src/OpenGL/compiler/OutputASM.cpp

   1 // SwiftShader Software Renderer\r
   2 //\r
   3 // Copyright(c) 2005-2013 TransGaming Inc.\r
   4 //\r
   5 // All rights reserved. No part of this software may be copied, distributed, transmitted,\r
   6 // transcribed, stored in a retrieval system, translated into any human or computer\r
   7 // language by any means, or disclosed to third parties without the explicit written\r
   8 // agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express\r
   9 // or implied, including but not limited to any patent rights, are granted to you.\r
  10 //\r
  11 \r
  12 #include "OutputASM.h"\r
  13 \r
  14 #include "common/debug.h"\r
  15 #include "InfoSink.h"\r
  16 \r
  17 #include "libGLESv2/Shader.h"\r
  18 \r
  19 #include <GLES2/gl2.h>\r
  20 #include <GLES2/gl2ext.h>\r
  21 #include <GLES3/gl3.h>\r
  22 \r
  23 namespace glsl\r
  24 {\r
  25         // Integer to TString conversion\r
  26         TString str(int i)\r
  27         {\r
  28                 char buffer[20];\r
  29                 sprintf(buffer, "%d", i);\r
  30                 return buffer;\r
  31         }\r
  32 \r
  33         class Temporary : public TIntermSymbol\r
  34         {\r
  35         public:\r
  36                 Temporary(OutputASM *assembler) : TIntermSymbol(0, "tmp", TType(EbtFloat, EbpHigh, EvqTemporary, 4, 1, false)), assembler(assembler)\r
  37                 {\r
  38                 }\r
  39 \r
  40                 ~Temporary()\r
  41                 {\r
  42                         assembler->freeTemporary(this);\r
  43                 }\r
  44 \r
  45         private:\r
  46                 OutputASM *const assembler;\r
  47         };\r
  48 \r
  49         class Constant : public TIntermConstantUnion\r
  50         {\r
  51         public:\r
  52                 Constant(float x, float y, float z, float w) : TIntermConstantUnion(constants, TType(EbtFloat, EbpHigh, EvqConstExpr, 4, 1, false))\r
  53                 {\r
  54                         constants[0].setFConst(x);\r
  55                         constants[1].setFConst(y);\r
  56                         constants[2].setFConst(z);\r
  57                         constants[3].setFConst(w);\r
  58                 }\r
  59 \r
  60                 Constant(bool b) : TIntermConstantUnion(constants, TType(EbtBool, EbpHigh, EvqConstExpr, 1, 1, false))\r
  61                 {\r
  62                         constants[0].setBConst(b);\r
  63                 }\r
  64 \r
  65                 Constant(int i) : TIntermConstantUnion(constants, TType(EbtInt, EbpHigh, EvqConstExpr, 1, 1, false))\r
  66                 {\r
  67                         constants[0].setIConst(i);\r
  68                 }\r
  69 \r
  70                 ~Constant()\r
  71                 {\r
  72                 }\r
  73 \r
  74         private:\r
  75                 ConstantUnion constants[4];\r
  76         };\r
  77 \r
  78         Uniform::Uniform(GLenum type, GLenum precision, const std::string &name, int arraySize, int registerIndex)\r
  79         {\r
  80                 this->type = type;\r
  81                 this->precision = precision;\r
  82                 this->name = name;\r
  83                 this->arraySize = arraySize;\r
  84                 this->registerIndex = registerIndex;\r
  85         }\r
  86 \r
  87         Attribute::Attribute()\r
  88         {\r
  89                 type = GL_NONE;\r
  90                 arraySize = 0;\r
  91                 registerIndex = 0;\r
  92         }\r
  93 \r
  94         Attribute::Attribute(GLenum type, const std::string &name, int arraySize, int registerIndex)\r
  95         {\r
  96                 this->type = type;\r
  97                 this->name = name;\r
  98                 this->arraySize = arraySize;\r
  99                 this->registerIndex = registerIndex;\r
 100         }\r
 101 \r
 102         sw::PixelShader *Shader::getPixelShader() const\r
 103         {\r
 104                 return 0;\r
 105         }\r
 106 \r
 107         sw::VertexShader *Shader::getVertexShader() const\r
 108         {\r
 109                 return 0;\r
 110         }\r
 111 \r
 112         OutputASM::OutputASM(TParseContext &context, Shader *shaderObject) : TIntermTraverser(true, true, true), mContext(context), shaderObject(shaderObject)\r
 113         {\r
 114                 shader = 0;\r
 115                 pixelShader = 0;\r
 116                 vertexShader = 0;\r
 117 \r
 118                 if(shaderObject)\r
 119                 {\r
 120                         shader = shaderObject->getShader();\r
 121                         pixelShader = shaderObject->getPixelShader();\r
 122                         vertexShader = shaderObject->getVertexShader();\r
 123                 }\r
 124 \r
 125                 functionArray.push_back(Function(0, "main(", 0, 0));\r
 126                 currentFunction = 0;\r
 127                 outputQualifier = EvqOutput; // Set outputQualifier to any value other than EvqFragColor or EvqFragData\r
 128         }\r
 129 \r
 130         OutputASM::~OutputASM()\r
 131         {\r
 132         }\r
 133 \r
 134         void OutputASM::output()\r
 135         {\r
 136                 if(shader)\r
 137                 {\r
 138                         emitShader(GLOBAL);\r
 139 \r
 140                         if(functionArray.size() > 1)   // Only call main() when there are other functions\r
 141                         {\r
 142                                 Instruction *callMain = emit(sw::Shader::OPCODE_CALL);\r
 143                                 callMain->dst.type = sw::Shader::PARAMETER_LABEL;\r
 144                                 callMain->dst.index = 0;   // main()\r
 145 \r
 146                                 emit(sw::Shader::OPCODE_RET);\r
 147                         }\r
 148 \r
 149                         emitShader(FUNCTION);\r
 150                 }\r
 151         }\r
 152 \r
 153         void OutputASM::emitShader(Scope scope)\r
 154         {\r
 155                 emitScope = scope;\r
 156                 currentScope = GLOBAL;\r
 157                 mContext.treeRoot->traverse(this);\r
 158         }\r
 159 \r
 160         void OutputASM::freeTemporary(Temporary *temporary)\r
 161         {\r
 162                 free(temporaries, temporary);\r
 163         }\r
 164 \r
 165         void OutputASM::visitSymbol(TIntermSymbol *symbol)\r
 166         {\r
 167                 // Vertex varyings don't have to be actively used to successfully link\r
 168                 // against pixel shaders that use them. So make sure they're declared.\r
 169                 if(symbol->getQualifier() == EvqVaryingOut || symbol->getQualifier() == EvqInvariantVaryingOut)\r
 170                 {\r
 171                         if(symbol->getBasicType() != EbtInvariant)   // Typeless declarations are not new varyings\r
 172                         {\r
 173                                 declareVarying(symbol, -1);\r
 174                         }\r
 175                 }\r
 176         }\r
 177 \r
 178         bool OutputASM::visitBinary(Visit visit, TIntermBinary *node)\r
 179         {\r
 180                 if(currentScope != emitScope)\r
 181                 {\r
 182                         return false;\r
 183                 }\r
 184 \r
 185                 TIntermTyped *result = node;\r
 186                 TIntermTyped *left = node->getLeft();\r
 187                 TIntermTyped *right = node->getRight();\r
 188                 const TType &leftType = left->getType();\r
 189                 const TType &rightType = right->getType();\r
 190                 const TType &resultType = node->getType();\r
 191                 \r
 192                 switch(node->getOp())\r
 193                 {\r
 194                 case EOpAssign:\r
 195                         if(visit == PostVisit)\r
 196                         {\r
 197                                 assignLvalue(left, right);\r
 198                                 copy(result, right);\r
 199                         }\r
 200                         break;\r
 201                 case EOpInitialize:\r
 202                         if(visit == PostVisit)\r
 203                         {\r
 204                                 copy(left, right);\r
 205                         }\r
 206                         break;\r
 207                 case EOpMatrixTimesScalarAssign:\r
 208                         if(visit == PostVisit)\r
 209                         {\r
 210                                 for(int i = 0; i < leftType.getNominalSize(); i++)\r
 211                                 {\r
 212                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 213                                         mul->dst.index += i;\r
 214                                         argument(mul->src[0], left, i);\r
 215                                 }\r
 216 \r
 217                                 assignLvalue(left, result);\r
 218                         }\r
 219                         break;\r
 220                 case EOpVectorTimesMatrixAssign:\r
 221                         if(visit == PostVisit)\r
 222                         {\r
 223                                 int size = leftType.getNominalSize();\r
 224 \r
 225                                 for(int i = 0; i < size; i++)\r
 226                                 {\r
 227                                         Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, left, right);\r
 228                                         dot->dst.mask = 1 << i;\r
 229                                         argument(dot->src[1], right, i);\r
 230                                 }\r
 231 \r
 232                                 assignLvalue(left, result);\r
 233                         }\r
 234                         break;\r
 235                 case EOpMatrixTimesMatrixAssign:\r
 236                         if(visit == PostVisit)\r
 237                         {\r
 238                                 int dim = leftType.getNominalSize();\r
 239 \r
 240                                 for(int i = 0; i < dim; i++)\r
 241                                 {\r
 242                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 243                                         mul->dst.index += i;\r
 244                                         argument(mul->src[1], right, i);\r
 245                                         mul->src[1].swizzle = 0x00;\r
 246 \r
 247                                         for(int j = 1; j < dim; j++)\r
 248                                         {\r
 249                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 250                                                 mad->dst.index += i;\r
 251                                                 argument(mad->src[0], left, j);\r
 252                                                 argument(mad->src[1], right, i);\r
 253                                                 mad->src[1].swizzle = j * 0x55;\r
 254                                                 argument(mad->src[2], result, i);\r
 255                                         }\r
 256                                 }\r
 257 \r
 258                                 assignLvalue(left, result);\r
 259                         }\r
 260                         break;\r
 261                 case EOpIndexDirect:\r
 262                         if(visit == PostVisit)\r
 263                         {\r
 264                                 int index = right->getAsConstantUnion()->getIConst(0);\r
 265 \r
 266                                 if(result->isMatrix() || result->isStruct())\r
 267                                 {\r
 268                                         ASSERT(left->isArray());\r
 269                                         copy(result, left, index * left->elementRegisterCount());\r
 270                                 }\r
 271                                 else if(result->isRegister())\r
 272                                 {\r
 273                                         Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 274 \r
 275                                         if(left->isRegister())\r
 276                                         {\r
 277                                                 mov->src[0].swizzle = index;\r
 278                                         }\r
 279                                         else if(left->isArray())\r
 280                                         {\r
 281                                                 argument(mov->src[0], left, index * left->elementRegisterCount());\r
 282                                         }\r
 283                                         else if(left->isMatrix())\r
 284                                         {\r
 285                                                 ASSERT(index < left->getNominalSize());   // FIXME: Report semantic error\r
 286                                                 argument(mov->src[0], left, index);\r
 287                                         }\r
 288                                         else UNREACHABLE();\r
 289                                 }\r
 290                                 else UNREACHABLE();\r
 291                         }\r
 292                         break;\r
 293                 case EOpIndexIndirect:\r
 294                         if(visit == PostVisit)\r
 295                         {\r
 296                                 if(left->isArray() || left->isMatrix())\r
 297                                 {\r
 298                                         for(int index = 0; index < result->totalRegisterCount(); index++)\r
 299                                         {\r
 300                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 301                                                 mov->dst.index += index;\r
 302                                                 mov->dst.mask = writeMask(result, index);\r
 303                                                 argument(mov->src[0], left, index);\r
 304 \r
 305                                                 if(left->totalRegisterCount() > 1)\r
 306                                                 {\r
 307                                                         sw::Shader::SourceParameter relativeRegister;\r
 308                                                         argument(relativeRegister, right);\r
 309 \r
 310                                                         mov->src[0].rel.type = relativeRegister.type;\r
 311                                                         mov->src[0].rel.index = relativeRegister.index;\r
 312                                                         mov->src[0].rel.scale = result->totalRegisterCount();\r
 313                                                         mov->src[0].rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);\r
 314                                                 }\r
 315                                         }\r
 316                                 }\r
 317                                 else if(left->isRegister())\r
 318                                 {\r
 319                                         emit(sw::Shader::OPCODE_EXTRACT, result, left, right);\r
 320                                 }\r
 321                                 else UNREACHABLE();\r
 322                         }\r
 323                         break;\r
 324                 case EOpIndexDirectStruct:\r
 325                         if(visit == PostVisit)\r
 326                         {\r
 327                                 ASSERT(leftType.isStruct());\r
 328 \r
 329                                 const TTypeList *structure = leftType.getStruct();\r
 330                                 const TString &fieldName = rightType.getFieldName();\r
 331                                 int fieldOffset = 0;\r
 332 \r
 333                                 for(size_t i = 0; i < structure->size(); i++)\r
 334                                 {\r
 335                                         const TType &fieldType = *(*structure)[i].type;\r
 336 \r
 337                                         if(fieldType.getFieldName() == fieldName)\r
 338                                         {\r
 339                                                 break;\r
 340                                         }\r
 341 \r
 342                                         fieldOffset += fieldType.totalRegisterCount();\r
 343                                 }\r
 344 \r
 345                                 copy(result, left, fieldOffset);\r
 346                         }\r
 347                         break;\r
 348                 case EOpVectorSwizzle:\r
 349                         if(visit == PostVisit)\r
 350                         {\r
 351                                 int swizzle = 0;\r
 352                                 TIntermAggregate *components = right->getAsAggregate();\r
 353 \r
 354                                 if(components)\r
 355                                 {\r
 356                                         TIntermSequence &sequence = components->getSequence();\r
 357                                         int component = 0;\r
 358 \r
 359                                         for(TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); sit++)\r
 360                                         {\r
 361                                                 TIntermConstantUnion *element = (*sit)->getAsConstantUnion();\r
 362 \r
 363                                                 if(element)\r
 364                                                 {\r
 365                                                         int i = element->getUnionArrayPointer()[0].getIConst();\r
 366                                                         swizzle |= i << (component * 2);\r
 367                                                         component++;\r
 368                                                 }\r
 369                                                 else UNREACHABLE();\r
 370                                         }\r
 371                                 }\r
 372                                 else UNREACHABLE();\r
 373 \r
 374                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 375                                 mov->src[0].swizzle = swizzle;\r
 376                         }\r
 377                         break;\r
 378                 case EOpAddAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_ADD, result, left, left, right); break;\r
 379                 case EOpAdd:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_ADD, result, left, right);       break;\r
 380                 case EOpSubAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_SUB, result, left, left, right); break;\r
 381                 case EOpSub:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_SUB, result, left, right);       break;\r
 382                 case EOpMulAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 383                 case EOpMul:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_MUL, result, left, right);       break;\r
 384                 case EOpDivAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_DIV, result, left, left, right); break;\r
 385                 case EOpDiv:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_DIV, result, left, right);       break;\r
 386                 case EOpEqual:\r
 387                         if(visit == PostVisit)\r
 388                         {\r
 389                                 emitCmp(sw::Shader::CONTROL_EQ, result, left, right);\r
 390 \r
 391                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 392                                 {\r
 393                                         Temporary equal(this);\r
 394                                         emitCmp(sw::Shader::CONTROL_EQ, &equal, left, right, index);\r
 395                                         emit(sw::Shader::OPCODE_AND, result, result, &equal);\r
 396                                 }\r
 397                         }\r
 398                         break;\r
 399                 case EOpNotEqual:\r
 400                         if(visit == PostVisit)\r
 401                         {\r
 402                                 emitCmp(sw::Shader::CONTROL_NE, result, left, right);\r
 403 \r
 404                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 405                                 {\r
 406                                         Temporary notEqual(this);\r
 407                                         emitCmp(sw::Shader::CONTROL_NE, &notEqual, left, right, index);\r
 408                                         emit(sw::Shader::OPCODE_OR, result, result, &notEqual);\r
 409                                 }\r
 410                         }\r
 411                         break;\r
 412                 case EOpLessThan:                if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, left, right); break;\r
 413                 case EOpGreaterThan:             if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, left, right); break;\r
 414                 case EOpLessThanEqual:           if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, left, right); break;\r
 415                 case EOpGreaterThanEqual:        if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, left, right); break;\r
 416                 case EOpVectorTimesScalarAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 417                 case EOpVectorTimesScalar:       if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, left, right); break;\r
 418                 case EOpMatrixTimesScalar:\r
 419                         if(visit == PostVisit)\r
 420                         {\r
 421                                 for(int i = 0; i < leftType.getNominalSize(); i++)\r
 422                                 {\r
 423                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 424                                         mul->dst.index += i;\r
 425                                         argument(mul->src[0], left, i);\r
 426                                 }\r
 427                         }\r
 428                         break;\r
 429                 case EOpVectorTimesMatrix:\r
 430                         if(visit == PostVisit)\r
 431                         {\r
 432                                 int size = leftType.getNominalSize();\r
 433 \r
 434                                 for(int i = 0; i < size; i++)\r
 435                                 {\r
 436                                         Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, left, right);\r
 437                                         dot->dst.mask = 1 << i;\r
 438                                         argument(dot->src[1], right, i);\r
 439                                 }\r
 440                         }\r
 441                         break;\r
 442                 case EOpMatrixTimesVector:\r
 443                         if(visit == PostVisit)\r
 444                         {\r
 445                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 446                                 mul->src[1].swizzle = 0x00;\r
 447 \r
 448                                 for(int i = 1; i < leftType.getNominalSize(); i++)\r
 449                                 {\r
 450                                         Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 451                                         argument(mad->src[0], left, i);\r
 452                                         mad->src[1].swizzle = i * 0x55;\r
 453                                 }\r
 454                         }\r
 455                         break;\r
 456                 case EOpMatrixTimesMatrix:\r
 457                         if(visit == PostVisit)\r
 458                         {\r
 459                                 int dim = leftType.getNominalSize();\r
 460 \r
 461                                 for(int i = 0; i < dim; i++)\r
 462                                 {\r
 463                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 464                                         mul->dst.index += i;\r
 465                                         argument(mul->src[1], right, i);\r
 466                                         mul->src[1].swizzle = 0x00;\r
 467 \r
 468                                         for(int j = 1; j < dim; j++)\r
 469                                         {\r
 470                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 471                                                 mad->dst.index += i;\r
 472                                                 argument(mad->src[0], left, j);\r
 473                                                 argument(mad->src[1], right, i);\r
 474                                                 mad->src[1].swizzle = j * 0x55;\r
 475                                                 argument(mad->src[2], result, i);\r
 476                                         }\r
 477                                 }\r
 478                         }\r
 479                         break;\r
 480                 case EOpLogicalOr:\r
 481                         if(trivial(right, 6))\r
 482                         {\r
 483                                 if(visit == PostVisit)\r
 484                                 {\r
 485                                         emit(sw::Shader::OPCODE_OR, result, left, right);\r
 486                                 }\r
 487                         }\r
 488                         else   // Short-circuit evaluation\r
 489                         {\r
 490                                 if(visit == InVisit)\r
 491                                 {\r
 492                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 493                                         Instruction *ifnot = emit(sw::Shader::OPCODE_IF, 0, result);\r
 494                                         ifnot->src[0].modifier = sw::Shader::MODIFIER_NOT;\r
 495                                 }\r
 496                                 else if(visit == PostVisit)\r
 497                                 {\r
 498                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 499                                         emit(sw::Shader::OPCODE_ENDIF);\r
 500                                 }\r
 501                         }\r
 502                         break;\r
 503                 case EOpLogicalXor:        if(visit == PostVisit) emit(sw::Shader::OPCODE_XOR, result, left, right); break;\r
 504                 case EOpLogicalAnd:\r
 505                         if(trivial(right, 6))\r
 506                         {\r
 507                                 if(visit == PostVisit)\r
 508                                 {\r
 509                                         emit(sw::Shader::OPCODE_AND, result, left, right);\r
 510                                 }\r
 511                         }\r
 512                         else   // Short-circuit evaluation\r
 513                         {\r
 514                                 if(visit == InVisit)\r
 515                                 {\r
 516                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 517                                         emit(sw::Shader::OPCODE_IF, 0, result);\r
 518                                 }\r
 519                                 else if(visit == PostVisit)\r
 520                                 {\r
 521                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 522                                         emit(sw::Shader::OPCODE_ENDIF);\r
 523                                 }\r
 524                         }\r
 525                         break;\r
 526                 default: UNREACHABLE();\r
 527                 }\r
 528 \r
 529                 return true;\r
 530         }\r
 531 \r
 532         bool OutputASM::visitUnary(Visit visit, TIntermUnary *node)\r
 533         {\r
 534                 if(currentScope != emitScope)\r
 535                 {\r
 536                         return false;\r
 537                 }\r
 538 \r
 539                 Constant one(1.0f, 1.0f, 1.0f, 1.0f);\r
 540                 Constant rad(1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f);\r
 541                 Constant deg(5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f);\r
 542 \r
 543                 TIntermTyped *result = node;\r
 544                 TIntermTyped *arg = node->getOperand();\r
 545 \r
 546                 switch(node->getOp())\r
 547                 {\r
 548                 case EOpNegative:\r
 549                         if(visit == PostVisit)\r
 550                         {\r
 551                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 552                                 {\r
 553                                         Instruction *neg = emit(sw::Shader::OPCODE_MOV, result, arg);\r
 554                                         neg->dst.index += index;\r
 555                                         argument(neg->src[0], arg, index);\r
 556                                         neg->src[0].modifier = sw::Shader::MODIFIER_NEGATE;\r
 557                                 }\r
 558                         }\r
 559                         break;\r
 560                 case EOpVectorLogicalNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 561                 case EOpLogicalNot:       if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 562                 case EOpPostIncrement:\r
 563                         if(visit == PostVisit)\r
 564                         {\r
 565                                 copy(result, arg);\r
 566 \r
 567                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 568                                 {\r
 569                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, arg, arg, &one);\r
 570                                         add->dst.index += index;\r
 571                                         argument(add->src[0], arg, index);\r
 572                                 }\r
 573 \r
 574                                 assignLvalue(arg, arg);\r
 575                         }\r
 576                         break;\r
 577                 case EOpPostDecrement:\r
 578                         if(visit == PostVisit)\r
 579                         {\r
 580                                 copy(result, arg);\r
 581 \r
 582                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 583                                 {\r
 584                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, arg, arg, &one);\r
 585                                         sub->dst.index += index;\r
 586                                         argument(sub->src[0], arg, index);\r
 587                                 }\r
 588 \r
 589                                 assignLvalue(arg, arg);\r
 590                         }\r
 591                         break;\r
 592                 case EOpPreIncrement:\r
 593                         if(visit == PostVisit)\r
 594                         {\r
 595                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 596                                 {\r
 597                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, result, arg, &one);\r
 598                                         add->dst.index += index;\r
 599                                         argument(add->src[0], arg, index);\r
 600                                 }\r
 601 \r
 602                                 assignLvalue(arg, result);\r
 603                         }\r
 604                         break;\r
 605                 case EOpPreDecrement:\r
 606                         if(visit == PostVisit)\r
 607                         {\r
 608                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 609                                 {\r
 610                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, result, arg, &one);\r
 611                                         sub->dst.index += index;\r
 612                                         argument(sub->src[0], arg, index);\r
 613                                 }\r
 614 \r
 615                                 assignLvalue(arg, result);\r
 616                         }\r
 617                         break;\r
 618                 case EOpRadians:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &rad); break;\r
 619                 case EOpDegrees:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &deg); break;\r
 620                 case EOpSin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_SIN, result, arg); break;\r
 621                 case EOpCos:              if(visit == PostVisit) emit(sw::Shader::OPCODE_COS, result, arg); break;\r
 622                 case EOpTan:              if(visit == PostVisit) emit(sw::Shader::OPCODE_TAN, result, arg); break;\r
 623                 case EOpAsin:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ASIN, result, arg); break;\r
 624                 case EOpAcos:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOS, result, arg); break;\r
 625                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN, result, arg); break;\r
 626                 case EOpSinh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SINH, result, arg); break;\r
 627                 case EOpCosh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_COSH, result, arg); break;\r
 628                 case EOpTanh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_TANH, result, arg); break;\r
 629                 case EOpAsinh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ASINH, result, arg); break;\r
 630                 case EOpAcosh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOSH, result, arg); break;\r
 631                 case EOpAtanh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ATANH, result, arg); break;\r
 632                 case EOpExp:              if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP, result, arg); break;\r
 633                 case EOpLog:              if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG, result, arg); break;\r
 634                 case EOpExp2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP2, result, arg); break;\r
 635                 case EOpLog2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG2, result, arg); break;\r
 636                 case EOpSqrt:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SQRT, result, arg); break;\r
 637                 case EOpInverseSqrt:      if(visit == PostVisit) emit(sw::Shader::OPCODE_RSQ, result, arg); break;\r
 638                 case EOpAbs:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ABS, result, arg); break;\r
 639                 case EOpSign:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SGN, result, arg); break;\r
 640                 case EOpFloor:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOOR, result, arg); break;\r
 641                 case EOpTrunc:            if(visit == PostVisit) emit(sw::Shader::OPCODE_TRUNC, result, arg); break;\r
 642                 case EOpRound:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUND, result, arg); break;\r
 643                 case EOpRoundEven:        if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUNDEVEN, result, arg); break;\r
 644                 case EOpCeil:             if(visit == PostVisit) emit(sw::Shader::OPCODE_CEIL, result, arg, result); break;\r
 645                 case EOpFract:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FRC, result, arg); break;\r
 646                 case EOpIsNan:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ISNAN, result, arg); break;\r
 647                 case EOpIsInf:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ISINF, result, arg); break;\r
 648                 case EOpLength:           if(visit == PostVisit) emit(sw::Shader::OPCODE_LEN(dim(arg)), result, arg); break;\r
 649                 case EOpNormalize:        if(visit == PostVisit) emit(sw::Shader::OPCODE_NRM(dim(arg)), result, arg); break;\r
 650                 case EOpDFdx:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDX, result, arg); break;\r
 651                 case EOpDFdy:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDY, result, arg); break;\r
 652                 case EOpFwidth:           if(visit == PostVisit) emit(sw::Shader::OPCODE_FWIDTH, result, arg); break;\r
 653                 case EOpAny:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ANY, result, arg); break;\r
 654                 case EOpAll:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ALL, result, arg); break;\r
 655                 case EOpTranspose:\r
 656                         if(visit == PostVisit)\r
 657                         {\r
 658                                 int numCols = arg->getNominalSize();\r
 659                                 int numRows = arg->getSecondarySize();\r
 660                                 for(int i = 0; i < numCols; ++i)\r
 661                                 {\r
 662                                         for(int j = 0; j < numRows; ++j)\r
 663                                         {\r
 664                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, arg);\r
 665                                                 mov->src[0].index += i;\r
 666                                                 mov->src[0].swizzle = 0x55 * j;\r
 667                                                 mov->dst.index += j;\r
 668                                                 mov->dst.mask = 1 << i;\r
 669                                         }\r
 670                                 }\r
 671                         }\r
 672                         break;\r
 673                 default: UNREACHABLE();\r
 674                 }\r
 675 \r
 676                 return true;\r
 677         }\r
 678 \r
 679         bool OutputASM::visitAggregate(Visit visit, TIntermAggregate *node)\r
 680         {\r
 681                 if(currentScope != emitScope && node->getOp() != EOpFunction && node->getOp() != EOpSequence)\r
 682                 {\r
 683                         return false;\r
 684                 }\r
 685 \r
 686                 Constant zero(0.0f, 0.0f, 0.0f, 0.0f);\r
 687 \r
 688                 TIntermTyped *result = node;\r
 689                 const TType &resultType = node->getType();\r
 690                 TIntermSequence &arg = node->getSequence();\r
 691                 int argumentCount = arg.size();\r
 692 \r
 693                 switch(node->getOp())\r
 694                 {\r
 695                 case EOpSequence:           break;\r
 696                 case EOpDeclaration:        break;\r
 697                 case EOpPrototype:          break;\r
 698                 case EOpComma:\r
 699                         if(visit == PostVisit)\r
 700                         {\r
 701                                 copy(result, arg[1]);\r
 702                         }\r
 703                         break;\r
 704                 case EOpFunction:\r
 705                         if(visit == PreVisit)\r
 706                         {\r
 707                                 const TString &name = node->getName();\r
 708 \r
 709                                 if(emitScope == FUNCTION)\r
 710                                 {\r
 711                                         if(functionArray.size() > 1)   // No need for a label when there's only main()\r
 712                                         {\r
 713                                                 Instruction *label = emit(sw::Shader::OPCODE_LABEL);\r
 714                                                 label->dst.type = sw::Shader::PARAMETER_LABEL;\r
 715 \r
 716                                                 const Function *function = findFunction(name);\r
 717                                                 ASSERT(function);   // Should have been added during global pass\r
 718                                                 label->dst.index = function->label;\r
 719                                                 currentFunction = function->label;\r
 720                                         }\r
 721                                 }\r
 722                                 else if(emitScope == GLOBAL)\r
 723                                 {\r
 724                                         if(name != "main(")\r
 725                                         {\r
 726                                                 TIntermSequence &arguments = node->getSequence()[0]->getAsAggregate()->getSequence();\r
 727                                                 functionArray.push_back(Function(functionArray.size(), name, &arguments, node));\r
 728                                         }\r
 729                                 }\r
 730                                 else UNREACHABLE();\r
 731 \r
 732                                 currentScope = FUNCTION;\r
 733                         }\r
 734                         else if(visit == PostVisit)\r
 735                         {\r
 736                                 if(emitScope == FUNCTION)\r
 737                                 {\r
 738                                         if(functionArray.size() > 1)   // No need to return when there's only main()\r
 739                                         {\r
 740                                                 emit(sw::Shader::OPCODE_RET);\r
 741                                         }\r
 742                                 }\r
 743 \r
 744                                 currentScope = GLOBAL;\r
 745                         }\r
 746                         break;\r
 747                 case EOpFunctionCall:\r
 748                         if(visit == PostVisit)\r
 749                         {\r
 750                                 if(node->isUserDefined())\r
 751                                 {\r
 752                                         const TString &name = node->getName();\r
 753                                         const Function *function = findFunction(name);\r
 754 \r
 755                                         if(!function)\r
 756                                         {\r
 757                                                 mContext.error(node->getLine(), "function definition not found", name.c_str());\r
 758                                                 return false;\r
 759                                         }\r
 760 \r
 761                                         TIntermSequence &arguments = *function->arg;\r
 762 \r
 763                                         for(int i = 0; i < argumentCount; i++)\r
 764                                         {\r
 765                                                 TIntermTyped *in = arguments[i]->getAsTyped();\r
 766 \r
 767                                                 if(in->getQualifier() == EvqIn ||\r
 768                                                    in->getQualifier() == EvqInOut ||\r
 769                                                    in->getQualifier() == EvqConstReadOnly)\r
 770                                                 {\r
 771                                                         copy(in, arg[i]);\r
 772                                                 }\r
 773                                         }\r
 774 \r
 775                                         Instruction *call = emit(sw::Shader::OPCODE_CALL);\r
 776                                         call->dst.type = sw::Shader::PARAMETER_LABEL;\r
 777                                         call->dst.index = function->label;\r
 778 \r
 779                                         if(function->ret && function->ret->getType().getBasicType() != EbtVoid)\r
 780                                         {\r
 781                                                 copy(result, function->ret);\r
 782                                         }\r
 783 \r
 784                                         for(int i = 0; i < argumentCount; i++)\r
 785                                         {\r
 786                                                 TIntermTyped *argument = arguments[i]->getAsTyped();\r
 787                                                 TIntermTyped *out = arg[i]->getAsTyped();\r
 788                                                                 \r
 789                                                 if(argument->getQualifier() == EvqOut ||\r
 790                                                    argument->getQualifier() == EvqInOut)\r
 791                                                 {\r
 792                                                         copy(out, argument);\r
 793                                                 }\r
 794                                         }\r
 795                                 }\r
 796                                 else\r
 797                                 {\r
 798                                         TString name = TFunction::unmangleName(node->getName());\r
 799 \r
 800                                         if(name == "texture" || name == "texture2D" || name == "textureCube" || name == "texture3D")\r
 801                                         {\r
 802                                                 if(argumentCount == 2)\r
 803                                                 {\r
 804                                                         emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 805                                                 }\r
 806                                                 else if(argumentCount == 3)   // bias\r
 807                                                 {\r
 808                                                         Temporary uvwb(this);\r
 809                                                         emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 810                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 811                                                         bias->dst.mask = 0x8;\r
 812 \r
 813                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &uvwb, arg[0]);   // FIXME: Implement an efficient TEXLDB instruction\r
 814                                                         tex->bias = true;\r
 815                                                 }\r
 816                                                 else UNREACHABLE();\r
 817                                         }\r
 818                                         else if(name == "texture2DProj")\r
 819                                         {\r
 820                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 821 \r
 822                                                 if(argumentCount == 2)\r
 823                                                 {\r
 824                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 825                                                         tex->project = true;\r
 826 \r
 827                                                         if(t->getNominalSize() == 3)\r
 828                                                         {\r
 829                                                                 tex->src[0].swizzle = 0xA4;\r
 830                                                         }\r
 831                                                         else ASSERT(t->getNominalSize() == 4);\r
 832                                                 }\r
 833                                                 else if(argumentCount == 3)   // bias\r
 834                                                 {\r
 835                                                         Temporary proj(this);\r
 836 \r
 837                                                         if(t->getNominalSize() == 3)\r
 838                                                         {\r
 839                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 840                                                                 div->src[1].swizzle = 0xAA;\r
 841                                                                 div->dst.mask = 0x3;\r
 842                                                         }\r
 843                                                         else if(t->getNominalSize() == 4)\r
 844                                                         {\r
 845                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 846                                                                 div->src[1].swizzle = 0xFF;\r
 847                                                                 div->dst.mask = 0x3;\r
 848                                                         }\r
 849                                                         else UNREACHABLE();\r
 850 \r
 851                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 852                                                         bias->dst.mask = 0x8;\r
 853 \r
 854                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &proj, arg[0]);\r
 855                                                         tex->bias = true;\r
 856                                                 }\r
 857                                                 else UNREACHABLE();\r
 858                                         }\r
 859                                         else if(name == "texture2DLod" || name == "textureCubeLod")\r
 860                                         {\r
 861                                                 Temporary uvwb(this);\r
 862                                                 emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 863                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 864                                                 lod->dst.mask = 0x8;\r
 865 \r
 866                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &uvwb, arg[0]);\r
 867                                         }\r
 868                                         else if(name == "texture2DProjLod")\r
 869                                         {\r
 870                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 871                                                 Temporary proj(this);\r
 872 \r
 873                                                 if(t->getNominalSize() == 3)\r
 874                                                 {\r
 875                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 876                                                         div->src[1].swizzle = 0xAA;\r
 877                                                         div->dst.mask = 0x3;\r
 878                                                 }\r
 879                                                 else if(t->getNominalSize() == 4)\r
 880                                                 {\r
 881                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 882                                                         div->src[1].swizzle = 0xFF;\r
 883                                                         div->dst.mask = 0x3;\r
 884                                                 }\r
 885                                                 else UNREACHABLE();\r
 886 \r
 887                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 888                                                 lod->dst.mask = 0x8;\r
 889 \r
 890                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &proj, arg[0]);\r
 891                                         }\r
 892                                         else UNREACHABLE();\r
 893                                 }\r
 894                         }\r
 895                         break;\r
 896                 case EOpParameters:\r
 897                         break;\r
 898                 case EOpConstructFloat:\r
 899                 case EOpConstructVec2:\r
 900                 case EOpConstructVec3:\r
 901                 case EOpConstructVec4:\r
 902                 case EOpConstructBool:\r
 903                 case EOpConstructBVec2:\r
 904                 case EOpConstructBVec3:\r
 905                 case EOpConstructBVec4:\r
 906                 case EOpConstructInt:\r
 907                 case EOpConstructIVec2:\r
 908                 case EOpConstructIVec3:\r
 909                 case EOpConstructIVec4:\r
 910                 case EOpConstructUInt:\r
 911                 case EOpConstructUVec2:\r
 912                 case EOpConstructUVec3:\r
 913                 case EOpConstructUVec4:\r
 914                         if(visit == PostVisit)\r
 915                         {\r
 916                                 int component = 0;\r
 917 \r
 918                                 for(int i = 0; i < argumentCount; i++)\r
 919                                 {\r
 920                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
 921                                         int size = argi->getNominalSize();\r
 922 \r
 923                                         if(!argi->isMatrix())\r
 924                                         {\r
 925                                                 Instruction *mov = emitCast(result, argi);\r
 926                                                 mov->dst.mask = (0xF << component) & 0xF;\r
 927                                                 mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 928 \r
 929                                                 component += size;\r
 930                                         }\r
 931                                         else   // Matrix\r
 932                                         {\r
 933                                                 int column = 0;\r
 934 \r
 935                                                 while(component < resultType.getNominalSize())\r
 936                                                 {\r
 937                                                         Instruction *mov = emitCast(result, argi);\r
 938                                                         mov->dst.mask = (0xF << component) & 0xF;\r
 939                                                         mov->src[0].index += column;\r
 940                                                         mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 941 \r
 942                                                         column++;\r
 943                                                         component += size;\r
 944                                                 }\r
 945                                         }\r
 946                                 }\r
 947                         }\r
 948                         break;\r
 949                 case EOpConstructMat2:\r
 950                 case EOpConstructMat2x3:\r
 951                 case EOpConstructMat2x4:\r
 952                 case EOpConstructMat3x2:\r
 953                 case EOpConstructMat3:\r
 954                 case EOpConstructMat3x4:\r
 955                 case EOpConstructMat4x2:\r
 956                 case EOpConstructMat4x3:\r
 957                 case EOpConstructMat4:\r
 958                         if(visit == PostVisit)\r
 959                         {\r
 960                                 TIntermTyped *arg0 = arg[0]->getAsTyped();\r
 961                                 const int dim = result->getNominalSize();\r
 962 \r
 963                                 if(arg0->isScalar() && arg.size() == 1)   // Construct scale matrix\r
 964                                 {\r
 965                                         for(int i = 0; i < dim; i++)\r
 966                                         {\r
 967                                                 Instruction *init = emit(sw::Shader::OPCODE_MOV, result, &zero);\r
 968                                                 init->dst.index += i;\r
 969                                                 Instruction *mov = emitCast(result, arg0);\r
 970                                                 mov->dst.index += i;\r
 971                                                 mov->dst.mask = 1 << i;\r
 972                                                 ASSERT(mov->src[0].swizzle == 0x00);\r
 973                                         }\r
 974                                 }\r
 975                                 else if(arg0->isMatrix())\r
 976                                 {\r
 977                                         for(int i = 0; i < dim; i++)\r
 978                                         {\r
 979                                                 if(dim > dim2(arg0))\r
 980                                                 {\r
 981                                                         // Initialize to identity matrix\r
 982                                                         Constant col((i == 0 ? 1.0f : 0.0f), (i == 1 ? 1.0f : 0.0f), (i == 2 ? 1.0f : 0.0f), (i == 3 ? 1.0f : 0.0f));\r
 983                                                         Instruction *mov = emitCast(result, &col);\r
 984                                                         mov->dst.index += i;\r
 985                                                 }\r
 986 \r
 987                                                 if(i < dim2(arg0))\r
 988                                                 {\r
 989                                                         Instruction *mov = emitCast(result, arg0);\r
 990                                                         mov->dst.index += i;\r
 991                                                         mov->dst.mask = 0xF >> (4 - dim2(arg0));\r
 992                                                         argument(mov->src[0], arg0, i);\r
 993                                                 }\r
 994                                         }\r
 995                                 }\r
 996                                 else\r
 997                                 {\r
 998                                         int column = 0;\r
 999                                         int row = 0;\r
1000 \r
1001                                         for(int i = 0; i < argumentCount; i++)\r
1002                                         {\r
1003                                                 TIntermTyped *argi = arg[i]->getAsTyped();\r
1004                                                 int size = argi->getNominalSize();\r
1005                                                 int element = 0;\r
1006 \r
1007                                                 while(element < size)\r
1008                                                 {\r
1009                                                         Instruction *mov = emitCast(result, argi);\r
1010                                                         mov->dst.index += column;\r
1011                                                         mov->dst.mask = (0xF << row) & 0xF;\r
1012                                                         mov->src[0].swizzle = (readSwizzle(argi, size) << (row * 2)) + 0x55 * element;\r
1013 \r
1014                                                         int end = row + size - element;\r
1015                                                         column = end >= dim ? column + 1 : column;\r
1016                                                         element = element + dim - row;\r
1017                                                         row = end >= dim ? 0 : end;\r
1018                                                 }\r
1019                                         }\r
1020                                 }\r
1021                         }\r
1022                         break;\r
1023                 case EOpConstructStruct:\r
1024                         if(visit == PostVisit)\r
1025                         {\r
1026                                 int offset = 0;\r
1027                                 for(int i = 0; i < argumentCount; i++)\r
1028                                 {\r
1029                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
1030                                         int size = argi->totalRegisterCount();\r
1031 \r
1032                                         for(int index = 0; index < size; index++)\r
1033                                         {\r
1034                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, argi);\r
1035                                                 mov->dst.index += index + offset;\r
1036                                                 mov->dst.mask = writeMask(result, offset + index);\r
1037                                                 argument(mov->src[0], argi, index);\r
1038                                         }\r
1039 \r
1040                                         offset += size;\r
1041                                 }\r
1042                         }\r
1043                         break;\r
1044                 case EOpLessThan:         if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, arg[0], arg[1]); break;\r
1045                 case EOpGreaterThan:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, arg[0], arg[1]); break;\r
1046                 case EOpLessThanEqual:    if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, arg[0], arg[1]); break;\r
1047                 case EOpGreaterThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, arg[0], arg[1]); break;\r
1048                 case EOpVectorEqual:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_EQ, result, arg[0], arg[1]); break;\r
1049                 case EOpVectorNotEqual:   if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_NE, result, arg[0], arg[1]); break;\r
1050                 case EOpMod:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MOD, result, arg[0], arg[1]); break;\r
1051                 case EOpPow:              if(visit == PostVisit) emit(sw::Shader::OPCODE_POW, result, arg[0], arg[1]); break;\r
1052                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN2, result, arg[0], arg[1]); break;\r
1053                 case EOpMin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MIN, result, arg[0], arg[1]); break;\r
1054                 case EOpMax:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]); break;\r
1055                 case EOpClamp:\r
1056                         if(visit == PostVisit)\r
1057                         {\r
1058                                 emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]);\r
1059                                 emit(sw::Shader::OPCODE_MIN, result, result, arg[2]);\r
1060                         }\r
1061                         break;\r
1062                 case EOpMix:         if(visit == PostVisit) emit(sw::Shader::OPCODE_LRP, result, arg[2], arg[1], arg[0]); break;\r
1063                 case EOpStep:        if(visit == PostVisit) emit(sw::Shader::OPCODE_STEP, result, arg[0], arg[1]); break;\r
1064                 case EOpSmoothStep:  if(visit == PostVisit) emit(sw::Shader::OPCODE_SMOOTH, result, arg[0], arg[1], arg[2]); break;\r
1065                 case EOpFloatBitsToInt:  if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOINT, result, arg[0]); break;\r
1066                 case EOpFloatBitsToUint: if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOUINT, result, arg[0]); break;\r
1067                 case EOpIntBitsToFloat:  if(visit == PostVisit) emit(sw::Shader::OPCODE_INTBITSTOFLOAT, result, arg[0]); break;\r
1068                 case EOpUintBitsToFloat: if(visit == PostVisit) emit(sw::Shader::OPCODE_UINTBITSTOFLOAT, result, arg[0]); break;\r
1069                 case EOpPackSnorm2x16:   if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKSNORM2x16, result, arg[0]); break;\r
1070                 case EOpPackUnorm2x16:   if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKUNORM2x16, result, arg[0]); break;\r
1071                 case EOpPackHalf2x16:    if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKHALF2x16, result, arg[0]); break;\r
1072                 case EOpUnpackSnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKSNORM2x16, result, arg[0]); break;\r
1073                 case EOpUnpackUnorm2x16: if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKUNORM2x16, result, arg[0]); break;\r
1074                 case EOpUnpackHalf2x16:  if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKHALF2x16, result, arg[0]); break;\r
1075                 case EOpDistance:    if(visit == PostVisit) emit(sw::Shader::OPCODE_DIST(dim(arg[0])), result, arg[0], arg[1]); break;\r
1076                 case EOpDot:         if(visit == PostVisit) emit(sw::Shader::OPCODE_DP(dim(arg[0])), result, arg[0], arg[1]); break;\r
1077                 case EOpCross:       if(visit == PostVisit) emit(sw::Shader::OPCODE_CRS, result, arg[0], arg[1]); break;\r
1078                 case EOpFaceForward: if(visit == PostVisit) emit(sw::Shader::OPCODE_FORWARD(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1079                 case EOpReflect:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFLECT(dim(arg[0])), result, arg[0], arg[1]); break;\r
1080                 case EOpRefract:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFRACT(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1081                 case EOpMul:\r
1082                         if(visit == PostVisit)\r
1083                         {\r
1084                                 ASSERT(dim2(arg[0]) == dim2(arg[1]));\r
1085 \r
1086                                 for(int i = 0; i < dim2(arg[0]); i++)\r
1087                                 {\r
1088                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, arg[0], arg[1]);\r
1089                                         mul->dst.index += i;\r
1090                                         argument(mul->src[0], arg[0], i);\r
1091                                         argument(mul->src[1], arg[1], i);\r
1092                                 }\r
1093                         }\r
1094                         break;\r
1095                 case EOpOuterProduct:\r
1096                         if(visit == PostVisit)\r
1097                         {\r
1098                                 for(int i = 0; i < dim(arg[1]); i++)\r
1099                                 {\r
1100                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, arg[0], arg[1]);\r
1101                                         mul->dst.index += i;\r
1102                                         mul->src[1].swizzle = 0x55 * i;\r
1103                                 }\r
1104                         }\r
1105                         break;\r
1106                 default: UNREACHABLE();\r
1107                 }\r
1108 \r
1109                 return true;\r
1110         }\r
1111 \r
1112         bool OutputASM::visitSelection(Visit visit, TIntermSelection *node)\r
1113         {\r
1114                 if(currentScope != emitScope)\r
1115                 {\r
1116                         return false;\r
1117                 }\r
1118 \r
1119                 TIntermTyped *condition = node->getCondition();\r
1120                 TIntermNode *trueBlock = node->getTrueBlock();\r
1121                 TIntermNode *falseBlock = node->getFalseBlock();\r
1122                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
1123 \r
1124                 condition->traverse(this);\r
1125 \r
1126                 if(node->usesTernaryOperator())\r
1127                 {\r
1128                         if(constantCondition)\r
1129                         {\r
1130                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1131 \r
1132                                 if(trueCondition)\r
1133                                 {\r
1134                                         trueBlock->traverse(this);\r
1135                                         copy(node, trueBlock);\r
1136                                 }\r
1137                                 else\r
1138                                 {\r
1139                                         falseBlock->traverse(this);\r
1140                                         copy(node, falseBlock);\r
1141                                 }\r
1142                         }\r
1143                         else if(trivial(node, 6))   // Fast to compute both potential results and no side effects\r
1144                         {\r
1145                                 trueBlock->traverse(this);\r
1146                                 falseBlock->traverse(this);\r
1147                                 emit(sw::Shader::OPCODE_SELECT, node, condition, trueBlock, falseBlock);\r
1148                         }\r
1149                         else\r
1150                         {\r
1151                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1152 \r
1153                                 if(trueBlock)\r
1154                                 {\r
1155                                         trueBlock->traverse(this);\r
1156                                         copy(node, trueBlock);\r
1157                                 }\r
1158 \r
1159                                 if(falseBlock)\r
1160                                 {\r
1161                                         emit(sw::Shader::OPCODE_ELSE);\r
1162                                         falseBlock->traverse(this);\r
1163                                         copy(node, falseBlock);\r
1164                                 }\r
1165 \r
1166                                 emit(sw::Shader::OPCODE_ENDIF);\r
1167                         }\r
1168                 }\r
1169                 else  // if/else statement\r
1170                 {\r
1171                         if(constantCondition)\r
1172                         {\r
1173                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1174 \r
1175                                 if(trueCondition)\r
1176                                 {\r
1177                                         if(trueBlock)\r
1178                                         {\r
1179                                                 trueBlock->traverse(this);\r
1180                                         }\r
1181                                 }\r
1182                                 else\r
1183                                 {\r
1184                                         if(falseBlock)\r
1185                                         {\r
1186                                                 falseBlock->traverse(this);\r
1187                                         }\r
1188                                 }\r
1189                         }\r
1190                         else\r
1191                         {\r
1192                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1193 \r
1194                                 if(trueBlock)\r
1195                                 {\r
1196                                         trueBlock->traverse(this);\r
1197                                 }\r
1198 \r
1199                                 if(falseBlock)\r
1200                                 {\r
1201                                         emit(sw::Shader::OPCODE_ELSE);\r
1202                                         falseBlock->traverse(this);\r
1203                                 }\r
1204 \r
1205                                 emit(sw::Shader::OPCODE_ENDIF);\r
1206                         }\r
1207                 }\r
1208 \r
1209                 return false;\r
1210         }\r
1211 \r
1212         bool OutputASM::visitLoop(Visit visit, TIntermLoop *node)\r
1213         {\r
1214                 if(currentScope != emitScope)\r
1215                 {\r
1216                         return false;\r
1217                 }\r
1218 \r
1219                 unsigned int iterations = loopCount(node);\r
1220 \r
1221                 if(iterations == 0)\r
1222                 {\r
1223                         return false;\r
1224                 }\r
1225 \r
1226                 bool unroll = (iterations <= 4);\r
1227 \r
1228                 if(unroll)\r
1229                 {\r
1230                         DetectLoopDiscontinuity detectLoopDiscontinuity;\r
1231                         unroll = !detectLoopDiscontinuity.traverse(node);\r
1232                 }\r
1233 \r
1234                 TIntermNode *init = node->getInit();\r
1235                 TIntermTyped *condition = node->getCondition();\r
1236                 TIntermTyped *expression = node->getExpression();\r
1237                 TIntermNode *body = node->getBody();\r
1238 \r
1239                 if(node->getType() == ELoopDoWhile)\r
1240                 {\r
1241                         Temporary iterate(this);\r
1242                         Constant True(true);\r
1243                         emit(sw::Shader::OPCODE_MOV, &iterate, &True);\r
1244 \r
1245                         emit(sw::Shader::OPCODE_WHILE, 0, &iterate);   // FIXME: Implement real do-while\r
1246 \r
1247                         if(body)\r
1248                         {\r
1249                                 body->traverse(this);\r
1250                         }\r
1251 \r
1252                         emit(sw::Shader::OPCODE_TEST);\r
1253 \r
1254                         condition->traverse(this);\r
1255                         emit(sw::Shader::OPCODE_MOV, &iterate, condition);\r
1256 \r
1257                         emit(sw::Shader::OPCODE_ENDWHILE);\r
1258                 }\r
1259                 else\r
1260                 {\r
1261                         if(init)\r
1262                         {\r
1263                                 init->traverse(this);\r
1264                         }\r
1265 \r
1266                         if(unroll)\r
1267                         {\r
1268                                 for(unsigned int i = 0; i < iterations; i++)\r
1269                                 {\r
1270                                 //      condition->traverse(this);   // Condition could contain statements, but not in an unrollable loop\r
1271 \r
1272                                         if(body)\r
1273                                         {\r
1274                                                 body->traverse(this);\r
1275                                         }\r
1276 \r
1277                                         if(expression)\r
1278                                         {\r
1279                                                 expression->traverse(this);\r
1280                                         }\r
1281                                 }\r
1282                         }\r
1283                         else\r
1284                         {\r
1285                                 condition->traverse(this);\r
1286 \r
1287                                 emit(sw::Shader::OPCODE_WHILE, 0, condition);\r
1288 \r
1289                                 if(body)\r
1290                                 {\r
1291                                         body->traverse(this);\r
1292                                 }\r
1293 \r
1294                                 emit(sw::Shader::OPCODE_TEST);\r
1295 \r
1296                                 if(expression)\r
1297                                 {\r
1298                                         expression->traverse(this);\r
1299                                 }\r
1300 \r
1301                                 condition->traverse(this);\r
1302 \r
1303                                 emit(sw::Shader::OPCODE_ENDWHILE);\r
1304                         }\r
1305                 }\r
1306 \r
1307                 return false;\r
1308         }\r
1309 \r
1310         bool OutputASM::visitBranch(Visit visit, TIntermBranch *node)\r
1311         {\r
1312                 if(currentScope != emitScope)\r
1313                 {\r
1314                         return false;\r
1315                 }\r
1316 \r
1317                 switch(node->getFlowOp())\r
1318                 {\r
1319                 case EOpKill:      if(visit == PostVisit) emit(sw::Shader::OPCODE_DISCARD);  break;\r
1320                 case EOpBreak:     if(visit == PostVisit) emit(sw::Shader::OPCODE_BREAK);    break;\r
1321                 case EOpContinue:  if(visit == PostVisit) emit(sw::Shader::OPCODE_CONTINUE); break;\r
1322                 case EOpReturn:\r
1323                         if(visit == PostVisit)\r
1324                         {\r
1325                                 TIntermTyped *value = node->getExpression();\r
1326 \r
1327                                 if(value)\r
1328                                 {\r
1329                                         copy(functionArray[currentFunction].ret, value);\r
1330                                 }\r
1331 \r
1332                                 emit(sw::Shader::OPCODE_LEAVE);\r
1333                         }\r
1334                         break;\r
1335                 default: UNREACHABLE();\r
1336                 }\r
1337 \r
1338                 return true;\r
1339         }\r
1340 \r
1341         bool OutputASM::isSamplerRegister(TIntermTyped *operand)\r
1342         {\r
1343                 return operand && isSamplerRegister(operand->getType());\r
1344         }\r
1345 \r
1346         bool OutputASM::isSamplerRegister(const TType &type)\r
1347         {\r
1348                 // A sampler register's qualifiers can be:\r
1349                 // - EvqUniform: The sampler uniform is used as is in the code (default case).\r
1350                 // - EvqTemporary: The sampler is indexed. It's still a sampler register.\r
1351                 // - EvqIn (and other similar types): The sampler has been passed as a function argument. At this point,\r
1352                 //                                    the sampler has been copied and is no longer a sampler register.\r
1353                 return IsSampler(type.getBasicType()) && (type.getQualifier() == EvqUniform || type.getQualifier() == EvqTemporary);\r
1354         }\r
1355 \r
1356         Instruction *OutputASM::emit(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2, int index)\r
1357         {\r
1358                 if(isSamplerRegister(dst))\r
1359                 {\r
1360                         op = sw::Shader::OPCODE_NULL;   // Can't assign to a sampler, but this is hit when indexing sampler arrays\r
1361                 }\r
1362 \r
1363                 Instruction *instruction = new Instruction(op);\r
1364 \r
1365                 if(dst)\r
1366                 {\r
1367                         instruction->dst.type = registerType(dst);\r
1368                         instruction->dst.index = registerIndex(dst) + index;\r
1369                         instruction->dst.mask = writeMask(dst);\r
1370                         instruction->dst.integer = (dst->getBasicType() == EbtInt);\r
1371                 }\r
1372 \r
1373                 argument(instruction->src[0], src0, index);\r
1374                 argument(instruction->src[1], src1, index);\r
1375                 argument(instruction->src[2], src2, index);\r
1376 \r
1377                 shader->append(instruction);\r
1378 \r
1379                 return instruction;\r
1380         }\r
1381 \r
1382         Instruction *OutputASM::emitCast(TIntermTyped *dst, TIntermTyped *src)\r
1383         {\r
1384                 // Integers are implemented as float\r
1385                 if((dst->getBasicType() == EbtFloat || dst->getBasicType() == EbtInt) && src->getBasicType() == EbtBool)\r
1386                 {\r
1387                         return emit(sw::Shader::OPCODE_B2F, dst, src);\r
1388                 }\r
1389                 if(dst->getBasicType() == EbtBool && (src->getBasicType() == EbtFloat || src->getBasicType() == EbtInt))\r
1390                 {\r
1391                         return emit(sw::Shader::OPCODE_F2B, dst, src);\r
1392                 }\r
1393                 if(dst->getBasicType() == EbtInt && src->getBasicType() == EbtFloat)\r
1394                 {\r
1395                         return emit(sw::Shader::OPCODE_TRUNC, dst, src);\r
1396                 }\r
1397 \r
1398                 return emit(sw::Shader::OPCODE_MOV, dst, src);\r
1399         }\r
1400 \r
1401         void OutputASM::emitBinary(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2)\r
1402         {\r
1403                 for(int index = 0; index < dst->elementRegisterCount(); index++)\r
1404                 {\r
1405                         emit(op, dst, src0, src1, src2, index);\r
1406                 }\r
1407         }\r
1408 \r
1409         void OutputASM::emitAssign(sw::Shader::Opcode op, TIntermTyped *result, TIntermTyped *lhs, TIntermTyped *src0, TIntermTyped *src1)\r
1410         {\r
1411                 emitBinary(op, result, src0, src1);\r
1412                 assignLvalue(lhs, result);\r
1413         }\r
1414 \r
1415         void OutputASM::emitCmp(sw::Shader::Control cmpOp, TIntermTyped *dst, TIntermNode *left, TIntermNode *right, int index)\r
1416         {\r
1417                 bool boolean = (left->getAsTyped()->getBasicType() == EbtBool);\r
1418                 sw::Shader::Opcode opcode = boolean ? sw::Shader::OPCODE_ICMP : sw::Shader::OPCODE_CMP;\r
1419 \r
1420                 Instruction *cmp = emit(opcode, dst, left, right);\r
1421                 cmp->control = cmpOp;\r
1422                 argument(cmp->src[0], left, index);\r
1423                 argument(cmp->src[1], right, index);\r
1424         }\r
1425 \r
1426         int componentCount(const TType &type, int registers)\r
1427         {\r
1428                 if(registers == 0)\r
1429                 {\r
1430                         return 0;\r
1431                 }\r
1432 \r
1433                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1434                 {\r
1435                         int index = registers / type.elementRegisterCount();\r
1436                         registers -= index * type.elementRegisterCount();\r
1437                         return index * type.getElementSize() + componentCount(type, registers);\r
1438                 }\r
1439 \r
1440                 if(type.isStruct())\r
1441                 {\r
1442                         TTypeList *structure = type.getStruct();\r
1443                         int elements = 0;\r
1444 \r
1445                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1446                         {\r
1447                                 const TType &fieldType = *field->type;\r
1448 \r
1449                                 if(fieldType.totalRegisterCount() <= registers)\r
1450                                 {\r
1451                                         registers -= fieldType.totalRegisterCount();\r
1452                                         elements += fieldType.getObjectSize();\r
1453                                 }\r
1454                                 else   // Register within this field\r
1455                                 {\r
1456                                         return elements + componentCount(fieldType, registers);\r
1457                                 }\r
1458                         }\r
1459                 }\r
1460                 else if(type.isMatrix())\r
1461                 {\r
1462                         return registers * type.getSecondarySize();\r
1463                 }\r
1464                 \r
1465                 UNREACHABLE();\r
1466                 return 0;\r
1467         }\r
1468 \r
1469         int registerSize(const TType &type, int registers)\r
1470         {\r
1471                 if(registers == 0)\r
1472                 {\r
1473                         if(type.isStruct())\r
1474                         {\r
1475                                 return registerSize(*type.getStruct()->begin()->type, 0);\r
1476                         }\r
1477 \r
1478                         return type.isMatrix() ? type.getSecondarySize() : type.getNominalSize();\r
1479                 }\r
1480 \r
1481                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1482                 {\r
1483                         int index = registers / type.elementRegisterCount();\r
1484                         registers -= index * type.elementRegisterCount();\r
1485                         return registerSize(type, registers);\r
1486                 }\r
1487 \r
1488                 if(type.isStruct())\r
1489                 {\r
1490                         TTypeList *structure = type.getStruct();\r
1491                         int elements = 0;\r
1492 \r
1493                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1494                         {\r
1495                                 const TType &fieldType = *field->type;\r
1496                                 \r
1497                                 if(fieldType.totalRegisterCount() <= registers)\r
1498                                 {\r
1499                                         registers -= fieldType.totalRegisterCount();\r
1500                                         elements += fieldType.getObjectSize();\r
1501                                 }\r
1502                                 else   // Register within this field\r
1503                                 {\r
1504                                         return registerSize(fieldType, registers);\r
1505                                 }\r
1506                         }\r
1507                 }\r
1508                 else if(type.isMatrix())\r
1509                 {\r
1510                         return registerSize(type, 0);\r
1511                 }\r
1512                 \r
1513                 UNREACHABLE();\r
1514                 return 0;\r
1515         }\r
1516 \r
1517         void OutputASM::argument(sw::Shader::SourceParameter &parameter, TIntermNode *argument, int index)\r
1518         {\r
1519                 if(argument)\r
1520                 {\r
1521                         TIntermTyped *arg = argument->getAsTyped();\r
1522                         const TType &type = arg->getType();\r
1523                         const TTypeList *structure = type.getStruct();\r
1524                         index = (index >= arg->totalRegisterCount()) ? arg->totalRegisterCount() - 1 : index;\r
1525 \r
1526                         int size = registerSize(type, index);\r
1527 \r
1528                         parameter.type = registerType(arg);\r
1529 \r
1530                         if(arg->getQualifier() == EvqConstExpr)\r
1531                         {\r
1532                                 int component = componentCount(type, index);\r
1533                                 ConstantUnion *constants = arg->getAsConstantUnion()->getUnionArrayPointer();\r
1534 \r
1535                                 for(int i = 0; i < 4; i++)\r
1536                                 {\r
1537                                         if(size == 1)   // Replicate\r
1538                                         {\r
1539                                                 parameter.value[i] = constants[component + 0].getAsFloat();\r
1540                                         }\r
1541                                         else if(i < size)\r
1542                                         {\r
1543                                                 parameter.value[i] = constants[component + i].getAsFloat();\r
1544                                         }\r
1545                                         else\r
1546                                         {\r
1547                                                 parameter.value[i] = 0.0f;\r
1548                                         }\r
1549                                 }\r
1550                         }\r
1551                         else\r
1552                         {\r
1553                                 parameter.index = registerIndex(arg) + index;\r
1554 \r
1555                                 if(isSamplerRegister(arg))\r
1556                                 {\r
1557                                         TIntermBinary *binary = argument->getAsBinaryNode();\r
1558 \r
1559                                         if(binary)\r
1560                                         {\r
1561                                                 TIntermTyped *left = binary->getLeft();\r
1562                                                 TIntermTyped *right = binary->getRight();\r
1563 \r
1564                                                 if(binary->getOp() == EOpIndexDirect)\r
1565                                                 {\r
1566                                                         parameter.index += right->getAsConstantUnion()->getIConst(0);\r
1567                                                 }\r
1568                                                 else if(binary->getOp() == EOpIndexIndirect)\r
1569                                                 {\r
1570                                                         if(left->getArraySize() > 1)\r
1571                                                         {\r
1572                                                                 parameter.rel.type = registerType(binary->getRight());\r
1573                                                                 parameter.rel.index = registerIndex(binary->getRight());\r
1574                                                                 parameter.rel.scale = 1;\r
1575                                                                 parameter.rel.deterministic = true;\r
1576                                                         }\r
1577                                                 }\r
1578                                                 else if(binary->getOp() == EOpIndexDirectStruct)\r
1579                                                 {\r
1580                                                         parameter.index += right->getAsConstantUnion()->getIConst(0);\r
1581                                                 }\r
1582                                                 else UNREACHABLE();\r
1583                                         }\r
1584                                 }\r
1585                         }\r
1586 \r
1587                         if(!IsSampler(arg->getBasicType()))\r
1588                         {\r
1589                                 parameter.swizzle = readSwizzle(arg, size);\r
1590                         }\r
1591                 }\r
1592         }\r
1593 \r
1594         void OutputASM::copy(TIntermTyped *dst, TIntermNode *src, int offset)\r
1595         {\r
1596                 for(int index = 0; index < dst->totalRegisterCount(); index++)\r
1597                 {\r
1598                         Instruction *mov = emit(sw::Shader::OPCODE_MOV, dst, src);\r
1599                         mov->dst.index += index;\r
1600                         mov->dst.mask = writeMask(dst, index);\r
1601                         argument(mov->src[0], src, offset + index);\r
1602                 }\r
1603         }\r
1604 \r
1605         int swizzleElement(int swizzle, int index)\r
1606         {\r
1607                 return (swizzle >> (index * 2)) & 0x03;\r
1608         }\r
1609 \r
1610         int swizzleSwizzle(int leftSwizzle, int rightSwizzle)\r
1611         {\r
1612                 return (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 0)) << 0) |\r
1613                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 1)) << 2) |\r
1614                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 2)) << 4) |\r
1615                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 3)) << 6);\r
1616         }\r
1617 \r
1618         void OutputASM::assignLvalue(TIntermTyped *dst, TIntermTyped *src)\r
1619         {\r
1620                 if(src &&\r
1621                         ((src->isVector() && (!dst->isVector() || (dst->getNominalSize() != dst->getNominalSize()))) ||\r
1622                          (src->isMatrix() && (!dst->isMatrix() || (src->getNominalSize() != dst->getNominalSize()) || (src->getSecondarySize() != dst->getSecondarySize())))))\r
1623                 {\r
1624                         return mContext.error(src->getLine(), "Result type should match the l-value type in compound assignment", src->isVector() ? "vector" : "matrix");\r
1625                 }\r
1626 \r
1627                 TIntermBinary *binary = dst->getAsBinaryNode();\r
1628 \r
1629                 if(binary && binary->getOp() == EOpIndexIndirect && dst->isScalar())\r
1630                 {\r
1631                         Instruction *insert = new Instruction(sw::Shader::OPCODE_INSERT);\r
1632                         \r
1633                         Temporary address(this);\r
1634                         lvalue(insert->dst, address, dst);\r
1635 \r
1636                         insert->src[0].type = insert->dst.type;\r
1637                         insert->src[0].index = insert->dst.index;\r
1638                         insert->src[0].rel = insert->dst.rel;\r
1639                         argument(insert->src[1], src);\r
1640                         argument(insert->src[2], binary->getRight());\r
1641 \r
1642                         shader->append(insert);\r
1643                 }\r
1644                 else\r
1645                 {\r
1646                         for(int offset = 0; offset < dst->totalRegisterCount(); offset++)\r
1647                         {\r
1648                                 Instruction *mov = new Instruction(sw::Shader::OPCODE_MOV);\r
1649                         \r
1650                                 Temporary address(this);\r
1651                                 int swizzle = lvalue(mov->dst, address, dst);\r
1652                                 mov->dst.index += offset;\r
1653 \r
1654                                 if(offset > 0)\r
1655                                 {\r
1656                                         mov->dst.mask = writeMask(dst, offset);\r
1657                                 }\r
1658 \r
1659                                 argument(mov->src[0], src, offset);\r
1660                                 mov->src[0].swizzle = swizzleSwizzle(mov->src[0].swizzle, swizzle);\r
1661 \r
1662                                 shader->append(mov);\r
1663                         }\r
1664                 }\r
1665         }\r
1666 \r
1667         int OutputASM::lvalue(sw::Shader::DestinationParameter &dst, Temporary &address, TIntermTyped *node)\r
1668         {\r
1669                 TIntermTyped *result = node;\r
1670                 TIntermBinary *binary = node->getAsBinaryNode();\r
1671                 TIntermSymbol *symbol = node->getAsSymbolNode();\r
1672 \r
1673                 if(binary)\r
1674                 {\r
1675                         TIntermTyped *left = binary->getLeft();\r
1676                         TIntermTyped *right = binary->getRight();\r
1677 \r
1678                         int leftSwizzle = lvalue(dst, address, left);   // Resolve the l-value of the left side\r
1679 \r
1680                         switch(binary->getOp())\r
1681                         {\r
1682                         case EOpIndexDirect:\r
1683                                 {\r
1684                                         int rightIndex = right->getAsConstantUnion()->getIConst(0);\r
1685 \r
1686                                         if(left->isRegister())\r
1687                                         {\r
1688                                                 int leftMask = dst.mask;\r
1689                                                 \r
1690                                                 dst.mask = 1;\r
1691                                                 while((leftMask & dst.mask) == 0)\r
1692                                                 {\r
1693                                                         dst.mask = dst.mask << 1;\r
1694                                                 }\r
1695 \r
1696                                                 int element = swizzleElement(leftSwizzle, rightIndex);\r
1697                                                 dst.mask = 1 << element;\r
1698                                                 \r
1699                                                 return element;\r
1700                                         }\r
1701                                         else if(left->isArray() || left->isMatrix())\r
1702                                         {\r
1703                                                 dst.index += rightIndex * result->totalRegisterCount();\r
1704                                                 return 0xE4;\r
1705                                         }\r
1706                                         else UNREACHABLE();\r
1707                                 }\r
1708                                 break;\r
1709                         case EOpIndexIndirect:\r
1710                                 {\r
1711                                         if(left->isRegister())\r
1712                                         {\r
1713                                                 // Requires INSERT instruction (handled by calling function)\r
1714                                         }\r
1715                                         else if(left->isArray() || left->isMatrix())\r
1716                                         {\r
1717                                                 int scale = result->totalRegisterCount();\r
1718 \r
1719                                                 if(dst.rel.type == sw::Shader::PARAMETER_VOID)   // Use the index register as the relative address directly\r
1720                                                 {\r
1721                                                         if(left->totalRegisterCount() > 1)\r
1722                                                         {\r
1723                                                                 sw::Shader::SourceParameter relativeRegister;\r
1724                                                                 argument(relativeRegister, right);\r
1725 \r
1726                                                                 dst.rel.index = relativeRegister.index;\r
1727                                                                 dst.rel.type = relativeRegister.type;\r
1728                                                                 dst.rel.scale = scale;\r
1729                                                                 dst.rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);\r
1730                                                         }\r
1731                                                 }\r
1732                                                 else if(dst.rel.index != registerIndex(&address))   // Move the previous index register to the address register\r
1733                                                 {\r
1734                                                         if(scale == 1)\r
1735                                                         {\r
1736                                                                 Constant oldScale((int)dst.rel.scale);\r
1737                                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, &address, &address, &oldScale, right);\r
1738                                                                 mad->src[0].index = dst.rel.index;\r
1739                                                                 mad->src[0].type = dst.rel.type;\r
1740                                                         }\r
1741                                                         else\r
1742                                                         {\r
1743                                                                 Constant oldScale((int)dst.rel.scale);\r
1744                                                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, &address, &address, &oldScale);\r
1745                                                                 mul->src[0].index = dst.rel.index;\r
1746                                                                 mul->src[0].type = dst.rel.type;\r
1747 \r
1748                                                                 Constant newScale(scale);\r
1749                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1750                                                         }\r
1751 \r
1752                                                         dst.rel.type = sw::Shader::PARAMETER_TEMP;\r
1753                                                         dst.rel.index = registerIndex(&address);\r
1754                                                         dst.rel.scale = 1;\r
1755                                                 }\r
1756                                                 else   // Just add the new index to the address register\r
1757                                                 {\r
1758                                                         if(scale == 1)\r
1759                                                         {\r
1760                                                                 emit(sw::Shader::OPCODE_ADD, &address, &address, right);\r
1761                                                         }\r
1762                                                         else\r
1763                                                         {\r
1764                                                                 Constant newScale(scale);\r
1765                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1766                                                         }\r
1767                                                 }\r
1768                                         }\r
1769                                         else UNREACHABLE();\r
1770                                 }\r
1771                                 break;\r
1772                         case EOpIndexDirectStruct:\r
1773                                 {\r
1774                                         const TTypeList *structure = left->getType().getStruct();\r
1775                                         const TString &fieldName = right->getType().getFieldName();\r
1776 \r
1777                                         int offset = 0;\r
1778                                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1779                                         {\r
1780                                                 if(field->type->getFieldName() == fieldName)\r
1781                                                 {\r
1782                                                         dst.type = registerType(left);\r
1783                                                         dst.index += offset;\r
1784                                                         dst.mask = writeMask(right);\r
1785                                                         \r
1786                                                         return 0xE4;\r
1787                                                 }\r
1788 \r
1789                                                 offset += field->type->totalRegisterCount();\r
1790                                         }\r
1791                                 }\r
1792                                 break;\r
1793                         case EOpVectorSwizzle:\r
1794                                 {\r
1795                                         ASSERT(left->isRegister());\r
1796 \r
1797                                         int leftMask = dst.mask;\r
1798 \r
1799                                         int swizzle = 0;\r
1800                                         int rightMask = 0;\r
1801 \r
1802                                         TIntermSequence &sequence = right->getAsAggregate()->getSequence();\r
1803 \r
1804                                         for(unsigned int i = 0; i < sequence.size(); i++)\r
1805                                         {\r
1806                                                 int index = sequence[i]->getAsConstantUnion()->getIConst(0);\r
1807 \r
1808                                                 int element = swizzleElement(leftSwizzle, index);\r
1809                                                 rightMask = rightMask | (1 << element);\r
1810                                                 swizzle = swizzle | swizzleElement(leftSwizzle, i) << (element * 2);\r
1811                                         }\r
1812                                         \r
1813                                         dst.mask = leftMask & rightMask;\r
1814 \r
1815                                         return swizzle;\r
1816                                 }\r
1817                                 break;\r
1818                         default:\r
1819                                 UNREACHABLE();   // Not an l-value operator\r
1820                                 break;\r
1821                         }\r
1822                 }\r
1823                 else if(symbol)\r
1824                 {\r
1825                         dst.type = registerType(symbol);\r
1826                         dst.index = registerIndex(symbol);\r
1827                         dst.mask = writeMask(symbol);\r
1828                         return 0xE4;\r
1829                 }\r
1830 \r
1831                 return 0xE4;\r
1832         }\r
1833 \r
1834         sw::Shader::ParameterType OutputASM::registerType(TIntermTyped *operand)\r
1835         {\r
1836                 if(isSamplerRegister(operand))\r
1837                 {\r
1838                         return sw::Shader::PARAMETER_SAMPLER;\r
1839                 }\r
1840 \r
1841                 const TQualifier qualifier = operand->getQualifier();\r
1842                 if((EvqFragColor == qualifier) || (EvqFragData == qualifier))\r
1843                 {\r
1844                         if(((EvqFragData == qualifier) && (EvqFragColor == outputQualifier)) ||\r
1845                            ((EvqFragColor == qualifier) && (EvqFragData == outputQualifier)))\r
1846                         {\r
1847                                 mContext.error(operand->getLine(), "static assignment to both gl_FragData and gl_FragColor", "");\r
1848                         }\r
1849                         outputQualifier = qualifier;\r
1850                 }\r
1851 \r
1852                 switch(qualifier)\r
1853                 {\r
1854                 case EvqTemporary:           return sw::Shader::PARAMETER_TEMP;\r
1855                 case EvqGlobal:              return sw::Shader::PARAMETER_TEMP;\r
1856                 case EvqConstExpr:           return sw::Shader::PARAMETER_FLOAT4LITERAL;   // All converted to float\r
1857                 case EvqAttribute:           return sw::Shader::PARAMETER_INPUT;\r
1858                 case EvqVaryingIn:           return sw::Shader::PARAMETER_INPUT;\r
1859                 case EvqVaryingOut:          return sw::Shader::PARAMETER_OUTPUT;\r
1860                 case EvqInvariantVaryingIn:  return sw::Shader::PARAMETER_INPUT;    // FIXME: Guarantee invariance at the backend\r
1861                 case EvqInvariantVaryingOut: return sw::Shader::PARAMETER_OUTPUT;   // FIXME: Guarantee invariance at the backend \r
1862                 case EvqUniform:             return sw::Shader::PARAMETER_CONST;\r
1863                 case EvqIn:                  return sw::Shader::PARAMETER_TEMP;\r
1864                 case EvqOut:                 return sw::Shader::PARAMETER_TEMP;\r
1865                 case EvqInOut:               return sw::Shader::PARAMETER_TEMP;\r
1866                 case EvqConstReadOnly:       return sw::Shader::PARAMETER_TEMP;\r
1867                 case EvqPosition:            return sw::Shader::PARAMETER_OUTPUT;\r
1868                 case EvqPointSize:           return sw::Shader::PARAMETER_OUTPUT;\r
1869                 case EvqInstanceID:          return sw::Shader::PARAMETER_MISCTYPE;\r
1870                 case EvqFragCoord:           return sw::Shader::PARAMETER_MISCTYPE;\r
1871                 case EvqFrontFacing:         return sw::Shader::PARAMETER_MISCTYPE;\r
1872                 case EvqPointCoord:          return sw::Shader::PARAMETER_INPUT;\r
1873                 case EvqFragColor:           return sw::Shader::PARAMETER_COLOROUT;\r
1874                 case EvqFragData:            return sw::Shader::PARAMETER_COLOROUT;\r
1875                 default: UNREACHABLE();\r
1876                 }\r
1877 \r
1878                 return sw::Shader::PARAMETER_VOID;\r
1879         }\r
1880 \r
1881         int OutputASM::registerIndex(TIntermTyped *operand)\r
1882         {\r
1883                 if(isSamplerRegister(operand))\r
1884                 {\r
1885                         return samplerRegister(operand);\r
1886                 }\r
1887 \r
1888                 switch(operand->getQualifier())\r
1889                 {\r
1890                 case EvqTemporary:           return temporaryRegister(operand);\r
1891                 case EvqGlobal:              return temporaryRegister(operand);\r
1892                 case EvqConstExpr:           UNREACHABLE();\r
1893                 case EvqAttribute:           return attributeRegister(operand);\r
1894                 case EvqVaryingIn:           return varyingRegister(operand);\r
1895                 case EvqVaryingOut:          return varyingRegister(operand);\r
1896                 case EvqInvariantVaryingIn:  return varyingRegister(operand);\r
1897                 case EvqInvariantVaryingOut: return varyingRegister(operand);\r
1898                 case EvqUniform:             return uniformRegister(operand);\r
1899                 case EvqIn:                  return temporaryRegister(operand);\r
1900                 case EvqOut:                 return temporaryRegister(operand);\r
1901                 case EvqInOut:               return temporaryRegister(operand);\r
1902                 case EvqConstReadOnly:       return temporaryRegister(operand);\r
1903                 case EvqPosition:            return varyingRegister(operand);\r
1904                 case EvqPointSize:           return varyingRegister(operand);\r
1905                 case EvqInstanceID:          vertexShader->instanceIdDeclared = true; return 0;\r
1906                 case EvqFragCoord:           pixelShader->vPosDeclared = true;  return 0;\r
1907                 case EvqFrontFacing:         pixelShader->vFaceDeclared = true; return 1;\r
1908                 case EvqPointCoord:          return varyingRegister(operand);\r
1909                 case EvqFragColor:           return 0;\r
1910                 case EvqFragData:            return 0;\r
1911                 default: UNREACHABLE();\r
1912                 }\r
1913 \r
1914                 return 0;\r
1915         }\r
1916 \r
1917         int OutputASM::writeMask(TIntermTyped *destination, int index)\r
1918         {\r
1919                 if(destination->getQualifier() == EvqPointSize)\r
1920                 {\r
1921                         return 0x2;   // Point size stored in the y component\r
1922                 }\r
1923 \r
1924                 return 0xF >> (4 - registerSize(destination->getType(), index));\r
1925         }\r
1926 \r
1927         int OutputASM::readSwizzle(TIntermTyped *argument, int size)\r
1928         {\r
1929                 if(argument->getQualifier() == EvqPointSize)\r
1930                 {\r
1931                         return 0x55;   // Point size stored in the y component\r
1932                 }\r
1933 \r
1934                 static const unsigned char swizzleSize[5] = {0x00, 0x00, 0x54, 0xA4, 0xE4};   // (void), xxxx, xyyy, xyzz, xyzw\r
1935 \r
1936                 return swizzleSize[size];\r
1937         }\r
1938 \r
1939         // Conservatively checks whether an expression is fast to compute and has no side effects\r
1940         bool OutputASM::trivial(TIntermTyped *expression, int budget)\r
1941         {\r
1942                 if(!expression->isRegister())\r
1943                 {\r
1944                         return false;\r
1945                 }\r
1946 \r
1947                 return cost(expression, budget) >= 0;\r
1948         }\r
1949 \r
1950         // Returns the remaining computing budget (if < 0 the expression is too expensive or has side effects)\r
1951         int OutputASM::cost(TIntermNode *expression, int budget)\r
1952         {\r
1953                 if(budget < 0)\r
1954                 {\r
1955                         return budget;\r
1956                 }\r
1957 \r
1958                 if(expression->getAsSymbolNode())\r
1959                 {\r
1960                         return budget;\r
1961                 }\r
1962                 else if(expression->getAsConstantUnion())\r
1963                 {\r
1964                         return budget;\r
1965                 }\r
1966                 else if(expression->getAsBinaryNode())\r
1967                 {\r
1968                         TIntermBinary *binary = expression->getAsBinaryNode();\r
1969 \r
1970                         switch(binary->getOp())\r
1971                         {\r
1972                         case EOpVectorSwizzle:\r
1973                         case EOpIndexDirect:\r
1974                         case EOpIndexDirectStruct:\r
1975                                 return cost(binary->getLeft(), budget - 0);\r
1976                         case EOpAdd:\r
1977                         case EOpSub:\r
1978                         case EOpMul:\r
1979                                 return cost(binary->getLeft(), cost(binary->getRight(), budget - 1));\r
1980                         default:\r
1981                                 return -1;\r
1982                         }\r
1983                 }\r
1984                 else if(expression->getAsUnaryNode())\r
1985                 {\r
1986                         TIntermUnary *unary = expression->getAsUnaryNode();\r
1987 \r
1988                         switch(unary->getOp())\r
1989                         {\r
1990                         case EOpAbs:\r
1991                         case EOpNegative:\r
1992                                 return cost(unary->getOperand(), budget - 1);\r
1993                         default:\r
1994                                 return -1;\r
1995                         }\r
1996                 }\r
1997                 else if(expression->getAsSelectionNode())\r
1998                 {\r
1999                         TIntermSelection *selection = expression->getAsSelectionNode();\r
2000 \r
2001                         if(selection->usesTernaryOperator())\r
2002                         {\r
2003                                 TIntermTyped *condition = selection->getCondition();\r
2004                                 TIntermNode *trueBlock = selection->getTrueBlock();\r
2005                                 TIntermNode *falseBlock = selection->getFalseBlock();\r
2006                                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
2007 \r
2008                                 if(constantCondition)\r
2009                                 {\r
2010                                         bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
2011 \r
2012                                         if(trueCondition)\r
2013                                         {\r
2014                                                 return cost(trueBlock, budget - 0);\r
2015                                         }\r
2016                                         else\r
2017                                         {\r
2018                                                 return cost(falseBlock, budget - 0);\r
2019                                         }\r
2020                                 }\r
2021                                 else\r
2022                                 {\r
2023                                         return cost(trueBlock, cost(falseBlock, budget - 2));\r
2024                                 }\r
2025                         }\r
2026                 }\r
2027 \r
2028                 return -1;\r
2029         }\r
2030 \r
2031         const Function *OutputASM::findFunction(const TString &name)\r
2032         {\r
2033                 for(unsigned int f = 0; f < functionArray.size(); f++)\r
2034                 {\r
2035                         if(functionArray[f].name == name)\r
2036                         {\r
2037                                 return &functionArray[f];\r
2038                         }\r
2039                 }\r
2040 \r
2041                 return 0;\r
2042         }\r
2043         \r
2044         int OutputASM::temporaryRegister(TIntermTyped *temporary)\r
2045         {\r
2046                 return allocate(temporaries, temporary);\r
2047         }\r
2048 \r
2049         int OutputASM::varyingRegister(TIntermTyped *varying)\r
2050         {\r
2051                 int var = lookup(varyings, varying);\r
2052 \r
2053                 if(var == -1)\r
2054                 {\r
2055                         var = allocate(varyings, varying);\r
2056                         int componentCount = varying->getNominalSize();\r
2057                         int registerCount = varying->totalRegisterCount();\r
2058 \r
2059                         if(pixelShader)\r
2060                         {\r
2061                                 if((var + registerCount) > sw::PixelShader::MAX_INPUT_VARYINGS)\r
2062                                 {\r
2063                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "fragment shader");\r
2064                                         return 0;\r
2065                                 }\r
2066 \r
2067                                 if(varying->getQualifier() == EvqPointCoord)\r
2068                                 {\r
2069                                         ASSERT(varying->isRegister());\r
2070                                         if(componentCount >= 1) pixelShader->semantic[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2071                                         if(componentCount >= 2) pixelShader->semantic[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2072                                         if(componentCount >= 3) pixelShader->semantic[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2073                                         if(componentCount >= 4) pixelShader->semantic[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2074                                 }\r
2075                                 else\r
2076                                 {\r
2077                                         for(int i = 0; i < varying->totalRegisterCount(); i++)\r
2078                                         {\r
2079                                                 if(componentCount >= 1) pixelShader->semantic[var + i][0] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2080                                                 if(componentCount >= 2) pixelShader->semantic[var + i][1] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2081                                                 if(componentCount >= 3) pixelShader->semantic[var + i][2] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2082                                                 if(componentCount >= 4) pixelShader->semantic[var + i][3] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2083                                         }\r
2084                                 }\r
2085                         }\r
2086                         else if(vertexShader)\r
2087                         {\r
2088                                 if((var + registerCount) > sw::VertexShader::MAX_OUTPUT_VARYINGS)\r
2089                                 {\r
2090                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "vertex shader");\r
2091                                         return 0;\r
2092                                 }\r
2093 \r
2094                                 if(varying->getQualifier() == EvqPosition)\r
2095                                 {\r
2096                                         ASSERT(varying->isRegister());\r
2097                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2098                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2099                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2100                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2101                                         vertexShader->positionRegister = var;\r
2102                                 }\r
2103                                 else if(varying->getQualifier() == EvqPointSize)\r
2104                                 {\r
2105                                         ASSERT(varying->isRegister());\r
2106                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2107                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2108                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2109                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2110                                         vertexShader->pointSizeRegister = var;\r
2111                                 }\r
2112                                 else\r
2113                                 {\r
2114                                         // Semantic indexes for user varyings will be assigned during program link to match the pixel shader\r
2115                                 }\r
2116                         }\r
2117                         else UNREACHABLE();\r
2118 \r
2119                         declareVarying(varying, var);\r
2120                 }\r
2121 \r
2122                 return var;\r
2123         }\r
2124 \r
2125         void OutputASM::declareVarying(TIntermTyped *varying, int reg)\r
2126         {\r
2127                 if(varying->getQualifier() != EvqPointCoord)   // gl_PointCoord does not need linking\r
2128                 {\r
2129                         const TType &type = varying->getType();\r
2130                         const char *name = varying->getAsSymbolNode()->getSymbol().c_str();\r
2131                         VaryingList &activeVaryings = shaderObject->varyings;\r
2132                         \r
2133                         // Check if this varying has been declared before without having a register assigned\r
2134                         for(VaryingList::iterator v = activeVaryings.begin(); v != activeVaryings.end(); v++)\r
2135                         {\r
2136                                 if(v->name == name)\r
2137                                 {\r
2138                                         if(reg >= 0)\r
2139                                         {\r
2140                                                 ASSERT(v->reg < 0 || v->reg == reg);\r
2141                                                 v->reg = reg;\r
2142                                         }\r
2143 \r
2144                                         return;\r
2145                                 }\r
2146                         }\r
2147                         \r
2148                         activeVaryings.push_back(glsl::Varying(glVariableType(type), name, varying->getArraySize(), reg, 0));\r
2149                 }\r
2150         }\r
2151 \r
2152         int OutputASM::uniformRegister(TIntermTyped *uniform)\r
2153         {\r
2154                 const TType &type = uniform->getType();\r
2155                 ASSERT(!IsSampler(type.getBasicType()));\r
2156                 TIntermSymbol *symbol = uniform->getAsSymbolNode();\r
2157                 ASSERT(symbol);\r
2158 \r
2159                 if(symbol)\r
2160                 {\r
2161                         int index = lookup(uniforms, uniform);\r
2162 \r
2163                         if(index == -1)\r
2164                         {\r
2165                                 index = allocate(uniforms, uniform);\r
2166                                 const TString &name = symbol->getSymbol().c_str();\r
2167 \r
2168                                 declareUniform(type, name, index);\r
2169                         }\r
2170 \r
2171                         return index;\r
2172                 }\r
2173 \r
2174                 return 0;\r
2175         }\r
2176 \r
2177         int OutputASM::attributeRegister(TIntermTyped *attribute)\r
2178         {\r
2179                 ASSERT(!attribute->isArray());\r
2180                 ASSERT(attribute->getBasicType() == EbtFloat);\r
2181 \r
2182                 int index = lookup(attributes, attribute);\r
2183 \r
2184                 if(index == -1)\r
2185                 {\r
2186                         TIntermSymbol *symbol = attribute->getAsSymbolNode();\r
2187                         ASSERT(symbol);\r
2188 \r
2189                         if(symbol)\r
2190                         {\r
2191                                 index = allocate(attributes, attribute);\r
2192                                 const TType &type = attribute->getType();\r
2193                                 int registerCount = attribute->totalRegisterCount();\r
2194 \r
2195                                 if(vertexShader && (index + registerCount) <= sw::VertexShader::MAX_INPUT_ATTRIBUTES)\r
2196                                 {\r
2197                                         for(int i = 0; i < registerCount; i++)\r
2198                                         {\r
2199                                                 vertexShader->input[index + i] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, index + i);\r
2200                                         }\r
2201                                 }\r
2202 \r
2203                                 ActiveAttributes &activeAttributes = shaderObject->activeAttributes;\r
2204 \r
2205                                 const char *name = symbol->getSymbol().c_str();\r
2206                                 activeAttributes.push_back(Attribute(glVariableType(type), name, 0, index));\r
2207                         }\r
2208                 }\r
2209 \r
2210                 return index;\r
2211         }\r
2212 \r
2213         int OutputASM::samplerRegister(TIntermTyped *sampler)\r
2214         {\r
2215                 ASSERT(IsSampler(sampler->getType().getBasicType()));\r
2216                 TIntermSymbol *symbol = sampler->getAsSymbolNode();\r
2217                 TIntermBinary *binary = sampler->getAsBinaryNode();\r
2218 \r
2219                 if(symbol)\r
2220                 {\r
2221                         return samplerRegister(symbol);\r
2222                 }\r
2223                 else if(binary)\r
2224                 {\r
2225                         ASSERT(binary->getOp() == EOpIndexDirect || binary->getOp() == EOpIndexIndirect || binary->getOp() == EOpIndexDirectStruct);\r
2226 \r
2227                         return samplerRegister(binary->getLeft());   // Index added later\r
2228                 }\r
2229                 else UNREACHABLE();\r
2230 \r
2231                 return 0;\r
2232         }\r
2233 \r
2234         int OutputASM::samplerRegister(TIntermSymbol *sampler)\r
2235         {\r
2236                 const TType &type = sampler->getType();\r
2237                 ASSERT(IsSampler(type.getBasicType()) || type.getStruct());   // Structures can contain samplers\r
2238 \r
2239                 int index = lookup(samplers, sampler);\r
2240 \r
2241                 if(index == -1)\r
2242                 {\r
2243                         index = allocate(samplers, sampler);\r
2244 \r
2245                         if(sampler->getQualifier() == EvqUniform)\r
2246                         {\r
2247                                 const char *name = sampler->getSymbol().c_str();\r
2248                                 declareUniform(type, name, index);\r
2249                         }\r
2250                 }\r
2251 \r
2252                 return index;\r
2253         }\r
2254 \r
2255         int OutputASM::lookup(VariableArray &list, TIntermTyped *variable)\r
2256         {\r
2257                 for(unsigned int i = 0; i < list.size(); i++)\r
2258                 {\r
2259                         if(list[i] == variable)\r
2260                         {\r
2261                                 return i;   // Pointer match\r
2262                         }\r
2263                 }\r
2264 \r
2265                 TIntermSymbol *varSymbol = variable->getAsSymbolNode();\r
2266 \r
2267                 if(varSymbol)\r
2268                 {\r
2269                         for(unsigned int i = 0; i < list.size(); i++)\r
2270                         {\r
2271                                 if(list[i])\r
2272                                 {\r
2273                                         TIntermSymbol *listSymbol = list[i]->getAsSymbolNode();\r
2274 \r
2275                                         if(listSymbol)\r
2276                                         {\r
2277                                                 if(listSymbol->getId() == varSymbol->getId())\r
2278                                                 {\r
2279                                                         ASSERT(listSymbol->getSymbol() == varSymbol->getSymbol());\r
2280                                                         ASSERT(listSymbol->getType() == varSymbol->getType());\r
2281                                                         ASSERT(listSymbol->getQualifier() == varSymbol->getQualifier());\r
2282 \r
2283                                                         return i;\r
2284                                                 }\r
2285                                         }\r
2286                                 }\r
2287                         }\r
2288                 }\r
2289 \r
2290                 return -1;\r
2291         }\r
2292 \r
2293         int OutputASM::allocate(VariableArray &list, TIntermTyped *variable)\r
2294         {\r
2295                 int index = lookup(list, variable);\r
2296 \r
2297                 if(index == -1)\r
2298                 {\r
2299                         unsigned int registerCount = variable->totalRegisterCount();\r
2300 \r
2301                         for(unsigned int i = 0; i < list.size(); i++)\r
2302                         {\r
2303                                 if(list[i] == 0)\r
2304                                 {\r
2305                                         unsigned int j = 1;\r
2306                                         for( ; j < registerCount && (i + j) < list.size(); j++)\r
2307                                         {\r
2308                                                 if(list[i + j] != 0)\r
2309                                                 {\r
2310                                                         break;\r
2311                                                 }\r
2312                                         }\r
2313 \r
2314                                         if(j == registerCount)   // Found free slots\r
2315                                         {\r
2316                                                 for(unsigned int j = 0; j < registerCount; j++)\r
2317                                                 {\r
2318                                                         list[i + j] = variable;\r
2319                                                 }\r
2320 \r
2321                                                 return i;\r
2322                                         }\r
2323                                 }\r
2324                         }\r
2325 \r
2326                         index = list.size();\r
2327 \r
2328                         for(unsigned int i = 0; i < registerCount; i++)\r
2329                         {\r
2330                                 list.push_back(variable);\r
2331                         }\r
2332                 }\r
2333 \r
2334                 return index;\r
2335         }\r
2336 \r
2337         void OutputASM::free(VariableArray &list, TIntermTyped *variable)\r
2338         {\r
2339                 int index = lookup(list, variable);\r
2340 \r
2341                 if(index >= 0)\r
2342                 {\r
2343                         list[index] = 0;\r
2344                 }\r
2345         }\r
2346 \r
2347         void OutputASM::declareUniform(const TType &type, const TString &name, int index)\r
2348         {\r
2349                 const TTypeList *structure = type.getStruct();\r
2350                 ActiveUniforms &activeUniforms = shaderObject->activeUniforms;\r
2351 \r
2352                 if(!structure)\r
2353                 {\r
2354                         activeUniforms.push_back(Uniform(glVariableType(type), glVariablePrecision(type), name.c_str(), type.getArraySize(), index));\r
2355 \r
2356                         if(isSamplerRegister(type))\r
2357                         {\r
2358                                 for(int i = 0; i < type.totalRegisterCount(); i++)\r
2359                                 {\r
2360                                         shader->declareSampler(index + i);\r
2361                                 }\r
2362                         }\r
2363                 }\r
2364                 else\r
2365                 {\r
2366                         if(type.isArray())\r
2367                         {\r
2368                                 int elementIndex = index;\r
2369 \r
2370                                 for(int i = 0; i < type.getArraySize(); i++)\r
2371                                 {\r
2372                                         for(size_t j = 0; j < structure->size(); j++)\r
2373                                         {\r
2374                                                 const TType &fieldType = *(*structure)[j].type;\r
2375                                                 const TString &fieldName = fieldType.getFieldName();\r
2376 \r
2377                                                 const TString uniformName = name + "[" + str(i) + "]." + fieldName;\r
2378                                                 declareUniform(fieldType, uniformName, elementIndex);\r
2379                                                 elementIndex += fieldType.totalRegisterCount();\r
2380                                         }\r
2381                                 }\r
2382                         }\r
2383                         else\r
2384                         {\r
2385                                 int fieldIndex = index;\r
2386 \r
2387                                 for(size_t i = 0; i < structure->size(); i++)\r
2388                                 {\r
2389                                         const TType &fieldType = *(*structure)[i].type;\r
2390                                         const TString &fieldName = fieldType.getFieldName();\r
2391 \r
2392                                         const TString uniformName = name + "." + fieldName;\r
2393                                         declareUniform(fieldType, uniformName, fieldIndex);\r
2394                                         fieldIndex += fieldType.totalRegisterCount();\r
2395                                 }\r
2396                         }\r
2397                 }\r
2398         }\r
2399 \r
2400         GLenum OutputASM::glVariableType(const TType &type)\r
2401         {\r
2402                 switch(type.getBasicType())\r
2403                 {\r
2404                 case EbtFloat:\r
2405                         if(type.isScalar())\r
2406                         {\r
2407                                 return GL_FLOAT;\r
2408                         }\r
2409                         else if(type.isVector())\r
2410                         {\r
2411                                 switch(type.getNominalSize())\r
2412                                 {\r
2413                                 case 2: return GL_FLOAT_VEC2;\r
2414                                 case 3: return GL_FLOAT_VEC3;\r
2415                                 case 4: return GL_FLOAT_VEC4;\r
2416                                 default: UNREACHABLE();\r
2417                                 }\r
2418                         }\r
2419                         else if(type.isMatrix())\r
2420                         {\r
2421                                 switch(type.getNominalSize())\r
2422                                 {\r
2423                                 case 2:\r
2424                                         switch(type.getSecondarySize())\r
2425                                         {\r
2426                                         case 2: return GL_FLOAT_MAT2;\r
2427                                         case 3: return GL_FLOAT_MAT2x3;\r
2428                                         case 4: return GL_FLOAT_MAT2x4;\r
2429                                         default: UNREACHABLE();\r
2430                                         }\r
2431                                 case 3:\r
2432                                         switch(type.getSecondarySize())\r
2433                                         {\r
2434                                         case 2: return GL_FLOAT_MAT3x2;\r
2435                                         case 3: return GL_FLOAT_MAT3;\r
2436                                         case 4: return GL_FLOAT_MAT3x4;\r
2437                                         default: UNREACHABLE();\r
2438                                         }\r
2439                                 case 4:\r
2440                                         switch(type.getSecondarySize())\r
2441                                         {\r
2442                                         case 2: return GL_FLOAT_MAT4x2;\r
2443                                         case 3: return GL_FLOAT_MAT4x3;\r
2444                                         case 4: return GL_FLOAT_MAT4;\r
2445                                         default: UNREACHABLE();\r
2446                                         }\r
2447                                 default: UNREACHABLE();\r
2448                                 }\r
2449                         }\r
2450                         else UNREACHABLE();\r
2451                         break;\r
2452                 case EbtInt:\r
2453                         if(type.isScalar())\r
2454                         {\r
2455                                 return GL_INT;\r
2456                         }\r
2457                         else if(type.isVector())\r
2458                         {\r
2459                                 switch(type.getNominalSize())\r
2460                                 {\r
2461                                 case 2: return GL_INT_VEC2;\r
2462                                 case 3: return GL_INT_VEC3;\r
2463                                 case 4: return GL_INT_VEC4;\r
2464                                 default: UNREACHABLE();\r
2465                                 }\r
2466                         }\r
2467                         else UNREACHABLE();\r
2468                         break;\r
2469                 case EbtUInt:\r
2470                         if(type.isScalar())\r
2471                         {\r
2472                                 return GL_UNSIGNED_INT;\r
2473                         }\r
2474                         else if(type.isVector())\r
2475                         {\r
2476                                 switch(type.getNominalSize())\r
2477                                 {\r
2478                                 case 2: return GL_UNSIGNED_INT_VEC2;\r
2479                                 case 3: return GL_UNSIGNED_INT_VEC3;\r
2480                                 case 4: return GL_UNSIGNED_INT_VEC4;\r
2481                                 default: UNREACHABLE();\r
2482                                 }\r
2483                         }\r
2484                         else UNREACHABLE();\r
2485                         break;\r
2486                 case EbtBool:\r
2487                         if(type.isScalar())\r
2488                         {\r
2489                                 return GL_BOOL;\r
2490                         }\r
2491                         else if(type.isVector())\r
2492                         {\r
2493                                 switch(type.getNominalSize())\r
2494                                 {\r
2495                                 case 2: return GL_BOOL_VEC2;\r
2496                                 case 3: return GL_BOOL_VEC3;\r
2497                                 case 4: return GL_BOOL_VEC4;\r
2498                                 default: UNREACHABLE();\r
2499                                 }\r
2500                         }\r
2501                         else UNREACHABLE();\r
2502                         break;\r
2503                 case EbtSampler2D:\r
2504                 case EbtISampler2D:\r
2505                 case EbtUSampler2D:\r
2506                         return GL_SAMPLER_2D;\r
2507                 case EbtSamplerCube:\r
2508                 case EbtISamplerCube:\r
2509                 case EbtUSamplerCube:\r
2510                         return GL_SAMPLER_CUBE;\r
2511                 case EbtSamplerExternalOES:\r
2512                         return GL_SAMPLER_EXTERNAL_OES;\r
2513                 case EbtSampler3D:\r
2514                 case EbtISampler3D:\r
2515                 case EbtUSampler3D:\r
2516                         return GL_SAMPLER_3D_OES;\r
2517                 case EbtSampler2DArray:\r
2518                 case EbtISampler2DArray:\r
2519                 case EbtUSampler2DArray:\r
2520                         return GL_SAMPLER_2D_ARRAY;\r
2521                 default:\r
2522                         UNREACHABLE();\r
2523                         break;\r
2524                 }\r
2525 \r
2526                 return GL_NONE;\r
2527         }\r
2528 \r
2529         GLenum OutputASM::glVariablePrecision(const TType &type)\r
2530         {\r
2531                 if(type.getBasicType() == EbtFloat)\r
2532                 {\r
2533                         switch(type.getPrecision())\r
2534                         {\r
2535                         case EbpHigh:   return GL_HIGH_FLOAT;\r
2536                         case EbpMedium: return GL_MEDIUM_FLOAT;\r
2537                         case EbpLow:    return GL_LOW_FLOAT;\r
2538                         case EbpUndefined:\r
2539                                 // Should be defined as the default precision by the parser\r
2540                         default: UNREACHABLE();\r
2541                         }\r
2542                 }\r
2543                 else if(type.getBasicType() == EbtInt)\r
2544                 {\r
2545                         switch (type.getPrecision())\r
2546                         {\r
2547                         case EbpHigh:   return GL_HIGH_INT;\r
2548                         case EbpMedium: return GL_MEDIUM_INT;\r
2549                         case EbpLow:    return GL_LOW_INT;\r
2550                         case EbpUndefined:\r
2551                                 // Should be defined as the default precision by the parser\r
2552                         default: UNREACHABLE();\r
2553                         }\r
2554                 }\r
2555 \r
2556                 // Other types (boolean, sampler) don't have a precision\r
2557                 return GL_NONE;\r
2558         }\r
2559 \r
2560         int OutputASM::dim(TIntermNode *v)\r
2561         {\r
2562                 TIntermTyped *vector = v->getAsTyped();\r
2563                 ASSERT(vector && vector->isRegister());\r
2564                 return vector->getNominalSize();\r
2565         }\r
2566 \r
2567         int OutputASM::dim2(TIntermNode *m)\r
2568         {\r
2569                 TIntermTyped *matrix = m->getAsTyped();\r
2570                 ASSERT(matrix && matrix->isMatrix() && !matrix->isArray());\r
2571                 return matrix->getSecondarySize();\r
2572         }\r
2573 \r
2574         // Returns ~0 if no loop count could be determined\r
2575         unsigned int OutputASM::loopCount(TIntermLoop *node)\r
2576         {\r
2577                 // Parse loops of the form:\r
2578                 // for(int index = initial; index [comparator] limit; index += increment)\r
2579                 TIntermSymbol *index = 0;\r
2580                 TOperator comparator = EOpNull;\r
2581                 int initial = 0;\r
2582                 int limit = 0;\r
2583                 int increment = 0;\r
2584 \r
2585                 // Parse index name and intial value\r
2586                 if(node->getInit())\r
2587                 {\r
2588                         TIntermAggregate *init = node->getInit()->getAsAggregate();\r
2589 \r
2590                         if(init)\r
2591                         {\r
2592                                 TIntermSequence &sequence = init->getSequence();\r
2593                                 TIntermTyped *variable = sequence[0]->getAsTyped();\r
2594 \r
2595                                 if(variable && variable->getQualifier() == EvqTemporary)\r
2596                                 {\r
2597                                         TIntermBinary *assign = variable->getAsBinaryNode();\r
2598 \r
2599                                         if(assign->getOp() == EOpInitialize)\r
2600                                         {\r
2601                                                 TIntermSymbol *symbol = assign->getLeft()->getAsSymbolNode();\r
2602                                                 TIntermConstantUnion *constant = assign->getRight()->getAsConstantUnion();\r
2603 \r
2604                                                 if(symbol && constant)\r
2605                                                 {\r
2606                                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2607                                                         {\r
2608                                                                 index = symbol;\r
2609                                                                 initial = constant->getUnionArrayPointer()[0].getIConst();\r
2610                                                         }\r
2611                                                 }\r
2612                                         }\r
2613                                 }\r
2614                         }\r
2615                 }\r
2616 \r
2617                 // Parse comparator and limit value\r
2618                 if(index && node->getCondition())\r
2619                 {\r
2620                         TIntermBinary *test = node->getCondition()->getAsBinaryNode();\r
2621 \r
2622                         if(test && test->getLeft()->getAsSymbolNode()->getId() == index->getId())\r
2623                         {\r
2624                                 TIntermConstantUnion *constant = test->getRight()->getAsConstantUnion();\r
2625 \r
2626                                 if(constant)\r
2627                                 {\r
2628                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2629                                         {\r
2630                                                 comparator = test->getOp();\r
2631                                                 limit = constant->getUnionArrayPointer()[0].getIConst();\r
2632                                         }\r
2633                                 }\r
2634                         }\r
2635                 }\r
2636 \r
2637                 // Parse increment\r
2638                 if(index && comparator != EOpNull && node->getExpression())\r
2639                 {\r
2640                         TIntermBinary *binaryTerminal = node->getExpression()->getAsBinaryNode();\r
2641                         TIntermUnary *unaryTerminal = node->getExpression()->getAsUnaryNode();\r
2642 \r
2643                         if(binaryTerminal)\r
2644                         {\r
2645                                 TOperator op = binaryTerminal->getOp();\r
2646                                 TIntermConstantUnion *constant = binaryTerminal->getRight()->getAsConstantUnion();\r
2647 \r
2648                                 if(constant)\r
2649                                 {\r
2650                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2651                                         {\r
2652                                                 int value = constant->getUnionArrayPointer()[0].getIConst();\r
2653 \r
2654                                                 switch(op)\r
2655                                                 {\r
2656                                                 case EOpAddAssign: increment = value;  break;\r
2657                                                 case EOpSubAssign: increment = -value; break;\r
2658                                                 default: UNIMPLEMENTED();\r
2659                                                 }\r
2660                                         }\r
2661                                 }\r
2662                         }\r
2663                         else if(unaryTerminal)\r
2664                         {\r
2665                                 TOperator op = unaryTerminal->getOp();\r
2666 \r
2667                                 switch(op)\r
2668                                 {\r
2669                                 case EOpPostIncrement: increment = 1;  break;\r
2670                                 case EOpPostDecrement: increment = -1; break;\r
2671                                 case EOpPreIncrement:  increment = 1;  break;\r
2672                                 case EOpPreDecrement:  increment = -1; break;\r
2673                                 default: UNIMPLEMENTED();\r
2674                                 }\r
2675                         }\r
2676                 }\r
2677 \r
2678                 if(index && comparator != EOpNull && increment != 0)\r
2679                 {\r
2680                         if(comparator == EOpLessThanEqual)\r
2681                         {\r
2682                                 comparator = EOpLessThan;\r
2683                                 limit += 1;\r
2684                         }\r
2685 \r
2686                         if(comparator == EOpLessThan)\r
2687                         {\r
2688                                 int iterations = (limit - initial) / increment;\r
2689 \r
2690                                 if(iterations <= 0)\r
2691                                 {\r
2692                                         iterations = 0;\r
2693                                 }\r
2694 \r
2695                                 return iterations;\r
2696                         }\r
2697                         else UNIMPLEMENTED();   // Falls through\r
2698                 }\r
2699 \r
2700                 return ~0;\r
2701         }\r
2702 \r
2703         bool DetectLoopDiscontinuity::traverse(TIntermNode *node)\r
2704         {\r
2705                 loopDepth = 0;\r
2706                 loopDiscontinuity = false;\r
2707                 \r
2708                 node->traverse(this);\r
2709                 \r
2710                 return loopDiscontinuity;\r
2711         }\r
2712 \r
2713         bool DetectLoopDiscontinuity::visitLoop(Visit visit, TIntermLoop *loop)\r
2714         {\r
2715                 if(visit == PreVisit)\r
2716                 {\r
2717                         loopDepth++;\r
2718                 }\r
2719                 else if(visit == PostVisit)\r
2720                 {\r
2721                         loopDepth++;\r
2722                 }\r
2723 \r
2724                 return true;\r
2725         }\r
2726 \r
2727         bool DetectLoopDiscontinuity::visitBranch(Visit visit, TIntermBranch *node)\r
2728         {\r
2729                 if(loopDiscontinuity)\r
2730                 {\r
2731                         return false;\r
2732                 }\r
2733 \r
2734                 if(!loopDepth)\r
2735                 {\r
2736                         return true;\r
2737                 }\r
2738         \r
2739                 switch(node->getFlowOp())\r
2740                 {\r
2741                 case EOpKill:\r
2742                         break;\r
2743                 case EOpBreak:\r
2744                 case EOpContinue:\r
2745                 case EOpReturn:\r
2746                         loopDiscontinuity = true;\r
2747                         break;\r
2748                 default: UNREACHABLE();\r
2749                 }\r
2750 \r
2751                 return !loopDiscontinuity;\r
2752         }\r
2753 \r
2754         bool DetectLoopDiscontinuity::visitAggregate(Visit visit, TIntermAggregate *node)\r
2755         {\r
2756                 return !loopDiscontinuity;\r
2757         }\r
2758 }\r