA_SHADER_TESS_CTRL) {
 291       node = new(mem_ctx) ast_tcs_output_layout(*loc);
 292    }
 293
 294    return r;
 295 }
 296
 297 bool
 298 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 299                                        _mesa_glsl_parse_state *state,
 300                                        ast_type_qualifier q,
 301                                        ast_node* &node)
 302 {
 303    void *mem_ctx = state;
 304    bool create_gs_ast = false;
 305    bool create_cs_ast = false;
 306    ast_type_qualifier valid_in_mask;
 307    valid_in_mask.flags.i = 0;
 308
 309    switch (state->stage) {
 310    case MESA_SHADER_TESS_EVAL:
 311       if (q.flags.q.prim_type) {
 312          /* Make sure this is a valid input primitive type. */
 313          switch (q.prim_type) {
 314          case GL_TRIANGLES:
 315          case GL_QUADS:
 316          case GL_ISOLINES:
 317             break;
 318          default:
 319             _mesa_glsl_error(loc, state,
 320                              "invalid tessellation evaluation "
 321                              "shader input primitive type");
 322             break;
 323          }
 324       }
 325
 326       valid_in_mask.flags.q.prim_type = 1;
 327       valid_in_mask.flags.q.vertex_spacing = 1;
 328       valid_in_mask.flags.q.ordering = 1;
 329       valid_in_mask.flags.q.point_mode = 1;
 330       break;
 331    case MESA_SHADER_GEOMETRY:
 332       if (q.flags.q.prim_type) {
 333          /* Make sure this is a valid input primitive type. */
 334          switch (q.prim_type) {
 335          case GL_POINTS:
 336          case GL_LINES:
 337          case GL_LINES_ADJACENCY:
 338          case GL_TRIANGLES:
 339          case GL_TRIANGLES_ADJACENCY:
 340             break;
 341          default:
 342             _mesa_glsl_error(loc, state,
 343                              "invalid geometry shader input primitive type");
 344             break;
 345          }
 346       }
 347
 348       create_gs_ast |=
 349          q.flags.q.prim_type &&
 350          !state->in_qualifier->flags.q.prim_type;
 351
 352       valid_in_mask.flags.q.prim_type = 1;
 353       valid_in_mask.flags.q.invocations = 1;
 354       break;
 355    case MESA_SHADER_FRAGMENT:
 356       valid_in_mask.flags.q.early_fragment_tests = 1;
 357       break;
 358    case MESA_SHADER_COMPUTE:
 359       create_cs_ast |=
 360          q.flags.q.local_size != 0 &&
 361          state->in_qualifier->flags.q.local_size == 0;
 362
 363       valid_in_mask.flags.q.local_size = 7;
 364       break;
 365    default:
 366       _mesa_glsl_error(loc, state,
 367                        "input layout qualifiers only valid in "
 368                        "geometry, fragment and compute shaders");
 369       break;
 370    }
 371
 372    /* Generate an error when invalid input layout qualifiers are used. */
 373    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 374       _mesa_glsl_error(loc, state,
 375                        "invalid input layout qualifiers used");
 376       return false;
 377    }
 378
 379    /* Input layout qualifiers can be specified multiple
 380     * times in separate declarations, as long as they match.
 381     */
 382    if (this->flags.q.prim_type) {
 383       if (q.flags.q.prim_type &&
 384           this->prim_type != q.prim_type) {
 385          _mesa_glsl_error(loc, state,
 386                           "conflicting input primitive %s specified",
 387                           state->stage == MESA_SHADER_GEOMETRY ?
 388                           "type" : "mode");
 389       }
 390    } else if (q.flags.q.prim_type) {
 391       state->in_qualifier->flags.q.prim_type = 1;
 392       state->in_qualifier->prim_type = q.prim_type;
 393    }
 394
 395    if (q.flags.q.invocations) {
 396       this->flags.q.invocations = 1;
 397       if (this->invocations) {
 398          this->invocations->merge_qualifier(q.invocations);
 399       } else {
 400          this->invocations = q.invocations;
 401       }
 402    }
 403
 404    if (q.flags.q.early_fragment_tests) {
 405       state->fs_early_fragment_tests = true;
 406    }
 407
 408    if (this->flags.q.vertex_spacing) {
 409       if (q.flags.q.vertex_spacing &&
 410           this->vertex_spacing != q.vertex_spacing) {
 411          _mesa_glsl_error(loc, state,
 412                           "conflicting vertex spacing specified");
 413       }
 414    } else if (q.flags.q.vertex_spacing) {
 415       this->flags.q.vertex_spacing = 1;
 416       this->vertex_spacing = q.vertex_spacing;
 417    }
 418
 419    if (this->flags.q.ordering) {
 420       if (q.flags.q.ordering &&
 421           this->ordering != q.ordering) {
 422          _mesa_glsl_error(loc, state,
 423                           "conflicting ordering specified");
 424       }
 425    } else if (q.flags.q.ordering) {
 426       this->flags.q.ordering = 1;
 427       this->ordering = q.ordering;
 428    }
 429
 430    if (this->flags.q.point_mode) {
 431       if (q.flags.q.point_mode &&
 432           this->point_mode != q.point_mode) {
 433          _mesa_glsl_error(loc, state,
 434                           "conflicting point mode specified");
 435       }
 436    } else if (q.flags.q.point_mode) {
 437       this->flags.q.point_mode = 1;
 438       this->point_mode = q.point_mode;
 439    }
 440
 441    if (create_gs_ast) {
 442       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 443    } else if (create_cs_ast) {
 444       node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 445    }
 446
 447    return true;
 448 }
 449
 450 bool
 451 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 452                                                   const char *qual_indentifier,
 453                                                   unsigned *value,
 454                                                   bool can_be_zero)
 455 {
 456    int min_value = 0;
 457    bool first_pass = true;
 458    *value = 0;
 459
 460    if (!can_be_zero)
 461       min_value = 1;
 462
 463    for (exec_node *node = layout_const_expressions.head;
 464            !node->is_tail_sentinel(); node = node->next) {
 465
 466       exec_list dummy_instructions;
 467       ast_node *const_expression = exec_node_data(ast_node, node, link);
 468
 469       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 470
 471       ir_constant *const const_int = ir->constant_expression_value();
 472       if (const_int == NULL || !const_int->type->is_integer()) {
 473          YYLTYPE loc = const_expression->get_location();
 474          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 475                           "expression", qual_indentifier);
 476          return false;
 477       }
 478
 479       if (const_int->value.i[0] < min_value) {
 480          YYLTYPE loc = const_expression->get_location();
 481          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 482                           "(%d < %d)", qual_indentifier,
 483                           const_int->value.i[0], min_value);
 484          return false;
 485       }
 486
 487       if (!first_pass && *value != const_int->value.u[0]) {
 488          YYLTYPE loc = const_expression->get_location();
 489          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 490                           "match previous declaration (%d vs %d)",
 491                           qual_indentifier, *value, const_int->value.i[0]);
 492          return false;
 493       } else {
 494          first_pass = false;
 495          *value = const_int->value.u[0];
 496       }
 497
 498       /* If the location is const (and we've verified that
 499        * it is) then no instructions should have been emitted
 500        * when we converted it to HIR. If they were emitted,
 501        * then either the location isn't const after all, or
 502        * we are emitting unnecessary instructions.
 503        */
 504       assert(dummy_instructions.is_empty());
 505    }
 506
 507    return true;
 508 }