src/gallium/drivers/swr/rasterizer/jitter/builder_misc.cpp

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  22 *
  23 * @file builder_misc.cpp
  24 *
  25 * @brief Implementation for miscellaneous builder functions
  26 *
  27 * Notes:
  28 *
  29 ******************************************************************************/
  30 #include "builder.h"
  31 #include "common/rdtsc_buckets.h"
  32
  33 #include <cstdarg>
  34
  35 namespace SwrJit
  36 {
  37     void __cdecl CallPrint(const char* fmt, ...);
  38
  39     //////////////////////////////////////////////////////////////////////////
  40     /// @brief Convert an IEEE 754 32-bit single precision float to an
  41     ///        16 bit float with 5 exponent bits and a variable
  42     ///        number of mantissa bits.
  43     /// @param val - 32-bit float
  44     /// @todo Maybe move this outside of this file into a header?
  45     static uint16_t Convert32To16Float(float val)
  46     {
  47         uint32_t sign, exp, mant;
  48         uint32_t roundBits;
  49
  50         // Extract the sign, exponent, and mantissa
  51         uint32_t uf = *(uint32_t*)&val;
  52         sign = (uf & 0x80000000) >> 31;
  53         exp = (uf & 0x7F800000) >> 23;
  54         mant = uf & 0x007FFFFF;
  55
  56         // Check for out of range
  57         if (std::isnan(val))
  58         {
  59             exp = 0x1F;
  60             mant = 0x200;
  61             sign = 1;                     // set the sign bit for NANs
  62         }
  63         else if (std::isinf(val))
  64         {
  65             exp = 0x1f;
  66             mant = 0x0;
  67         }
  68         else if (exp > (0x70 + 0x1E)) // Too big to represent -> max representable value
  69         {
  70             exp = 0x1E;
  71             mant = 0x3FF;
  72         }
  73         else if ((exp <= 0x70) && (exp >= 0x66)) // It's a denorm
  74         {
  75             mant |= 0x00800000;
  76             for (; exp <= 0x70; mant >>= 1, exp++)
  77                 ;
  78             exp = 0;
  79             mant = mant >> 13;
  80         }
  81         else if (exp < 0x66) // Too small to represent -> Zero
  82         {
  83             exp = 0;
  84             mant = 0;
  85         }
  86         else
  87         {
  88             // Saves bits that will be shifted off for rounding
  89             roundBits = mant & 0x1FFFu;
  90             // convert exponent and mantissa to 16 bit format
  91             exp = exp - 0x70;
  92             mant = mant >> 13;
  93
  94             // Essentially RTZ, but round up if off by only 1 lsb
  95             if (roundBits == 0x1FFFu)
  96             {
  97                 mant++;
  98                 // check for overflow
  99                 if ((mant & 0xC00u) != 0)
 100                     exp++;
 101                 // make sure only the needed bits are used
 102                 mant &= 0x3FF;
 103             }
 104         }
 105
 106         uint32_t tmpVal = (sign << 15) | (exp << 10) | mant;
 107         return (uint16_t)tmpVal;
 108     }
 109
 110     //////////////////////////////////////////////////////////////////////////
 111     /// @brief Convert an IEEE 754 16-bit float to an 32-bit single precision
 112     ///        float
 113     /// @param val - 16-bit float
 114     /// @todo Maybe move this outside of this file into a header?
 115     static float ConvertSmallFloatTo32(UINT val)
 116     {
 117         UINT result;
 118         if ((val & 0x7fff) == 0)
 119         {
 120             result = ((uint32_t)(val & 0x8000)) << 16;
 121         }
 122         else if ((val & 0x7c00) == 0x7c00)
 123         {
 124             result = ((val & 0x3ff) == 0) ? 0x7f800000 : 0x7fc00000;
 125             result |= ((uint32_t)val & 0x8000) << 16;
 126         }
 127         else
 128         {
 129             uint32_t sign = (val & 0x8000) << 16;
 130             uint32_t mant = (val & 0x3ff) << 13;
 131             uint32_t exp = (val >> 10) & 0x1f;
 132             if ((exp == 0) && (mant != 0)) // Adjust exponent and mantissa for denormals
 133             {
 134                 mant <<= 1;
 135                 while (mant < (0x400 << 13))
 136                 {
 137                     exp--;
 138                     mant <<= 1;
 139                 }
 140                 mant &= (0x3ff << 13);
 141             }
 142             exp = ((exp - 15 + 127) & 0xff) << 23;
 143             result = sign | exp | mant;
 144         }
 145
 146         return *(float*)&result;
 147     }
 148
 149     Constant *Builder::C(bool i)
 150     {
 151         return ConstantInt::get(IRB()->getInt1Ty(), (i ? 1 : 0));
 152     }
 153
 154     Constant *Builder::C(char i)
 155     {
 156         return ConstantInt::get(IRB()->getInt8Ty(), i);
 157     }
 158
 159     Constant *Builder::C(uint8_t i)
 160     {
 161         return ConstantInt::get(IRB()->getInt8Ty(), i);
 162     }
 163
 164     Constant *Builder::C(int i)
 165     {
 166         return ConstantInt::get(IRB()->getInt32Ty(), i);
 167     }
 168
 169     Constant *Builder::C(int64_t i)
 170     {
 171         return ConstantInt::get(IRB()->getInt64Ty(), i);
 172     }
 173
 174     Constant *Builder::C(uint16_t i)
 175     {
 176         return ConstantInt::get(mInt16Ty,i);
 177     }
 178
 179     Constant *Builder::C(uint32_t i)
 180     {
 181         return ConstantInt::get(IRB()->getInt32Ty(), i);
 182     }
 183
 184     Constant *Builder::C(float i)
 185     {
 186         return ConstantFP::get(IRB()->getFloatTy(), i);
 187     }
 188
 189     Constant *Builder::PRED(bool pred)
 190     {
 191         return ConstantInt::get(IRB()->getInt1Ty(), (pred ? 1 : 0));
 192     }
 193
 194     Value *Builder::VIMMED1(int i)
 195     {
 196         return ConstantVector::getSplat(mVWidth, cast<ConstantInt>(C(i)));
 197     }
 198
 199     Value *Builder::VIMMED1(uint32_t i)
 200     {
 201         return ConstantVector::getSplat(mVWidth, cast<ConstantInt>(C(i)));
 202     }
 203
 204     Value *Builder::VIMMED1(float i)
 205     {
 206         return ConstantVector::getSplat(mVWidth, cast<ConstantFP>(C(i)));
 207     }
 208
 209     Value *Builder::VIMMED1(bool i)
 210     {
 211         return ConstantVector::getSplat(mVWidth, cast<ConstantInt>(C(i)));
 212     }
 213
 214     Value *Builder::VUNDEF_IPTR()
 215     {
 216         return UndefValue::get(VectorType::get(mInt32PtrTy,mVWidth));
 217     }
 218
 219     Value *Builder::VUNDEF_I()
 220     {
 221         return UndefValue::get(VectorType::get(mInt32Ty, mVWidth));
 222     }
 223
 224     Value *Builder::VUNDEF(Type *ty, uint32_t size)
 225     {
 226         return UndefValue::get(VectorType::get(ty, size));
 227     }
 228
 229     Value *Builder::VUNDEF_F()
 230     {
 231         return UndefValue::get(VectorType::get(mFP32Ty, mVWidth));
 232     }
 233
 234     Value *Builder::VUNDEF(Type* t)
 235     {
 236         return UndefValue::get(VectorType::get(t, mVWidth));
 237     }
 238
 239     #if HAVE_LLVM == 0x306
 240     Value *Builder::VINSERT(Value *vec, Value *val, uint64_t index)
 241     {
 242         return VINSERT(vec, val, C((int64_t)index));
 243     }
 244     #endif
 245
 246     Value *Builder::VBROADCAST(Value *src)
 247     {
 248         // check if src is already a vector
 249         if (src->getType()->isVectorTy())
 250         {
 251             return src;
 252         }
 253
 254         return VECTOR_SPLAT(mVWidth, src);
 255     }
 256
 257     uint32_t Builder::IMMED(Value* v)
 258     {
 259         SWR_ASSERT(isa<ConstantInt>(v));
 260         ConstantInt *pValConst = cast<ConstantInt>(v);
 261         return pValConst->getZExtValue();
 262     }
 263
 264     int32_t Builder::S_IMMED(Value* v)
 265     {
 266         SWR_ASSERT(isa<ConstantInt>(v));
 267         ConstantInt *pValConst = cast<ConstantInt>(v);
 268         return pValConst->getSExtValue();
 269     }
 270
 271     Value *Builder::GEP(Value* ptr, const std::initializer_list<Value*> &indexList)
 272     {
 273         std::vector<Value*> indices;
 274         for (auto i : indexList)
 275             indices.push_back(i);
 276         return GEPA(ptr, indices);
 277     }
 278
 279     Value *Builder::GEP(Value* ptr, const std::initializer_list<uint32_t> &indexList)
 280     {
 281         std::vector<Value*> indices;
 282         for (auto i : indexList)
 283             indices.push_back(C(i));
 284         return GEPA(ptr, indices);
 285     }
 286
 287     LoadInst *Builder::LOAD(Value *basePtr, const std::initializer_list<uint32_t> &indices, const llvm::Twine& name)
 288     {
 289         std::vector<Value*> valIndices;
 290         for (auto i : indices)
 291             valIndices.push_back(C(i));
 292         return LOAD(GEPA(basePtr, valIndices), name);
 293     }
 294
 295     LoadInst *Builder::LOADV(Value *basePtr, const std::initializer_list<Value*> &indices, const llvm::Twine& name)
 296     {
 297         std::vector<Value*> valIndices;
 298         for (auto i : indices)
 299             valIndices.push_back(i);
 300         return LOAD(GEPA(basePtr, valIndices), name);
 301     }
 302
 303     StoreInst *Builder::STORE(Value *val, Value *basePtr, const std::initializer_list<uint32_t> &indices)
 304     {
 305         std::vector<Value*> valIndices;
 306         for (auto i : indices)
 307             valIndices.push_back(C(i));
 308         return STORE(val, GEPA(basePtr, valIndices));
 309     }
 310
 311     StoreInst *Builder::STOREV(Value *val, Value *basePtr, const std::initializer_list<Value*> &indices)
 312     {
 313         std::vector<Value*> valIndices;
 314         for (auto i : indices)
 315             valIndices.push_back(i);
 316         return STORE(val, GEPA(basePtr, valIndices));
 317     }
 318
 319     CallInst *Builder::CALL(Value *Callee, const std::initializer_list<Value*> &argsList)
 320     {
 321         std::vector<Value*> args;
 322         for (auto arg : argsList)
 323             args.push_back(arg);
 324         return CALLA(Callee, args);
 325     }
 326
 327     #if HAVE_LLVM > 0x306
 328     CallInst *Builder::CALL(Value *Callee, Value* arg)
 329     {
 330         std::vector<Value*> args;
 331         args.push_back(arg);
 332         return CALLA(Callee, args);
 333     }
 334
 335     CallInst *Builder::CALL2(Value *Callee, Value* arg1, Value* arg2)
 336     {
 337         std::vector<Value*> args;
 338         args.push_back(arg1);
 339         args.push_back(arg2);
 340         return CALLA(Callee, args);
 341     }
 342
 343     CallInst *Builder::CALL3(Value *Callee, Value* arg1, Value* arg2, Value* arg3)
 344     {
 345         std::vector<Value*> args;
 346         args.push_back(arg1);
 347         args.push_back(arg2);
 348         args.push_back(arg3);
 349         return CALLA(Callee, args);
 350     }
 351     #endif
 352
 353     Value *Builder::VRCP(Value *va)
 354     {
 355         return FDIV(VIMMED1(1.0f), va);  // 1 / a
 356     }
 357
 358     Value *Builder::VPLANEPS(Value* vA, Value* vB, Value* vC, Value* &vX, Value* &vY)
 359     {
 360         Value* vOut = FMADDPS(vA, vX, vC);
 361         vOut = FMADDPS(vB, vY, vOut);
 362         return vOut;
 363     }
 364
 365     //////////////////////////////////////////////////////////////////////////
 366     /// @brief Generate an i32 masked load operation in LLVM IR.  If not
 367     /// supported on the underlying platform, emulate it with float masked load
 368     /// @param src - base address pointer for the load
 369     /// @param vMask - SIMD wide mask that controls whether to access memory load 0
 370     Value *Builder::MASKLOADD(Value* src,Value* mask)
 371     {
 372         Value* vResult;
 373         // use avx2 gather instruction is available
 374         if(JM()->mArch.AVX2())
 375         {
 376             Function *func = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_avx2_maskload_d_256);
 377             vResult = CALL(func,{src,mask});
 378         }
 379         else
 380         {
 381             // maskload intrinsic expects integer mask operand in llvm >= 3.8
 382     #if (LLVM_VERSION_MAJOR > 3) || (LLVM_VERSION_MAJOR == 3 && LLVM_VERSION_MINOR >= 8)
 383             mask = BITCAST(mask,VectorType::get(mInt32Ty,mVWidth));
 384     #else
 385             mask = BITCAST(mask,VectorType::get(mFP32Ty,mVWidth));
 386     #endif
 387             Function *func = Intrinsic::getDeclaration(JM()->mpCurrentModule,Intrinsic::x86_avx_maskload_ps_256);
 388             vResult = BITCAST(CALL(func,{src,mask}), VectorType::get(mInt32Ty,mVWidth));
 389         }
 390         return vResult;
 391     }
 392
 393     //////////////////////////////////////////////////////////////////////////
 394     /// @brief insert a JIT call to CallPrint
 395     /// - outputs formatted string to both stdout and VS output window
 396     /// - DEBUG builds only
 397     /// Usage example:
 398     ///   PRINT("index %d = 0x%p\n",{C(lane), pIndex});
 399     ///   where C(lane) creates a constant value to print, and pIndex is the Value*
 400     ///   result from a GEP, printing out the pointer to memory
 401     /// @param printStr - constant string to print, which includes format specifiers
 402     /// @param printArgs - initializer list of Value*'s to print to std out
 403     CallInst *Builder::PRINT(const std::string &printStr,const std::initializer_list<Value*> &printArgs)
 404     {
 405         // push the arguments to CallPrint into a vector
 406         std::vector<Value*> printCallArgs;
 407         // save room for the format string.  we still need to modify it for vectors
 408         printCallArgs.resize(1);
 409
 410         // search through the format string for special processing
 411         size_t pos = 0;
 412         std::string tempStr(printStr);
 413         pos = tempStr.find('%', pos);
 414         auto v = printArgs.begin();
 415
 416         while ((pos != std::string::npos) && (v != printArgs.end()))
 417         {
 418             Value* pArg = *v;
 419             Type* pType = pArg->getType();
 420
 421             if (pType->isVectorTy())
 422             {
 423                 Type* pContainedType = pType->getContainedType(0);
 424
 425                 if (toupper(tempStr[pos + 1]) == 'X')
 426                 {
 427                     tempStr[pos] = '0';
 428                     tempStr[pos + 1] = 'x';
 429                     tempStr.insert(pos + 2, "%08X ");
 430                     pos += 7;
 431
 432                     printCallArgs.push_back(VEXTRACT(pArg, C(0)));
 433
 434                     std::string vectorFormatStr;
 435                     for (uint32_t i = 1; i < pType->getVectorNumElements(); ++i)
 436                     {
 437                         vectorFormatStr += "0x%08X ";
 438                         printCallArgs.push_back(VEXTRACT(pArg, C(i)));
 439                     }
 440
 441                     tempStr.insert(pos, vectorFormatStr);
 442                     pos += vectorFormatStr.size();
 443                 }
 444                 else if ((tempStr[pos + 1] == 'f') && (pContainedType->isFloatTy()))
 445                 {
 446                     uint32_t i = 0;
 447                     for (; i < (pArg->getType()->getVectorNumElements()) - 1; i++)
 448                     {
 449                         tempStr.insert(pos, std::string("%f "));
 450                         pos += 3;
 451                         printCallArgs.push_back(FP_EXT(VEXTRACT(pArg, C(i)), Type::getDoubleTy(JM()->mContext)));
 452                     }
 453                     printCallArgs.push_back(FP_EXT(VEXTRACT(pArg, C(i)), Type::getDoubleTy(JM()->mContext)));
 454                 }
 455                 else if ((tempStr[pos + 1] == 'd') && (pContainedType->isIntegerTy()))
 456                 {
 457                     uint32_t i = 0;
 458                     for (; i < (pArg->getType()->getVectorNumElements()) - 1; i++)
 459                     {
 460                         tempStr.insert(pos, std::string("%d "));
 461                         pos += 3;
 462                         printCallArgs.push_back(VEXTRACT(pArg, C(i)));
 463                     }
 464                     printCallArgs.push_back(VEXTRACT(pArg, C(i)));
 465                 }
 466             }
 467             else
 468             {
 469                 if (toupper(tempStr[pos + 1]) == 'X')
 470                 {
 471                     tempStr[pos] = '0';
 472                     tempStr.insert(pos + 1, "x%08");
 473                     printCallArgs.push_back(pArg);
 474                     pos += 3;
 475                 }
 476                 // for %f we need to cast float Values to doubles so that they print out correctly
 477                 else if ((tempStr[pos + 1] == 'f') && (pType->isFloatTy()))
 478                 {
 479                     printCallArgs.push_back(FP_EXT(pArg, Type::getDoubleTy(JM()->mContext)));
 480                     pos++;
 481                 }
 482                 else
 483                 {
 484                     printCallArgs.push_back(pArg);
 485                 }
 486             }
 487
 488             // advance to the next arguement
 489             v++;
 490             pos = tempStr.find('%', ++pos);
 491         }
 492
 493         // create global variable constant string
 494         Constant *constString = ConstantDataArray::getString(JM()->mContext,tempStr,true);
 495         GlobalVariable *gvPtr = new GlobalVariable(constString->getType(),true,GlobalValue::InternalLinkage,constString,"printStr");
 496         JM()->mpCurrentModule->getGlobalList().push_back(gvPtr);
 497
 498         // get a pointer to the first character in the constant string array
 499         std::vector<Constant*> geplist{C(0),C(0)};
 500     #if HAVE_LLVM == 0x306
 501         Constant *strGEP = ConstantExpr::getGetElementPtr(gvPtr,geplist,false);
 502     #else
 503         Constant *strGEP = ConstantExpr::getGetElementPtr(nullptr, gvPtr,geplist,false);
 504     #endif
 505
 506         // insert the pointer to the format string in the argument vector
 507         printCallArgs[0] = strGEP;
 508
 509         // get pointer to CallPrint function and insert decl into the module if needed
 510         std::vector<Type*> args;
 511         args.push_back(PointerType::get(mInt8Ty,0));
 512         FunctionType* callPrintTy = FunctionType::get(Type::getVoidTy(JM()->mContext),args,true);
 513         Function *callPrintFn = cast<Function>(JM()->mpCurrentModule->getOrInsertFunction("CallPrint", callPrintTy));
 514
 515         // if we haven't yet added the symbol to the symbol table
 516         if((sys::DynamicLibrary::SearchForAddressOfSymbol("CallPrint")) == nullptr)
 517         {
 518             sys::DynamicLibrary::AddSymbol("CallPrint", (void *)&CallPrint);
 519         }
 520
 521         // insert a call to CallPrint
 522         return CALLA(callPrintFn,printCallArgs);
 523     }
 524
 525     //////////////////////////////////////////////////////////////////////////
 526     /// @brief Wrapper around PRINT with initializer list.
 527     CallInst* Builder::PRINT(const std::string &printStr)
 528     {
 529         return PRINT(printStr, {});
 530     }
 531
 532     //////////////////////////////////////////////////////////////////////////
 533     /// @brief Generate a masked gather operation in LLVM IR.  If not
 534     /// supported on the underlying platform, emulate it with loads
 535     /// @param vSrc - SIMD wide value that will be loaded if mask is invalid
 536     /// @param pBase - Int8* base VB address pointer value
 537     /// @param vIndices - SIMD wide value of VB byte offsets
 538     /// @param vMask - SIMD wide mask that controls whether to access memory or the src values
 539     /// @param scale - value to scale indices by
 540     Value *Builder::GATHERPS(Value* vSrc, Value* pBase, Value* vIndices, Value* vMask, Value* scale)
 541     {
 542         Value* vGather;
 543
 544         // use avx2 gather instruction if available
 545         if(JM()->mArch.AVX2())
 546         {
 547             // force mask to <N x float>, required by vgather
 548             vMask = BITCAST(vMask, mSimdFP32Ty);
 549             vGather = VGATHERPS(vSrc,pBase,vIndices,vMask,scale);
 550         }
 551         else
 552         {
 553             Value* pStack = STACKSAVE();
 554
 555             // store vSrc on the stack.  this way we can select between a valid load address and the vSrc address
 556             Value* vSrcPtr = ALLOCA(vSrc->getType());
 557             STORE(vSrc, vSrcPtr);
 558
 559             vGather = VUNDEF_F();
 560             Value *vScaleVec = VBROADCAST(Z_EXT(scale,mInt32Ty));
 561             Value *vOffsets = MUL(vIndices,vScaleVec);
 562             Value *mask = MASK(vMask);
 563             for(uint32_t i = 0; i < mVWidth; ++i)
 564             {
 565                 // single component byte index
 566                 Value *offset = VEXTRACT(vOffsets,C(i));
 567                 // byte pointer to component
 568                 Value *loadAddress = GEP(pBase,offset);
 569                 loadAddress = BITCAST(loadAddress,PointerType::get(mFP32Ty,0));
 570                 // pointer to the value to load if we're masking off a component
 571                 Value *maskLoadAddress = GEP(vSrcPtr,{C(0), C(i)});
 572                 Value *selMask = VEXTRACT(mask,C(i));
 573                 // switch in a safe address to load if we're trying to access a vertex
 574                 Value *validAddress = SELECT(selMask, loadAddress, maskLoadAddress);
 575                 Value *val = LOAD(validAddress);
 576                 vGather = VINSERT(vGather,val,C(i));
 577             }
 578             STACKRESTORE(pStack);
 579         }
 580
 581         return vGather;
 582     }
 583
 584     //////////////////////////////////////////////////////////////////////////
 585     /// @brief Generate a masked gather operation in LLVM IR.  If not
 586     /// supported on the underlying platform, emulate it with loads
 587     /// @param vSrc - SIMD wide value that will be loaded if mask is invalid
 588     /// @param pBase - Int8* base VB address pointer value
 589     /// @param vIndices - SIMD wide value of VB byte offsets
 590     /// @param vMask - SIMD wide mask that controls whether to access memory or the src values
 591     /// @param scale - value to scale indices by
 592     Value *Builder::GATHERDD(Value* vSrc, Value* pBase, Value* vIndices, Value* vMask, Value* scale)
 593     {
 594         Value* vGather;
 595
 596         // use avx2 gather instruction if available
 597         if(JM()->mArch.AVX2())
 598         {
 599             vGather = VGATHERDD(vSrc, pBase, vIndices, vMask, scale);
 600         }
 601         else
 602         {
 603             Value* pStack = STACKSAVE();
 604
 605             // store vSrc on the stack.  this way we can select between a valid load address and the vSrc address
 606             Value* vSrcPtr = ALLOCA(vSrc->getType());
 607             STORE(vSrc, vSrcPtr);
 608
 609             vGather = VUNDEF_I();
 610             Value *vScaleVec = VBROADCAST(Z_EXT(scale, mInt32Ty));
 611             Value *vOffsets = MUL(vIndices, vScaleVec);
 612             Value *mask = MASK(vMask);
 613             for(uint32_t i = 0; i < mVWidth; ++i)
 614             {
 615                 // single component byte index
 616                 Value *offset = VEXTRACT(vOffsets, C(i));
 617                 // byte pointer to component
 618                 Value *loadAddress = GEP(pBase, offset);
 619                 loadAddress = BITCAST(loadAddress, PointerType::get(mInt32Ty, 0));
 620                 // pointer to the value to load if we're masking off a component
 621                 Value *maskLoadAddress = GEP(vSrcPtr, {C(0), C(i)});
 622                 Value *selMask = VEXTRACT(mask, C(i));
 623                 // switch in a safe address to load if we're trying to access a vertex
 624                 Value *validAddress = SELECT(selMask, loadAddress, maskLoadAddress);
 625                 Value *val = LOAD(validAddress, C(0));
 626                 vGather = VINSERT(vGather, val, C(i));
 627             }
 628
 629             STACKRESTORE(pStack);
 630         }
 631         return vGather;
 632     }
 633
 634     //////////////////////////////////////////////////////////////////////////
 635     /// @brief Generate a masked gather operation in LLVM IR.  If not
 636     /// supported on the underlying platform, emulate it with loads
 637     /// @param vSrc - SIMD wide value that will be loaded if mask is invalid
 638     /// @param pBase - Int8* base VB address pointer value
 639     /// @param vIndices - SIMD wide value of VB byte offsets
 640     /// @param vMask - SIMD wide mask that controls whether to access memory or the src values
 641     /// @param scale - value to scale indices by
 642     Value *Builder::GATHERPD(Value* vSrc, Value* pBase, Value* vIndices, Value* vMask, Value* scale)
 643     {
 644         Value* vGather;
 645
 646         // use avx2 gather instruction if available
 647         if(JM()->mArch.AVX2())
 648         {
 649             vGather = VGATHERPD(vSrc, pBase, vIndices, vMask, scale);
 650         }
 651         else
 652         {
 653             Value* pStack = STACKSAVE();
 654
 655             // store vSrc on the stack.  this way we can select between a valid load address and the vSrc address
 656             Value* vSrcPtr = ALLOCA(vSrc->getType());
 657             STORE(vSrc, vSrcPtr);
 658
 659             vGather = UndefValue::get(VectorType::get(mDoubleTy, 4));
 660             Value *vScaleVec = VECTOR_SPLAT(4, Z_EXT(scale,mInt32Ty));
 661             Value *vOffsets = MUL(vIndices,vScaleVec);
 662             Value *mask = MASK(vMask);
 663             for(uint32_t i = 0; i < mVWidth/2; ++i)
 664             {
 665                 // single component byte index
 666                 Value *offset = VEXTRACT(vOffsets,C(i));
 667                 // byte pointer to component
 668                 Value *loadAddress = GEP(pBase,offset);
 669                 loadAddress = BITCAST(loadAddress,PointerType::get(mDoubleTy,0));
 670                 // pointer to the value to load if we're masking off a component
 671                 Value *maskLoadAddress = GEP(vSrcPtr,{C(0), C(i)});
 672                 Value *selMask = VEXTRACT(mask,C(i));
 673                 // switch in a safe address to load if we're trying to access a vertex
 674                 Value *validAddress = SELECT(selMask, loadAddress, maskLoadAddress);
 675                 Value *val = LOAD(validAddress);
 676                 vGather = VINSERT(vGather,val,C(i));
 677             }
 678             STACKRESTORE(pStack);
 679         }
 680         return vGather;
 681     }
 682
 683     //////////////////////////////////////////////////////////////////////////
 684     /// @brief convert x86 <N x float> mask to llvm <N x i1> mask
 685     Value* Builder::MASK(Value* vmask)
 686     {
 687         Value* src = BITCAST(vmask, mSimdInt32Ty);
 688         return ICMP_SLT(src, VIMMED1(0));
 689     }
 690
 691     //////////////////////////////////////////////////////////////////////////
 692     /// @brief convert llvm <N x i1> mask to x86 <N x i32> mask
 693     Value* Builder::VMASK(Value* mask)
 694     {
 695         return S_EXT(mask, mSimdInt32Ty);
 696     }
 697
 698     //////////////////////////////////////////////////////////////////////////
 699     /// @brief Generate a VPSHUFB operation in LLVM IR.  If not
 700     /// supported on the underlying platform, emulate it
 701     /// @param a - 256bit SIMD(32x8bit) of 8bit integer values
 702     /// @param b - 256bit SIMD(32x8bit) of 8bit integer mask values
 703     /// Byte masks in lower 128 lane of b selects 8 bit values from lower
 704     /// 128bits of a, and vice versa for the upper lanes.  If the mask
 705     /// value is negative, '0' is inserted.
 706     Value *Builder::PSHUFB(Value* a, Value* b)
 707     {
 708         Value* res;
 709         // use avx2 pshufb instruction if available
 710         if(JM()->mArch.AVX2())
 711         {
 712             res = VPSHUFB(a, b);
 713         }
 714         else
 715         {
 716             Constant* cB = dyn_cast<Constant>(b);
 717             // number of 8 bit elements in b
 718             uint32_t numElms = cast<VectorType>(cB->getType())->getNumElements();
 719             // output vector
 720             Value* vShuf = UndefValue::get(VectorType::get(mInt8Ty, numElms));
 721
 722             // insert an 8 bit value from the high and low lanes of a per loop iteration
 723             numElms /= 2;
 724             for(uint32_t i = 0; i < numElms; i++)
 725             {
 726                 ConstantInt* cLow128b = cast<ConstantInt>(cB->getAggregateElement(i));
 727                 ConstantInt* cHigh128b = cast<ConstantInt>(cB->getAggregateElement(i + numElms));
 728
 729                 // extract values from constant mask
 730                 char valLow128bLane =  (char)(cLow128b->getSExtValue());
 731                 char valHigh128bLane = (char)(cHigh128b->getSExtValue());
 732
 733                 Value* insertValLow128b;
 734                 Value* insertValHigh128b;
 735
 736                 // if the mask value is negative, insert a '0' in the respective output position
 737                 // otherwise, lookup the value at mask position (bits 3..0 of the respective mask byte) in a and insert in output vector
 738                 insertValLow128b = (valLow128bLane < 0) ? C((char)0) : VEXTRACT(a, C((valLow128bLane & 0xF)));
 739                 insertValHigh128b = (valHigh128bLane < 0) ? C((char)0) : VEXTRACT(a, C((valHigh128bLane & 0xF) + numElms));
 740
 741                 vShuf = VINSERT(vShuf, insertValLow128b, i);
 742                 vShuf = VINSERT(vShuf, insertValHigh128b, (i + numElms));
 743             }
 744             res = vShuf;
 745         }
 746         return res;
 747     }
 748
 749     //////////////////////////////////////////////////////////////////////////
 750     /// @brief Generate a VPSHUFB operation (sign extend 8 8bit values to 32
 751     /// bits)in LLVM IR.  If not supported on the underlying platform, emulate it
 752     /// @param a - 128bit SIMD lane(16x8bit) of 8bit integer values.  Only
 753     /// lower 8 values are used.
 754     Value *Builder::PMOVSXBD(Value* a)
 755     {
 756         // llvm-3.9 removed the pmovsxbd intrinsic
 757     #if HAVE_LLVM < 0x309
 758         // use avx2 byte sign extend instruction if available
 759         if(JM()->mArch.AVX2())
 760         {
 761             Function *pmovsxbd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_avx2_pmovsxbd);
 762             return CALL(pmovsxbd, std::initializer_list<Value*>{a});
 763         }
 764         else
 765     #endif
 766         {
 767             // VPMOVSXBD output type
 768             Type* v8x32Ty = VectorType::get(mInt32Ty, 8);
 769             // Extract 8 values from 128bit lane and sign extend
 770             return S_EXT(VSHUFFLE(a, a, C<int>({0, 1, 2, 3, 4, 5, 6, 7})), v8x32Ty);
 771         }
 772     }
 773
 774     //////////////////////////////////////////////////////////////////////////
 775     /// @brief Generate a VPSHUFB operation (sign extend 8 16bit values to 32
 776     /// bits)in LLVM IR.  If not supported on the underlying platform, emulate it
 777     /// @param a - 128bit SIMD lane(8x16bit) of 16bit integer values.
 778     Value *Builder::PMOVSXWD(Value* a)
 779     {
 780         // llvm-3.9 removed the pmovsxwd intrinsic
 781     #if HAVE_LLVM < 0x309
 782         // use avx2 word sign extend if available
 783         if(JM()->mArch.AVX2())
 784         {
 785             Function *pmovsxwd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_avx2_pmovsxwd);
 786             return CALL(pmovsxwd, std::initializer_list<Value*>{a});
 787         }
 788         else
 789     #endif
 790         {
 791             // VPMOVSXWD output type
 792             Type* v8x32Ty = VectorType::get(mInt32Ty, 8);
 793             // Extract 8 values from 128bit lane and sign extend
 794             return S_EXT(VSHUFFLE(a, a, C<int>({0, 1, 2, 3, 4, 5, 6, 7})), v8x32Ty);
 795         }
 796     }
 797
 798     //////////////////////////////////////////////////////////////////////////
 799     /// @brief Generate a VPERMD operation (shuffle 32 bit integer values
 800     /// across 128 bit lanes) in LLVM IR.  If not supported on the underlying
 801     /// platform, emulate it
 802     /// @param a - 256bit SIMD lane(8x32bit) of integer values.
 803     /// @param idx - 256bit SIMD lane(8x32bit) of 3 bit lane index values
 804     Value *Builder::PERMD(Value* a, Value* idx)
 805     {
 806         Value* res;
 807         // use avx2 permute instruction if available
 808         if(JM()->mArch.AVX2())
 809         {
 810             res = VPERMD(a, idx);
 811         }
 812         else
 813         {
 814             if (isa<Constant>(idx))
 815             {
 816                 res = VSHUFFLE(a, a, idx);
 817             }
 818             else
 819             {
 820                 res = VUNDEF_I();
 821                 for (uint32_t l = 0; l < JM()->mVWidth; ++l)
 822                 {
 823                     Value* pIndex = VEXTRACT(idx, C(l));
 824                     Value* pVal = VEXTRACT(a, pIndex);
 825                     res = VINSERT(res, pVal, C(l));
 826                 }
 827             }
 828         }
 829         return res;
 830     }
 831
 832     //////////////////////////////////////////////////////////////////////////
 833     /// @brief Generate a VPERMPS operation (shuffle 32 bit float values
 834     /// across 128 bit lanes) in LLVM IR.  If not supported on the underlying
 835     /// platform, emulate it
 836     /// @param a - 256bit SIMD lane(8x32bit) of float values.
 837     /// @param idx - 256bit SIMD lane(8x32bit) of 3 bit lane index values
 838     Value *Builder::PERMPS(Value* a, Value* idx)
 839     {
 840         Value* res;
 841         // use avx2 permute instruction if available
 842         if (JM()->mArch.AVX2())
 843         {
 844             // llvm 3.6.0 swapped the order of the args to vpermd
 845             res = VPERMPS(idx, a);
 846         }
 847         else
 848         {
 849             if (isa<Constant>(idx))
 850             {
 851                 res = VSHUFFLE(a, a, idx);
 852             }
 853             else
 854             {
 855                 res = VUNDEF_F();
 856                 for (uint32_t l = 0; l < JM()->mVWidth; ++l)
 857                 {
 858                     Value* pIndex = VEXTRACT(idx, C(l));
 859                     Value* pVal = VEXTRACT(a, pIndex);
 860                     res = VINSERT(res, pVal, C(l));
 861                 }
 862             }
 863         }
 864
 865         return res;
 866     }
 867
 868     //////////////////////////////////////////////////////////////////////////
 869     /// @brief Generate a VCVTPH2PS operation (float16->float32 conversion)
 870     /// in LLVM IR.  If not supported on the underlying platform, emulate it
 871     /// @param a - 128bit SIMD lane(8x16bit) of float16 in int16 format.
 872     Value *Builder::CVTPH2PS(Value* a)
 873     {
 874         if (JM()->mArch.F16C())
 875         {
 876             return VCVTPH2PS(a);
 877         }
 878         else
 879         {
 880             FunctionType* pFuncTy = FunctionType::get(mFP32Ty, mInt16Ty);
 881             Function* pCvtPh2Ps = cast<Function>(JM()->mpCurrentModule->getOrInsertFunction("ConvertSmallFloatTo32", pFuncTy));
 882
 883             if (sys::DynamicLibrary::SearchForAddressOfSymbol("ConvertSmallFloatTo32") == nullptr)
 884             {
 885                 sys::DynamicLibrary::AddSymbol("ConvertSmallFloatTo32", (void *)&ConvertSmallFloatTo32);
 886             }
 887
 888             Value* pResult = UndefValue::get(mSimdFP32Ty);
 889             for (uint32_t i = 0; i < mVWidth; ++i)
 890             {
 891                 Value* pSrc = VEXTRACT(a, C(i));
 892                 Value* pConv = CALL(pCvtPh2Ps, std::initializer_list<Value*>{pSrc});
 893                 pResult = VINSERT(pResult, pConv, C(i));
 894             }
 895
 896             return pResult;
 897         }
 898     }
 899
 900     //////////////////////////////////////////////////////////////////////////
 901     /// @brief Generate a VCVTPS2PH operation (float32->float16 conversion)
 902     /// in LLVM IR.  If not supported on the underlying platform, emulate it
 903     /// @param a - 128bit SIMD lane(8x16bit) of float16 in int16 format.
 904     Value *Builder::CVTPS2PH(Value* a, Value* rounding)
 905     {
 906         if (JM()->mArch.F16C())
 907         {
 908             return VCVTPS2PH(a, rounding);
 909         }
 910         else
 911         {
 912             // call scalar C function for now
 913             FunctionType* pFuncTy = FunctionType::get(mInt16Ty, mFP32Ty);
 914             Function* pCvtPs2Ph = cast<Function>(JM()->mpCurrentModule->getOrInsertFunction("Convert32To16Float", pFuncTy));
 915
 916             if (sys::DynamicLibrary::SearchForAddressOfSymbol("Convert32To16Float") == nullptr)
 917             {
 918                 sys::DynamicLibrary::AddSymbol("Convert32To16Float", (void *)&Convert32To16Float);
 919             }
 920
 921             Value* pResult = UndefValue::get(mSimdInt16Ty);
 922             for (uint32_t i = 0; i < mVWidth; ++i)
 923             {
 924                 Value* pSrc = VEXTRACT(a, C(i));
 925                 Value* pConv = CALL(pCvtPs2Ph, std::initializer_list<Value*>{pSrc});
 926                 pResult = VINSERT(pResult, pConv, C(i));
 927             }
 928
 929             return pResult;
 930         }
 931     }
 932
 933     Value *Builder::PMAXSD(Value* a, Value* b)
 934     {
 935         // llvm-3.9 removed the pmax intrinsics
 936     #if HAVE_LLVM >= 0x309
 937         Value* cmp = ICMP_SGT(a, b);
 938         return SELECT(cmp, a, b);
 939     #else
 940         if (JM()->mArch.AVX2())
 941         {
 942             Function* pmaxsd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_avx2_pmaxs_d);
 943             return CALL(pmaxsd, {a, b});
 944         }
 945         else
 946         {
 947             // use 4-wide sse max intrinsic on lower/upper halves of 8-wide sources
 948             Function* pmaxsd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_sse41_pmaxsd);
 949
 950             // low 128
 951             Value* aLo = VEXTRACTI128(a, C((uint8_t)0));
 952             Value* bLo = VEXTRACTI128(b, C((uint8_t)0));
 953             Value* resLo = CALL(pmaxsd, {aLo, bLo});
 954
 955             // high 128
 956             Value* aHi = VEXTRACTI128(a, C((uint8_t)1));
 957             Value* bHi = VEXTRACTI128(b, C((uint8_t)1));
 958             Value* resHi = CALL(pmaxsd, {aHi, bHi});
 959
 960             // combine
 961             Value* result = VINSERTI128(VUNDEF_I(), resLo, C((uint8_t)0));
 962             result = VINSERTI128(result, resHi, C((uint8_t)1));
 963
 964             return result;
 965         }
 966     #endif
 967     }
 968
 969     Value *Builder::PMINSD(Value* a, Value* b)
 970     {
 971         // llvm-3.9 removed the pmin intrinsics
 972     #if HAVE_LLVM >= 0x309
 973         Value* cmp = ICMP_SLT(a, b);
 974         return SELECT(cmp, a, b);
 975     #else
 976         if (JM()->mArch.AVX2())
 977         {
 978             Function* pminsd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_avx2_pmins_d);
 979             return CALL(pminsd, {a, b});
 980         }
 981         else
 982         {
 983             // use 4-wide sse max intrinsic on lower/upper halves of 8-wide sources
 984             Function* pminsd = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::x86_sse41_pminsd);
 985
 986             // low 128
 987             Value* aLo = VEXTRACTI128(a, C((uint8_t)0));
 988             Value* bLo = VEXTRACTI128(b, C((uint8_t)0));
 989             Value* resLo = CALL(pminsd, {aLo, bLo});
 990
 991             // high 128
 992             Value* aHi = VEXTRACTI128(a, C((uint8_t)1));
 993             Value* bHi = VEXTRACTI128(b, C((uint8_t)1));
 994             Value* resHi = CALL(pminsd, {aHi, bHi});
 995
 996             // combine
 997             Value* result = VINSERTI128(VUNDEF_I(), resLo, C((uint8_t)0));
 998             result = VINSERTI128(result, resHi, C((uint8_t)1));
 999
1000             return result;
1001         }
1002     #endif
1003     }
1004
1005     void Builder::Gather4(const SWR_FORMAT format, Value* pSrcBase, Value* byteOffsets,
1006                           Value* mask, Value* vGatherComponents[], bool bPackedOutput)
1007     {
1008         const SWR_FORMAT_INFO &info = GetFormatInfo(format);
1009         if(info.type[0] == SWR_TYPE_FLOAT && info.bpc[0] == 32)
1010         {
1011             // ensure our mask is the correct type
1012             mask = BITCAST(mask, mSimdFP32Ty);
1013             GATHER4PS(info, pSrcBase, byteOffsets, mask, vGatherComponents, bPackedOutput);
1014         }
1015         else
1016         {
1017             // ensure our mask is the correct type
1018             mask = BITCAST(mask, mSimdInt32Ty);
1019             GATHER4DD(info, pSrcBase, byteOffsets, mask, vGatherComponents, bPackedOutput);
1020         }
1021     }
1022
1023     void Builder::GATHER4PS(const SWR_FORMAT_INFO &info, Value* pSrcBase, Value* byteOffsets,
1024                             Value* mask, Value* vGatherComponents[], bool bPackedOutput)
1025     {
1026         switch(info.bpp / info.numComps)
1027         {
1028             case 16:
1029             {
1030                     Value* vGatherResult[2];
1031                     Value *vMask;
1032
1033                     // TODO: vGatherMaskedVal
1034                     Value* vGatherMaskedVal = VIMMED1((float)0);
1035
1036                     // always have at least one component out of x or y to fetch
1037
1038                     // save mask as it is zero'd out after each gather
1039                     vMask = mask;
1040
1041                     vGatherResult[0] = GATHERPS(vGatherMaskedVal, pSrcBase, byteOffsets, vMask, C((char)1));
1042                     // e.g. result of first 8x32bit integer gather for 16bit components
1043                     // 256i - 0    1    2    3    4    5    6    7
1044                     //        xyxy xyxy xyxy xyxy xyxy xyxy xyxy xyxy
1045                     //
1046
1047                     // if we have at least one component out of x or y to fetch
1048                     if(info.numComps > 2)
1049                     {
1050                         // offset base to the next components(zw) in the vertex to gather
1051                         pSrcBase = GEP(pSrcBase, C((char)4));
1052                         vMask = mask;
1053
1054                         vGatherResult[1] =  GATHERPS(vGatherMaskedVal, pSrcBase, byteOffsets, vMask, C((char)1));
1055                         // e.g. result of second 8x32bit integer gather for 16bit components
1056                         // 256i - 0    1    2    3    4    5    6    7
1057                         //        zwzw zwzw zwzw zwzw zwzw zwzw zwzw zwzw
1058                         //
1059                     }
1060                     else
1061                     {
1062                         vGatherResult[1] =  vGatherMaskedVal;
1063                     }
1064
1065                     // Shuffle gathered components into place, each row is a component
1066                     Shuffle16bpcGather4(info, vGatherResult, vGatherComponents, bPackedOutput);
1067             }
1068                 break;
1069             case 32:
1070             {
1071                 // apply defaults
1072                 for (uint32_t i = 0; i < 4; ++i)
1073                 {
1074                     vGatherComponents[i] = VIMMED1(*(float*)&info.defaults[i]);
1075                 }
1076
1077                 for(uint32_t i = 0; i < info.numComps; i++)
1078                 {
1079                     uint32_t swizzleIndex = info.swizzle[i];
1080
1081                     // save mask as it is zero'd out after each gather
1082                     Value *vMask = mask;
1083
1084                     // Gather a SIMD of components
1085                     vGatherComponents[swizzleIndex] = GATHERPS(vGatherComponents[swizzleIndex], pSrcBase, byteOffsets, vMask, C((char)1));
1086
1087                     // offset base to the next component to gather
1088                     pSrcBase = GEP(pSrcBase, C((char)4));
1089                 }
1090             }
1091                 break;
1092             default:
1093                 SWR_ASSERT(0, "Invalid float format");
1094                 break;
1095         }
1096     }
1097
1098     void Builder::GATHER4DD(const SWR_FORMAT_INFO &info, Value* pSrcBase, Value* byteOffsets,
1099                             Value* mask, Value* vGatherComponents[], bool bPackedOutput)
1100     {
1101         switch (info.bpp / info.numComps)
1102         {
1103             case 8:
1104             {
1105                 Value* vGatherMaskedVal = VIMMED1((int32_t)0);
1106                 Value* vGatherResult = GATHERDD(vGatherMaskedVal, pSrcBase, byteOffsets, mask, C((char)1));
1107                 // e.g. result of an 8x32bit integer gather for 8bit components
1108                 // 256i - 0    1    2    3    4    5    6    7
1109                 //        xyzw xyzw xyzw xyzw xyzw xyzw xyzw xyzw
1110
1111                 Shuffle8bpcGather4(info, vGatherResult, vGatherComponents, bPackedOutput);
1112             }
1113                 break;
1114             case 16:
1115             {
1116                 Value* vGatherResult[2];
1117                 Value *vMask;
1118
1119                 // TODO: vGatherMaskedVal
1120                 Value* vGatherMaskedVal = VIMMED1((int32_t)0);
1121
1122                 // always have at least one component out of x or y to fetch
1123
1124                 // save mask as it is zero'd out after each gather
1125                 vMask = mask;
1126
1127                 vGatherResult[0] = GATHERDD(vGatherMaskedVal, pSrcBase, byteOffsets, vMask, C((char)1));
1128                 // e.g. result of first 8x32bit integer gather for 16bit components
1129                 // 256i - 0    1    2    3    4    5    6    7
1130                 //        xyxy xyxy xyxy xyxy xyxy xyxy xyxy xyxy
1131                 //
1132
1133                 // if we have at least one component out of x or y to fetch
1134                 if(info.numComps > 2)
1135                 {
1136                     // offset base to the next components(zw) in the vertex to gather
1137                     pSrcBase = GEP(pSrcBase, C((char)4));
1138                     vMask = mask;
1139
1140                     vGatherResult[1] = GATHERDD(vGatherMaskedVal, pSrcBase, byteOffsets, vMask, C((char)1));
1141                     // e.g. result of second 8x32bit integer gather for 16bit components
1142                     // 256i - 0    1    2    3    4    5    6    7
1143                     //        zwzw zwzw zwzw zwzw zwzw zwzw zwzw zwzw
1144                     //
1145                 }
1146                 else
1147                 {
1148                     vGatherResult[1] = vGatherMaskedVal;
1149                 }
1150
1151                 // Shuffle gathered components into place, each row is a component
1152                 Shuffle16bpcGather4(info, vGatherResult, vGatherComponents, bPackedOutput);
1153
1154             }
1155                 break;
1156             case 32:
1157             {
1158                 // apply defaults
1159                 for (uint32_t i = 0; i < 4; ++i)
1160                 {
1161                     vGatherComponents[i] = VIMMED1((int)info.defaults[i]);
1162                 }
1163
1164                 for(uint32_t i = 0; i < info.numComps; i++)
1165                 {
1166                     uint32_t swizzleIndex = info.swizzle[i];
1167
1168                     // save mask as it is zero'd out after each gather
1169                     Value *vMask = mask;
1170
1171                     // Gather a SIMD of components
1172                     vGatherComponents[swizzleIndex] = GATHERDD(vGatherComponents[swizzleIndex], pSrcBase, byteOffsets, vMask, C((char)1));
1173
1174                     // offset base to the next component to gather
1175                     pSrcBase = GEP(pSrcBase, C((char)4));
1176                 }
1177             }
1178                 break;
1179             default:
1180                 SWR_ASSERT(0, "unsupported format");
1181             break;
1182         }
1183     }
1184
1185     void Builder::Shuffle16bpcGather4(const SWR_FORMAT_INFO &info, Value* vGatherInput[2], Value* vGatherOutput[4], bool bPackedOutput)
1186     {
1187         // cast types
1188         Type* vGatherTy = VectorType::get(IntegerType::getInt32Ty(JM()->mContext), mVWidth);
1189         Type* v32x8Ty = VectorType::get(mInt8Ty, mVWidth * 4); // vwidth is units of 32 bits
1190
1191         // input could either be float or int vector; do shuffle work in int
1192         vGatherInput[0] = BITCAST(vGatherInput[0], mSimdInt32Ty);
1193         vGatherInput[1] = BITCAST(vGatherInput[1], mSimdInt32Ty);
1194
1195         if(bPackedOutput)
1196         {
1197             Type* v128bitTy = VectorType::get(IntegerType::getIntNTy(JM()->mContext, 128), mVWidth / 4); // vwidth is units of 32 bits
1198
1199             // shuffle mask
1200             Value* vConstMask = C<char>({0, 1, 4, 5, 8, 9, 12, 13, 2, 3, 6, 7, 10, 11, 14, 15,
1201                                          0, 1, 4, 5, 8, 9, 12, 13, 2, 3, 6, 7, 10, 11, 14, 15});
1202             Value* vShufResult = BITCAST(PSHUFB(BITCAST(vGatherInput[0], v32x8Ty), vConstMask), vGatherTy);
1203             // after pshufb: group components together in each 128bit lane
1204             // 256i - 0    1    2    3    4    5    6    7
1205             //        xxxx xxxx yyyy yyyy xxxx xxxx yyyy yyyy
1206
1207             Value* vi128XY = BITCAST(PERMD(vShufResult, C<int32_t>({0, 1, 4, 5, 2, 3, 6, 7})), v128bitTy);
1208             // after PERMD: move and pack xy components into each 128bit lane
1209             // 256i - 0    1    2    3    4    5    6    7
1210             //        xxxx xxxx xxxx xxxx yyyy yyyy yyyy yyyy
1211
1212             // do the same for zw components
1213             Value* vi128ZW = nullptr;
1214             if(info.numComps > 2)
1215             {
1216                 Value* vShufResult = BITCAST(PSHUFB(BITCAST(vGatherInput[1], v32x8Ty), vConstMask), vGatherTy);
1217                 vi128ZW = BITCAST(PERMD(vShufResult, C<int32_t>({0, 1, 4, 5, 2, 3, 6, 7})), v128bitTy);
1218             }
1219
1220             for(uint32_t i = 0; i < 4; i++)
1221             {
1222                 uint32_t swizzleIndex = info.swizzle[i];
1223                 // todo: fixed for packed
1224                 Value* vGatherMaskedVal = VIMMED1((int32_t)(info.defaults[i]));
1225                 if(i >= info.numComps)
1226                 {
1227                     // set the default component val
1228                     vGatherOutput[swizzleIndex] = vGatherMaskedVal;
1229                     continue;
1230                 }
1231
1232                 // if x or z, extract 128bits from lane 0, else for y or w, extract from lane 1
1233                 uint32_t lane = ((i == 0) || (i == 2)) ? 0 : 1;
1234                 // if x or y, use vi128XY permute result, else use vi128ZW
1235                 Value* selectedPermute = (i < 2) ? vi128XY : vi128ZW;
1236
1237                 // extract packed component 128 bit lanes
1238                 vGatherOutput[swizzleIndex] = VEXTRACT(selectedPermute, C(lane));
1239             }
1240
1241         }
1242         else
1243         {
1244             // pshufb masks for each component
1245             Value* vConstMask[2];
1246             // x/z shuffle mask
1247             vConstMask[0] = C<char>({0, 1, -1, -1, 4, 5, -1, -1, 8, 9, -1, -1, 12, 13, -1, -1,
1248                                      0, 1, -1, -1, 4, 5, -1, -1, 8, 9, -1, -1, 12, 13, -1, -1, });
1249
1250             // y/w shuffle mask
1251             vConstMask[1] = C<char>({2, 3, -1, -1, 6, 7, -1, -1, 10, 11, -1, -1, 14, 15, -1, -1,
1252                                      2, 3, -1, -1, 6, 7, -1, -1, 10, 11, -1, -1, 14, 15, -1, -1});
1253
1254
1255             // shuffle enabled components into lower word of each 32bit lane, 0 extending to 32 bits
1256             // apply defaults
1257             for (uint32_t i = 0; i < 4; ++i)
1258             {
1259                 vGatherOutput[i] = VIMMED1((int32_t)info.defaults[i]);
1260             }
1261
1262             for(uint32_t i = 0; i < info.numComps; i++)
1263             {
1264                 uint32_t swizzleIndex = info.swizzle[i];
1265
1266                 // select correct constMask for x/z or y/w pshufb
1267                 uint32_t selectedMask = ((i == 0) || (i == 2)) ? 0 : 1;
1268                 // if x or y, use vi128XY permute result, else use vi128ZW
1269                 uint32_t selectedGather = (i < 2) ? 0 : 1;
1270
1271                 vGatherOutput[swizzleIndex] = BITCAST(PSHUFB(BITCAST(vGatherInput[selectedGather], v32x8Ty), vConstMask[selectedMask]), vGatherTy);
1272                 // after pshufb mask for x channel; z uses the same shuffle from the second gather
1273                 // 256i - 0    1    2    3    4    5    6    7
1274                 //        xx00 xx00 xx00 xx00 xx00 xx00 xx00 xx00
1275             }
1276         }
1277     }
1278
1279     void Builder::Shuffle8bpcGather4(const SWR_FORMAT_INFO &info, Value* vGatherInput, Value* vGatherOutput[], bool bPackedOutput)
1280     {
1281         // cast types
1282         Type* vGatherTy = VectorType::get(IntegerType::getInt32Ty(JM()->mContext), mVWidth);
1283         Type* v32x8Ty =  VectorType::get(mInt8Ty, mVWidth * 4 ); // vwidth is units of 32 bits
1284
1285         if(bPackedOutput)
1286         {
1287             Type* v128Ty = VectorType::get(IntegerType::getIntNTy(JM()->mContext, 128), mVWidth / 4); // vwidth is units of 32 bits
1288             // shuffle mask
1289             Value* vConstMask = C<char>({0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15,
1290                                          0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15});
1291             Value* vShufResult = BITCAST(PSHUFB(BITCAST(vGatherInput, v32x8Ty), vConstMask), vGatherTy);
1292             // after pshufb: group components together in each 128bit lane
1293             // 256i - 0    1    2    3    4    5    6    7
1294             //        xxxx yyyy zzzz wwww xxxx yyyy zzzz wwww
1295
1296             Value* vi128XY = BITCAST(PERMD(vShufResult, C<int32_t>({0, 4, 0, 0, 1, 5, 0, 0})), v128Ty);
1297             // after PERMD: move and pack xy and zw components in low 64 bits of each 128bit lane
1298             // 256i - 0    1    2    3    4    5    6    7
1299             //        xxxx xxxx dcdc dcdc yyyy yyyy dcdc dcdc (dc - don't care)
1300
1301             // do the same for zw components
1302             Value* vi128ZW = nullptr;
1303             if(info.numComps > 2)
1304             {
1305                 vi128ZW = BITCAST(PERMD(vShufResult, C<int32_t>({2, 6, 0, 0, 3, 7, 0, 0})), v128Ty);
1306             }
1307
1308             // sign extend all enabled components. If we have a fill vVertexElements, output to current simdvertex
1309             for(uint32_t i = 0; i < 4; i++)
1310             {
1311                 uint32_t swizzleIndex = info.swizzle[i];
1312                 // todo: fix for packed
1313                 Value* vGatherMaskedVal = VIMMED1((int32_t)(info.defaults[i]));
1314                 if(i >= info.numComps)
1315                 {
1316                     // set the default component val
1317                     vGatherOutput[swizzleIndex] = vGatherMaskedVal;
1318                     continue;
1319                 }
1320
1321                 // if x or z, extract 128bits from lane 0, else for y or w, extract from lane 1
1322                 uint32_t lane = ((i == 0) || (i == 2)) ? 0 : 1;
1323                 // if x or y, use vi128XY permute result, else use vi128ZW
1324                 Value* selectedPermute = (i < 2) ? vi128XY : vi128ZW;
1325
1326                 // sign extend
1327                 vGatherOutput[swizzleIndex] = VEXTRACT(selectedPermute, C(lane));
1328             }
1329         }
1330         // else zero extend
1331         else{
1332             // shuffle enabled components into lower byte of each 32bit lane, 0 extending to 32 bits
1333             // apply defaults
1334             for (uint32_t i = 0; i < 4; ++i)
1335             {
1336                 vGatherOutput[i] = VIMMED1((int32_t)info.defaults[i]);
1337             }
1338
1339             for(uint32_t i = 0; i < info.numComps; i++){
1340                 uint32_t swizzleIndex = info.swizzle[i];
1341
1342                 // pshufb masks for each component
1343                 Value* vConstMask;
1344                 switch(i)
1345                 {
1346                     case 0:
1347                         // x shuffle mask
1348                         vConstMask = C<char>({0, -1, -1, -1, 4, -1, -1, -1, 8, -1, -1, -1, 12, -1, -1, -1,
1349                                               0, -1, -1, -1, 4, -1, -1, -1, 8, -1, -1, -1, 12, -1, -1, -1});
1350                         break;
1351                     case 1:
1352                         // y shuffle mask
1353                         vConstMask = C<char>({1, -1, -1, -1, 5, -1, -1, -1, 9, -1, -1, -1, 13, -1, -1, -1,
1354                                               1, -1, -1, -1, 5, -1, -1, -1, 9, -1, -1, -1, 13, -1, -1, -1});
1355                         break;
1356                     case 2:
1357                         // z shuffle mask
1358                         vConstMask = C<char>({2, -1, -1, -1, 6, -1, -1, -1, 10, -1, -1, -1, 14, -1, -1, -1,
1359                                               2, -1, -1, -1, 6, -1, -1, -1, 10, -1, -1, -1, 14, -1, -1, -1});
1360                         break;
1361                     case 3:
1362                         // w shuffle mask
1363                         vConstMask = C<char>({3, -1, -1, -1, 7, -1, -1, -1, 11, -1, -1, -1, 15, -1, -1, -1,
1364                                               3, -1, -1, -1, 7, -1, -1, -1, 11, -1, -1, -1, 15, -1, -1, -1});
1365                         break;
1366                     default:
1367                         vConstMask = nullptr;
1368                         break;
1369                 }
1370
1371                     vGatherOutput[swizzleIndex] = BITCAST(PSHUFB(BITCAST(vGatherInput, v32x8Ty), vConstMask), vGatherTy);
1372                     // after pshufb for x channel
1373                     // 256i - 0    1    2    3    4    5    6    7
1374                     //        x000 x000 x000 x000 x000 x000 x000 x000
1375             }
1376         }
1377     }
1378
1379     // Helper function to create alloca in entry block of function
1380     Value* Builder::CreateEntryAlloca(Function* pFunc, Type* pType)
1381     {
1382         auto saveIP = IRB()->saveIP();
1383         IRB()->SetInsertPoint(&pFunc->getEntryBlock(),
1384                               pFunc->getEntryBlock().begin());
1385         Value* pAlloca = ALLOCA(pType);
1386         IRB()->restoreIP(saveIP);
1387         return pAlloca;
1388     }
1389
1390     //////////////////////////////////////////////////////////////////////////
1391     /// @brief emulates a scatter operation.
1392     /// @param pDst - pointer to destination
1393     /// @param vSrc - vector of src data to scatter
1394     /// @param vOffsets - vector of byte offsets from pDst
1395     /// @param vMask - mask of valid lanes
1396     void Builder::SCATTERPS(Value* pDst, Value* vSrc, Value* vOffsets, Value* vMask)
1397     {
1398         /* Scatter algorithm
1399
1400            while(Index = BitScanForward(mask))
1401                 srcElem = srcVector[Index]
1402                 offsetElem = offsetVector[Index]
1403                 *(pDst + offsetElem) = srcElem
1404                 Update mask (&= ~(1<<Index)
1405
1406         */
1407
1408         BasicBlock* pCurBB = IRB()->GetInsertBlock();
1409         Function* pFunc = pCurBB->getParent();
1410         Type* pSrcTy = vSrc->getType()->getVectorElementType();
1411
1412         // Store vectors on stack
1413         if (pScatterStackSrc == nullptr)
1414         {
1415             // Save off stack allocations and reuse per scatter. Significantly reduces stack
1416             // requirements for shaders with a lot of scatters.
1417             pScatterStackSrc = CreateEntryAlloca(pFunc, mSimdInt64Ty);
1418             pScatterStackOffsets = CreateEntryAlloca(pFunc, mSimdInt32Ty);
1419         }
1420
1421         Value* pSrcArrayPtr = BITCAST(pScatterStackSrc, PointerType::get(vSrc->getType(), 0));
1422         Value* pOffsetsArrayPtr = pScatterStackOffsets;
1423         STORE(vSrc, pSrcArrayPtr);
1424         STORE(vOffsets, pOffsetsArrayPtr);
1425
1426         // Cast to pointers for random access
1427         pSrcArrayPtr = POINTER_CAST(pSrcArrayPtr, PointerType::get(pSrcTy, 0));
1428         pOffsetsArrayPtr = POINTER_CAST(pOffsetsArrayPtr, PointerType::get(mInt32Ty, 0));
1429
1430         Value* pMask = VMOVMSKPS(BITCAST(vMask, mSimdFP32Ty));
1431
1432         // Get cttz function
1433         Function* pfnCttz = Intrinsic::getDeclaration(mpJitMgr->mpCurrentModule, Intrinsic::cttz, { mInt32Ty });
1434
1435         // Setup loop basic block
1436         BasicBlock* pLoop = BasicBlock::Create(mpJitMgr->mContext, "Scatter Loop", pFunc);
1437
1438         // compute first set bit
1439         Value* pIndex = CALL(pfnCttz, { pMask, C(false) });
1440
1441         Value* pIsUndef = ICMP_EQ(pIndex, C(32));
1442
1443         // Split current block
1444         BasicBlock* pPostLoop = pCurBB->splitBasicBlock(cast<Instruction>(pIsUndef)->getNextNode());
1445
1446         // Remove unconditional jump created by splitBasicBlock
1447         pCurBB->getTerminator()->eraseFromParent();
1448
1449         // Add terminator to end of original block
1450         IRB()->SetInsertPoint(pCurBB);
1451
1452         // Add conditional branch
1453         COND_BR(pIsUndef, pPostLoop, pLoop);
1454
1455         // Add loop basic block contents
1456         IRB()->SetInsertPoint(pLoop);
1457         PHINode* pIndexPhi = PHI(mInt32Ty, 2);
1458         PHINode* pMaskPhi = PHI(mInt32Ty, 2);
1459
1460         pIndexPhi->addIncoming(pIndex, pCurBB);
1461         pMaskPhi->addIncoming(pMask, pCurBB);
1462
1463         // Extract elements for this index
1464         Value* pSrcElem = LOADV(pSrcArrayPtr, { pIndexPhi });
1465         Value* pOffsetElem = LOADV(pOffsetsArrayPtr, { pIndexPhi });
1466
1467         // GEP to this offset in dst
1468         Value* pCurDst = GEP(pDst, pOffsetElem);
1469         pCurDst = POINTER_CAST(pCurDst, PointerType::get(pSrcTy, 0));
1470         STORE(pSrcElem, pCurDst);
1471
1472         // Update the mask
1473         Value* pNewMask = AND(pMaskPhi, NOT(SHL(C(1), pIndexPhi)));
1474
1475         // Terminator
1476         Value* pNewIndex = CALL(pfnCttz, { pNewMask, C(false) });
1477
1478         pIsUndef = ICMP_EQ(pNewIndex, C(32));
1479         COND_BR(pIsUndef, pPostLoop, pLoop);
1480
1481         // Update phi edges
1482         pIndexPhi->addIncoming(pNewIndex, pLoop);
1483         pMaskPhi->addIncoming(pNewMask, pLoop);
1484
1485         // Move builder to beginning of post loop
1486         IRB()->SetInsertPoint(pPostLoop, pPostLoop->begin());
1487     }
1488
1489     Value* Builder::VABSPS(Value* a)
1490     {
1491         Value* asInt = BITCAST(a, mSimdInt32Ty);
1492         Value* result = BITCAST(AND(asInt, VIMMED1(0x7fffffff)), mSimdFP32Ty);
1493         return result;
1494     }
1495
1496     Value *Builder::ICLAMP(Value* src, Value* low, Value* high)
1497     {
1498         Value *lowCmp = ICMP_SLT(src, low);
1499         Value *ret = SELECT(lowCmp, low, src);
1500
1501         Value *highCmp = ICMP_SGT(ret, high);
1502         ret = SELECT(highCmp, high, ret);
1503
1504         return ret;
1505     }
1506
1507     Value *Builder::FCLAMP(Value* src, Value* low, Value* high)
1508     {
1509         Value *lowCmp = FCMP_OLT(src, low);
1510         Value *ret = SELECT(lowCmp, low, src);
1511
1512         Value *highCmp = FCMP_OGT(ret, high);
1513         ret = SELECT(highCmp, high, ret);
1514
1515         return ret;
1516     }
1517
1518     Value *Builder::FCLAMP(Value* src, float low, float high)
1519     {
1520         Value* result = VMAXPS(src, VIMMED1(low));
1521         result = VMINPS(result, VIMMED1(high));
1522
1523         return result;
1524     }
1525
1526     //////////////////////////////////////////////////////////////////////////
1527     /// @brief save/restore stack, providing ability to push/pop the stack and
1528     ///        reduce overall stack requirements for temporary stack use
1529     Value* Builder::STACKSAVE()
1530     {
1531         Function* pfnStackSave = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::stacksave);
1532     #if HAVE_LLVM == 0x306
1533         return CALL(pfnStackSave);
1534     #else
1535         return CALLA(pfnStackSave);
1536     #endif
1537     }
1538
1539     void Builder::STACKRESTORE(Value* pSaved)
1540     {
1541         Function* pfnStackRestore = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::stackrestore);
1542         CALL(pfnStackRestore, std::initializer_list<Value*>{pSaved});
1543     }
1544
1545     Value *Builder::FMADDPS(Value* a, Value* b, Value* c)
1546     {
1547         Value* vOut;
1548         // use FMADs if available
1549         if(JM()->mArch.AVX2())
1550         {
1551             vOut = VFMADDPS(a, b, c);
1552         }
1553         else
1554         {
1555             vOut = FADD(FMUL(a, b), c);
1556         }
1557         return vOut;
1558     }
1559
1560     Value* Builder::POPCNT(Value* a)
1561     {
1562         Function* pCtPop = Intrinsic::getDeclaration(JM()->mpCurrentModule, Intrinsic::ctpop, { a->getType() });
1563         return CALL(pCtPop, std::initializer_list<Value*>{a});
1564     }
1565
1566     //////////////////////////////////////////////////////////////////////////
1567     /// @brief C functions called by LLVM IR
1568     //////////////////////////////////////////////////////////////////////////
1569
1570     //////////////////////////////////////////////////////////////////////////
1571     /// @brief called in JIT code, inserted by PRINT
1572     /// output to both stdout and visual studio debug console
1573     void __cdecl CallPrint(const char* fmt, ...)
1574     {
1575         va_list args;
1576         va_start(args, fmt);
1577         vprintf(fmt, args);
1578
1579     #if defined( _WIN32 )
1580         char strBuf[1024];
1581         vsnprintf_s(strBuf, _TRUNCATE, fmt, args);
1582         OutputDebugString(strBuf);
1583     #endif
1584
1585         va_end(args);
1586     }
1587
1588     Value *Builder::VEXTRACTI128(Value* a, Constant* imm8)
1589     {
1590     #if HAVE_LLVM == 0x306
1591         Function *func =
1592             Intrinsic::getDeclaration(JM()->mpCurrentModule,
1593                                       Intrinsic::x86_avx_vextractf128_si_256);
1594         return CALL(func, {a, imm8});
1595     #else
1596         bool flag = !imm8->isZeroValue();
1597         SmallVector<Constant*,8> idx;
1598         for (unsigned i = 0; i < mVWidth / 2; i++) {
1599             idx.push_back(C(flag ? i + mVWidth / 2 : i));
1600         }
1601         return VSHUFFLE(a, VUNDEF_I(), ConstantVector::get(idx));
1602     #endif
1603     }
1604
1605     Value *Builder::VINSERTI128(Value* a, Value* b, Constant* imm8)
1606     {
1607     #if HAVE_LLVM == 0x306
1608         Function *func =
1609             Intrinsic::getDeclaration(JM()->mpCurrentModule,
1610                                       Intrinsic::x86_avx_vinsertf128_si_256);
1611         return CALL(func, {a, b, imm8});
1612     #else
1613         bool flag = !imm8->isZeroValue();
1614         SmallVector<Constant*,8> idx;
1615         for (unsigned i = 0; i < mVWidth; i++) {
1616             idx.push_back(C(i));
1617         }
1618         Value *inter = VSHUFFLE(b, VUNDEF_I(), ConstantVector::get(idx));
1619
1620         SmallVector<Constant*,8> idx2;
1621         for (unsigned i = 0; i < mVWidth / 2; i++) {
1622             idx2.push_back(C(flag ? i : i + mVWidth));
1623         }
1624         for (unsigned i = mVWidth / 2; i < mVWidth; i++) {
1625             idx2.push_back(C(flag ? i + mVWidth / 2 : i));
1626         }
1627         return VSHUFFLE(a, inter, ConstantVector::get(idx2));
1628     #endif
1629     }
1630
1631     // rdtsc buckets macros
1632     void Builder::RDTSC_START(Value* pBucketMgr, Value* pId)
1633     {
1634         // @todo due to an issue with thread local storage propagation in llvm, we can only safely call into
1635         // buckets framework when single threaded
1636         if (KNOB_SINGLE_THREADED)
1637         {
1638             std::vector<Type*> args{
1639                 PointerType::get(mInt32Ty, 0),   // pBucketMgr
1640                 mInt32Ty                        // id
1641             };
1642
1643             FunctionType* pFuncTy = FunctionType::get(Type::getVoidTy(JM()->mContext), args, false);
1644             Function* pFunc = cast<Function>(JM()->mpCurrentModule->getOrInsertFunction("BucketManager_StartBucket", pFuncTy));
1645             if (sys::DynamicLibrary::SearchForAddressOfSymbol("BucketManager_StartBucket") == nullptr)
1646             {
1647                 sys::DynamicLibrary::AddSymbol("BucketManager_StartBucket", (void*)&BucketManager_StartBucket);
1648             }
1649
1650             CALL(pFunc, { pBucketMgr, pId });
1651         }
1652     }
1653
1654     void Builder::RDTSC_STOP(Value* pBucketMgr, Value* pId)
1655     {
1656         // @todo due to an issue with thread local storage propagation in llvm, we can only safely call into
1657         // buckets framework when single threaded
1658         if (KNOB_SINGLE_THREADED)
1659         {
1660             std::vector<Type*> args{
1661                 PointerType::get(mInt32Ty, 0),   // pBucketMgr
1662                 mInt32Ty                        // id
1663             };
1664
1665             FunctionType* pFuncTy = FunctionType::get(Type::getVoidTy(JM()->mContext), args, false);
1666             Function* pFunc = cast<Function>(JM()->mpCurrentModule->getOrInsertFunction("BucketManager_StopBucket", pFuncTy));
1667             if (sys::DynamicLibrary::SearchForAddressOfSymbol("BucketManager_StopBucket") == nullptr)
1668             {
1669                 sys::DynamicLibrary::AddSymbol("BucketManager_StopBucket", (void*)&BucketManager_StopBucket);
1670             }
1671
1672             CALL(pFunc, { pBucketMgr, pId });
1673         }
1674     }
1675
1676 }