src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp

   1 /*
   2  * Copyright 2011 Christoph Bumiller
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include "codegen/nv50_ir_target_nv50.h"
  24
  25 namespace nv50_ir {
  26
  27 Target *getTargetNV50(unsigned int chipset)
  28 {
  29    return new TargetNV50(chipset);
  30 }
  31
  32 TargetNV50::TargetNV50(unsigned int card) : Target(true, true, false)
  33 {
  34    chipset = card;
  35
  36    wposMask = 0;
  37    for (unsigned int i = 0; i <= SV_LAST; ++i)
  38       sysvalLocation[i] = ~0;
  39
  40    initOpInfo();
  41 }
  42
  43 #if 0
  44 // BULTINS / LIBRARY FUNCTIONS:
  45
  46 // TODO
  47 static const uint32_t nvc0_builtin_code[] =
  48 {
  49 };
  50
  51 static const uint16_t nvc0_builtin_offsets[NV50_BUILTIN_COUNT] =
  52 {
  53 };
  54 #endif
  55
  56 void
  57 TargetNV50::getBuiltinCode(const uint32_t **code, uint32_t *size) const
  58 {
  59    *code = NULL;
  60    *size = 0;
  61 }
  62
  63 uint32_t
  64 TargetNV50::getBuiltinOffset(int builtin) const
  65 {
  66    return 0;
  67 }
  68
  69 struct opProperties
  70 {
  71    operation op;
  72    unsigned int mNeg    : 4;
  73    unsigned int mAbs    : 4;
  74    unsigned int mNot    : 4;
  75    unsigned int mSat    : 4;
  76    unsigned int fConst  : 3;
  77    unsigned int fShared : 3;
  78    unsigned int fAttrib : 3;
  79    unsigned int fImm    : 3;
  80 };
  81
  82 static const struct opProperties _initProps[] =
  83 {
  84    //           neg  abs  not  sat  c[]  s[], a[], imm
  85    { OP_ADD,    0x3, 0x0, 0x0, 0x8, 0x2, 0x1, 0x1, 0x2 },
  86    { OP_SUB,    0x3, 0x0, 0x0, 0x8, 0x2, 0x1, 0x1, 0x2 },
  87    { OP_MUL,    0x3, 0x0, 0x0, 0x0, 0x2, 0x1, 0x1, 0x2 },
  88    { OP_MAX,    0x3, 0x3, 0x0, 0x0, 0x2, 0x1, 0x1, 0x0 },
  89    { OP_MIN,    0x3, 0x3, 0x0, 0x0, 0x2, 0x1, 0x1, 0x0 },
  90    { OP_MAD,    0x7, 0x0, 0x0, 0x8, 0x6, 0x1, 0x1, 0x0 }, // special constraint
  91    { OP_ABS,    0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x1, 0x0 },
  92    { OP_NEG,    0x0, 0x1, 0x0, 0x0, 0x0, 0x1, 0x1, 0x0 },
  93    { OP_CVT,    0x1, 0x1, 0x0, 0x8, 0x0, 0x1, 0x1, 0x0 },
  94    { OP_AND,    0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x2 },
  95    { OP_OR,     0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x2 },
  96    { OP_XOR,    0x0, 0x0, 0x3, 0x0, 0x0, 0x0, 0x0, 0x2 },
  97    { OP_SHL,    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2 },
  98    { OP_SHR,    0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x2 },
  99    { OP_SET,    0x3, 0x3, 0x0, 0x0, 0x2, 0x1, 0x1, 0x0 },
 100    { OP_PREEX2, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 101    { OP_PRESIN, 0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 102    { OP_EX2,    0x0, 0x0, 0x0, 0x8, 0x0, 0x0, 0x0, 0x0 },
 103    { OP_LG2,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 104    { OP_RCP,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 105    { OP_RSQ,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 106    { OP_DFDX,   0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 107    { OP_DFDY,   0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
 108 };
 109
 110 void TargetNV50::initOpInfo()
 111 {
 112    unsigned int i, j;
 113
 114    static const operation commutativeList[] =
 115    {
 116       OP_ADD, OP_MUL, OP_MAD, OP_FMA, OP_AND, OP_OR, OP_XOR, OP_MAX, OP_MIN,
 117       OP_SET_AND, OP_SET_OR, OP_SET_XOR, OP_SET, OP_SELP, OP_SLCT
 118    };
 119    static const operation shortFormList[] =
 120    {
 121       OP_MOV, OP_ADD, OP_SUB, OP_MUL, OP_MAD, OP_SAD, OP_RCP, OP_LINTERP,
 122       OP_PINTERP, OP_TEX, OP_TXF
 123    };
 124    static const operation noDestList[] =
 125    {
 126       OP_STORE, OP_WRSV, OP_EXPORT, OP_BRA, OP_CALL, OP_RET, OP_EXIT,
 127       OP_DISCARD, OP_CONT, OP_BREAK, OP_PRECONT, OP_PREBREAK, OP_PRERET,
 128       OP_JOIN, OP_JOINAT, OP_BRKPT, OP_MEMBAR, OP_EMIT, OP_RESTART,
 129       OP_QUADON, OP_QUADPOP, OP_TEXBAR, OP_SUSTB, OP_SUSTP, OP_SUREDP,
 130       OP_SUREDB, OP_BAR
 131    };
 132    static const operation noPredList[] =
 133    {
 134       OP_CALL, OP_PREBREAK, OP_PRERET, OP_QUADON, OP_QUADPOP, OP_JOINAT,
 135       OP_EMIT, OP_RESTART
 136    };
 137
 138    for (i = 0; i < DATA_FILE_COUNT; ++i)
 139       nativeFileMap[i] = (DataFile)i;
 140    nativeFileMap[FILE_PREDICATE] = FILE_FLAGS;
 141
 142    for (i = 0; i < OP_LAST; ++i) {
 143       opInfo[i].variants = NULL;
 144       opInfo[i].op = (operation)i;
 145       opInfo[i].srcTypes = 1 << (int)TYPE_F32;
 146       opInfo[i].dstTypes = 1 << (int)TYPE_F32;
 147       opInfo[i].immdBits = 0xffffffff;
 148       opInfo[i].srcNr = operationSrcNr[i];
 149
 150       for (j = 0; j < opInfo[i].srcNr; ++j) {
 151          opInfo[i].srcMods[j] = 0;
 152          opInfo[i].srcFiles[j] = 1 << (int)FILE_GPR;
 153       }
 154       opInfo[i].dstMods = 0;
 155       opInfo[i].dstFiles = 1 << (int)FILE_GPR;
 156
 157       opInfo[i].hasDest = 1;
 158       opInfo[i].vector = (i >= OP_TEX && i <= OP_TEXCSAA);
 159       opInfo[i].commutative = false; /* set below */
 160       opInfo[i].pseudo = (i < OP_MOV);
 161       opInfo[i].predicate = !opInfo[i].pseudo;
 162       opInfo[i].flow = (i >= OP_BRA && i <= OP_JOIN);
 163       opInfo[i].minEncSize = 8; /* set below */
 164    }
 165    for (i = 0; i < ARRAY_SIZE(commutativeList); ++i)
 166       opInfo[commutativeList[i]].commutative = true;
 167    for (i = 0; i < ARRAY_SIZE(shortFormList); ++i)
 168       opInfo[shortFormList[i]].minEncSize = 4;
 169    for (i = 0; i < ARRAY_SIZE(noDestList); ++i)
 170       opInfo[noDestList[i]].hasDest = 0;
 171    for (i = 0; i < ARRAY_SIZE(noPredList); ++i)
 172       opInfo[noPredList[i]].predicate = 0;
 173
 174    for (i = 0; i < ARRAY_SIZE(_initProps); ++i) {
 175       const struct opProperties *prop = &_initProps[i];
 176
 177       for (int s = 0; s < 3; ++s) {
 178          if (prop->mNeg & (1 << s))
 179             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NEG;
 180          if (prop->mAbs & (1 << s))
 181             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_ABS;
 182          if (prop->mNot & (1 << s))
 183             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NOT;
 184          if (prop->fConst & (1 << s))
 185             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_CONST;
 186          if (prop->fShared & (1 << s))
 187             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_SHARED;
 188          if (prop->fAttrib & (1 << s))
 189             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_SHADER_INPUT;
 190          if (prop->fImm & (1 << s))
 191             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_IMMEDIATE;
 192       }
 193       if (prop->mSat & 8)
 194          opInfo[prop->op].dstMods = NV50_IR_MOD_SAT;
 195    }
 196
 197    if (chipset >= 0xa0)
 198       opInfo[OP_MUL].dstMods = NV50_IR_MOD_SAT;
 199 }
 200
 201 unsigned int
 202 TargetNV50::getFileSize(DataFile file) const
 203 {
 204    switch (file) {
 205    case FILE_NULL:          return 0;
 206    case FILE_GPR:           return 256; // in 16-bit units **
 207    case FILE_PREDICATE:     return 0;
 208    case FILE_FLAGS:         return 4;
 209    case FILE_ADDRESS:       return 4;
 210    case FILE_IMMEDIATE:     return 0;
 211    case FILE_MEMORY_CONST:  return 65536;
 212    case FILE_SHADER_INPUT:  return 0x200;
 213    case FILE_SHADER_OUTPUT: return 0x200;
 214    case FILE_MEMORY_BUFFER: return 0xffffffff;
 215    case FILE_MEMORY_GLOBAL: return 0xffffffff;
 216    case FILE_MEMORY_SHARED: return 16 << 10;
 217    case FILE_MEMORY_LOCAL:  return 48 << 10;
 218    case FILE_SYSTEM_VALUE:  return 16;
 219    default:
 220       assert(!"invalid file");
 221       return 0;
 222    }
 223    // ** only first 128 units encodable for 16-bit regs
 224 }
 225
 226 unsigned int
 227 TargetNV50::getFileUnit(DataFile file) const
 228 {
 229    if (file == FILE_GPR || file == FILE_ADDRESS)
 230       return 1;
 231    if (file == FILE_SYSTEM_VALUE)
 232       return 2;
 233    return 0;
 234 }
 235
 236 uint32_t
 237 TargetNV50::getSVAddress(DataFile shaderFile, const Symbol *sym) const
 238 {
 239    switch (sym->reg.data.sv.sv) {
 240    case SV_FACE:
 241       return 0x3fc;
 242    case SV_POSITION:
 243    {
 244       uint32_t addr = sysvalLocation[sym->reg.data.sv.sv];
 245       for (int c = 0; c < sym->reg.data.sv.index; ++c)
 246          if (wposMask & (1 << c))
 247             addr += 4;
 248       return addr;
 249    }
 250    case SV_PRIMITIVE_ID:
 251       return shaderFile == FILE_SHADER_INPUT ? 0x18 :
 252          sysvalLocation[sym->reg.data.sv.sv];
 253    case SV_NCTAID:
 254       return 0x8 + 2 * sym->reg.data.sv.index;
 255    case SV_CTAID:
 256       return 0xc + 2 * sym->reg.data.sv.index;
 257    case SV_NTID:
 258       return 0x2 + 2 * sym->reg.data.sv.index;
 259    case SV_TID:
 260       return 0;
 261    case SV_SAMPLE_POS:
 262       return 0; /* sample position is handled differently */
 263    default:
 264       return sysvalLocation[sym->reg.data.sv.sv];
 265    }
 266 }
 267
 268 // long:  rrr, arr, rcr, acr, rrc, arc, gcr, grr
 269 // short: rr, ar, rc, gr
 270 // immd:  ri, gi
 271 bool
 272 TargetNV50::insnCanLoad(const Instruction *i, int s,
 273                         const Instruction *ld) const
 274 {
 275    DataFile sf = ld->src(0).getFile();
 276
 277    // immediate 0 can be represented by GPR $r63/$r127
 278    if (sf == FILE_IMMEDIATE && ld->getSrc(0)->reg.data.u64 == 0)
 279       return (!i->isPseudo() &&
 280               !i->asTex() &&
 281               i->op != OP_EXPORT && i->op != OP_STORE);
 282
 283    if (sf == FILE_IMMEDIATE && (i->predSrc >= 0 || i->flagsDef >= 0))
 284       return false;
 285    if (s >= opInfo[i->op].srcNr)
 286       return false;
 287    if (!(opInfo[i->op].srcFiles[s] & (1 << (int)sf)))
 288       return false;
 289    if (s == 2 && i->src(1).getFile() != FILE_GPR)
 290       return false;
 291
 292    // NOTE: don't rely on flagsDef
 293    if (sf == FILE_IMMEDIATE)
 294       for (int d = 0; i->defExists(d); ++d)
 295          if (i->def(d).getFile() == FILE_FLAGS)
 296             return false;
 297
 298    unsigned mode = 0;
 299
 300    for (int z = 0; z < Target::operationSrcNr[i->op]; ++z) {
 301       DataFile zf = (z == s) ? sf : i->src(z).getFile();
 302       switch (zf) {
 303       case FILE_GPR:
 304          break;
 305       case FILE_MEMORY_SHARED:
 306       case FILE_SHADER_INPUT:
 307          mode |= 1 << (z * 2);
 308          break;
 309       case FILE_MEMORY_CONST:
 310          mode |= 2 << (z * 2);
 311          break;
 312       case FILE_IMMEDIATE:
 313          mode |= 3 << (z * 2);
 314       default:
 315          break;
 316       }
 317    }
 318
 319    switch (mode) {
 320    case 0x00:
 321    case 0x01:
 322    case 0x03:
 323    case 0x08:
 324    case 0x0c:
 325    case 0x20:
 326    case 0x21:
 327       break;
 328    case 0x09:
 329       // Shader inputs get transformed to p[] in geometry shaders, and those
 330       // aren't allowed to be used at the same time as c[].
 331       if (ld->bb->getProgram()->getType() == Program::TYPE_GEOMETRY)
 332          return false;
 333       break;
 334    case 0x0d:
 335       if (ld->bb->getProgram()->getType() != Program::TYPE_GEOMETRY)
 336          return false;
 337       break;
 338    default:
 339       return false;
 340    }
 341
 342    uint8_t ldSize;
 343
 344    if ((i->op == OP_MUL || i->op == OP_MAD) && !isFloatType(i->dType)) {
 345       // 32-bit MUL will be split into 16-bit MULs
 346       if (ld->src(0).isIndirect(0))
 347          return false;
 348       if (sf == FILE_IMMEDIATE)
 349          return false;
 350       if (i->subOp == NV50_IR_SUBOP_MUL_HIGH && sf == FILE_MEMORY_CONST)
 351          return false;
 352       ldSize = 2;
 353    } else {
 354       ldSize = typeSizeof(ld->dType);
 355    }
 356
 357    if (sf == FILE_IMMEDIATE)
 358       return ldSize <= 4;
 359
 360
 361    // Check if memory access is encodable:
 362
 363    if (ldSize < 4 && sf == FILE_SHADER_INPUT) // no < 4-byte aligned a[] access
 364       return false;
 365    if (ld->getSrc(0)->reg.data.offset > (int32_t)(127 * ldSize))
 366       return false;
 367
 368    if (ld->src(0).isIndirect(0)) {
 369       for (int z = 0; i->srcExists(z); ++z)
 370          if (i->src(z).isIndirect(0))
 371             return false;
 372
 373       // s[] access only possible in CP, $aX always applies
 374       if (sf == FILE_MEMORY_SHARED)
 375          return true;
 376       if (!ld->bb) // can't check type ...
 377          return false;
 378       Program::Type pt = ld->bb->getProgram()->getType();
 379
 380       // $aX applies to c[] only in VP, FP, GP if p[] is not accessed
 381       if (pt == Program::TYPE_COMPUTE)
 382          return false;
 383       if (pt == Program::TYPE_GEOMETRY) {
 384          if (sf == FILE_MEMORY_CONST)
 385             return i->src(s).getFile() != FILE_SHADER_INPUT;
 386          return sf == FILE_SHADER_INPUT;
 387       }
 388       return sf == FILE_MEMORY_CONST;
 389    }
 390    return true;
 391 }
 392
 393 bool
 394 TargetNV50::insnCanLoadOffset(const Instruction *i, int s, int offset) const
 395 {
 396    if (!i->src(s).isIndirect(0))
 397       return true;
 398    offset += i->src(s).get()->reg.data.offset;
 399    if (i->op == OP_LOAD || i->op == OP_STORE) {
 400       // There are some restrictions in theory, but in practice they're never
 401       // going to be hit. When we enable shared/global memory, this will
 402       // become more important.
 403       return true;
 404    }
 405    return offset >= 0 && offset <= (int32_t)(127 * i->src(s).get()->reg.size);
 406 }
 407
 408 bool
 409 TargetNV50::isAccessSupported(DataFile file, DataType ty) const
 410 {
 411    if (ty == TYPE_B96 || ty == TYPE_NONE)
 412       return false;
 413    if (typeSizeof(ty) > 4)
 414       return (file == FILE_MEMORY_LOCAL) || (file == FILE_MEMORY_GLOBAL) ||
 415              (file == FILE_MEMORY_BUFFER);
 416    return true;
 417 }
 418
 419 bool
 420 TargetNV50::isOpSupported(operation op, DataType ty) const
 421 {
 422    if (ty == TYPE_F64 && chipset < 0xa0)
 423       return false;
 424
 425    switch (op) {
 426    case OP_PRERET:
 427       return chipset >= 0xa0;
 428    case OP_TXG:
 429       return chipset >= 0xa3 && chipset != 0xaa && chipset != 0xac;
 430    case OP_POW:
 431    case OP_SQRT:
 432    case OP_DIV:
 433    case OP_MOD:
 434    case OP_SET_AND:
 435    case OP_SET_OR:
 436    case OP_SET_XOR:
 437    case OP_SLCT:
 438    case OP_SELP:
 439    case OP_POPCNT:
 440    case OP_INSBF:
 441    case OP_EXTBF:
 442    case OP_EXIT: // want exit modifier instead (on NOP if required)
 443    case OP_MEMBAR:
 444    case OP_SHLADD:
 445       return false;
 446    case OP_SAD:
 447       return ty == TYPE_S32;
 448    case OP_SET:
 449       return !isFloatType(ty);
 450    default:
 451       return true;
 452    }
 453 }
 454
 455 bool
 456 TargetNV50::isModSupported(const Instruction *insn, int s, Modifier mod) const
 457 {
 458    if (!isFloatType(insn->dType)) {
 459       switch (insn->op) {
 460       case OP_ABS:
 461       case OP_NEG:
 462       case OP_CVT:
 463       case OP_CEIL:
 464       case OP_FLOOR:
 465       case OP_TRUNC:
 466       case OP_AND:
 467       case OP_OR:
 468       case OP_XOR:
 469          break;
 470       case OP_ADD:
 471          if (insn->src(s ? 0 : 1).mod.neg())
 472             return false;
 473          break;
 474       case OP_SUB:
 475          if (s == 0)
 476             return insn->src(1).mod.neg() ? false : true;
 477          break;
 478       case OP_SET:
 479          if (insn->sType != TYPE_F32)
 480             return false;
 481          break;
 482       default:
 483          return false;
 484       }
 485    }
 486    if (s >= opInfo[insn->op].srcNr || s >= 3)
 487       return false;
 488    return (mod & Modifier(opInfo[insn->op].srcMods[s])) == mod;
 489 }
 490
 491 bool
 492 TargetNV50::mayPredicate(const Instruction *insn, const Value *pred) const
 493 {
 494    if (insn->getPredicate() || insn->flagsSrc >= 0)
 495       return false;
 496    for (int s = 0; insn->srcExists(s); ++s)
 497       if (insn->src(s).getFile() == FILE_IMMEDIATE)
 498          return false;
 499    return opInfo[insn->op].predicate;
 500 }
 501
 502 bool
 503 TargetNV50::isSatSupported(const Instruction *insn) const
 504 {
 505    if (insn->op == OP_CVT)
 506       return true;
 507    if (insn->dType != TYPE_F32)
 508       return false;
 509    return opInfo[insn->op].dstMods & NV50_IR_MOD_SAT;
 510 }
 511
 512 int TargetNV50::getLatency(const Instruction *i) const
 513 {
 514    // TODO: tune these values
 515    if (i->op == OP_LOAD) {
 516       switch (i->src(0).getFile()) {
 517       case FILE_MEMORY_LOCAL:
 518       case FILE_MEMORY_GLOBAL:
 519       case FILE_MEMORY_BUFFER:
 520          return 100; // really 400 to 800
 521       default:
 522          return 22;
 523       }
 524    }
 525    return 22;
 526 }
 527
 528 // These are "inverse" throughput values, i.e. the number of cycles required
 529 // to issue a specific instruction for a full warp (32 threads).
 530 //
 531 // Assuming we have more than 1 warp in flight, a higher issue latency results
 532 // in a lower result latency since the MP will have spent more time with other
 533 // warps.
 534 // This also helps to determine the number of cycles between instructions in
 535 // a single warp.
 536 //
 537 int TargetNV50::getThroughput(const Instruction *i) const
 538 {
 539    // TODO: tune these values
 540    if (i->dType == TYPE_F32) {
 541       switch (i->op) {
 542       case OP_RCP:
 543       case OP_RSQ:
 544       case OP_LG2:
 545       case OP_SIN:
 546       case OP_COS:
 547       case OP_PRESIN:
 548       case OP_PREEX2:
 549          return 16;
 550       default:
 551          return 4;
 552       }
 553    } else
 554    if (i->dType == TYPE_U32 || i->dType == TYPE_S32) {
 555       return 4;
 556    } else
 557    if (i->dType == TYPE_F64) {
 558       return 32;
 559    } else {
 560       return 1;
 561    }
 562 }
 563
 564 static void
 565 recordLocation(uint16_t *locs, uint8_t *masks,
 566                const struct nv50_ir_varying *var)
 567 {
 568    uint16_t addr = var->slot[0] * 4;
 569
 570    switch (var->sn) {
 571    case TGSI_SEMANTIC_POSITION: locs[SV_POSITION] = addr; break;
 572    case TGSI_SEMANTIC_INSTANCEID: locs[SV_INSTANCE_ID] = addr; break;
 573    case TGSI_SEMANTIC_VERTEXID: locs[SV_VERTEX_ID] = addr; break;
 574    case TGSI_SEMANTIC_PRIMID: locs[SV_PRIMITIVE_ID] = addr; break;
 575    case TGSI_SEMANTIC_LAYER: locs[SV_LAYER] = addr; break;
 576    case TGSI_SEMANTIC_VIEWPORT_INDEX: locs[SV_VIEWPORT_INDEX] = addr; break;
 577    default:
 578       break;
 579    }
 580    if (var->sn == TGSI_SEMANTIC_POSITION && masks)
 581       masks[0] = var->mask;
 582 }
 583
 584 void
 585 TargetNV50::parseDriverInfo(const struct nv50_ir_prog_info *info)
 586 {
 587    unsigned int i;
 588    for (i = 0; i < info->numOutputs; ++i)
 589       recordLocation(sysvalLocation, NULL, &info->out[i]);
 590    for (i = 0; i < info->numInputs; ++i)
 591       recordLocation(sysvalLocation, &wposMask, &info->in[i]);
 592    for (i = 0; i < info->numSysVals; ++i)
 593       recordLocation(sysvalLocation, NULL, &info->sv[i]);
 594
 595    if (sysvalLocation[SV_POSITION] >= 0x200) {
 596       // not assigned by driver, but we need it internally
 597       wposMask = 0x8;
 598       sysvalLocation[SV_POSITION] = 0;
 599    }
 600
 601    Target::parseDriverInfo(info);
 602 }
 603
 604 } // namespace nv50_ir