src/OpenGL/compiler/OutputASM.cpp

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