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.getTreeRoot()->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 || symbol->getQualifier() == EvqVertexOut)\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(0);\r
 289                                 }\r
 290                                 else UNREACHABLE(0);\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(0);\r
 322                         }\r
 323                         break;\r
 324                 case EOpIndexDirectStruct:\r
 325                 case EOpIndexDirectInterfaceBlock:\r
 326                         if(visit == PostVisit)\r
 327                         {\r
 328                                 ASSERT(leftType.isStruct() || (leftType.isInterfaceBlock()));\r
 329 \r
 330                                 const TFieldList& fields = (node->getOp() == EOpIndexDirectStruct) ?\r
 331                                                            leftType.getStruct()->fields() :\r
 332                                                            leftType.getInterfaceBlock()->fields();\r
 333                                 int index = right->getAsConstantUnion()->getIConst(0);\r
 334                                 int fieldOffset = 0;\r
 335 \r
 336                                 for(int i = 0; i < index; i++)\r
 337                                 {\r
 338                                         fieldOffset += fields[i]->type()->totalRegisterCount();\r
 339                                 }\r
 340 \r
 341                                 copy(result, left, fieldOffset);\r
 342                         }\r
 343                         break;\r
 344                 case EOpVectorSwizzle:\r
 345                         if(visit == PostVisit)\r
 346                         {\r
 347                                 int swizzle = 0;\r
 348                                 TIntermAggregate *components = right->getAsAggregate();\r
 349 \r
 350                                 if(components)\r
 351                                 {\r
 352                                         TIntermSequence &sequence = components->getSequence();\r
 353                                         int component = 0;\r
 354 \r
 355                                         for(TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); sit++)\r
 356                                         {\r
 357                                                 TIntermConstantUnion *element = (*sit)->getAsConstantUnion();\r
 358 \r
 359                                                 if(element)\r
 360                                                 {\r
 361                                                         int i = element->getUnionArrayPointer()[0].getIConst();\r
 362                                                         swizzle |= i << (component * 2);\r
 363                                                         component++;\r
 364                                                 }\r
 365                                                 else UNREACHABLE(0);\r
 366                                         }\r
 367                                 }\r
 368                                 else UNREACHABLE(0);\r
 369 \r
 370                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 371                                 mov->src[0].swizzle = swizzle;\r
 372                         }\r
 373                         break;\r
 374                 case EOpAddAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_ADD, result, left, left, right); break;\r
 375                 case EOpAdd:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_ADD, result, left, right);       break;\r
 376                 case EOpSubAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_SUB, result, left, left, right); break;\r
 377                 case EOpSub:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_SUB, result, left, right);       break;\r
 378                 case EOpMulAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 379                 case EOpMul:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_MUL, result, left, right);       break;\r
 380                 case EOpDivAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_DIV, result, left, left, right); break;\r
 381                 case EOpDiv:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_DIV, result, left, right);       break;\r
 382                 case EOpEqual:\r
 383                         if(visit == PostVisit)\r
 384                         {\r
 385                                 emitCmp(sw::Shader::CONTROL_EQ, result, left, right);\r
 386 \r
 387                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 388                                 {\r
 389                                         Temporary equal(this);\r
 390                                         emitCmp(sw::Shader::CONTROL_EQ, &equal, left, right, index);\r
 391                                         emit(sw::Shader::OPCODE_AND, result, result, &equal);\r
 392                                 }\r
 393                         }\r
 394                         break;\r
 395                 case EOpNotEqual:\r
 396                         if(visit == PostVisit)\r
 397                         {\r
 398                                 emitCmp(sw::Shader::CONTROL_NE, result, left, right);\r
 399 \r
 400                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 401                                 {\r
 402                                         Temporary notEqual(this);\r
 403                                         emitCmp(sw::Shader::CONTROL_NE, &notEqual, left, right, index);\r
 404                                         emit(sw::Shader::OPCODE_OR, result, result, &notEqual);\r
 405                                 }\r
 406                         }\r
 407                         break;\r
 408                 case EOpLessThan:                if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, left, right); break;\r
 409                 case EOpGreaterThan:             if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, left, right); break;\r
 410                 case EOpLessThanEqual:           if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, left, right); break;\r
 411                 case EOpGreaterThanEqual:        if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, left, right); break;\r
 412                 case EOpVectorTimesScalarAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 413                 case EOpVectorTimesScalar:       if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, left, right); break;\r
 414                 case EOpMatrixTimesScalar:\r
 415                         if(visit == PostVisit)\r
 416                         {\r
 417                                 for(int i = 0; i < leftType.getNominalSize(); i++)\r
 418                                 {\r
 419                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 420                                         mul->dst.index += i;\r
 421                                         argument(mul->src[0], left, i);\r
 422                                 }\r
 423                         }\r
 424                         break;\r
 425                 case EOpVectorTimesMatrix:\r
 426                         if(visit == PostVisit)\r
 427                         {\r
 428                                 int size = leftType.getNominalSize();\r
 429 \r
 430                                 for(int i = 0; i < size; i++)\r
 431                                 {\r
 432                                         Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, left, right);\r
 433                                         dot->dst.mask = 1 << i;\r
 434                                         argument(dot->src[1], right, i);\r
 435                                 }\r
 436                         }\r
 437                         break;\r
 438                 case EOpMatrixTimesVector:\r
 439                         if(visit == PostVisit)\r
 440                         {\r
 441                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 442                                 mul->src[1].swizzle = 0x00;\r
 443 \r
 444                                 for(int i = 1; i < leftType.getNominalSize(); i++)\r
 445                                 {\r
 446                                         Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 447                                         argument(mad->src[0], left, i);\r
 448                                         mad->src[1].swizzle = i * 0x55;\r
 449                                 }\r
 450                         }\r
 451                         break;\r
 452                 case EOpMatrixTimesMatrix:\r
 453                         if(visit == PostVisit)\r
 454                         {\r
 455                                 int dim = leftType.getNominalSize();\r
 456 \r
 457                                 for(int i = 0; i < dim; i++)\r
 458                                 {\r
 459                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 460                                         mul->dst.index += i;\r
 461                                         argument(mul->src[1], right, i);\r
 462                                         mul->src[1].swizzle = 0x00;\r
 463 \r
 464                                         for(int j = 1; j < dim; j++)\r
 465                                         {\r
 466                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 467                                                 mad->dst.index += i;\r
 468                                                 argument(mad->src[0], left, j);\r
 469                                                 argument(mad->src[1], right, i);\r
 470                                                 mad->src[1].swizzle = j * 0x55;\r
 471                                                 argument(mad->src[2], result, i);\r
 472                                         }\r
 473                                 }\r
 474                         }\r
 475                         break;\r
 476                 case EOpLogicalOr:\r
 477                         if(trivial(right, 6))\r
 478                         {\r
 479                                 if(visit == PostVisit)\r
 480                                 {\r
 481                                         emit(sw::Shader::OPCODE_OR, result, left, right);\r
 482                                 }\r
 483                         }\r
 484                         else   // Short-circuit evaluation\r
 485                         {\r
 486                                 if(visit == InVisit)\r
 487                                 {\r
 488                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 489                                         Instruction *ifnot = emit(sw::Shader::OPCODE_IF, 0, result);\r
 490                                         ifnot->src[0].modifier = sw::Shader::MODIFIER_NOT;\r
 491                                 }\r
 492                                 else if(visit == PostVisit)\r
 493                                 {\r
 494                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 495                                         emit(sw::Shader::OPCODE_ENDIF);\r
 496                                 }\r
 497                         }\r
 498                         break;\r
 499                 case EOpLogicalXor:        if(visit == PostVisit) emit(sw::Shader::OPCODE_XOR, result, left, right); break;\r
 500                 case EOpLogicalAnd:\r
 501                         if(trivial(right, 6))\r
 502                         {\r
 503                                 if(visit == PostVisit)\r
 504                                 {\r
 505                                         emit(sw::Shader::OPCODE_AND, result, left, right);\r
 506                                 }\r
 507                         }\r
 508                         else   // Short-circuit evaluation\r
 509                         {\r
 510                                 if(visit == InVisit)\r
 511                                 {\r
 512                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 513                                         emit(sw::Shader::OPCODE_IF, 0, result);\r
 514                                 }\r
 515                                 else if(visit == PostVisit)\r
 516                                 {\r
 517                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 518                                         emit(sw::Shader::OPCODE_ENDIF);\r
 519                                 }\r
 520                         }\r
 521                         break;\r
 522                 default: UNREACHABLE(node->getOp());\r
 523                 }\r
 524 \r
 525                 return true;\r
 526         }\r
 527 \r
 528         bool OutputASM::visitUnary(Visit visit, TIntermUnary *node)\r
 529         {\r
 530                 if(currentScope != emitScope)\r
 531                 {\r
 532                         return false;\r
 533                 }\r
 534 \r
 535                 Constant one(1.0f, 1.0f, 1.0f, 1.0f);\r
 536                 Constant rad(1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f);\r
 537                 Constant deg(5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f);\r
 538 \r
 539                 TIntermTyped *result = node;\r
 540                 TIntermTyped *arg = node->getOperand();\r
 541 \r
 542                 switch(node->getOp())\r
 543                 {\r
 544                 case EOpNegative:\r
 545                         if(visit == PostVisit)\r
 546                         {\r
 547                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 548                                 {\r
 549                                         Instruction *neg = emit(sw::Shader::OPCODE_MOV, result, arg);\r
 550                                         neg->dst.index += index;\r
 551                                         argument(neg->src[0], arg, index);\r
 552                                         neg->src[0].modifier = sw::Shader::MODIFIER_NEGATE;\r
 553                                 }\r
 554                         }\r
 555                         break;\r
 556                 case EOpVectorLogicalNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 557                 case EOpLogicalNot:       if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 558                 case EOpPostIncrement:\r
 559                         if(visit == PostVisit)\r
 560                         {\r
 561                                 copy(result, arg);\r
 562 \r
 563                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 564                                 {\r
 565                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, arg, arg, &one);\r
 566                                         add->dst.index += index;\r
 567                                         argument(add->src[0], arg, index);\r
 568                                 }\r
 569 \r
 570                                 assignLvalue(arg, arg);\r
 571                         }\r
 572                         break;\r
 573                 case EOpPostDecrement:\r
 574                         if(visit == PostVisit)\r
 575                         {\r
 576                                 copy(result, arg);\r
 577 \r
 578                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 579                                 {\r
 580                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, arg, arg, &one);\r
 581                                         sub->dst.index += index;\r
 582                                         argument(sub->src[0], arg, index);\r
 583                                 }\r
 584 \r
 585                                 assignLvalue(arg, arg);\r
 586                         }\r
 587                         break;\r
 588                 case EOpPreIncrement:\r
 589                         if(visit == PostVisit)\r
 590                         {\r
 591                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 592                                 {\r
 593                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, result, arg, &one);\r
 594                                         add->dst.index += index;\r
 595                                         argument(add->src[0], arg, index);\r
 596                                 }\r
 597 \r
 598                                 assignLvalue(arg, result);\r
 599                         }\r
 600                         break;\r
 601                 case EOpPreDecrement:\r
 602                         if(visit == PostVisit)\r
 603                         {\r
 604                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 605                                 {\r
 606                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, result, arg, &one);\r
 607                                         sub->dst.index += index;\r
 608                                         argument(sub->src[0], arg, index);\r
 609                                 }\r
 610 \r
 611                                 assignLvalue(arg, result);\r
 612                         }\r
 613                         break;\r
 614                 case EOpRadians:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &rad); break;\r
 615                 case EOpDegrees:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &deg); break;\r
 616                 case EOpSin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_SIN, result, arg); break;\r
 617                 case EOpCos:              if(visit == PostVisit) emit(sw::Shader::OPCODE_COS, result, arg); break;\r
 618                 case EOpTan:              if(visit == PostVisit) emit(sw::Shader::OPCODE_TAN, result, arg); break;\r
 619                 case EOpAsin:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ASIN, result, arg); break;\r
 620                 case EOpAcos:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOS, result, arg); break;\r
 621                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN, result, arg); break;\r
 622                 case EOpSinh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SINH, result, arg); break;\r
 623                 case EOpCosh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_COSH, result, arg); break;\r
 624                 case EOpTanh:             if(visit == PostVisit) emit(sw::Shader::OPCODE_TANH, result, arg); break;\r
 625                 case EOpAsinh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ASINH, result, arg); break;\r
 626                 case EOpAcosh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOSH, result, arg); break;\r
 627                 case EOpAtanh:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ATANH, result, arg); break;\r
 628                 case EOpExp:              if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP, result, arg); break;\r
 629                 case EOpLog:              if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG, result, arg); break;\r
 630                 case EOpExp2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP2, result, arg); break;\r
 631                 case EOpLog2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG2, result, arg); break;\r
 632                 case EOpSqrt:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SQRT, result, arg); break;\r
 633                 case EOpInverseSqrt:      if(visit == PostVisit) emit(sw::Shader::OPCODE_RSQ, result, arg); break;\r
 634                 case EOpAbs:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ABS, result, arg); break;\r
 635                 case EOpSign:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SGN, result, arg); break;\r
 636                 case EOpFloor:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOOR, result, arg); break;\r
 637                 case EOpTrunc:            if(visit == PostVisit) emit(sw::Shader::OPCODE_TRUNC, result, arg); break;\r
 638                 case EOpRound:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUND, result, arg); break;\r
 639                 case EOpRoundEven:        if(visit == PostVisit) emit(sw::Shader::OPCODE_ROUNDEVEN, result, arg); break;\r
 640                 case EOpCeil:             if(visit == PostVisit) emit(sw::Shader::OPCODE_CEIL, result, arg, result); break;\r
 641                 case EOpFract:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FRC, result, arg); break;\r
 642                 case EOpIsNan:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ISNAN, result, arg); break;\r
 643                 case EOpIsInf:            if(visit == PostVisit) emit(sw::Shader::OPCODE_ISINF, result, arg); break;\r
 644                 case EOpLength:           if(visit == PostVisit) emit(sw::Shader::OPCODE_LEN(dim(arg)), result, arg); break;\r
 645                 case EOpNormalize:        if(visit == PostVisit) emit(sw::Shader::OPCODE_NRM(dim(arg)), result, arg); break;\r
 646                 case EOpDFdx:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDX, result, arg); break;\r
 647                 case EOpDFdy:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDY, result, arg); break;\r
 648                 case EOpFwidth:           if(visit == PostVisit) emit(sw::Shader::OPCODE_FWIDTH, result, arg); break;\r
 649                 case EOpAny:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ANY, result, arg); break;\r
 650                 case EOpAll:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ALL, result, arg); break;\r
 651                 case EOpFloatBitsToInt:   if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOINT, result, arg); break;\r
 652                 case EOpFloatBitsToUint:  if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOATBITSTOUINT, result, arg); break;\r
 653                 case EOpIntBitsToFloat:   if(visit == PostVisit) emit(sw::Shader::OPCODE_INTBITSTOFLOAT, result, arg); break;\r
 654                 case EOpUintBitsToFloat:  if(visit == PostVisit) emit(sw::Shader::OPCODE_UINTBITSTOFLOAT, result, arg); break;\r
 655                 case EOpPackSnorm2x16:    if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKSNORM2x16, result, arg); break;\r
 656                 case EOpPackUnorm2x16:    if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKUNORM2x16, result, arg); break;\r
 657                 case EOpPackHalf2x16:     if(visit == PostVisit) emit(sw::Shader::OPCODE_PACKHALF2x16, result, arg); break;\r
 658                 case EOpUnpackSnorm2x16:  if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKSNORM2x16, result, arg); break;\r
 659                 case EOpUnpackUnorm2x16:  if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKUNORM2x16, result, arg); break;\r
 660                 case EOpUnpackHalf2x16:   if(visit == PostVisit) emit(sw::Shader::OPCODE_UNPACKHALF2x16, result, arg); break;\r
 661                 case EOpTranspose:\r
 662                         if(visit == PostVisit)\r
 663                         {\r
 664                                 int numCols = arg->getNominalSize();\r
 665                                 int numRows = arg->getSecondarySize();\r
 666                                 for(int i = 0; i < numCols; ++i)\r
 667                                 {\r
 668                                         for(int j = 0; j < numRows; ++j)\r
 669                                         {\r
 670                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, arg);\r
 671                                                 mov->src[0].index += i;\r
 672                                                 mov->src[0].swizzle = 0x55 * j;\r
 673                                                 mov->dst.index += j;\r
 674                                                 mov->dst.mask = 1 << i;\r
 675                                         }\r
 676                                 }\r
 677                         }\r
 678                         break;\r
 679                 default: UNREACHABLE(node->getOp());\r
 680                 }\r
 681 \r
 682                 return true;\r
 683         }\r
 684 \r
 685         bool OutputASM::visitAggregate(Visit visit, TIntermAggregate *node)\r
 686         {\r
 687                 if(currentScope != emitScope && node->getOp() != EOpFunction && node->getOp() != EOpSequence)\r
 688                 {\r
 689                         return false;\r
 690                 }\r
 691 \r
 692                 Constant zero(0.0f, 0.0f, 0.0f, 0.0f);\r
 693 \r
 694                 TIntermTyped *result = node;\r
 695                 const TType &resultType = node->getType();\r
 696                 TIntermSequence &arg = node->getSequence();\r
 697                 int argumentCount = arg.size();\r
 698 \r
 699                 switch(node->getOp())\r
 700                 {\r
 701                 case EOpSequence:           break;\r
 702                 case EOpDeclaration:        break;\r
 703                 case EOpPrototype:          break;\r
 704                 case EOpComma:\r
 705                         if(visit == PostVisit)\r
 706                         {\r
 707                                 copy(result, arg[1]);\r
 708                         }\r
 709                         break;\r
 710                 case EOpFunction:\r
 711                         if(visit == PreVisit)\r
 712                         {\r
 713                                 const TString &name = node->getName();\r
 714 \r
 715                                 if(emitScope == FUNCTION)\r
 716                                 {\r
 717                                         if(functionArray.size() > 1)   // No need for a label when there's only main()\r
 718                                         {\r
 719                                                 Instruction *label = emit(sw::Shader::OPCODE_LABEL);\r
 720                                                 label->dst.type = sw::Shader::PARAMETER_LABEL;\r
 721 \r
 722                                                 const Function *function = findFunction(name);\r
 723                                                 ASSERT(function);   // Should have been added during global pass\r
 724                                                 label->dst.index = function->label;\r
 725                                                 currentFunction = function->label;\r
 726                                         }\r
 727                                 }\r
 728                                 else if(emitScope == GLOBAL)\r
 729                                 {\r
 730                                         if(name != "main(")\r
 731                                         {\r
 732                                                 TIntermSequence &arguments = node->getSequence()[0]->getAsAggregate()->getSequence();\r
 733                                                 functionArray.push_back(Function(functionArray.size(), name, &arguments, node));\r
 734                                         }\r
 735                                 }\r
 736                                 else UNREACHABLE(emitScope);\r
 737 \r
 738                                 currentScope = FUNCTION;\r
 739                         }\r
 740                         else if(visit == PostVisit)\r
 741                         {\r
 742                                 if(emitScope == FUNCTION)\r
 743                                 {\r
 744                                         if(functionArray.size() > 1)   // No need to return when there's only main()\r
 745                                         {\r
 746                                                 emit(sw::Shader::OPCODE_RET);\r
 747                                         }\r
 748                                 }\r
 749 \r
 750                                 currentScope = GLOBAL;\r
 751                         }\r
 752                         break;\r
 753                 case EOpFunctionCall:\r
 754                         if(visit == PostVisit)\r
 755                         {\r
 756                                 if(node->isUserDefined())\r
 757                                 {\r
 758                                         const TString &name = node->getName();\r
 759                                         const Function *function = findFunction(name);\r
 760 \r
 761                                         if(!function)\r
 762                                         {\r
 763                                                 mContext.error(node->getLine(), "function definition not found", name.c_str());\r
 764                                                 return false;\r
 765                                         }\r
 766 \r
 767                                         TIntermSequence &arguments = *function->arg;\r
 768 \r
 769                                         for(int i = 0; i < argumentCount; i++)\r
 770                                         {\r
 771                                                 TIntermTyped *in = arguments[i]->getAsTyped();\r
 772 \r
 773                                                 if(in->getQualifier() == EvqIn ||\r
 774                                                    in->getQualifier() == EvqInOut ||\r
 775                                                    in->getQualifier() == EvqConstReadOnly)\r
 776                                                 {\r
 777                                                         copy(in, arg[i]);\r
 778                                                 }\r
 779                                         }\r
 780 \r
 781                                         Instruction *call = emit(sw::Shader::OPCODE_CALL);\r
 782                                         call->dst.type = sw::Shader::PARAMETER_LABEL;\r
 783                                         call->dst.index = function->label;\r
 784 \r
 785                                         if(function->ret && function->ret->getType().getBasicType() != EbtVoid)\r
 786                                         {\r
 787                                                 copy(result, function->ret);\r
 788                                         }\r
 789 \r
 790                                         for(int i = 0; i < argumentCount; i++)\r
 791                                         {\r
 792                                                 TIntermTyped *argument = arguments[i]->getAsTyped();\r
 793                                                 TIntermTyped *out = arg[i]->getAsTyped();\r
 794                                                                 \r
 795                                                 if(argument->getQualifier() == EvqOut ||\r
 796                                                    argument->getQualifier() == EvqInOut)\r
 797                                                 {\r
 798                                                         copy(out, argument);\r
 799                                                 }\r
 800                                         }\r
 801                                 }\r
 802                                 else\r
 803                                 {\r
 804                                         TString name = TFunction::unmangleName(node->getName());\r
 805 \r
 806                                         if(name == "texture" || name == "texture2D" || name == "textureCube" || name == "texture3D")\r
 807                                         {\r
 808                                                 if(argumentCount == 2)\r
 809                                                 {\r
 810                                                         emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 811                                                 }\r
 812                                                 else if(argumentCount == 3)   // bias\r
 813                                                 {\r
 814                                                         Temporary uvwb(this);\r
 815                                                         emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 816                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 817                                                         bias->dst.mask = 0x8;\r
 818 \r
 819                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &uvwb, arg[0]);   // FIXME: Implement an efficient TEXLDB instruction\r
 820                                                         tex->bias = true;\r
 821                                                 }\r
 822                                                 else UNREACHABLE(argumentCount);\r
 823                                         }\r
 824                                         else if(name == "texture2DProj")\r
 825                                         {\r
 826                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 827 \r
 828                                                 if(argumentCount == 2)\r
 829                                                 {\r
 830                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 831                                                         tex->project = true;\r
 832 \r
 833                                                         if(t->getNominalSize() == 3)\r
 834                                                         {\r
 835                                                                 tex->src[0].swizzle = 0xA4;\r
 836                                                         }\r
 837                                                         else ASSERT(t->getNominalSize() == 4);\r
 838                                                 }\r
 839                                                 else if(argumentCount == 3)   // bias\r
 840                                                 {\r
 841                                                         Temporary proj(this);\r
 842 \r
 843                                                         if(t->getNominalSize() == 3)\r
 844                                                         {\r
 845                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 846                                                                 div->src[1].swizzle = 0xAA;\r
 847                                                                 div->dst.mask = 0x3;\r
 848                                                         }\r
 849                                                         else if(t->getNominalSize() == 4)\r
 850                                                         {\r
 851                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 852                                                                 div->src[1].swizzle = 0xFF;\r
 853                                                                 div->dst.mask = 0x3;\r
 854                                                         }\r
 855                                                         else UNREACHABLE(t->getNominalSize());\r
 856 \r
 857                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 858                                                         bias->dst.mask = 0x8;\r
 859 \r
 860                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &proj, arg[0]);\r
 861                                                         tex->bias = true;\r
 862                                                 }\r
 863                                                 else UNREACHABLE(argumentCount);\r
 864                                         }\r
 865                                         else if(name == "texture2DLod" || name == "textureCubeLod")\r
 866                                         {\r
 867                                                 Temporary uvwb(this);\r
 868                                                 emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 869                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 870                                                 lod->dst.mask = 0x8;\r
 871 \r
 872                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &uvwb, arg[0]);\r
 873                                         }\r
 874                                         else if(name == "texture2DProjLod")\r
 875                                         {\r
 876                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 877                                                 Temporary proj(this);\r
 878 \r
 879                                                 if(t->getNominalSize() == 3)\r
 880                                                 {\r
 881                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 882                                                         div->src[1].swizzle = 0xAA;\r
 883                                                         div->dst.mask = 0x3;\r
 884                                                 }\r
 885                                                 else if(t->getNominalSize() == 4)\r
 886                                                 {\r
 887                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 888                                                         div->src[1].swizzle = 0xFF;\r
 889                                                         div->dst.mask = 0x3;\r
 890                                                 }\r
 891                                                 else UNREACHABLE(t->getNominalSize());\r
 892 \r
 893                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 894                                                 lod->dst.mask = 0x8;\r
 895 \r
 896                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &proj, arg[0]);\r
 897                                         }\r
 898                                         else UNREACHABLE(0);\r
 899                                 }\r
 900                         }\r
 901                         break;\r
 902                 case EOpParameters:\r
 903                         break;\r
 904                 case EOpConstructFloat:\r
 905                 case EOpConstructVec2:\r
 906                 case EOpConstructVec3:\r
 907                 case EOpConstructVec4:\r
 908                 case EOpConstructBool:\r
 909                 case EOpConstructBVec2:\r
 910                 case EOpConstructBVec3:\r
 911                 case EOpConstructBVec4:\r
 912                 case EOpConstructInt:\r
 913                 case EOpConstructIVec2:\r
 914                 case EOpConstructIVec3:\r
 915                 case EOpConstructIVec4:\r
 916                 case EOpConstructUInt:\r
 917                 case EOpConstructUVec2:\r
 918                 case EOpConstructUVec3:\r
 919                 case EOpConstructUVec4:\r
 920                         if(visit == PostVisit)\r
 921                         {\r
 922                                 int component = 0;\r
 923 \r
 924                                 for(int i = 0; i < argumentCount; i++)\r
 925                                 {\r
 926                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
 927                                         int size = argi->getNominalSize();\r
 928 \r
 929                                         if(!argi->isMatrix())\r
 930                                         {\r
 931                                                 Instruction *mov = emitCast(result, argi);\r
 932                                                 mov->dst.mask = (0xF << component) & 0xF;\r
 933                                                 mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 934 \r
 935                                                 component += size;\r
 936                                         }\r
 937                                         else   // Matrix\r
 938                                         {\r
 939                                                 int column = 0;\r
 940 \r
 941                                                 while(component < resultType.getNominalSize())\r
 942                                                 {\r
 943                                                         Instruction *mov = emitCast(result, argi);\r
 944                                                         mov->dst.mask = (0xF << component) & 0xF;\r
 945                                                         mov->src[0].index += column;\r
 946                                                         mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 947 \r
 948                                                         column++;\r
 949                                                         component += size;\r
 950                                                 }\r
 951                                         }\r
 952                                 }\r
 953                         }\r
 954                         break;\r
 955                 case EOpConstructMat2:\r
 956                 case EOpConstructMat2x3:\r
 957                 case EOpConstructMat2x4:\r
 958                 case EOpConstructMat3x2:\r
 959                 case EOpConstructMat3:\r
 960                 case EOpConstructMat3x4:\r
 961                 case EOpConstructMat4x2:\r
 962                 case EOpConstructMat4x3:\r
 963                 case EOpConstructMat4:\r
 964                         if(visit == PostVisit)\r
 965                         {\r
 966                                 TIntermTyped *arg0 = arg[0]->getAsTyped();\r
 967                                 const int dim = result->getNominalSize();\r
 968 \r
 969                                 if(arg0->isScalar() && arg.size() == 1)   // Construct scale matrix\r
 970                                 {\r
 971                                         for(int i = 0; i < dim; i++)\r
 972                                         {\r
 973                                                 Instruction *init = emit(sw::Shader::OPCODE_MOV, result, &zero);\r
 974                                                 init->dst.index += i;\r
 975                                                 Instruction *mov = emitCast(result, arg0);\r
 976                                                 mov->dst.index += i;\r
 977                                                 mov->dst.mask = 1 << i;\r
 978                                                 ASSERT(mov->src[0].swizzle == 0x00);\r
 979                                         }\r
 980                                 }\r
 981                                 else if(arg0->isMatrix())\r
 982                                 {\r
 983                                         for(int i = 0; i < dim; i++)\r
 984                                         {\r
 985                                                 if(dim > dim2(arg0))\r
 986                                                 {\r
 987                                                         // Initialize to identity matrix\r
 988                                                         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
 989                                                         Instruction *mov = emitCast(result, &col);\r
 990                                                         mov->dst.index += i;\r
 991                                                 }\r
 992 \r
 993                                                 if(i < dim2(arg0))\r
 994                                                 {\r
 995                                                         Instruction *mov = emitCast(result, arg0);\r
 996                                                         mov->dst.index += i;\r
 997                                                         mov->dst.mask = 0xF >> (4 - dim2(arg0));\r
 998                                                         argument(mov->src[0], arg0, i);\r
 999                                                 }\r
1000                                         }\r
1001                                 }\r
1002                                 else\r
1003                                 {\r
1004                                         int column = 0;\r
1005                                         int row = 0;\r
1006 \r
1007                                         for(int i = 0; i < argumentCount; i++)\r
1008                                         {\r
1009                                                 TIntermTyped *argi = arg[i]->getAsTyped();\r
1010                                                 int size = argi->getNominalSize();\r
1011                                                 int element = 0;\r
1012 \r
1013                                                 while(element < size)\r
1014                                                 {\r
1015                                                         Instruction *mov = emitCast(result, argi);\r
1016                                                         mov->dst.index += column;\r
1017                                                         mov->dst.mask = (0xF << row) & 0xF;\r
1018                                                         mov->src[0].swizzle = (readSwizzle(argi, size) << (row * 2)) + 0x55 * element;\r
1019 \r
1020                                                         int end = row + size - element;\r
1021                                                         column = end >= dim ? column + 1 : column;\r
1022                                                         element = element + dim - row;\r
1023                                                         row = end >= dim ? 0 : end;\r
1024                                                 }\r
1025                                         }\r
1026                                 }\r
1027                         }\r
1028                         break;\r
1029                 case EOpConstructStruct:\r
1030                         if(visit == PostVisit)\r
1031                         {\r
1032                                 int offset = 0;\r
1033                                 for(int i = 0; i < argumentCount; i++)\r
1034                                 {\r
1035                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
1036                                         int size = argi->totalRegisterCount();\r
1037 \r
1038                                         for(int index = 0; index < size; index++)\r
1039                                         {\r
1040                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, argi);\r
1041                                                 mov->dst.index += index + offset;\r
1042                                                 mov->dst.mask = writeMask(result, offset + index);\r
1043                                                 argument(mov->src[0], argi, index);\r
1044                                         }\r
1045 \r
1046                                         offset += size;\r
1047                                 }\r
1048                         }\r
1049                         break;\r
1050                 case EOpLessThan:         if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, arg[0], arg[1]); break;\r
1051                 case EOpGreaterThan:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, arg[0], arg[1]); break;\r
1052                 case EOpLessThanEqual:    if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, arg[0], arg[1]); break;\r
1053                 case EOpGreaterThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, arg[0], arg[1]); break;\r
1054                 case EOpVectorEqual:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_EQ, result, arg[0], arg[1]); break;\r
1055                 case EOpVectorNotEqual:   if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_NE, result, arg[0], arg[1]); break;\r
1056                 case EOpMod:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MOD, result, arg[0], arg[1]); break;\r
1057                 case EOpPow:              if(visit == PostVisit) emit(sw::Shader::OPCODE_POW, result, arg[0], arg[1]); break;\r
1058                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN2, result, arg[0], arg[1]); break;\r
1059                 case EOpMin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MIN, result, arg[0], arg[1]); break;\r
1060                 case EOpMax:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]); break;\r
1061                 case EOpClamp:\r
1062                         if(visit == PostVisit)\r
1063                         {\r
1064                                 emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]);\r
1065                                 emit(sw::Shader::OPCODE_MIN, result, result, arg[2]);\r
1066                         }\r
1067                         break;\r
1068                 case EOpMix:         if(visit == PostVisit) emit(sw::Shader::OPCODE_LRP, result, arg[2], arg[1], arg[0]); break;\r
1069                 case EOpStep:        if(visit == PostVisit) emit(sw::Shader::OPCODE_STEP, result, arg[0], arg[1]); break;\r
1070                 case EOpSmoothStep:  if(visit == PostVisit) emit(sw::Shader::OPCODE_SMOOTH, result, arg[0], arg[1], arg[2]); break;\r
1071                 case EOpDistance:    if(visit == PostVisit) emit(sw::Shader::OPCODE_DIST(dim(arg[0])), result, arg[0], arg[1]); break;\r
1072                 case EOpDot:         if(visit == PostVisit) emit(sw::Shader::OPCODE_DP(dim(arg[0])), result, arg[0], arg[1]); break;\r
1073                 case EOpCross:       if(visit == PostVisit) emit(sw::Shader::OPCODE_CRS, result, arg[0], arg[1]); break;\r
1074                 case EOpFaceForward: if(visit == PostVisit) emit(sw::Shader::OPCODE_FORWARD(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1075                 case EOpReflect:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFLECT(dim(arg[0])), result, arg[0], arg[1]); break;\r
1076                 case EOpRefract:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFRACT(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1077                 case EOpMul:\r
1078                         if(visit == PostVisit)\r
1079                         {\r
1080                                 ASSERT(dim2(arg[0]) == dim2(arg[1]));\r
1081 \r
1082                                 for(int i = 0; i < dim2(arg[0]); i++)\r
1083                                 {\r
1084                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, arg[0], arg[1]);\r
1085                                         mul->dst.index += i;\r
1086                                         argument(mul->src[0], arg[0], i);\r
1087                                         argument(mul->src[1], arg[1], i);\r
1088                                 }\r
1089                         }\r
1090                         break;\r
1091                 case EOpOuterProduct:\r
1092                         if(visit == PostVisit)\r
1093                         {\r
1094                                 for(int i = 0; i < dim(arg[1]); i++)\r
1095                                 {\r
1096                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, arg[0], arg[1]);\r
1097                                         mul->dst.index += i;\r
1098                                         mul->src[1].swizzle = 0x55 * i;\r
1099                                 }\r
1100                         }\r
1101                         break;\r
1102                 default: UNREACHABLE(node->getOp());\r
1103                 }\r
1104 \r
1105                 return true;\r
1106         }\r
1107 \r
1108         bool OutputASM::visitSelection(Visit visit, TIntermSelection *node)\r
1109         {\r
1110                 if(currentScope != emitScope)\r
1111                 {\r
1112                         return false;\r
1113                 }\r
1114 \r
1115                 TIntermTyped *condition = node->getCondition();\r
1116                 TIntermNode *trueBlock = node->getTrueBlock();\r
1117                 TIntermNode *falseBlock = node->getFalseBlock();\r
1118                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
1119 \r
1120                 condition->traverse(this);\r
1121 \r
1122                 if(node->usesTernaryOperator())\r
1123                 {\r
1124                         if(constantCondition)\r
1125                         {\r
1126                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1127 \r
1128                                 if(trueCondition)\r
1129                                 {\r
1130                                         trueBlock->traverse(this);\r
1131                                         copy(node, trueBlock);\r
1132                                 }\r
1133                                 else\r
1134                                 {\r
1135                                         falseBlock->traverse(this);\r
1136                                         copy(node, falseBlock);\r
1137                                 }\r
1138                         }\r
1139                         else if(trivial(node, 6))   // Fast to compute both potential results and no side effects\r
1140                         {\r
1141                                 trueBlock->traverse(this);\r
1142                                 falseBlock->traverse(this);\r
1143                                 emit(sw::Shader::OPCODE_SELECT, node, condition, trueBlock, falseBlock);\r
1144                         }\r
1145                         else\r
1146                         {\r
1147                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1148 \r
1149                                 if(trueBlock)\r
1150                                 {\r
1151                                         trueBlock->traverse(this);\r
1152                                         copy(node, trueBlock);\r
1153                                 }\r
1154 \r
1155                                 if(falseBlock)\r
1156                                 {\r
1157                                         emit(sw::Shader::OPCODE_ELSE);\r
1158                                         falseBlock->traverse(this);\r
1159                                         copy(node, falseBlock);\r
1160                                 }\r
1161 \r
1162                                 emit(sw::Shader::OPCODE_ENDIF);\r
1163                         }\r
1164                 }\r
1165                 else  // if/else statement\r
1166                 {\r
1167                         if(constantCondition)\r
1168                         {\r
1169                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1170 \r
1171                                 if(trueCondition)\r
1172                                 {\r
1173                                         if(trueBlock)\r
1174                                         {\r
1175                                                 trueBlock->traverse(this);\r
1176                                         }\r
1177                                 }\r
1178                                 else\r
1179                                 {\r
1180                                         if(falseBlock)\r
1181                                         {\r
1182                                                 falseBlock->traverse(this);\r
1183                                         }\r
1184                                 }\r
1185                         }\r
1186                         else\r
1187                         {\r
1188                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1189 \r
1190                                 if(trueBlock)\r
1191                                 {\r
1192                                         trueBlock->traverse(this);\r
1193                                 }\r
1194 \r
1195                                 if(falseBlock)\r
1196                                 {\r
1197                                         emit(sw::Shader::OPCODE_ELSE);\r
1198                                         falseBlock->traverse(this);\r
1199                                 }\r
1200 \r
1201                                 emit(sw::Shader::OPCODE_ENDIF);\r
1202                         }\r
1203                 }\r
1204 \r
1205                 return false;\r
1206         }\r
1207 \r
1208         bool OutputASM::visitLoop(Visit visit, TIntermLoop *node)\r
1209         {\r
1210                 if(currentScope != emitScope)\r
1211                 {\r
1212                         return false;\r
1213                 }\r
1214 \r
1215                 unsigned int iterations = loopCount(node);\r
1216 \r
1217                 if(iterations == 0)\r
1218                 {\r
1219                         return false;\r
1220                 }\r
1221 \r
1222                 bool unroll = (iterations <= 4);\r
1223 \r
1224                 if(unroll)\r
1225                 {\r
1226                         DetectLoopDiscontinuity detectLoopDiscontinuity;\r
1227                         unroll = !detectLoopDiscontinuity.traverse(node);\r
1228                 }\r
1229 \r
1230                 TIntermNode *init = node->getInit();\r
1231                 TIntermTyped *condition = node->getCondition();\r
1232                 TIntermTyped *expression = node->getExpression();\r
1233                 TIntermNode *body = node->getBody();\r
1234 \r
1235                 if(node->getType() == ELoopDoWhile)\r
1236                 {\r
1237                         Temporary iterate(this);\r
1238                         Constant True(true);\r
1239                         emit(sw::Shader::OPCODE_MOV, &iterate, &True);\r
1240 \r
1241                         emit(sw::Shader::OPCODE_WHILE, 0, &iterate);   // FIXME: Implement real do-while\r
1242 \r
1243                         if(body)\r
1244                         {\r
1245                                 body->traverse(this);\r
1246                         }\r
1247 \r
1248                         emit(sw::Shader::OPCODE_TEST);\r
1249 \r
1250                         condition->traverse(this);\r
1251                         emit(sw::Shader::OPCODE_MOV, &iterate, condition);\r
1252 \r
1253                         emit(sw::Shader::OPCODE_ENDWHILE);\r
1254                 }\r
1255                 else\r
1256                 {\r
1257                         if(init)\r
1258                         {\r
1259                                 init->traverse(this);\r
1260                         }\r
1261 \r
1262                         if(unroll)\r
1263                         {\r
1264                                 for(unsigned int i = 0; i < iterations; i++)\r
1265                                 {\r
1266                                 //      condition->traverse(this);   // Condition could contain statements, but not in an unrollable loop\r
1267 \r
1268                                         if(body)\r
1269                                         {\r
1270                                                 body->traverse(this);\r
1271                                         }\r
1272 \r
1273                                         if(expression)\r
1274                                         {\r
1275                                                 expression->traverse(this);\r
1276                                         }\r
1277                                 }\r
1278                         }\r
1279                         else\r
1280                         {\r
1281                                 if(condition)\r
1282                                 {\r
1283                                         condition->traverse(this);\r
1284                                 }\r
1285 \r
1286                                 emit(sw::Shader::OPCODE_WHILE, 0, condition);\r
1287 \r
1288                                 if(body)\r
1289                                 {\r
1290                                         body->traverse(this);\r
1291                                 }\r
1292 \r
1293                                 emit(sw::Shader::OPCODE_TEST);\r
1294 \r
1295                                 if(expression)\r
1296                                 {\r
1297                                         expression->traverse(this);\r
1298                                 }\r
1299 \r
1300                                 if(condition)\r
1301                                 {\r
1302                                         condition->traverse(this);\r
1303                                 }\r
1304 \r
1305                                 emit(sw::Shader::OPCODE_ENDWHILE);\r
1306                         }\r
1307                 }\r
1308 \r
1309                 return false;\r
1310         }\r
1311 \r
1312         bool OutputASM::visitBranch(Visit visit, TIntermBranch *node)\r
1313         {\r
1314                 if(currentScope != emitScope)\r
1315                 {\r
1316                         return false;\r
1317                 }\r
1318 \r
1319                 switch(node->getFlowOp())\r
1320                 {\r
1321                 case EOpKill:      if(visit == PostVisit) emit(sw::Shader::OPCODE_DISCARD);  break;\r
1322                 case EOpBreak:     if(visit == PostVisit) emit(sw::Shader::OPCODE_BREAK);    break;\r
1323                 case EOpContinue:  if(visit == PostVisit) emit(sw::Shader::OPCODE_CONTINUE); break;\r
1324                 case EOpReturn:\r
1325                         if(visit == PostVisit)\r
1326                         {\r
1327                                 TIntermTyped *value = node->getExpression();\r
1328 \r
1329                                 if(value)\r
1330                                 {\r
1331                                         copy(functionArray[currentFunction].ret, value);\r
1332                                 }\r
1333 \r
1334                                 emit(sw::Shader::OPCODE_LEAVE);\r
1335                         }\r
1336                         break;\r
1337                 default: UNREACHABLE(node->getFlowOp());\r
1338                 }\r
1339 \r
1340                 return true;\r
1341         }\r
1342 \r
1343         bool OutputASM::isSamplerRegister(TIntermTyped *operand)\r
1344         {\r
1345                 return operand && isSamplerRegister(operand->getType());\r
1346         }\r
1347 \r
1348         bool OutputASM::isSamplerRegister(const TType &type)\r
1349         {\r
1350                 // A sampler register's qualifiers can be:\r
1351                 // - EvqUniform: The sampler uniform is used as is in the code (default case).\r
1352                 // - EvqTemporary: The sampler is indexed. It's still a sampler register.\r
1353                 // - EvqIn (and other similar types): The sampler has been passed as a function argument. At this point,\r
1354                 //                                    the sampler has been copied and is no longer a sampler register.\r
1355                 return IsSampler(type.getBasicType()) && (type.getQualifier() == EvqUniform || type.getQualifier() == EvqTemporary);\r
1356         }\r
1357 \r
1358         Instruction *OutputASM::emit(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2, int index)\r
1359         {\r
1360                 if(isSamplerRegister(dst))\r
1361                 {\r
1362                         op = sw::Shader::OPCODE_NULL;   // Can't assign to a sampler, but this is hit when indexing sampler arrays\r
1363                 }\r
1364 \r
1365                 Instruction *instruction = new Instruction(op);\r
1366 \r
1367                 if(dst)\r
1368                 {\r
1369                         instruction->dst.type = registerType(dst);\r
1370                         instruction->dst.index = registerIndex(dst) + index;\r
1371                         instruction->dst.mask = writeMask(dst);\r
1372                         instruction->dst.integer = (dst->getBasicType() == EbtInt);\r
1373                 }\r
1374 \r
1375                 argument(instruction->src[0], src0, index);\r
1376                 argument(instruction->src[1], src1, index);\r
1377                 argument(instruction->src[2], src2, index);\r
1378 \r
1379                 shader->append(instruction);\r
1380 \r
1381                 return instruction;\r
1382         }\r
1383 \r
1384         Instruction *OutputASM::emitCast(TIntermTyped *dst, TIntermTyped *src)\r
1385         {\r
1386                 // Integers are implemented as float\r
1387                 if((dst->getBasicType() == EbtFloat || dst->getBasicType() == EbtInt) && src->getBasicType() == EbtBool)\r
1388                 {\r
1389                         return emit(sw::Shader::OPCODE_B2F, dst, src);\r
1390                 }\r
1391                 if(dst->getBasicType() == EbtBool && (src->getBasicType() == EbtFloat || src->getBasicType() == EbtInt))\r
1392                 {\r
1393                         return emit(sw::Shader::OPCODE_F2B, dst, src);\r
1394                 }\r
1395                 if(dst->getBasicType() == EbtInt && src->getBasicType() == EbtFloat)\r
1396                 {\r
1397                         return emit(sw::Shader::OPCODE_TRUNC, dst, src);\r
1398                 }\r
1399 \r
1400                 return emit(sw::Shader::OPCODE_MOV, dst, src);\r
1401         }\r
1402 \r
1403         void OutputASM::emitBinary(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2)\r
1404         {\r
1405                 for(int index = 0; index < dst->elementRegisterCount(); index++)\r
1406                 {\r
1407                         emit(op, dst, src0, src1, src2, index);\r
1408                 }\r
1409         }\r
1410 \r
1411         void OutputASM::emitAssign(sw::Shader::Opcode op, TIntermTyped *result, TIntermTyped *lhs, TIntermTyped *src0, TIntermTyped *src1)\r
1412         {\r
1413                 emitBinary(op, result, src0, src1);\r
1414                 assignLvalue(lhs, result);\r
1415         }\r
1416 \r
1417         void OutputASM::emitCmp(sw::Shader::Control cmpOp, TIntermTyped *dst, TIntermNode *left, TIntermNode *right, int index)\r
1418         {\r
1419                 bool boolean = (left->getAsTyped()->getBasicType() == EbtBool);\r
1420                 sw::Shader::Opcode opcode = boolean ? sw::Shader::OPCODE_ICMP : sw::Shader::OPCODE_CMP;\r
1421 \r
1422                 Instruction *cmp = emit(opcode, dst, left, right);\r
1423                 cmp->control = cmpOp;\r
1424                 argument(cmp->src[0], left, index);\r
1425                 argument(cmp->src[1], right, index);\r
1426         }\r
1427 \r
1428         int componentCount(const TType &type, int registers)\r
1429         {\r
1430                 if(registers == 0)\r
1431                 {\r
1432                         return 0;\r
1433                 }\r
1434 \r
1435                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1436                 {\r
1437                         int index = registers / type.elementRegisterCount();\r
1438                         registers -= index * type.elementRegisterCount();\r
1439                         return index * type.getElementSize() + componentCount(type, registers);\r
1440                 }\r
1441 \r
1442                 if(type.isStruct() || type.isInterfaceBlock())\r
1443                 {\r
1444                         const TFieldList& fields = type.getStruct() ? type.getStruct()->fields() : type.getInterfaceBlock()->fields();\r
1445                         int elements = 0;\r
1446 \r
1447                         for(TFieldList::const_iterator field = fields.begin(); field != fields.end(); field++)\r
1448                         {\r
1449                                 const TType &fieldType = *((*field)->type());\r
1450 \r
1451                                 if(fieldType.totalRegisterCount() <= registers)\r
1452                                 {\r
1453                                         registers -= fieldType.totalRegisterCount();\r
1454                                         elements += fieldType.getObjectSize();\r
1455                                 }\r
1456                                 else   // Register within this field\r
1457                                 {\r
1458                                         return elements + componentCount(fieldType, registers);\r
1459                                 }\r
1460                         }\r
1461                 }\r
1462                 else if(type.isMatrix())\r
1463                 {\r
1464                         return registers * type.getSecondarySize();\r
1465                 }\r
1466                 \r
1467                 UNREACHABLE(0);\r
1468                 return 0;\r
1469         }\r
1470 \r
1471         int registerSize(const TType &type, int registers)\r
1472         {\r
1473                 if(registers == 0)\r
1474                 {\r
1475                         if(type.isStruct())\r
1476                         {\r
1477                                 return registerSize(*((*(type.getStruct()->fields().begin()))->type()), 0);\r
1478                         }\r
1479 \r
1480                         return type.isMatrix() ? type.getSecondarySize() : type.getNominalSize();\r
1481                 }\r
1482 \r
1483                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1484                 {\r
1485                         int index = registers / type.elementRegisterCount();\r
1486                         registers -= index * type.elementRegisterCount();\r
1487                         return registerSize(type, registers);\r
1488                 }\r
1489 \r
1490                 if(type.isStruct() || type.isInterfaceBlock())\r
1491                 {\r
1492                         const TFieldList& fields = type.getStruct() ? type.getStruct()->fields() : type.getInterfaceBlock()->fields();\r
1493                         int elements = 0;\r
1494 \r
1495                         for(TFieldList::const_iterator field = fields.begin(); field != fields.end(); field++)\r
1496                         {\r
1497                                 const TType &fieldType = *((*field)->type());\r
1498                                 \r
1499                                 if(fieldType.totalRegisterCount() <= registers)\r
1500                                 {\r
1501                                         registers -= fieldType.totalRegisterCount();\r
1502                                         elements += fieldType.getObjectSize();\r
1503                                 }\r
1504                                 else   // Register within this field\r
1505                                 {\r
1506                                         return registerSize(fieldType, registers);\r
1507                                 }\r
1508                         }\r
1509                 }\r
1510                 else if(type.isMatrix())\r
1511                 {\r
1512                         return registerSize(type, 0);\r
1513                 }\r
1514                 \r
1515                 UNREACHABLE(0);\r
1516                 return 0;\r
1517         }\r
1518 \r
1519         void OutputASM::argument(sw::Shader::SourceParameter &parameter, TIntermNode *argument, int index)\r
1520         {\r
1521                 if(argument)\r
1522                 {\r
1523                         TIntermTyped *arg = argument->getAsTyped();\r
1524                         const TType &type = arg->getType();\r
1525                         index = (index >= arg->totalRegisterCount()) ? arg->totalRegisterCount() - 1 : index;\r
1526 \r
1527                         int size = registerSize(type, index);\r
1528 \r
1529                         parameter.type = registerType(arg);\r
1530 \r
1531                         if(arg->getQualifier() == EvqConstExpr)\r
1532                         {\r
1533                                 int component = componentCount(type, index);\r
1534                                 ConstantUnion *constants = arg->getAsConstantUnion()->getUnionArrayPointer();\r
1535 \r
1536                                 for(int i = 0; i < 4; i++)\r
1537                                 {\r
1538                                         if(size == 1)   // Replicate\r
1539                                         {\r
1540                                                 parameter.value[i] = constants[component + 0].getAsFloat();\r
1541                                         }\r
1542                                         else if(i < size)\r
1543                                         {\r
1544                                                 parameter.value[i] = constants[component + i].getAsFloat();\r
1545                                         }\r
1546                                         else\r
1547                                         {\r
1548                                                 parameter.value[i] = 0.0f;\r
1549                                         }\r
1550                                 }\r
1551                         }\r
1552                         else\r
1553                         {\r
1554                                 parameter.index = registerIndex(arg) + index;\r
1555 \r
1556                                 if(isSamplerRegister(arg))\r
1557                                 {\r
1558                                         TIntermBinary *binary = argument->getAsBinaryNode();\r
1559 \r
1560                                         if(binary)\r
1561                                         {\r
1562                                                 TIntermTyped *left = binary->getLeft();\r
1563                                                 TIntermTyped *right = binary->getRight();\r
1564 \r
1565                                                 switch(binary->getOp())\r
1566                                                 {\r
1567                                                 case EOpIndexDirect:\r
1568                                                         parameter.index += right->getAsConstantUnion()->getIConst(0);\r
1569                                                         break;\r
1570                                                 case EOpIndexIndirect:\r
1571                                                         if(left->getArraySize() > 1)\r
1572                                                         {\r
1573                                                                 parameter.rel.type = registerType(binary->getRight());\r
1574                                                                 parameter.rel.index = registerIndex(binary->getRight());\r
1575                                                                 parameter.rel.scale = 1;\r
1576                                                                 parameter.rel.deterministic = true;\r
1577                                                         }\r
1578                                                         break;\r
1579                                                 case EOpIndexDirectStruct:\r
1580                                                 case EOpIndexDirectInterfaceBlock:\r
1581                                                         parameter.index += right->getAsConstantUnion()->getIConst(0);\r
1582                                                         break;\r
1583                                                 default:\r
1584                                                         UNREACHABLE(binary->getOp());\r
1585                                                 }\r
1586                                         }\r
1587                                 }\r
1588                         }\r
1589 \r
1590                         if(!IsSampler(arg->getBasicType()))\r
1591                         {\r
1592                                 parameter.swizzle = readSwizzle(arg, size);\r
1593                         }\r
1594                 }\r
1595         }\r
1596 \r
1597         void OutputASM::copy(TIntermTyped *dst, TIntermNode *src, int offset)\r
1598         {\r
1599                 for(int index = 0; index < dst->totalRegisterCount(); index++)\r
1600                 {\r
1601                         Instruction *mov = emit(sw::Shader::OPCODE_MOV, dst, src);\r
1602                         mov->dst.index += index;\r
1603                         mov->dst.mask = writeMask(dst, index);\r
1604                         argument(mov->src[0], src, offset + index);\r
1605                 }\r
1606         }\r
1607 \r
1608         int swizzleElement(int swizzle, int index)\r
1609         {\r
1610                 return (swizzle >> (index * 2)) & 0x03;\r
1611         }\r
1612 \r
1613         int swizzleSwizzle(int leftSwizzle, int rightSwizzle)\r
1614         {\r
1615                 return (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 0)) << 0) |\r
1616                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 1)) << 2) |\r
1617                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 2)) << 4) |\r
1618                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 3)) << 6);\r
1619         }\r
1620 \r
1621         void OutputASM::assignLvalue(TIntermTyped *dst, TIntermTyped *src)\r
1622         {\r
1623                 if(src &&\r
1624                         ((src->isVector() && (!dst->isVector() || (dst->getNominalSize() != dst->getNominalSize()))) ||\r
1625                          (src->isMatrix() && (!dst->isMatrix() || (src->getNominalSize() != dst->getNominalSize()) || (src->getSecondarySize() != dst->getSecondarySize())))))\r
1626                 {\r
1627                         return mContext.error(src->getLine(), "Result type should match the l-value type in compound assignment", src->isVector() ? "vector" : "matrix");\r
1628                 }\r
1629 \r
1630                 TIntermBinary *binary = dst->getAsBinaryNode();\r
1631 \r
1632                 if(binary && binary->getOp() == EOpIndexIndirect && dst->isScalar())\r
1633                 {\r
1634                         Instruction *insert = new Instruction(sw::Shader::OPCODE_INSERT);\r
1635                         \r
1636                         Temporary address(this);\r
1637                         lvalue(insert->dst, address, dst);\r
1638 \r
1639                         insert->src[0].type = insert->dst.type;\r
1640                         insert->src[0].index = insert->dst.index;\r
1641                         insert->src[0].rel = insert->dst.rel;\r
1642                         argument(insert->src[1], src);\r
1643                         argument(insert->src[2], binary->getRight());\r
1644 \r
1645                         shader->append(insert);\r
1646                 }\r
1647                 else\r
1648                 {\r
1649                         for(int offset = 0; offset < dst->totalRegisterCount(); offset++)\r
1650                         {\r
1651                                 Instruction *mov = new Instruction(sw::Shader::OPCODE_MOV);\r
1652                         \r
1653                                 Temporary address(this);\r
1654                                 int swizzle = lvalue(mov->dst, address, dst);\r
1655                                 mov->dst.index += offset;\r
1656 \r
1657                                 if(offset > 0)\r
1658                                 {\r
1659                                         mov->dst.mask = writeMask(dst, offset);\r
1660                                 }\r
1661 \r
1662                                 argument(mov->src[0], src, offset);\r
1663                                 mov->src[0].swizzle = swizzleSwizzle(mov->src[0].swizzle, swizzle);\r
1664 \r
1665                                 shader->append(mov);\r
1666                         }\r
1667                 }\r
1668         }\r
1669 \r
1670         int OutputASM::lvalue(sw::Shader::DestinationParameter &dst, Temporary &address, TIntermTyped *node)\r
1671         {\r
1672                 TIntermTyped *result = node;\r
1673                 TIntermBinary *binary = node->getAsBinaryNode();\r
1674                 TIntermSymbol *symbol = node->getAsSymbolNode();\r
1675 \r
1676                 if(binary)\r
1677                 {\r
1678                         TIntermTyped *left = binary->getLeft();\r
1679                         TIntermTyped *right = binary->getRight();\r
1680 \r
1681                         int leftSwizzle = lvalue(dst, address, left);   // Resolve the l-value of the left side\r
1682 \r
1683                         switch(binary->getOp())\r
1684                         {\r
1685                         case EOpIndexDirect:\r
1686                                 {\r
1687                                         int rightIndex = right->getAsConstantUnion()->getIConst(0);\r
1688 \r
1689                                         if(left->isRegister())\r
1690                                         {\r
1691                                                 int leftMask = dst.mask;\r
1692                                                 \r
1693                                                 dst.mask = 1;\r
1694                                                 while((leftMask & dst.mask) == 0)\r
1695                                                 {\r
1696                                                         dst.mask = dst.mask << 1;\r
1697                                                 }\r
1698 \r
1699                                                 int element = swizzleElement(leftSwizzle, rightIndex);\r
1700                                                 dst.mask = 1 << element;\r
1701                                                 \r
1702                                                 return element;\r
1703                                         }\r
1704                                         else if(left->isArray() || left->isMatrix())\r
1705                                         {\r
1706                                                 dst.index += rightIndex * result->totalRegisterCount();\r
1707                                                 return 0xE4;\r
1708                                         }\r
1709                                         else UNREACHABLE(0);\r
1710                                 }\r
1711                                 break;\r
1712                         case EOpIndexIndirect:\r
1713                                 {\r
1714                                         if(left->isRegister())\r
1715                                         {\r
1716                                                 // Requires INSERT instruction (handled by calling function)\r
1717                                         }\r
1718                                         else if(left->isArray() || left->isMatrix())\r
1719                                         {\r
1720                                                 int scale = result->totalRegisterCount();\r
1721 \r
1722                                                 if(dst.rel.type == sw::Shader::PARAMETER_VOID)   // Use the index register as the relative address directly\r
1723                                                 {\r
1724                                                         if(left->totalRegisterCount() > 1)\r
1725                                                         {\r
1726                                                                 sw::Shader::SourceParameter relativeRegister;\r
1727                                                                 argument(relativeRegister, right);\r
1728 \r
1729                                                                 dst.rel.index = relativeRegister.index;\r
1730                                                                 dst.rel.type = relativeRegister.type;\r
1731                                                                 dst.rel.scale = scale;\r
1732                                                                 dst.rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);\r
1733                                                         }\r
1734                                                 }\r
1735                                                 else if(dst.rel.index != registerIndex(&address))   // Move the previous index register to the address register\r
1736                                                 {\r
1737                                                         if(scale == 1)\r
1738                                                         {\r
1739                                                                 Constant oldScale((int)dst.rel.scale);\r
1740                                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, &address, &address, &oldScale, right);\r
1741                                                                 mad->src[0].index = dst.rel.index;\r
1742                                                                 mad->src[0].type = dst.rel.type;\r
1743                                                         }\r
1744                                                         else\r
1745                                                         {\r
1746                                                                 Constant oldScale((int)dst.rel.scale);\r
1747                                                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, &address, &address, &oldScale);\r
1748                                                                 mul->src[0].index = dst.rel.index;\r
1749                                                                 mul->src[0].type = dst.rel.type;\r
1750 \r
1751                                                                 Constant newScale(scale);\r
1752                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1753                                                         }\r
1754 \r
1755                                                         dst.rel.type = sw::Shader::PARAMETER_TEMP;\r
1756                                                         dst.rel.index = registerIndex(&address);\r
1757                                                         dst.rel.scale = 1;\r
1758                                                 }\r
1759                                                 else   // Just add the new index to the address register\r
1760                                                 {\r
1761                                                         if(scale == 1)\r
1762                                                         {\r
1763                                                                 emit(sw::Shader::OPCODE_ADD, &address, &address, right);\r
1764                                                         }\r
1765                                                         else\r
1766                                                         {\r
1767                                                                 Constant newScale(scale);\r
1768                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1769                                                         }\r
1770                                                 }\r
1771                                         }\r
1772                                         else UNREACHABLE(0);\r
1773                                 }\r
1774                                 break;\r
1775                         case EOpIndexDirectStruct:\r
1776                         case EOpIndexDirectInterfaceBlock:\r
1777                                 {\r
1778                                         const TFieldList& fields = (binary->getOp() == EOpIndexDirectStruct) ?\r
1779                                                                left->getType().getStruct()->fields() :\r
1780                                                                left->getType().getInterfaceBlock()->fields();\r
1781                                         int index = right->getAsConstantUnion()->getIConst(0);\r
1782                                         int fieldOffset = 0;\r
1783 \r
1784                                         for(int i = 0; i < index; i++)\r
1785                                         {\r
1786                                                 fieldOffset += fields[i]->type()->totalRegisterCount();\r
1787                                         }\r
1788 \r
1789                                         dst.type = registerType(left);\r
1790                                         dst.index += fieldOffset;\r
1791                                         dst.mask = writeMask(right);\r
1792 \r
1793                                         return 0xE4;\r
1794                                 }\r
1795                                 break;\r
1796                         case EOpVectorSwizzle:\r
1797                                 {\r
1798                                         ASSERT(left->isRegister());\r
1799 \r
1800                                         int leftMask = dst.mask;\r
1801 \r
1802                                         int swizzle = 0;\r
1803                                         int rightMask = 0;\r
1804 \r
1805                                         TIntermSequence &sequence = right->getAsAggregate()->getSequence();\r
1806 \r
1807                                         for(unsigned int i = 0; i < sequence.size(); i++)\r
1808                                         {\r
1809                                                 int index = sequence[i]->getAsConstantUnion()->getIConst(0);\r
1810 \r
1811                                                 int element = swizzleElement(leftSwizzle, index);\r
1812                                                 rightMask = rightMask | (1 << element);\r
1813                                                 swizzle = swizzle | swizzleElement(leftSwizzle, i) << (element * 2);\r
1814                                         }\r
1815                                         \r
1816                                         dst.mask = leftMask & rightMask;\r
1817 \r
1818                                         return swizzle;\r
1819                                 }\r
1820                                 break;\r
1821                         default:\r
1822                                 UNREACHABLE(binary->getOp());   // Not an l-value operator\r
1823                                 break;\r
1824                         }\r
1825                 }\r
1826                 else if(symbol)\r
1827                 {\r
1828                         dst.type = registerType(symbol);\r
1829                         dst.index = registerIndex(symbol);\r
1830                         dst.mask = writeMask(symbol);\r
1831                         return 0xE4;\r
1832                 }\r
1833 \r
1834                 return 0xE4;\r
1835         }\r
1836 \r
1837         sw::Shader::ParameterType OutputASM::registerType(TIntermTyped *operand)\r
1838         {\r
1839                 if(isSamplerRegister(operand))\r
1840                 {\r
1841                         return sw::Shader::PARAMETER_SAMPLER;\r
1842                 }\r
1843 \r
1844                 const TQualifier qualifier = operand->getQualifier();\r
1845                 if((EvqFragColor == qualifier) || (EvqFragData == qualifier))\r
1846                 {\r
1847                         if(((EvqFragData == qualifier) && (EvqFragColor == outputQualifier)) ||\r
1848                            ((EvqFragColor == qualifier) && (EvqFragData == outputQualifier)))\r
1849                         {\r
1850                                 mContext.error(operand->getLine(), "static assignment to both gl_FragData and gl_FragColor", "");\r
1851                         }\r
1852                         outputQualifier = qualifier;\r
1853                 }\r
1854 \r
1855                 switch(qualifier)\r
1856                 {\r
1857                 case EvqTemporary:           return sw::Shader::PARAMETER_TEMP;\r
1858                 case EvqGlobal:              return sw::Shader::PARAMETER_TEMP;\r
1859                 case EvqConstExpr:           return sw::Shader::PARAMETER_FLOAT4LITERAL;   // All converted to float\r
1860                 case EvqAttribute:           return sw::Shader::PARAMETER_INPUT;\r
1861                 case EvqVaryingIn:           return sw::Shader::PARAMETER_INPUT;\r
1862                 case EvqVaryingOut:          return sw::Shader::PARAMETER_OUTPUT;\r
1863                 case EvqVertexIn:            return sw::Shader::PARAMETER_INPUT;\r
1864                 case EvqFragmentOut:         return sw::Shader::PARAMETER_COLOROUT;\r
1865                 case EvqVertexOut:           return sw::Shader::PARAMETER_OUTPUT;\r
1866                 case EvqFragmentIn:          return sw::Shader::PARAMETER_INPUT;\r
1867                 case EvqInvariantVaryingIn:  return sw::Shader::PARAMETER_INPUT;    // FIXME: Guarantee invariance at the backend\r
1868                 case EvqInvariantVaryingOut: return sw::Shader::PARAMETER_OUTPUT;   // FIXME: Guarantee invariance at the backend \r
1869                 case EvqSmooth:              return sw::Shader::PARAMETER_OUTPUT;\r
1870                 case EvqFlat:                return sw::Shader::PARAMETER_OUTPUT;\r
1871                 case EvqCentroidOut:         return sw::Shader::PARAMETER_OUTPUT;\r
1872                 case EvqSmoothIn:            return sw::Shader::PARAMETER_INPUT;\r
1873                 case EvqFlatIn:              return sw::Shader::PARAMETER_INPUT;\r
1874                 case EvqCentroidIn:          return sw::Shader::PARAMETER_INPUT;\r
1875                 case EvqUniform:             return sw::Shader::PARAMETER_CONST;\r
1876                 case EvqIn:                  return sw::Shader::PARAMETER_TEMP;\r
1877                 case EvqOut:                 return sw::Shader::PARAMETER_TEMP;\r
1878                 case EvqInOut:               return sw::Shader::PARAMETER_TEMP;\r
1879                 case EvqConstReadOnly:       return sw::Shader::PARAMETER_TEMP;\r
1880                 case EvqPosition:            return sw::Shader::PARAMETER_OUTPUT;\r
1881                 case EvqPointSize:           return sw::Shader::PARAMETER_OUTPUT;\r
1882                 case EvqInstanceID:          return sw::Shader::PARAMETER_MISCTYPE;\r
1883                 case EvqFragCoord:           return sw::Shader::PARAMETER_MISCTYPE;\r
1884                 case EvqFrontFacing:         return sw::Shader::PARAMETER_MISCTYPE;\r
1885                 case EvqPointCoord:          return sw::Shader::PARAMETER_INPUT;\r
1886                 case EvqFragColor:           return sw::Shader::PARAMETER_COLOROUT;\r
1887                 case EvqFragData:            return sw::Shader::PARAMETER_COLOROUT;\r
1888                 default: UNREACHABLE(qualifier);\r
1889                 }\r
1890 \r
1891                 return sw::Shader::PARAMETER_VOID;\r
1892         }\r
1893 \r
1894         int OutputASM::registerIndex(TIntermTyped *operand)\r
1895         {\r
1896                 if(isSamplerRegister(operand))\r
1897                 {\r
1898                         return samplerRegister(operand);\r
1899                 }\r
1900 \r
1901                 switch(operand->getQualifier())\r
1902                 {\r
1903                 case EvqTemporary:           return temporaryRegister(operand);\r
1904                 case EvqGlobal:              return temporaryRegister(operand);\r
1905                 case EvqConstExpr:           UNREACHABLE(EvqConstExpr);\r
1906                 case EvqAttribute:           return attributeRegister(operand);\r
1907                 case EvqVaryingIn:           return varyingRegister(operand);\r
1908                 case EvqVaryingOut:          return varyingRegister(operand);\r
1909                 case EvqVertexIn:            return attributeRegister(operand);\r
1910                 case EvqFragmentOut:         return 0;\r
1911                 case EvqVertexOut:           return varyingRegister(operand);\r
1912                 case EvqFragmentIn:          return varyingRegister(operand);\r
1913                 case EvqInvariantVaryingIn:  return varyingRegister(operand);\r
1914                 case EvqInvariantVaryingOut: return varyingRegister(operand);\r
1915                 case EvqSmooth:              return varyingRegister(operand);\r
1916                 case EvqFlat:                return varyingRegister(operand);\r
1917                 case EvqCentroidOut:         return varyingRegister(operand);\r
1918                 case EvqSmoothIn:            return varyingRegister(operand);\r
1919                 case EvqFlatIn:              return varyingRegister(operand);\r
1920                 case EvqCentroidIn:          return varyingRegister(operand);\r
1921                 case EvqUniform:             return uniformRegister(operand);\r
1922                 case EvqIn:                  return temporaryRegister(operand);\r
1923                 case EvqOut:                 return temporaryRegister(operand);\r
1924                 case EvqInOut:               return temporaryRegister(operand);\r
1925                 case EvqConstReadOnly:       return temporaryRegister(operand);\r
1926                 case EvqPosition:            return varyingRegister(operand);\r
1927                 case EvqPointSize:           return varyingRegister(operand);\r
1928                 case EvqInstanceID:          vertexShader->instanceIdDeclared = true; return 0;\r
1929                 case EvqFragCoord:           pixelShader->vPosDeclared = true;  return 0;\r
1930                 case EvqFrontFacing:         pixelShader->vFaceDeclared = true; return 1;\r
1931                 case EvqPointCoord:          return varyingRegister(operand);\r
1932                 case EvqFragColor:           return 0;\r
1933                 case EvqFragData:            return 0;\r
1934                 default: UNREACHABLE(operand->getQualifier());\r
1935                 }\r
1936 \r
1937                 return 0;\r
1938         }\r
1939 \r
1940         int OutputASM::writeMask(TIntermTyped *destination, int index)\r
1941         {\r
1942                 if(destination->getQualifier() == EvqPointSize)\r
1943                 {\r
1944                         return 0x2;   // Point size stored in the y component\r
1945                 }\r
1946 \r
1947                 return 0xF >> (4 - registerSize(destination->getType(), index));\r
1948         }\r
1949 \r
1950         int OutputASM::readSwizzle(TIntermTyped *argument, int size)\r
1951         {\r
1952                 if(argument->getQualifier() == EvqPointSize)\r
1953                 {\r
1954                         return 0x55;   // Point size stored in the y component\r
1955                 }\r
1956 \r
1957                 static const unsigned char swizzleSize[5] = {0x00, 0x00, 0x54, 0xA4, 0xE4};   // (void), xxxx, xyyy, xyzz, xyzw\r
1958 \r
1959                 return swizzleSize[size];\r
1960         }\r
1961 \r
1962         // Conservatively checks whether an expression is fast to compute and has no side effects\r
1963         bool OutputASM::trivial(TIntermTyped *expression, int budget)\r
1964         {\r
1965                 if(!expression->isRegister())\r
1966                 {\r
1967                         return false;\r
1968                 }\r
1969 \r
1970                 return cost(expression, budget) >= 0;\r
1971         }\r
1972 \r
1973         // Returns the remaining computing budget (if < 0 the expression is too expensive or has side effects)\r
1974         int OutputASM::cost(TIntermNode *expression, int budget)\r
1975         {\r
1976                 if(budget < 0)\r
1977                 {\r
1978                         return budget;\r
1979                 }\r
1980 \r
1981                 if(expression->getAsSymbolNode())\r
1982                 {\r
1983                         return budget;\r
1984                 }\r
1985                 else if(expression->getAsConstantUnion())\r
1986                 {\r
1987                         return budget;\r
1988                 }\r
1989                 else if(expression->getAsBinaryNode())\r
1990                 {\r
1991                         TIntermBinary *binary = expression->getAsBinaryNode();\r
1992 \r
1993                         switch(binary->getOp())\r
1994                         {\r
1995                         case EOpVectorSwizzle:\r
1996                         case EOpIndexDirect:\r
1997                         case EOpIndexDirectStruct:\r
1998                         case EOpIndexDirectInterfaceBlock:\r
1999                                 return cost(binary->getLeft(), budget - 0);\r
2000                         case EOpAdd:\r
2001                         case EOpSub:\r
2002                         case EOpMul:\r
2003                                 return cost(binary->getLeft(), cost(binary->getRight(), budget - 1));\r
2004                         default:\r
2005                                 return -1;\r
2006                         }\r
2007                 }\r
2008                 else if(expression->getAsUnaryNode())\r
2009                 {\r
2010                         TIntermUnary *unary = expression->getAsUnaryNode();\r
2011 \r
2012                         switch(unary->getOp())\r
2013                         {\r
2014                         case EOpAbs:\r
2015                         case EOpNegative:\r
2016                                 return cost(unary->getOperand(), budget - 1);\r
2017                         default:\r
2018                                 return -1;\r
2019                         }\r
2020                 }\r
2021                 else if(expression->getAsSelectionNode())\r
2022                 {\r
2023                         TIntermSelection *selection = expression->getAsSelectionNode();\r
2024 \r
2025                         if(selection->usesTernaryOperator())\r
2026                         {\r
2027                                 TIntermTyped *condition = selection->getCondition();\r
2028                                 TIntermNode *trueBlock = selection->getTrueBlock();\r
2029                                 TIntermNode *falseBlock = selection->getFalseBlock();\r
2030                                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
2031 \r
2032                                 if(constantCondition)\r
2033                                 {\r
2034                                         bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
2035 \r
2036                                         if(trueCondition)\r
2037                                         {\r
2038                                                 return cost(trueBlock, budget - 0);\r
2039                                         }\r
2040                                         else\r
2041                                         {\r
2042                                                 return cost(falseBlock, budget - 0);\r
2043                                         }\r
2044                                 }\r
2045                                 else\r
2046                                 {\r
2047                                         return cost(trueBlock, cost(falseBlock, budget - 2));\r
2048                                 }\r
2049                         }\r
2050                 }\r
2051 \r
2052                 return -1;\r
2053         }\r
2054 \r
2055         const Function *OutputASM::findFunction(const TString &name)\r
2056         {\r
2057                 for(unsigned int f = 0; f < functionArray.size(); f++)\r
2058                 {\r
2059                         if(functionArray[f].name == name)\r
2060                         {\r
2061                                 return &functionArray[f];\r
2062                         }\r
2063                 }\r
2064 \r
2065                 return 0;\r
2066         }\r
2067         \r
2068         int OutputASM::temporaryRegister(TIntermTyped *temporary)\r
2069         {\r
2070                 return allocate(temporaries, temporary);\r
2071         }\r
2072 \r
2073         int OutputASM::varyingRegister(TIntermTyped *varying)\r
2074         {\r
2075                 int var = lookup(varyings, varying);\r
2076 \r
2077                 if(var == -1)\r
2078                 {\r
2079                         var = allocate(varyings, varying);\r
2080                         int componentCount = varying->getNominalSize();\r
2081                         int registerCount = varying->totalRegisterCount();\r
2082 \r
2083                         if(pixelShader)\r
2084                         {\r
2085                                 if((var + registerCount) > sw::PixelShader::MAX_INPUT_VARYINGS)\r
2086                                 {\r
2087                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "fragment shader");\r
2088                                         return 0;\r
2089                                 }\r
2090 \r
2091                                 if(varying->getQualifier() == EvqPointCoord)\r
2092                                 {\r
2093                                         ASSERT(varying->isRegister());\r
2094                                         if(componentCount >= 1) pixelShader->semantic[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2095                                         if(componentCount >= 2) pixelShader->semantic[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2096                                         if(componentCount >= 3) pixelShader->semantic[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2097                                         if(componentCount >= 4) pixelShader->semantic[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
2098                                 }\r
2099                                 else\r
2100                                 {\r
2101                                         for(int i = 0; i < varying->totalRegisterCount(); i++)\r
2102                                         {\r
2103                                                 if(componentCount >= 1) pixelShader->semantic[var + i][0] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2104                                                 if(componentCount >= 2) pixelShader->semantic[var + i][1] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2105                                                 if(componentCount >= 3) pixelShader->semantic[var + i][2] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2106                                                 if(componentCount >= 4) pixelShader->semantic[var + i][3] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
2107                                         }\r
2108                                 }\r
2109                         }\r
2110                         else if(vertexShader)\r
2111                         {\r
2112                                 if((var + registerCount) > sw::VertexShader::MAX_OUTPUT_VARYINGS)\r
2113                                 {\r
2114                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "vertex shader");\r
2115                                         return 0;\r
2116                                 }\r
2117 \r
2118                                 if(varying->getQualifier() == EvqPosition)\r
2119                                 {\r
2120                                         ASSERT(varying->isRegister());\r
2121                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2122                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2123                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2124                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2125                                         vertexShader->positionRegister = var;\r
2126                                 }\r
2127                                 else if(varying->getQualifier() == EvqPointSize)\r
2128                                 {\r
2129                                         ASSERT(varying->isRegister());\r
2130                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2131                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2132                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2133                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2134                                         vertexShader->pointSizeRegister = var;\r
2135                                 }\r
2136                                 else\r
2137                                 {\r
2138                                         // Semantic indexes for user varyings will be assigned during program link to match the pixel shader\r
2139                                 }\r
2140                         }\r
2141                         else UNREACHABLE(0);\r
2142 \r
2143                         declareVarying(varying, var);\r
2144                 }\r
2145 \r
2146                 return var;\r
2147         }\r
2148 \r
2149         void OutputASM::declareVarying(TIntermTyped *varying, int reg)\r
2150         {\r
2151                 if(varying->getQualifier() != EvqPointCoord)   // gl_PointCoord does not need linking\r
2152                 {\r
2153                         const TType &type = varying->getType();\r
2154                         const char *name = varying->getAsSymbolNode()->getSymbol().c_str();\r
2155                         VaryingList &activeVaryings = shaderObject->varyings;\r
2156                         \r
2157                         // Check if this varying has been declared before without having a register assigned\r
2158                         for(VaryingList::iterator v = activeVaryings.begin(); v != activeVaryings.end(); v++)\r
2159                         {\r
2160                                 if(v->name == name)\r
2161                                 {\r
2162                                         if(reg >= 0)\r
2163                                         {\r
2164                                                 ASSERT(v->reg < 0 || v->reg == reg);\r
2165                                                 v->reg = reg;\r
2166                                         }\r
2167 \r
2168                                         return;\r
2169                                 }\r
2170                         }\r
2171                         \r
2172                         activeVaryings.push_back(glsl::Varying(glVariableType(type), name, varying->getArraySize(), reg, 0));\r
2173                 }\r
2174         }\r
2175 \r
2176         int OutputASM::uniformRegister(TIntermTyped *uniform)\r
2177         {\r
2178                 const TType &type = uniform->getType();\r
2179                 ASSERT(!IsSampler(type.getBasicType()));\r
2180                 TInterfaceBlock *block = type.getAsInterfaceBlock();\r
2181                 TIntermSymbol *symbol = uniform->getAsSymbolNode();\r
2182                 ASSERT(symbol || block);\r
2183 \r
2184                 if(symbol || block)\r
2185                 {\r
2186                         int index = lookup(uniforms, uniform);\r
2187 \r
2188                         if(index == -1)\r
2189                         {\r
2190                                 index = allocate(uniforms, uniform);\r
2191                                 const TString &name = symbol ? symbol->getSymbol() : block->name();\r
2192 \r
2193                                 declareUniform(type, name, index);\r
2194                         }\r
2195 \r
2196                         return index;\r
2197                 }\r
2198 \r
2199                 return 0;\r
2200         }\r
2201 \r
2202         int OutputASM::attributeRegister(TIntermTyped *attribute)\r
2203         {\r
2204                 ASSERT(!attribute->isArray());\r
2205                 ASSERT(attribute->getBasicType() == EbtFloat);\r
2206 \r
2207                 int index = lookup(attributes, attribute);\r
2208 \r
2209                 if(index == -1)\r
2210                 {\r
2211                         TIntermSymbol *symbol = attribute->getAsSymbolNode();\r
2212                         ASSERT(symbol);\r
2213 \r
2214                         if(symbol)\r
2215                         {\r
2216                                 index = allocate(attributes, attribute);\r
2217                                 const TType &type = attribute->getType();\r
2218                                 int registerCount = attribute->totalRegisterCount();\r
2219 \r
2220                                 if(vertexShader && (index + registerCount) <= sw::VertexShader::MAX_INPUT_ATTRIBUTES)\r
2221                                 {\r
2222                                         for(int i = 0; i < registerCount; i++)\r
2223                                         {\r
2224                                                 vertexShader->input[index + i] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, index + i);\r
2225                                         }\r
2226                                 }\r
2227 \r
2228                                 ActiveAttributes &activeAttributes = shaderObject->activeAttributes;\r
2229 \r
2230                                 const char *name = symbol->getSymbol().c_str();\r
2231                                 activeAttributes.push_back(Attribute(glVariableType(type), name, 0, index));\r
2232                         }\r
2233                 }\r
2234 \r
2235                 return index;\r
2236         }\r
2237 \r
2238         int OutputASM::samplerRegister(TIntermTyped *sampler)\r
2239         {\r
2240                 ASSERT(IsSampler(sampler->getType().getBasicType()));\r
2241                 TIntermSymbol *symbol = sampler->getAsSymbolNode();\r
2242                 TIntermBinary *binary = sampler->getAsBinaryNode();\r
2243 \r
2244                 if(symbol)\r
2245                 {\r
2246                         return samplerRegister(symbol);\r
2247                 }\r
2248                 else if(binary)\r
2249                 {\r
2250                         ASSERT(binary->getOp() == EOpIndexDirect || binary->getOp() == EOpIndexIndirect ||\r
2251                                    binary->getOp() == EOpIndexDirectStruct || binary->getOp() == EOpIndexDirectInterfaceBlock);\r
2252 \r
2253                         return samplerRegister(binary->getLeft());   // Index added later\r
2254                 }\r
2255                 else UNREACHABLE(0);\r
2256 \r
2257                 return 0;\r
2258         }\r
2259 \r
2260         int OutputASM::samplerRegister(TIntermSymbol *sampler)\r
2261         {\r
2262                 const TType &type = sampler->getType();\r
2263                 ASSERT(IsSampler(type.getBasicType()) || type.getStruct());   // Structures can contain samplers\r
2264 \r
2265                 int index = lookup(samplers, sampler);\r
2266 \r
2267                 if(index == -1)\r
2268                 {\r
2269                         index = allocate(samplers, sampler);\r
2270 \r
2271                         if(sampler->getQualifier() == EvqUniform)\r
2272                         {\r
2273                                 const char *name = sampler->getSymbol().c_str();\r
2274                                 declareUniform(type, name, index);\r
2275                         }\r
2276                 }\r
2277 \r
2278                 return index;\r
2279         }\r
2280 \r
2281         int OutputASM::lookup(VariableArray &list, TIntermTyped *variable)\r
2282         {\r
2283                 for(unsigned int i = 0; i < list.size(); i++)\r
2284                 {\r
2285                         if(list[i] == variable)\r
2286                         {\r
2287                                 return i;   // Pointer match\r
2288                         }\r
2289                 }\r
2290 \r
2291                 TIntermSymbol *varSymbol = variable->getAsSymbolNode();\r
2292                 TInterfaceBlock *varBlock = variable->getType().getAsInterfaceBlock();\r
2293 \r
2294                 if(varSymbol)\r
2295                 {\r
2296                         for(unsigned int i = 0; i < list.size(); i++)\r
2297                         {\r
2298                                 if(list[i])\r
2299                                 {\r
2300                                         TIntermSymbol *listSymbol = list[i]->getAsSymbolNode();\r
2301 \r
2302                                         if(listSymbol)\r
2303                                         {\r
2304                                                 if(listSymbol->getId() == varSymbol->getId())\r
2305                                                 {\r
2306                                                         ASSERT(listSymbol->getSymbol() == varSymbol->getSymbol());\r
2307                                                         ASSERT(listSymbol->getType() == varSymbol->getType());\r
2308                                                         ASSERT(listSymbol->getQualifier() == varSymbol->getQualifier());\r
2309 \r
2310                                                         return i;\r
2311                                                 }\r
2312                                         }\r
2313                                 }\r
2314                         }\r
2315                 }\r
2316                 else if(varBlock)\r
2317                 {\r
2318                         for(unsigned int i = 0; i < list.size(); i++)\r
2319                         {\r
2320                                 if(list[i])\r
2321                                 {\r
2322                                         TInterfaceBlock *listBlock = list[i]->getType().getAsInterfaceBlock();\r
2323 \r
2324                                         if(listBlock)\r
2325                                         {\r
2326                                                 if(listBlock->name() == varBlock->name())\r
2327                                                 {\r
2328                                                         ASSERT(listBlock->arraySize() == varBlock->arraySize());\r
2329                                                         ASSERT(listBlock->fields() == varBlock->fields());\r
2330                                                         ASSERT(listBlock->blockStorage() == varBlock->blockStorage());\r
2331                                                         ASSERT(listBlock->matrixPacking() == varBlock->matrixPacking());\r
2332 \r
2333                                                         return i;\r
2334                                                 }\r
2335                                         }\r
2336                                 }\r
2337                         }\r
2338                 }\r
2339 \r
2340                 return -1;\r
2341         }\r
2342 \r
2343         int OutputASM::allocate(VariableArray &list, TIntermTyped *variable)\r
2344         {\r
2345                 int index = lookup(list, variable);\r
2346 \r
2347                 if(index == -1)\r
2348                 {\r
2349                         unsigned int registerCount = variable->totalRegisterCount();\r
2350 \r
2351                         for(unsigned int i = 0; i < list.size(); i++)\r
2352                         {\r
2353                                 if(list[i] == 0)\r
2354                                 {\r
2355                                         unsigned int j = 1;\r
2356                                         for( ; j < registerCount && (i + j) < list.size(); j++)\r
2357                                         {\r
2358                                                 if(list[i + j] != 0)\r
2359                                                 {\r
2360                                                         break;\r
2361                                                 }\r
2362                                         }\r
2363 \r
2364                                         if(j == registerCount)   // Found free slots\r
2365                                         {\r
2366                                                 for(unsigned int j = 0; j < registerCount; j++)\r
2367                                                 {\r
2368                                                         list[i + j] = variable;\r
2369                                                 }\r
2370 \r
2371                                                 return i;\r
2372                                         }\r
2373                                 }\r
2374                         }\r
2375 \r
2376                         index = list.size();\r
2377 \r
2378                         for(unsigned int i = 0; i < registerCount; i++)\r
2379                         {\r
2380                                 list.push_back(variable);\r
2381                         }\r
2382                 }\r
2383 \r
2384                 return index;\r
2385         }\r
2386 \r
2387         void OutputASM::free(VariableArray &list, TIntermTyped *variable)\r
2388         {\r
2389                 int index = lookup(list, variable);\r
2390 \r
2391                 if(index >= 0)\r
2392                 {\r
2393                         list[index] = 0;\r
2394                 }\r
2395         }\r
2396 \r
2397         void OutputASM::declareUniform(const TType &type, const TString &name, int index)\r
2398         {\r
2399                 const TStructure *structure = type.getStruct();\r
2400                 ActiveUniforms &activeUniforms = shaderObject->activeUniforms;\r
2401 \r
2402                 if(!structure)\r
2403                 {\r
2404                         activeUniforms.push_back(Uniform(glVariableType(type), glVariablePrecision(type), name.c_str(), type.getArraySize(), index));\r
2405 \r
2406                         if(isSamplerRegister(type))\r
2407                         {\r
2408                                 for(int i = 0; i < type.totalRegisterCount(); i++)\r
2409                                 {\r
2410                                         shader->declareSampler(index + i);\r
2411                                 }\r
2412                         }\r
2413                 }\r
2414                 else\r
2415                 {\r
2416                         const TFieldList& fields = structure->fields();\r
2417                         if(type.isArray())\r
2418                         {\r
2419                                 int elementIndex = index;\r
2420 \r
2421                                 for(int i = 0; i < type.getArraySize(); i++)\r
2422                                 {\r
2423                                         for(size_t j = 0; j < fields.size(); j++)\r
2424                                         {\r
2425                                                 const TType &fieldType = *(fields[j]->type());\r
2426                                                 const TString &fieldName = fields[j]->name();\r
2427 \r
2428                                                 const TString uniformName = name + "[" + str(i) + "]." + fieldName;\r
2429                                                 declareUniform(fieldType, uniformName, elementIndex);\r
2430                                                 elementIndex += fieldType.totalRegisterCount();\r
2431                                         }\r
2432                                 }\r
2433                         }\r
2434                         else\r
2435                         {\r
2436                                 int fieldIndex = index;\r
2437 \r
2438                                 for(size_t i = 0; i < fields.size(); i++)\r
2439                                 {\r
2440                                         const TType &fieldType = *(fields[i]->type());\r
2441                                         const TString &fieldName = fields[i]->name();\r
2442 \r
2443                                         const TString uniformName = name + "." + fieldName;\r
2444                                         declareUniform(fieldType, uniformName, fieldIndex);\r
2445                                         fieldIndex += fieldType.totalRegisterCount();\r
2446                                 }\r
2447                         }\r
2448                 }\r
2449         }\r
2450 \r
2451         GLenum OutputASM::glVariableType(const TType &type)\r
2452         {\r
2453                 switch(type.getBasicType())\r
2454                 {\r
2455                 case EbtFloat:\r
2456                         if(type.isScalar())\r
2457                         {\r
2458                                 return GL_FLOAT;\r
2459                         }\r
2460                         else if(type.isVector())\r
2461                         {\r
2462                                 switch(type.getNominalSize())\r
2463                                 {\r
2464                                 case 2: return GL_FLOAT_VEC2;\r
2465                                 case 3: return GL_FLOAT_VEC3;\r
2466                                 case 4: return GL_FLOAT_VEC4;\r
2467                                 default: UNREACHABLE(type.getNominalSize());\r
2468                                 }\r
2469                         }\r
2470                         else if(type.isMatrix())\r
2471                         {\r
2472                                 switch(type.getNominalSize())\r
2473                                 {\r
2474                                 case 2:\r
2475                                         switch(type.getSecondarySize())\r
2476                                         {\r
2477                                         case 2: return GL_FLOAT_MAT2;\r
2478                                         case 3: return GL_FLOAT_MAT2x3;\r
2479                                         case 4: return GL_FLOAT_MAT2x4;\r
2480                                         default: UNREACHABLE(type.getSecondarySize());\r
2481                                         }\r
2482                                 case 3:\r
2483                                         switch(type.getSecondarySize())\r
2484                                         {\r
2485                                         case 2: return GL_FLOAT_MAT3x2;\r
2486                                         case 3: return GL_FLOAT_MAT3;\r
2487                                         case 4: return GL_FLOAT_MAT3x4;\r
2488                                         default: UNREACHABLE(type.getSecondarySize());\r
2489                                         }\r
2490                                 case 4:\r
2491                                         switch(type.getSecondarySize())\r
2492                                         {\r
2493                                         case 2: return GL_FLOAT_MAT4x2;\r
2494                                         case 3: return GL_FLOAT_MAT4x3;\r
2495                                         case 4: return GL_FLOAT_MAT4;\r
2496                                         default: UNREACHABLE(type.getSecondarySize());\r
2497                                         }\r
2498                                 default: UNREACHABLE(type.getNominalSize());\r
2499                                 }\r
2500                         }\r
2501                         else UNREACHABLE(0);\r
2502                         break;\r
2503                 case EbtInt:\r
2504                         if(type.isScalar())\r
2505                         {\r
2506                                 return GL_INT;\r
2507                         }\r
2508                         else if(type.isVector())\r
2509                         {\r
2510                                 switch(type.getNominalSize())\r
2511                                 {\r
2512                                 case 2: return GL_INT_VEC2;\r
2513                                 case 3: return GL_INT_VEC3;\r
2514                                 case 4: return GL_INT_VEC4;\r
2515                                 default: UNREACHABLE(type.getNominalSize());\r
2516                                 }\r
2517                         }\r
2518                         else UNREACHABLE(0);\r
2519                         break;\r
2520                 case EbtUInt:\r
2521                         if(type.isScalar())\r
2522                         {\r
2523                                 return GL_UNSIGNED_INT;\r
2524                         }\r
2525                         else if(type.isVector())\r
2526                         {\r
2527                                 switch(type.getNominalSize())\r
2528                                 {\r
2529                                 case 2: return GL_UNSIGNED_INT_VEC2;\r
2530                                 case 3: return GL_UNSIGNED_INT_VEC3;\r
2531                                 case 4: return GL_UNSIGNED_INT_VEC4;\r
2532                                 default: UNREACHABLE(type.getNominalSize());\r
2533                                 }\r
2534                         }\r
2535                         else UNREACHABLE(0);\r
2536                         break;\r
2537                 case EbtBool:\r
2538                         if(type.isScalar())\r
2539                         {\r
2540                                 return GL_BOOL;\r
2541                         }\r
2542                         else if(type.isVector())\r
2543                         {\r
2544                                 switch(type.getNominalSize())\r
2545                                 {\r
2546                                 case 2: return GL_BOOL_VEC2;\r
2547                                 case 3: return GL_BOOL_VEC3;\r
2548                                 case 4: return GL_BOOL_VEC4;\r
2549                                 default: UNREACHABLE(type.getNominalSize());\r
2550                                 }\r
2551                         }\r
2552                         else UNREACHABLE(0);\r
2553                         break;\r
2554                 case EbtSampler2D:\r
2555                 case EbtISampler2D:\r
2556                 case EbtUSampler2D:\r
2557                         return GL_SAMPLER_2D;\r
2558                 case EbtSamplerCube:\r
2559                 case EbtISamplerCube:\r
2560                 case EbtUSamplerCube:\r
2561                         return GL_SAMPLER_CUBE;\r
2562                 case EbtSamplerExternalOES:\r
2563                         return GL_SAMPLER_EXTERNAL_OES;\r
2564                 case EbtSampler3D:\r
2565                 case EbtISampler3D:\r
2566                 case EbtUSampler3D:\r
2567                         return GL_SAMPLER_3D_OES;\r
2568                 case EbtSampler2DArray:\r
2569                 case EbtISampler2DArray:\r
2570                 case EbtUSampler2DArray:\r
2571                         return GL_SAMPLER_2D_ARRAY;\r
2572                 default:\r
2573                         UNREACHABLE(type.getBasicType());\r
2574                         break;\r
2575                 }\r
2576 \r
2577                 return GL_NONE;\r
2578         }\r
2579 \r
2580         GLenum OutputASM::glVariablePrecision(const TType &type)\r
2581         {\r
2582                 if(type.getBasicType() == EbtFloat)\r
2583                 {\r
2584                         switch(type.getPrecision())\r
2585                         {\r
2586                         case EbpHigh:   return GL_HIGH_FLOAT;\r
2587                         case EbpMedium: return GL_MEDIUM_FLOAT;\r
2588                         case EbpLow:    return GL_LOW_FLOAT;\r
2589                         case EbpUndefined:\r
2590                                 // Should be defined as the default precision by the parser\r
2591                         default: UNREACHABLE(type.getPrecision());\r
2592                         }\r
2593                 }\r
2594                 else if(type.getBasicType() == EbtInt)\r
2595                 {\r
2596                         switch(type.getPrecision())\r
2597                         {\r
2598                         case EbpHigh:   return GL_HIGH_INT;\r
2599                         case EbpMedium: return GL_MEDIUM_INT;\r
2600                         case EbpLow:    return GL_LOW_INT;\r
2601                         case EbpUndefined:\r
2602                                 // Should be defined as the default precision by the parser\r
2603                         default: UNREACHABLE(type.getPrecision());\r
2604                         }\r
2605                 }\r
2606 \r
2607                 // Other types (boolean, sampler) don't have a precision\r
2608                 return GL_NONE;\r
2609         }\r
2610 \r
2611         int OutputASM::dim(TIntermNode *v)\r
2612         {\r
2613                 TIntermTyped *vector = v->getAsTyped();\r
2614                 ASSERT(vector && vector->isRegister());\r
2615                 return vector->getNominalSize();\r
2616         }\r
2617 \r
2618         int OutputASM::dim2(TIntermNode *m)\r
2619         {\r
2620                 TIntermTyped *matrix = m->getAsTyped();\r
2621                 ASSERT(matrix && matrix->isMatrix() && !matrix->isArray());\r
2622                 return matrix->getSecondarySize();\r
2623         }\r
2624 \r
2625         // Returns ~0 if no loop count could be determined\r
2626         unsigned int OutputASM::loopCount(TIntermLoop *node)\r
2627         {\r
2628                 // Parse loops of the form:\r
2629                 // for(int index = initial; index [comparator] limit; index += increment)\r
2630                 TIntermSymbol *index = 0;\r
2631                 TOperator comparator = EOpNull;\r
2632                 int initial = 0;\r
2633                 int limit = 0;\r
2634                 int increment = 0;\r
2635 \r
2636                 // Parse index name and intial value\r
2637                 if(node->getInit())\r
2638                 {\r
2639                         TIntermAggregate *init = node->getInit()->getAsAggregate();\r
2640 \r
2641                         if(init)\r
2642                         {\r
2643                                 TIntermSequence &sequence = init->getSequence();\r
2644                                 TIntermTyped *variable = sequence[0]->getAsTyped();\r
2645 \r
2646                                 if(variable && variable->getQualifier() == EvqTemporary)\r
2647                                 {\r
2648                                         TIntermBinary *assign = variable->getAsBinaryNode();\r
2649 \r
2650                                         if(assign->getOp() == EOpInitialize)\r
2651                                         {\r
2652                                                 TIntermSymbol *symbol = assign->getLeft()->getAsSymbolNode();\r
2653                                                 TIntermConstantUnion *constant = assign->getRight()->getAsConstantUnion();\r
2654 \r
2655                                                 if(symbol && constant)\r
2656                                                 {\r
2657                                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2658                                                         {\r
2659                                                                 index = symbol;\r
2660                                                                 initial = constant->getUnionArrayPointer()[0].getIConst();\r
2661                                                         }\r
2662                                                 }\r
2663                                         }\r
2664                                 }\r
2665                         }\r
2666                 }\r
2667 \r
2668                 // Parse comparator and limit value\r
2669                 if(index && node->getCondition())\r
2670                 {\r
2671                         TIntermBinary *test = node->getCondition()->getAsBinaryNode();\r
2672 \r
2673                         if(test && test->getLeft()->getAsSymbolNode()->getId() == index->getId())\r
2674                         {\r
2675                                 TIntermConstantUnion *constant = test->getRight()->getAsConstantUnion();\r
2676 \r
2677                                 if(constant)\r
2678                                 {\r
2679                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2680                                         {\r
2681                                                 comparator = test->getOp();\r
2682                                                 limit = constant->getUnionArrayPointer()[0].getIConst();\r
2683                                         }\r
2684                                 }\r
2685                         }\r
2686                 }\r
2687 \r
2688                 // Parse increment\r
2689                 if(index && comparator != EOpNull && node->getExpression())\r
2690                 {\r
2691                         TIntermBinary *binaryTerminal = node->getExpression()->getAsBinaryNode();\r
2692                         TIntermUnary *unaryTerminal = node->getExpression()->getAsUnaryNode();\r
2693 \r
2694                         if(binaryTerminal)\r
2695                         {\r
2696                                 TOperator op = binaryTerminal->getOp();\r
2697                                 TIntermConstantUnion *constant = binaryTerminal->getRight()->getAsConstantUnion();\r
2698 \r
2699                                 if(constant)\r
2700                                 {\r
2701                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2702                                         {\r
2703                                                 int value = constant->getUnionArrayPointer()[0].getIConst();\r
2704 \r
2705                                                 switch(op)\r
2706                                                 {\r
2707                                                 case EOpAddAssign: increment = value;  break;\r
2708                                                 case EOpSubAssign: increment = -value; break;\r
2709                                                 default: UNIMPLEMENTED();\r
2710                                                 }\r
2711                                         }\r
2712                                 }\r
2713                         }\r
2714                         else if(unaryTerminal)\r
2715                         {\r
2716                                 TOperator op = unaryTerminal->getOp();\r
2717 \r
2718                                 switch(op)\r
2719                                 {\r
2720                                 case EOpPostIncrement: increment = 1;  break;\r
2721                                 case EOpPostDecrement: increment = -1; break;\r
2722                                 case EOpPreIncrement:  increment = 1;  break;\r
2723                                 case EOpPreDecrement:  increment = -1; break;\r
2724                                 default: UNIMPLEMENTED();\r
2725                                 }\r
2726                         }\r
2727                 }\r
2728 \r
2729                 if(index && comparator != EOpNull && increment != 0)\r
2730                 {\r
2731                         if(comparator == EOpLessThanEqual)\r
2732                         {\r
2733                                 comparator = EOpLessThan;\r
2734                                 limit += 1;\r
2735                         }\r
2736 \r
2737                         if(comparator == EOpLessThan)\r
2738                         {\r
2739                                 int iterations = (limit - initial) / increment;\r
2740 \r
2741                                 if(iterations <= 0)\r
2742                                 {\r
2743                                         iterations = 0;\r
2744                                 }\r
2745 \r
2746                                 return iterations;\r
2747                         }\r
2748                         else UNIMPLEMENTED();   // Falls through\r
2749                 }\r
2750 \r
2751                 return ~0;\r
2752         }\r
2753 \r
2754         bool DetectLoopDiscontinuity::traverse(TIntermNode *node)\r
2755         {\r
2756                 loopDepth = 0;\r
2757                 loopDiscontinuity = false;\r
2758                 \r
2759                 node->traverse(this);\r
2760                 \r
2761                 return loopDiscontinuity;\r
2762         }\r
2763 \r
2764         bool DetectLoopDiscontinuity::visitLoop(Visit visit, TIntermLoop *loop)\r
2765         {\r
2766                 if(visit == PreVisit)\r
2767                 {\r
2768                         loopDepth++;\r
2769                 }\r
2770                 else if(visit == PostVisit)\r
2771                 {\r
2772                         loopDepth++;\r
2773                 }\r
2774 \r
2775                 return true;\r
2776         }\r
2777 \r
2778         bool DetectLoopDiscontinuity::visitBranch(Visit visit, TIntermBranch *node)\r
2779         {\r
2780                 if(loopDiscontinuity)\r
2781                 {\r
2782                         return false;\r
2783                 }\r
2784 \r
2785                 if(!loopDepth)\r
2786                 {\r
2787                         return true;\r
2788                 }\r
2789         \r
2790                 switch(node->getFlowOp())\r
2791                 {\r
2792                 case EOpKill:\r
2793                         break;\r
2794                 case EOpBreak:\r
2795                 case EOpContinue:\r
2796                 case EOpReturn:\r
2797                         loopDiscontinuity = true;\r
2798                         break;\r
2799                 default: UNREACHABLE(node->getFlowOp());\r
2800                 }\r
2801 \r
2802                 return !loopDiscontinuity;\r
2803         }\r
2804 \r
2805         bool DetectLoopDiscontinuity::visitAggregate(Visit visit, TIntermAggregate *node)\r
2806         {\r
2807                 return !loopDiscontinuity;\r
2808         }\r
2809 }\r