QuantizeValue Class — pytorch Architecture

Source Code

aten/src/ATen/native/quantized/cpu/QnnpackUtils.h lines 385–393

template<typename T>
inline T QuantizeValue(float scale, int32_t zero_point, float value) {
  const int32_t qmin = std::numeric_limits<T>::min();
  const int32_t qmax = std::numeric_limits<T>::max();
  auto r = zero_point + static_cast<int32_t>(std::nearbyint(value / scale));
  r = std::max(r, qmin);
  r = std::min(r, qmax);
  return static_cast<T>(r);
}