test-half-precision.cxx File Reference

#include "HDF5Utils/Writer.h"
#include <random>

Include dependency graph for test-half-precision.cxx:

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Classes
struct	out_t

Macros
#define	ADD(NAME)
#define	HADD(NAME)

Typedefs
using	consumer_t = H5Utils::Consumers<const out_t&>
using	mt_t = decltype(std::mt19937())

Functions
consumer_t	getFullConsumers ()
consumer_t	getHalfConsumers ()
std::vector< out_t >	getOutputs (size_t length, mt_t &rand)
void	fill (H5::Group &out_file, size_t iterations)
int	main (int nargs, char *argv[])

Macro Definition Documentation

ADD

#define ADD

(

NAME

)

Value:

consumers.add(#NAME, [](const out_t& o){ return o.NAME;}, 0)

Definition at line 19 of file test-half-precision.cxx.

HADD

#define HADD

(

NAME

)

Value:

consumers.add(#NAME, [](const out_t& o){ return o.NAME;}, 0, h)

Definition at line 20 of file test-half-precision.cxx.

Typedef Documentation

consumer_t

using consumer_t = H5Utils::Consumers<const out_t&>

Definition at line 17 of file test-half-precision.cxx.

mt_t

using mt_t = decltype(std::mt19937())

Definition at line 42 of file test-half-precision.cxx.

Function Documentation

fill()

void fill	(	H5::Group &	out_file,
		size_t	iterations )

Definition at line 64 of file test-half-precision.cxx.

                                                {
 
  const int deflate = 7;
  const int max_width = 10;
  std::mt19937 random(42);
 
  // compare outputs
  using writer_t = H5Utils::Writer<1, consumer_t::input_type>;
  writer_t::configuration_type config;
  config.name = "full";
  config.extent = {max_width};
  config.deflate = deflate;
  writer_t full(out_file, getFullConsumers(), config);
  config.name = "half";
  writer_t half(out_file, getHalfConsumers(), config);
  std::uniform_int_distribution<int> width(0, max_width+1);
  for (size_t n = 0; n < iterations; n++) {
    auto out = getOutputs(width(random), random);
    full.fill(out);
    half.fill(out);
  }
}

getFullConsumers()

consumer_t getFullConsumers

(

)

Definition at line 23 of file test-half-precision.cxx.

                              {
  consumer_t consumers;
  ADD(ftype);
  ADD(dtype);
  ADD(btype);
  return consumers;
}

getHalfConsumers()

consumer_t getHalfConsumers

(

)

Definition at line 30 of file test-half-precision.cxx.

                              {
  consumer_t consumers;
  auto h = H5Utils::Compression::HALF_PRECISION;
  HADD(ftype);
  HADD(dtype);
  ADD(btype);
  return consumers;
}

getOutputs()

std::vector< out_t > getOutputs	(	size_t	length,
		mt_t &	rand )

Definition at line 44 of file test-half-precision.cxx.

                                                        {
  std::vector<out_t> outvec;
  std::uniform_int_distribution<int> exponent(-10, 2);
  std::uniform_real_distribution<float> man(-0.0001, 0.0001);
  std::uniform_int_distribution<short> booldist(0, 1);
  for (size_t n = 0; n < length; n++) {
    out_t out;
    double value = std::exp2(exponent(rand)) * (1 + man(rand));
    out.dtype = value;
    out.ftype = value;
    out.btype = booldist(rand);
    outvec.push_back(out);
  }
  return outvec;
}

main()

int main	(	int	nargs,
		char *	argv[] )

Definition at line 87 of file test-half-precision.cxx.

                                  {
  H5::H5File out_file("output.h5", H5F_ACC_TRUNC);
  size_t iterations = 1;
  if (nargs > 2) {
    return 1;
  }
  if (nargs > 1) iterations = std::atoi(argv[1]);
  fill(out_file, iterations);
  return 0;
}