src/mesa/pipe/llvm/storagesoa.cpp

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   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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  16  * of the Software.
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  27
  28 #include "storagesoa.h"
  29
  30
  31 #include "pipe/p_shader_tokens.h"
  32 #include <llvm/BasicBlock.h>
  33 #include <llvm/Module.h>
  34 #include <llvm/Value.h>
  35
  36 #include <llvm/CallingConv.h>
  37 #include <llvm/Constants.h>
  38 #include <llvm/DerivedTypes.h>
  39 #include <llvm/InstrTypes.h>
  40 #include <llvm/Instructions.h>
  41
  42 using namespace llvm;
  43
  44 StorageSoa::StorageSoa(llvm::BasicBlock *block,
  45                        llvm::Value *input,
  46                        llvm::Value *output,
  47                        llvm::Value *consts)
  48    : m_block(block),
  49      m_input(input),
  50      m_output(output),
  51      m_consts(consts),
  52      m_idx(0)
  53 {
  54 }
  55
  56 void StorageSoa::addImmediate(float *vec)
  57 {
  58 }
  59
  60 llvm::Value *StorageSoa::addrElement(int idx) const
  61 {
  62    return 0;
  63 }
  64
  65 std::vector<llvm::Value*> StorageSoa::inputElement(int idx, int swizzle,
  66                                                    llvm::Value *indIdx)
  67 {
  68    std::vector<llvm::Value*> res(4);
  69
  70    res[0] = element(m_input, idx, 0);
  71    res[1] = element(m_input, idx, 0);
  72    res[2] = element(m_input, idx, 0);
  73    res[3] = element(m_input, idx, 0);
  74
  75    return res;
  76 }
  77
  78 std::vector<llvm::Value*> StorageSoa::constElement(int idx, int swizzle,
  79                                                    llvm::Value *indIdx)
  80 {
  81    std::vector<llvm::Value*> res(4);
  82
  83    return res;
  84 }
  85
  86 std::vector<llvm::Value*> StorageSoa::outputElement(int idx, int swizzle,
  87                                                     llvm::Value *indIdx)
  88 {
  89    std::vector<llvm::Value*> res(4);
  90
  91    res[0] = element(m_output, idx, 0);
  92    res[1] = element(m_output, idx, 0);
  93    res[2] = element(m_output, idx, 0);
  94    res[3] = element(m_output, idx, 0);
  95
  96    return res;
  97 }
  98
  99 std::vector<llvm::Value*> StorageSoa::tempElement(int idx, int swizzle,
 100                                                   llvm::Value *indIdx)
 101 {
 102    std::vector<llvm::Value*> res(4);
 103
 104    return res;
 105 }
 106
 107 std::vector<llvm::Value*> StorageSoa::immediateElement(int idx, int swizzle)
 108 {
 109    std::vector<llvm::Value*> res(4);
 110
 111    return res;
 112 }
 113
 114 llvm::Value * StorageSoa::extractIndex(llvm::Value *vec)
 115 {
 116    return 0;
 117 }
 118
 119 void StorageSoa::storeOutput(int dstIdx, const std::vector<llvm::Value*> &val,
 120                              int mask)
 121 {
 122    if (mask != TGSI_WRITEMASK_XYZW) {
 123       fprintf(stderr, "requires swizzle!!\n");
 124       assert(0);
 125    } else {
 126       llvm::Value *xChannel = elementPointer(m_output, dstIdx, 0);
 127       llvm::Value *yChannel = elementPointer(m_output, dstIdx, 1);
 128       llvm::Value *zChannel = elementPointer(m_output, dstIdx, 2);
 129       llvm::Value *wChannel = elementPointer(m_output, dstIdx, 3);
 130
 131       StoreInst *st = new StoreInst(val[0], xChannel, false, m_block);
 132       st = new StoreInst(val[1], yChannel, false, m_block);
 133       st = new StoreInst(val[2], zChannel, false, m_block);
 134       st = new StoreInst(val[3], wChannel, false, m_block);
 135    }
 136 }
 137
 138 void StorageSoa::storeTemp(int idx, const std::vector<llvm::Value*> &val,
 139                            int mask)
 140 {
 141 }
 142
 143 void StorageSoa::storeAddress(int idx, const std::vector<llvm::Value*> &val,
 144                               int mask)
 145 {
 146 }
 147
 148 llvm::Value * StorageSoa::elementPointer(llvm::Value *ptr, int index,
 149                                          int channel) const
 150 {
 151    std::vector<Value*> indices;
 152    indices.push_back(constantInt(index));
 153    indices.push_back(constantInt(channel));
 154
 155    GetElementPtrInst *getElem = new GetElementPtrInst(ptr,
 156                                                       indices.begin(),
 157                                                       indices.end(),
 158                                                       name("ptr"),
 159                                                       m_block);
 160    return getElem;
 161 }
 162
 163 llvm::Value * StorageSoa::element(llvm::Value *ptr, int index,
 164                                   int channel) const
 165 {
 166    llvm::Value *res = elementPointer(ptr, index, channel);
 167    LoadInst *load = new LoadInst(res, name("element"), false, m_block);
 168    //load->setAlignment(8);
 169    return load;
 170 }
 171
 172 const char * StorageSoa::name(const char *prefix) const
 173 {
 174    ++m_idx;
 175    snprintf(m_name, 32, "%s%d", prefix, m_idx);
 176    return m_name;
 177 }
 178
 179 llvm::ConstantInt * StorageSoa::constantInt(int idx) const
 180 {
 181    if (m_constInts.find(idx) != m_constInts.end()) {
 182       return m_constInts[idx];
 183    }
 184    ConstantInt *constInt = ConstantInt::get(APInt(32,  idx));
 185    m_constInts[idx] = constInt;
 186    return constInt;
 187 }