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  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_LG2,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
  103.    { OP_RCP,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
  104.    { OP_RSQ,    0x1, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
  105.    { OP_DFDX,   0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
  106.    { OP_DFDY,   0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 },
  107. };
  108.  
  109. void TargetNV50::initOpInfo()
  110. {
  111.    unsigned int i, j;
  112.  
  113.    static const uint32_t commutative[(OP_LAST + 31) / 32] =
  114.    {
  115.       // ADD,MAD,MUL,AND,OR,XOR,MAX,MIN
  116.       0x0670ca00, 0x0000003f, 0x00000000, 0x00000000
  117.    };
  118.    static const uint32_t shortForm[(OP_LAST + 31) / 32] =
  119.    {
  120.       // MOV,ADD,SUB,MUL,MAD,SAD,L/PINTERP,RCP,TEX,TXF
  121.       0x00014e40, 0x00000040, 0x00000498, 0x00000000
  122.    };
  123.    static const operation noDestList[] =
  124.    {
  125.       OP_STORE, OP_WRSV, OP_EXPORT, OP_BRA, OP_CALL, OP_RET, OP_EXIT,
  126.       OP_DISCARD, OP_CONT, OP_BREAK, OP_PRECONT, OP_PREBREAK, OP_PRERET,
  127.       OP_JOIN, OP_JOINAT, OP_BRKPT, OP_MEMBAR, OP_EMIT, OP_RESTART,
  128.       OP_QUADON, OP_QUADPOP, OP_TEXBAR, OP_SUSTB, OP_SUSTP, OP_SUREDP,
  129.       OP_SUREDB, OP_BAR
  130.    };
  131.    static const operation noPredList[] =
  132.    {
  133.       OP_CALL, OP_PREBREAK, OP_PRERET, OP_QUADON, OP_QUADPOP, OP_JOINAT,
  134.       OP_EMIT, OP_RESTART
  135.    };
  136.  
  137.    for (i = 0; i < DATA_FILE_COUNT; ++i)
  138.       nativeFileMap[i] = (DataFile)i;
  139.    nativeFileMap[FILE_PREDICATE] = FILE_FLAGS;
  140.  
  141.    for (i = 0; i < OP_LAST; ++i) {
  142.       opInfo[i].variants = NULL;
  143.       opInfo[i].op = (operation)i;
  144.       opInfo[i].srcTypes = 1 << (int)TYPE_F32;
  145.       opInfo[i].dstTypes = 1 << (int)TYPE_F32;
  146.       opInfo[i].immdBits = 0xffffffff;
  147.       opInfo[i].srcNr = operationSrcNr[i];
  148.  
  149.       for (j = 0; j < opInfo[i].srcNr; ++j) {
  150.          opInfo[i].srcMods[j] = 0;
  151.          opInfo[i].srcFiles[j] = 1 << (int)FILE_GPR;
  152.       }
  153.       opInfo[i].dstMods = 0;
  154.       opInfo[i].dstFiles = 1 << (int)FILE_GPR;
  155.  
  156.       opInfo[i].hasDest = 1;
  157.       opInfo[i].vector = (i >= OP_TEX && i <= OP_TEXCSAA);
  158.       opInfo[i].commutative = (commutative[i / 32] >> (i % 32)) & 1;
  159.       opInfo[i].pseudo = (i < OP_MOV);
  160.       opInfo[i].predicate = !opInfo[i].pseudo;
  161.       opInfo[i].flow = (i >= OP_BRA && i <= OP_JOIN);
  162.       opInfo[i].minEncSize = (shortForm[i / 32] & (1 << (i % 32))) ? 4 : 8;
  163.    }
  164.    for (i = 0; i < sizeof(noDestList) / sizeof(noDestList[0]); ++i)
  165.       opInfo[noDestList[i]].hasDest = 0;
  166.    for (i = 0; i < sizeof(noPredList) / sizeof(noPredList[0]); ++i)
  167.       opInfo[noPredList[i]].predicate = 0;
  168.  
  169.    for (i = 0; i < sizeof(_initProps) / sizeof(_initProps[0]); ++i) {
  170.       const struct opProperties *prop = &_initProps[i];
  171.  
  172.       for (int s = 0; s < 3; ++s) {
  173.          if (prop->mNeg & (1 << s))
  174.             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NEG;
  175.          if (prop->mAbs & (1 << s))
  176.             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_ABS;
  177.          if (prop->mNot & (1 << s))
  178.             opInfo[prop->op].srcMods[s] |= NV50_IR_MOD_NOT;
  179.          if (prop->fConst & (1 << s))
  180.             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_CONST;
  181.          if (prop->fShared & (1 << s))
  182.             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_MEMORY_SHARED;
  183.          if (prop->fAttrib & (1 << s))
  184.             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_SHADER_INPUT;
  185.          if (prop->fImm & (1 << s))
  186.             opInfo[prop->op].srcFiles[s] |= 1 << (int)FILE_IMMEDIATE;
  187.       }
  188.       if (prop->mSat & 8)
  189.          opInfo[prop->op].dstMods = NV50_IR_MOD_SAT;
  190.    }
  191.  
  192.    if (chipset >= 0xa0)
  193.       opInfo[OP_MUL].dstMods = NV50_IR_MOD_SAT;
  194. }
  195.  
  196. unsigned int
  197. TargetNV50::getFileSize(DataFile file) const
  198. {
  199.    switch (file) {
  200.    case FILE_NULL:          return 0;
  201.    case FILE_GPR:           return 256; // in 16-bit units **
  202.    case FILE_PREDICATE:     return 0;
  203.    case FILE_FLAGS:         return 4;
  204.    case FILE_ADDRESS:       return 4;
  205.    case FILE_IMMEDIATE:     return 0;
  206.    case FILE_MEMORY_CONST:  return 65536;
  207.    case FILE_SHADER_INPUT:  return 0x200;
  208.    case FILE_SHADER_OUTPUT: return 0x200;
  209.    case FILE_MEMORY_GLOBAL: return 0xffffffff;
  210.    case FILE_MEMORY_SHARED: return 16 << 10;
  211.    case FILE_MEMORY_LOCAL:  return 48 << 10;
  212.    case FILE_SYSTEM_VALUE:  return 16;
  213.    default:
  214.       assert(!"invalid file");
  215.       return 0;
  216.    }
  217.    // ** only first 128 units encodable for 16-bit regs
  218. }
  219.  
  220. unsigned int
  221. TargetNV50::getFileUnit(DataFile file) const
  222. {
  223.    if (file == FILE_GPR || file == FILE_ADDRESS)
  224.       return 1;
  225.    if (file == FILE_SYSTEM_VALUE)
  226.       return 2;
  227.    return 0;
  228. }
  229.  
  230. uint32_t
  231. TargetNV50::getSVAddress(DataFile shaderFile, const Symbol *sym) const
  232. {
  233.    switch (sym->reg.data.sv.sv) {
  234.    case SV_FACE:
  235.       return 0x3fc;
  236.    case SV_POSITION:
  237.    {
  238.       uint32_t addr = sysvalLocation[sym->reg.data.sv.sv];
  239.       for (int c = 0; c < sym->reg.data.sv.index; ++c)
  240.          if (wposMask & (1 << c))
  241.             addr += 4;
  242.       return addr;
  243.    }
  244.    case SV_PRIMITIVE_ID:
  245.       return shaderFile == FILE_SHADER_INPUT ? 0x18 :
  246.          sysvalLocation[sym->reg.data.sv.sv];
  247.    case SV_NCTAID:
  248.       return 0x8 + 2 * sym->reg.data.sv.index;
  249.    case SV_CTAID:
  250.       return 0xc + 2 * sym->reg.data.sv.index;
  251.    case SV_NTID:
  252.       return 0x2 + 2 * sym->reg.data.sv.index;
  253.    case SV_TID:
  254.       return 0;
  255.    case SV_SAMPLE_POS:
  256.       return 0; /* sample position is handled differently */
  257.    default:
  258.       return sysvalLocation[sym->reg.data.sv.sv];
  259.    }
  260. }
  261.  
  262. // long:  rrr, arr, rcr, acr, rrc, arc, gcr, grr
  263. // short: rr, ar, rc, gr
  264. // immd:  ri, gi
  265. bool
  266. TargetNV50::insnCanLoad(const Instruction *i, int s,
  267.                         const Instruction *ld) const
  268. {
  269.    DataFile sf = ld->src(0).getFile();
  270.  
  271.    if (sf == FILE_IMMEDIATE && (i->predSrc >= 0 || i->flagsDef >= 0))
  272.       return false;
  273.    if (s >= opInfo[i->op].srcNr)
  274.       return false;
  275.    if (!(opInfo[i->op].srcFiles[s] & (1 << (int)sf)))
  276.       return false;
  277.    if (s == 2 && i->src(1).getFile() != FILE_GPR)
  278.       return false;
  279.  
  280.    // NOTE: don't rely on flagsDef
  281.    if (sf == FILE_IMMEDIATE)
  282.       for (int d = 0; i->defExists(d); ++d)
  283.          if (i->def(d).getFile() == FILE_FLAGS)
  284.             return false;
  285.  
  286.    unsigned mode = 0;
  287.  
  288.    for (int z = 0; z < Target::operationSrcNr[i->op]; ++z) {
  289.       DataFile zf = (z == s) ? sf : i->src(z).getFile();
  290.       switch (zf) {
  291.       case FILE_GPR:
  292.          break;
  293.       case FILE_MEMORY_SHARED:
  294.       case FILE_SHADER_INPUT:
  295.          mode |= 1 << (z * 2);
  296.          break;
  297.       case FILE_MEMORY_CONST:
  298.          mode |= 2 << (z * 2);
  299.          break;
  300.       case FILE_IMMEDIATE:
  301.          mode |= 3 << (z * 2);
  302.       default:
  303.          break;
  304.       }
  305.    }
  306.  
  307.    switch (mode) {
  308.    case 0x00:
  309.    case 0x01:
  310.    case 0x03:
  311.    case 0x08:
  312.    case 0x0c:
  313.    case 0x20:
  314.    case 0x21:
  315.       break;
  316.    case 0x09:
  317.       // Shader inputs get transformed to p[] in geometry shaders, and those
  318.       // aren't allowed to be used at the same time as c[].
  319.       if (ld->bb->getProgram()->getType() == Program::TYPE_GEOMETRY)
  320.          return false;
  321.       break;
  322.    case 0x0d:
  323.       if (ld->bb->getProgram()->getType() != Program::TYPE_GEOMETRY)
  324.          return false;
  325.       break;
  326.    default:
  327.       return false;
  328.    }
  329.  
  330.    uint8_t ldSize;
  331.  
  332.    if ((i->op == OP_MUL || i->op == OP_MAD) && !isFloatType(i->dType)) {
  333.       // 32-bit MUL will be split into 16-bit MULs
  334.       if (ld->src(0).isIndirect(0))
  335.          return false;
  336.       if (sf == FILE_IMMEDIATE)
  337.          return false;
  338.       if (i->subOp == NV50_IR_SUBOP_MUL_HIGH && sf == FILE_MEMORY_CONST)
  339.          return false;
  340.       ldSize = 2;
  341.    } else {
  342.       ldSize = typeSizeof(ld->dType);
  343.    }
  344.  
  345.    if (sf == FILE_IMMEDIATE)
  346.       return true;
  347.  
  348.  
  349.    // Check if memory access is encodable:
  350.  
  351.    if (ldSize < 4 && sf == FILE_SHADER_INPUT) // no < 4-byte aligned a[] access
  352.       return false;
  353.    if (ld->getSrc(0)->reg.data.offset > (int32_t)(127 * ldSize))
  354.       return false;
  355.  
  356.    if (ld->src(0).isIndirect(0)) {
  357.       for (int z = 0; i->srcExists(z); ++z)
  358.          if (i->src(z).isIndirect(0))
  359.             return false;
  360.  
  361.       // s[] access only possible in CP, $aX always applies
  362.       if (sf == FILE_MEMORY_SHARED)
  363.          return true;
  364.       if (!ld->bb) // can't check type ...
  365.          return false;
  366.       Program::Type pt = ld->bb->getProgram()->getType();
  367.  
  368.       // $aX applies to c[] only in VP, FP, GP if p[] is not accessed
  369.       if (pt == Program::TYPE_COMPUTE)
  370.          return false;
  371.       if (pt == Program::TYPE_GEOMETRY) {
  372.          if (sf == FILE_MEMORY_CONST)
  373.             return i->src(s).getFile() != FILE_SHADER_INPUT;
  374.          return sf == FILE_SHADER_INPUT;
  375.       }
  376.       return sf == FILE_MEMORY_CONST;
  377.    }
  378.    return true;
  379. }
  380.  
  381. bool
  382. TargetNV50::isAccessSupported(DataFile file, DataType ty) const
  383. {
  384.    if (ty == TYPE_B96 || ty == TYPE_NONE)
  385.       return false;
  386.    if (typeSizeof(ty) > 4)
  387.       return (file == FILE_MEMORY_LOCAL) || (file == FILE_MEMORY_GLOBAL);
  388.    return true;
  389. }
  390.  
  391. bool
  392. TargetNV50::isOpSupported(operation op, DataType ty) const
  393. {
  394.    if (ty == TYPE_F64 && chipset < 0xa0)
  395.       return false;
  396.  
  397.    switch (op) {
  398.    case OP_PRERET:
  399.       return chipset >= 0xa0;
  400.    case OP_TXG:
  401.       return chipset >= 0xa3 && chipset != 0xaa && chipset != 0xac;
  402.    case OP_POW:
  403.    case OP_SQRT:
  404.    case OP_DIV:
  405.    case OP_MOD:
  406.    case OP_SET_AND:
  407.    case OP_SET_OR:
  408.    case OP_SET_XOR:
  409.    case OP_SLCT:
  410.    case OP_SELP:
  411.    case OP_POPCNT:
  412.    case OP_INSBF:
  413.    case OP_EXTBF:
  414.    case OP_EXIT: // want exit modifier instead (on NOP if required)
  415.    case OP_MEMBAR:
  416.       return false;
  417.    case OP_SAD:
  418.       return ty == TYPE_S32;
  419.    default:
  420.       return true;
  421.    }
  422. }
  423.  
  424. bool
  425. TargetNV50::isModSupported(const Instruction *insn, int s, Modifier mod) const
  426. {
  427.    if (!isFloatType(insn->dType)) {
  428.       switch (insn->op) {
  429.       case OP_ABS:
  430.       case OP_NEG:
  431.       case OP_CVT:
  432.       case OP_CEIL:
  433.       case OP_FLOOR:
  434.       case OP_TRUNC:
  435.       case OP_AND:
  436.       case OP_OR:
  437.       case OP_XOR:
  438.          break;
  439.       case OP_ADD:
  440.          if (insn->src(s ? 0 : 1).mod.neg())
  441.             return false;
  442.          break;
  443.       case OP_SUB:
  444.          if (s == 0)
  445.             return insn->src(1).mod.neg() ? false : true;
  446.          break;
  447.       case OP_SET:
  448.          if (insn->sType != TYPE_F32)
  449.             return false;
  450.          break;
  451.       default:
  452.          return false;
  453.       }
  454.    }
  455.    if (s >= 3)
  456.       return false;
  457.    return (mod & Modifier(opInfo[insn->op].srcMods[s])) == mod;
  458. }
  459.  
  460. bool
  461. TargetNV50::mayPredicate(const Instruction *insn, const Value *pred) const
  462. {
  463.    if (insn->getPredicate() || insn->flagsSrc >= 0)
  464.       return false;
  465.    for (int s = 0; insn->srcExists(s); ++s)
  466.       if (insn->src(s).getFile() == FILE_IMMEDIATE)
  467.          return false;
  468.    return opInfo[insn->op].predicate;
  469. }
  470.  
  471. bool
  472. TargetNV50::isSatSupported(const Instruction *insn) const
  473. {
  474.    if (insn->op == OP_CVT)
  475.       return true;
  476.    if (insn->dType != TYPE_F32)
  477.       return false;
  478.    return opInfo[insn->op].dstMods & NV50_IR_MOD_SAT;
  479. }
  480.  
  481. int TargetNV50::getLatency(const Instruction *i) const
  482. {
  483.    // TODO: tune these values
  484.    if (i->op == OP_LOAD) {
  485.       switch (i->src(0).getFile()) {
  486.       case FILE_MEMORY_LOCAL:
  487.       case FILE_MEMORY_GLOBAL:
  488.          return 100; // really 400 to 800
  489.       default:
  490.          return 22;
  491.       }
  492.    }
  493.    return 22;
  494. }
  495.  
  496. // These are "inverse" throughput values, i.e. the number of cycles required
  497. // to issue a specific instruction for a full warp (32 threads).
  498. //
  499. // Assuming we have more than 1 warp in flight, a higher issue latency results
  500. // in a lower result latency since the MP will have spent more time with other
  501. // warps.
  502. // This also helps to determine the number of cycles between instructions in
  503. // a single warp.
  504. //
  505. int TargetNV50::getThroughput(const Instruction *i) const
  506. {
  507.    // TODO: tune these values
  508.    if (i->dType == TYPE_F32) {
  509.       switch (i->op) {
  510.       case OP_RCP:
  511.       case OP_RSQ:
  512.       case OP_LG2:
  513.       case OP_SIN:
  514.       case OP_COS:
  515.       case OP_PRESIN:
  516.       case OP_PREEX2:
  517.          return 16;
  518.       default:
  519.          return 4;
  520.       }
  521.    } else
  522.    if (i->dType == TYPE_U32 || i->dType == TYPE_S32) {
  523.       return 4;
  524.    } else
  525.    if (i->dType == TYPE_F64) {
  526.       return 32;
  527.    } else {
  528.       return 1;
  529.    }
  530. }
  531.  
  532. static void
  533. recordLocation(uint16_t *locs, uint8_t *masks,
  534.                const struct nv50_ir_varying *var)
  535. {
  536.    uint16_t addr = var->slot[0] * 4;
  537.  
  538.    switch (var->sn) {
  539.    case TGSI_SEMANTIC_POSITION: locs[SV_POSITION] = addr; break;
  540.    case TGSI_SEMANTIC_INSTANCEID: locs[SV_INSTANCE_ID] = addr; break;
  541.    case TGSI_SEMANTIC_VERTEXID: locs[SV_VERTEX_ID] = addr; break;
  542.    case TGSI_SEMANTIC_PRIMID: locs[SV_PRIMITIVE_ID] = addr; break;
  543.    case TGSI_SEMANTIC_LAYER: locs[SV_LAYER] = addr; break;
  544.    case TGSI_SEMANTIC_VIEWPORT_INDEX: locs[SV_VIEWPORT_INDEX] = addr; break;
  545.    default:
  546.       break;
  547.    }
  548.    if (var->sn == TGSI_SEMANTIC_POSITION && masks)
  549.       masks[0] = var->mask;
  550. }
  551.  
  552. void
  553. TargetNV50::parseDriverInfo(const struct nv50_ir_prog_info *info)
  554. {
  555.    unsigned int i;
  556.    for (i = 0; i < info->numOutputs; ++i)
  557.       recordLocation(sysvalLocation, NULL, &info->out[i]);
  558.    for (i = 0; i < info->numInputs; ++i)
  559.       recordLocation(sysvalLocation, &wposMask, &info->in[i]);
  560.    for (i = 0; i < info->numSysVals; ++i)
  561.       recordLocation(sysvalLocation, NULL, &info->sv[i]);
  562.  
  563.    if (sysvalLocation[SV_POSITION] >= 0x200) {
  564.       // not assigned by driver, but we need it internally
  565.       wposMask = 0x8;
  566.       sysvalLocation[SV_POSITION] = 0;
  567.    }
  568. }
  569.  
  570. } // namespace nv50_ir
  571.