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 const char*
 106 ast_type_qualifier::interpolation_string() const
 107 {
 108    if (this->flags.q.smooth)
 109       return "smooth";
 110    else if (this->flags.q.flat)
 111       return "flat";
 112    else if (this->flags.q.noperspective)
 113       return "noperspective";
 114    else
 115       return NULL;
 116 }
 117
 118 /**
 119  * This function merges both duplicate identifies within a single layout and
 120  * multiple layout qualifiers on a single variable declaration. The
 121  * is_single_layout_merge param is used differentiate between the two.
 122  */
 123 bool
 124 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 125                                     _mesa_glsl_parse_state *state,
 126                                     const ast_type_qualifier &q,
 127                                     bool is_single_layout_merge)
 128 {
 129    ast_type_qualifier ubo_mat_mask;
 130    ubo_mat_mask.flags.i = 0;
 131    ubo_mat_mask.flags.q.row_major = 1;
 132    ubo_mat_mask.flags.q.column_major = 1;
 133
 134    ast_type_qualifier ubo_layout_mask;
 135    ubo_layout_mask.flags.i = 0;
 136    ubo_layout_mask.flags.q.std140 = 1;
 137    ubo_layout_mask.flags.q.packed = 1;
 138    ubo_layout_mask.flags.q.shared = 1;
 139    ubo_layout_mask.flags.q.std430 = 1;
 140
 141    ast_type_qualifier ubo_binding_mask;
 142    ubo_binding_mask.flags.i = 0;
 143    ubo_binding_mask.flags.q.explicit_binding = 1;
 144    ubo_binding_mask.flags.q.explicit_offset = 1;
 145
 146    ast_type_qualifier stream_layout_mask;
 147    stream_layout_mask.flags.i = 0;
 148    stream_layout_mask.flags.q.stream = 1;
 149
 150    /* Uniform block layout qualifiers get to overwrite each
 151     * other (rightmost having priority), while all other
 152     * qualifiers currently don't allow duplicates.
 153     */
 154    ast_type_qualifier allowed_duplicates_mask;
 155    allowed_duplicates_mask.flags.i =
 156       ubo_mat_mask.flags.i |
 157       ubo_layout_mask.flags.i |
 158       ubo_binding_mask.flags.i;
 159
 160    /* Geometry shaders can have several layout qualifiers
 161     * assigning different stream values.
 162     */
 163    if (state->stage == MESA_SHADER_GEOMETRY)
 164       allowed_duplicates_mask.flags.i |=
 165          stream_layout_mask.flags.i;
 166
 167    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 168        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 169       _mesa_glsl_error(loc, state,
 170                        "duplicate layout qualifiers used");
 171       return false;
 172    }
 173
 174    if (q.flags.q.prim_type) {
 175       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 176          _mesa_glsl_error(loc, state,
 177                           "conflicting primitive type qualifiers used");
 178          return false;
 179       }
 180       this->prim_type = q.prim_type;
 181    }
 182
 183    if (q.flags.q.max_vertices) {
 184       if (this->max_vertices) {
 185          this->max_vertices->merge_qualifier(q.max_vertices);
 186       } else {
 187          this->max_vertices = q.max_vertices;
 188       }
 189    }
 190
 191    if (q.flags.q.subroutine_def) {
 192       if (this->flags.q.subroutine_def) {
 193          _mesa_glsl_error(loc, state,
 194                           "conflicting subroutine qualifiers used");
 195       } else {
 196          this->subroutine_list = q.subroutine_list;
 197       }
 198    }
 199
 200    if (q.flags.q.invocations) {
 201       if (this->invocations) {
 202          this->invocations->merge_qualifier(q.invocations);
 203       } else {
 204          this->invocations = q.invocations;
 205       }
 206    }
 207
 208    if (state->stage == MESA_SHADER_GEOMETRY &&
 209        state->has_explicit_attrib_stream()) {
 210       if (!this->flags.q.explicit_stream) {
 211          if (q.flags.q.stream) {
 212             this->flags.q.stream = 1;
 213             this->stream = q.stream;
 214          } else if (!this->flags.q.stream && this->flags.q.out) {
 215             /* Assign default global stream value */
 216             this->flags.q.stream = 1;
 217             this->stream = state->out_qualifier->stream;
 218          }
 219       }
 220    }
 221
 222    if (q.flags.q.vertices) {
 223       if (this->vertices) {
 224          this->vertices->merge_qualifier(q.vertices);
 225       } else {
 226          this->vertices = q.vertices;
 227       }
 228    }
 229
 230    if (q.flags.q.vertex_spacing) {
 231       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 232          _mesa_glsl_error(loc, state,
 233                           "conflicting vertex spacing used");
 234          return false;
 235       }
 236       this->vertex_spacing = q.vertex_spacing;
 237    }
 238
 239    if (q.flags.q.ordering) {
 240       if (this->flags.q.ordering && this->ordering != q.ordering) {
 241          _mesa_glsl_error(loc, state,
 242                           "conflicting ordering used");
 243          return false;
 244       }
 245       this->ordering = q.ordering;
 246    }
 247
 248    if (q.flags.q.point_mode) {
 249       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 250          _mesa_glsl_error(loc, state,
 251                           "conflicting point mode used");
 252          return false;
 253       }
 254       this->point_mode = q.point_mode;
 255    }
 256
 257    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 258       this->flags.i &= ~ubo_mat_mask.flags.i;
 259    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 260       this->flags.i &= ~ubo_layout_mask.flags.i;
 261
 262    for (int i = 0; i < 3; i++) {
 263       if (q.flags.q.local_size & (1 << i)) {
 264          if (this->local_size[i]) {
 265             this->local_size[i]->merge_qualifier(q.local_size[i]);
 266          } else {
 267             this->local_size[i] = q.local_size[i];
 268          }
 269       }
 270    }
 271
 272    this->flags.i |= q.flags.i;
 273
 274    if (q.flags.q.explicit_location)
 275       this->location = q.location;
 276
 277    if (q.flags.q.explicit_index)
 278       this->index = q.index;
 279
 280    if (q.flags.q.explicit_binding)
 281       this->binding = q.binding;
 282
 283    if (q.flags.q.explicit_offset)
 284       this->offset = q.offset;
 285
 286    if (q.precision != ast_precision_none)
 287       this->precision = q.precision;
 288
 289    if (q.flags.q.explicit_image_format) {
 290       this->image_format = q.image_format;
 291       this->image_base_type = q.image_base_type;
 292    }
 293
 294    return true;
 295 }
 296
 297 bool
 298 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 299                                         _mesa_glsl_parse_state *state,
 300                                         const ast_type_qualifier &q,
 301                                         ast_node* &node, bool create_node)
 302 {
 303    void *mem_ctx = state;
 304    const bool r = this->merge_qualifier(loc, state, q, false);
 305
 306    if (state->stage == MESA_SHADER_GEOMETRY) {
 307       if (q.flags.q.prim_type) {
 308          /* Make sure this is a valid output primitive type. */
 309          switch (q.prim_type) {
 310          case GL_POINTS:
 311          case GL_LINE_STRIP:
 312          case GL_TRIANGLE_STRIP:
 313             break;
 314          default:
 315             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 316                              "primitive type");
 317             break;
 318          }
 319       }
 320
 321       /* Allow future assigments of global out's stream id value */
 322       this->flags.q.explicit_stream = 0;
 323    } else if (state->stage == MESA_SHADER_TESS_CTRL) {
 324       if (create_node) {
 325          node = new(mem_ctx) ast_tcs_output_layout(*loc);
 326       }
 327    } else {
 328       _mesa_glsl_error(loc, state, "out layout qualifiers only valid in "
 329                        "tessellation control or geometry shaders");
 330    }
 331
 332    return r;
 333 }
 334
 335 bool
 336 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 337                                        _mesa_glsl_parse_state *state,
 338                                        const ast_type_qualifier &q,
 339                                        ast_node* &node, bool create_node)
 340 {
 341    void *mem_ctx = state;
 342    bool create_gs_ast = false;
 343    bool create_cs_ast = false;
 344    ast_type_qualifier valid_in_mask;
 345    valid_in_mask.flags.i = 0;
 346
 347    switch (state->stage) {
 348    case MESA_SHADER_TESS_EVAL:
 349       if (q.flags.q.prim_type) {
 350          /* Make sure this is a valid input primitive type. */
 351          switch (q.prim_type) {
 352          case GL_TRIANGLES:
 353          case GL_QUADS:
 354          case GL_ISOLINES:
 355             break;
 356          default:
 357             _mesa_glsl_error(loc, state,
 358                              "invalid tessellation evaluation "
 359                              "shader input primitive type");
 360             break;
 361          }
 362       }
 363
 364       valid_in_mask.flags.q.prim_type = 1;
 365       valid_in_mask.flags.q.vertex_spacing = 1;
 366       valid_in_mask.flags.q.ordering = 1;
 367       valid_in_mask.flags.q.point_mode = 1;
 368       break;
 369    case MESA_SHADER_GEOMETRY:
 370       if (q.flags.q.prim_type) {
 371          /* Make sure this is a valid input primitive type. */
 372          switch (q.prim_type) {
 373          case GL_POINTS:
 374          case GL_LINES:
 375          case GL_LINES_ADJACENCY:
 376          case GL_TRIANGLES:
 377          case GL_TRIANGLES_ADJACENCY:
 378             break;
 379          default:
 380             _mesa_glsl_error(loc, state,
 381                              "invalid geometry shader input primitive type");
 382             break;
 383          }
 384       }
 385
 386       create_gs_ast |=
 387          q.flags.q.prim_type &&
 388          !state->in_qualifier->flags.q.prim_type;
 389
 390       valid_in_mask.flags.q.prim_type = 1;
 391       valid_in_mask.flags.q.invocations = 1;
 392       break;
 393    case MESA_SHADER_FRAGMENT:
 394       valid_in_mask.flags.q.early_fragment_tests = 1;
 395       break;
 396    case MESA_SHADER_COMPUTE:
 397       create_cs_ast |=
 398          q.flags.q.local_size != 0 &&
 399          state->in_qualifier->flags.q.local_size == 0;
 400
 401       valid_in_mask.flags.q.local_size = 7;
 402       break;
 403    default:
 404       _mesa_glsl_error(loc, state,
 405                        "input layout qualifiers only valid in "
 406                        "geometry, fragment and compute shaders");
 407       break;
 408    }
 409
 410    /* Generate an error when invalid input layout qualifiers are used. */
 411    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 412       _mesa_glsl_error(loc, state,
 413                        "invalid input layout qualifiers used");
 414       return false;
 415    }
 416
 417    /* Input layout qualifiers can be specified multiple
 418     * times in separate declarations, as long as they match.
 419     */
 420    if (this->flags.q.prim_type) {
 421       if (q.flags.q.prim_type &&
 422           this->prim_type != q.prim_type) {
 423          _mesa_glsl_error(loc, state,
 424                           "conflicting input primitive %s specified",
 425                           state->stage == MESA_SHADER_GEOMETRY ?
 426                           "type" : "mode");
 427       }
 428    } else if (q.flags.q.prim_type) {
 429       state->in_qualifier->flags.q.prim_type = 1;
 430       state->in_qualifier->prim_type = q.prim_type;
 431    }
 432
 433    if (q.flags.q.invocations) {
 434       this->flags.q.invocations = 1;
 435       if (this->invocations) {
 436          this->invocations->merge_qualifier(q.invocations);
 437       } else {
 438          this->invocations = q.invocations;
 439       }
 440    }
 441
 442    if (q.flags.q.early_fragment_tests) {
 443       state->fs_early_fragment_tests = true;
 444    }
 445
 446    if (this->flags.q.vertex_spacing) {
 447       if (q.flags.q.vertex_spacing &&
 448           this->vertex_spacing != q.vertex_spacing) {
 449          _mesa_glsl_error(loc, state,
 450                           "conflicting vertex spacing specified");
 451       }
 452    } else if (q.flags.q.vertex_spacing) {
 453       this->flags.q.vertex_spacing = 1;
 454       this->vertex_spacing = q.vertex_spacing;
 455    }
 456
 457    if (this->flags.q.ordering) {
 458       if (q.flags.q.ordering &&
 459           this->ordering != q.ordering) {
 460          _mesa_glsl_error(loc, state,
 461                           "conflicting ordering specified");
 462       }
 463    } else if (q.flags.q.ordering) {
 464       this->flags.q.ordering = 1;
 465       this->ordering = q.ordering;
 466    }
 467
 468    if (this->flags.q.point_mode) {
 469       if (q.flags.q.point_mode &&
 470           this->point_mode != q.point_mode) {
 471          _mesa_glsl_error(loc, state,
 472                           "conflicting point mode specified");
 473       }
 474    } else if (q.flags.q.point_mode) {
 475       this->flags.q.point_mode = 1;
 476       this->point_mode = q.point_mode;
 477    }
 478
 479    if (create_node) {
 480       if (create_gs_ast) {
 481          node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 482       } else if (create_cs_ast) {
 483          node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 484       }
 485    }
 486
 487    return true;
 488 }
 489
 490 bool
 491 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 492                                                   const char *qual_indentifier,
 493                                                   unsigned *value,
 494                                                   bool can_be_zero)
 495 {
 496    int min_value = 0;
 497    bool first_pass = true;
 498    *value = 0;
 499
 500    if (!can_be_zero)
 501       min_value = 1;
 502
 503    for (exec_node *node = layout_const_expressions.head;
 504            !node->is_tail_sentinel(); node = node->next) {
 505
 506       exec_list dummy_instructions;
 507       ast_node *const_expression = exec_node_data(ast_node, node, link);
 508
 509       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 510
 511       ir_constant *const const_int = ir->constant_expression_value();
 512       if (const_int == NULL || !const_int->type->is_integer()) {
 513          YYLTYPE loc = const_expression->get_location();
 514          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 515                           "expression", qual_indentifier);
 516          return false;
 517       }
 518
 519       if (const_int->value.i[0] < min_value) {
 520          YYLTYPE loc = const_expression->get_location();
 521          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 522                           "(%d < %d)", qual_indentifier,
 523                           const_int->value.i[0], min_value);
 524          return false;
 525       }
 526
 527       if (!first_pass && *value != const_int->value.u[0]) {
 528          YYLTYPE loc = const_expression->get_location();
 529          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 530                           "match previous declaration (%d vs %d)",
 531                           qual_indentifier, *value, const_int->value.i[0]);
 532          return false;
 533       } else {
 534          first_pass = false;
 535          *value = const_int->value.u[0];
 536       }
 537
 538       /* If the location is const (and we've verified that
 539        * it is) then no instructions should have been emitted
 540        * when we converted it to HIR. If they were emitted,
 541        * then either the location isn't const after all, or
 542        * we are emitting unnecessary instructions.
 543        */
 544       assert(dummy_instructions.is_empty());
 545    }
 546
 547    return true;
 548 }