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 uint32_t commutative[(OP_LAST + 31) / 32] =
 115    {
 116       // ADD,MAD,MUL,AND,OR,XOR,MAX,MIN
 117       0x0670ca00, 0x0000003f, 0x00000000, 0x00000000
 118    };
 119    static const uint32_t shortForm[(OP_LAST + 31) / 32] =
 120    {
 121       // MOV,ADD,SUB,MUL,MAD,SAD,L/PINTERP,RCP,TEX,TXF
 122       0x00014e40, 0x00000040, 0x00000930, 0x00000000
 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 = (commutative[i / 32] >> (i % 32)) & 1;
 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 = (shortForm[i / 32] & (1 << (i % 32))) ? 4 : 8;
 164    }
 165    for (i = 0; i < sizeof(noDestList) / sizeof(noDestList[0]); ++i)
 166       opInfo[noDestList[i]].hasDest = 0;
 167    for (i = 0; i < sizeof(noPredList) / sizeof(noPredList[0]); ++i)
 168       opInfo[noPredList[i]].predicate = 0;
 169
 170    for (i = 0; i < sizeof(_initProps) / sizeof(_initProps[0]); ++i) {
 171       const struct opProperties *prop = &_initProps[i];
 172
 173       for (int s = 0; s < 3; ++s) {
 174          if (prop->mNeg & (1 << s))
 175             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NEG;
 176          if (prop->mAbs & (1 << s))
 177             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_ABS;
 178          if (prop->mNot & (1 << s))
 179             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NOT;
 180          if (prop->fConst & (1 << s))
 181             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_CONST;
 182          if (prop->fShared & (1 << s))
 183             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_SHARED;
 184          if (prop->fAttrib & (1 << s))
 185             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_SHADER_INPUT;
 186          if (prop->fImm & (1 << s))
 187             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_IMMEDIATE;
 188       }
 189       if (prop->mSat & 8)
 190          opInfo[prop->op].dstMods = NV50_IR_MOD_SAT;
 191    }
 192
 193    if (chipset >= 0xa0)
 194       opInfo[OP_MUL].dstMods = NV50_IR_MOD_SAT;
 195 }
 196
 197 unsigned int
 198 TargetNV50::getFileSize(DataFile file) const
 199 {
 200    switch (file) {
 201    case FILE_NULL:          return 0;
 202    case FILE_GPR:           return 256; // in 16-bit units **
 203    case FILE_PREDICATE:     return 0;
 204    case FILE_FLAGS:         return 4;
 205    case FILE_ADDRESS:       return 4;
 206    case FILE_IMMEDIATE:     return 0;
 207    case FILE_MEMORY_CONST:  return 65536;
 208    case FILE_SHADER_INPUT:  return 0x200;
 209    case FILE_SHADER_OUTPUT: return 0x200;
 210    case FILE_MEMORY_BUFFER: return 0xffffffff;
 211    case FILE_MEMORY_GLOBAL: return 0xffffffff;
 212    case FILE_MEMORY_SHARED: return 16 << 10;
 213    case FILE_MEMORY_LOCAL:  return 48 << 10;
 214    case FILE_SYSTEM_VALUE:  return 16;
 215    default:
 216       assert(!"invalid file");
 217       return 0;
 218    }
 219    // ** only first 128 units encodable for 16-bit regs
 220 }
 221
 222 unsigned int
 223 TargetNV50::getFileUnit(DataFile file) const
 224 {
 225    if (file == FILE_GPR || file == FILE_ADDRESS)
 226       return 1;
 227    if (file == FILE_SYSTEM_VALUE)
 228       return 2;
 229    return 0;
 230 }
 231
 232 uint32_t
 233 TargetNV50::getSVAddress(DataFile shaderFile, const Symbol *sym) const
 234 {
 235    switch (sym->reg.data.sv.sv) {
 236    case SV_FACE:
 237       return 0x3fc;
 238    case SV_POSITION:
 239    {
 240       uint32_t addr = sysvalLocation[sym->reg.data.sv.sv];
 241       for (int c = 0; c < sym->reg.data.sv.index; ++c)
 242          if (wposMask & (1 << c))
 243             addr += 4;
 244       return addr;
 245    }
 246    case SV_PRIMITIVE_ID:
 247       return shaderFile == FILE_SHADER_INPUT ? 0x18 :
 248          sysvalLocation[sym->reg.data.sv.sv];
 249    case SV_NCTAID:
 250       return 0x8 + 2 * sym->reg.data.sv.index;
 251    case SV_CTAID:
 252       return 0xc + 2 * sym->reg.data.sv.index;
 253    case SV_NTID:
 254       return 0x2 + 2 * sym->reg.data.sv.index;
 255    case SV_TID:
 256       return 0;
 257    case SV_SAMPLE_POS:
 258       return 0; /* sample position is handled differently */
 259    default:
 260       return sysvalLocation[sym->reg.data.sv.sv];
 261    }
 262 }
 263
 264 // long:  rrr, arr, rcr, acr, rrc, arc, gcr, grr
 265 // short: rr, ar, rc, gr
 266 // immd:  ri, gi
 267 bool
 268 TargetNV50::insnCanLoad(const Instruction *i, int s,
 269                         const Instruction *ld) const
 270 {
 271    DataFile sf = ld->src(0).getFile();
 272
 273    // immediate 0 can be represented by GPR $r63/$r127
 274    if (sf == FILE_IMMEDIATE && ld->getSrc(0)->reg.data.u64 == 0)
 275       return (!i->isPseudo() &&
 276               !i->asTex() &&
 277               i->op != OP_EXPORT && i->op != OP_STORE);
 278
 279    if (sf == FILE_IMMEDIATE && (i->predSrc >= 0 || i->flagsDef >= 0))
 280       return false;
 281    if (s >= opInfo[i->op].srcNr)
 282       return false;
 283    if (!(opInfo[i->op].srcFiles[s] & (1 << (int)sf)))
 284       return false;
 285    if (s == 2 && i->src(1).getFile() != FILE_GPR)
 286       return false;
 287
 288    // NOTE: don't rely on flagsDef
 289    if (sf == FILE_IMMEDIATE)
 290       for (int d = 0; i->defExists(d); ++d)
 291          if (i->def(d).getFile() == FILE_FLAGS)
 292             return false;
 293
 294    unsigned mode = 0;
 295
 296    for (int z = 0; z < Target::operationSrcNr[i->op]; ++z) {
 297       DataFile zf = (z == s) ? sf : i->src(z).getFile();
 298       switch (zf) {
 299       case FILE_GPR:
 300          break;
 301       case FILE_MEMORY_SHARED:
 302       case FILE_SHADER_INPUT:
 303          mode |= 1 << (z * 2);
 304          break;
 305       case FILE_MEMORY_CONST:
 306          mode |= 2 << (z * 2);
 307          break;
 308       case FILE_IMMEDIATE:
 309          mode |= 3 << (z * 2);
 310       default:
 311          break;
 312       }
 313    }
 314
 315    switch (mode) {
 316    case 0x00:
 317    case 0x01:
 318    case 0x03:
 319    case 0x08:
 320    case 0x0c:
 321    case 0x20:
 322    case 0x21:
 323       break;
 324    case 0x09:
 325       // Shader inputs get transformed to p[] in geometry shaders, and those
 326       // aren't allowed to be used at the same time as c[].
 327       if (ld->bb->getProgram()->getType() == Program::TYPE_GEOMETRY)
 328          return false;
 329       break;
 330    case 0x0d:
 331       if (ld->bb->getProgram()->getType() != Program::TYPE_GEOMETRY)
 332          return false;
 333       break;
 334    default:
 335       return false;
 336    }
 337
 338    uint8_t ldSize;
 339
 340    if ((i->op == OP_MUL || i->op == OP_MAD) && !isFloatType(i->dType)) {
 341       // 32-bit MUL will be split into 16-bit MULs
 342       if (ld->src(0).isIndirect(0))
 343          return false;
 344       if (sf == FILE_IMMEDIATE)
 345          return false;
 346       if (i->subOp == NV50_IR_SUBOP_MUL_HIGH && sf == FILE_MEMORY_CONST)
 347          return false;
 348       ldSize = 2;
 349    } else {
 350       ldSize = typeSizeof(ld->dType);
 351    }
 352
 353    if (sf == FILE_IMMEDIATE)
 354       return ldSize <= 4;
 355
 356
 357    // Check if memory access is encodable:
 358
 359    if (ldSize < 4 && sf == FILE_SHADER_INPUT) // no < 4-byte aligned a[] access
 360       return false;
 361    if (ld->getSrc(0)->reg.data.offset > (int32_t)(127 * ldSize))
 362       return false;
 363
 364    if (ld->src(0).isIndirect(0)) {
 365       for (int z = 0; i->srcExists(z); ++z)
 366          if (i->src(z).isIndirect(0))
 367             return false;
 368
 369       // s[] access only possible in CP, $aX always applies
 370       if (sf == FILE_MEMORY_SHARED)
 371          return true;
 372       if (!ld->bb) // can't check type ...
 373          return false;
 374       Program::Type pt = ld->bb->getProgram()->getType();
 375
 376       // $aX applies to c[] only in VP, FP, GP if p[] is not accessed
 377       if (pt == Program::TYPE_COMPUTE)
 378          return false;
 379       if (pt == Program::TYPE_GEOMETRY) {
 380          if (sf == FILE_MEMORY_CONST)
 381             return i->src(s).getFile() != FILE_SHADER_INPUT;
 382          return sf == FILE_SHADER_INPUT;
 383       }
 384       return sf == FILE_MEMORY_CONST;
 385    }
 386    return true;
 387 }
 388
 389 bool
 390 TargetNV50::insnCanLoadOffset(const Instruction *i, int s, int offset) const
 391 {
 392    if (!i->src(s).isIndirect(0))
 393       return true;
 394    offset += i->src(s).get()->reg.data.offset;
 395    if (i->op == OP_LOAD || i->op == OP_STORE) {
 396       // There are some restrictions in theory, but in practice they're never
 397       // going to be hit. When we enable shared/global memory, this will
 398       // become more important.
 399       return true;
 400    }
 401    return offset >= 0 && offset <= (int32_t)(127 * i->src(s).get()->reg.size);
 402 }
 403
 404 bool
 405 TargetNV50::isAccessSupported(DataFile file, DataType ty) const
 406 {
 407    if (ty == TYPE_B96 || ty == TYPE_NONE)
 408       return false;
 409    if (typeSizeof(ty) > 4)
 410       return (file == FILE_MEMORY_LOCAL) || (file == FILE_MEMORY_GLOBAL) ||
 411              (file == FILE_MEMORY_BUFFER);
 412    return true;
 413 }
 414
 415 bool
 416 TargetNV50::isOpSupported(operation op, DataType ty) const
 417 {
 418    if (ty == TYPE_F64 && chipset < 0xa0)
 419       return false;
 420
 421    switch (op) {
 422    case OP_PRERET:
 423       return chipset >= 0xa0;
 424    case OP_TXG:
 425       return chipset >= 0xa3 && chipset != 0xaa && chipset != 0xac;
 426    case OP_POW:
 427    case OP_SQRT:
 428    case OP_DIV:
 429    case OP_MOD:
 430    case OP_SET_AND:
 431    case OP_SET_OR:
 432    case OP_SET_XOR:
 433    case OP_SLCT:
 434    case OP_SELP:
 435    case OP_POPCNT:
 436    case OP_INSBF:
 437    case OP_EXTBF:
 438    case OP_EXIT: // want exit modifier instead (on NOP if required)
 439    case OP_MEMBAR:
 440       return false;
 441    case OP_SAD:
 442       return ty == TYPE_S32;
 443    case OP_SET:
 444       return !isFloatType(ty);
 445    default:
 446       return true;
 447    }
 448 }
 449
 450 bool
 451 TargetNV50::isModSupported(const Instruction *insn, int s, Modifier mod) const
 452 {
 453    if (!isFloatType(insn->dType)) {
 454       switch (insn->op) {
 455       case OP_ABS:
 456       case OP_NEG:
 457       case OP_CVT:
 458       case OP_CEIL:
 459       case OP_FLOOR:
 460       case OP_TRUNC:
 461       case OP_AND:
 462       case OP_OR:
 463       case OP_XOR:
 464          break;
 465       case OP_ADD:
 466          if (insn->src(s ? 0 : 1).mod.neg())
 467             return false;
 468          break;
 469       case OP_SUB:
 470          if (s == 0)
 471             return insn->src(1).mod.neg() ? false : true;
 472          break;
 473       case OP_SET:
 474          if (insn->sType != TYPE_F32)
 475             return false;
 476          break;
 477       default:
 478          return false;
 479       }
 480    }
 481    if (s >= opInfo[insn->op].srcNr || s >= 3)
 482       return false;
 483    return (mod & Modifier(opInfo[insn->op].srcMods[s])) == mod;
 484 }
 485
 486 bool
 487 TargetNV50::mayPredicate(const Instruction *insn, const Value *pred) const
 488 {
 489    if (insn->getPredicate() || insn->flagsSrc >= 0)
 490       return false;
 491    for (int s = 0; insn->srcExists(s); ++s)
 492       if (insn->src(s).getFile() == FILE_IMMEDIATE)
 493          return false;
 494    return opInfo[insn->op].predicate;
 495 }
 496
 497 bool
 498 TargetNV50::isSatSupported(const Instruction *insn) const
 499 {
 500    if (insn->op == OP_CVT)
 501       return true;
 502    if (insn->dType != TYPE_F32)
 503       return false;
 504    return opInfo[insn->op].dstMods & NV50_IR_MOD_SAT;
 505 }
 506
 507 int TargetNV50::getLatency(const Instruction *i) const
 508 {
 509    // TODO: tune these values
 510    if (i->op == OP_LOAD) {
 511       switch (i->src(0).getFile()) {
 512       case FILE_MEMORY_LOCAL:
 513       case FILE_MEMORY_GLOBAL:
 514       case FILE_MEMORY_BUFFER:
 515          return 100; // really 400 to 800
 516       default:
 517          return 22;
 518       }
 519    }
 520    return 22;
 521 }
 522
 523 // These are "inverse" throughput values, i.e. the number of cycles required
 524 // to issue a specific instruction for a full warp (32 threads).
 525 //
 526 // Assuming we have more than 1 warp in flight, a higher issue latency results
 527 // in a lower result latency since the MP will have spent more time with other
 528 // warps.
 529 // This also helps to determine the number of cycles between instructions in
 530 // a single warp.
 531 //
 532 int TargetNV50::getThroughput(const Instruction *i) const
 533 {
 534    // TODO: tune these values
 535    if (i->dType == TYPE_F32) {
 536       switch (i->op) {
 537       case OP_RCP:
 538       case OP_RSQ:
 539       case OP_LG2:
 540       case OP_SIN:
 541       case OP_COS:
 542       case OP_PRESIN:
 543       case OP_PREEX2:
 544          return 16;
 545       default:
 546          return 4;
 547       }
 548    } else
 549    if (i->dType == TYPE_U32 || i->dType == TYPE_S32) {
 550       return 4;
 551    } else
 552    if (i->dType == TYPE_F64) {
 553       return 32;
 554    } else {
 555       return 1;
 556    }
 557 }
 558
 559 static void
 560 recordLocation(uint16_t *locs, uint8_t *masks,
 561                const struct nv50_ir_varying *var)
 562 {
 563    uint16_t addr = var->slot[0] * 4;
 564
 565    switch (var->sn) {
 566    case TGSI_SEMANTIC_POSITION: locs[SV_POSITION] = addr; break;
 567    case TGSI_SEMANTIC_INSTANCEID: locs[SV_INSTANCE_ID] = addr; break;
 568    case TGSI_SEMANTIC_VERTEXID: locs[SV_VERTEX_ID] = addr; break;
 569    case TGSI_SEMANTIC_PRIMID: locs[SV_PRIMITIVE_ID] = addr; break;
 570    case TGSI_SEMANTIC_LAYER: locs[SV_LAYER] = addr; break;
 571    case TGSI_SEMANTIC_VIEWPORT_INDEX: locs[SV_VIEWPORT_INDEX] = addr; break;
 572    default:
 573       break;
 574    }
 575    if (var->sn == TGSI_SEMANTIC_POSITION && masks)
 576       masks[0] = var->mask;
 577 }
 578
 579 void
 580 TargetNV50::parseDriverInfo(const struct nv50_ir_prog_info *info)
 581 {
 582    unsigned int i;
 583    for (i = 0; i < info->numOutputs; ++i)
 584       recordLocation(sysvalLocation, NULL, &info->out[i]);
 585    for (i = 0; i < info->numInputs; ++i)
 586       recordLocation(sysvalLocation, &wposMask, &info->in[i]);
 587    for (i = 0; i < info->numSysVals; ++i)
 588       recordLocation(sysvalLocation, NULL, &info->sv[i]);
 589
 590    if (sysvalLocation[SV_POSITION] >= 0x200) {
 591       // not assigned by driver, but we need it internally
 592       wposMask = 0x8;
 593       sysvalLocation[SV_POSITION] = 0;
 594    }
 595 }
 596
 597 } // namespace nv50_ir