souschef::GaussianFloat16DataChef Class Reference

#include <Gaussian.h>

Collaboration diagram for souschef::GaussianFloat16DataChef:

Public Member Functions
	GaussianFloat16DataChef (float mean, float stddev)
std::vector< uint8_t >	generate (int32_t count) const override
	Generate a sequence of 'count' elements as a byte sequence.
Public Member Functions inherited from souschef::DataChef
virtual	~DataChef ()=default

Detailed Description

Definition at line 44 of file Gaussian.h.

Constructor & Destructor Documentation

GaussianFloat16DataChef()

souschef::GaussianFloat16DataChef::GaussianFloat16DataChef ( float  mean, float  stddev  )

inline

Definition at line 47 of file Gaussian.h.

                                                    : _mean{mean}, _stddev{stddev}
  {
    // DO NOTHING
  }

Member Function Documentation

generate()

std::vector< uint8_t > souschef::GaussianFloat16DataChef::generate ( int32_t  count ) const

overridevirtual

Generate a sequence of 'count' elements as a byte sequence.

Let D be the return value of generate(N). Then, D.size() == N * sizeof(T) where T is the element type.

Implements souschef::DataChef.

Definition at line 75 of file Gaussian.cpp.

{
  auto time_stamp = std::chrono::system_clock::now().time_since_epoch().count();
  auto seed = static_cast<std::minstd_rand::result_type>(time_stamp);
 
  std::minstd_rand rand{static_cast<std::minstd_rand::result_type>(seed)};
  std::normal_distribution<float> dist{_mean, _stddev};
 
  std::vector<uint8_t> res;
 
  constexpr float max_cap = 1e9;
  constexpr float min_cap = -1e9;
  for (uint32_t n = 0; n < count; ++n)
  {
    float raw_value = dist(rand);
    const float capped_value = std::max(min_cap, std::min(max_cap, raw_value));
    const uint16_t value = fp16_ieee_from_fp32_value(capped_value);
    auto const arr = reinterpret_cast<const uint8_t *>(&value);
 
    for (uint32_t b = 0; b < sizeof(uint16_t); ++b)
    {
      res.emplace_back(arr[b]);
    }
  }
 
  return res;
}

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The documentation for this class was generated from the following files:

• compiler/souschef/include/souschef/Data/Gaussian.h
• compiler/souschef/src/Gaussian.cpp