#include "tsl/platform/errors.h"

namespace tensorflow {
namespace {

using ::stablehlo::quantization::CalculateBinIndexSafe;
using ::stablehlo::quantization::CalculateBinWidth;
using ::stablehlo::quantization::CalculateLowerBound;
using ::stablehlo::quantization::CalibrationOptions;
using CPUDevice = ::Eigen::ThreadPoolDevice;
using CalibrationMethod =
    ::stablehlo::quantization::CalibrationOptions_CalibrationMethod;

}  // namespace

namespace tensorflow {
namespace calibrator {
namespace {

using ::stablehlo::quantization::CalculateBinIndex;
using ::stablehlo::quantization::CalculateBinWidth;
using ::stablehlo::quantization::CalculateLowerBound;

// Gets the histogram frequencies for the given range.
float GetRangeFrequencies(absl::Span<const int64_t> histogram,
                          const float bin_width, const float lower_bound,

  return std::pow(2, std::ceil(std::log2(raw_bin_width)));
}

// Calculates the lower bound of the histogram. The lower bound is in form of
// `N * bin_width`.
inline float CalculateLowerBound(const float min_value, const float bin_width) {
  return std::floor(min_value / bin_width) * bin_width;
}

// Calculates the bin index of the current value.

inline int32_t CalculateActualNumBins(const float min_value,
                                      const float max_value,
                                      const float bin_width) {
  const float lower_bound = CalculateLowerBound(min_value, bin_width);
  return std::ceil((max_value - lower_bound) / bin_width);
}

TEST(CalibrationParametersTest, CalculateBinWidthSmallerThanOne) {