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 "compiler/OutputASM.h"\r
  13 \r
  14 #include "common/debug.h"\r
  15 #include "compiler/InfoSink.h"\r
  16 \r
  17 #include "libGLESv2/Shader.h"\r
  18 \r
  19 #define GL_APICALL\r
  20 #include <GLES2/gl2.h>\r
  21 #include <GLES2/gl2ext.h>\r
  22 \r
  23 namespace sh\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, false, 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, EvqConst, 4, false, 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, EvqConst, 1, false, false))\r
  61                 {\r
  62                         constants[0].setBConst(b);\r
  63                 }\r
  64 \r
  65                 Constant(int i) : TIntermConstantUnion(constants, TType(EbtInt, EbpHigh, EvqConst, 1, false, 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         OutputASM::OutputASM(TParseContext &context, es2::Shader *shaderObject) : TIntermTraverser(true, true, true), mContext(context), shaderObject(shaderObject)\r
 103         {\r
 104                 shader = 0;\r
 105                 pixelShader = 0;\r
 106                 vertexShader = 0;\r
 107 \r
 108                 if(shaderObject)\r
 109                 {\r
 110                         shader = shaderObject->getShader();\r
 111                         pixelShader = shaderObject->getPixelShader();\r
 112                         vertexShader = shaderObject->getVertexShader();\r
 113                 }\r
 114 \r
 115                 functionArray.push_back(Function(0, "main(", 0, 0));\r
 116                 currentFunction = 0;\r
 117                 outputQualifier = EvqOutput; // Set outputQualifier to any value other than EvqFragColor or EvqFragData\r
 118         }\r
 119 \r
 120         OutputASM::~OutputASM()\r
 121         {\r
 122         }\r
 123 \r
 124         void OutputASM::output()\r
 125         {\r
 126                 if(shader)\r
 127                 {\r
 128                         emitShader(GLOBAL);\r
 129 \r
 130                         if(functionArray.size() > 1)   // Only call main() when there are other functions\r
 131                         {\r
 132                                 Instruction *callMain = emit(sw::Shader::OPCODE_CALL);\r
 133                                 callMain->dst.type = sw::Shader::PARAMETER_LABEL;\r
 134                                 callMain->dst.index = 0;   // main()\r
 135 \r
 136                                 emit(sw::Shader::OPCODE_RET);\r
 137                         }\r
 138 \r
 139                         emitShader(FUNCTION);\r
 140                 }\r
 141         }\r
 142 \r
 143         void OutputASM::emitShader(Scope scope)\r
 144         {\r
 145                 emitScope = scope;\r
 146                 currentScope = GLOBAL;\r
 147                 mContext.treeRoot->traverse(this);\r
 148         }\r
 149 \r
 150         void OutputASM::freeTemporary(Temporary *temporary)\r
 151         {\r
 152                 free(temporaries, temporary);\r
 153         }\r
 154 \r
 155         void OutputASM::visitSymbol(TIntermSymbol *symbol)\r
 156         {\r
 157                 if(symbol->getQualifier() == EvqVaryingOut || symbol->getQualifier() == EvqInvariantVaryingOut)\r
 158                 {\r
 159                         // Vertex varyings don't have to be actively used to successfully link\r
 160                         // against pixel shaders that use them. So make sure they're declared.\r
 161                         declareVarying(symbol, -1);\r
 162                 }\r
 163         }\r
 164 \r
 165         bool OutputASM::visitBinary(Visit visit, TIntermBinary *node)\r
 166         {\r
 167                 if(currentScope != emitScope)\r
 168                 {\r
 169                         return false;\r
 170                 }\r
 171 \r
 172                 TIntermTyped *result = node;\r
 173                 TIntermTyped *left = node->getLeft();\r
 174                 TIntermTyped *right = node->getRight();\r
 175                 const TType &leftType = left->getType();\r
 176                 const TType &rightType = right->getType();\r
 177                 const TType &resultType = node->getType();\r
 178                 \r
 179                 switch(node->getOp())\r
 180                 {\r
 181                 case EOpAssign:\r
 182                         if(visit == PostVisit)\r
 183                         {\r
 184                                 assignLvalue(left, right);\r
 185                                 copy(result, right);\r
 186                         }\r
 187                         break;\r
 188                 case EOpInitialize:\r
 189                         if(visit == PostVisit)\r
 190                         {\r
 191                                 copy(left, right);\r
 192                         }\r
 193                         break;\r
 194                 case EOpMatrixTimesScalarAssign:\r
 195                         if(visit == PostVisit)\r
 196                         {\r
 197                                 for(int i = 0; i < leftType.getNominalSize(); i++)\r
 198                                 {\r
 199                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 200                                         mul->dst.index += i;\r
 201                                         argument(mul->src[0], left, i);\r
 202                                 }\r
 203 \r
 204                                 assignLvalue(left, result);\r
 205                         }\r
 206                         break;\r
 207                 case EOpVectorTimesMatrixAssign:\r
 208                         if(visit == PostVisit)\r
 209                         {\r
 210                                 int size = leftType.getNominalSize();\r
 211 \r
 212                                 for(int i = 0; i < size; i++)\r
 213                                 {\r
 214                                         Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, left, right);\r
 215                                         dot->dst.mask = 1 << i;\r
 216                                         argument(dot->src[1], right, i);\r
 217                                 }\r
 218 \r
 219                                 assignLvalue(left, result);\r
 220                         }\r
 221                         break;\r
 222                 case EOpMatrixTimesMatrixAssign:\r
 223                         if(visit == PostVisit)\r
 224                         {\r
 225                                 int dim = leftType.getNominalSize();\r
 226 \r
 227                                 for(int i = 0; i < dim; i++)\r
 228                                 {\r
 229                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 230                                         mul->dst.index += i;\r
 231                                         argument(mul->src[1], right, i);\r
 232                                         mul->src[1].swizzle = 0x00;\r
 233 \r
 234                                         for(int j = 1; j < dim; j++)\r
 235                                         {\r
 236                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 237                                                 mad->dst.index += i;\r
 238                                                 argument(mad->src[0], left, j);\r
 239                                                 argument(mad->src[1], right, i);\r
 240                                                 mad->src[1].swizzle = j * 0x55;\r
 241                                                 argument(mad->src[2], result, i);\r
 242                                         }\r
 243                                 }\r
 244 \r
 245                                 assignLvalue(left, result);\r
 246                         }\r
 247                         break;\r
 248                 case EOpIndexDirect:\r
 249                         if(visit == PostVisit)\r
 250                         {\r
 251                                 int index = right->getAsConstantUnion()->getUnionArrayPointer()->getIConst();\r
 252 \r
 253                                 if(result->isMatrix() || result->isStruct())\r
 254                                 {\r
 255                                         ASSERT(left->isArray());\r
 256                                         copy(result, left, index * left->elementRegisterCount());\r
 257                                 }\r
 258                                 else if(result->isRegister())\r
 259                                 {\r
 260                                         Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 261 \r
 262                                         if(left->isRegister())\r
 263                                         {\r
 264                                                 mov->src[0].swizzle = index;\r
 265                                         }\r
 266                                         else if(left->isArray())\r
 267                                         {\r
 268                                                 argument(mov->src[0], left, index * left->elementRegisterCount());\r
 269                                         }\r
 270                                         else if(left->isMatrix())\r
 271                                         {\r
 272                                                 ASSERT(index < left->getNominalSize());   // FIXME: Report semantic error\r
 273                                                 argument(mov->src[0], left, index);\r
 274                                         }\r
 275                                         else UNREACHABLE();\r
 276                                 }\r
 277                                 else UNREACHABLE();\r
 278                         }\r
 279                         break;\r
 280                 case EOpIndexIndirect:\r
 281                         if(visit == PostVisit)\r
 282                         {\r
 283                                 if(left->isArray() || left->isMatrix())\r
 284                                 {\r
 285                                         for(int index = 0; index < result->totalRegisterCount(); index++)\r
 286                                         {\r
 287                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 288                                                 mov->dst.index += index;\r
 289                                                 mov->dst.mask = writeMask(result, index);\r
 290                                                 argument(mov->src[0], left, index);\r
 291 \r
 292                                                 if(left->totalRegisterCount() > 1)\r
 293                                                 {\r
 294                                                         sw::Shader::SourceParameter relativeRegister;\r
 295                                                         argument(relativeRegister, right);\r
 296 \r
 297                                                         mov->src[0].rel.type = relativeRegister.type;\r
 298                                                         mov->src[0].rel.index = relativeRegister.index;\r
 299                                                         mov->src[0].rel.scale = result->totalRegisterCount();\r
 300                                                         mov->src[0].rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);\r
 301                                                 }\r
 302                                         }\r
 303                                 }\r
 304                                 else if(left->isRegister())\r
 305                                 {\r
 306                                         emit(sw::Shader::OPCODE_EXTRACT, result, left, right);\r
 307                                 }\r
 308                                 else UNREACHABLE();\r
 309                         }\r
 310                         break;\r
 311                 case EOpIndexDirectStruct:\r
 312                         if(visit == PostVisit)\r
 313                         {\r
 314                                 ASSERT(leftType.isStruct());\r
 315 \r
 316                                 const TTypeList *structure = leftType.getStruct();\r
 317                                 const TString &fieldName = rightType.getFieldName();\r
 318                                 int fieldOffset = 0;\r
 319 \r
 320                                 for(size_t i = 0; i < structure->size(); i++)\r
 321                                 {\r
 322                                         const TType &fieldType = *(*structure)[i].type;\r
 323 \r
 324                                         if(fieldType.getFieldName() == fieldName)\r
 325                                         {\r
 326                                                 break;\r
 327                                         }\r
 328 \r
 329                                         fieldOffset += fieldType.totalRegisterCount();\r
 330                                 }\r
 331 \r
 332                                 copy(result, left, fieldOffset);\r
 333                         }\r
 334                         break;\r
 335                 case EOpVectorSwizzle:\r
 336                         if(visit == PostVisit)\r
 337                         {\r
 338                                 int swizzle = 0;\r
 339                                 TIntermAggregate *components = right->getAsAggregate();\r
 340 \r
 341                                 if(components)\r
 342                                 {\r
 343                                         TIntermSequence &sequence = components->getSequence();\r
 344                                         int component = 0;\r
 345 \r
 346                                         for(TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); sit++)\r
 347                                         {\r
 348                                                 TIntermConstantUnion *element = (*sit)->getAsConstantUnion();\r
 349 \r
 350                                                 if(element)\r
 351                                                 {\r
 352                                                         int i = element->getUnionArrayPointer()[0].getIConst();\r
 353                                                         swizzle |= i << (component * 2);\r
 354                                                         component++;\r
 355                                                 }\r
 356                                                 else UNREACHABLE();\r
 357                                         }\r
 358                                 }\r
 359                                 else UNREACHABLE();\r
 360 \r
 361                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, left);\r
 362                                 mov->src[0].swizzle = swizzle;\r
 363                         }\r
 364                         break;\r
 365                 case EOpAddAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_ADD, result, left, left, right); break;\r
 366                 case EOpAdd:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_ADD, result, left, right);       break;\r
 367                 case EOpSubAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_SUB, result, left, left, right); break;\r
 368                 case EOpSub:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_SUB, result, left, right);       break;\r
 369                 case EOpMulAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 370                 case EOpMul:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_MUL, result, left, right);       break;\r
 371                 case EOpDivAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_DIV, result, left, left, right); break;\r
 372                 case EOpDiv:       if(visit == PostVisit) emitBinary(sw::Shader::OPCODE_DIV, result, left, right);       break;\r
 373                 case EOpEqual:\r
 374                         if(visit == PostVisit)\r
 375                         {\r
 376                                 emitCmp(sw::Shader::CONTROL_EQ, result, left, right);\r
 377 \r
 378                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 379                                 {\r
 380                                         Temporary equal(this);\r
 381                                         emitCmp(sw::Shader::CONTROL_EQ, &equal, left, right, index);\r
 382                                         emit(sw::Shader::OPCODE_AND, result, result, &equal);\r
 383                                 }\r
 384                         }\r
 385                         break;\r
 386                 case EOpNotEqual:\r
 387                         if(visit == PostVisit)\r
 388                         {\r
 389                                 emitCmp(sw::Shader::CONTROL_NE, result, left, right);\r
 390 \r
 391                                 for(int index = 1; index < left->totalRegisterCount(); index++)\r
 392                                 {\r
 393                                         Temporary notEqual(this);\r
 394                                         emitCmp(sw::Shader::CONTROL_NE, &notEqual, left, right, index);\r
 395                                         emit(sw::Shader::OPCODE_OR, result, result, &notEqual);\r
 396                                 }\r
 397                         }\r
 398                         break;\r
 399                 case EOpLessThan:                if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, left, right); break;\r
 400                 case EOpGreaterThan:             if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, left, right); break;\r
 401                 case EOpLessThanEqual:           if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, left, right); break;\r
 402                 case EOpGreaterThanEqual:        if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, left, right); break;\r
 403                 case EOpVectorTimesScalarAssign: if(visit == PostVisit) emitAssign(sw::Shader::OPCODE_MUL, result, left, left, right); break;\r
 404                 case EOpVectorTimesScalar:       if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, left, right); break;\r
 405                 case EOpMatrixTimesScalar:\r
 406                         if(visit == PostVisit)\r
 407                         {\r
 408                                 for(int i = 0; i < leftType.getNominalSize(); i++)\r
 409                                 {\r
 410                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 411                                         mul->dst.index += i;\r
 412                                         argument(mul->src[0], left, i);\r
 413                                 }\r
 414                         }\r
 415                         break;\r
 416                 case EOpVectorTimesMatrix:\r
 417                         if(visit == PostVisit)\r
 418                         {\r
 419                                 int size = leftType.getNominalSize();\r
 420 \r
 421                                 for(int i = 0; i < size; i++)\r
 422                                 {\r
 423                                         Instruction *dot = emit(sw::Shader::OPCODE_DP(size), result, left, right);\r
 424                                         dot->dst.mask = 1 << i;\r
 425                                         argument(dot->src[1], right, i);\r
 426                                 }\r
 427                         }\r
 428                         break;\r
 429                 case EOpMatrixTimesVector:\r
 430                         if(visit == PostVisit)\r
 431                         {\r
 432                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 433                                 mul->src[1].swizzle = 0x00;\r
 434 \r
 435                                 for(int i = 1; i < leftType.getNominalSize(); i++)\r
 436                                 {\r
 437                                         Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 438                                         argument(mad->src[0], left, i);\r
 439                                         mad->src[1].swizzle = i * 0x55;\r
 440                                 }\r
 441                         }\r
 442                         break;\r
 443                 case EOpMatrixTimesMatrix:\r
 444                         if(visit == PostVisit)\r
 445                         {\r
 446                                 int dim = leftType.getNominalSize();\r
 447 \r
 448                                 for(int i = 0; i < dim; i++)\r
 449                                 {\r
 450                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, left, right);\r
 451                                         mul->dst.index += i;\r
 452                                         argument(mul->src[1], right, i);\r
 453                                         mul->src[1].swizzle = 0x00;\r
 454 \r
 455                                         for(int j = 1; j < dim; j++)\r
 456                                         {\r
 457                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, result, left, right, result);\r
 458                                                 mad->dst.index += i;\r
 459                                                 argument(mad->src[0], left, j);\r
 460                                                 argument(mad->src[1], right, i);\r
 461                                                 mad->src[1].swizzle = j * 0x55;\r
 462                                                 argument(mad->src[2], result, i);\r
 463                                         }\r
 464                                 }\r
 465                         }\r
 466                         break;\r
 467                 case EOpLogicalOr:\r
 468                         if(trivial(right, 6))\r
 469                         {\r
 470                                 if(visit == PostVisit)\r
 471                                 {\r
 472                                         emit(sw::Shader::OPCODE_OR, result, left, right);\r
 473                                 }\r
 474                         }\r
 475                         else   // Short-circuit evaluation\r
 476                         {\r
 477                                 if(visit == InVisit)\r
 478                                 {\r
 479                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 480                                         Instruction *ifnot = emit(sw::Shader::OPCODE_IF, 0, result);\r
 481                                         ifnot->src[0].modifier = sw::Shader::MODIFIER_NOT;\r
 482                                 }\r
 483                                 else if(visit == PostVisit)\r
 484                                 {\r
 485                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 486                                         emit(sw::Shader::OPCODE_ENDIF);\r
 487                                 }\r
 488                         }\r
 489                         break;\r
 490                 case EOpLogicalXor:        if(visit == PostVisit) emit(sw::Shader::OPCODE_XOR, result, left, right); break;\r
 491                 case EOpLogicalAnd:\r
 492                         if(trivial(right, 6))\r
 493                         {\r
 494                                 if(visit == PostVisit)\r
 495                                 {\r
 496                                         emit(sw::Shader::OPCODE_AND, result, left, right);\r
 497                                 }\r
 498                         }\r
 499                         else   // Short-circuit evaluation\r
 500                         {\r
 501                                 if(visit == InVisit)\r
 502                                 {\r
 503                                         emit(sw::Shader::OPCODE_MOV, result, left);\r
 504                                         emit(sw::Shader::OPCODE_IF, 0, result);\r
 505                                 }\r
 506                                 else if(visit == PostVisit)\r
 507                                 {\r
 508                                         emit(sw::Shader::OPCODE_MOV, result, right);\r
 509                                         emit(sw::Shader::OPCODE_ENDIF);\r
 510                                 }\r
 511                         }\r
 512                         break;\r
 513                 default: UNREACHABLE();\r
 514                 }\r
 515 \r
 516                 return true;\r
 517         }\r
 518 \r
 519         bool OutputASM::visitUnary(Visit visit, TIntermUnary *node)\r
 520         {\r
 521                 if(currentScope != emitScope)\r
 522                 {\r
 523                         return false;\r
 524                 }\r
 525 \r
 526                 Constant one(1.0f, 1.0f, 1.0f, 1.0f);\r
 527                 Constant rad(1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f, 1.74532925e-2f);\r
 528                 Constant deg(5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f, 5.72957795e+1f);\r
 529 \r
 530                 TIntermTyped *result = node;\r
 531                 TIntermTyped *arg = node->getOperand();\r
 532 \r
 533                 switch(node->getOp())\r
 534                 {\r
 535                 case EOpNegative:\r
 536                         if(visit == PostVisit)\r
 537                         {\r
 538                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 539                                 {\r
 540                                         Instruction *neg = emit(sw::Shader::OPCODE_MOV, result, arg);\r
 541                                         neg->dst.index += index;\r
 542                                         argument(neg->src[0], arg, index);\r
 543                                         neg->src[0].modifier = sw::Shader::MODIFIER_NEGATE;\r
 544                                 }\r
 545                         }\r
 546                         break;\r
 547                 case EOpVectorLogicalNot: if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 548                 case EOpLogicalNot:       if(visit == PostVisit) emit(sw::Shader::OPCODE_NOT, result, arg); break;\r
 549                 case EOpPostIncrement:\r
 550                         if(visit == PostVisit)\r
 551                         {\r
 552                                 copy(result, arg);\r
 553 \r
 554                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 555                                 {\r
 556                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, arg, arg, &one);\r
 557                                         add->dst.index += index;\r
 558                                         argument(add->src[0], arg, index);\r
 559                                 }\r
 560 \r
 561                                 assignLvalue(arg, arg);\r
 562                         }\r
 563                         break;\r
 564                 case EOpPostDecrement:\r
 565                         if(visit == PostVisit)\r
 566                         {\r
 567                                 copy(result, arg);\r
 568 \r
 569                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 570                                 {\r
 571                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, arg, arg, &one);\r
 572                                         sub->dst.index += index;\r
 573                                         argument(sub->src[0], arg, index);\r
 574                                 }\r
 575 \r
 576                                 assignLvalue(arg, arg);\r
 577                         }\r
 578                         break;\r
 579                 case EOpPreIncrement:\r
 580                         if(visit == PostVisit)\r
 581                         {\r
 582                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 583                                 {\r
 584                                         Instruction *add = emit(sw::Shader::OPCODE_ADD, result, arg, &one);\r
 585                                         add->dst.index += index;\r
 586                                         argument(add->src[0], arg, index);\r
 587                                 }\r
 588 \r
 589                                 assignLvalue(arg, result);\r
 590                         }\r
 591                         break;\r
 592                 case EOpPreDecrement:\r
 593                         if(visit == PostVisit)\r
 594                         {\r
 595                                 for(int index = 0; index < arg->totalRegisterCount(); index++)\r
 596                                 {\r
 597                                         Instruction *sub = emit(sw::Shader::OPCODE_SUB, result, arg, &one);\r
 598                                         sub->dst.index += index;\r
 599                                         argument(sub->src[0], arg, index);\r
 600                                 }\r
 601 \r
 602                                 assignLvalue(arg, result);\r
 603                         }\r
 604                         break;\r
 605                 case EOpRadians:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &rad); break;\r
 606                 case EOpDegrees:          if(visit == PostVisit) emit(sw::Shader::OPCODE_MUL, result, arg, &deg); break;\r
 607                 case EOpSin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_SIN, result, arg); break;\r
 608                 case EOpCos:              if(visit == PostVisit) emit(sw::Shader::OPCODE_COS, result, arg); break;\r
 609                 case EOpTan:              if(visit == PostVisit) emit(sw::Shader::OPCODE_TAN, result, arg); break;\r
 610                 case EOpAsin:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ASIN, result, arg); break;\r
 611                 case EOpAcos:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ACOS, result, arg); break;\r
 612                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN, result, arg); break;\r
 613                 case EOpExp:              if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP, result, arg); break;\r
 614                 case EOpLog:              if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG, result, arg); break;\r
 615                 case EOpExp2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_EXP2, result, arg); break;\r
 616                 case EOpLog2:             if(visit == PostVisit) emit(sw::Shader::OPCODE_LOG2, result, arg); break;\r
 617                 case EOpSqrt:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SQRT, result, arg); break;\r
 618                 case EOpInverseSqrt:      if(visit == PostVisit) emit(sw::Shader::OPCODE_RSQ, result, arg); break;\r
 619                 case EOpAbs:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ABS, result, arg); break;\r
 620                 case EOpSign:             if(visit == PostVisit) emit(sw::Shader::OPCODE_SGN, result, arg); break;\r
 621                 case EOpFloor:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FLOOR, result, arg); break;\r
 622                 case EOpCeil:             if(visit == PostVisit) emit(sw::Shader::OPCODE_CEIL, result, arg, result); break;\r
 623                 case EOpFract:            if(visit == PostVisit) emit(sw::Shader::OPCODE_FRC, result, arg); break;\r
 624                 case EOpLength:           if(visit == PostVisit) emit(sw::Shader::OPCODE_LEN(dim(arg)), result, arg); break;\r
 625                 case EOpNormalize:        if(visit == PostVisit) emit(sw::Shader::OPCODE_NRM(dim(arg)), result, arg); break;\r
 626                 case EOpDFdx:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDX, result, arg); break;\r
 627                 case EOpDFdy:             if(visit == PostVisit) emit(sw::Shader::OPCODE_DFDY, result, arg); break;\r
 628                 case EOpFwidth:           if(visit == PostVisit) emit(sw::Shader::OPCODE_FWIDTH, result, arg); break;\r
 629                 case EOpAny:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ANY, result, arg); break;\r
 630                 case EOpAll:              if(visit == PostVisit) emit(sw::Shader::OPCODE_ALL, result, arg); break;\r
 631                 default: UNREACHABLE();\r
 632                 }\r
 633 \r
 634                 return true;\r
 635         }\r
 636 \r
 637         bool OutputASM::visitAggregate(Visit visit, TIntermAggregate *node)\r
 638         {\r
 639                 if(currentScope != emitScope && node->getOp() != EOpFunction && node->getOp() != EOpSequence)\r
 640                 {\r
 641                         return false;\r
 642                 }\r
 643 \r
 644                 Constant zero(0.0f, 0.0f, 0.0f, 0.0f);\r
 645 \r
 646                 TIntermTyped *result = node;\r
 647                 const TType &resultType = node->getType();\r
 648                 TIntermSequence &arg = node->getSequence();\r
 649                 int argumentCount = arg.size();\r
 650 \r
 651                 switch(node->getOp())\r
 652                 {\r
 653                 case EOpSequence:           break;\r
 654                 case EOpDeclaration:        break;\r
 655                 case EOpPrototype:          break;\r
 656                 case EOpComma:\r
 657                         if(visit == PostVisit)\r
 658                         {\r
 659                                 copy(result, arg[1]);\r
 660                         }\r
 661                         break;\r
 662                 case EOpFunction:\r
 663                         if(visit == PreVisit)\r
 664                         {\r
 665                                 const TString &name = node->getName();\r
 666 \r
 667                                 if(emitScope == FUNCTION)\r
 668                                 {\r
 669                                         if(functionArray.size() > 1)   // No need for a label when there's only main()\r
 670                                         {\r
 671                                                 Instruction *label = emit(sw::Shader::OPCODE_LABEL);\r
 672                                                 label->dst.type = sw::Shader::PARAMETER_LABEL;\r
 673 \r
 674                                                 const Function *function = findFunction(name);\r
 675                                                 ASSERT(function);   // Should have been added during global pass\r
 676                                                 label->dst.index = function->label;\r
 677                                                 currentFunction = function->label;\r
 678                                         }\r
 679                                 }\r
 680                                 else if(emitScope == GLOBAL)\r
 681                                 {\r
 682                                         if(name != "main(")\r
 683                                         {\r
 684                                                 TIntermSequence &arguments = node->getSequence()[0]->getAsAggregate()->getSequence();\r
 685                                                 functionArray.push_back(Function(functionArray.size(), name, &arguments, node));\r
 686                                         }\r
 687                                 }\r
 688                                 else UNREACHABLE();\r
 689 \r
 690                                 currentScope = FUNCTION;\r
 691                         }\r
 692                         else if(visit == PostVisit)\r
 693                         {\r
 694                                 if(emitScope == FUNCTION)\r
 695                                 {\r
 696                                         if(functionArray.size() > 1)   // No need to return when there's only main()\r
 697                                         {\r
 698                                                 emit(sw::Shader::OPCODE_RET);\r
 699                                         }\r
 700                                 }\r
 701 \r
 702                                 currentScope = GLOBAL;\r
 703                         }\r
 704                         break;\r
 705                 case EOpFunctionCall:\r
 706                         if(visit == PostVisit)\r
 707                         {\r
 708                                 if(node->isUserDefined())\r
 709                                 {\r
 710                                         const TString &name = node->getName();\r
 711                                         const Function *function = findFunction(name);\r
 712 \r
 713                                         if(!function)\r
 714                                         {\r
 715                                                 mContext.error(node->getLine(), "function definition not found", name.c_str());\r
 716                                                 return false;\r
 717                                         }\r
 718 \r
 719                                         TIntermSequence &arguments = *function->arg;\r
 720 \r
 721                                         for(int i = 0; i < argumentCount; i++)\r
 722                                         {\r
 723                                                 TIntermTyped *in = arguments[i]->getAsTyped();\r
 724 \r
 725                                                 if(in->getQualifier() == EvqIn ||\r
 726                                                    in->getQualifier() == EvqInOut ||\r
 727                                                    in->getQualifier() == EvqConstReadOnly)\r
 728                                                 {\r
 729                                                         copy(in, arg[i]);\r
 730                                                 }\r
 731                                         }\r
 732 \r
 733                                         Instruction *call = emit(sw::Shader::OPCODE_CALL);\r
 734                                         call->dst.type = sw::Shader::PARAMETER_LABEL;\r
 735                                         call->dst.index = function->label;\r
 736 \r
 737                                         if(function->ret && function->ret->getType().getBasicType() != EbtVoid)\r
 738                                         {\r
 739                                                 copy(result, function->ret);\r
 740                                         }\r
 741 \r
 742                                         for(int i = 0; i < argumentCount; i++)\r
 743                                         {\r
 744                                                 TIntermTyped *argument = arguments[i]->getAsTyped();\r
 745                                                 TIntermTyped *out = arg[i]->getAsTyped();\r
 746                                                                 \r
 747                                                 if(argument->getQualifier() == EvqOut ||\r
 748                                                    argument->getQualifier() == EvqInOut)\r
 749                                                 {\r
 750                                                         copy(out, argument);\r
 751                                                 }\r
 752                                         }\r
 753                                 }\r
 754                                 else\r
 755                                 {\r
 756                                         TString name = TFunction::unmangleName(node->getName());\r
 757 \r
 758                                         if(name == "texture2D" || name == "textureCube")\r
 759                                         {\r
 760                                                 if(argumentCount == 2)\r
 761                                                 {       \r
 762                                                         emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 763                                                 }\r
 764                                                 else if(argumentCount == 3)   // bias\r
 765                                                 {\r
 766                                                         Temporary uvwb(this);\r
 767                                                         emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 768                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 769                                                         bias->dst.mask = 0x8;\r
 770 \r
 771                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &uvwb, arg[0]);   // FIXME: Implement an efficient TEXLDB instruction\r
 772                                                         tex->bias = true;\r
 773                                                 }\r
 774                                                 else UNREACHABLE();\r
 775                                         }\r
 776                                         else if(name == "texture2DProj")\r
 777                                         {\r
 778                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 779 \r
 780                                                 if(argumentCount == 2)\r
 781                                                 {\r
 782                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, arg[1], arg[0]);\r
 783                                                         tex->project = true;\r
 784 \r
 785                                                         if(t->getNominalSize() == 3)\r
 786                                                         {\r
 787                                                                 tex->src[0].swizzle = 0xA4;\r
 788                                                         }\r
 789                                                         else ASSERT(t->getNominalSize() == 4);\r
 790                                                 }\r
 791                                                 else if(argumentCount == 3)   // bias\r
 792                                                 {\r
 793                                                         Temporary proj(this);\r
 794 \r
 795                                                         if(t->getNominalSize() == 3)\r
 796                                                         {\r
 797                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 798                                                                 div->src[1].swizzle = 0xAA;\r
 799                                                                 div->dst.mask = 0x3;\r
 800                                                         }\r
 801                                                         else if(t->getNominalSize() == 4)\r
 802                                                         {\r
 803                                                                 Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 804                                                                 div->src[1].swizzle = 0xFF;\r
 805                                                                 div->dst.mask = 0x3;\r
 806                                                         }\r
 807                                                         else UNREACHABLE();\r
 808 \r
 809                                                         Instruction *bias = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 810                                                         bias->dst.mask = 0x8;\r
 811 \r
 812                                                         Instruction *tex = emit(sw::Shader::OPCODE_TEX, result, &proj, arg[0]);\r
 813                                                         tex->bias = true;\r
 814                                                 }\r
 815                                                 else UNREACHABLE();\r
 816                                         }\r
 817                                         else if(name == "texture2DLod" || name == "textureCubeLod")\r
 818                                         {\r
 819                                                 Temporary uvwb(this);\r
 820                                                 emit(sw::Shader::OPCODE_MOV, &uvwb, arg[1]);\r
 821                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &uvwb, arg[2]);\r
 822                                                 lod->dst.mask = 0x8;\r
 823 \r
 824                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &uvwb, arg[0]);\r
 825                                         }\r
 826                                         else if(name == "texture2DProjLod")\r
 827                                         {\r
 828                                                 TIntermTyped *t = arg[1]->getAsTyped();\r
 829                                                 Temporary proj(this);\r
 830 \r
 831                                                 if(t->getNominalSize() == 3)\r
 832                                                 {\r
 833                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 834                                                         div->src[1].swizzle = 0xAA;\r
 835                                                         div->dst.mask = 0x3;\r
 836                                                 }\r
 837                                                 else if(t->getNominalSize() == 4)\r
 838                                                 {\r
 839                                                         Instruction *div = emit(sw::Shader::OPCODE_DIV, &proj, arg[1], arg[1]);\r
 840                                                         div->src[1].swizzle = 0xFF;\r
 841                                                         div->dst.mask = 0x3;\r
 842                                                 }\r
 843                                                 else UNREACHABLE();\r
 844 \r
 845                                                 Instruction *lod = emit(sw::Shader::OPCODE_MOV, &proj, arg[2]);\r
 846                                                 lod->dst.mask = 0x8;\r
 847 \r
 848                                                 emit(sw::Shader::OPCODE_TEXLDL, result, &proj, arg[0]);\r
 849                                         }\r
 850                                         else UNREACHABLE();\r
 851                                 }\r
 852                         }\r
 853                         break;\r
 854                 case EOpParameters:\r
 855                         break;\r
 856                 case EOpConstructFloat:\r
 857                 case EOpConstructVec2:\r
 858                 case EOpConstructVec3:\r
 859                 case EOpConstructVec4:\r
 860                 case EOpConstructBool:\r
 861                 case EOpConstructBVec2:\r
 862                 case EOpConstructBVec3:\r
 863                 case EOpConstructBVec4:\r
 864                 case EOpConstructInt:\r
 865                 case EOpConstructIVec2:\r
 866                 case EOpConstructIVec3:\r
 867                 case EOpConstructIVec4:\r
 868                         if(visit == PostVisit)\r
 869                         {\r
 870                                 int component = 0;\r
 871 \r
 872                                 for(int i = 0; i < argumentCount; i++)\r
 873                                 {\r
 874                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
 875                                         int size = argi->getNominalSize();\r
 876 \r
 877                                         if(!argi->isMatrix())\r
 878                                         {\r
 879                                                 Instruction *mov = emitCast(result, argi);\r
 880                                                 mov->dst.mask = (0xF << component) & 0xF;\r
 881                                                 mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 882 \r
 883                                                 component += size;\r
 884                                         }\r
 885                                         else   // Matrix\r
 886                                         {\r
 887                                                 int column = 0;\r
 888 \r
 889                                                 while(component < resultType.getNominalSize())\r
 890                                                 {\r
 891                                                         Instruction *mov = emitCast(result, argi);\r
 892                                                         mov->dst.mask = (0xF << component) & 0xF;\r
 893                                                         mov->src[0].index += column;\r
 894                                                         mov->src[0].swizzle = readSwizzle(argi, size) << (component * 2);\r
 895 \r
 896                                                         column++;\r
 897                                                         component += size;\r
 898                                                 }\r
 899                                         }\r
 900                                 }\r
 901                         }\r
 902                         break;\r
 903                 case EOpConstructMat2:\r
 904                 case EOpConstructMat3:\r
 905                 case EOpConstructMat4:\r
 906                         if(visit == PostVisit)\r
 907                         {\r
 908                                 TIntermTyped *arg0 = arg[0]->getAsTyped();\r
 909                                 const int dim = result->getNominalSize();\r
 910 \r
 911                                 if(arg0->isScalar() && arg.size() == 1)   // Construct scale matrix\r
 912                                 {\r
 913                                         for(int i = 0; i < dim; i++)\r
 914                                         {\r
 915                                                 Instruction *init = emit(sw::Shader::OPCODE_MOV, result, &zero);\r
 916                                                 init->dst.index += i;\r
 917                                                 Instruction *mov = emitCast(result, arg0);\r
 918                                                 mov->dst.index += i;\r
 919                                                 mov->dst.mask = 1 << i;\r
 920                                                 ASSERT(mov->src[0].swizzle == 0x00);\r
 921                                         }\r
 922                                 }\r
 923                                 else if(arg0->isMatrix())\r
 924                                 {\r
 925                                         for(int i = 0; i < dim; i++)\r
 926                                         {\r
 927                                                 if(dim > dim2(arg0))\r
 928                                                 {\r
 929                                                         // Initialize to identity matrix\r
 930                                                         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
 931                                                         Instruction *mov = emitCast(result, &col);\r
 932                                                         mov->dst.index += i;\r
 933                                                 }\r
 934 \r
 935                                                 if(i < dim2(arg0))\r
 936                                                 {\r
 937                                                         Instruction *mov = emitCast(result, arg0);\r
 938                                                         mov->dst.index += i;\r
 939                                                         mov->dst.mask = 0xF >> (4 - dim2(arg0));\r
 940                                                         argument(mov->src[0], arg0, i);\r
 941                                                 }\r
 942                                         }\r
 943                                 }\r
 944                                 else\r
 945                                 {\r
 946                                         int column = 0;\r
 947                                         int row = 0;\r
 948 \r
 949                                         for(int i = 0; i < argumentCount; i++)\r
 950                                         {\r
 951                                                 TIntermTyped *argi = arg[i]->getAsTyped();\r
 952                                                 int size = argi->getNominalSize();\r
 953                                                 int element = 0;\r
 954 \r
 955                                                 while(element < size)\r
 956                                                 {\r
 957                                                         Instruction *mov = emitCast(result, argi);\r
 958                                                         mov->dst.index += column;\r
 959                                                         mov->dst.mask = (0xF << row) & 0xF;\r
 960                                                         mov->src[0].swizzle = (readSwizzle(argi, size) << (row * 2)) + 0x55 * element;\r
 961 \r
 962                                                         int end = row + size - element;\r
 963                                                         column = end >= dim ? column + 1 : column;\r
 964                                                         element = element + dim - row;\r
 965                                                         row = end >= dim ? 0 : end;\r
 966                                                 }\r
 967                                         }\r
 968                                 }\r
 969                         }\r
 970                         break;\r
 971                 case EOpConstructStruct:\r
 972                         if(visit == PostVisit)\r
 973                         {\r
 974                                 int offset = 0;\r
 975                                 for(int i = 0; i < argumentCount; i++)\r
 976                                 {\r
 977                                         TIntermTyped *argi = arg[i]->getAsTyped();\r
 978                                         int size = argi->totalRegisterCount();\r
 979 \r
 980                                         for(int index = 0; index < size; index++)\r
 981                                         {\r
 982                                                 Instruction *mov = emit(sw::Shader::OPCODE_MOV, result, argi);\r
 983                                                 mov->dst.index += index + offset;\r
 984                                                 mov->dst.mask = writeMask(result, offset + index);\r
 985                                                 argument(mov->src[0], argi, index);\r
 986                                         }\r
 987 \r
 988                                         offset += size;\r
 989                                 }\r
 990                         }\r
 991                         break;\r
 992                 case EOpLessThan:         if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LT, result, arg[0], arg[1]); break;\r
 993                 case EOpGreaterThan:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GT, result, arg[0], arg[1]); break;\r
 994                 case EOpLessThanEqual:    if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_LE, result, arg[0], arg[1]); break;\r
 995                 case EOpGreaterThanEqual: if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_GE, result, arg[0], arg[1]); break;\r
 996                 case EOpVectorEqual:      if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_EQ, result, arg[0], arg[1]); break;\r
 997                 case EOpVectorNotEqual:   if(visit == PostVisit) emitCmp(sw::Shader::CONTROL_NE, result, arg[0], arg[1]); break;\r
 998                 case EOpMod:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MOD, result, arg[0], arg[1]); break;\r
 999                 case EOpPow:              if(visit == PostVisit) emit(sw::Shader::OPCODE_POW, result, arg[0], arg[1]); break;\r
1000                 case EOpAtan:             if(visit == PostVisit) emit(sw::Shader::OPCODE_ATAN2, result, arg[0], arg[1]); break;\r
1001                 case EOpMin:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MIN, result, arg[0], arg[1]); break;\r
1002                 case EOpMax:              if(visit == PostVisit) emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]); break;\r
1003                 case EOpClamp:\r
1004                         if(visit == PostVisit)\r
1005                         {\r
1006                                 emit(sw::Shader::OPCODE_MAX, result, arg[0], arg[1]);\r
1007                                 emit(sw::Shader::OPCODE_MIN, result, result, arg[2]);\r
1008                         }\r
1009                         break;\r
1010                 case EOpMix:         if(visit == PostVisit) emit(sw::Shader::OPCODE_LRP, result, arg[2], arg[1], arg[0]); break;\r
1011                 case EOpStep:        if(visit == PostVisit) emit(sw::Shader::OPCODE_STEP, result, arg[0], arg[1]); break;\r
1012                 case EOpSmoothStep:  if(visit == PostVisit) emit(sw::Shader::OPCODE_SMOOTH, result, arg[0], arg[1], arg[2]); break;\r
1013                 case EOpDistance:    if(visit == PostVisit) emit(sw::Shader::OPCODE_DIST(dim(arg[0])), result, arg[0], arg[1]); break;\r
1014                 case EOpDot:         if(visit == PostVisit) emit(sw::Shader::OPCODE_DP(dim(arg[0])), result, arg[0], arg[1]); break;\r
1015                 case EOpCross:       if(visit == PostVisit) emit(sw::Shader::OPCODE_CRS, result, arg[0], arg[1]); break;\r
1016                 case EOpFaceForward: if(visit == PostVisit) emit(sw::Shader::OPCODE_FORWARD(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1017                 case EOpReflect:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFLECT(dim(arg[0])), result, arg[0], arg[1]); break;\r
1018                 case EOpRefract:     if(visit == PostVisit) emit(sw::Shader::OPCODE_REFRACT(dim(arg[0])), result, arg[0], arg[1], arg[2]); break;\r
1019                 case EOpMul:\r
1020                         if(visit == PostVisit)\r
1021                         {\r
1022                                 ASSERT(dim2(arg[0]) == dim2(arg[1]));\r
1023 \r
1024                                 for(int i = 0; i < dim2(arg[0]); i++)\r
1025                                 {\r
1026                                         Instruction *mul = emit(sw::Shader::OPCODE_MUL, result, arg[0], arg[1]);\r
1027                                         mul->dst.index += i;\r
1028                                         argument(mul->src[0], arg[0], i);\r
1029                                         argument(mul->src[1], arg[1], i);\r
1030                                 }\r
1031                         }\r
1032                         break;\r
1033                 default: UNREACHABLE();\r
1034                 }\r
1035 \r
1036                 return true;\r
1037         }\r
1038 \r
1039         bool OutputASM::visitSelection(Visit visit, TIntermSelection *node)\r
1040         {\r
1041                 if(currentScope != emitScope)\r
1042                 {\r
1043                         return false;\r
1044                 }\r
1045 \r
1046                 TIntermTyped *condition = node->getCondition();\r
1047                 TIntermNode *trueBlock = node->getTrueBlock();\r
1048                 TIntermNode *falseBlock = node->getFalseBlock();\r
1049                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
1050 \r
1051                 condition->traverse(this);\r
1052 \r
1053                 if(node->usesTernaryOperator())\r
1054                 {\r
1055                         if(constantCondition)\r
1056                         {\r
1057                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1058 \r
1059                                 if(trueCondition)\r
1060                                 {\r
1061                                         trueBlock->traverse(this);\r
1062                                         copy(node, trueBlock);\r
1063                                 }\r
1064                                 else\r
1065                                 {\r
1066                                         falseBlock->traverse(this);\r
1067                                         copy(node, falseBlock);\r
1068                                 }\r
1069                         }\r
1070                         else if(trivial(node, 6))   // Fast to compute both potential results and no side effects\r
1071                         {\r
1072                                 trueBlock->traverse(this);\r
1073                                 falseBlock->traverse(this);\r
1074                                 emit(sw::Shader::OPCODE_SELECT, node, condition, trueBlock, falseBlock);\r
1075                         }\r
1076                         else\r
1077                         {\r
1078                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1079 \r
1080                                 if(trueBlock)\r
1081                                 {\r
1082                                         trueBlock->traverse(this);\r
1083                                         copy(node, trueBlock);\r
1084                                 }\r
1085 \r
1086                                 if(falseBlock)\r
1087                                 {\r
1088                                         emit(sw::Shader::OPCODE_ELSE);\r
1089                                         falseBlock->traverse(this);\r
1090                                         copy(node, falseBlock);\r
1091                                 }\r
1092 \r
1093                                 emit(sw::Shader::OPCODE_ENDIF);\r
1094                         }\r
1095                 }\r
1096                 else  // if/else statement\r
1097                 {\r
1098                         if(constantCondition)\r
1099                         {\r
1100                                 bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1101 \r
1102                                 if(trueCondition)\r
1103                                 {\r
1104                                         if(trueBlock)\r
1105                                         {\r
1106                                                 trueBlock->traverse(this);\r
1107                                         }\r
1108                                 }\r
1109                                 else\r
1110                                 {\r
1111                                         if(falseBlock)\r
1112                                         {\r
1113                                                 falseBlock->traverse(this);\r
1114                                         }\r
1115                                 }\r
1116                         }\r
1117                         else\r
1118                         {\r
1119                                 emit(sw::Shader::OPCODE_IF, 0, condition);\r
1120 \r
1121                                 if(trueBlock)\r
1122                                 {\r
1123                                         trueBlock->traverse(this);\r
1124                                 }\r
1125 \r
1126                                 if(falseBlock)\r
1127                                 {\r
1128                                         emit(sw::Shader::OPCODE_ELSE);\r
1129                                         falseBlock->traverse(this);\r
1130                                 }\r
1131 \r
1132                                 emit(sw::Shader::OPCODE_ENDIF);\r
1133                         }\r
1134                 }\r
1135 \r
1136                 return false;\r
1137         }\r
1138 \r
1139         bool OutputASM::visitLoop(Visit visit, TIntermLoop *node)\r
1140         {\r
1141                 if(currentScope != emitScope)\r
1142                 {\r
1143                         return false;\r
1144                 }\r
1145 \r
1146                 unsigned int iterations = loopCount(node);\r
1147 \r
1148                 if(iterations == 0)\r
1149                 {\r
1150                         return false;\r
1151                 }\r
1152 \r
1153                 bool unroll = (iterations <= 4);\r
1154 \r
1155                 if(unroll)\r
1156                 {\r
1157                         DetectLoopDiscontinuity detectLoopDiscontinuity;\r
1158                         unroll = !detectLoopDiscontinuity.traverse(node);\r
1159                 }\r
1160 \r
1161                 TIntermNode *init = node->getInit();\r
1162                 TIntermTyped *condition = node->getCondition();\r
1163                 TIntermTyped *expression = node->getExpression();\r
1164                 TIntermNode *body = node->getBody();\r
1165 \r
1166                 if(node->getType() == ELoopDoWhile)\r
1167                 {\r
1168                         Temporary iterate(this);\r
1169                         Constant True(true);\r
1170                         emit(sw::Shader::OPCODE_MOV, &iterate, &True);\r
1171 \r
1172                         emit(sw::Shader::OPCODE_WHILE, 0, &iterate);   // FIXME: Implement real do-while\r
1173 \r
1174                         if(body)\r
1175                         {\r
1176                                 body->traverse(this);\r
1177                         }\r
1178 \r
1179                         emit(sw::Shader::OPCODE_TEST);\r
1180 \r
1181                         condition->traverse(this);\r
1182                         emit(sw::Shader::OPCODE_MOV, &iterate, condition);\r
1183 \r
1184                         emit(sw::Shader::OPCODE_ENDWHILE);\r
1185                 }\r
1186                 else\r
1187                 {\r
1188                         if(init)\r
1189                         {\r
1190                                 init->traverse(this);\r
1191                         }\r
1192 \r
1193                         if(unroll)\r
1194                         {\r
1195                                 for(unsigned int i = 0; i < iterations; i++)\r
1196                                 {\r
1197                                 //      condition->traverse(this);   // Condition could contain statements, but not in an unrollable loop\r
1198 \r
1199                                         if(body)\r
1200                                         {\r
1201                                                 body->traverse(this);\r
1202                                         }\r
1203 \r
1204                                         if(expression)\r
1205                                         {\r
1206                                                 expression->traverse(this);\r
1207                                         }\r
1208                                 }\r
1209                         }\r
1210                         else\r
1211                         {\r
1212                                 condition->traverse(this);\r
1213 \r
1214                                 emit(sw::Shader::OPCODE_WHILE, 0, condition);\r
1215 \r
1216                                 if(body)\r
1217                                 {\r
1218                                         body->traverse(this);\r
1219                                 }\r
1220 \r
1221                                 emit(sw::Shader::OPCODE_TEST);\r
1222 \r
1223                                 if(expression)\r
1224                                 {\r
1225                                         expression->traverse(this);\r
1226                                 }\r
1227 \r
1228                                 condition->traverse(this);\r
1229 \r
1230                                 emit(sw::Shader::OPCODE_ENDWHILE);\r
1231                         }\r
1232                 }\r
1233 \r
1234                 return false;\r
1235         }\r
1236 \r
1237         bool OutputASM::visitBranch(Visit visit, TIntermBranch *node)\r
1238         {\r
1239                 if(currentScope != emitScope)\r
1240                 {\r
1241                         return false;\r
1242                 }\r
1243 \r
1244                 switch(node->getFlowOp())\r
1245                 {\r
1246                 case EOpKill:      if(visit == PostVisit) emit(sw::Shader::OPCODE_DISCARD);  break;\r
1247                 case EOpBreak:     if(visit == PostVisit) emit(sw::Shader::OPCODE_BREAK);    break;\r
1248                 case EOpContinue:  if(visit == PostVisit) emit(sw::Shader::OPCODE_CONTINUE); break;\r
1249                 case EOpReturn:\r
1250                         if(visit == PostVisit)\r
1251                         {\r
1252                                 TIntermTyped *value = node->getExpression();\r
1253 \r
1254                                 if(value)\r
1255                                 {\r
1256                                         copy(functionArray[currentFunction].ret, value);\r
1257                                 }\r
1258 \r
1259                                 emit(sw::Shader::OPCODE_LEAVE);\r
1260                         }\r
1261                         break;\r
1262                 default: UNREACHABLE();\r
1263                 }\r
1264 \r
1265                 return true;\r
1266         }\r
1267 \r
1268         bool OutputASM::isSamplerRegister(TIntermTyped *operand)\r
1269         {\r
1270                 // A sampler register's qualifiers can be:\r
1271                 // - EvqUniform: The sampler uniform is used as is in the code (default case).\r
1272                 // - EvqTemporary: The sampler is indexed. It's still a sampler register.\r
1273                 // - EvqIn (and other similar types): The sampler has been passed as a function argument. At this point,\r
1274                 //                                    the sampler has been copied and is no longer a sampler register.\r
1275                 return IsSampler(operand->getBasicType()) && (operand->getQualifier() == EvqUniform || operand->getQualifier() == EvqTemporary);\r
1276         }\r
1277 \r
1278         Instruction *OutputASM::emit(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2, int index)\r
1279         {\r
1280                 if(dst && isSamplerRegister(dst))\r
1281                 {\r
1282                         op = sw::Shader::OPCODE_NULL;   // Can't assign to a sampler, but this is hit when indexing sampler arrays\r
1283                 }\r
1284 \r
1285                 Instruction *instruction = new Instruction(op);\r
1286 \r
1287                 if(dst)\r
1288                 {\r
1289                         instruction->dst.type = registerType(dst);\r
1290                         instruction->dst.index = registerIndex(dst) + index;\r
1291                         instruction->dst.mask = writeMask(dst);\r
1292                         instruction->dst.integer = (dst->getBasicType() == EbtInt);\r
1293                 }\r
1294 \r
1295                 argument(instruction->src[0], src0, index);\r
1296                 argument(instruction->src[1], src1, index);\r
1297                 argument(instruction->src[2], src2, index);\r
1298 \r
1299                 shader->append(instruction);\r
1300 \r
1301                 return instruction;\r
1302         }\r
1303 \r
1304         Instruction *OutputASM::emitCast(TIntermTyped *dst, TIntermTyped *src)\r
1305         {\r
1306                 // Integers are implemented as float\r
1307                 if((dst->getBasicType() == EbtFloat || dst->getBasicType() == EbtInt) && src->getBasicType() == EbtBool)\r
1308                 {\r
1309                         return emit(sw::Shader::OPCODE_B2F, dst, src);\r
1310                 }\r
1311                 if(dst->getBasicType() == EbtBool && (src->getBasicType() == EbtFloat || src->getBasicType() == EbtInt))\r
1312                 {\r
1313                         return emit(sw::Shader::OPCODE_F2B, dst, src);\r
1314                 }\r
1315                 if(dst->getBasicType() == EbtInt && src->getBasicType() == EbtFloat)\r
1316                 {\r
1317                         return emit(sw::Shader::OPCODE_TRUNC, dst, src);\r
1318                 }\r
1319 \r
1320                 return emit(sw::Shader::OPCODE_MOV, dst, src);\r
1321         }\r
1322 \r
1323         void OutputASM::emitBinary(sw::Shader::Opcode op, TIntermTyped *dst, TIntermNode *src0, TIntermNode *src1, TIntermNode *src2)\r
1324         {\r
1325                 for(int index = 0; index < dst->elementRegisterCount(); index++)\r
1326                 {\r
1327                         emit(op, dst, src0, src1, src2, index);\r
1328                 }\r
1329         }\r
1330 \r
1331         void OutputASM::emitAssign(sw::Shader::Opcode op, TIntermTyped *result, TIntermTyped *lhs, TIntermTyped *src0, TIntermTyped *src1)\r
1332         {\r
1333                 emitBinary(op, result, src0, src1);\r
1334                 assignLvalue(lhs, result);\r
1335         }\r
1336 \r
1337         void OutputASM::emitCmp(sw::Shader::Control cmpOp, TIntermTyped *dst, TIntermNode *left, TIntermNode *right, int index)\r
1338         {\r
1339                 bool boolean = (left->getAsTyped()->getBasicType() == EbtBool);\r
1340                 sw::Shader::Opcode opcode = boolean ? sw::Shader::OPCODE_ICMP : sw::Shader::OPCODE_CMP;\r
1341 \r
1342                 Instruction *cmp = emit(opcode, dst, left, right);\r
1343                 cmp->control = cmpOp;\r
1344                 argument(cmp->src[0], left, index);\r
1345                 argument(cmp->src[1], right, index);\r
1346         }\r
1347 \r
1348         int componentCount(const TType &type, int registers)\r
1349         {\r
1350                 if(registers == 0)\r
1351                 {\r
1352                         return 0;\r
1353                 }\r
1354 \r
1355                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1356                 {\r
1357                         int index = registers / type.elementRegisterCount();\r
1358                         registers -= index * type.elementRegisterCount();\r
1359                         return index * type.getElementSize() + componentCount(type, registers);\r
1360                 }\r
1361 \r
1362                 if(type.isStruct())\r
1363                 {\r
1364                         TTypeList *structure = type.getStruct();\r
1365                         int elements = 0;\r
1366 \r
1367                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1368                         {\r
1369                                 const TType &fieldType = *field->type;\r
1370 \r
1371                                 if(fieldType.totalRegisterCount() <= registers)\r
1372                                 {\r
1373                                         registers -= fieldType.totalRegisterCount();\r
1374                                         elements += fieldType.getObjectSize();\r
1375                                 }\r
1376                                 else   // Register within this field\r
1377                                 {\r
1378                                         return elements + componentCount(fieldType, registers);\r
1379                                 }\r
1380                         }\r
1381                 }\r
1382                 else if(type.isMatrix())\r
1383                 {\r
1384                         return registers * type.getNominalSize();\r
1385                 }\r
1386                 \r
1387                 UNREACHABLE();\r
1388                 return 0;\r
1389         }\r
1390 \r
1391         int registerSize(const TType &type, int registers)\r
1392         {\r
1393                 if(registers == 0)\r
1394                 {\r
1395                         if(type.isStruct())\r
1396                         {\r
1397                                 return registerSize(*type.getStruct()->begin()->type, 0);\r
1398                         }\r
1399 \r
1400                         return type.getNominalSize();\r
1401                 }\r
1402 \r
1403                 if(type.isArray() && registers >= type.elementRegisterCount())\r
1404                 {\r
1405                         int index = registers / type.elementRegisterCount();\r
1406                         registers -= index * type.elementRegisterCount();\r
1407                         return registerSize(type, registers);\r
1408                 }\r
1409 \r
1410                 if(type.isStruct())\r
1411                 {\r
1412                         TTypeList *structure = type.getStruct();\r
1413                         int elements = 0;\r
1414 \r
1415                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1416                         {\r
1417                                 const TType &fieldType = *field->type;\r
1418                                 \r
1419                                 if(fieldType.totalRegisterCount() <= registers)\r
1420                                 {\r
1421                                         registers -= fieldType.totalRegisterCount();\r
1422                                         elements += fieldType.getObjectSize();\r
1423                                 }\r
1424                                 else   // Register within this field\r
1425                                 {\r
1426                                         return registerSize(fieldType, registers);\r
1427                                 }\r
1428                         }\r
1429                 }\r
1430                 else if(type.isMatrix())\r
1431                 {\r
1432                         return registerSize(type, 0);\r
1433                 }\r
1434                 \r
1435                 UNREACHABLE();\r
1436                 return 0;\r
1437         }\r
1438 \r
1439         void OutputASM::argument(sw::Shader::SourceParameter &parameter, TIntermNode *argument, int index)\r
1440         {\r
1441                 if(argument)\r
1442                 {\r
1443                         TIntermTyped *arg = argument->getAsTyped();\r
1444                         const TType &type = arg->getType();\r
1445                         const TTypeList *structure = type.getStruct();\r
1446                         index = (index >= arg->totalRegisterCount()) ? arg->totalRegisterCount() - 1 : index;\r
1447 \r
1448                         int size = registerSize(type, index);\r
1449 \r
1450                         parameter.type = registerType(arg);\r
1451 \r
1452                         if(arg->getQualifier() == EvqConst)\r
1453                         {\r
1454                                 int component = componentCount(type, index);\r
1455                                 ConstantUnion *constants = arg->getAsConstantUnion()->getUnionArrayPointer();\r
1456 \r
1457                                 for(int i = 0; i < 4; i++)\r
1458                                 {\r
1459                                         if(size == 1)   // Replicate\r
1460                                         {\r
1461                                                 parameter.value[i] = constants[component + 0].getAsFloat();\r
1462                                         }\r
1463                                         else if(i < size)\r
1464                                         {\r
1465                                                 parameter.value[i] = constants[component + i].getAsFloat();\r
1466                                         }\r
1467                                         else\r
1468                                         {\r
1469                                                 parameter.value[i] = 0.0f;\r
1470                                         }\r
1471                                 }\r
1472                         }\r
1473                         else\r
1474                         {\r
1475                                 parameter.index = registerIndex(arg) + index;\r
1476 \r
1477                                 if(isSamplerRegister(arg))\r
1478                                 {\r
1479                                         TIntermBinary *binary = argument->getAsBinaryNode();\r
1480 \r
1481                                         if(binary)\r
1482                                         {\r
1483                                                 TIntermTyped *left = binary->getLeft();\r
1484                                                 TIntermTyped *right = binary->getRight();\r
1485 \r
1486                                                 if(binary->getOp() == EOpIndexDirect)\r
1487                                                 {\r
1488                                                         parameter.index += right->getAsConstantUnion()->getUnionArrayPointer()->getIConst();\r
1489                                                 }\r
1490                                                 else if(binary->getOp() == EOpIndexIndirect)\r
1491                                                 {\r
1492                                                         if(left->getArraySize() > 1)\r
1493                                                         {\r
1494                                                                 parameter.rel.type = registerType(binary->getRight());\r
1495                                                                 parameter.rel.index = registerIndex(binary->getRight());\r
1496                                                                 parameter.rel.scale = 1;\r
1497                                                                 parameter.rel.deterministic = true;\r
1498                                                         }\r
1499                                                 }\r
1500                                                 else UNREACHABLE();\r
1501                                         }\r
1502                                 }\r
1503                         }\r
1504 \r
1505                         if(!IsSampler(arg->getBasicType()))\r
1506                         {\r
1507                                 parameter.swizzle = readSwizzle(arg, size);\r
1508                         }\r
1509                 }\r
1510         }\r
1511 \r
1512         void OutputASM::copy(TIntermTyped *dst, TIntermNode *src, int offset)\r
1513         {\r
1514                 for(int index = 0; index < dst->totalRegisterCount(); index++)\r
1515                 {\r
1516                         Instruction *mov = emit(sw::Shader::OPCODE_MOV, dst, src);\r
1517                         mov->dst.index += index;\r
1518                         mov->dst.mask = writeMask(dst, index);\r
1519                         argument(mov->src[0], src, offset + index);\r
1520                 }\r
1521         }\r
1522 \r
1523         int swizzleElement(int swizzle, int index)\r
1524         {\r
1525                 return (swizzle >> (index * 2)) & 0x03;\r
1526         }\r
1527 \r
1528         int swizzleSwizzle(int leftSwizzle, int rightSwizzle)\r
1529         {\r
1530                 return (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 0)) << 0) |\r
1531                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 1)) << 2) |\r
1532                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 2)) << 4) |\r
1533                        (swizzleElement(leftSwizzle, swizzleElement(rightSwizzle, 3)) << 6);\r
1534         }\r
1535 \r
1536         void OutputASM::assignLvalue(TIntermTyped *dst, TIntermTyped *src)\r
1537         {\r
1538                 if(src &&\r
1539                         ((src->isVector() && (!dst->isVector() || (dst->getNominalSize() != dst->getNominalSize()))) ||\r
1540                          (src->isMatrix() && (!dst->isMatrix() || (src->getNominalSize() != dst->getNominalSize())))))\r
1541                 {\r
1542                         return mContext.error(src->getLine(), "Result type should match the l-value type in compound assignment", src->isVector() ? "vector" : "matrix");\r
1543                 }\r
1544 \r
1545                 TIntermBinary *binary = dst->getAsBinaryNode();\r
1546 \r
1547                 if(binary && binary->getOp() == EOpIndexIndirect && dst->isScalar())\r
1548                 {\r
1549                         Instruction *insert = new Instruction(sw::Shader::OPCODE_INSERT);\r
1550                         \r
1551                         Temporary address(this);\r
1552                         lvalue(insert->dst, address, dst);\r
1553 \r
1554                         insert->src[0].type = insert->dst.type;\r
1555                         insert->src[0].index = insert->dst.index;\r
1556                         insert->src[0].rel = insert->dst.rel;\r
1557                         argument(insert->src[1], src);\r
1558                         argument(insert->src[2], binary->getRight());\r
1559 \r
1560                         shader->append(insert);\r
1561                 }\r
1562                 else\r
1563                 {\r
1564                         for(int offset = 0; offset < dst->totalRegisterCount(); offset++)\r
1565                         {\r
1566                                 Instruction *mov = new Instruction(sw::Shader::OPCODE_MOV);\r
1567                         \r
1568                                 Temporary address(this);\r
1569                                 int swizzle = lvalue(mov->dst, address, dst);\r
1570                                 mov->dst.index += offset;\r
1571 \r
1572                                 if(offset > 0)\r
1573                                 {\r
1574                                         mov->dst.mask = writeMask(dst, offset);\r
1575                                 }\r
1576 \r
1577                                 argument(mov->src[0], src, offset);\r
1578                                 mov->src[0].swizzle = swizzleSwizzle(mov->src[0].swizzle, swizzle);\r
1579 \r
1580                                 shader->append(mov);\r
1581                         }\r
1582                 }\r
1583         }\r
1584 \r
1585         int OutputASM::lvalue(sw::Shader::DestinationParameter &dst, Temporary &address, TIntermTyped *node)\r
1586         {\r
1587                 TIntermTyped *result = node;\r
1588                 TIntermBinary *binary = node->getAsBinaryNode();\r
1589                 TIntermSymbol *symbol = node->getAsSymbolNode();\r
1590 \r
1591                 if(binary)\r
1592                 {\r
1593                         TIntermTyped *left = binary->getLeft();\r
1594                         TIntermTyped *right = binary->getRight();\r
1595 \r
1596                         int leftSwizzle = lvalue(dst, address, left);   // Resolve the l-value of the left side\r
1597 \r
1598                         switch(binary->getOp())\r
1599                         {\r
1600                         case EOpIndexDirect:\r
1601                                 {\r
1602                                         int rightIndex = right->getAsConstantUnion()->getUnionArrayPointer()->getIConst();\r
1603 \r
1604                                         if(left->isRegister())\r
1605                                         {\r
1606                                                 int leftMask = dst.mask;\r
1607                                                 \r
1608                                                 dst.mask = 1;\r
1609                                                 while((leftMask & dst.mask) == 0)\r
1610                                                 {\r
1611                                                         dst.mask = dst.mask << 1;\r
1612                                                 }\r
1613 \r
1614                                                 int element = swizzleElement(leftSwizzle, rightIndex);\r
1615                                                 dst.mask = 1 << element;\r
1616                                                 \r
1617                                                 return element;\r
1618                                         }\r
1619                                         else if(left->isArray() || left->isMatrix())\r
1620                                         {\r
1621                                                 dst.index += rightIndex * result->totalRegisterCount();\r
1622                                                 return 0xE4;\r
1623                                         }\r
1624                                         else UNREACHABLE();\r
1625                                 }\r
1626                                 break;\r
1627                         case EOpIndexIndirect:\r
1628                                 {\r
1629                                         if(left->isRegister())\r
1630                                         {\r
1631                                                 // Requires INSERT instruction (handled by calling function)\r
1632                                         }\r
1633                                         else if(left->isArray() || left->isMatrix())\r
1634                                         {\r
1635                                                 int scale = result->totalRegisterCount();\r
1636 \r
1637                                                 if(dst.rel.type == sw::Shader::PARAMETER_VOID)   // Use the index register as the relative address directly\r
1638                                                 {\r
1639                                                         if(left->totalRegisterCount() > 1)\r
1640                                                         {\r
1641                                                                 sw::Shader::SourceParameter relativeRegister;\r
1642                                                                 argument(relativeRegister, right);\r
1643 \r
1644                                                                 dst.rel.index = relativeRegister.index;\r
1645                                                                 dst.rel.type = relativeRegister.type;\r
1646                                                                 dst.rel.scale = scale;\r
1647                                                                 dst.rel.deterministic = !(vertexShader && left->getQualifier() == EvqUniform);\r
1648                                                         }\r
1649                                                 }\r
1650                                                 else if(dst.rel.index != registerIndex(&address))   // Move the previous index register to the address register\r
1651                                                 {\r
1652                                                         if(scale == 1)\r
1653                                                         {\r
1654                                                                 Constant oldScale((int)dst.rel.scale);\r
1655                                                                 Instruction *mad = emit(sw::Shader::OPCODE_MAD, &address, &address, &oldScale, right);\r
1656                                                                 mad->src[0].index = dst.rel.index;\r
1657                                                                 mad->src[0].type = dst.rel.type;\r
1658                                                         }\r
1659                                                         else\r
1660                                                         {\r
1661                                                                 Constant oldScale((int)dst.rel.scale);\r
1662                                                                 Instruction *mul = emit(sw::Shader::OPCODE_MUL, &address, &address, &oldScale);\r
1663                                                                 mul->src[0].index = dst.rel.index;\r
1664                                                                 mul->src[0].type = dst.rel.type;\r
1665 \r
1666                                                                 Constant newScale(scale);\r
1667                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1668                                                         }\r
1669 \r
1670                                                         dst.rel.type = sw::Shader::PARAMETER_TEMP;\r
1671                                                         dst.rel.index = registerIndex(&address);\r
1672                                                         dst.rel.scale = 1;\r
1673                                                 }\r
1674                                                 else   // Just add the new index to the address register\r
1675                                                 {\r
1676                                                         if(scale == 1)\r
1677                                                         {\r
1678                                                                 emit(sw::Shader::OPCODE_ADD, &address, &address, right);\r
1679                                                         }\r
1680                                                         else\r
1681                                                         {\r
1682                                                                 Constant newScale(scale);\r
1683                                                                 emit(sw::Shader::OPCODE_MAD, &address, right, &newScale, &address);\r
1684                                                         }\r
1685                                                 }\r
1686                                         }\r
1687                                         else UNREACHABLE();\r
1688                                 }\r
1689                                 break;\r
1690                         case EOpIndexDirectStruct:\r
1691                                 {\r
1692                                         const TTypeList *structure = left->getType().getStruct();\r
1693                                         const TString &fieldName = right->getType().getFieldName();\r
1694 \r
1695                                         int offset = 0;\r
1696                                         for(TTypeList::const_iterator field = structure->begin(); field != structure->end(); field++)\r
1697                                         {\r
1698                                                 if(field->type->getFieldName() == fieldName)\r
1699                                                 {\r
1700                                                         dst.type = registerType(left);\r
1701                                                         dst.index += offset;\r
1702                                                         dst.mask = writeMask(right);\r
1703                                                         \r
1704                                                         return 0xE4;\r
1705                                                 }\r
1706 \r
1707                                                 offset += field->type->totalRegisterCount();\r
1708                                         }\r
1709                                 }\r
1710                                 break;\r
1711                         case EOpVectorSwizzle:\r
1712                                 {\r
1713                                         ASSERT(left->isRegister());\r
1714 \r
1715                                         int leftMask = dst.mask;\r
1716 \r
1717                                         int swizzle = 0;\r
1718                                         int rightMask = 0;\r
1719 \r
1720                                         TIntermSequence &sequence = right->getAsAggregate()->getSequence();\r
1721 \r
1722                                         for(unsigned int i = 0; i < sequence.size(); i++)\r
1723                                         {\r
1724                                                 int index = sequence[i]->getAsConstantUnion()->getUnionArrayPointer()->getIConst();\r
1725 \r
1726                                                 int element = swizzleElement(leftSwizzle, index);\r
1727                                                 rightMask = rightMask | (1 << element);\r
1728                                                 swizzle = swizzle | swizzleElement(leftSwizzle, i) << (element * 2);\r
1729                                         }\r
1730                                         \r
1731                                         dst.mask = leftMask & rightMask;\r
1732 \r
1733                                         return swizzle;\r
1734                                 }\r
1735                                 break;\r
1736                         default:\r
1737                                 UNREACHABLE();   // Not an l-value operator\r
1738                                 break;\r
1739                         }\r
1740                 }\r
1741                 else if(symbol)\r
1742                 {\r
1743                         dst.type = registerType(symbol);\r
1744                         dst.index = registerIndex(symbol);\r
1745                         dst.mask = writeMask(symbol);\r
1746                         return 0xE4;\r
1747                 }\r
1748 \r
1749                 return 0xE4;\r
1750         }\r
1751 \r
1752         sw::Shader::ParameterType OutputASM::registerType(TIntermTyped *operand)\r
1753         {\r
1754                 if(isSamplerRegister(operand))\r
1755                 {\r
1756                         return sw::Shader::PARAMETER_SAMPLER;\r
1757                 }\r
1758 \r
1759                 const TQualifier qualifier = operand->getQualifier();\r
1760                 if((EvqFragColor == qualifier) || (EvqFragData == qualifier))\r
1761                 {\r
1762                         if(((EvqFragData == qualifier) && (EvqFragColor == outputQualifier)) ||\r
1763                            ((EvqFragColor == qualifier) && (EvqFragData == outputQualifier)))\r
1764                         {\r
1765                                 mContext.error(operand->getLine(), "static assignment to both gl_FragData and gl_FragColor", "");\r
1766                         }\r
1767                         outputQualifier = qualifier;\r
1768                 }\r
1769 \r
1770                 switch(qualifier)\r
1771                 {\r
1772                 case EvqTemporary:           return sw::Shader::PARAMETER_TEMP;\r
1773                 case EvqGlobal:              return sw::Shader::PARAMETER_TEMP;\r
1774                 case EvqConst:               return sw::Shader::PARAMETER_FLOAT4LITERAL;   // All converted to float\r
1775                 case EvqAttribute:           return sw::Shader::PARAMETER_INPUT;\r
1776                 case EvqVaryingIn:           return sw::Shader::PARAMETER_INPUT;\r
1777                 case EvqVaryingOut:          return sw::Shader::PARAMETER_OUTPUT;\r
1778                 case EvqInvariantVaryingIn:  return sw::Shader::PARAMETER_INPUT;    // FIXME: Guarantee invariance at the backend\r
1779                 case EvqInvariantVaryingOut: return sw::Shader::PARAMETER_OUTPUT;   // FIXME: Guarantee invariance at the backend \r
1780                 case EvqUniform:             return sw::Shader::PARAMETER_CONST;\r
1781                 case EvqIn:                  return sw::Shader::PARAMETER_TEMP;\r
1782                 case EvqOut:                 return sw::Shader::PARAMETER_TEMP;\r
1783                 case EvqInOut:               return sw::Shader::PARAMETER_TEMP;\r
1784                 case EvqConstReadOnly:       return sw::Shader::PARAMETER_TEMP;\r
1785                 case EvqPosition:            return sw::Shader::PARAMETER_OUTPUT;\r
1786                 case EvqPointSize:           return sw::Shader::PARAMETER_OUTPUT;\r
1787                 case EvqFragCoord:           return sw::Shader::PARAMETER_MISCTYPE;\r
1788                 case EvqFrontFacing:         return sw::Shader::PARAMETER_MISCTYPE;\r
1789                 case EvqPointCoord:          return sw::Shader::PARAMETER_INPUT;\r
1790                 case EvqFragColor:           return sw::Shader::PARAMETER_COLOROUT;\r
1791                 case EvqFragData:            return sw::Shader::PARAMETER_COLOROUT;\r
1792                 default: UNREACHABLE();\r
1793                 }\r
1794 \r
1795                 return sw::Shader::PARAMETER_VOID;\r
1796         }\r
1797 \r
1798         int OutputASM::registerIndex(TIntermTyped *operand)\r
1799         {\r
1800                 if(isSamplerRegister(operand))\r
1801                 {\r
1802                         return samplerRegister(operand);\r
1803                 }\r
1804 \r
1805                 switch(operand->getQualifier())\r
1806                 {\r
1807                 case EvqTemporary:           return temporaryRegister(operand);\r
1808                 case EvqGlobal:              return temporaryRegister(operand);\r
1809                 case EvqConst:               UNREACHABLE();\r
1810                 case EvqAttribute:           return attributeRegister(operand);\r
1811                 case EvqVaryingIn:           return varyingRegister(operand);\r
1812                 case EvqVaryingOut:          return varyingRegister(operand);\r
1813                 case EvqInvariantVaryingIn:  return varyingRegister(operand);\r
1814                 case EvqInvariantVaryingOut: return varyingRegister(operand);\r
1815                 case EvqUniform:             return uniformRegister(operand);\r
1816                 case EvqIn:                  return temporaryRegister(operand);\r
1817                 case EvqOut:                 return temporaryRegister(operand);\r
1818                 case EvqInOut:               return temporaryRegister(operand);\r
1819                 case EvqConstReadOnly:       return temporaryRegister(operand);\r
1820                 case EvqPosition:            return varyingRegister(operand);\r
1821                 case EvqPointSize:           return varyingRegister(operand);\r
1822                 case EvqFragCoord:           pixelShader->vPosDeclared = true;  return 0;\r
1823                 case EvqFrontFacing:         pixelShader->vFaceDeclared = true; return 1;\r
1824                 case EvqPointCoord:          return varyingRegister(operand);\r
1825                 case EvqFragColor:           return 0;\r
1826                 case EvqFragData:            return 0;\r
1827                 default: UNREACHABLE();\r
1828                 }\r
1829 \r
1830                 return 0;\r
1831         }\r
1832 \r
1833         int OutputASM::writeMask(TIntermTyped *destination, int index)\r
1834         {\r
1835                 if(destination->getQualifier() == EvqPointSize)\r
1836                 {\r
1837                         return 0x2;   // Point size stored in the y component\r
1838                 }\r
1839 \r
1840                 return 0xF >> (4 - registerSize(destination->getType(), index));\r
1841         }\r
1842 \r
1843         int OutputASM::readSwizzle(TIntermTyped *argument, int size)\r
1844         {\r
1845                 if(argument->getQualifier() == EvqPointSize)\r
1846                 {\r
1847                         return 0x55;   // Point size stored in the y component\r
1848                 }\r
1849 \r
1850                 static const unsigned char swizzleSize[5] = {0x00, 0x00, 0x54, 0xA4, 0xE4};   // (void), xxxx, xyyy, xyzz, xyzw\r
1851 \r
1852                 return swizzleSize[size];\r
1853         }\r
1854 \r
1855         // Conservatively checks whether an expression is fast to compute and has no side effects\r
1856         bool OutputASM::trivial(TIntermTyped *expression, int budget)\r
1857         {\r
1858                 if(!expression->isRegister())\r
1859                 {\r
1860                         return false;\r
1861                 }\r
1862 \r
1863                 return cost(expression, budget) >= 0;\r
1864         }\r
1865 \r
1866         // Returns the remaining computing budget (if < 0 the expression is too expensive or has side effects)\r
1867         int OutputASM::cost(TIntermNode *expression, int budget)\r
1868         {\r
1869                 if(budget < 0)\r
1870                 {\r
1871                         return budget;\r
1872                 }\r
1873 \r
1874                 if(expression->getAsSymbolNode())\r
1875                 {\r
1876                         return budget;\r
1877                 }\r
1878                 else if(expression->getAsConstantUnion())\r
1879                 {\r
1880                         return budget;\r
1881                 }\r
1882                 else if(expression->getAsBinaryNode())\r
1883                 {\r
1884                         TIntermBinary *binary = expression->getAsBinaryNode();\r
1885 \r
1886                         switch(binary->getOp())\r
1887                         {\r
1888                         case EOpVectorSwizzle:\r
1889                         case EOpIndexDirect:\r
1890                         case EOpIndexDirectStruct:\r
1891                                 return cost(binary->getLeft(), budget - 0);\r
1892                         case EOpAdd:\r
1893                         case EOpSub:\r
1894                         case EOpMul:\r
1895                                 return cost(binary->getLeft(), cost(binary->getRight(), budget - 1));\r
1896                         default:\r
1897                                 return -1;\r
1898                         }\r
1899                 }\r
1900                 else if(expression->getAsUnaryNode())\r
1901                 {\r
1902                         TIntermUnary *unary = expression->getAsUnaryNode();\r
1903 \r
1904                         switch(unary->getOp())\r
1905                         {\r
1906                         case EOpAbs:\r
1907                         case EOpNegative:\r
1908                                 return cost(unary->getOperand(), budget - 1);\r
1909                         default:\r
1910                                 return -1;\r
1911                         }\r
1912                 }\r
1913                 else if(expression->getAsSelectionNode())\r
1914                 {\r
1915                         TIntermSelection *selection = expression->getAsSelectionNode();\r
1916 \r
1917                         if(selection->usesTernaryOperator())\r
1918                         {\r
1919                                 TIntermTyped *condition = selection->getCondition();\r
1920                                 TIntermNode *trueBlock = selection->getTrueBlock();\r
1921                                 TIntermNode *falseBlock = selection->getFalseBlock();\r
1922                                 TIntermConstantUnion *constantCondition = condition->getAsConstantUnion();\r
1923 \r
1924                                 if(constantCondition)\r
1925                                 {\r
1926                                         bool trueCondition = constantCondition->getUnionArrayPointer()->getBConst();\r
1927 \r
1928                                         if(trueCondition)\r
1929                                         {\r
1930                                                 return cost(trueBlock, budget - 0);\r
1931                                         }\r
1932                                         else\r
1933                                         {\r
1934                                                 return cost(falseBlock, budget - 0);\r
1935                                         }\r
1936                                 }\r
1937                                 else\r
1938                                 {\r
1939                                         return cost(trueBlock, cost(falseBlock, budget - 2));\r
1940                                 }\r
1941                         }\r
1942                 }\r
1943 \r
1944                 return -1;\r
1945         }\r
1946 \r
1947         const Function *OutputASM::findFunction(const TString &name)\r
1948         {\r
1949                 for(unsigned int f = 0; f < functionArray.size(); f++)\r
1950                 {\r
1951                         if(functionArray[f].name == name)\r
1952                         {\r
1953                                 return &functionArray[f];\r
1954                         }\r
1955                 }\r
1956 \r
1957                 return 0;\r
1958         }\r
1959         \r
1960         int OutputASM::temporaryRegister(TIntermTyped *temporary)\r
1961         {\r
1962                 return allocate(temporaries, temporary);\r
1963         }\r
1964 \r
1965         int OutputASM::varyingRegister(TIntermTyped *varying)\r
1966         {\r
1967                 int var = lookup(varyings, varying);\r
1968 \r
1969                 if(var == -1)\r
1970                 {\r
1971                         var = allocate(varyings, varying);\r
1972                         int componentCount = varying->getNominalSize();\r
1973                         int registerCount = varying->totalRegisterCount();\r
1974 \r
1975                         if(pixelShader)\r
1976                         {\r
1977                                 if((var + registerCount) > sw::PixelShader::MAX_INPUT_VARYINGS)\r
1978                                 {\r
1979                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "fragment shader");\r
1980                                         return 0;\r
1981                                 }\r
1982 \r
1983                                 if(varying->getQualifier() == EvqPointCoord)\r
1984                                 {\r
1985                                         ASSERT(varying->isRegister());\r
1986                                         if(componentCount >= 1) pixelShader->semantic[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
1987                                         if(componentCount >= 2) pixelShader->semantic[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
1988                                         if(componentCount >= 3) pixelShader->semantic[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
1989                                         if(componentCount >= 4) pixelShader->semantic[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, var);\r
1990                                 }\r
1991                                 else\r
1992                                 {\r
1993                                         for(int i = 0; i < varying->totalRegisterCount(); i++)\r
1994                                         {\r
1995                                                 if(componentCount >= 1) pixelShader->semantic[var + i][0] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
1996                                                 if(componentCount >= 2) pixelShader->semantic[var + i][1] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
1997                                                 if(componentCount >= 3) pixelShader->semantic[var + i][2] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
1998                                                 if(componentCount >= 4) pixelShader->semantic[var + i][3] = sw::Shader::Semantic(sw::Shader::USAGE_COLOR, var + i);\r
1999                                         }\r
2000                                 }\r
2001                         }\r
2002                         else if(vertexShader)\r
2003                         {\r
2004                                 if((var + registerCount) > sw::VertexShader::MAX_OUTPUT_VARYINGS)\r
2005                                 {\r
2006                                         mContext.error(varying->getLine(), "Varyings packing failed: Too many varyings", "vertex shader");\r
2007                                         return 0;\r
2008                                 }\r
2009 \r
2010                                 if(varying->getQualifier() == EvqPosition)\r
2011                                 {\r
2012                                         ASSERT(varying->isRegister());\r
2013                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2014                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2015                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2016                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_POSITION, 0);\r
2017                                         vertexShader->positionRegister = var;\r
2018                                 }\r
2019                                 else if(varying->getQualifier() == EvqPointSize)\r
2020                                 {\r
2021                                         ASSERT(varying->isRegister());\r
2022                                         vertexShader->output[var][0] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2023                                         vertexShader->output[var][1] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2024                                         vertexShader->output[var][2] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2025                                         vertexShader->output[var][3] = sw::Shader::Semantic(sw::Shader::USAGE_PSIZE, 0);\r
2026                                         vertexShader->pointSizeRegister = var;\r
2027                                 }\r
2028                                 else\r
2029                                 {\r
2030                                         // Semantic indexes for user varyings will be assigned during program link to match the pixel shader\r
2031                                 }\r
2032                         }\r
2033                         else UNREACHABLE();\r
2034 \r
2035                         declareVarying(varying, var);\r
2036                 }\r
2037 \r
2038                 return var;\r
2039         }\r
2040 \r
2041         void OutputASM::declareVarying(TIntermTyped *varying, int reg)\r
2042         {\r
2043                 if(varying->getQualifier() != EvqPointCoord)   // gl_PointCoord does not need linking\r
2044                 {\r
2045                         const TType &type = varying->getType();\r
2046                         const char *name = varying->getAsSymbolNode()->getSymbol().c_str();\r
2047                         es2::VaryingList &activeVaryings = shaderObject->varyings;\r
2048                         \r
2049                         // Check if this varying has been declared before without having a register assigned\r
2050                         for(es2::VaryingList::iterator v = activeVaryings.begin(); v != activeVaryings.end(); v++)\r
2051                         {\r
2052                                 if(v->name == name)\r
2053                                 {\r
2054                                         if(reg >= 0)\r
2055                                         {\r
2056                                                 ASSERT(v->reg < 0 || v->reg == reg);\r
2057                                                 v->reg = reg;\r
2058                                         }\r
2059 \r
2060                                         return;\r
2061                                 }\r
2062                         }\r
2063                         \r
2064                         activeVaryings.push_back(es2::Varying(glVariableType(type), name, varying->getArraySize(), reg, 0));\r
2065                 }\r
2066         }\r
2067 \r
2068         int OutputASM::uniformRegister(TIntermTyped *uniform)\r
2069         {\r
2070                 const TType &type = uniform->getType();\r
2071                 ASSERT(!IsSampler(type.getBasicType()));\r
2072                 TIntermSymbol *symbol = uniform->getAsSymbolNode();\r
2073                 ASSERT(symbol);\r
2074 \r
2075                 if(symbol)\r
2076                 {\r
2077                         int index = lookup(uniforms, uniform);\r
2078 \r
2079                         if(index == -1)\r
2080                         {\r
2081                                 index = allocate(uniforms, uniform);\r
2082                                 const TString &name = symbol->getSymbol().c_str();\r
2083 \r
2084                                 declareUniform(type, name, index);\r
2085                         }\r
2086 \r
2087                         return index;\r
2088                 }\r
2089 \r
2090                 return 0;\r
2091         }\r
2092 \r
2093         int OutputASM::attributeRegister(TIntermTyped *attribute)\r
2094         {\r
2095                 ASSERT(!attribute->isArray());\r
2096                 ASSERT(attribute->getBasicType() == EbtFloat);\r
2097 \r
2098                 int index = lookup(attributes, attribute);\r
2099 \r
2100                 if(index == -1)\r
2101                 {\r
2102                         TIntermSymbol *symbol = attribute->getAsSymbolNode();\r
2103                         ASSERT(symbol);\r
2104 \r
2105                         if(symbol)\r
2106                         {\r
2107                                 index = allocate(attributes, attribute);\r
2108                                 const TType &type = attribute->getType();\r
2109                                 int registerCount = attribute->totalRegisterCount();\r
2110 \r
2111                                 if(vertexShader && (index + registerCount) <= sw::VertexShader::MAX_INPUT_ATTRIBUTES)\r
2112                                 {\r
2113                                         for(int i = 0; i < registerCount; i++)\r
2114                                         {\r
2115                                                 vertexShader->input[index + i] = sw::Shader::Semantic(sw::Shader::USAGE_TEXCOORD, index + i);\r
2116                                         }\r
2117                                 }\r
2118 \r
2119                                 ActiveAttributes &activeAttributes = shaderObject->activeAttributes;\r
2120 \r
2121                                 const char *name = symbol->getSymbol().c_str();\r
2122                                 activeAttributes.push_back(Attribute(glVariableType(type), name, 0, index));\r
2123                         }\r
2124                 }\r
2125 \r
2126                 return index;\r
2127         }\r
2128 \r
2129         int OutputASM::samplerRegister(TIntermTyped *sampler)\r
2130         {\r
2131                 const TType &type = sampler->getType();\r
2132                 ASSERT(IsSampler(type.getBasicType()));\r
2133                 TIntermSymbol *symbol = sampler->getAsSymbolNode();\r
2134                 TIntermBinary *binary = sampler->getAsBinaryNode();\r
2135 \r
2136                 if(symbol)\r
2137                 {\r
2138                         int index = lookup(samplers, sampler);\r
2139 \r
2140                         if(index == -1)\r
2141                         {\r
2142                                 index = allocate(samplers, sampler);\r
2143                                 ActiveUniforms &activeUniforms = shaderObject->activeUniforms;\r
2144                                 const char *name = symbol->getSymbol().c_str();\r
2145                                 activeUniforms.push_back(Uniform(glVariableType(type), glVariablePrecision(type), name, sampler->getArraySize(), index));\r
2146 \r
2147                                 for(int i = 0; i < sampler->totalRegisterCount(); i++)\r
2148                                 {\r
2149                                         shader->declareSampler(index + i);\r
2150                                 }\r
2151                         }\r
2152 \r
2153                         return index;\r
2154                 }\r
2155                 else if(binary)\r
2156                 {\r
2157                         ASSERT(binary->getOp() == EOpIndexDirect || binary->getOp() == EOpIndexIndirect);\r
2158 \r
2159                         return samplerRegister(binary->getLeft());   // Index added later\r
2160                 }\r
2161                 else UNREACHABLE();\r
2162 \r
2163                 return 0;\r
2164         }\r
2165 \r
2166         int OutputASM::lookup(VariableArray &list, TIntermTyped *variable)\r
2167         {\r
2168                 for(unsigned int i = 0; i < list.size(); i++)\r
2169                 {\r
2170                         if(list[i] == variable)\r
2171                         {\r
2172                                 return i;   // Pointer match\r
2173                         }\r
2174                 }\r
2175 \r
2176                 TIntermSymbol *varSymbol = variable->getAsSymbolNode();\r
2177 \r
2178                 if(varSymbol)\r
2179                 {\r
2180                         for(unsigned int i = 0; i < list.size(); i++)\r
2181                         {\r
2182                                 if(list[i])\r
2183                                 {\r
2184                                         TIntermSymbol *listSymbol = list[i]->getAsSymbolNode();\r
2185 \r
2186                                         if(listSymbol)\r
2187                                         {\r
2188                                                 if(listSymbol->getId() == varSymbol->getId())\r
2189                                                 {\r
2190                                                         ASSERT(listSymbol->getSymbol() == varSymbol->getSymbol());\r
2191                                                         ASSERT(listSymbol->getType() == varSymbol->getType());\r
2192                                                         ASSERT(listSymbol->getQualifier() == varSymbol->getQualifier());\r
2193 \r
2194                                                         return i;\r
2195                                                 }\r
2196                                         }\r
2197                                 }\r
2198                         }\r
2199                 }\r
2200 \r
2201                 return -1;\r
2202         }\r
2203 \r
2204         int OutputASM::allocate(VariableArray &list, TIntermTyped *variable)\r
2205         {\r
2206                 int index = lookup(list, variable);\r
2207 \r
2208                 if(index == -1)\r
2209                 {\r
2210                         unsigned int registerCount = variable->totalRegisterCount();\r
2211 \r
2212                         for(unsigned int i = 0; i < list.size(); i++)\r
2213                         {\r
2214                                 if(list[i] == 0)\r
2215                                 {\r
2216                                         unsigned int j = 1;\r
2217                                         for( ; j < registerCount && (i + j) < list.size(); j++)\r
2218                                         {\r
2219                                                 if(list[i + j] != 0)\r
2220                                                 {\r
2221                                                         break;\r
2222                                                 }\r
2223                                         }\r
2224 \r
2225                                         if(j == registerCount)   // Found free slots\r
2226                                         {\r
2227                                                 for(unsigned int j = 0; j < registerCount; j++)\r
2228                                                 {\r
2229                                                         list[i + j] = variable;\r
2230                                                 }\r
2231 \r
2232                                                 return i;\r
2233                                         }\r
2234                                 }\r
2235                         }\r
2236 \r
2237                         index = list.size();\r
2238 \r
2239                         for(unsigned int i = 0; i < registerCount; i++)\r
2240                         {\r
2241                                 list.push_back(variable);\r
2242                         }\r
2243                 }\r
2244 \r
2245                 return index;\r
2246         }\r
2247 \r
2248         void OutputASM::free(VariableArray &list, TIntermTyped *variable)\r
2249         {\r
2250                 int index = lookup(list, variable);\r
2251 \r
2252                 if(index >= 0)\r
2253                 {\r
2254                         list[index] = 0;\r
2255                 }\r
2256         }\r
2257 \r
2258         void OutputASM::declareUniform(const TType &type, const TString &name, int index)\r
2259         {\r
2260                 const TTypeList *structure = type.getStruct();\r
2261                 ActiveUniforms &activeUniforms = shaderObject->activeUniforms;\r
2262 \r
2263                 if(!structure)\r
2264                 {\r
2265                         activeUniforms.push_back(Uniform(glVariableType(type), glVariablePrecision(type), name.c_str(), type.getArraySize(), index));\r
2266                 }\r
2267                 else\r
2268                 {\r
2269                         if(type.isArray())\r
2270                         {\r
2271                                 int elementIndex = index;\r
2272 \r
2273                                 for(int i = 0; i < type.getArraySize(); i++)\r
2274                                 {\r
2275                                         for(size_t j = 0; j < structure->size(); j++)\r
2276                                         {\r
2277                                                 const TType &fieldType = *(*structure)[j].type;\r
2278                                                 const TString &fieldName = fieldType.getFieldName();\r
2279 \r
2280                                                 const TString uniformName = name + "[" + str(i) + "]." + fieldName;\r
2281                                                 declareUniform(fieldType, uniformName, elementIndex);\r
2282                                                 elementIndex += fieldType.totalRegisterCount();\r
2283                                         }\r
2284                                 }\r
2285                         }\r
2286                         else\r
2287                         {\r
2288                                 int fieldIndex = index;\r
2289 \r
2290                                 for(size_t i = 0; i < structure->size(); i++)\r
2291                                 {\r
2292                                         const TType &fieldType = *(*structure)[i].type;\r
2293                                         const TString &fieldName = fieldType.getFieldName();\r
2294 \r
2295                                         const TString uniformName = name + "." + fieldName;\r
2296                                         declareUniform(fieldType, uniformName, fieldIndex);\r
2297                                         fieldIndex += fieldType.totalRegisterCount();\r
2298                                 }\r
2299                         }\r
2300                 }\r
2301         }\r
2302 \r
2303         GLenum OutputASM::glVariableType(const TType &type)\r
2304         {\r
2305                 if(type.getBasicType() == EbtFloat)\r
2306                 {\r
2307                         if(type.isScalar())\r
2308                         {\r
2309                                 return GL_FLOAT;\r
2310                         }\r
2311                         else if(type.isVector())\r
2312                         {\r
2313                                 switch(type.getNominalSize())\r
2314                                 {\r
2315                                 case 2: return GL_FLOAT_VEC2;\r
2316                                 case 3: return GL_FLOAT_VEC3;\r
2317                                 case 4: return GL_FLOAT_VEC4;\r
2318                                 default: UNREACHABLE();\r
2319                                 }\r
2320                         }\r
2321                         else if(type.isMatrix())\r
2322                         {\r
2323                                 switch(type.getNominalSize())\r
2324                                 {\r
2325                                 case 2: return GL_FLOAT_MAT2;\r
2326                                 case 3: return GL_FLOAT_MAT3;\r
2327                                 case 4: return GL_FLOAT_MAT4;\r
2328                                 default: UNREACHABLE();\r
2329                                 }\r
2330                         }\r
2331                         else UNREACHABLE();\r
2332                 }\r
2333                 else if(type.getBasicType() == EbtInt)\r
2334                 {\r
2335                         if(type.isScalar())\r
2336                         {\r
2337                                 return GL_INT;\r
2338                         }\r
2339                         else if(type.isVector())\r
2340                         {\r
2341                                 switch(type.getNominalSize())\r
2342                                 {\r
2343                                 case 2: return GL_INT_VEC2;\r
2344                                 case 3: return GL_INT_VEC3;\r
2345                                 case 4: return GL_INT_VEC4;\r
2346                                 default: UNREACHABLE();\r
2347                                 }\r
2348                         }\r
2349                         else UNREACHABLE();\r
2350                 }\r
2351                 else if(type.getBasicType() == EbtBool)\r
2352                 {\r
2353                         if(type.isScalar())\r
2354                         {\r
2355                                 return GL_BOOL;\r
2356                         }\r
2357                         else if(type.isVector())\r
2358                         {\r
2359                                 switch(type.getNominalSize())\r
2360                                 {\r
2361                                 case 2: return GL_BOOL_VEC2;\r
2362                                 case 3: return GL_BOOL_VEC3;\r
2363                                 case 4: return GL_BOOL_VEC4;\r
2364                                 default: UNREACHABLE();\r
2365                                 }\r
2366                         }\r
2367                         else UNREACHABLE();\r
2368                 }\r
2369                 else if(type.getBasicType() == EbtSampler2D)\r
2370                 {\r
2371                         return GL_SAMPLER_2D;\r
2372                 }\r
2373                 else if(type.getBasicType() == EbtSamplerCube)\r
2374                 {\r
2375                         return GL_SAMPLER_CUBE;\r
2376                 }\r
2377                 else if(type.getBasicType() == EbtSamplerExternalOES)\r
2378                 {\r
2379                         return GL_SAMPLER_EXTERNAL_OES;\r
2380                 }\r
2381                 else UNREACHABLE();\r
2382 \r
2383                 return GL_NONE;\r
2384         }\r
2385 \r
2386         GLenum OutputASM::glVariablePrecision(const TType &type)\r
2387         {\r
2388                 if(type.getBasicType() == EbtFloat)\r
2389                 {\r
2390                         switch(type.getPrecision())\r
2391                         {\r
2392                         case EbpHigh:   return GL_HIGH_FLOAT;\r
2393                         case EbpMedium: return GL_MEDIUM_FLOAT;\r
2394                         case EbpLow:    return GL_LOW_FLOAT;\r
2395                         case EbpUndefined:\r
2396                                 // Should be defined as the default precision by the parser\r
2397                         default: UNREACHABLE();\r
2398                         }\r
2399                 }\r
2400                 else if(type.getBasicType() == EbtInt)\r
2401                 {\r
2402                         switch (type.getPrecision())\r
2403                         {\r
2404                         case EbpHigh:   return GL_HIGH_INT;\r
2405                         case EbpMedium: return GL_MEDIUM_INT;\r
2406                         case EbpLow:    return GL_LOW_INT;\r
2407                         case EbpUndefined:\r
2408                                 // Should be defined as the default precision by the parser\r
2409                         default: UNREACHABLE();\r
2410                         }\r
2411                 }\r
2412 \r
2413                 // Other types (boolean, sampler) don't have a precision\r
2414                 return GL_NONE;\r
2415         }\r
2416 \r
2417         int OutputASM::dim(TIntermNode *v)\r
2418         {\r
2419                 TIntermTyped *vector = v->getAsTyped();\r
2420                 ASSERT(vector && vector->isRegister());\r
2421                 return vector->getNominalSize();\r
2422         }\r
2423 \r
2424         int OutputASM::dim2(TIntermNode *m)\r
2425         {\r
2426                 TIntermTyped *matrix = m->getAsTyped();\r
2427                 ASSERT(matrix && matrix->isMatrix() && !matrix->isArray());\r
2428                 return matrix->getNominalSize();\r
2429         }\r
2430 \r
2431         // Returns ~0 if no loop count could be determined\r
2432         unsigned int OutputASM::loopCount(TIntermLoop *node)\r
2433         {\r
2434                 // Parse loops of the form:\r
2435                 // for(int index = initial; index [comparator] limit; index += increment)\r
2436                 TIntermSymbol *index = 0;\r
2437                 TOperator comparator = EOpNull;\r
2438                 int initial = 0;\r
2439                 int limit = 0;\r
2440                 int increment = 0;\r
2441 \r
2442                 // Parse index name and intial value\r
2443                 if(node->getInit())\r
2444                 {\r
2445                         TIntermAggregate *init = node->getInit()->getAsAggregate();\r
2446 \r
2447                         if(init)\r
2448                         {\r
2449                                 TIntermSequence &sequence = init->getSequence();\r
2450                                 TIntermTyped *variable = sequence[0]->getAsTyped();\r
2451 \r
2452                                 if(variable && variable->getQualifier() == EvqTemporary)\r
2453                                 {\r
2454                                         TIntermBinary *assign = variable->getAsBinaryNode();\r
2455 \r
2456                                         if(assign->getOp() == EOpInitialize)\r
2457                                         {\r
2458                                                 TIntermSymbol *symbol = assign->getLeft()->getAsSymbolNode();\r
2459                                                 TIntermConstantUnion *constant = assign->getRight()->getAsConstantUnion();\r
2460 \r
2461                                                 if(symbol && constant)\r
2462                                                 {\r
2463                                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2464                                                         {\r
2465                                                                 index = symbol;\r
2466                                                                 initial = constant->getUnionArrayPointer()[0].getIConst();\r
2467                                                         }\r
2468                                                 }\r
2469                                         }\r
2470                                 }\r
2471                         }\r
2472                 }\r
2473 \r
2474                 // Parse comparator and limit value\r
2475                 if(index && node->getCondition())\r
2476                 {\r
2477                         TIntermBinary *test = node->getCondition()->getAsBinaryNode();\r
2478 \r
2479                         if(test && test->getLeft()->getAsSymbolNode()->getId() == index->getId())\r
2480                         {\r
2481                                 TIntermConstantUnion *constant = test->getRight()->getAsConstantUnion();\r
2482 \r
2483                                 if(constant)\r
2484                                 {\r
2485                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2486                                         {\r
2487                                                 comparator = test->getOp();\r
2488                                                 limit = constant->getUnionArrayPointer()[0].getIConst();\r
2489                                         }\r
2490                                 }\r
2491                         }\r
2492                 }\r
2493 \r
2494                 // Parse increment\r
2495                 if(index && comparator != EOpNull && node->getExpression())\r
2496                 {\r
2497                         TIntermBinary *binaryTerminal = node->getExpression()->getAsBinaryNode();\r
2498                         TIntermUnary *unaryTerminal = node->getExpression()->getAsUnaryNode();\r
2499 \r
2500                         if(binaryTerminal)\r
2501                         {\r
2502                                 TOperator op = binaryTerminal->getOp();\r
2503                                 TIntermConstantUnion *constant = binaryTerminal->getRight()->getAsConstantUnion();\r
2504 \r
2505                                 if(constant)\r
2506                                 {\r
2507                                         if(constant->getBasicType() == EbtInt && constant->getNominalSize() == 1)\r
2508                                         {\r
2509                                                 int value = constant->getUnionArrayPointer()[0].getIConst();\r
2510 \r
2511                                                 switch(op)\r
2512                                                 {\r
2513                                                 case EOpAddAssign: increment = value;  break;\r
2514                                                 case EOpSubAssign: increment = -value; break;\r
2515                                                 default: UNIMPLEMENTED();\r
2516                                                 }\r
2517                                         }\r
2518                                 }\r
2519                         }\r
2520                         else if(unaryTerminal)\r
2521                         {\r
2522                                 TOperator op = unaryTerminal->getOp();\r
2523 \r
2524                                 switch(op)\r
2525                                 {\r
2526                                 case EOpPostIncrement: increment = 1;  break;\r
2527                                 case EOpPostDecrement: increment = -1; break;\r
2528                                 case EOpPreIncrement:  increment = 1;  break;\r
2529                                 case EOpPreDecrement:  increment = -1; break;\r
2530                                 default: UNIMPLEMENTED();\r
2531                                 }\r
2532                         }\r
2533                 }\r
2534 \r
2535                 if(index && comparator != EOpNull && increment != 0)\r
2536                 {\r
2537                         if(comparator == EOpLessThanEqual)\r
2538                         {\r
2539                                 comparator = EOpLessThan;\r
2540                                 limit += 1;\r
2541                         }\r
2542 \r
2543                         if(comparator == EOpLessThan)\r
2544                         {\r
2545                                 int iterations = (limit - initial) / increment;\r
2546 \r
2547                                 if(iterations <= 0)\r
2548                                 {\r
2549                                         iterations = 0;\r
2550                                 }\r
2551 \r
2552                                 return iterations;\r
2553                         }\r
2554                         else UNIMPLEMENTED();   // Falls through\r
2555                 }\r
2556 \r
2557                 return ~0;\r
2558         }\r
2559 \r
2560         bool DetectLoopDiscontinuity::traverse(TIntermNode *node)\r
2561         {\r
2562                 loopDepth = 0;\r
2563                 loopDiscontinuity = false;\r
2564                 \r
2565                 node->traverse(this);\r
2566                 \r
2567                 return loopDiscontinuity;\r
2568         }\r
2569 \r
2570         bool DetectLoopDiscontinuity::visitLoop(Visit visit, TIntermLoop *loop)\r
2571         {\r
2572                 if(visit == PreVisit)\r
2573                 {\r
2574                         loopDepth++;\r
2575                 }\r
2576                 else if(visit == PostVisit)\r
2577                 {\r
2578                         loopDepth++;\r
2579                 }\r
2580 \r
2581                 return true;\r
2582         }\r
2583 \r
2584         bool DetectLoopDiscontinuity::visitBranch(Visit visit, TIntermBranch *node)\r
2585         {\r
2586                 if(loopDiscontinuity)\r
2587                 {\r
2588                         return false;\r
2589                 }\r
2590 \r
2591                 if(!loopDepth)\r
2592                 {\r
2593                         return true;\r
2594                 }\r
2595         \r
2596                 switch(node->getFlowOp())\r
2597                 {\r
2598                 case EOpKill:\r
2599                         break;\r
2600                 case EOpBreak:\r
2601                 case EOpContinue:\r
2602                 case EOpReturn:\r
2603                         loopDiscontinuity = true;\r
2604                         break;\r
2605                 default: UNREACHABLE();\r
2606                 }\r
2607 \r
2608                 return !loopDiscontinuity;\r
2609         }\r
2610 \r
2611         bool DetectLoopDiscontinuity::visitAggregate(Visit visit, TIntermAggregate *node)\r
2612         {\r
2613                 return !loopDiscontinuity;\r
2614         }\r
2615 }\r