src/OpenGL/compiler/OutputASM.cpp

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