Exemple #1
0
// Iterate over the tuples in the sorter in batches/vectors of the given size
void Sorter::VectorizedIterate(
    CodeGen &codegen, llvm::Value *sorter_ptr, uint32_t vector_size,
    uint64_t offset, Sorter::VectorizedIterateCallback &callback) const {
  llvm::Value *start_pos = codegen.Load(SorterProxy::tuples_start, sorter_ptr);
  llvm::Value *num_tuples = NumTuples(codegen, sorter_ptr);
  num_tuples = codegen->CreateTrunc(num_tuples, codegen.Int32Type());

  if (offset != 0) {
    start_pos = codegen->CreateConstInBoundsGEP1_32(codegen.CharPtrType(),
                                                    start_pos, offset);
    num_tuples = codegen->CreateSub(num_tuples, codegen.Const32(offset));
  }

  lang::VectorizedLoop loop(codegen, num_tuples, vector_size, {});
  {
    // Current loop range
    auto curr_range = loop.GetCurrentRange();

    // Provide an accessor into the sorted space
    SorterAccess sorter_access(*this, start_pos);

    // Issue the callback
    callback.ProcessEntries(codegen, curr_range.start, curr_range.end,
                            sorter_access);

    // That's it
    loop.LoopEnd(codegen, {});
  }
}
Exemple #2
0
// Iterate over the tuples in the sorter in batches/vectors of the given size
void Sorter::VectorizedIterate(
    CodeGen &codegen, llvm::Value *sorter_ptr, uint32_t vector_size,
    Sorter::VectorizedIterateCallback &callback) const {
  llvm::Value *start_pos = GetStartPosition(codegen, sorter_ptr);

  llvm::Value *num_tuples = GetNumberOfStoredTuples(codegen, sorter_ptr);

  // Determine the number of bytes to skip per vector
  llvm::Value *vec_sz = codegen.Const32(vector_size);
  llvm::Value *tuple_size = GetTupleSize(codegen);
  llvm::Value *skip = codegen->CreateMul(vec_sz, tuple_size);

  lang::VectorizedLoop loop{
      codegen, num_tuples, vector_size, {{"pos", start_pos}}};
  {
    llvm::Value *curr_pos = loop.GetLoopVar(0);
    auto curr_range = loop.GetCurrentRange();

    // Provide an accessor into the sorted space
    SorterAccess sorter_access{*this, start_pos};

    // Issue the callback
    callback.ProcessEntries(codegen, curr_range.start, curr_range.end,
                            sorter_access);

    // Bump the pointer by the size of a tuple
    llvm::Value *next_pos = codegen->CreateInBoundsGEP(curr_pos, skip);
    loop.LoopEnd(codegen, {next_pos});
  }
}
Exemple #3
0
// Iterate over the tuples in the sorter in batches/vectors of the given size
void Sorter::VectorizedIterate(
    CodeGen &codegen, llvm::Value *sorter_ptr, uint32_t vector_size,
    Sorter::VectorizedIterateCallback &callback) const {
  llvm::Value *start_pos = GetStartPosition(codegen, sorter_ptr);
  llvm::Value *num_tuples = GetNumberOfStoredTuples(codegen, sorter_ptr);
  lang::VectorizedLoop loop{codegen, num_tuples, vector_size, {}};
  {
    // Current loop range
    auto curr_range = loop.GetCurrentRange();

    // Provide an accessor into the sorted space
    SorterAccess sorter_access{*this, start_pos};

    // Issue the callback
    callback.ProcessEntries(codegen, curr_range.start, curr_range.end,
                            sorter_access);

    // That's it
    loop.LoopEnd(codegen, {});
  }
}